/*globals $, svgedit, svgCanvas, jsPDF*/
/*jslint vars: true, eqeq: true, todo: true, bitwise: true, continue: true, forin: true */
/*
 * svgcanvas.js
 *
 * Licensed under the MIT License
 *
 * Copyright(c) 2010 Alexis Deveria
 * Copyright(c) 2010 Pavol Rusnak
 * Copyright(c) 2010 Jeff Schiller
 *
 */

// Dependencies:
// 1) jQuery
// 2) pathseg.js
// 3) browser.js
// 4) svgtransformlist.js
// 5) math.js
// 6) units.js
// 7) svgutils.js
// 8) sanitize.js
// 9) history.js
// 10) select.js
// 11) draw.js
// 12) path.js
// 13) coords.js
// 14) recalculate.js

(function () {

if (!window.console) {
	window.console = {};
	window.console.log = function(str) {};
	window.console.dir = function(str) {};
}

if (window.opera) {
	window.console.log = function(str) { opera.postError(str); };
	window.console.dir = function(str) {};
}

}());

// Class: SvgCanvas
// The main SvgCanvas class that manages all SVG-related functions
//
// Parameters:
// container - The container HTML element that should hold the SVG root element
// config - An object that contains configuration data
$.SvgCanvas = function(container, config) {
// Alias Namespace constants
var NS = svgedit.NS;

// Default configuration options
var curConfig = {
	show_outside_canvas: true,
	selectNew: true,
	dimensions: [640, 480]
};

// Update config with new one if given
if (config) {
	$.extend(curConfig, config);
}

// Array with width/height of canvas
var dimensions = curConfig.dimensions;

var canvas = this;

// "document" element associated with the container (same as window.document using default svg-editor.js)
// NOTE: This is not actually a SVG document, but a HTML document.
var svgdoc = container.ownerDocument;

// This is a container for the document being edited, not the document itself.
var svgroot = svgdoc.importNode(svgedit.utilities.text2xml(
		'<svg id="svgroot" xmlns="' + NS.SVG + '" xlinkns="' + NS.XLINK + '" ' +
			'width="' + dimensions[0] + '" height="' + dimensions[1] + '" x="' + dimensions[0] + '" y="' + dimensions[1] + '" overflow="visible">' +
			'<defs>' +
				'<filter id="canvashadow" filterUnits="objectBoundingBox">' +
					'<feGaussianBlur in="SourceAlpha" stdDeviation="4" result="blur"/>'+
					'<feOffset in="blur" dx="5" dy="5" result="offsetBlur"/>'+
					'<feMerge>'+
						'<feMergeNode in="offsetBlur"/>'+
						'<feMergeNode in="SourceGraphic"/>'+
					'</feMerge>'+
				'</filter>'+
			'</defs>'+
		'</svg>').documentElement, true);
container.appendChild(svgroot);

// The actual element that represents the final output SVG element
var svgcontent = svgdoc.createElementNS(NS.SVG, 'svg');

// This function resets the svgcontent element while keeping it in the DOM.
var clearSvgContentElement = canvas.clearSvgContentElement = function() {
	while (svgcontent.firstChild) { svgcontent.removeChild(svgcontent.firstChild); }

	// TODO: Clear out all other attributes first?
	$(svgcontent).attr({
		id: 'svgcontent',
		width: dimensions[0],
		height: dimensions[1],
		x: dimensions[0],
		y: dimensions[1],
		overflow: curConfig.show_outside_canvas ? 'visible' : 'hidden',
		xmlns: NS.SVG,
		'xmlns:se': NS.SE,
		'xmlns:xlink': NS.XLINK
	}).appendTo(svgroot);

	// TODO: make this string optional and set by the client
	var comment = svgdoc.createComment(" Created with SVG-edit - https://github.com/SVG-Edit/svgedit");
	svgcontent.appendChild(comment);
};
clearSvgContentElement();

// Prefix string for element IDs
var idprefix = 'svg_';

// Function: setIdPrefix
// Changes the ID prefix to the given value
//
// Parameters: 
// p - String with the new prefix 
canvas.setIdPrefix = function(p) {
	idprefix = p;
};

// Current svgedit.draw.Drawing object
// @type {svgedit.draw.Drawing}
canvas.current_drawing_ = new svgedit.draw.Drawing(svgcontent, idprefix);

// Function: getCurrentDrawing
// Returns the current Drawing.
// @return {svgedit.draw.Drawing}
var getCurrentDrawing = canvas.getCurrentDrawing = function() {
	return canvas.current_drawing_;
};

// Float displaying the current zoom level (1 = 100%, .5 = 50%, etc)
var current_zoom = 1;

// pointer to current group (for in-group editing)
var current_group = null;

// Object containing data for the currently selected styles
var all_properties = {
	shape: {
		fill: (curConfig.initFill.color == 'none' ? '' : '#') + curConfig.initFill.color,
		fill_paint: null,
		fill_opacity: curConfig.initFill.opacity,
		stroke: '#' + curConfig.initStroke.color,
		stroke_paint: null,
		stroke_opacity: curConfig.initStroke.opacity,
		stroke_width: curConfig.initStroke.width,
		stroke_dasharray: 'none',
		stroke_linejoin: 'miter',
		stroke_linecap: 'butt',
		opacity: curConfig.initOpacity
	}
};

all_properties.text = $.extend(true, {}, all_properties.shape);
$.extend(all_properties.text, {
	fill: '#000000',
	stroke_width: curConfig.text.stroke_width,
	font_size: curConfig.text.font_size,
	font_family: curConfig.text.font_family
});

// Current shape style properties
var cur_shape = all_properties.shape;

// Array with all the currently selected elements
// default size of 1 until it needs to grow bigger
var selectedElements = [];

var getJsonFromSvgElement = this.getJsonFromSvgElement = function(data) {
    // Text node
    if(data.nodeType == 3) return data.nodeValue;

    var retval = {
        element: data.tagName,
        //namespace: nsMap[data.namespaceURI],
        attr: {},
        children: [],
    };

    // Itrate attributes
    for(var i=0; i < data.attributes.length; i++) {
        retval.attr[data.attributes[i].name] = data.attributes[i].value;
    };

    // Iterate children
    for(var i=0; i < data.childNodes.length; i++) {
        retval.children.push(getJsonFromSvgElement(data.childNodes[i]));
    }

    return retval;
}

// Function: addSvgElementFromJson
// Create a new SVG element based on the given object keys/values and add it to the current layer
// The element will be ran through cleanupElement before being returned 
//
// Parameters:
// data - Object with the following keys/values:
// * element - tag name of the SVG element to create
// * attr - Object with attributes key-values to assign to the new element
// * curStyles - Boolean indicating that current style attributes should be applied first
// * children - Optional array with data objects to be added recursively as children
//
// Returns: The new element
var addSvgElementFromJson = this.addSvgElementFromJson = function(data) {
	if (typeof(data) == 'string') return svgdoc.createTextNode(data);

	var shape = svgedit.utilities.getElem(data.attr.id);
	// if shape is a path but we need to create a rect/ellipse, then remove the path
	var current_layer = getCurrentDrawing().getCurrentLayer();
	if (shape && data.element != shape.tagName) {
		current_layer.removeChild(shape);
		shape = null;
	}
	if (!shape) {
		shape = svgdoc.createElementNS(NS.SVG, data.element);
		if (current_layer) {
			(current_group || current_layer).appendChild(shape);
		}
	}
	if (data.curStyles) {
		svgedit.utilities.assignAttributes(shape, {
			'fill': cur_shape.fill,
			'stroke': cur_shape.stroke,
			'stroke-width': cur_shape.stroke_width,
			'stroke-dasharray': cur_shape.stroke_dasharray,
			'stroke-linejoin': cur_shape.stroke_linejoin,
			'stroke-linecap': cur_shape.stroke_linecap,
			'stroke-opacity': cur_shape.stroke_opacity,
			'fill-opacity': cur_shape.fill_opacity,
			'opacity': cur_shape.opacity / 2,
			'style': 'pointer-events:inherit'
		}, 100);
	}
	svgedit.utilities.assignAttributes(shape, data.attr, 100);
	svgedit.utilities.cleanupElement(shape);

	// Children
	if (data.children) {
		data.children.forEach(function(child) {
			shape.appendChild(addSvgElementFromJson(child));
		});
	}

	return shape;
};

// import svgtransformlist.js
var getTransformList = canvas.getTransformList = svgedit.transformlist.getTransformList;

// import from math.js.
var transformPoint = svgedit.math.transformPoint;
var matrixMultiply = canvas.matrixMultiply = svgedit.math.matrixMultiply;
var hasMatrixTransform = canvas.hasMatrixTransform = svgedit.math.hasMatrixTransform;
var transformListToTransform = canvas.transformListToTransform = svgedit.math.transformListToTransform;
var snapToAngle = svgedit.math.snapToAngle;
var getMatrix = svgedit.math.getMatrix;

// initialize from units.js
// send in an object implementing the ElementContainer interface (see units.js)
svgedit.units.init({
	getBaseUnit: function() { return curConfig.baseUnit; },
	getElement: svgedit.utilities.getElem,
	getHeight: function() { return svgcontent.getAttribute('height')/current_zoom; },
	getWidth: function() { return svgcontent.getAttribute('width')/current_zoom; },
	getRoundDigits: function() { return save_options.round_digits; }
});
// import from units.js
var convertToNum = canvas.convertToNum = svgedit.units.convertToNum;

// import from svgutils.js
svgedit.utilities.init({
	getDOMDocument: function() { return svgdoc; },
	getDOMContainer: function() { return container; },
	getSVGRoot: function() { return svgroot; },
	// TODO: replace this mostly with a way to get the current drawing.
	getSelectedElements: function() { return selectedElements; },
	getSVGContent: function() { return svgcontent; },
	getBaseUnit: function() { return curConfig.baseUnit; },
	getSnappingStep: function() { return curConfig.snappingStep; }
});
var findDefs = canvas.findDefs = svgedit.utilities.findDefs;
var getUrlFromAttr = canvas.getUrlFromAttr = svgedit.utilities.getUrlFromAttr;
var getHref = canvas.getHref = svgedit.utilities.getHref;
var setHref = canvas.setHref = svgedit.utilities.setHref;
var getPathBBox = svgedit.utilities.getPathBBox;
var getBBox = canvas.getBBox = svgedit.utilities.getBBox;
var getRotationAngle = canvas.getRotationAngle = svgedit.utilities.getRotationAngle;
var getElem = canvas.getElem = svgedit.utilities.getElem;
var getRefElem = canvas.getRefElem = svgedit.utilities.getRefElem;
var assignAttributes = canvas.assignAttributes = svgedit.utilities.assignAttributes;
var cleanupElement = this.cleanupElement = svgedit.utilities.cleanupElement;

// import from coords.js
svgedit.coords.init({
	getDrawing: function() { return getCurrentDrawing(); },
	getGridSnapping: function() { return curConfig.gridSnapping; }
});
var remapElement = this.remapElement = svgedit.coords.remapElement;

// import from recalculate.js
svgedit.recalculate.init({
	getSVGRoot: function() { return svgroot; },
	getStartTransform: function() { return startTransform; },
	setStartTransform: function(transform) { startTransform = transform; }
});
var recalculateDimensions = this.recalculateDimensions = svgedit.recalculate.recalculateDimensions;

// import from sanitize.js
var nsMap = svgedit.getReverseNS();
var sanitizeSvg = canvas.sanitizeSvg = svgedit.sanitize.sanitizeSvg;

// import from history.js
var MoveElementCommand = svgedit.history.MoveElementCommand;
var InsertElementCommand = svgedit.history.InsertElementCommand;
var RemoveElementCommand = svgedit.history.RemoveElementCommand;
var ChangeElementCommand = svgedit.history.ChangeElementCommand;
var BatchCommand = svgedit.history.BatchCommand;
var call;
// Implement the svgedit.history.HistoryEventHandler interface.
canvas.undoMgr = new svgedit.history.UndoManager({
	handleHistoryEvent: function(eventType, cmd) {
		var EventTypes = svgedit.history.HistoryEventTypes;
		// TODO: handle setBlurOffsets.
		if (eventType == EventTypes.BEFORE_UNAPPLY || eventType == EventTypes.BEFORE_APPLY) {
			canvas.clearSelection();
		} else if (eventType == EventTypes.AFTER_APPLY || eventType == EventTypes.AFTER_UNAPPLY) {
			var elems = cmd.elements();
			canvas.pathActions.clear();
			call('changed', elems);
			var cmdType = cmd.type();
			var isApply = (eventType == EventTypes.AFTER_APPLY);
			if (cmdType == MoveElementCommand.type()) {
				var parent = isApply ? cmd.newParent : cmd.oldParent;
				if (parent == svgcontent) {
					canvas.identifyLayers();
				}
			} else if (cmdType == InsertElementCommand.type() ||
					cmdType == RemoveElementCommand.type()) {
				if (cmd.parent == svgcontent) {
					canvas.identifyLayers();
				}
				if (cmdType == InsertElementCommand.type()) {
					if (isApply) {restoreRefElems(cmd.elem);}
				} else {
					if (!isApply) {restoreRefElems(cmd.elem);}
				}
				if (cmd.elem.tagName === 'use') {
					setUseData(cmd.elem);
				}
			} else if (cmdType == ChangeElementCommand.type()) {
				// if we are changing layer names, re-identify all layers
				if (cmd.elem.tagName == 'title' && cmd.elem.parentNode.parentNode == svgcontent) {
					canvas.identifyLayers();
				}
				var values = isApply ? cmd.newValues : cmd.oldValues;
				// If stdDeviation was changed, update the blur.
				if (values.stdDeviation) {
					canvas.setBlurOffsets(cmd.elem.parentNode, values.stdDeviation);
				}
				// This is resolved in later versions of webkit, perhaps we should
				// have a featured detection for correct 'use' behavior?
				// ——————————
				// Remove & Re-add hack for Webkit (issue 775) 
				//if (cmd.elem.tagName === 'use' && svgedit.browser.isWebkit()) {
				//	var elem = cmd.elem;
				//	if (!elem.getAttribute('x') && !elem.getAttribute('y')) {
				//		var parent = elem.parentNode;
				//		var sib = elem.nextSibling;
				//		parent.removeChild(elem);
				//		parent.insertBefore(elem, sib);
				//	}
				//}
			}
		}
	}
});
var addCommandToHistory = function(cmd) {
	canvas.undoMgr.addCommandToHistory(cmd);
};

/**
 * Get a HistoryRecordingService.
 * @param {svgedit.history.HistoryRecordingService=} hrService - if exists, return it instead of creating a new service.
 * @returns {svgedit.history.HistoryRecordingService}
 */
function historyRecordingService(hrService) {
	return hrService ? hrService : new svgedit.history.HistoryRecordingService(canvas.undoMgr);
}

// import from select.js
svgedit.select.init(curConfig, {
	createSVGElement: function(jsonMap) { return canvas.addSvgElementFromJson(jsonMap); },
	svgRoot: function() { return svgroot; },
	svgContent: function() { return svgcontent; },
	currentZoom: function() { return current_zoom; },
	// TODO(codedread): Remove when getStrokedBBox() has been put into svgutils.js.
	getStrokedBBox: function(elems) { return canvas.getStrokedBBox([elems]); }
});
// this object manages selectors for us
var selectorManager = this.selectorManager = svgedit.select.getSelectorManager();

// Import from path.js
svgedit.path.init({
	getCurrentZoom: function() { return current_zoom; },
	getSVGRoot: function() { return svgroot; }
});

// Interface strings, usually for title elements
var uiStrings = {
	exportNoBlur: "Blurred elements will appear as un-blurred",
	exportNoforeignObject: "foreignObject elements will not appear",
	exportNoDashArray: "Strokes will appear filled",
	exportNoText: "Text may not appear as expected"
};

var visElems = 'a,circle,ellipse,foreignObject,g,image,line,path,polygon,polyline,rect,svg,text,tspan,use';
var ref_attrs = ['clip-path', 'fill', 'filter', 'marker-end', 'marker-mid', 'marker-start', 'mask', 'stroke'];

var elData = $.data;

// Animation element to change the opacity of any newly created element
var opac_ani = document.createElementNS(NS.SVG, 'animate');
$(opac_ani).attr({
	attributeName: 'opacity',
	begin: 'indefinite',
	dur: 1,
	fill: 'freeze'
}).appendTo(svgroot);

var restoreRefElems = function(elem) {
	// Look for missing reference elements, restore any found
	var o, i, l,
		attrs = $(elem).attr(ref_attrs);
	for (o in attrs) {
		var val = attrs[o];
		if (val && val.indexOf('url(') === 0) {
			var id = svgedit.utilities.getUrlFromAttr(val).substr(1);
			var ref = getElem(id);
			if (!ref) {
				svgedit.utilities.findDefs().appendChild(removedElements[id]);
				delete removedElements[id];
			}
		}
	}
	
	var childs = elem.getElementsByTagName('*');
	
	if (childs.length) {
		for (i = 0, l = childs.length; i < l; i++) {
			restoreRefElems(childs[i]);
		}
	}
};

(function() {
	// TODO For Issue 208: this is a start on a thumbnail
	//	var svgthumb = svgdoc.createElementNS(NS.SVG, 'use');
	//	svgthumb.setAttribute('width', '100');
	//	svgthumb.setAttribute('height', '100');
	//	svgedit.utilities.setHref(svgthumb, '#svgcontent');
	//	svgroot.appendChild(svgthumb);

}());

// Object to contain image data for raster images that were found encodable
var encodableImages = {},
	
	// String with image URL of last loadable image
	last_good_img_url = curConfig.imgPath + 'logo.png',
	
	// Array with current disabled elements (for in-group editing)
	disabled_elems = [],
	
	// Object with save options
	save_options = {round_digits: 5},
	
	// Boolean indicating whether or not a draw action has been started
	started = false,
	
	// String with an element's initial transform attribute value
	startTransform = null,
	
	// String indicating the current editor mode
	current_mode = 'select',
	
	// String with the current direction in which an element is being resized
	current_resize_mode = 'none',
	
	// Object with IDs for imported files, to see if one was already added
	import_ids = {},

	// Current text style properties
	cur_text = all_properties.text,
	
	// Current general properties
	cur_properties = cur_shape,
	
	// Array with selected elements' Bounding box object
//	selectedBBoxes = new Array(1),
	
	// The DOM element that was just selected
	justSelected = null,
	
	// DOM element for selection rectangle drawn by the user
	rubberBox = null,
	
	// Array of current BBoxes, used in getIntersectionList().
	curBBoxes = [],
	
	// Object to contain all included extensions
	extensions = {},
	
	// Canvas point for the most recent right click
	lastClickPoint = null,
	
	// Map of deleted reference elements
	removedElements = {};

// Should this return an array by default, so extension results aren't overwritten?
var runExtensions = this.runExtensions = function(action, vars, returnArray) {
	var result = returnArray ? [] : false;
	$.each(extensions, function(name, opts) {
		if (opts && action in opts) {
			if (returnArray) {
				result.push(opts[action](vars));
			} else {
				result = opts[action](vars);
			}
		}
	});
	return result;
};

// Function: addExtension
// Add an extension to the editor
// 
// Parameters:
// name - String with the ID of the extension
// ext_func - Function supplied by the extension with its data
this.addExtension = function(name, ext_func) {
	var ext;
	if (!(name in extensions)) {
		// Provide private vars/funcs here. Is there a better way to do this?
		if ($.isFunction(ext_func)) {
			ext = ext_func($.extend(canvas.getPrivateMethods(), {
				svgroot: svgroot,
				svgcontent: svgcontent,
				nonce: getCurrentDrawing().getNonce(),
				selectorManager: selectorManager
			}));
		} else {
			ext = ext_func;
		}
		extensions[name] = ext;
		call('extension_added', ext);
	} else {
		console.log('Cannot add extension "' + name + '", an extension by that name already exists.');
	}
};
	
// This method rounds the incoming value to the nearest value based on the current_zoom
var round = this.round = function(val) {
	return parseInt(val*current_zoom, 10)/current_zoom;
};

// This method sends back an array or a NodeList full of elements that
// intersect the multi-select rubber-band-box on the current_layer only.
// 
// We brute-force getIntersectionList for browsers that do not support it (Firefox).
// 
// Reference:
// Firefox does not implement getIntersectionList(), see https://bugzilla.mozilla.org/show_bug.cgi?id=501421
var getIntersectionList = this.getIntersectionList = function(rect) {
	if (rubberBox == null) { return null; }

	var parent = current_group || getCurrentDrawing().getCurrentLayer();

	var rubberBBox;
	if (!rect) {
		rubberBBox = rubberBox.getBBox();
		var o, bb = svgcontent.createSVGRect();

		for (o in rubberBBox) {
			bb[o] = rubberBBox[o] / current_zoom;
		}    
                rubberBBox = bb;
	} else {
		rubberBBox = svgcontent.createSVGRect();
		rubberBBox.x = rect.x;
		rubberBBox.y = rect.y;
		rubberBBox.width = rect.width;
		rubberBBox.height = rect.height;
	}
	
	var resultList = null;
	if (!svgedit.browser.isIE) {
		if (typeof(svgroot.getIntersectionList) == 'function') {
			// Offset the bbox of the rubber box by the offset of the svgcontent element.
			rubberBBox.x += parseInt(svgcontent.getAttribute('x'), 10);
			rubberBBox.y += parseInt(svgcontent.getAttribute('y'), 10);

			resultList = svgroot.getIntersectionList(rubberBBox, parent);
		}
	}

	if (resultList == null || typeof(resultList.item) != 'function') {
		resultList = [];

		if (!curBBoxes.length) {
			// Cache all bboxes
			curBBoxes = getVisibleElementsAndBBoxes(parent);
		}
		var i = curBBoxes.length;
		while (i--) {
			if (!rubberBBox.width) {continue;}
			if (svgedit.math.rectsIntersect(rubberBBox, curBBoxes[i].bbox)) {
				resultList.push(curBBoxes[i].elem);
			}
		}
	}

	// addToSelection expects an array, but it's ok to pass a NodeList 
	// because using square-bracket notation is allowed: 
	// http://www.w3.org/TR/DOM-Level-2-Core/ecma-script-binding.html
	return resultList;
};

// TODO(codedread): Migrate this into svgutils.js
// Function: getStrokedBBox
// Get the bounding box for one or more stroked and/or transformed elements
// 
// Parameters:
// elems - Array with DOM elements to check
// 
// Returns:
// A single bounding box object
var getStrokedBBox = this.getStrokedBBox = function(elems) {
	if (!elems) {elems = getVisibleElements();}
	return svgedit.utilities.getStrokedBBox(elems, addSvgElementFromJson, pathActions)
};

// Function: getVisibleElements
// Get all elements that have a BBox (excludes <defs>, <title>, etc).
// Note that 0-opacity, off-screen etc elements are still considered "visible"
// for this function
//
// Parameters:
// parent - The parent DOM element to search within
//
// Returns:
// An array with all "visible" elements.
var getVisibleElements = this.getVisibleElements = function(parent) {
	if (!parent) {
		parent = $(svgcontent).children(); // Prevent layers from being included
	}
	
	var contentElems = [];
	$(parent).children().each(function(i, elem) {
		if (elem.getBBox) {
			contentElems.push(elem);
		}
	});
	return contentElems.reverse();
};

// Function: getVisibleElementsAndBBoxes
// Get all elements that have a BBox (excludes <defs>, <title>, etc).
// Note that 0-opacity, off-screen etc elements are still considered "visible"
// for this function
//
// Parameters:
// parent - The parent DOM element to search within
//
// Returns:
// An array with objects that include:
// * elem - The element
// * bbox - The element's BBox as retrieved from getStrokedBBox
var getVisibleElementsAndBBoxes = this.getVisibleElementsAndBBoxes = function(parent) {
	if (!parent) {
		parent = $(svgcontent).children(); // Prevent layers from being included
	}
	var contentElems = [];
	$(parent).children().each(function(i, elem) {
		if (elem.getBBox) {
			contentElems.push({'elem':elem, 'bbox':getStrokedBBox([elem])});
		}
	});
	return contentElems.reverse();
};

// Function: groupSvgElem
// Wrap an SVG element into a group element, mark the group as 'gsvg'
//
// Parameters:
// elem - SVG element to wrap
var groupSvgElem = this.groupSvgElem = function(elem) {
	var g = document.createElementNS(NS.SVG, 'g');
	elem.parentNode.replaceChild(g, elem);
	$(g).append(elem).data('gsvg', elem)[0].id = getNextId();
};


// Set scope for these functions
var getId, getNextId;
var textActions, pathActions;

(function(c) {

	// Object to contain editor event names and callback functions
	var events = {};

	getId = c.getId = function() { return getCurrentDrawing().getId(); };
	getNextId = c.getNextId = function() { return getCurrentDrawing().getNextId(); };

	// Function: call
	// Run the callback function associated with the given event
	//
	// Parameters:
	// event - String with the event name
	// arg - Argument to pass through to the callback function
	call = c.call = function(event, arg) {
		if (events[event]) {
			return events[event](this, arg);
		}
	};

	// Function: bind
	// Attaches a callback function to an event
	//
	// Parameters:
	// event - String indicating the name of the event
	// f - The callback function to bind to the event
	//
	// Return:
	// The previous event
	c.bind = function(event, f) {
		var old = events[event];
		events[event] = f;
		return old;
	};

}(canvas));

// Function: canvas.prepareSvg
// Runs the SVG Document through the sanitizer and then updates its paths.
//
// Parameters:
// newDoc - The SVG DOM document
this.prepareSvg = function(newDoc) {
	this.sanitizeSvg(newDoc.documentElement);

	// convert paths into absolute commands
	var i, path, len,
		paths = newDoc.getElementsByTagNameNS(NS.SVG, 'path');
	for (i = 0, len = paths.length; i < len; ++i) {
		path = paths[i];
		path.setAttribute('d', pathActions.convertPath(path));
		pathActions.fixEnd(path);
	}
};

// Function: ffClone
// Hack for Firefox bugs where text element features aren't updated or get 
// messed up. See issue 136 and issue 137.
// This function clones the element and re-selects it 
// TODO: Test for this bug on load and add it to "support" object instead of 
// browser sniffing
//
// Parameters: 
// elem - The (text) DOM element to clone
var ffClone = function(elem) {
	if (!svgedit.browser.isGecko()) {return elem;}
	var clone = elem.cloneNode(true);
	elem.parentNode.insertBefore(clone, elem);
	elem.parentNode.removeChild(elem);
	selectorManager.releaseSelector(elem);
	selectedElements[0] = clone;
	selectorManager.requestSelector(clone).showGrips(true);
	return clone;
};


// this.each is deprecated, if any extension used this it can be recreated by doing this:
// $(canvas.getRootElem()).children().each(...)

// this.each = function(cb) {
//	$(svgroot).children().each(cb);
// };


// Function: setRotationAngle
// Removes any old rotations if present, prepends a new rotation at the
// transformed center
//
// Parameters:
// val - The new rotation angle in degrees
// preventUndo - Boolean indicating whether the action should be undoable or not
this.setRotationAngle = function(val, preventUndo) {
	// ensure val is the proper type
	val = parseFloat(val);
	var elem = selectedElements[0];
	var oldTransform = elem.getAttribute('transform');
	var bbox = svgedit.utilities.getBBox(elem);
	var cx = bbox.x+bbox.width/2, cy = bbox.y+bbox.height/2;
	var tlist = svgedit.transformlist.getTransformList(elem);
	
	// only remove the real rotational transform if present (i.e. at index=0)
	if (tlist.numberOfItems > 0) {
		var xform = tlist.getItem(0);
		if (xform.type == 4) {
			tlist.removeItem(0);
		}
	}
	// find R_nc and insert it
	if (val != 0) {
		var center = svgedit.math.transformPoint(cx, cy, svgedit.math.transformListToTransform(tlist).matrix);
		var R_nc = svgroot.createSVGTransform();
		R_nc.setRotate(val, center.x, center.y);
		if (tlist.numberOfItems) {
			tlist.insertItemBefore(R_nc, 0);
		} else {
			tlist.appendItem(R_nc);
		}
	} else if (tlist.numberOfItems == 0) {
		elem.removeAttribute('transform');
	}
	
	if (!preventUndo) {
		// we need to undo it, then redo it so it can be undo-able! :)
		// TODO: figure out how to make changes to transform list undo-able cross-browser?
		var newTransform = elem.getAttribute('transform');
		elem.setAttribute('transform', oldTransform);
		changeSelectedAttribute('transform', newTransform, selectedElements);
		call('changed', selectedElements);
	}
	var pointGripContainer = svgedit.utilities.getElem('pathpointgrip_container');
//		if (elem.nodeName == 'path' && pointGripContainer) {
//			pathActions.setPointContainerTransform(elem.getAttribute('transform'));
//		}
	var selector = selectorManager.requestSelector(selectedElements[0]);
	selector.resize();
	selector.updateGripCursors(val);
};

// Function: recalculateAllSelectedDimensions
// Runs recalculateDimensions on the selected elements, 
// adding the changes to a single batch command
var recalculateAllSelectedDimensions = this.recalculateAllSelectedDimensions = function() {
	var text = (current_resize_mode == 'none' ? 'position' : 'size');
	var batchCmd = new svgedit.history.BatchCommand(text);

	var i = selectedElements.length;
	while (i--) {
		var elem = selectedElements[i];
//			if (svgedit.utilities.getRotationAngle(elem) && !svgedit.math.hasMatrixTransform(getTransformList(elem))) {continue;}
		var cmd = svgedit.recalculate.recalculateDimensions(elem);
		if (cmd) {
			batchCmd.addSubCommand(cmd);
		}
	}

	if (!batchCmd.isEmpty()) {
		addCommandToHistory(batchCmd);
		call('changed', selectedElements);
	}
};


// Debug tool to easily see the current matrix in the browser's console
var logMatrix = function(m) {
	console.log([m.a, m.b, m.c, m.d, m.e, m.f]);
};

// Root Current Transformation Matrix in user units
var root_sctm = null;

// Group: Selection

// Function: clearSelection
// Clears the selection. The 'selected' handler is then called.
// Parameters: 
// noCall - Optional boolean that when true does not call the "selected" handler
var clearSelection = this.clearSelection = function(noCall) {
	selectedElements.map(function(elem){
		if(elem == null) return;

		selectorManager.releaseSelector(elem);
	});
	selectedElements = [];

	if (!noCall) {call('selected', selectedElements);}
};

// TODO: do we need to worry about selectedBBoxes here?


// Function: addToSelection
// Adds a list of elements to the selection. The 'selected' handler is then called.
//
// Parameters:
// elemsToAdd - an array of DOM elements to add to the selection
// showGrips - a boolean flag indicating whether the resize grips should be shown
var addToSelection = this.addToSelection = function(elemsToAdd, showGrips) {
	if (elemsToAdd.length == 0) { return; }
	// find the first null in our selectedElements array
	var j = 0;
	
	while (j < selectedElements.length) {
		if (selectedElements[j] == null) { 
			break;
		}
		++j;
	}

	// now add each element consecutively
	var i = elemsToAdd.length;
	while (i--) {
		var elem = elemsToAdd[i];
		if (!elem) {continue;}
		var bbox = svgedit.utilities.getBBox(elem);
		if (!bbox) {continue;}

		if (elem.tagName === 'a' && elem.childNodes.length === 1) {
			// Make "a" element's child be the selected element 
			elem = elem.firstChild;
		}

		// if it's not already there, add it
		if (selectedElements.indexOf(elem) == -1) {

			selectedElements[j] = elem;

			// only the first selectedBBoxes element is ever used in the codebase these days
//			if (j == 0) selectedBBoxes[0] = svgedit.utilities.getBBox(elem);
			j++;
			var sel = selectorManager.requestSelector(elem, bbox);
	
			if (selectedElements.length > 1) {
				sel.showGrips(false);
			}
		}
	}
	call('selected', selectedElements);
	
	if (showGrips || selectedElements.length == 1) {
		selectorManager.requestSelector(selectedElements[0]).showGrips(true);
	}
	else {
		selectorManager.requestSelector(selectedElements[0]).showGrips(false);
	}

	// make sure the elements are in the correct order
	// See: http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-compareDocumentPosition

	selectedElements.sort(function(a, b) {
		if (a && b && a.compareDocumentPosition) {
			return 3 - (b.compareDocumentPosition(a) & 6);	
		}
		if (a == null) {
			return 1;
		}
	});
	
	// Make sure first elements are not null
	while (selectedElements[0] == null) {
		selectedElements.shift(0);
	}
};

// Function: selectOnly()
// Selects only the given elements, shortcut for clearSelection(); addToSelection()
//
// Parameters:
// elems - an array of DOM elements to be selected
var selectOnly = this.selectOnly = function(elems, showGrips) {
	clearSelection(true);
	addToSelection(elems, showGrips);
};

// TODO: could use slice here to make this faster?
// TODO: should the 'selected' handler

// Function: removeFromSelection
// Removes elements from the selection.
//
// Parameters:
// elemsToRemove - an array of elements to remove from selection
var removeFromSelection = this.removeFromSelection = function(elemsToRemove) {
	if (selectedElements[0] == null) { return; }
	if (elemsToRemove.length == 0) { return; }

	// find every element and remove it from our array copy
	var i,
		j = 0,
		newSelectedItems = [],
		len = selectedElements.length;
	newSelectedItems.length = len;
	for (i = 0; i < len; ++i) {
		var elem = selectedElements[i];
		if (elem) {
			// keep the item
			if (elemsToRemove.indexOf(elem) == -1) {
				newSelectedItems[j] = elem;
				j++;
			} else { // remove the item and its selector
				selectorManager.releaseSelector(elem);
			}
		}
	}
	// the copy becomes the master now
	selectedElements = newSelectedItems;
};

// Function: selectAllInCurrentLayer
// Clears the selection, then adds all elements in the current layer to the selection.
this.selectAllInCurrentLayer = function() {
	var current_layer = getCurrentDrawing().getCurrentLayer();
	if (current_layer) {
		current_mode = 'select';
		selectOnly($(current_group || current_layer).children());
	}
};

// Function: getMouseTarget
// Gets the desired element from a mouse event
// 
// Parameters:
// evt - Event object from the mouse event
// 
// Returns:
// DOM element we want
var getMouseTarget = this.getMouseTarget = function(evt) {
	if (evt == null) {
		return null;
	}
	var mouse_target = evt.target;
	
	// if it was a <use>, Opera and WebKit return the SVGElementInstance
	if (mouse_target.correspondingUseElement) {mouse_target = mouse_target.correspondingUseElement;}
	
	// for foreign content, go up until we find the foreignObject
	// WebKit browsers set the mouse target to the svgcanvas div 
	if ([NS.MATH, NS.HTML].indexOf(mouse_target.namespaceURI) >= 0 && 
		mouse_target.id != 'svgcanvas') 
	{
		while (mouse_target.nodeName != 'foreignObject') {
			mouse_target = mouse_target.parentNode;
			if (!mouse_target) {return svgroot;}
		}
	}
	
	// Get the desired mouse_target with jQuery selector-fu
	// If it's root-like, select the root
	var current_layer = getCurrentDrawing().getCurrentLayer();
	if ([svgroot, container, svgcontent, current_layer].indexOf(mouse_target) >= 0) {
		return svgroot;
	}
	
	var $target = $(mouse_target);

	// If it's a selection grip, return the grip parent
	if ($target.closest('#selectorParentGroup').length) {
		// While we could instead have just returned mouse_target, 
		// this makes it easier to indentify as being a selector grip
		return selectorManager.selectorParentGroup;
	}

	while (mouse_target.parentNode !== (current_group || current_layer)) {
		mouse_target = mouse_target.parentNode;
	}
	
//	
//	// go up until we hit a child of a layer
//	while (mouse_target.parentNode.parentNode.tagName == 'g') {
//		mouse_target = mouse_target.parentNode;
//	}
	// Webkit bubbles the mouse event all the way up to the div, so we
	// set the mouse_target to the svgroot like the other browsers
//	if (mouse_target.nodeName.toLowerCase() == 'div') {
//		mouse_target = svgroot;
//	}
	
	return mouse_target;
};

// Mouse events
(function() {
	var d_attr = null,
		start_x = null,
		start_y = null,
		r_start_x = null,
		r_start_y = null,
		init_bbox = {},
		freehand = {
			minx: null,
			miny: null,
			maxx: null,
			maxy: null
		},
		sumDistance = 0,
		controllPoint2 = {x:0, y:0},
		controllPoint1 = {x:0, y:0},
		start = {x:0, y:0},
		end = {x:0, y:0},
		parameter,
		nextParameter,
		bSpline = {x:0, y:0},
		nextPos = {x:0, y:0},
		THRESHOLD_DIST = 0.8,
		STEP_COUNT = 10;

	var getBsplinePoint = function(t) {
		var spline = {x:0, y:0},
			p0 = controllPoint2,
			p1 = controllPoint1,
			p2 = start,
			p3 = end,
			S = 1.0 / 6.0,
			t2 = t * t,
			t3 = t2 * t;

		var m = [
				[-1, 3, -3, 1],
				[3, -6, 3, 0],
				[-3, 0, 3, 0],
				[1, 4, 1, 0]
			];

		spline.x = S * (
			(p0.x * m[0][0] + p1.x * m[0][1] + p2.x * m[0][2] + p3.x * m[0][3] ) * t3 +
				(p0.x * m[1][0] + p1.x * m[1][1] + p2.x * m[1][2] + p3.x * m[1][3] ) * t2 +
				(p0.x * m[2][0] + p1.x * m[2][1] + p2.x * m[2][2] + p3.x * m[2][3] ) * t +
				(p0.x * m[3][0] + p1.x * m[3][1] + p2.x * m[3][2] + p3.x * m[3][3] )
		);
		spline.y = S * (
			(p0.y * m[0][0] + p1.y * m[0][1] + p2.y * m[0][2] + p3.y * m[0][3] ) * t3 +
				(p0.y * m[1][0] + p1.y * m[1][1] + p2.y * m[1][2] + p3.y * m[1][3] ) * t2 +
				(p0.y * m[2][0] + p1.y * m[2][1] + p2.y * m[2][2] + p3.y * m[2][3] ) * t +
				(p0.y * m[3][0] + p1.y * m[3][1] + p2.y * m[3][2] + p3.y * m[3][3] )
		);

		return {
			x:spline.x,
			y:spline.y
		};
	};
	// - when we are in a create mode, the element is added to the canvas
	// but the action is not recorded until mousing up
	// - when we are in select mode, select the element, remember the position
	// and do nothing else
	var mouseDown = function(evt) {
		if (canvas.spaceKey || evt.button === 1) {return;}

		var right_click = evt.button === 2;
	
		if (evt.altKey) { // duplicate when dragging
			svgCanvas.cloneSelectedElements(0, 0);
		}
	
		root_sctm = $('#svgcontent g')[0].getScreenCTM().inverse();
		
		var pt = svgedit.math.transformPoint( evt.pageX, evt.pageY, root_sctm ),
			mouse_x = pt.x * current_zoom,
			mouse_y = pt.y * current_zoom;
			
		evt.preventDefault();

		if (right_click) {
			current_mode = 'select';
			lastClickPoint = pt;
		}
		
		// This would seem to be unnecessary...
//		if (['select', 'resize'].indexOf(current_mode) == -1) {
//			setGradient();
//		}
		
		var x = mouse_x / current_zoom,
			y = mouse_y / current_zoom,
			mouse_target = getMouseTarget(evt);
		
		if (mouse_target.tagName === 'a' && mouse_target.childNodes.length === 1) {
			mouse_target = mouse_target.firstChild;
		}
		
		// real_x/y ignores grid-snap value
		var real_x = x;
		r_start_x = start_x = x;
		var real_y = y;
		r_start_y = start_y = y;

		if (curConfig.gridSnapping){
			x = svgedit.utilities.snapToGrid(x);
			y = svgedit.utilities.snapToGrid(y);
			start_x = svgedit.utilities.snapToGrid(start_x);
			start_y = svgedit.utilities.snapToGrid(start_y);
		}

		// if it is a selector grip, then it must be a single element selected, 
		// set the mouse_target to that and update the mode to rotate/resize
		
		if (mouse_target == selectorManager.selectorParentGroup && selectedElements[0] != null) {
			var grip = evt.target;
			var griptype = elData(grip, 'type');
			// rotating
			if (griptype == 'rotate') {
				current_mode = 'rotate';
			}
			// resizing
			else if (griptype == 'resize') {
				current_mode = 'resize';
				current_resize_mode = elData(grip, 'dir');
			}
			mouse_target = selectedElements[0];
		}
		
		startTransform = mouse_target.getAttribute('transform');
		var i, stroke_w,
			tlist = svgedit.transformlist.getTransformList(mouse_target);
		switch (current_mode) {
			case 'select':
				started = true;
				current_resize_mode = 'none';
				if (right_click) {started = false;}
				
				if (mouse_target != svgroot) {
					// if this element is not yet selected, clear selection and select it
					if (selectedElements.indexOf(mouse_target) == -1) {
						// only clear selection if shift is not pressed (otherwise, add 
						// element to selection)
						if (!evt.shiftKey) {
							// No need to do the call here as it will be done on addToSelection
							clearSelection(true);
						}
						addToSelection([mouse_target]);
						justSelected = mouse_target;
						pathActions.clear();
					}
					// else if it's a path, go into pathedit mode in mouseup
					
					if (!right_click) {
						// insert a dummy transform so if the element(s) are moved it will have
						// a transform to use for its translate
						for (i = 0; i < selectedElements.length; ++i) {
							if (selectedElements[i] == null) {continue;}
							var slist = svgedit.transformlist.getTransformList(selectedElements[i]);
							if (slist.numberOfItems) {
								slist.insertItemBefore(svgroot.createSVGTransform(), 0);
							} else {
								slist.appendItem(svgroot.createSVGTransform());
							}
						}
					}
				} else if (!right_click){
					clearSelection();
					current_mode = 'multiselect';
					if (rubberBox == null) {
						rubberBox = selectorManager.getRubberBandBox();
					}
					r_start_x *= current_zoom;
					r_start_y *= current_zoom;
//					console.log('p',[evt.pageX, evt.pageY]);					
//					console.log('c',[evt.clientX, evt.clientY]);	
//					console.log('o',[evt.offsetX, evt.offsetY]);	
//					console.log('s',[start_x, start_y]);
					
					svgedit.utilities.assignAttributes(rubberBox, {
						'x': r_start_x,
						'y': r_start_y,
						'width': 0,
						'height': 0,
						'display': 'inline'
					}, 100);
				}
				break;
			case 'zoom': 
				started = true;
				if (rubberBox == null) {
					rubberBox = selectorManager.getRubberBandBox();
				}
				svgedit.utilities.assignAttributes(rubberBox, {
						'x': real_x * current_zoom,
						'y': real_x * current_zoom,
						'width': 0,
						'height': 0,
						'display': 'inline'
				}, 100);
				break;
			case 'resize':
				started = true;
				start_x = x;
				start_y = y;
				
				// Getting the BBox from the selection box, since we know we
				// want to orient around it
				init_bbox = svgedit.utilities.getBBox($('#selectedBox0')[0]);
				var bb = {};
				$.each(init_bbox, function(key, val) {
					bb[key] = val/current_zoom;
				});
				init_bbox = bb;
				
				// append three dummy transforms to the tlist so that
				// we can translate,scale,translate in mousemove
				var pos = svgedit.utilities.getRotationAngle(mouse_target) ? 1 : 0;
				
				if (svgedit.math.hasMatrixTransform(tlist)) {
					tlist.insertItemBefore(svgroot.createSVGTransform(), pos);
					tlist.insertItemBefore(svgroot.createSVGTransform(), pos);
					tlist.insertItemBefore(svgroot.createSVGTransform(), pos);
				} else {
					tlist.appendItem(svgroot.createSVGTransform());
					tlist.appendItem(svgroot.createSVGTransform());
					tlist.appendItem(svgroot.createSVGTransform());
					
					if (svgedit.browser.supportsNonScalingStroke()) {
						// Handle crash for newer Chrome and Safari 6 (Mobile and Desktop): 
						// https://code.google.com/p/svg-edit/issues/detail?id=904
						// Chromium issue: https://code.google.com/p/chromium/issues/detail?id=114625
						// TODO: Remove this workaround once vendor fixes the issue
						var isWebkit = svgedit.browser.isWebkit();

						if (isWebkit) {
							var delayedStroke = function(ele) {
								var _stroke = ele.getAttributeNS(null, 'stroke');
								ele.removeAttributeNS(null, 'stroke');
								// Re-apply stroke after delay. Anything higher than 1 seems to cause flicker
								if (_stroke !== null) setTimeout(function() { ele.setAttributeNS(null, 'stroke', _stroke); }, 0);
							};
						}
						mouse_target.style.vectorEffect = 'non-scaling-stroke';
						if (isWebkit) {delayedStroke(mouse_target);}

						var all = mouse_target.getElementsByTagName('*'),
							len = all.length;
						for (i = 0; i < len; i++) {
							all[i].style.vectorEffect = 'non-scaling-stroke';
							if (isWebkit) {delayedStroke(all[i]);}
						}
					}
				}
				break;
			case 'fhellipse':
			case 'fhrect':
			case 'fhpath':
				start.x = real_x;
				start.y = real_y;
				started = true;
				d_attr = real_x + ',' + real_y + ' ';
				stroke_w = cur_shape.stroke_width == 0 ? 1 : cur_shape.stroke_width;
				addSvgElementFromJson({
					element: 'polyline',
					curStyles: true,
					attr: {
						points: d_attr,
						id: getNextId(),
						fill: 'none',
						opacity: cur_shape.opacity / 2,
						'stroke-linecap': 'round',
						style: 'pointer-events:none'
					}
				});
				freehand.minx = real_x;
				freehand.maxx = real_x;
				freehand.miny = real_y;
				freehand.maxy = real_y;
				break;
			case 'image':
				started = true;
				var newImage = addSvgElementFromJson({
					element: 'image',
					attr: {
						x: x,
						y: y,
						width: 0,
						height: 0,
						id: getNextId(),
						opacity: cur_shape.opacity / 2,
						style: 'pointer-events:inherit'
					}
				});
				setHref(newImage, last_good_img_url);
				svgedit.utilities.preventClickDefault(newImage);
				break;
			case 'square':
				// FIXME: once we create the rect, we lose information that this was a square
				// (for resizing purposes this could be important)
			case 'rect':
				started = true;
				start_x = x;
				start_y = y;
				addSvgElementFromJson({
					element: 'rect',
					curStyles: true,
					attr: {
						x: x,
						y: y,
						width: 0,
						height: 0,
						id: getNextId(),
						opacity: cur_shape.opacity / 2
					}
				});
				break;
			case 'line':
				started = true;
				stroke_w = cur_shape.stroke_width == 0 ? 1 : cur_shape.stroke_width;
				addSvgElementFromJson({
					element: 'line',
					curStyles: true,
					attr: {
						x1: x,
						y1: y,
						x2: x,
						y2: y,
						id: getNextId(),
						stroke: cur_shape.stroke,
						'stroke-width': stroke_w,
						'stroke-dasharray': cur_shape.stroke_dasharray,
						'stroke-linejoin': cur_shape.stroke_linejoin,
						'stroke-linecap': cur_shape.stroke_linecap,
						'stroke-opacity': cur_shape.stroke_opacity,
						fill: 'none',
						opacity: cur_shape.opacity / 2,
						style: 'pointer-events:none'
					}
				});
				break;
			case 'circle':
				started = true;
				addSvgElementFromJson({
					element: 'circle',
					curStyles: true,
					attr: {
						cx: x,
						cy: y,
						r: 0,
						id: getNextId(),
						opacity: cur_shape.opacity / 2
					}
				});
				break;
			case 'ellipse':
				started = true;
				addSvgElementFromJson({
					element: 'ellipse',
					curStyles: true,
					attr: {
						cx: x,
						cy: y,
						rx: 0,
						ry: 0,
						id: getNextId(),
						opacity: cur_shape.opacity / 2
					}
				});
				break;
			case 'text':
				started = true;
				var newText = addSvgElementFromJson({
					element: 'text',
					curStyles: true,
					attr: {
						x: x,
						y: y,
						id: getNextId(),
						fill: cur_text.fill,
						'stroke-width': cur_text.stroke_width,
						'font-size': cur_text.font_size,
						'font-family': cur_text.font_family,
						'text-anchor': 'middle',
						'xml:space': 'preserve',
						opacity: cur_shape.opacity
					}
				});
//					newText.textContent = 'text';
				break;
			case 'path':
				// Fall through
			case 'pathedit':
				start_x *= current_zoom;
				start_y *= current_zoom;
				pathActions.mouseDown(evt, mouse_target, start_x, start_y);
				started = true;
				break;
			case 'textedit':
				start_x *= current_zoom;
				start_y *= current_zoom;
				textActions.mouseDown(evt, mouse_target, start_x, start_y);
				started = true;
				break;
			case 'rotate':
				started = true;
				// we are starting an undoable change (a drag-rotation)
				canvas.undoMgr.beginUndoableChange('transform', selectedElements);
				break;
			default:
				// This could occur in an extension
				break;
		}
		
		var ext_result = runExtensions('mouseDown', {
			event: evt,
			start_x: start_x,
			start_y: start_y,
			selectedElements: selectedElements
		}, true);
		
		$.each(ext_result, function(i, r) {
			if (r && r.started) {
				started = true;
			}
		});
	};
	
	// in this function we do not record any state changes yet (but we do update
	// any elements that are still being created, moved or resized on the canvas)
	var mouseMove = function(evt) {
		if (!started) {return;}
		if (evt.button === 1 || canvas.spaceKey) {return;}

		var i, xya, c, cx, cy, dx, dy, len, angle, box,
			selected = selectedElements[0],
			pt = svgedit.math.transformPoint( evt.pageX, evt.pageY, root_sctm ),
			mouse_x = pt.x * current_zoom,
			mouse_y = pt.y * current_zoom,
			shape = svgedit.utilities.getElem(getId());

		var real_x = mouse_x / current_zoom;
		x = real_x;
		var real_y = mouse_y / current_zoom;
		y = real_y;
	
		if (curConfig.gridSnapping){
			x = svgedit.utilities.snapToGrid(x);
			y = svgedit.utilities.snapToGrid(y);
		}

		evt.preventDefault();
		var tlist;
		switch (current_mode) {
			case 'select':
				// we temporarily use a translate on the element(s) being dragged
				// this transform is removed upon mousing up and the element is 
				// relocated to the new location
				if (selectedElements[0] !== null) {
					dx = x - start_x;
					dy = y - start_y;
					
					if (curConfig.gridSnapping){
						dx = svgedit.utilities.snapToGrid(dx);
						dy = svgedit.utilities.snapToGrid(dy);
					}

					if (evt.shiftKey) { 
						xya = svgedit.math.snapToAngle(start_x, start_y, x, y);
						x = xya.x;
						y = xya.y; 
					}

					if (dx != 0 || dy != 0) {
						len = selectedElements.length;
						for (i = 0; i < len; ++i) {
							selected = selectedElements[i];
							if (selected == null) {break;}
//							if (i==0) {
//								var box = svgedit.utilities.getBBox(selected);
//									selectedBBoxes[i].x = box.x + dx;
//									selectedBBoxes[i].y = box.y + dy;
//							}

							// update the dummy transform in our transform list
							// to be a translate
							var xform = svgroot.createSVGTransform();
							tlist = svgedit.transformlist.getTransformList(selected);
							// Note that if Webkit and there's no ID for this
							// element, the dummy transform may have gotten lost.
							// This results in unexpected behaviour
							
							xform.setTranslate(dx, dy);
							if (tlist.numberOfItems) {
								tlist.replaceItem(xform, 0);
							} else {
								tlist.appendItem(xform);
							}
							
							// update our internal bbox that we're tracking while dragging
							selectorManager.requestSelector(selected).resize();
						}
						
						call('transition', selectedElements);
					}
				}
				break;
			case 'multiselect':
				real_x *= current_zoom;
				real_y *= current_zoom;
				svgedit.utilities.assignAttributes(rubberBox, {
					'x': Math.min(r_start_x, real_x),
					'y': Math.min(r_start_y, real_y),
					'width': Math.abs(real_x - r_start_x),
					'height': Math.abs(real_y - r_start_y)
				}, 100);

				// for each selected:
				// - if newList contains selected, do nothing
				// - if newList doesn't contain selected, remove it from selected
				// - for any newList that was not in selectedElements, add it to selected
				var elemsToRemove = selectedElements.slice(), elemsToAdd = [],
					newList = getIntersectionList();

				// For every element in the intersection, add if not present in selectedElements.
				len = newList.length;
				for (i = 0; i < len; ++i) {
					var intElem = newList[i];
					// Found an element that was not selected before, so we should add it.
					if (selectedElements.indexOf(intElem) == -1) {
						elemsToAdd.push(intElem);
					}
					// Found an element that was already selected, so we shouldn't remove it.
					var foundInd = elemsToRemove.indexOf(intElem);
					if (foundInd != -1) {
						elemsToRemove.splice(foundInd, 1)
					}
				}
				
				if (elemsToRemove.length > 0) {
					canvas.removeFromSelection(elemsToRemove);
				}
				
				if (elemsToAdd.length > 0) {
					canvas.addToSelection(elemsToAdd);
				}
					
				break;
			case 'resize':
				// we track the resize bounding box and translate/scale the selected element
				// while the mouse is down, when mouse goes up, we use this to recalculate
				// the shape's coordinates
				tlist = svgedit.transformlist.getTransformList(selected);
				var hasMatrix = svgedit.math.hasMatrixTransform(tlist);
				box = hasMatrix ? init_bbox : svgedit.utilities.getBBox(selected);
				var left = box.x, top = box.y, width = box.width,
					height = box.height;
					dx = (x-start_x);
					dy = (y-start_y);
				
				if (curConfig.gridSnapping) {
					dx = svgedit.utilities.snapToGrid(dx);
					dy = svgedit.utilities.snapToGrid(dy);
					height = svgedit.utilities.snapToGrid(height);
					width = svgedit.utilities.snapToGrid(width);
				}

				// if rotated, adjust the dx,dy values
				angle = svgedit.utilities.getRotationAngle(selected);
				if (angle) {
					var r = Math.sqrt( dx*dx + dy*dy ),
						theta = Math.atan2(dy, dx) - angle * Math.PI / 180.0;
					dx = r * Math.cos(theta);
					dy = r * Math.sin(theta);
				}

				// if not stretching in y direction, set dy to 0
				// if not stretching in x direction, set dx to 0
				if (current_resize_mode.indexOf('n')==-1 && current_resize_mode.indexOf('s')==-1) {
					dy = 0;
				}
				if (current_resize_mode.indexOf('e')==-1 && current_resize_mode.indexOf('w')==-1) {
					dx = 0;
				}				
				
				var ts = null,
					tx = 0, ty = 0,
					sy = height ? (height+dy)/height : 1, 
					sx = width ? (width+dx)/width : 1;
				// if we are dragging on the north side, then adjust the scale factor and ty
				if (current_resize_mode.indexOf('n') >= 0) {
					sy = height ? (height-dy)/height : 1;
					ty = height;
				}
				
				// if we dragging on the east side, then adjust the scale factor and tx
				if (current_resize_mode.indexOf('w') >= 0) {
					sx = width ? (width-dx)/width : 1;
					tx = width;
				}
				
				// update the transform list with translate,scale,translate
				var translateOrigin = svgroot.createSVGTransform(),
					scale = svgroot.createSVGTransform(),
					translateBack = svgroot.createSVGTransform();

				if (curConfig.gridSnapping) {
					left = svgedit.utilities.snapToGrid(left);
					tx = svgedit.utilities.snapToGrid(tx);
					top = svgedit.utilities.snapToGrid(top);
					ty = svgedit.utilities.snapToGrid(ty);
				}

				translateOrigin.setTranslate(-(left+tx), -(top+ty));
				if (evt.shiftKey) {
					if (sx == 1) {sx = sy;}
					else {sy = sx;}
				}
				scale.setScale(sx, sy);
				
				translateBack.setTranslate(left+tx, top+ty);
				if (hasMatrix) {
					var diff = angle ? 1 : 0;
					tlist.replaceItem(translateOrigin, 2+diff);
					tlist.replaceItem(scale, 1+diff);
					tlist.replaceItem(translateBack, Number(diff));
				} else {
					var N = tlist.numberOfItems;
					tlist.replaceItem(translateBack, N-3);
					tlist.replaceItem(scale, N-2);
					tlist.replaceItem(translateOrigin, N-1);
				}

				selectorManager.requestSelector(selected).resize();
				
				call('transition', selectedElements);
				
				break;
			case 'zoom':
				real_x *= current_zoom;
				real_y *= current_zoom;
				svgedit.utilities.assignAttributes(rubberBox, {
					'x': Math.min(r_start_x*current_zoom, real_x),
					'y': Math.min(r_start_y*current_zoom, real_y),
					'width': Math.abs(real_x - r_start_x*current_zoom),
					'height': Math.abs(real_y - r_start_y*current_zoom)
				}, 100);			
				break;
			case 'text':
				svgedit.utilities.assignAttributes(shape,{
					'x': x,
					'y': y
				}, 1000);
				break;
			case 'line':
				if (curConfig.gridSnapping) {
					x = svgedit.utilities.snapToGrid(x);
					y = svgedit.utilities.snapToGrid(y);
				}

				var x2 = x;
				var y2 = y;					

				if (evt.shiftKey) {
					xya = svgedit.math.snapToAngle(start_x, start_y, x2, y2);
					x2 = xya.x;
					y2 = xya.y;
				}
				
				shape.setAttributeNS(null, 'x2', x2);
				shape.setAttributeNS(null, 'y2', y2);
				break;
			case 'foreignObject':
				// fall through
			case 'square':
				// fall through
			case 'rect':
				// fall through
			case 'image':
				var square = (current_mode == 'square') || evt.shiftKey,
					w = Math.abs(x - start_x),
					h = Math.abs(y - start_y),
					new_x, new_y;
				if (square) {
					w = h = Math.max(w, h);
					new_x = start_x < x ? start_x : start_x - w;
					new_y = start_y < y ? start_y : start_y - h;
				} else {
					new_x = Math.min(start_x, x);
					new_y = Math.min(start_y, y);
				}
	
				if (curConfig.gridSnapping) {
					w = svgedit.utilities.snapToGrid(w);
					h = svgedit.utilities.snapToGrid(h);
					new_x = svgedit.utilities.snapToGrid(new_x);
					new_y = svgedit.utilities.snapToGrid(new_y);
				}

				svgedit.utilities.assignAttributes(shape,{
					'width': w,
					'height': h,
					'x': new_x,
					'y': new_y
				},1000);
				
				break;
			case 'circle':
				c = $(shape).attr(['cx', 'cy']);
				cx = c.cx;
				cy = c.cy;
				var rad = Math.sqrt( (x-cx)*(x-cx) + (y-cy)*(y-cy) );
				if (curConfig.gridSnapping) {
					rad = svgedit.utilities.snapToGrid(rad);
				}
				shape.setAttributeNS(null, 'r', rad);
				break;
			case 'ellipse':
				c = $(shape).attr(['cx', 'cy']);
				cx = c.cx;
				cy = c.cy;
				if (curConfig.gridSnapping) {
					x = svgedit.utilities.snapToGrid(x);
					cx = svgedit.utilities.snapToGrid(cx);
					y = svgedit.utilities.snapToGrid(y);
					cy = svgedit.utilities.snapToGrid(cy);
				}
				shape.setAttributeNS(null, 'rx', Math.abs(x - cx) );
				var ry = Math.abs(evt.shiftKey?(x - cx):(y - cy));
				shape.setAttributeNS(null, 'ry', ry );
				break;
			case 'fhellipse':
			case 'fhrect':
				freehand.minx = Math.min(real_x, freehand.minx);
				freehand.maxx = Math.max(real_x, freehand.maxx);
				freehand.miny = Math.min(real_y, freehand.miny);
				freehand.maxy = Math.max(real_y, freehand.maxy);
			// break; missing on purpose
			case 'fhpath':
//				d_attr += + real_x + ',' + real_y + ' ';
//				shape.setAttributeNS(null, 'points', d_attr);
				end.x = real_x; end.y = real_y;
				if (controllPoint2.x && controllPoint2.y) {
					for (i = 0; i < STEP_COUNT - 1; i++) {
						parameter = i / STEP_COUNT;
						nextParameter = (i + 1) / STEP_COUNT;
						bSpline = getBsplinePoint(nextParameter);
						nextPos = bSpline;
						bSpline = getBsplinePoint(parameter);
						sumDistance += Math.sqrt((nextPos.x - bSpline.x) * (nextPos.x - bSpline.x) + (nextPos.y - bSpline.y) * (nextPos.y - bSpline.y));
						if (sumDistance > THRESHOLD_DIST) {
							d_attr += + bSpline.x + ',' + bSpline.y + ' ';
							shape.setAttributeNS(null, 'points', d_attr);
							sumDistance -= THRESHOLD_DIST;
						}
					}
				}
				controllPoint2 = {x:controllPoint1.x, y:controllPoint1.y};
				controllPoint1 = {x:start.x, y:start.y};
				start = {x:end.x, y:end.y};
				break;
			// update path stretch line coordinates
			case 'path':
				// fall through
			case 'pathedit':
				x *= current_zoom;
				y *= current_zoom;
				
				if (curConfig.gridSnapping) {
					x = svgedit.utilities.snapToGrid(x);
					y = svgedit.utilities.snapToGrid(y);
					start_x = svgedit.utilities.snapToGrid(start_x);
					start_y = svgedit.utilities.snapToGrid(start_y);
				}
				if (evt.shiftKey) {
					var path = svgedit.path.path;
					var x1, y1;
					if (path) {
						x1 = path.dragging?path.dragging[0]:start_x;
						y1 = path.dragging?path.dragging[1]:start_y;
					} else {
						x1 = start_x;
						y1 = start_y;
					}
					xya = svgedit.math.snapToAngle(x1, y1, x, y);
					x = xya.x;
					y = xya.y;
				}
				
				if (rubberBox && rubberBox.getAttribute('display') !== 'none') {
					real_x *= current_zoom;
					real_y *= current_zoom;
					svgedit.utilities.assignAttributes(rubberBox, {
						'x': Math.min(r_start_x*current_zoom, real_x),
						'y': Math.min(r_start_y*current_zoom, real_y),
						'width': Math.abs(real_x - r_start_x*current_zoom),
						'height': Math.abs(real_y - r_start_y*current_zoom)
					},100);	
				}
				pathActions.mouseMove(x, y);
				
				break;
			case 'textedit':
				x *= current_zoom;
				y *= current_zoom;
//					if (rubberBox && rubberBox.getAttribute('display') != 'none') {
//						svgedit.utilities.assignAttributes(rubberBox, {
//							'x': Math.min(start_x,x),
//							'y': Math.min(start_y,y),
//							'width': Math.abs(x-start_x),
//							'height': Math.abs(y-start_y)
//						},100);
//					}
				
				textActions.mouseMove(mouse_x, mouse_y);
				
				break;
			case 'rotate':
				box = svgedit.utilities.getBBox(selected);
				cx = box.x + box.width/2;
				cy = box.y + box.height/2;
				var m = svgedit.math.getMatrix(selected),
					center = svgedit.math.transformPoint(cx, cy, m);
				cx = center.x;
				cy = center.y;
				angle = ((Math.atan2(cy-y, cx-x) * (180/Math.PI))-90) % 360;
				if (curConfig.gridSnapping) {
					angle = svgedit.utilities.snapToGrid(angle);
				}
				if (evt.shiftKey) { // restrict rotations to nice angles (WRS)
					var snap = 45;
					angle= Math.round(angle/snap)*snap;
				}

				canvas.setRotationAngle(angle<-180?(360+angle):angle, true);
				call('transition', selectedElements);
				break;
			default:
				break;
		}
		
		runExtensions('mouseMove', {
			event: evt,
			mouse_x: mouse_x,
			mouse_y: mouse_y,
			selected: selected
		});

	}; // mouseMove()
	
	// - in create mode, the element's opacity is set properly, we create an InsertElementCommand
	// and store it on the Undo stack
	// - in move/resize mode, the element's attributes which were affected by the move/resize are
	// identified, a ChangeElementCommand is created and stored on the stack for those attrs
	// this is done in when we recalculate the selected dimensions()
	var mouseUp = function(evt) {
		if (evt.button === 2) {return;}
		var tempJustSelected = justSelected;
		justSelected = null;
		if (!started) {return;}
		var pt = svgedit.math.transformPoint(evt.pageX, evt.pageY, root_sctm),
			mouse_x = pt.x * current_zoom,
			mouse_y = pt.y * current_zoom,
			x = mouse_x / current_zoom,
			y = mouse_y / current_zoom,
			element = svgedit.utilities.getElem(getId()),
			keep = false;

		var real_x = x;
		var real_y = y;

		// TODO: Make true when in multi-unit mode
		var useUnit = false; // (curConfig.baseUnit !== 'px');
		started = false;
		var attrs, t;
		switch (current_mode) {
			// intentionally fall-through to select here
			case 'resize':
			case 'multiselect':
				if (rubberBox != null) {
					rubberBox.setAttribute('display', 'none');
					curBBoxes = [];
				}
				current_mode = 'select';
			case 'select':
				if (selectedElements[0] != null) {
					// if we only have one selected element
					if (selectedElements[1] == null) {
						// set our current stroke/fill properties to the element's
						var selected = selectedElements[0];
						switch ( selected.tagName ) {
							case 'g':
							case 'use':
							case 'image':
							case 'foreignObject':
								break;
							default:
								cur_properties.fill = selected.getAttribute('fill');
								cur_properties.fill_opacity = selected.getAttribute('fill-opacity');
								cur_properties.stroke = selected.getAttribute('stroke');
								cur_properties.stroke_opacity = selected.getAttribute('stroke-opacity');
								cur_properties.stroke_width = selected.getAttribute('stroke-width');
								cur_properties.stroke_dasharray = selected.getAttribute('stroke-dasharray');
								cur_properties.stroke_linejoin = selected.getAttribute('stroke-linejoin');
								cur_properties.stroke_linecap = selected.getAttribute('stroke-linecap');
						}

						if (selected.tagName == 'text') {
							cur_text.font_size = selected.getAttribute('font-size');
							cur_text.font_family = selected.getAttribute('font-family');
						}
						selectorManager.requestSelector(selected).showGrips(true);
						
						// This shouldn't be necessary as it was done on mouseDown...
//							call('selected', [selected]);
					}
					// always recalculate dimensions to strip off stray identity transforms
					recalculateAllSelectedDimensions();
					// if it was being dragged/resized
					if (real_x != r_start_x || real_y != r_start_y) {
						var i, len = selectedElements.length;
						for (i = 0; i < len; ++i) {
							if (selectedElements[i] == null) {break;}
							if (!selectedElements[i].firstChild) {
								// Not needed for groups (incorrectly resizes elems), possibly not needed at all?
								selectorManager.requestSelector(selectedElements[i]).resize();
							}
						}
					}
					// no change in position/size, so maybe we should move to pathedit
					else {
						t = evt.target;
						if (selectedElements[0].nodeName === 'path' && selectedElements[1] == null) {
							pathActions.select(selectedElements[0]);
						} // if it was a path
						// else, if it was selected and this is a shift-click, remove it from selection
						else if (evt.shiftKey) {
							if (tempJustSelected != t) {
								canvas.removeFromSelection([t]);
							}
						}
					} // no change in mouse position
					
					// Remove non-scaling stroke
					if (svgedit.browser.supportsNonScalingStroke()) {
						var elem = selectedElements[0];
						if (elem) {
							elem.removeAttribute('style');
							svgedit.utilities.walkTree(elem, function(elem) {
								elem.removeAttribute('style');
							});
						}
					}

				}
				return;
			case 'zoom':
				if (rubberBox != null) {
					rubberBox.setAttribute('display', 'none');
				}
				var factor = evt.shiftKey ? 0.5 : 2;
				call('zoomed', {
					'x': Math.min(r_start_x, real_x),
					'y': Math.min(r_start_y, real_y),
					'width': Math.abs(real_x - r_start_x),
					'height': Math.abs(real_y - r_start_y),
					'factor': factor
				});
				return;
			case 'fhpath':
				// Check that the path contains at least 2 points; a degenerate one-point path
				// causes problems.
				// Webkit ignores how we set the points attribute with commas and uses space
				// to separate all coordinates, see https://bugs.webkit.org/show_bug.cgi?id=29870
				sumDistance = 0;
				controllPoint2 = {x:0, y:0};
				controllPoint1 = {x:0, y:0};
				start = {x:0, y:0};
				end = {x:0, y:0};
				var coords = element.getAttribute('points');
				var commaIndex = coords.indexOf(',');
				if (commaIndex >= 0) {
					keep = coords.indexOf(',', commaIndex+1) >= 0;
				} else {
					keep = coords.indexOf(' ', coords.indexOf(' ')+1) >= 0;
				}
				if (keep) {
					element = pathActions.smoothPolylineIntoPath(element);
				}
				break;
			case 'line':
				attrs = $(element).attr(['x1', 'x2', 'y1', 'y2']);
				keep = (attrs.x1 != attrs.x2 || attrs.y1 != attrs.y2);
				break;
			case 'foreignObject':
			case 'square':
			case 'rect':
			case 'image':
				attrs = $(element).attr(['width', 'height']);
				// Image should be kept regardless of size (use inherit dimensions later)
				keep = (attrs.width != 0 || attrs.height != 0) || current_mode === 'image';
				break;
			case 'circle':
				keep = (element.getAttribute('r') != 0);
				break;
			case 'ellipse':
				attrs = $(element).attr(['rx', 'ry']);
				keep = (attrs.rx != null || attrs.ry != null);
				break;
			case 'fhellipse':
				if ((freehand.maxx - freehand.minx) > 0 &&
					(freehand.maxy - freehand.miny) > 0) {
					element = addSvgElementFromJson({
						element: 'ellipse',
						curStyles: true,
						attr: {
							cx: (freehand.minx + freehand.maxx) / 2,
							cy: (freehand.miny + freehand.maxy) / 2,
							rx: (freehand.maxx - freehand.minx) / 2,
							ry: (freehand.maxy - freehand.miny) / 2,
							id: getId()
						}
					});
					call('changed',[element]);
					keep = true;
				}
				break;
			case 'fhrect':
				if ((freehand.maxx - freehand.minx) > 0 &&
					(freehand.maxy - freehand.miny) > 0) {
					element = addSvgElementFromJson({
						element: 'rect',
						curStyles: true,
						attr: {
							x: freehand.minx,
							y: freehand.miny,
							width: (freehand.maxx - freehand.minx),
							height: (freehand.maxy - freehand.miny),
							id: getId()
						}
					});
					call('changed',[element]);
					keep = true;
				}
				break;
			case 'text':
				keep = true;
				selectOnly([element]);
				textActions.start(element);
				break;
			case 'path':
				// set element to null here so that it is not removed nor finalized
				element = null;
				// continue to be set to true so that mouseMove happens
				started = true;
				
				var res = pathActions.mouseUp(evt, element, mouse_x, mouse_y);
				element = res.element;
				keep = res.keep;
				break;
			case 'pathedit':
				keep = true;
				element = null;
				pathActions.mouseUp(evt);
				break;
			case 'textedit':
				keep = false;
				element = null;
				textActions.mouseUp(evt, mouse_x, mouse_y);
				break;
			case 'rotate':
				keep = true;
				element = null;
				current_mode = 'select';
				var batchCmd = canvas.undoMgr.finishUndoableChange();
				if (!batchCmd.isEmpty()) { 
					addCommandToHistory(batchCmd);
				}
				// perform recalculation to weed out any stray identity transforms that might get stuck
				recalculateAllSelectedDimensions();
				call('changed', selectedElements);
				break;
			default:
				// This could occur in an extension
				break;
		}
		
		var ext_result = runExtensions('mouseUp', {
			event: evt,
			mouse_x: mouse_x,
			mouse_y: mouse_y
		}, true);
		
		$.each(ext_result, function(i, r) {
			if (r) {
				keep = r.keep || keep;
				element = r.element;
				started = r.started || started;
			}
		});
		
		if (!keep && element != null) {
			getCurrentDrawing().releaseId(getId());
			element.parentNode.removeChild(element);
			element = null;
			
			t = evt.target;
			
			// if this element is in a group, go up until we reach the top-level group 
			// just below the layer groups
			// TODO: once we implement links, we also would have to check for <a> elements
			while (t.parentNode.parentNode.tagName == 'g') {
				t = t.parentNode;
			}
			// if we are not in the middle of creating a path, and we've clicked on some shape, 
			// then go to Select mode.
			// WebKit returns <div> when the canvas is clicked, Firefox/Opera return <svg>
			if ( (current_mode != 'path' || !drawn_path) &&
				t.parentNode.id != 'selectorParentGroup' &&
				t.id != 'svgcanvas' && t.id != 'svgroot') 
			{
				// switch into "select" mode if we've clicked on an element
				canvas.setMode('select');
				selectOnly([t], true);
			}
			
		} else if (element != null) {
			canvas.addedNew = true;
			
			if (useUnit) {svgedit.units.convertAttrs(element);}
			
			var ani_dur = 0.2, c_ani;
			if (opac_ani.beginElement && element.getAttribute('opacity') != cur_shape.opacity) {
				c_ani = $(opac_ani).clone().attr({
					to: cur_shape.opacity,
					dur: ani_dur
				}).appendTo(element);
				try {
					// Fails in FF4 on foreignObject
					c_ani[0].beginElement();
				} catch(e){}
			} else {
				ani_dur = 0;
			}
			
			// Ideally this would be done on the endEvent of the animation,
			// but that doesn't seem to be supported in Webkit
			setTimeout(function() {
				if (c_ani) {c_ani.remove();}
				element.setAttribute('opacity', cur_shape.opacity);
				element.setAttribute('style', 'pointer-events:inherit');
				cleanupElement(element);
				if (current_mode === 'path') {
					pathActions.toEditMode(element);
				} else if (curConfig.selectNew) {
					selectOnly([element], true);
				}
				// we create the insert command that is stored on the stack
				// undo means to call cmd.unapply(), redo means to call cmd.apply()
				addCommandToHistory(new svgedit.history.InsertElementCommand(element));
				
				call('changed',[element]);
			}, ani_dur * 1000);
		}
		
		startTransform = null;
	};
	
	var dblClick = function(evt) {
		var evt_target = evt.target;
		var parent = evt_target.parentNode;
		
		// Do nothing if already in current group
		if (parent === current_group) {return;}
		
		var mouse_target = getMouseTarget(evt);
		var tagName = mouse_target.tagName;
		
		if (tagName === 'text' && current_mode !== 'textedit') {
			var pt = svgedit.math.transformPoint( evt.pageX, evt.pageY, root_sctm );
			textActions.select(mouse_target, pt.x, pt.y);
		}
		
		if ((tagName === 'g' || tagName === 'a') && svgedit.utilities.getRotationAngle(mouse_target)) {
			// TODO: Allow method of in-group editing without having to do 
			// this (similar to editing rotated paths)
		
			// Ungroup and regroup
			pushGroupProperties(mouse_target);
			mouse_target = selectedElements[0];
			clearSelection(true);
		}
		// Reset context
		if (current_group) {
			leaveContext();
		}
		
		if ((parent.tagName !== 'g' && parent.tagName !== 'a') ||
			parent === getCurrentDrawing().getCurrentLayer() ||
			mouse_target === selectorManager.selectorParentGroup)
		{
			// Escape from in-group edit
			return;
		}
		setContext(mouse_target);
	};

	// prevent links from being followed in the canvas
	var handleLinkInCanvas = function(e) {
		e.preventDefault();
		return false;
	};
	
	// Added mouseup to the container here.
	// TODO(codedread): Figure out why after the Closure compiler, the window mouseup is ignored.
	$(container).mousedown(mouseDown).mousemove(mouseMove).click(handleLinkInCanvas).dblclick(dblClick).mouseup(mouseUp);
//	$(window).mouseup(mouseUp);
	
	 //TODO(rafaelcastrocouto): User preference for shift key and zoom factor
	$(container).bind('mousewheel DOMMouseScroll', function(e){
		//if (!e.shiftKey) {return;}
		e.preventDefault();
		var evt = e.originalEvent;

		root_sctm = $('#svgcontent g')[0].getScreenCTM().inverse();
		var pt = svgedit.math.transformPoint( evt.pageX, evt.pageY, root_sctm );

		var bbox = {
			'x': pt.x,
			'y': pt.y,
			'width': 0,
			'height': 0
		};

		var delta = (evt.wheelDelta) ? evt.wheelDelta : (evt.detail) ? -evt.detail : 0;
		if (!delta) {return;}

		bbox.factor = Math.max(3/4, Math.min(4/3, (delta)));
	
		call('zoomed', bbox);
	});
	
}());


// Group: Text edit functions
// Functions relating to editing text elements
textActions = canvas.textActions = (function() {
	var curtext;
	var textinput;
	var cursor;
	var selblock;
	var blinker;
	var chardata = [];
	var textbb, transbb;
	var matrix;
	var last_x, last_y;
	var allow_dbl;
	
	function setCursor(index) {
		var empty = (textinput.value === '');
		$(textinput).focus();
	
		if (!arguments.length) {
			if (empty) {
				index = 0;
			} else {
				if (textinput.selectionEnd !== textinput.selectionStart) {return;}
				index = textinput.selectionEnd;
			}
		}
		
		var charbb;
		charbb = chardata[index];
		if (!empty) {
			textinput.setSelectionRange(index, index);
		}
		cursor = svgedit.utilities.getElem('text_cursor');
		if (!cursor) {
			cursor = document.createElementNS(NS.SVG, 'line');
			svgedit.utilities.assignAttributes(cursor, {
				id: 'text_cursor',
				stroke: '#333',
				'stroke-width': 1
			});
			cursor = svgedit.utilities.getElem('selectorParentGroup').appendChild(cursor);
		}
		
		if (!blinker) {
			blinker = setInterval(function() {
				var show = (cursor.getAttribute('display') === 'none');
				cursor.setAttribute('display', show?'inline':'none');
			}, 600);
		}
		
		var start_pt = ptToScreen(charbb.x, textbb.y);
		var end_pt = ptToScreen(charbb.x, (textbb.y + textbb.height));
		
		svgedit.utilities.assignAttributes(cursor, {
			x1: start_pt.x,
			y1: start_pt.y,
			x2: end_pt.x,
			y2: end_pt.y,
			visibility: 'visible',
			display: 'inline'
		});
		
		if (selblock) {selblock.setAttribute('d', '');}
	}
	
	function setSelection(start, end, skipInput) {
		if (start === end) {
			setCursor(end);
			return;
		}
	
		if (!skipInput) {
			textinput.setSelectionRange(start, end);
		}
		
		selblock = svgedit.utilities.getElem('text_selectblock');
		if (!selblock) {

			selblock = document.createElementNS(NS.SVG, 'path');
			svgedit.utilities.assignAttributes(selblock, {
				id: 'text_selectblock',
				fill: 'green',
				opacity: 0.5,
				style: 'pointer-events:none'
			});
			svgedit.utilities.getElem('selectorParentGroup').appendChild(selblock);
		}

		var startbb = chardata[start];		
		var endbb = chardata[end];
		
		cursor.setAttribute('visibility', 'hidden');
		
		var tl = ptToScreen(startbb.x, textbb.y),
			tr = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y),
			bl = ptToScreen(startbb.x, textbb.y + textbb.height),
			br = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y + textbb.height);
		
		var dstr = 'M' + tl.x + ',' + tl.y
					+ ' L' + tr.x + ',' + tr.y
					+ ' ' + br.x + ',' + br.y
					+ ' ' + bl.x + ',' + bl.y + 'z';
		
		svgedit.utilities.assignAttributes(selblock, {
			d: dstr,
			'display': 'inline'
		});
	}
	
	function getIndexFromPoint(mouse_x, mouse_y) {
		// Position cursor here
		var pt = svgroot.createSVGPoint();
		pt.x = mouse_x;
		pt.y = mouse_y;

		// No content, so return 0
		if (chardata.length == 1) {return 0;}
		// Determine if cursor should be on left or right of character
		var charpos = curtext.getCharNumAtPosition(pt);
		if (charpos < 0) {
			// Out of text range, look at mouse coords
			charpos = chardata.length - 2;
			if (mouse_x <= chardata[0].x) {
				charpos = 0;
			}
		} else if (charpos >= chardata.length - 2) {
			charpos = chardata.length - 2;
		}
		var charbb = chardata[charpos];
		var mid = charbb.x + (charbb.width/2);
		if (mouse_x > mid) {
			charpos++;
		}
		return charpos;
	}
	
	function setCursorFromPoint(mouse_x, mouse_y) {
		setCursor(getIndexFromPoint(mouse_x, mouse_y));
	}
	
	function setEndSelectionFromPoint(x, y, apply) {
		var i1 = textinput.selectionStart;
		var i2 = getIndexFromPoint(x, y);
		
		var start = Math.min(i1, i2);
		var end = Math.max(i1, i2);
		setSelection(start, end, !apply);
	}
		
	function screenToPt(x_in, y_in) {
		var out = {
			x: x_in,
			y: y_in
		};
		
		out.x /= current_zoom;
		out.y /= current_zoom;			

		if (matrix) {
			var pt = svgedit.math.transformPoint(out.x, out.y, matrix.inverse());
			out.x = pt.x;
			out.y = pt.y;
		}
		
		return out;
	}	
	
	function ptToScreen(x_in, y_in) {
		var out = {
			x: x_in,
			y: y_in
		};
		
		if (matrix) {
			var pt = svgedit.math.transformPoint(out.x, out.y, matrix);
			out.x = pt.x;
			out.y = pt.y;
		}
		
		out.x *= current_zoom;
		out.y *= current_zoom;
		
		return out;
	}
	
	function hideCursor() {
		if (cursor) {
			cursor.setAttribute('visibility', 'hidden');
		}
	}
	
	function selectAll(evt) {
		setSelection(0, curtext.textContent.length);
		$(this).unbind(evt);
	}

	function selectWord(evt) {
		if (!allow_dbl || !curtext) {return;}
	
		var ept = svgedit.math.transformPoint( evt.pageX, evt.pageY, root_sctm ),
			mouse_x = ept.x * current_zoom,
			mouse_y = ept.y * current_zoom;
		var pt = screenToPt(mouse_x, mouse_y);
		
		var index = getIndexFromPoint(pt.x, pt.y);
		var str = curtext.textContent;
		var first = str.substr(0, index).replace(/[a-z0-9]+$/i, '').length;
		var m = str.substr(index).match(/^[a-z0-9]+/i);
		var last = (m?m[0].length:0) + index;
		setSelection(first, last);
		
		// Set tripleclick
		$(evt.target).click(selectAll);
		setTimeout(function() {
			$(evt.target).unbind('click', selectAll);
		}, 300);
		
	}

	return {
		select: function(target, x, y) {
			curtext = target;
			textActions.toEditMode(x, y);
		},
		start: function(elem) {
			curtext = elem;
			textActions.toEditMode();
		},
		mouseDown: function(evt, mouse_target, start_x, start_y) {
			var pt = screenToPt(start_x, start_y);
		
			textinput.focus();
			setCursorFromPoint(pt.x, pt.y);
			last_x = start_x;
			last_y = start_y;
			
			// TODO: Find way to block native selection
		},
		mouseMove: function(mouse_x, mouse_y) {
			var pt = screenToPt(mouse_x, mouse_y);
			setEndSelectionFromPoint(pt.x, pt.y);
		},			
		mouseUp: function(evt, mouse_x, mouse_y) {
			var pt = screenToPt(mouse_x, mouse_y);
			
			setEndSelectionFromPoint(pt.x, pt.y, true);
			
			// TODO: Find a way to make this work: Use transformed BBox instead of evt.target 
//				if (last_x === mouse_x && last_y === mouse_y
//					&& !svgedit.math.rectsIntersect(transbb, {x: pt.x, y: pt.y, width:0, height:0})) {
//					textActions.toSelectMode(true);				
//				}

			if (
				evt.target !== curtext
				&&	mouse_x < last_x + 2
				&& mouse_x > last_x - 2
				&&	mouse_y < last_y + 2
				&& mouse_y > last_y - 2) {

				textActions.toSelectMode(true);
			}

		},
		setCursor: setCursor,
		toEditMode: function(x, y) {
			allow_dbl = false;
			current_mode = 'textedit';
			selectorManager.requestSelector(curtext).showGrips(false);
			// Make selector group accept clicks
			var sel = selectorManager.requestSelector(curtext).selectorRect;
			
			textActions.init();

			$(curtext).css('cursor', 'text');
			
//				if (svgedit.browser.supportsEditableText()) {
//					curtext.setAttribute('editable', 'simple');
//					return;
//				}
			
			if (!arguments.length) {
				setCursor();
			} else {
				var pt = screenToPt(x, y);
				setCursorFromPoint(pt.x, pt.y);
			}
			
			setTimeout(function() {
				allow_dbl = true;
			}, 300);
		},
		toSelectMode: function(selectElem) {
			current_mode = 'select';
			clearInterval(blinker);
			blinker = null;
			if (selblock) {$(selblock).attr('display', 'none');}
			if (cursor) {$(cursor).attr('visibility', 'hidden');}
			$(curtext).css('cursor', 'move');
			
			if (selectElem) {
				clearSelection();
				$(curtext).css('cursor', 'move');
				
				call('selected', [curtext]);
				addToSelection([curtext], true);
			}
			if (curtext && !curtext.textContent.length) {
				// No content, so delete
				canvas.deleteSelectedElements();
			}
			
			$(textinput).blur();
			
			curtext = false;
			
//				if (svgedit.browser.supportsEditableText()) {
//					curtext.removeAttribute('editable');
//				}
		},
		setInputElem: function(elem) {
			textinput = elem;
//			$(textinput).blur(hideCursor);
		},
		clear: function() {
			if (current_mode == 'textedit') {
				textActions.toSelectMode();
			}
		},
		init: function(inputElem) {
			if (!curtext) {return;}
			var i, end;
//				if (svgedit.browser.supportsEditableText()) {
//					curtext.select();
//					return;
//				}
		
			if (!curtext.parentNode) {
				// Result of the ffClone, need to get correct element
				curtext = selectedElements[0];
				selectorManager.requestSelector(curtext).showGrips(false);
			}
			
			var str = curtext.textContent;
			var len = str.length;
			
			var xform = curtext.getAttribute('transform');

			textbb = svgedit.utilities.getBBox(curtext);
			
			matrix = xform ? svgedit.math.getMatrix(curtext) : null;

			chardata = [];
			chardata.length = len;
			textinput.focus();
			
			$(curtext).unbind('dblclick', selectWord).dblclick(selectWord);
			
			if (!len) {
				end = {x: textbb.x + (textbb.width/2), width: 0};
			}
			
			for (i=0; i<len; i++) {
				var start = curtext.getStartPositionOfChar(i);
				end = curtext.getEndPositionOfChar(i);
				
				if (!svgedit.browser.supportsGoodTextCharPos()) {
					var offset = canvas.contentW * current_zoom;
					start.x -= offset;
					end.x -= offset;
					
					start.x /= current_zoom;
					end.x /= current_zoom;
				}
				
				// Get a "bbox" equivalent for each character. Uses the
				// bbox data of the actual text for y, height purposes
				
				// TODO: Decide if y, width and height are actually necessary
				chardata[i] = {
					x: start.x,
					y: textbb.y, // start.y?
					width: end.x - start.x,
					height: textbb.height
				};
			}
			
			// Add a last bbox for cursor at end of text
			chardata.push({
				x: end.x,
				width: 0
			});
			setSelection(textinput.selectionStart, textinput.selectionEnd, true);
		}
	};
}());

// TODO: Migrate all of this code into path.js
// Group: Path edit functions
// Functions relating to editing path elements
pathActions = canvas.pathActions = function() {
	
	var subpath = false;
	var current_path;
	var newPoint, firstCtrl;
	
	function resetD(p) {
		p.setAttribute('d', pathActions.convertPath(p));
	}

	// TODO: Move into path.js
	svgedit.path.Path.prototype.endChanges = function(text) {
		if (svgedit.browser.isWebkit()) {resetD(this.elem);}
		var cmd = new svgedit.history.ChangeElementCommand(this.elem, {d: this.last_d}, text);
		addCommandToHistory(cmd);
		call('changed', [this.elem]);
	};

	svgedit.path.Path.prototype.addPtsToSelection = function(indexes) {
		var i, seg;
		if (!$.isArray(indexes)) {indexes = [indexes];}
		for (i = 0; i< indexes.length; i++) {
			var index = indexes[i];
			seg = this.segs[index];
			if (seg.ptgrip) {
				if (this.selected_pts.indexOf(index) == -1 && index >= 0) {
					this.selected_pts.push(index);
				}
			}
		}
		this.selected_pts.sort();
		i = this.selected_pts.length;
		var grips = [];
		grips.length = i;
		// Loop through points to be selected and highlight each
		while (i--) {
			var pt = this.selected_pts[i];
			seg = this.segs[pt];
			seg.select(true);
			grips[i] = seg.ptgrip;
		}
		// TODO: Correct this:
		pathActions.canDeleteNodes = true;
		
		pathActions.closed_subpath = this.subpathIsClosed(this.selected_pts[0]);
		
		call('selected', grips);
	};

	current_path = null;
	var drawn_path = null,
		hasMoved = false;
	
	// This function converts a polyline (created by the fh_path tool) into
	// a path element and coverts every three line segments into a single bezier
	// curve in an attempt to smooth out the free-hand
	var smoothPolylineIntoPath = function(element) {
		var i, points = element.points;
		var N = points.numberOfItems;
		if (N >= 4) {
			// loop through every 3 points and convert to a cubic bezier curve segment
			// 
			// NOTE: this is cheating, it means that every 3 points has the potential to 
			// be a corner instead of treating each point in an equal manner. In general,
			// this technique does not look that good.
			// 
			// I am open to better ideas!
			// 
			// Reading:
			// - http://www.efg2.com/Lab/Graphics/Jean-YvesQueinecBezierCurves.htm
			// - http://www.codeproject.com/KB/graphics/BezierSpline.aspx?msg=2956963
			// - http://www.ian-ko.com/ET_GeoWizards/UserGuide/smooth.htm
			// - http://www.cs.mtu.edu/~shene/COURSES/cs3621/NOTES/spline/Bezier/bezier-der.html
			var curpos = points.getItem(0), prevCtlPt = null;
			var d = [];
			d.push(['M', curpos.x, ',', curpos.y, ' C'].join(''));
			for (i = 1; i <= (N-4); i += 3) {
				var ct1 = points.getItem(i);
				var ct2 = points.getItem(i+1);
				var end = points.getItem(i+2);
				
				// if the previous segment had a control point, we want to smooth out
				// the control points on both sides
				if (prevCtlPt) {
					var newpts = svgedit.path.smoothControlPoints( prevCtlPt, ct1, curpos );
					if (newpts && newpts.length == 2) {
						var prevArr = d[d.length-1].split(',');
						prevArr[2] = newpts[0].x;
						prevArr[3] = newpts[0].y;
						d[d.length-1] = prevArr.join(',');
						ct1 = newpts[1];
					}
				}
				
				d.push([ct1.x, ct1.y, ct2.x, ct2.y, end.x, end.y].join(','));
				
				curpos = end;
				prevCtlPt = ct2;
			}
			// handle remaining line segments
			d.push('L');
			while (i < N) {
				var pt = points.getItem(i);
				d.push([pt.x, pt.y].join(','));
				i++;
			}
			d = d.join(' ');

			// create new path element
			element = addSvgElementFromJson({
				element: 'path',
				curStyles: true,
				attr: {
					id: getId(),
					d: d,
					fill: 'none'
				}
			});
			// No need to call "changed", as this is already done under mouseUp
		}
		return element;
	};

	return {
		mouseDown: function(evt, mouse_target, start_x, start_y) {
			var id;
			if (current_mode === 'path') {
				mouse_x = start_x;
				mouse_y = start_y;
				
				var x = mouse_x/current_zoom,
					y = mouse_y/current_zoom,
					stretchy = svgedit.utilities.getElem('path_stretch_line');
				newPoint = [x, y];	
				
				if (curConfig.gridSnapping){
					x = svgedit.utilities.snapToGrid(x);
					y = svgedit.utilities.snapToGrid(y);
					mouse_x = svgedit.utilities.snapToGrid(mouse_x);
					mouse_y = svgedit.utilities.snapToGrid(mouse_y);
				}

				if (!stretchy) {
					stretchy = document.createElementNS(NS.SVG, 'path');
					svgedit.utilities.assignAttributes(stretchy, {
						id: 'path_stretch_line',
						stroke: '#22C',
						'stroke-width': '0.5',
						fill: 'none'
					});
					stretchy = svgedit.utilities.getElem('selectorParentGroup').appendChild(stretchy);
				}
				stretchy.setAttribute('display', 'inline');
				
				var keep = null;
				var index;
				// if pts array is empty, create path element with M at current point
				if (!drawn_path) {
					d_attr = 'M' + x + ',' + y + ' ';
					drawn_path = addSvgElementFromJson({
						element: 'path',
						curStyles: true,
						attr: {
							d: d_attr,
							id: getNextId(),
							opacity: cur_shape.opacity / 2
						}
					});
					// set stretchy line to first point
					stretchy.setAttribute('d', ['M', mouse_x, mouse_y, mouse_x, mouse_y].join(' '));
					index = subpath ? svgedit.path.path.segs.length : 0;
					svgedit.path.addPointGrip(index, mouse_x, mouse_y);
				} else {
					// determine if we clicked on an existing point
					var seglist = drawn_path.pathSegList;
					var i = seglist.numberOfItems;
					var FUZZ = 6/current_zoom;
					var clickOnPoint = false;
					while (i) {
						i --;
						var item = seglist.getItem(i);
						var px = item.x, py = item.y;
						// found a matching point
						if ( x >= (px-FUZZ) && x <= (px+FUZZ) && y >= (py-FUZZ) && y <= (py+FUZZ) ) {
							clickOnPoint = true;
							break;
						}
					}
					
					// get path element that we are in the process of creating
					id = getId();
				
					// Remove previous path object if previously created
					svgedit.path.removePath_(id);
					
					var newpath = svgedit.utilities.getElem(id);
					var newseg;
					var s_seg;
					var len = seglist.numberOfItems;
					// if we clicked on an existing point, then we are done this path, commit it
					// (i, i+1) are the x,y that were clicked on
					if (clickOnPoint) {
						// if clicked on any other point but the first OR
						// the first point was clicked on and there are less than 3 points
						// then leave the path open
						// otherwise, close the path
						if (i <= 1 && len >= 2) {
							// Create end segment
							var abs_x = seglist.getItem(0).x;
							var abs_y = seglist.getItem(0).y;
							

							s_seg = stretchy.pathSegList.getItem(1);
							if (s_seg.pathSegType === 4) {
								newseg = drawn_path.createSVGPathSegLinetoAbs(abs_x, abs_y);
							} else {
								newseg = drawn_path.createSVGPathSegCurvetoCubicAbs(
									abs_x,
									abs_y,
									s_seg.x1 / current_zoom,
									s_seg.y1 / current_zoom,
									abs_x,
									abs_y
								);
							}
							
							var endseg = drawn_path.createSVGPathSegClosePath();
							seglist.appendItem(newseg);
							seglist.appendItem(endseg);
						} else if (len < 3) {
							keep = false;
							return keep;
						}
						$(stretchy).remove();
						
						// This will signal to commit the path
						element = newpath;
						drawn_path = null;
						started = false;
						
						if (subpath) {
							if (svgedit.path.path.matrix) {
								svgedit.coords.remapElement(newpath, {}, svgedit.path.path.matrix.inverse());
							}
						
							var new_d = newpath.getAttribute('d');
							var orig_d = $(svgedit.path.path.elem).attr('d');
							$(svgedit.path.path.elem).attr('d', orig_d + new_d);
							$(newpath).remove();
							if (svgedit.path.path.matrix) {
								svgedit.path.recalcRotatedPath();
							}
							svgedit.path.path.init();
							pathActions.toEditMode(svgedit.path.path.elem);
							svgedit.path.path.selectPt();
							return false;
						}
					}
					// else, create a new point, update path element
					else {
						// Checks if current target or parents are #svgcontent
						if (!$.contains(container, getMouseTarget(evt))) {
							// Clicked outside canvas, so don't make point
							console.log('Clicked outside canvas');
							return false;
						}

						var num = drawn_path.pathSegList.numberOfItems;
						var last = drawn_path.pathSegList.getItem(num -1);
						var lastx = last.x, lasty = last.y;

						if (evt.shiftKey) {
							var xya = svgedit.math.snapToAngle(lastx, lasty, x, y);
							x = xya.x;
							y = xya.y;
						}
						
						// Use the segment defined by stretchy
						s_seg = stretchy.pathSegList.getItem(1);
						if (s_seg.pathSegType === 4) {
							newseg = drawn_path.createSVGPathSegLinetoAbs(round(x), round(y));
						} else {
							newseg = drawn_path.createSVGPathSegCurvetoCubicAbs(
								round(x),
								round(y),
								s_seg.x1 / current_zoom,
								s_seg.y1 / current_zoom,
								s_seg.x2 / current_zoom,
								s_seg.y2 / current_zoom
							);
						}
						
						drawn_path.pathSegList.appendItem(newseg);
						
						x *= current_zoom;
						y *= current_zoom;
						
						// set stretchy line to latest point
						stretchy.setAttribute('d', ['M', x, y, x, y].join(' '));
						index = num;
						if (subpath) {index += svgedit.path.path.segs.length;}
						svgedit.path.addPointGrip(index, x, y);
					}
//					keep = true;
				}
				
				return;
			}
			
			// TODO: Make sure current_path isn't null at this point
			if (!svgedit.path.path) {return;}
			
			svgedit.path.path.storeD();
			
			id = evt.target.id;
			var cur_pt;
			if (id.substr(0,14) == 'pathpointgrip_') {
				// Select this point
				cur_pt = svgedit.path.path.cur_pt = parseInt(id.substr(14));
				svgedit.path.path.dragging = [start_x, start_y];
				var seg = svgedit.path.path.segs[cur_pt];
				
				// only clear selection if shift is not pressed (otherwise, add 
				// node to selection)
				if (!evt.shiftKey) {
					if (svgedit.path.path.selected_pts.length <= 1 || !seg.selected) {
						svgedit.path.path.clearSelection();
					}
					svgedit.path.path.addPtsToSelection(cur_pt);
				} else if (seg.selected) {
					svgedit.path.path.removePtFromSelection(cur_pt);
				} else {
					svgedit.path.path.addPtsToSelection(cur_pt);
				}
			} else if (id.indexOf('ctrlpointgrip_') == 0) {
				svgedit.path.path.dragging = [start_x, start_y];
				
				var parts = id.split('_')[1].split('c');
				cur_pt = Number(parts[0]);
				var ctrl_num = Number(parts[1]);
				svgedit.path.path.selectPt(cur_pt, ctrl_num);
			}

			// Start selection box
			if (!svgedit.path.path.dragging) {
				if (rubberBox == null) {
					rubberBox = selectorManager.getRubberBandBox();
				}
				svgedit.utilities.assignAttributes(rubberBox, {
						'x': start_x * current_zoom,
						'y': start_y * current_zoom,
						'width': 0,
						'height': 0,
						'display': 'inline'
				}, 100);
			}
		},
		mouseMove: function(mouse_x, mouse_y) {
			hasMoved = true;
			if (current_mode === 'path') {
				if (!drawn_path) {return;}
				var seglist = drawn_path.pathSegList;
				var index = seglist.numberOfItems - 1;

				if (newPoint) {
					// First point
//					if (!index) {return;}

					// Set control points
					var pointGrip1 = svgedit.path.addCtrlGrip('1c1');
					var pointGrip2 = svgedit.path.addCtrlGrip('0c2');
					
					// dragging pointGrip1
					pointGrip1.setAttribute('cx', mouse_x);
					pointGrip1.setAttribute('cy', mouse_y);
					pointGrip1.setAttribute('display', 'inline');

					var pt_x = newPoint[0];
					var pt_y = newPoint[1];
					
					// set curve
					var seg = seglist.getItem(index);
					var cur_x = mouse_x / current_zoom;
					var cur_y = mouse_y / current_zoom;
					var alt_x = (pt_x + (pt_x - cur_x));
					var alt_y = (pt_y + (pt_y - cur_y));
					
					pointGrip2.setAttribute('cx', alt_x * current_zoom);
					pointGrip2.setAttribute('cy', alt_y * current_zoom);
					pointGrip2.setAttribute('display', 'inline');
					
					var ctrlLine = svgedit.path.getCtrlLine(1);
					svgedit.utilities.assignAttributes(ctrlLine, {
						x1: mouse_x,
						y1: mouse_y,
						x2: alt_x * current_zoom,
						y2: alt_y * current_zoom,
						display: 'inline'
					});

					if (index === 0) {
						firstCtrl = [mouse_x, mouse_y];
					} else {
						var last = seglist.getItem(index - 1);
						var last_x = last.x;
						var last_y = last.y;
	
						if (last.pathSegType === 6) {
							last_x += (last_x - last.x2);
							last_y += (last_y - last.y2);
						} else if (firstCtrl) {
							last_x = firstCtrl[0]/current_zoom;
							last_y = firstCtrl[1]/current_zoom;
						}
						svgedit.path.replacePathSeg(6, index, [pt_x, pt_y, last_x, last_y, alt_x, alt_y], drawn_path);
					}
				} else {
					var stretchy = svgedit.utilities.getElem('path_stretch_line');
					if (stretchy) {
						var prev = seglist.getItem(index);
						if (prev.pathSegType === 6) {
							var prev_x = prev.x + (prev.x - prev.x2);
							var prev_y = prev.y + (prev.y - prev.y2);
							svgedit.path.replacePathSeg(6, 1, [mouse_x, mouse_y, prev_x * current_zoom, prev_y * current_zoom, mouse_x, mouse_y], stretchy);							
						} else if (firstCtrl) {
							svgedit.path.replacePathSeg(6, 1, [mouse_x, mouse_y, firstCtrl[0], firstCtrl[1], mouse_x, mouse_y], stretchy);
						} else {
							svgedit.path.replacePathSeg(4, 1, [mouse_x, mouse_y], stretchy);
						}
					}
				}
				return;
			}
			// if we are dragging a point, let's move it
			if (svgedit.path.path.dragging) {
				var pt = svgedit.path.getPointFromGrip({
					x: svgedit.path.path.dragging[0],
					y: svgedit.path.path.dragging[1]
				}, svgedit.path.path);
				var mpt = svgedit.path.getPointFromGrip({
					x: mouse_x,
					y: mouse_y
				}, svgedit.path.path);
				var diff_x = mpt.x - pt.x;
				var diff_y = mpt.y - pt.y;
				svgedit.path.path.dragging = [mouse_x, mouse_y];
				
				if (svgedit.path.path.dragctrl) {
					svgedit.path.path.moveCtrl(diff_x, diff_y);
				} else {
					svgedit.path.path.movePts(diff_x, diff_y);
				}
			} else {
				svgedit.path.path.selected_pts = [];
				svgedit.path.path.eachSeg(function(i) {
					var seg = this;
					if (!seg.next && !seg.prev) {return;}
						
					var item = seg.item;
					var rbb = rubberBox.getBBox();
					
					var pt = svgedit.path.getGripPt(seg);
					var pt_bb = {
						x: pt.x,
						y: pt.y,
						width: 0,
						height: 0
					};
				
					var sel = svgedit.math.rectsIntersect(rbb, pt_bb);

					this.select(sel);
					//Note that addPtsToSelection is not being run
					if (sel) {svgedit.path.path.selected_pts.push(seg.index);}
				});

			}
		}, 
		mouseUp: function(evt, element, mouse_x, mouse_y) {
			
			// Create mode
			if (current_mode === 'path') {
				newPoint = null;
				if (!drawn_path) {
					element = svgedit.utilities.getElem(getId());
					started = false;
					firstCtrl = null;
				}

				return {
					keep: true,
					element: element
				};
			}
			
			// Edit mode
			
			if (svgedit.path.path.dragging) {
				var last_pt = svgedit.path.path.cur_pt;

				svgedit.path.path.dragging = false;
				svgedit.path.path.dragctrl = false;
				svgedit.path.path.update();
				
				if (hasMoved) {
					svgedit.path.path.endChanges('Move path point(s)');
				} 
				
				if (!evt.shiftKey && !hasMoved) {
					svgedit.path.path.selectPt(last_pt);
				} 
			} else if (rubberBox && rubberBox.getAttribute('display') != 'none') {
				// Done with multi-node-select
				rubberBox.setAttribute('display', 'none');
				
				if (rubberBox.getAttribute('width') <= 2 && rubberBox.getAttribute('height') <= 2) {
					pathActions.toSelectMode(evt.target);
				}
				
			// else, move back to select mode	
			} else {
				pathActions.toSelectMode(evt.target);
			}
			hasMoved = false;
		},
		toEditMode: function(element) {
			svgedit.path.path = svgedit.path.getPath_(element);
			current_mode = 'pathedit';
			clearSelection();
			svgedit.path.path.show(true).update();
			svgedit.path.path.oldbbox = svgedit.utilities.getBBox(svgedit.path.path.elem);
			subpath = false;
		},
		toSelectMode: function(elem) {
			var selPath = (elem == svgedit.path.path.elem);
			current_mode = 'select';
			svgedit.path.path.show(false);
			current_path = false;
			clearSelection();
			
			if (svgedit.path.path.matrix) {
				// Rotated, so may need to re-calculate the center
				svgedit.path.recalcRotatedPath();
			}
			
			if (selPath) {
				call('selected', [elem]);
				addToSelection([elem], true);
			}
		},
		addSubPath: function(on) {
			if (on) {
				// Internally we go into "path" mode, but in the UI it will
				// still appear as if in "pathedit" mode.
				current_mode = 'path';
				subpath = true;
			} else {
				pathActions.clear(true);
				pathActions.toEditMode(svgedit.path.path.elem);
			}
		},
		select: function(target) {
			if (current_path === target) {
				pathActions.toEditMode(target);
				current_mode = 'pathedit';
			} // going into pathedit mode
			else {
				current_path = target;
			}	
		},
		reorient: function() {
			var elem = selectedElements[0];
			if (!elem) {return;}
			var angle = svgedit.utilities.getRotationAngle(elem);
			if (angle == 0) {return;}
			
			var batchCmd = new svgedit.history.BatchCommand('Reorient path');
			var changes = {
				d: elem.getAttribute('d'),
				transform: elem.getAttribute('transform')
			};
			batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, changes));
			clearSelection();
			this.resetOrientation(elem);
			
			addCommandToHistory(batchCmd);

			// Set matrix to null
			svgedit.path.getPath_(elem).show(false).matrix = null; 

			this.clear();
	
			addToSelection([elem], true);
			call('changed', selectedElements);
		},
		
		clear: function(remove) {
			current_path = null;
			if (drawn_path) {
				var elem = svgedit.utilities.getElem(getId());
				$(svgedit.utilities.getElem('path_stretch_line')).remove();
				$(elem).remove();
				$(svgedit.utilities.getElem('pathpointgrip_container')).find('*').attr('display', 'none');
				drawn_path = firstCtrl = null;
				started = false;
			} else if (current_mode == 'pathedit') {
				this.toSelectMode();
			}
			if (svgedit.path.path) {svgedit.path.path.init().show(false);}
		},
		resetOrientation: function(path) {
			if (path == null || path.nodeName != 'path') {return false;}
			var tlist = svgedit.transformlist.getTransformList(path);
			var m = svgedit.math.transformListToTransform(tlist).matrix;
			tlist.clear();
			path.removeAttribute('transform');
			var segList = path.pathSegList;
			
			// Opera/win/non-EN throws an error here.
			// TODO: Find out why!
			// Presumed fixed in Opera 10.5, so commented out for now
			
//			try {
				var len = segList.numberOfItems;
//			} catch(err) {
//				var fixed_d = pathActions.convertPath(path);
//				path.setAttribute('d', fixed_d);
//				segList = path.pathSegList;
//				var len = segList.numberOfItems;
//			}
			var i, last_x, last_y;

			for (i = 0; i < len; ++i) {
				var seg = segList.getItem(i);
				var type = seg.pathSegType;
				if (type == 1) {continue;}
				var pts = [];
				$.each(['',1,2], function(j, n) {
					var x = seg['x'+n], y = seg['y'+n];
					if (x !== undefined && y !== undefined) {
						var pt = svgedit.math.transformPoint(x, y, m);
						pts.splice(pts.length, 0, pt.x, pt.y);
					}
				});
				svgedit.path.replacePathSeg(type, i, pts, path);
			}
			
			reorientGrads(path, m);
		},
		zoomChange: function() {
			if (current_mode == 'pathedit') {
				svgedit.path.path.update();
			}
		},
		getNodePoint: function() {
			var sel_pt = svgedit.path.path.selected_pts.length ? svgedit.path.path.selected_pts[0] : 1;

			var seg = svgedit.path.path.segs[sel_pt];
			return {
				x: seg.item.x,
				y: seg.item.y,
				type: seg.type
			};
		}, 
		linkControlPoints: function(linkPoints) {
			svgedit.path.setLinkControlPoints(linkPoints);
		},
		clonePathNode: function() {
			svgedit.path.path.storeD();
			
			var sel_pts = svgedit.path.path.selected_pts;
			var segs = svgedit.path.path.segs;
			
			var i = sel_pts.length;
			var nums = [];

			while (i--) {
				var pt = sel_pts[i];
				svgedit.path.path.addSeg(pt);
				
				nums.push(pt + i);
				nums.push(pt + i + 1);
			}
			svgedit.path.path.init().addPtsToSelection(nums);

			svgedit.path.path.endChanges('Clone path node(s)');
		},
		opencloseSubPath: function() {
			var sel_pts = svgedit.path.path.selected_pts;
			// Only allow one selected node for now
			if (sel_pts.length !== 1) {return;}
			
			var elem = svgedit.path.path.elem;
			var list = elem.pathSegList;

			var len = list.numberOfItems;

			var index = sel_pts[0];
			
			var open_pt = null;
			var start_item = null;

			// Check if subpath is already open
			svgedit.path.path.eachSeg(function(i) {
				if (this.type === 2 && i <= index) {
					start_item = this.item;
				}
				if (i <= index) {return true;}
				if (this.type === 2) {
					// Found M first, so open
					open_pt = i;
					return false;
				}
				if (this.type === 1) {
					// Found Z first, so closed
					open_pt = false;
					return false;
				}
			});
			
			if (open_pt == null) {
				// Single path, so close last seg
				open_pt = svgedit.path.path.segs.length - 1;
			}

			if (open_pt !== false) {
				// Close this path
				
				// Create a line going to the previous "M"
				var newseg = elem.createSVGPathSegLinetoAbs(start_item.x, start_item.y);
			
				var closer = elem.createSVGPathSegClosePath();
				if (open_pt == svgedit.path.path.segs.length - 1) {
					list.appendItem(newseg);
					list.appendItem(closer);
				} else {
					svgedit.path.insertItemBefore(elem, closer, open_pt);
					svgedit.path.insertItemBefore(elem, newseg, open_pt);
				}
				
				svgedit.path.path.init().selectPt(open_pt+1);
				return;
			}
			
			// M 1,1 L 2,2 L 3,3 L 1,1 z // open at 2,2
			// M 2,2 L 3,3 L 1,1
			
			// M 1,1 L 2,2 L 1,1 z M 4,4 L 5,5 L6,6 L 5,5 z 
			// M 1,1 L 2,2 L 1,1 z [M 4,4] L 5,5 L(M)6,6 L 5,5 z 
			
			var seg = svgedit.path.path.segs[index];
			
			if (seg.mate) {
				list.removeItem(index); // Removes last "L"
				list.removeItem(index); // Removes the "Z"
				svgedit.path.path.init().selectPt(index - 1);
				return;
			}
			
			var i, last_m, z_seg;
			
			// Find this sub-path's closing point and remove
			for (i = 0; i<list.numberOfItems; i++) {
				var item = list.getItem(i);

				if (item.pathSegType === 2) {
					// Find the preceding M
					last_m = i;
				} else if (i === index) {
					// Remove it
					list.removeItem(last_m);
//						index--;
				} else if (item.pathSegType === 1 && index < i) {
					// Remove the closing seg of this subpath
					z_seg = i-1;
					list.removeItem(i);
					break;
				}
			}
			
			var num = (index - last_m) - 1;
			
			while (num--) {
				svgedit.path.insertItemBefore(elem, list.getItem(last_m), z_seg);
			}
			
			var pt = list.getItem(last_m);
			
			// Make this point the new "M"
			svgedit.path.replacePathSeg(2, last_m, [pt.x, pt.y]);
			
			i = index; // i is local here, so has no effect; what is the reason for this?
			
			svgedit.path.path.init().selectPt(0);
		},
		deletePathNode: function() {
			if (!pathActions.canDeleteNodes) {return;}
			svgedit.path.path.storeD();
			
			var sel_pts = svgedit.path.path.selected_pts;
			var i = sel_pts.length;

			while (i--) {
				var pt = sel_pts[i];
				svgedit.path.path.deleteSeg(pt);
			}
			
			// Cleanup
			var cleanup = function() {
				var segList = svgedit.path.path.elem.pathSegList;
				var len = segList.numberOfItems;
				
				var remItems = function(pos, count) {
					while (count--) {
						segList.removeItem(pos);
					}
				};

				if (len <= 1) {return true;}
				
				while (len--) {
					var item = segList.getItem(len);
					if (item.pathSegType === 1) {
						var prev = segList.getItem(len-1);
						var nprev = segList.getItem(len-2);
						if (prev.pathSegType === 2) {
							remItems(len-1, 2);
							cleanup();
							break;
						} else if (nprev.pathSegType === 2) {
							remItems(len-2, 3);
							cleanup();
							break;
						}

					} else if (item.pathSegType === 2) {
						if (len > 0) {
							var prev_type = segList.getItem(len-1).pathSegType;
							// Path has M M
							if (prev_type === 2) {
								remItems(len-1, 1);
								cleanup();
								break;
							// Entire path ends with Z M 
							} else if (prev_type === 1 && segList.numberOfItems-1 === len) {
								remItems(len, 1);
								cleanup();
								break;
							}
						}
					}
				}	
				return false;
			};
			
			cleanup();
			
			// Completely delete a path with 1 or 0 segments
			if (svgedit.path.path.elem.pathSegList.numberOfItems <= 1) {
				pathActions.toSelectMode(svgedit.path.path.elem);
				canvas.deleteSelectedElements();
				return;
			}
			
			svgedit.path.path.init();
			svgedit.path.path.clearSelection();
			
			// TODO: Find right way to select point now
			// path.selectPt(sel_pt);
			if (window.opera) { // Opera repaints incorrectly
				var cp = $(svgedit.path.path.elem); 
				cp.attr('d', cp.attr('d'));
			}
			svgedit.path.path.endChanges('Delete path node(s)');
		},
		smoothPolylineIntoPath: smoothPolylineIntoPath,
		setSegType: function(v) {
			svgedit.path.path.setSegType(v);
		},
		moveNode: function(attr, newValue) {
			var sel_pts = svgedit.path.path.selected_pts;
			if (!sel_pts.length) {return;}
			
			svgedit.path.path.storeD();
			
			// Get first selected point
			var seg = svgedit.path.path.segs[sel_pts[0]];
			var diff = {x:0, y:0};
			diff[attr] = newValue - seg.item[attr];
			
			seg.move(diff.x, diff.y);
			svgedit.path.path.endChanges('Move path point');
		},
		fixEnd: function(elem) {
			// Adds an extra segment if the last seg before a Z doesn't end
			// at its M point
			// M0,0 L0,100 L100,100 z
			var segList = elem.pathSegList;
			var len = segList.numberOfItems;
			var i, last_m;
			for (i = 0; i < len; ++i) {
				var item = segList.getItem(i);
				if (item.pathSegType === 2) {
					last_m = item;
				}
				
				if (item.pathSegType === 1) {
					var prev = segList.getItem(i-1);
					if (prev.x != last_m.x || prev.y != last_m.y) {
						// Add an L segment here
						var newseg = elem.createSVGPathSegLinetoAbs(last_m.x, last_m.y);
						svgedit.path.insertItemBefore(elem, newseg, i);
						// Can this be done better?
						pathActions.fixEnd(elem);
						break;
					}
					
				}
			}
			if (svgedit.browser.isWebkit()) {resetD(elem);}
		},
		// Convert a path to one with only absolute or relative values
		convertPath: svgedit.utilities.convertPath
	};
}();
// end pathActions

// Group: Serialization

// Function: removeUnusedDefElems
// Looks at DOM elements inside the <defs> to see if they are referred to,
// removes them from the DOM if they are not.
// 
// Returns:
// The amount of elements that were removed
var removeUnusedDefElems = this.removeUnusedDefElems = function() {
	var defs = svgcontent.getElementsByTagNameNS(NS.SVG, 'defs');
	if (!defs || !defs.length) {return 0;}
	
//	if (!defs.firstChild) {return;}
	
	var defelem_uses = [],
		numRemoved = 0;
	var attrs = ['fill', 'stroke', 'filter', 'marker-start', 'marker-mid', 'marker-end'];
	var alen = attrs.length;
	
	var all_els = svgcontent.getElementsByTagNameNS(NS.SVG, '*');
	var all_len = all_els.length;
	
	var i, j;
	for (i = 0; i < all_len; i++) {
		var el = all_els[i];
		for (j = 0; j < alen; j++) {
			var ref = svgedit.utilities.getUrlFromAttr(el.getAttribute(attrs[j]));
			if (ref) {
				defelem_uses.push(ref.substr(1));
			}
		}
		
		// gradients can refer to other gradients
		var href = getHref(el);
		if (href && href.indexOf('#') === 0) {
			defelem_uses.push(href.substr(1));
		}
	}
	
	var defelems = $(defs).find('linearGradient, radialGradient, filter, marker, svg, symbol');
	i = defelems.length;
	while (i--) {
		var defelem = defelems[i];
		var id = defelem.id;
		if (defelem_uses.indexOf(id) < 0) {
			// Not found, so remove (but remember)
			removedElements[id] = defelem;
			defelem.parentNode.removeChild(defelem);
			numRemoved++;
		}
	}

	return numRemoved;
};

// Function: svgCanvasToString
// Main function to set up the SVG content for output 
//
// Returns: 
// String containing the SVG image for output
this.svgCanvasToString = function() {
	// keep calling it until there are none to remove
	while (removeUnusedDefElems() > 0) {}
	
	pathActions.clear(true);
	
	// Keep SVG-Edit comment on top
	$.each(svgcontent.childNodes, function(i, node) {
		if (i && node.nodeType === 8 && node.data.indexOf('Created with') >= 0) {
			svgcontent.insertBefore(node, svgcontent.firstChild);
		}
	});
	
	// Move out of in-group editing mode
	if (current_group) {
		leaveContext();
		selectOnly([current_group]);
	}
	
	var naked_svgs = [];
	
	// Unwrap gsvg if it has no special attributes (only id and style)
	$(svgcontent).find('g:data(gsvg)').each(function() {
		var attrs = this.attributes;
		var len = attrs.length;
		var i;
		for (i = 0; i < len; i++) {
			if (attrs[i].nodeName == 'id' || attrs[i].nodeName == 'style') {
				len--;
			}
		}
		// No significant attributes, so ungroup
		if (len <= 0) {
			var svg = this.firstChild;
			naked_svgs.push(svg);
			$(this).replaceWith(svg);
		}
	});
	var output = this.svgToString(svgcontent, 0);
	
	// Rewrap gsvg
	if (naked_svgs.length) {
		$(naked_svgs).each(function() {
			groupSvgElem(this);
		});
	}
	
	return output;
};

// Function: svgToString
// Sub function ran on each SVG element to convert it to a string as desired
// 
// Parameters: 
// elem - The SVG element to convert
// indent - Integer with the amount of spaces to indent this tag
//
// Returns: 
// String with the given element as an SVG tag
this.svgToString = function(elem, indent) {
	var out = [], 
		toXml = svgedit.utilities.toXml;
	var unit = curConfig.baseUnit;
	var unit_re = new RegExp('^-?[\\d\\.]+' + unit + '$');

	if (elem) {
		cleanupElement(elem);
		var attrs = elem.attributes,
			attr,
			i,
			childs = elem.childNodes;
		
		for (i = 0; i < indent; i++) {out.push(' ');}
		out.push('<'); out.push(elem.nodeName);
		if (elem.id === 'svgcontent') {
			// Process root element separately
			var res = getResolution();
			
			var vb = '';
			// TODO: Allow this by dividing all values by current baseVal
			// Note that this also means we should properly deal with this on import
//			if (curConfig.baseUnit !== 'px') {
//				var unit = curConfig.baseUnit;
//				var unit_m = svgedit.units.getTypeMap()[unit];
//				res.w = svgedit.units.shortFloat(res.w / unit_m)
//				res.h = svgedit.units.shortFloat(res.h / unit_m)
//				vb = ' viewBox="' + [0, 0, res.w, res.h].join(' ') + '"';
//				res.w += unit;
//				res.h += unit;
//			}
			
			if (unit !== 'px') {
				res.w = svgedit.units.convertUnit(res.w, unit) + unit;
				res.h = svgedit.units.convertUnit(res.h, unit) + unit;
			}
			
			out.push(' width="' + res.w + '" height="' + res.h + '"' + vb + ' xmlns="'+NS.SVG+'"');
			
			var nsuris = {};
			
			// Check elements for namespaces, add if found
			$(elem).find('*').andSelf().each(function() {
				var el = this;
				// for some elements have no attribute
				var uri = this.namespaceURI;
				if(uri && !nsuris[uri] && nsMap[uri] && nsMap[uri] !== 'xmlns' && nsMap[uri] !== 'xml' ) {
					nsuris[uri] = true;
					out.push(' xmlns:' + nsMap[uri] + '="' + uri +'"');
				}
		
				$.each(this.attributes, function(i, attr) {
					var uri = attr.namespaceURI;
					if (uri && !nsuris[uri] && nsMap[uri] !== 'xmlns' && nsMap[uri] !== 'xml' ) {
						nsuris[uri] = true;
						out.push(' xmlns:' + nsMap[uri] + '="' + uri +'"');
					}
				});
			});
			
			i = attrs.length;
			var attr_names = ['width', 'height', 'xmlns', 'x', 'y', 'viewBox', 'id', 'overflow'];
			while (i--) {
				attr = attrs.item(i);
				var attrVal = toXml(attr.value);
				
				// Namespaces have already been dealt with, so skip
				if (attr.nodeName.indexOf('xmlns:') === 0) {continue;}

				// only serialize attributes we don't use internally
				if (attrVal != '' && attr_names.indexOf(attr.localName) == -1) {

					if (!attr.namespaceURI || nsMap[attr.namespaceURI]) {
						out.push(' '); 
						out.push(attr.nodeName); out.push('="');
						out.push(attrVal); out.push('"');
					}
				}
			}
		} else {
			// Skip empty defs
			if (elem.nodeName === 'defs' && !elem.firstChild) {return;}
		
			var moz_attrs = ['-moz-math-font-style', '_moz-math-font-style'];
			for (i = attrs.length - 1; i >= 0; i--) {
				attr = attrs.item(i);
				var attrVal = toXml(attr.value);
				//remove bogus attributes added by Gecko
				if (moz_attrs.indexOf(attr.localName) >= 0) {continue;}
				if (attrVal != '') {
					if (attrVal.indexOf('pointer-events') === 0) {continue;}
					if (attr.localName === 'class' && attrVal.indexOf('se_') === 0) {continue;}
					out.push(' '); 
					if (attr.localName === 'd') {attrVal = pathActions.convertPath(elem, true);}
					if (!isNaN(attrVal)) {
						attrVal = svgedit.units.shortFloat(attrVal);
					} else if (unit_re.test(attrVal)) {
						attrVal = svgedit.units.shortFloat(attrVal) + unit;
					}
					
					// Embed images when saving 
					if (save_options.apply
						&& elem.nodeName === 'image' 
						&& attr.localName === 'href'
						&& save_options.images
						&& save_options.images === 'embed') 
					{
						var img = encodableImages[attrVal];
						if (img) {attrVal = img;}
					}
					
					// map various namespaces to our fixed namespace prefixes
					// (the default xmlns attribute itself does not get a prefix)
					if (!attr.namespaceURI || attr.namespaceURI == NS.SVG || nsMap[attr.namespaceURI]) {
						out.push(attr.nodeName); out.push('="');
						out.push(attrVal); out.push('"');
					}
				}
			}
		}

		if (elem.hasChildNodes()) {
			out.push('>');
			indent++;
			var bOneLine = false;
			
			for (i = 0; i < childs.length; i++) {
				var child = childs.item(i);
				switch(child.nodeType) {
				case 1: // element node
					out.push('\n');
					out.push(this.svgToString(childs.item(i), indent));
					break;
				case 3: // text node
					var str = child.nodeValue.replace(/^\s+|\s+$/g, '');
					if (str != '') {
						bOneLine = true;
						out.push(String(toXml(str)));
					}
					break;
				case 4: // cdata node
					out.push('\n');
					out.push(new Array(indent+1).join(' '));
					out.push('<![CDATA[');
					out.push(child.nodeValue);
					out.push(']]>');
					break;
				case 8: // comment
					out.push('\n');
					out.push(new Array(indent+1).join(' '));
					out.push('<!--');
					out.push(child.data);
					out.push('-->');
					break;
				} // switch on node type
			}
			indent--;
			if (!bOneLine) {
				out.push('\n');
				for (i = 0; i < indent; i++) {out.push(' ');}
			}
			out.push('</'); out.push(elem.nodeName); out.push('>');
		} else {
			out.push('/>');
		}
	}
	return out.join('');
}; // end svgToString()

// Function: embedImage
// Converts a given image file to a data URL when possible, then runs a given callback
//
// Parameters: 
// val - String with the path/URL of the image
// callback - Optional function to run when image data is found, supplies the
// result (data URL or false) as first parameter.
this.embedImage = function(val, callback) {
	// load in the image and once it's loaded, get the dimensions
	$(new Image()).load(function() {
		// create a canvas the same size as the raster image
		var canvas = document.createElement('canvas');
		canvas.width = this.width;
		canvas.height = this.height;
		// load the raster image into the canvas
		canvas.getContext('2d').drawImage(this, 0, 0);
		// retrieve the data: URL
		try {
			var urldata = ';svgedit_url=' + encodeURIComponent(val);
			urldata = canvas.toDataURL().replace(';base64', urldata+';base64');
			encodableImages[val] = urldata;
		} catch(e) {
			encodableImages[val] = false;
		}
		last_good_img_url = val;
		if (callback) {callback(encodableImages[val]);}
	}).attr('src', val);
};

// Function: setGoodImage
// Sets a given URL to be a "last good image" URL
this.setGoodImage = function(val) {
	last_good_img_url = val;
};

this.open = function() {
	// Nothing by default, handled by optional widget/extension
};

// Function: save
// Serializes the current drawing into SVG XML text and returns it to the 'saved' handler.
// This function also includes the XML prolog. Clients of the SvgCanvas bind their save
// function to the 'saved' event.
//
// Returns: 
// Nothing
this.save = function(opts) {
	// remove the selected outline before serializing
	clearSelection();
	// Update save options if provided
	if (opts) {$.extend(save_options, opts);}
	save_options.apply = true;
	
	// no need for doctype, see http://jwatt.org/svg/authoring/#doctype-declaration
	var str = this.svgCanvasToString();
	call('saved', str);
};

function getIssues () {
	// remove the selected outline before serializing
	clearSelection();
	
	// Check for known CanVG issues 
	var issues = [];
	
	// Selector and notice
	var issue_list = {
		'feGaussianBlur': uiStrings.exportNoBlur,
		'foreignObject': uiStrings.exportNoforeignObject,
		'[stroke-dasharray]': uiStrings.exportNoDashArray
	};
	var content = $(svgcontent);
	
	// Add font/text check if Canvas Text API is not implemented
	if (!('font' in $('<canvas>')[0].getContext('2d'))) {
		issue_list.text = uiStrings.exportNoText;
	}
	
	$.each(issue_list, function(sel, descr) {
		if (content.find(sel).length) {
			issues.push(descr);
		}
	});
	return issues;
}

// Function: rasterExport
// Generates a Data URL based on the current image, then calls "exported" 
// with an object including the string, image information, and any issues found
this.rasterExport = function(imgType, quality, exportWindowName) {
	var mimeType = 'image/' + imgType.toLowerCase();
	var issues = getIssues();
	var str = this.svgCanvasToString();
	
	svgedit.utilities.buildCanvgCallback(function () {
		var type = imgType || 'PNG';
		if (!$('#export_canvas').length) {
			$('<canvas>', {id: 'export_canvas'}).hide().appendTo('body');
		}
		var c = $('#export_canvas')[0];
		c.width = svgCanvas.contentW;
		c.height = svgCanvas.contentH;
		
		canvg(c, str, {renderCallback: function() {
			var dataURLType = (type === 'ICO' ? 'BMP' : type).toLowerCase();
			var datauri = quality ? c.toDataURL('image/' + dataURLType, quality) : c.toDataURL('image/' + dataURLType);
			
			call('exported', {datauri: datauri, svg: str, issues: issues, type: imgType, mimeType: mimeType, quality: quality, exportWindowName: exportWindowName});
		}});
	})();
};

this.exportPDF = function (exportWindowName, outputType) {
	var that = this;
	svgedit.utilities.buildJSPDFCallback(function () {
		var res = getResolution();
		var orientation = res.w > res.h ? 'landscape' : 'portrait';
		var units = 'pt'; // curConfig.baseUnit; // We could use baseUnit, but that is presumably not intended for export purposes
		var doc = jsPDF({
			orientation: orientation,
			unit: units,
			format: [res.w, res.h]
			// , compressPdf: true
		}); // Todo: Give options to use predefined jsPDF formats like "a4", etc. from pull-down (with option to keep customizable)
		var docTitle = getDocumentTitle();
		doc.setProperties({
			title: docTitle/*,
			subject: '',
			author: '',
			keywords: '',
			creator: ''*/
		});
		var issues = getIssues();
		var str = that.svgCanvasToString();
		doc.addSVG(str, 0, 0);

		// doc.output('save'); // Works to open in a new
		//  window; todo: configure this and other export
		//  options to optionally work in this manner as
		//  opposed to opening a new tab
		var obj = {svg: str, issues: issues, exportWindowName: exportWindowName};
		var method = outputType || 'dataurlstring';
		obj[method] = doc.output(method);
		call('exportedPDF', obj);
	})();
};

// Function: getSvgString
// Returns the current drawing as raw SVG XML text.
//
// Returns:
// The current drawing as raw SVG XML text.
this.getSvgString = function() {
	save_options.apply = false;
	return this.svgCanvasToString();
};

// Function: randomizeIds
// This function determines whether to use a nonce in the prefix, when
// generating IDs for future documents in SVG-Edit.
// 
// Parameters:
// an optional boolean, which, if true, adds a nonce to the prefix. Thus
// svgCanvas.randomizeIds() <==> svgCanvas.randomizeIds(true)
//
// if you're controlling SVG-Edit externally, and want randomized IDs, call
// this BEFORE calling svgCanvas.setSvgString
//
this.randomizeIds = function(enableRandomization) {
	if (arguments.length > 0 && enableRandomization == false) {
		svgedit.draw.randomizeIds(false, getCurrentDrawing());
	} else {
		svgedit.draw.randomizeIds(true, getCurrentDrawing());
	}
};

// Function: uniquifyElems
// Ensure each element has a unique ID
//
// Parameters:
// g - The parent element of the tree to give unique IDs
var uniquifyElems = this.uniquifyElems = function(g) {
	var ids = {};
	// TODO: Handle markers and connectors. These are not yet re-identified properly
	// as their referring elements do not get remapped.
	//
	// <marker id='se_marker_end_svg_7'/>
	// <polyline id='svg_7' se:connector='svg_1 svg_6' marker-end='url(#se_marker_end_svg_7)'/>
	// 
	// Problem #1: if svg_1 gets renamed, we do not update the polyline's se:connector attribute
	// Problem #2: if the polyline svg_7 gets renamed, we do not update the marker id nor the polyline's marker-end attribute
	var ref_elems = ['filter', 'linearGradient', 'pattern',	'radialGradient', 'symbol', 'textPath', 'use'];
	
	svgedit.utilities.walkTree(g, function(n) {
		// if it's an element node
		if (n.nodeType == 1) {
			// and the element has an ID
			if (n.id) {
				// and we haven't tracked this ID yet
				if (!(n.id in ids)) {
					// add this id to our map
					ids[n.id] = {elem:null, attrs:[], hrefs:[]};
				}
				ids[n.id].elem = n;
			}
			
			// now search for all attributes on this element that might refer
			// to other elements
			$.each(ref_attrs, function(i, attr) {
				var attrnode = n.getAttributeNode(attr);
				if (attrnode) {
					// the incoming file has been sanitized, so we should be able to safely just strip off the leading #
					var url = svgedit.utilities.getUrlFromAttr(attrnode.value),
						refid = url ? url.substr(1) : null;
					if (refid) {
						if (!(refid in ids)) {
							// add this id to our map
							ids[refid] = {elem:null, attrs:[], hrefs:[]};
						}
						ids[refid].attrs.push(attrnode);
					}
				}
			});
			
			// check xlink:href now
			var href = svgedit.utilities.getHref(n);
			// TODO: what if an <image> or <a> element refers to an element internally?
			if (href && ref_elems.indexOf(n.nodeName) >= 0) {
				var refid = href.substr(1);
				if (refid) {
					if (!(refid in ids)) {
						// add this id to our map
						ids[refid] = {elem:null, attrs:[], hrefs:[]};
					}
					ids[refid].hrefs.push(n);
				}
			}						
		}
	});
	
	// in ids, we now have a map of ids, elements and attributes, let's re-identify
	var oldid;
	for (oldid in ids) {
		if (!oldid) {continue;}
		var elem = ids[oldid].elem;
		if (elem) {
			var newid = getNextId();
			
			// assign element its new id
			elem.id = newid;
			
			// remap all url() attributes
			var attrs = ids[oldid].attrs;
			var j = attrs.length;
			while (j--) {
				var attr = attrs[j];
				attr.ownerElement.setAttribute(attr.name, 'url(#' + newid + ')');
			}
			
			// remap all href attributes
			var hreffers = ids[oldid].hrefs;
			var k = hreffers.length;
			while (k--) {
				var hreffer = hreffers[k];
				svgedit.utilities.setHref(hreffer, '#' + newid);
			}
		}
	}
};

// Function setUseData
// Assigns reference data for each use element
var setUseData = this.setUseData = function(parent) {
	var elems = $(parent);
	
	if (parent.tagName !== 'use') {
		elems = elems.find('use');
	}
	
	elems.each(function() {
		var id = getHref(this).substr(1);
		var ref_elem = svgedit.utilities.getElem(id);
		if (!ref_elem) {return;}
		$(this).data('ref', ref_elem);
		if (ref_elem.tagName == 'symbol' || ref_elem.tagName == 'svg') {
			$(this).data('symbol', ref_elem).data('ref', ref_elem);
		}
	});
};

// Function convertGradients
// Converts gradients from userSpaceOnUse to objectBoundingBox
var convertGradients = this.convertGradients = function(elem) {
	var elems = $(elem).find('linearGradient, radialGradient');
	if (!elems.length && svgedit.browser.isWebkit()) {
		// Bug in webkit prevents regular *Gradient selector search
		elems = $(elem).find('*').filter(function() {
			return (this.tagName.indexOf('Gradient') >= 0);
		});
	}
	
	elems.each(function() {
		var grad = this;
		if ($(grad).attr('gradientUnits') === 'userSpaceOnUse') {
			// TODO: Support more than one element with this ref by duplicating parent grad
			var elems = $(svgcontent).find('[fill="url(#' + grad.id + ')"],[stroke="url(#' + grad.id + ')"]');
			if (!elems.length) {return;}
			
			// get object's bounding box
			var bb = svgedit.utilities.getBBox(elems[0]);
			
			// This will occur if the element is inside a <defs> or a <symbol>,
			// in which we shouldn't need to convert anyway.
			if (!bb) {return;}
			
			if (grad.tagName === 'linearGradient') {
				var g_coords = $(grad).attr(['x1', 'y1', 'x2', 'y2']);
				
				// If has transform, convert
				var tlist = grad.gradientTransform.baseVal;
				if (tlist && tlist.numberOfItems > 0) {
					var m = svgedit.math.transformListToTransform(tlist).matrix;
					var pt1 = svgedit.math.transformPoint(g_coords.x1, g_coords.y1, m);
					var pt2 = svgedit.math.transformPoint(g_coords.x2, g_coords.y2, m);
					
					g_coords.x1 = pt1.x;
					g_coords.y1 = pt1.y;
					g_coords.x2 = pt2.x;
					g_coords.y2 = pt2.y;
					grad.removeAttribute('gradientTransform');
				}
				
				$(grad).attr({
					x1: (g_coords.x1 - bb.x) / bb.width,
					y1: (g_coords.y1 - bb.y) / bb.height,
					x2: (g_coords.x2 - bb.x) / bb.width,
					y2: (g_coords.y2 - bb.y) / bb.height
				});
				grad.removeAttribute('gradientUnits');
			}
			// else {
				// Note: radialGradient elements cannot be easily converted 
				// because userSpaceOnUse will keep circular gradients, while
				// objectBoundingBox will x/y scale the gradient according to
				// its bbox. 
				
				// For now we'll do nothing, though we should probably have
				// the gradient be updated as the element is moved, as 
				// inkscape/illustrator do.
			
//						var g_coords = $(grad).attr(['cx', 'cy', 'r']);
//						
//						$(grad).attr({
//							cx: (g_coords.cx - bb.x) / bb.width,
//							cy: (g_coords.cy - bb.y) / bb.height,
//							r: g_coords.r
//						});
//						
//						grad.removeAttribute('gradientUnits');
			// }
		}
	});
};

// Function: convertToGroup
// Converts selected/given <use> or child SVG element to a group
var convertToGroup = this.convertToGroup = function(elem) {
	if (!elem) {
		elem = selectedElements[0];
	}
	var $elem = $(elem);
	var batchCmd = new svgedit.history.BatchCommand();
	var ts;
	
	if ($elem.data('gsvg')) {
		// Use the gsvg as the new group
		var svg = elem.firstChild;
		var pt = $(svg).attr(['x', 'y']);
		
		$(elem.firstChild.firstChild).unwrap();
		$(elem).removeData('gsvg');
		
		var tlist = svgedit.transformlist.getTransformList(elem);
		var xform = svgroot.createSVGTransform();
		xform.setTranslate(pt.x, pt.y);
		tlist.appendItem(xform);
		svgedit.recalculate.recalculateDimensions(elem);
		call('selected', [elem]);
	} else if ($elem.data('symbol')) {
		elem = $elem.data('symbol');
		
		ts = $elem.attr('transform');
		var pos = $elem.attr(['x', 'y']);

		var vb = elem.getAttribute('viewBox');
		
		if (vb) {
			var nums = vb.split(' ');
			pos.x -= +nums[0];
			pos.y -= +nums[1];
		}
		
		// Not ideal, but works
		ts += ' translate(' + (pos.x || 0) + ',' + (pos.y || 0) + ')';
		
		var prev = $elem.prev();
		
		// Remove <use> element
		batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand($elem[0], $elem[0].nextSibling, $elem[0].parentNode));
		$elem.remove();
		
		// See if other elements reference this symbol
		var has_more = $(svgcontent).find('use:data(symbol)').length;
			
		var g = svgdoc.createElementNS(NS.SVG, 'g');
		var childs = elem.childNodes;
		
		var i;
		for (i = 0; i < childs.length; i++) {
			g.appendChild(childs[i].cloneNode(true));
		}
		
		// Duplicate the gradients for Gecko, since they weren't included in the <symbol>
		if (svgedit.browser.isGecko()) {
			var dupeGrads = $(svgedit.utilities.findDefs()).children('linearGradient,radialGradient,pattern').clone();
			$(g).append(dupeGrads);
		}
		
		if (ts) {
			g.setAttribute('transform', ts);
		}
		
		var parent = elem.parentNode;
		
		uniquifyElems(g);
		
		// Put the dupe gradients back into <defs> (after uniquifying them)
		if (svgedit.browser.isGecko()) {
			$(findDefs()).append( $(g).find('linearGradient,radialGradient,pattern') );
		}
	
		// now give the g itself a new id
		g.id = getNextId();
		
		prev.after(g);
		
		if (parent) {
			if (!has_more) {
				// remove symbol/svg element
				var nextSibling = elem.nextSibling;
				parent.removeChild(elem);
				batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(elem, nextSibling, parent));
			}
			batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(g));
		}
		
		setUseData(g);
		
		if (svgedit.browser.isGecko()) {
			convertGradients(svgedit.utilities.findDefs());
		} else {
			convertGradients(g);
		}
		
		// recalculate dimensions on the top-level children so that unnecessary transforms
		// are removed
		svgedit.utilities.walkTreePost(g, function(n){
			try {
				svgedit.recalculate.recalculateDimensions(n);
			} catch(e) {
				console.log(e);
			}
		});
		
		// Give ID for any visible element missing one
		$(g).find(visElems).each(function() {
			if (!this.id) {this.id = getNextId();}
		});
		
		selectOnly([g]);
		
		var cm = pushGroupProperties(g, true);
		if (cm) {
			batchCmd.addSubCommand(cm);
		}

		addCommandToHistory(batchCmd);
		
	} else {
		console.log('Unexpected element to ungroup:', elem);
	}
};

//
// Function: setSvgString
// This function sets the current drawing as the input SVG XML.
//
// Parameters:
// xmlString - The SVG as XML text.
//
// Returns:
// This function returns false if the set was unsuccessful, true otherwise.
this.setSvgString = function(xmlString) {
	try {
		// convert string into XML document
		var newDoc = svgedit.utilities.text2xml(xmlString);

		this.prepareSvg(newDoc);

		var batchCmd = new svgedit.history.BatchCommand('Change Source');

		// remove old svg document
		var nextSibling = svgcontent.nextSibling;
		var oldzoom = svgroot.removeChild(svgcontent);
		batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(oldzoom, nextSibling, svgroot));
	
		// set new svg document
		// If DOM3 adoptNode() available, use it. Otherwise fall back to DOM2 importNode()
		if (svgdoc.adoptNode) {
			svgcontent = svgdoc.adoptNode(newDoc.documentElement);
		}
		else {
			svgcontent = svgdoc.importNode(newDoc.documentElement, true);
		}
		
		svgroot.appendChild(svgcontent);
		var content = $(svgcontent);
		
		canvas.current_drawing_ = new svgedit.draw.Drawing(svgcontent, idprefix);
		
		// retrieve or set the nonce
		var nonce = getCurrentDrawing().getNonce();
		if (nonce) {
			call('setnonce', nonce);
		} else {
			call('unsetnonce');
		}
		
		// change image href vals if possible
		content.find('image').each(function() {
			var image = this;
			svgedit.utilities.preventClickDefault(image);
			var val = getHref(this);
			if (val) {
				if (val.indexOf('data:') === 0) {
					// Check if an SVG-edit data URI
					var m = val.match(/svgedit_url=(.*?);/);
					if (m) {
						var url = decodeURIComponent(m[1]);
						$(new Image()).load(function () {
							image.setAttributeNS(NS.XLINK, 'xlink:href', url);
						}).attr('src', url);
					}
				}
				// Add to encodableImages if it loads
				canvas.embedImage(val);
			}
		});
	
		// Wrap child SVGs in group elements
		content.find('svg').each(function() {
			// Skip if it's in a <defs>
			if ($(this).closest('defs').length) {return;}
		
			uniquifyElems(this);
		
			// Check if it already has a gsvg group
			var pa = this.parentNode;
			if (pa.childNodes.length === 1 && pa.nodeName === 'g') {
				$(pa).data('gsvg', this);
				pa.id = pa.id || getNextId();
			} else {
				groupSvgElem(this);
			}
		});
		
		// For Firefox: Put all paint elems in defs
		if (svgedit.browser.isGecko()) {
			content.find('linearGradient, radialGradient, pattern').appendTo(svgedit.utilities.findDefs());
		}

		// Set ref element for <use> elements
		
		// TODO: This should also be done if the object is re-added through "redo"
		setUseData(content);
		
		convertGradients(content[0]);
		
		var attrs = {
			id: 'svgcontent',
			overflow: curConfig.show_outside_canvas ? 'visible' : 'hidden'
		};
		
		var percs = false;
		
		// determine proper size
		if (content.attr('viewBox')) {
			var vb = content.attr('viewBox').split(' ');
			attrs.width = vb[2];
			attrs.height = vb[3];
		}
		// handle content that doesn't have a viewBox
		else {
			$.each(['width', 'height'], function(i, dim) {
				// Set to 100 if not given
				var val = content.attr(dim);
				
				if (!val) {val = '100%';}
				
				if (String(val).substr(-1) === '%') {
					// Use user units if percentage given
					percs = true;
				} else {
					attrs[dim] = svgedit.units.convertToNum(dim, val);
				}
			});
		}
		
		// identify layers
		identifyLayers();
		
		// Give ID for any visible layer children missing one
		content.children().find(visElems).each(function() {
			if (!this.id) {this.id = getNextId();}
		});
		
		// Percentage width/height, so let's base it on visible elements
		if (percs) {
			var bb = getStrokedBBox();
			attrs.width = bb.width + bb.x;
			attrs.height = bb.height + bb.y;
		}
		
		// Just in case negative numbers are given or 
		// result from the percs calculation
		if (attrs.width <= 0) {attrs.width = 100;}
		if (attrs.height <= 0) {attrs.height = 100;}
		
		content.attr(attrs);
		this.contentW = attrs.width;
		this.contentH = attrs.height;
		
		batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(svgcontent));
		// update root to the correct size
		var changes = content.attr(['width', 'height']);
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(svgroot, changes));
		
		// reset zoom
		current_zoom = 1;
		
		// reset transform lists
		svgedit.transformlist.resetListMap();
		clearSelection();
		svgedit.path.clearData();
		svgroot.appendChild(selectorManager.selectorParentGroup);
		
		addCommandToHistory(batchCmd);
		call('changed', [svgcontent]);
	} catch(e) {
		console.log(e);
		return false;
	}

	return true;
};

// Function: importSvgString
// This function imports the input SVG XML as a <symbol> in the <defs>, then adds a
// <use> to the current layer.
//
// Parameters:
// xmlString - The SVG as XML text.
//
// Returns:
// This function returns null if the import was unsuccessful, or the element otherwise.
// TODO: 
// * properly handle if namespace is introduced by imported content (must add to svgcontent
// and update all prefixes in the imported node)
// * properly handle recalculating dimensions, recalculateDimensions() doesn't handle
// arbitrary transform lists, but makes some assumptions about how the transform list 
// was obtained
// * import should happen in top-left of current zoomed viewport	
this.importSvgString = function(xmlString) {
	var j, ts;
	try {
		// Get unique ID
		var uid = svgedit.utilities.encode64(xmlString.length + xmlString).substr(0,32);
		
		var useExisting = false;

		// Look for symbol and make sure symbol exists in image
		if (import_ids[uid]) {
			if ( $(import_ids[uid].symbol).parents('#svgroot').length ) {
				useExisting = true;
			}
		}
		
		var batchCmd = new svgedit.history.BatchCommand('Import Image');
		var symbol;
		if (useExisting) {
			symbol = import_ids[uid].symbol;
			ts = import_ids[uid].xform;
		} else {
			// convert string into XML document
			var newDoc = svgedit.utilities.text2xml(xmlString);
	
			this.prepareSvg(newDoc);
	
			// import new svg document into our document
			var svg;
			// If DOM3 adoptNode() available, use it. Otherwise fall back to DOM2 importNode()
			if (svgdoc.adoptNode) {
				svg = svgdoc.adoptNode(newDoc.documentElement);
			} else {
				svg = svgdoc.importNode(newDoc.documentElement, true);
			}
			
			uniquifyElems(svg);
			
			var innerw = svgedit.units.convertToNum('width', svg.getAttribute('width')),
				innerh = svgedit.units.convertToNum('height', svg.getAttribute('height')),
				innervb = svg.getAttribute('viewBox'),
				// if no explicit viewbox, create one out of the width and height
				vb = innervb ? innervb.split(' ') : [0, 0, innerw, innerh];
			for (j = 0; j < 4; ++j) {
				vb[j] = +(vb[j]);
			}
	
			// TODO: properly handle preserveAspectRatio
			var canvasw = +svgcontent.getAttribute('width'),
				canvash = +svgcontent.getAttribute('height');
			// imported content should be 1/3 of the canvas on its largest dimension
			
			if (innerh > innerw) {
				ts = 'scale(' + (canvash/3)/vb[3] + ')';
			} else {
				ts = 'scale(' + (canvash/3)/vb[2] + ')';
			}
			
			// Hack to make recalculateDimensions understand how to scale
			ts = 'translate(0) ' + ts + ' translate(0)';
			
			symbol = svgdoc.createElementNS(NS.SVG, 'symbol');
			var defs = svgedit.utilities.findDefs();
			
			if (svgedit.browser.isGecko()) {
				// Move all gradients into root for Firefox, workaround for this bug:
				// https://bugzilla.mozilla.org/show_bug.cgi?id=353575
				// TODO: Make this properly undo-able.
				$(svg).find('linearGradient, radialGradient, pattern').appendTo(defs);
			}
	
			while (svg.firstChild) {
				var first = svg.firstChild;
				symbol.appendChild(first);
			}
			var attrs = svg.attributes;
			var i;
			for (i = 0; i < attrs.length; i++) {
				var attr = attrs[i];
				symbol.setAttribute(attr.nodeName, attr.value);
			}
			symbol.id = getNextId();
			
			// Store data
			import_ids[uid] = {
				symbol: symbol,
				xform: ts
			};
			
			svgedit.utilities.findDefs().appendChild(symbol);
			batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(symbol));
		}
		
		var use_el = svgdoc.createElementNS(NS.SVG, 'use');
		use_el.id = getNextId();
		setHref(use_el, '#' + symbol.id);
		
		(current_group || getCurrentDrawing().getCurrentLayer()).appendChild(use_el);
		batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(use_el));
		clearSelection();
		
		use_el.setAttribute('transform', ts);
		svgedit.recalculate.recalculateDimensions(use_el);
		$(use_el).data('symbol', symbol).data('ref', symbol);
		addToSelection([use_el]);
		
		// TODO: Find way to add this in a recalculateDimensions-parsable way
//				if (vb[0] != 0 || vb[1] != 0)
//					ts = 'translate(' + (-vb[0]) + ',' + (-vb[1]) + ') ' + ts;
		addCommandToHistory(batchCmd);
		call('changed', [svgcontent]);

	} catch(e) {
		console.log(e);
		return null;
	}

	// we want to return the element so we can automatically select it
	return use_el;
};

// TODO(codedread): Move all layer/context functions in draw.js
// Layer API Functions

// Group: Layers

// Function: identifyLayers
// Updates layer system
var identifyLayers = canvas.identifyLayers = function() {
	leaveContext();
	getCurrentDrawing().identifyLayers();
};

// Function: createLayer
// Creates a new top-level layer in the drawing with the given name, sets the current layer 
// to it, and then clears the selection. This function then calls the 'changed' handler.
// This is an undoable action.
//
// Parameters:
// name - The given name
this.createLayer = function(name, hrService) {
	var new_layer = getCurrentDrawing().createLayer(name, historyRecordingService(hrService));
	clearSelection();
	call('changed', [new_layer]);
};

/**
 * Creates a new top-level layer in the drawing with the given name, copies all the current layer's contents
 * to it, and then clears the selection. This function then calls the 'changed' handler.
 * This is an undoable action.
 * @param {string} name - The given name. If the layer name exists, a new name will be generated.
 * @param {svgedit.history.HistoryRecordingService} hrService - History recording service
 */
this.cloneLayer = function(name, hrService) {
	// Clone the current layer and make the cloned layer the new current layer
	var new_layer = getCurrentDrawing().cloneLayer(name, historyRecordingService(hrService));

	clearSelection();
	leaveContext();
	call('changed', [new_layer]);
};

// Function: deleteCurrentLayer
// Deletes the current layer from the drawing and then clears the selection. This function 
// then calls the 'changed' handler. This is an undoable action.
this.deleteCurrentLayer = function() {
	var current_layer = getCurrentDrawing().getCurrentLayer();
	var nextSibling = current_layer.nextSibling;
	var parent = current_layer.parentNode;
	current_layer = getCurrentDrawing().deleteCurrentLayer();
	if (current_layer) {
		var batchCmd = new svgedit.history.BatchCommand('Delete Layer');
		// store in our Undo History
		batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(current_layer, nextSibling, parent));
		addCommandToHistory(batchCmd);
		clearSelection();
		call('changed', [parent]);
		return true;
	}
	return false;
};

// Function: setCurrentLayer
// Sets the current layer. If the name is not a valid layer name, then this function returns
// false. Otherwise it returns true. This is not an undo-able action.
//
// Parameters:
// name - the name of the layer you want to switch to.
//
// Returns:
// true if the current layer was switched, otherwise false
this.setCurrentLayer = function(name) {
	var result = getCurrentDrawing().setCurrentLayer(svgedit.utilities.toXml(name));
	if (result) {
		clearSelection();
	}
	return result;
};

// Function: renameCurrentLayer
// Renames the current layer. If the layer name is not valid (i.e. unique), then this function 
// does nothing and returns false, otherwise it returns true. This is an undo-able action.
// 
// Parameters:
// newname - the new name you want to give the current layer. This name must be unique 
// among all layer names.
//
// Returns:
// true if the rename succeeded, false otherwise.
this.renameCurrentLayer = function(newname) {
	var drawing = getCurrentDrawing();
	var layer = drawing.getCurrentLayer();
	if (layer) {
		var result = drawing.setCurrentLayerName(newname, historyRecordingService());
		if (result) {
			call('changed', [layer]);
			return true;
		}
	}
	return false;
};

// Function: setCurrentLayerPosition
// Changes the position of the current layer to the new value. If the new index is not valid, 
// this function does nothing and returns false, otherwise it returns true. This is an
// undo-able action.
//
// Parameters:
// newpos - The zero-based index of the new position of the layer. This should be between
// 0 and (number of layers - 1)
// 
// Returns:
// true if the current layer position was changed, false otherwise.
this.setCurrentLayerPosition = function(newpos) {
	var oldpos, drawing = getCurrentDrawing();
	var result = drawing.setCurrentLayerPosition(newpos);
	if (result) {
		addCommandToHistory(new svgedit.history.MoveElementCommand(result.currentGroup, result.oldNextSibling, svgcontent));
		return true;
	}
	return false;
};

// Function: setLayerVisibility
// Sets the visibility of the layer. If the layer name is not valid, this function return 
// false, otherwise it returns true. This is an undo-able action.
//
// Parameters:
// layername - the name of the layer to change the visibility
// bVisible - true/false, whether the layer should be visible
//
// Returns:
// true if the layer's visibility was set, false otherwise
this.setLayerVisibility = function(layername, bVisible) {
	var drawing = getCurrentDrawing();
	var prevVisibility = drawing.getLayerVisibility(layername);
	var layer = drawing.setLayerVisibility(layername, bVisible);
	if (layer) {
		var oldDisplay = prevVisibility ? 'inline' : 'none';
		addCommandToHistory(new svgedit.history.ChangeElementCommand(layer, {'display':oldDisplay}, 'Layer Visibility'));
	} else {
		return false;
	}
	
	if (layer == drawing.getCurrentLayer()) {
		clearSelection();
		pathActions.clear();
	}
//		call('changed', [selected]);	
	return true;
};

// Function: moveSelectedToLayer
// Moves the selected elements to layername. If the name is not a valid layer name, then false 
// is returned. Otherwise it returns true. This is an undo-able action.
//
// Parameters:
// layername - the name of the layer you want to which you want to move the selected elements
//
// Returns:
// true if the selected elements were moved to the layer, false otherwise.
this.moveSelectedToLayer = function(layername) {
	// find the layer
	var i;
	var drawing = getCurrentDrawing();
	var layer = drawing.getLayerByName(layername);
	if (!layer) {return false;}
	
	var batchCmd = new svgedit.history.BatchCommand('Move Elements to Layer');
	
	// loop for each selected element and move it
	var selElems = selectedElements;
	i = selElems.length;
	while (i--) {
		var elem = selElems[i];
		if (!elem) {continue;}
		var oldNextSibling = elem.nextSibling;
		// TODO: this is pretty brittle!
		var oldLayer = elem.parentNode;
		layer.appendChild(elem);
		batchCmd.addSubCommand(new svgedit.history.MoveElementCommand(elem, oldNextSibling, oldLayer));
	}
	
	addCommandToHistory(batchCmd);
	
	return true;
};


this.mergeLayer = function(hrService) {
	getCurrentDrawing().mergeLayer(historyRecordingService(hrService));
	clearSelection();
	leaveContext();
	call('changed', [svgcontent]);
};

this.mergeAllLayers = function(hrService) {
	getCurrentDrawing().mergeAllLayers(historyRecordingService(hrService));
	clearSelection();
	leaveContext();
	call('changed', [svgcontent]);
};

// Function: leaveContext
// Return from a group context to the regular kind, make any previously
// disabled elements enabled again
var leaveContext = this.leaveContext = function() {
	var i, len = disabled_elems.length;
	if (len) {
		for (i = 0; i < len; i++) {
			var elem = disabled_elems[i];
			var orig = elData(elem, 'orig_opac');
			if (orig !== 1) {
				elem.setAttribute('opacity', orig);
			} else {
				elem.removeAttribute('opacity');
			}
			elem.setAttribute('style', 'pointer-events: inherit');
		}
		disabled_elems = [];
		clearSelection(true);
		call('contextset', null);
	}
	current_group = null;
};

// Function: setContext
// Set the current context (for in-group editing)
var setContext = this.setContext = function(elem) {
	leaveContext();
	if (typeof elem === 'string') {
		elem = svgedit.utilities.getElem(elem);
	}

	// Edit inside this group
	current_group = elem;
	
	// Disable other elements
	$(elem).parentsUntil('#svgcontent').andSelf().siblings().each(function() {
		var opac = this.getAttribute('opacity') || 1;
		// Store the original's opacity
		elData(this, 'orig_opac', opac);
		this.setAttribute('opacity', opac * 0.33);
		this.setAttribute('style', 'pointer-events: none');
		disabled_elems.push(this);
	});

	clearSelection();
	call('contextset', current_group);
};

// Group: Document functions

// Function: clear
// Clears the current document. This is not an undoable action.
this.clear = function() {
	pathActions.clear();

	clearSelection();

	// clear the svgcontent node
	canvas.clearSvgContentElement();

	// create new document
	canvas.current_drawing_ = new svgedit.draw.Drawing(svgcontent);

	// create empty first layer
	canvas.createLayer('Layer 1');
	
	// clear the undo stack
	canvas.undoMgr.resetUndoStack();

	// reset the selector manager
	selectorManager.initGroup();

	// reset the rubber band box
	rubberBox = selectorManager.getRubberBandBox();

	call('cleared');
};

// Function: linkControlPoints
// Alias function
this.linkControlPoints = pathActions.linkControlPoints;

// Function: getContentElem
// Returns the content DOM element
this.getContentElem = function() { return svgcontent; };

// Function: getRootElem
// Returns the root DOM element
this.getRootElem = function() { return svgroot; };

// Function: getSelectedElems
// Returns the array with selected DOM elements
this.getSelectedElems = function() { return selectedElements; };

// Function: getResolution
// Returns the current dimensions and zoom level in an object
var getResolution = this.getResolution = function() {
//		var vb = svgcontent.getAttribute('viewBox').split(' ');
//		return {'w':vb[2], 'h':vb[3], 'zoom': current_zoom};
	
	var width = svgcontent.getAttribute('width')/current_zoom;
	var height = svgcontent.getAttribute('height')/current_zoom;
	
	return {
		'w': width,
		'h': height,
		'zoom': current_zoom
	};
};

// Function: getZoom
// Returns the current zoom level
this.getZoom = function(){return current_zoom;};

// Function: getSnapToGrid
// Returns the current snap to grid setting
this.getSnapToGrid = function(){return curConfig.gridSnapping;};


// Function: getVersion
// Returns a string which describes the revision number of SvgCanvas.
this.getVersion = function() {
	return 'svgcanvas.js ($Rev$)';
};

// Function: setUiStrings
// Update interface strings with given values
//
// Parameters:
// strs - Object with strings (see uiStrings for examples)
this.setUiStrings = function(strs) {
	$.extend(uiStrings, strs.notification);
};

// Function: setConfig
// Update configuration options with given values
//
// Parameters:
// opts - Object with options (see curConfig for examples)
this.setConfig = function(opts) {
	$.extend(curConfig, opts);
};

// Function: getTitle
// Returns the current group/SVG's title contents
this.getTitle = function(elem) {
	var i;
	elem = elem || selectedElements[0];
	if (!elem) {return;}
	elem = $(elem).data('gsvg') || $(elem).data('symbol') || elem;
	var childs = elem.childNodes;
	for (i = 0; i < childs.length; i++) {
		if (childs[i].nodeName == 'title') {
			return childs[i].textContent;
		}
	}
	return '';
};

// Function: setGroupTitle
// Sets the group/SVG's title content
// TODO: Combine this with setDocumentTitle
this.setGroupTitle = function(val) {
	var elem = selectedElements[0];
	elem = $(elem).data('gsvg') || elem;
	
	var ts = $(elem).children('title');
	
	var batchCmd = new svgedit.history.BatchCommand('Set Label');
	
	if (!val.length) {
		// Remove title element
		var tsNextSibling = ts.nextSibling;
		batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(ts[0], tsNextSibling, elem));
		ts.remove();
	} else if (ts.length) {
		// Change title contents
		var title = ts[0];
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(title, {'#text': title.textContent}));
		title.textContent = val;
	} else {
		// Add title element
		title = svgdoc.createElementNS(NS.SVG, 'title');
		title.textContent = val;
		$(elem).prepend(title);
		batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(title));
	}

	addCommandToHistory(batchCmd);
};

// Function: getDocumentTitle
// Returns the current document title or an empty string if not found
var getDocumentTitle = this.getDocumentTitle = function() {
	return canvas.getTitle(svgcontent);
};

// Function: setDocumentTitle
// Adds/updates a title element for the document with the given name.
// This is an undoable action
//
// Parameters:
// newtitle - String with the new title
this.setDocumentTitle = function(newtitle) {
	var i;
	var childs = svgcontent.childNodes, doc_title = false, old_title = '';
	
	var batchCmd = new svgedit.history.BatchCommand('Change Image Title');
	
	for (i = 0; i < childs.length; i++) {
		if (childs[i].nodeName == 'title') {
			doc_title = childs[i];
			old_title = doc_title.textContent;
			break;
		}
	}
	if (!doc_title) {
		doc_title = svgdoc.createElementNS(NS.SVG, 'title');
		svgcontent.insertBefore(doc_title, svgcontent.firstChild);
	} 
	
	if (newtitle.length) {
		doc_title.textContent = newtitle;
	} else {
		// No title given, so element is not necessary
		doc_title.parentNode.removeChild(doc_title);
	}
	batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(doc_title, {'#text': old_title}));
	addCommandToHistory(batchCmd);
};

// Function: getEditorNS
// Returns the editor's namespace URL, optionally adds it to root element
//
// Parameters:
// add - Boolean to indicate whether or not to add the namespace value
this.getEditorNS = function(add) {
	if (add) {
		svgcontent.setAttribute('xmlns:se', NS.SE);
	}
	return NS.SE;
};

// Function: setResolution
// Changes the document's dimensions to the given size
//
// Parameters: 
// x - Number with the width of the new dimensions in user units. 
// Can also be the string "fit" to indicate "fit to content"
// y - Number with the height of the new dimensions in user units. 
//
// Returns:
// Boolean to indicate if resolution change was succesful. 
// It will fail on "fit to content" option with no content to fit to.
this.setResolution = function(x, y) {
	var res = getResolution();
	var w = res.w, h = res.h;
	var batchCmd;

	if (x == 'fit') {
		// Get bounding box
		var bbox = getStrokedBBox();
		
		if (bbox) {
			batchCmd = new svgedit.history.BatchCommand('Fit Canvas to Content');
			var visEls = getVisibleElements();
			addToSelection(visEls);
			var dx = [], dy = [];
			$.each(visEls, function(i, item) {
				dx.push(bbox.x*-1);
				dy.push(bbox.y*-1);
			});
			
			var cmd = canvas.moveSelectedElements(dx, dy, true);
			batchCmd.addSubCommand(cmd);
			clearSelection();
			
			x = Math.round(bbox.width);
			y = Math.round(bbox.height);
		} else {
			return false;
		}
	}
	if (x != w || y != h) {
		if (!batchCmd) {
			batchCmd = new svgedit.history.BatchCommand('Change Image Dimensions');
		}

		x = svgedit.units.convertToNum('width', x);
		y = svgedit.units.convertToNum('height', y);
		
		svgcontent.setAttribute('width', x);
		svgcontent.setAttribute('height', y);
		
		this.contentW = x;
		this.contentH = y;
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(svgcontent, {'width':w, 'height':h}));

		svgcontent.setAttribute('viewBox', [0, 0, x/current_zoom, y/current_zoom].join(' '));
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(svgcontent, {'viewBox': ['0 0', w, h].join(' ')}));
	
		addCommandToHistory(batchCmd);
		call('changed', [svgcontent]);
	}
	return true;
};

// Function: getOffset
// Returns an object with x, y values indicating the svgcontent element's
// position in the editor's canvas.
this.getOffset = function() {
	return $(svgcontent).attr(['x', 'y']);
};

// Function: setBBoxZoom
// Sets the zoom level on the canvas-side based on the given value
// 
// Parameters:
// val - Bounding box object to zoom to or string indicating zoom option 
// editor_w - Integer with the editor's workarea box's width
// editor_h - Integer with the editor's workarea box's height
this.setBBoxZoom = function(val, editor_w, editor_h) {
	var spacer = 0.85;
	var bb;
	var calcZoom = function(bb) {
		if (!bb) {return false;}
		var w_zoom = Math.round((editor_w / bb.width)*100 * spacer)/100;
		var h_zoom = Math.round((editor_h / bb.height)*100 * spacer)/100;	
		var zoomlevel = Math.min(w_zoom, h_zoom);
		canvas.setZoom(zoomlevel);
		return {'zoom': zoomlevel, 'bbox': bb};
	};
	
	if (typeof val == 'object') {
		bb = val;
		if (bb.width == 0 || bb.height == 0) {
			var newzoom = bb.zoom ? bb.zoom : current_zoom * bb.factor;
			canvas.setZoom(newzoom);
			return {'zoom': current_zoom, 'bbox': bb};
		}
		return calcZoom(bb);
	}

	switch (val) {
		case 'selection':
			if (!selectedElements[0]) {return;}
			var sel_elems = $.map(selectedElements, function(n){ if (n) {return n;} });
			bb = getStrokedBBox(sel_elems);
			break;
		case 'canvas':
			var res = getResolution();
			spacer = 0.95;
			bb = {width:res.w, height:res.h , x:0, y:0};
			break;
		case 'content':
			bb = getStrokedBBox();
			break;
		case 'layer':
			bb = getStrokedBBox(getVisibleElements(getCurrentDrawing().getCurrentLayer()));
			break;
		default:
			return;
	}
	return calcZoom(bb);
};

// Function: setZoom
// Sets the zoom to the given level
//
// Parameters:
// zoomlevel - Float indicating the zoom level to change to
this.setZoom = function(zoomlevel) {
	var res = getResolution();
	svgcontent.setAttribute('viewBox', '0 0 ' + res.w/zoomlevel + ' ' + res.h/zoomlevel);
	current_zoom = zoomlevel;
	$.each(selectedElements, function(i, elem) {
		if (!elem) {return;}
		selectorManager.requestSelector(elem).resize();
	});
	pathActions.zoomChange();
	runExtensions('zoomChanged', zoomlevel);
};

// Function: getMode
// Returns the current editor mode string
this.getMode = function() {
	return current_mode;
};

// Function: setMode
// Sets the editor's mode to the given string
//
// Parameters:
// name - String with the new mode to change to
this.setMode = function(name) {
	pathActions.clear(true);
	textActions.clear();
	cur_properties = (selectedElements[0] && selectedElements[0].nodeName == 'text') ? cur_text : cur_shape;
	current_mode = name;
};

// Group: Element Styling

// Function: getColor
// Returns the current fill/stroke option
this.getColor = function(type) {
	return cur_properties[type];
};

// Function: setColor
// Change the current stroke/fill color/gradient value
// 
// Parameters:
// type - String indicating fill or stroke
// val - The value to set the stroke attribute to
// preventUndo - Boolean indicating whether or not this should be and undoable option
this.setColor = function(type, val, preventUndo) {
	cur_shape[type] = val;
	cur_properties[type + '_paint'] = {type:'solidColor'};
	var elems = [];
	function addNonG (e) {
		if (e.nodeName != 'g') {
			elems.push(e);
		}
	}
	var i = selectedElements.length;
	while (i--) {
		var elem = selectedElements[i];
		if (elem) {
			if (elem.tagName == 'g') {
				svgedit.utilities.walkTree(elem, addNonG);
			} else {
				if (type == 'fill') {
					if (elem.tagName != 'polyline' && elem.tagName != 'line') {
						elems.push(elem);
					}
				} else {
					elems.push(elem);
				}
			}
		}
	}
	if (elems.length > 0) {
		if (!preventUndo) {
			changeSelectedAttribute(type, val, elems);
			call('changed', elems);
		} else {
			changeSelectedAttributeNoUndo(type, val, elems);
		}
	}
};

// Function: setGradient
// Apply the current gradient to selected element's fill or stroke
//
// Parameters
// type - String indicating "fill" or "stroke" to apply to an element
var setGradient = this.setGradient = function(type) {
	if (!cur_properties[type + '_paint'] || cur_properties[type + '_paint'].type == 'solidColor') {return;}
	var grad = canvas[type + 'Grad'];
	// find out if there is a duplicate gradient already in the defs
	var duplicate_grad = findDuplicateGradient(grad);
	var defs = svgedit.utilities.findDefs();
	// no duplicate found, so import gradient into defs
	if (!duplicate_grad) {
		var orig_grad = grad;
		grad = defs.appendChild( svgdoc.importNode(grad, true) );
		// get next id and set it on the grad
		grad.id = getNextId();
	} else { // use existing gradient
		grad = duplicate_grad;
	}
	canvas.setColor(type, 'url(#' + grad.id + ')');
};

// Function: findDuplicateGradient
// Check if exact gradient already exists
//
// Parameters:
// grad - The gradient DOM element to compare to others
//
// Returns:
// The existing gradient if found, null if not
var findDuplicateGradient = function(grad) {
	var defs = svgedit.utilities.findDefs();
	var existing_grads = $(defs).find('linearGradient, radialGradient');
	var i = existing_grads.length;
	var rad_attrs = ['r', 'cx', 'cy', 'fx', 'fy'];
	while (i--) {
		var og = existing_grads[i];
		if (grad.tagName == 'linearGradient') {
			if (grad.getAttribute('x1') != og.getAttribute('x1') ||
				grad.getAttribute('y1') != og.getAttribute('y1') ||
				grad.getAttribute('x2') != og.getAttribute('x2') ||
				grad.getAttribute('y2') != og.getAttribute('y2')) 
			{
				continue;
			}
		} else {
			var grad_attrs = $(grad).attr(rad_attrs);
			var og_attrs = $(og).attr(rad_attrs);
			
			var diff = false;
			$.each(rad_attrs, function(i, attr) {
				if (grad_attrs[attr] != og_attrs[attr]) {diff = true;}
			});
			
			if (diff) {continue;}
		}
		
		// else could be a duplicate, iterate through stops
		var stops = grad.getElementsByTagNameNS(NS.SVG, 'stop');
		var ostops = og.getElementsByTagNameNS(NS.SVG, 'stop');

		if (stops.length != ostops.length) {
			continue;
		}

		var j = stops.length;
		while (j--) {
			var stop = stops[j];
			var ostop = ostops[j];

			if (stop.getAttribute('offset') != ostop.getAttribute('offset') ||
				stop.getAttribute('stop-opacity') != ostop.getAttribute('stop-opacity') ||
				stop.getAttribute('stop-color') != ostop.getAttribute('stop-color')) 
			{
				break;
			}
		}

		if (j == -1) {
			return og;
		}
	} // for each gradient in defs

	return null;
};

function reorientGrads(elem, m) {
	var i;
	var bb = svgedit.utilities.getBBox(elem);
	for (i = 0; i < 2; i++) {
		var type = i === 0 ? 'fill' : 'stroke';
		var attrVal = elem.getAttribute(type);
		if (attrVal && attrVal.indexOf('url(') === 0) {
			var grad = svgedit.utilities.getRefElem(attrVal);
			if (grad.tagName === 'linearGradient') {
				var x1 = grad.getAttribute('x1') || 0;
				var y1 = grad.getAttribute('y1') || 0;
				var x2 = grad.getAttribute('x2') || 1;
				var y2 = grad.getAttribute('y2') || 0;
				
				// Convert to USOU points
				x1 = (bb.width * x1) + bb.x;
				y1 = (bb.height * y1) + bb.y;
				x2 = (bb.width * x2) + bb.x;
				y2 = (bb.height * y2) + bb.y;
			
				// Transform those points
				var pt1 = svgedit.math.transformPoint(x1, y1, m);
				var pt2 = svgedit.math.transformPoint(x2, y2, m);
				
				// Convert back to BB points
				var g_coords = {};
				
				g_coords.x1 = (pt1.x - bb.x) / bb.width;
				g_coords.y1 = (pt1.y - bb.y) / bb.height;
				g_coords.x2 = (pt2.x - bb.x) / bb.width;
				g_coords.y2 = (pt2.y - bb.y) / bb.height;
		
				var newgrad = grad.cloneNode(true);
				$(newgrad).attr(g_coords);
	
				newgrad.id = getNextId();
				svgedit.utilities.findDefs().appendChild(newgrad);
				elem.setAttribute(type, 'url(#' + newgrad.id + ')');
			}
		}
	}
}

// Function: setPaint
// Set a color/gradient to a fill/stroke
//
// Parameters:
// type - String with "fill" or "stroke"
// paint - The jGraduate paint object to apply
this.setPaint = function(type, paint) {
	// make a copy
	var p = new $.jGraduate.Paint(paint);
	this.setPaintOpacity(type, p.alpha / 100, true);

	// now set the current paint object
	cur_properties[type + '_paint'] = p;
	switch (p.type) {
		case 'solidColor':
			this.setColor(type, p.solidColor != 'none' ? '#' + p.solidColor : 'none');
			break;
		case 'linearGradient':
		case 'radialGradient':
			canvas[type + 'Grad'] = p[p.type];
			setGradient(type);
			break;
	}
};

// alias
this.setStrokePaint = function(paint) {
	this.setPaint('stroke', paint);
};

this.setFillPaint = function(paint) {
	this.setPaint('fill', paint);
};

// Function: getStrokeWidth
// Returns the current stroke-width value
this.getStrokeWidth = function() {
	return cur_properties.stroke_width;
};

// Function: setStrokeWidth
// Sets the stroke width for the current selected elements
// When attempting to set a line's width to 0, this changes it to 1 instead
//
// Parameters:
// val - A Float indicating the new stroke width value
this.setStrokeWidth = function(val) {
	if (val == 0 && ['line', 'path'].indexOf(current_mode) >= 0) {
		canvas.setStrokeWidth(1);
		return;
	}
	cur_properties.stroke_width = val;

	var elems = [];
	function addNonG (e) {
		if (e.nodeName != 'g') {
			elems.push(e);
		}
	}
	var i = selectedElements.length;
	while (i--) {
		var elem = selectedElements[i];
		if (elem) {
			if (elem.tagName == 'g') {
				svgedit.utilities.walkTree(elem, addNonG);
			}
			else {
				elems.push(elem);
			}
		}
	}
	if (elems.length > 0) {
		changeSelectedAttribute('stroke-width', val, elems);
		call('changed', selectedElements);
	}
};

// Function: setStrokeAttr
// Set the given stroke-related attribute the given value for selected elements
//
// Parameters:
// attr - String with the attribute name
// val - String or number with the attribute value
this.setStrokeAttr = function(attr, val) {
	cur_shape[attr.replace('-', '_')] = val;
	var elems = [];
	function addNonG (e) {
		if (e.nodeName != 'g') {
			elems.push(e);
		}
	}
	var i = selectedElements.length;
	while (i--) {
		var elem = selectedElements[i];
		if (elem) {
			if (elem.tagName == 'g') {
				svgedit.utilities.walkTree(elem, function(e){if (e.nodeName!='g') {elems.push(e);}});
			}
			else {
				elems.push(elem);
			}
		}
	}
	if (elems.length > 0) {
		changeSelectedAttribute(attr, val, elems);
		call('changed', selectedElements);
	}
};

// Function: getStyle
// Returns current style options
this.getStyle = function() {
	return cur_shape;
};

// Function: getOpacity
// Returns the current opacity
this.getOpacity = function() {
	return cur_shape.opacity;
};

// Function: setOpacity
// Sets the given opacity to the current selected elements
this.setOpacity = function(val) {
	cur_shape.opacity = val;
	changeSelectedAttribute('opacity', val);
};

// Function: getOpacity
// Returns the current fill opacity
this.getFillOpacity = function() {
	return cur_shape.fill_opacity;
};

// Function: getStrokeOpacity
// Returns the current stroke opacity
this.getStrokeOpacity = function() {
	return cur_shape.stroke_opacity;
};

// Function: setPaintOpacity
// Sets the current fill/stroke opacity
//
// Parameters:
// type - String with "fill" or "stroke"
// val - Float with the new opacity value
// preventUndo - Boolean indicating whether or not this should be an undoable action
this.setPaintOpacity = function(type, val, preventUndo) {
	cur_shape[type + '_opacity'] = val;
	if (!preventUndo) {
		changeSelectedAttribute(type + '-opacity', val);
	}
	else {
		changeSelectedAttributeNoUndo(type + '-opacity', val);
	}
};

// Function: getPaintOpacity
// Gets the current fill/stroke opacity
//
// Parameters:
// type - String with "fill" or "stroke"
this.getPaintOpacity = function(type) {
	return type === 'fill' ? this.getFillOpacity() : this.getStrokeOpacity();
};

// Function: getBlur
// Gets the stdDeviation blur value of the given element
//
// Parameters:
// elem - The element to check the blur value for
this.getBlur = function(elem) {
	var val = 0;
//	var elem = selectedElements[0];

	if (elem) {
		var filter_url = elem.getAttribute('filter');
		if (filter_url) {
			var blur = svgedit.utilities.getElem(elem.id + '_blur');
			if (blur) {
				val = blur.firstChild.getAttribute('stdDeviation');
			}
		}
	}
	return val;
};

(function() {
	var cur_command = null;
	var filter = null;
	var filterHidden = false;
	
	// Function: setBlurNoUndo
	// Sets the stdDeviation blur value on the selected element without being undoable
	//
	// Parameters:
	// val - The new stdDeviation value
	canvas.setBlurNoUndo = function(val) {
		if (!filter) {
			canvas.setBlur(val);
			return;
		}
		if (val === 0) {
			// Don't change the StdDev, as that will hide the element.
			// Instead, just remove the value for "filter"
			changeSelectedAttributeNoUndo('filter', '');
			filterHidden = true;
		} else {
			var elem = selectedElements[0];
			if (filterHidden) {
				changeSelectedAttributeNoUndo('filter', 'url(#' + elem.id + '_blur)');
			}
			if (svgedit.browser.isWebkit()) {
				console.log('e', elem);
				elem.removeAttribute('filter');
				elem.setAttribute('filter', 'url(#' + elem.id + '_blur)');
			}
			changeSelectedAttributeNoUndo('stdDeviation', val, [filter.firstChild]);
			canvas.setBlurOffsets(filter, val);
		}
	};
	
	function finishChange() {
		var bCmd = canvas.undoMgr.finishUndoableChange();
		cur_command.addSubCommand(bCmd);
		addCommandToHistory(cur_command);
		cur_command = null;	
		filter = null;
	}

	// Function: setBlurOffsets
	// Sets the x, y, with, height values of the filter element in order to
	// make the blur not be clipped. Removes them if not neeeded
	//
	// Parameters:
	// filter - The filter DOM element to update
	// stdDev - The standard deviation value on which to base the offset size
	canvas.setBlurOffsets = function(filter, stdDev) {
		if (stdDev > 3) {
			// TODO: Create algorithm here where size is based on expected blur
			svgedit.utilities.assignAttributes(filter, {
				x: '-50%',
				y: '-50%',
				width: '200%',
				height: '200%'
			}, 100);
		} else {
			// Removing these attributes hides text in Chrome (see Issue 579)
			if (!svgedit.browser.isWebkit()) {
				filter.removeAttribute('x');
				filter.removeAttribute('y');
				filter.removeAttribute('width');
				filter.removeAttribute('height');
			}
		}
	};

	// Function: setBlur 
	// Adds/updates the blur filter to the selected element
	//
	// Parameters:
	// val - Float with the new stdDeviation blur value
	// complete - Boolean indicating whether or not the action should be completed (to add to the undo manager)
	canvas.setBlur = function(val, complete) {
		if (cur_command) {
			finishChange();
			return;
		}
	
		// Looks for associated blur, creates one if not found
		var elem = selectedElements[0];
		var elem_id = elem.id;
		filter = svgedit.utilities.getElem(elem_id + '_blur');
		
		val -= 0;
		
		var batchCmd = new svgedit.history.BatchCommand();
		
		// Blur found!
		if (filter) {
			if (val === 0) {
				filter = null;
			}
		} else {
			// Not found, so create
			var newblur = addSvgElementFromJson({ 'element': 'feGaussianBlur',
				'attr': {
					'in': 'SourceGraphic',
					'stdDeviation': val
				}
			});
			
			filter = addSvgElementFromJson({ 'element': 'filter',
				'attr': {
					'id': elem_id + '_blur'
				}
			});
			
			filter.appendChild(newblur);
			svgedit.utilities.findDefs().appendChild(filter);
			
			batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(filter));
		}

		var changes = {filter: elem.getAttribute('filter')};
		
		if (val === 0) {
			elem.removeAttribute('filter');
			batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, changes));
			return;
		}

		changeSelectedAttribute('filter', 'url(#' + elem_id + '_blur)');
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, changes));
		canvas.setBlurOffsets(filter, val);
		
		cur_command = batchCmd;
		canvas.undoMgr.beginUndoableChange('stdDeviation', [filter?filter.firstChild:null]);
		if (complete) {
			canvas.setBlurNoUndo(val);
			finishChange();
		}
	};
}());

// Function: getBold
// Check whether selected element is bold or not
//
// Returns:
// Boolean indicating whether or not element is bold
this.getBold = function() {
	// should only have one element selected
	var selected = selectedElements[0];
	if (selected != null && selected.tagName == 'text' &&
		selectedElements[1] == null) 
	{
		return (selected.getAttribute('font-weight') == 'bold');
	}
	return false;
};

// Function: setBold
// Make the selected element bold or normal
//
// Parameters:
// b - Boolean indicating bold (true) or normal (false)
this.setBold = function(b) {
	var selected = selectedElements[0];
	if (selected != null && selected.tagName == 'text' &&
		selectedElements[1] == null) 
	{
		changeSelectedAttribute('font-weight', b ? 'bold' : 'normal');
	}
	if (!selectedElements[0].textContent) {
		textActions.setCursor();
	}
};

// Function: getItalic
// Check whether selected element is italic or not
//
// Returns:
// Boolean indicating whether or not element is italic
this.getItalic = function() {
	var selected = selectedElements[0];
	if (selected != null && selected.tagName == 'text' &&
		selectedElements[1] == null) 
	{
		return (selected.getAttribute('font-style') == 'italic');
	}
	return false;
};

// Function: setItalic
// Make the selected element italic or normal
//
// Parameters:
// b - Boolean indicating italic (true) or normal (false)
this.setItalic = function(i) {
	var selected = selectedElements[0];
	if (selected != null && selected.tagName == 'text' &&
		selectedElements[1] == null) 
	{
		changeSelectedAttribute('font-style', i ? 'italic' : 'normal');
	}
	if (!selectedElements[0].textContent) {
		textActions.setCursor();
	}
};

// Function: getFontFamily
// Returns the current font family
this.getFontFamily = function() {
	return cur_text.font_family;
};

// Function: setFontFamily
// Set the new font family
//
// Parameters:
// val - String with the new font family
this.setFontFamily = function(val) {
	cur_text.font_family = val;
	changeSelectedAttribute('font-family', val);
	if (selectedElements[0] && !selectedElements[0].textContent) {
		textActions.setCursor();
	}
};


// Function: setFontColor
// Set the new font color
//
// Parameters:
// val - String with the new font color
this.setFontColor = function(val) {
	cur_text.fill = val;
	changeSelectedAttribute('fill', val);
};

// Function: getFontColor
// Returns the current font color
this.getFontColor = function() {
	return cur_text.fill;
};

// Function: getFontSize
// Returns the current font size
this.getFontSize = function() {
	return cur_text.font_size;
};

// Function: setFontSize
// Applies the given font size to the selected element
//
// Parameters:
// val - Float with the new font size
this.setFontSize = function(val) {
	cur_text.font_size = val;
	changeSelectedAttribute('font-size', val);
	if (!selectedElements[0].textContent) {
		textActions.setCursor();
	}
};

// Function: getText
// Returns the current text (textContent) of the selected element
this.getText = function() {
	var selected = selectedElements[0];
	if (selected == null) { return ''; }
	return selected.textContent;
};

// Function: setTextContent
// Updates the text element with the given string
//
// Parameters:
// val - String with the new text
this.setTextContent = function(val) {
	changeSelectedAttribute('#text', val);
	textActions.init(val);
	textActions.setCursor();
};

// Function: setImageURL
// Sets the new image URL for the selected image element. Updates its size if
// a new URL is given
// 
// Parameters:
// val - String with the image URL/path
this.setImageURL = function(val) {
	var elem = selectedElements[0];
	if (!elem) {return;}
	
	var attrs = $(elem).attr(['width', 'height']);
	var setsize = (!attrs.width || !attrs.height);

	var cur_href = getHref(elem);
	
	// Do nothing if no URL change or size change
	if (cur_href !== val) {
		setsize = true;
	} else if (!setsize) {return;}

	var batchCmd = new svgedit.history.BatchCommand('Change Image URL');

	setHref(elem, val);
	batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, {
		'#href': cur_href
	}));

	if (setsize) {
		$(new Image()).load(function() {
			var changes = $(elem).attr(['width', 'height']);
		
			$(elem).attr({
				width: this.width,
				height: this.height
			});
			
			selectorManager.requestSelector(elem).resize();
			
			batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, changes));
			addCommandToHistory(batchCmd);
			call('changed', [elem]);
		}).attr('src', val);
	} else {
		addCommandToHistory(batchCmd);
	}
};

// Function: setLinkURL
// Sets the new link URL for the selected anchor element.
// 
// Parameters:
// val - String with the link URL/path
this.setLinkURL = function(val) {
	var elem = selectedElements[0];
	if (!elem) {return;}
	if (elem.tagName !== 'a') {
		// See if parent is an anchor
		var parents_a = $(elem).parents('a');
		if (parents_a.length) {
			elem = parents_a[0];
		} else {
			return;
		}
	}
	
	var cur_href = getHref(elem);
	
	if (cur_href === val) {return;}
	
	var batchCmd = new svgedit.history.BatchCommand('Change Link URL');

	setHref(elem, val);
	batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(elem, {
		'#href': cur_href
	}));

	addCommandToHistory(batchCmd);
};


// Function: setRectRadius
// Sets the rx & ry values to the selected rect element to change its corner radius
// 
// Parameters:
// val - The new radius
this.setRectRadius = function(val) {
	var selected = selectedElements[0];
	if (selected != null && selected.tagName == 'rect') {
		var r = selected.getAttribute('rx');
		if (r != val) {
			selected.setAttribute('rx', val);
			selected.setAttribute('ry', val);
			addCommandToHistory(new svgedit.history.ChangeElementCommand(selected, {'rx':r, 'ry':r}, 'Radius'));
			call('changed', [selected]);
		}
	}
};

// Function: makeHyperlink
// Wraps the selected element(s) in an anchor element or converts group to one
this.makeHyperlink = function(url) {
	canvas.groupSelectedElements('a', url);
	
	// TODO: If element is a single "g", convert to "a"
	//	if (selectedElements.length > 1 && selectedElements[1]) {

};

// Function: removeHyperlink
this.removeHyperlink = function() {
	canvas.ungroupSelectedElement();
};

// Group: Element manipulation

// Function: setSegType
// Sets the new segment type to the selected segment(s). 
//
// Parameters:
// new_type - Integer with the new segment type
// See http://www.w3.org/TR/SVG/paths.html#InterfaceSVGPathSeg for list
this.setSegType = function(new_type) {
	pathActions.setSegType(new_type);
};

// TODO(codedread): Remove the getBBox argument and split this function into two.
// Function: convertToPath
// Convert selected element to a path, or get the BBox of an element-as-path
//
// Parameters: 
// elem - The DOM element to be converted
// getBBox - Boolean on whether or not to only return the path's BBox
//
// Returns:
// If the getBBox flag is true, the resulting path's bounding box object.
// Otherwise the resulting path element is returned.
this.convertToPath = function(elem, getBBox) {
	if (elem == null) {
		var elems = selectedElements;
		$.each(elems, function(i, elem) {
			if (elem) {canvas.convertToPath(elem);}
		});
		return;
	}
	if (getBBox) {
		return svgedit.utilities.getBBoxOfElementAsPath(elem, addSvgElementFromJson, pathActions)
	} else {
		// TODO: Why is this applying attributes from cur_shape, then inside utilities.convertToPath it's pulling addition attributes from elem?
		// TODO: If convertToPath is called with one elem, cur_shape and elem are probably the same; but calling with multiple is a bug or cool feature.
		var attrs = {
			'fill': cur_shape.fill,
			'fill-opacity': cur_shape.fill_opacity,
			'stroke': cur_shape.stroke,
			'stroke-width': cur_shape.stroke_width,
			'stroke-dasharray': cur_shape.stroke_dasharray,
			'stroke-linejoin': cur_shape.stroke_linejoin,
			'stroke-linecap': cur_shape.stroke_linecap,
			'stroke-opacity': cur_shape.stroke_opacity,
			'opacity': cur_shape.opacity,
			'visibility':'hidden'
		};
		return svgedit.utilities.convertToPath(elem, attrs, addSvgElementFromJson, pathActions, clearSelection, addToSelection, svgedit.history, addCommandToHistory);
	}
};


// Function: changeSelectedAttributeNoUndo
// This function makes the changes to the elements. It does not add the change
// to the history stack. 
// 
// Parameters:
// attr - String with the attribute name
// newValue - String or number with the new attribute value
// elems - The DOM elements to apply the change to
var changeSelectedAttributeNoUndo = function(attr, newValue, elems) {
	if (current_mode == 'pathedit') {
		// Editing node
		pathActions.moveNode(attr, newValue);
	}
	elems = elems || selectedElements;
	var i = elems.length;
	var no_xy_elems = ['g', 'polyline', 'path'];
	var good_g_attrs = ['transform', 'opacity', 'filter'];
	
	while (i--) {
		var elem = elems[i];
		if (elem == null) {continue;}
		
		// Set x,y vals on elements that don't have them
		if ((attr === 'x' || attr === 'y') && no_xy_elems.indexOf(elem.tagName) >= 0) {
			var bbox = getStrokedBBox([elem]);
			var diff_x = attr === 'x' ? newValue - bbox.x : 0;
			var diff_y = attr === 'y' ? newValue - bbox.y : 0;
			canvas.moveSelectedElements(diff_x*current_zoom, diff_y*current_zoom, true);
			continue;
		}
		
		// only allow the transform/opacity/filter attribute to change on <g> elements, slightly hacky
		// TODO: FIXME: This doesn't seem right. Where's the body of this if statement?
		if (elem.tagName === 'g' && good_g_attrs.indexOf(attr) >= 0) {}
		var oldval = attr === '#text' ? elem.textContent : elem.getAttribute(attr);
		if (oldval == null) {oldval = '';}
		if (oldval !== String(newValue)) {
			if (attr == '#text') {
				var old_w = svgedit.utilities.getBBox(elem).width;
				elem.textContent = newValue;
				
				// FF bug occurs on on rotated elements
				if (/rotate/.test(elem.getAttribute('transform'))) {
					elem = ffClone(elem);
				}
				
				// Hoped to solve the issue of moving text with text-anchor="start",
				// but this doesn't actually fix it. Hopefully on the right track, though. -Fyrd
				
//					var box=getBBox(elem), left=box.x, top=box.y, width=box.width,
//						height=box.height, dx = width - old_w, dy=0;
//					var angle = svgedit.utilities.getRotationAngle(elem, true);
//					if (angle) {
//						var r = Math.sqrt( dx*dx + dy*dy );
//						var theta = Math.atan2(dy,dx) - angle;
//						dx = r * Math.cos(theta);
//						dy = r * Math.sin(theta);
//						
//						elem.setAttribute('x', elem.getAttribute('x')-dx);
//						elem.setAttribute('y', elem.getAttribute('y')-dy);
//					}
				
			} else if (attr == '#href') {
				setHref(elem, newValue);
			}
			else {elem.setAttribute(attr, newValue);}

			// Go into "select" mode for text changes
			// NOTE: Important that this happens AFTER elem.setAttribute() or else attributes like
			// font-size can get reset to their old value, ultimately by svgEditor.updateContextPanel(),
			// after calling textActions.toSelectMode() below
			if (current_mode === 'textedit' && attr !== '#text' && elem.textContent.length) {
				textActions.toSelectMode(elem);
			}

//			if (i==0)
//				selectedBBoxes[0] = svgedit.utilities.getBBox(elem);
			// Use the Firefox ffClone hack for text elements with gradients or
			// where other text attributes are changed. 
			if (svgedit.browser.isGecko() && elem.nodeName === 'text' && /rotate/.test(elem.getAttribute('transform'))) {
				if (String(newValue).indexOf('url') === 0 || (['font-size', 'font-family', 'x', 'y'].indexOf(attr) >= 0 && elem.textContent)) {
					elem = ffClone(elem);
				}
			}
			// Timeout needed for Opera & Firefox
			// codedread: it is now possible for this function to be called with elements
			// that are not in the selectedElements array, we need to only request a
			// selector if the element is in that array
			if (selectedElements.indexOf(elem) >= 0) {
				setTimeout(function() {
					// Due to element replacement, this element may no longer
					// be part of the DOM
					if (!elem.parentNode) {return;}
					selectorManager.requestSelector(elem).resize();
				}, 0);
			}
			// if this element was rotated, and we changed the position of this element
			// we need to update the rotational transform attribute 
			var angle = svgedit.utilities.getRotationAngle(elem);
			if (angle != 0 && attr != 'transform') {
				var tlist = svgedit.transformlist.getTransformList(elem);
				var n = tlist.numberOfItems;
				while (n--) {
					var xform = tlist.getItem(n);
					if (xform.type == 4) {
						// remove old rotate
						tlist.removeItem(n);
						
						var box = svgedit.utilities.getBBox(elem);
						var center = svgedit.math.transformPoint(box.x+box.width/2, box.y+box.height/2, svgedit.math.transformListToTransform(tlist).matrix);
						var cx = center.x,
							cy = center.y;
						var newrot = svgroot.createSVGTransform();
						newrot.setRotate(angle, cx, cy);
						tlist.insertItemBefore(newrot, n);
						break;
					}
				}
			}
		} // if oldValue != newValue
	} // for each elem
};

// Function: changeSelectedAttribute
// Change the given/selected element and add the original value to the history stack
// If you want to change all selectedElements, ignore the elems argument.
// If you want to change only a subset of selectedElements, then send the
// subset to this function in the elems argument.
// 
// Parameters:
// attr - String with the attribute name
// newValue - String or number with the new attribute value
// elems - The DOM elements to apply the change to
var changeSelectedAttribute = this.changeSelectedAttribute = function(attr, val, elems) {
	elems = elems || selectedElements;
	canvas.undoMgr.beginUndoableChange(attr, elems);
	var i = elems.length;

	changeSelectedAttributeNoUndo(attr, val, elems);

	var batchCmd = canvas.undoMgr.finishUndoableChange();
	if (!batchCmd.isEmpty()) { 
		addCommandToHistory(batchCmd);
	}
};

// Function: deleteSelectedElements
// Removes all selected elements from the DOM and adds the change to the 
// history stack
this.deleteSelectedElements = function() {
	var i;
	var batchCmd = new svgedit.history.BatchCommand('Delete Elements');
	var len = selectedElements.length;
	var selectedCopy = []; //selectedElements is being deleted

	for (i = 0; i < len; ++i) {
		var selected = selectedElements[i];
		if (selected == null) {break;}

		var parent = selected.parentNode;
		var t = selected;
		
		// this will unselect the element and remove the selectedOutline
		selectorManager.releaseSelector(t);
		
		// Remove the path if present.
		svgedit.path.removePath_(t.id);
		
		// Get the parent if it's a single-child anchor
		if (parent.tagName === 'a' && parent.childNodes.length === 1) {
			t = parent;
			parent = parent.parentNode;
		}
		
		var nextSibling = t.nextSibling;
		var elem = parent.removeChild(t);
		selectedCopy.push(selected); //for the copy
		batchCmd.addSubCommand(new RemoveElementCommand(elem, nextSibling, parent));
	}
	selectedElements = [];

	if (!batchCmd.isEmpty()) {addCommandToHistory(batchCmd);}
	call('changed', selectedCopy);
	clearSelection();
};

// Function: cutSelectedElements
// Removes all selected elements from the DOM and adds the change to the 
// history stack. Remembers removed elements on the clipboard
this.cutSelectedElements = function() {
	svgCanvas.copySelectedElements();
	svgCanvas.deleteSelectedElements();
};

// Function: copySelectedElements
// Remembers the current selected elements on the clipboard
this.copySelectedElements = function() {
	localStorage.setItem('svgedit_clipboard', JSON.stringify(
		selectedElements.map(function(x){ return getJsonFromSvgElement(x) })
	));

	$('#cmenu_canvas').enableContextMenuItems('#paste,#paste_in_place');
};

this.pasteElements = function(type, x, y) {
	var cb = JSON.parse(localStorage.getItem('svgedit_clipboard'));
	var len = cb.length;
	if (!len) {return;}
	
	var pasted = [];
	var batchCmd = new svgedit.history.BatchCommand('Paste elements');
	var drawing = getCurrentDrawing();
	var changedIDs = {};

	// Recursively replace IDs and record the changes
	function checkIDs(elem) {
		if(elem.attr && elem.attr.id) {
			changedIDs[elem.attr.id] = getNextId();
			elem.attr.id = changedIDs[elem.attr.id];
		}
		if(elem.children) elem.children.forEach(checkIDs);
	}
	cb.forEach(checkIDs);

	// Give extensions like the connector extension a chance to reflect new IDs and remove invalid elements
	runExtensions('IDsUpdated', {elems: cb, changes: changedIDs}, true).forEach(function(extChanges){
		if(!extChanges || !('remove' in extChanges)) return;

		extChanges.remove.forEach(function(removeID){
			cb = cb.filter(function(cbItem){
				return cbItem.attr.id != removeID;

			});
		});
	});

	// Move elements to lastClickPoint
	while (len--) {
		var elem = cb[len];
		if (!elem) {continue;}

		var copy = addSvgElementFromJson(elem);
		pasted.push(copy);
		batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(copy));

		restoreRefElems(copy);
	}
	
	selectOnly(pasted);
	
	if (type !== 'in_place') {
		
		var ctr_x, ctr_y;
		
		if (!type) {
			ctr_x = lastClickPoint.x;
			ctr_y = lastClickPoint.y;
		} else if (type === 'point') {
			ctr_x = x;
			ctr_y = y;
		} 
		
		var bbox = getStrokedBBox(pasted);
		var cx = ctr_x - (bbox.x + bbox.width/2),
			cy = ctr_y - (bbox.y + bbox.height/2),
			dx = [],
			dy = [];
	
		$.each(pasted, function(i, item) {
			dx.push(cx);
			dy.push(cy);
		});
		
		var cmd = canvas.moveSelectedElements(dx, dy, false);
		if(cmd) batchCmd.addSubCommand(cmd);
	}

	addCommandToHistory(batchCmd);
	call('changed', pasted);
};

// Function: groupSelectedElements
// Wraps all the selected elements in a group (g) element

// Parameters: 
// type - type of element to group into, defaults to <g>
this.groupSelectedElements = function(type, urlArg) {
	if (!type) {type = 'g';}
	var cmd_str = '';
	
	switch (type) {
		case 'a':
			cmd_str = 'Make hyperlink';
			var url = '';
			if (arguments.length > 1) {
				url = urlArg;
			}
			break;
		default:
			type = 'g';
			cmd_str = 'Group Elements';
			break;
	}
	
	var batchCmd = new svgedit.history.BatchCommand(cmd_str);
	
	// create and insert the group element
	var g = addSvgElementFromJson({
							'element': type,
							'attr': {
								'id': getNextId()
							}
						});
	if (type === 'a') {
		setHref(g, url);
	}
	batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(g));
	
	// now move all children into the group
	var i = selectedElements.length;
	while (i--) {
		var elem = selectedElements[i];
		if (elem == null) {continue;}
		
		if (elem.parentNode.tagName === 'a' && elem.parentNode.childNodes.length === 1) {
			elem = elem.parentNode;
		}
		
		var oldNextSibling = elem.nextSibling;
		var oldParent = elem.parentNode;
		g.appendChild(elem);
		batchCmd.addSubCommand(new svgedit.history.MoveElementCommand(elem, oldNextSibling, oldParent));			
	}
	if (!batchCmd.isEmpty()) {addCommandToHistory(batchCmd);}
	
	// update selection
	selectOnly([g], true);
};


// Function: pushGroupProperties
// Pushes all appropriate parent group properties down to its children, then
// removes them from the group
var pushGroupProperties = this.pushGroupProperties = function(g, undoable) {

	var children = g.childNodes;
	var len = children.length;
	var xform = g.getAttribute('transform');

	var glist = svgedit.transformlist.getTransformList(g);
	var m = svgedit.math.transformListToTransform(glist).matrix;
	
	var batchCmd = new svgedit.history.BatchCommand('Push group properties');

	// TODO: get all fill/stroke properties from the group that we are about to destroy
	// "fill", "fill-opacity", "fill-rule", "stroke", "stroke-dasharray", "stroke-dashoffset", 
	// "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", 
	// "stroke-width"
	// and then for each child, if they do not have the attribute (or the value is 'inherit')
	// then set the child's attribute
	
	var i = 0;
	var gangle = svgedit.utilities.getRotationAngle(g);
	
	var gattrs = $(g).attr(['filter', 'opacity']);
	var gfilter, gblur, changes;
	var drawing = getCurrentDrawing();
	
	for (i = 0; i < len; i++) {
		var elem = children[i];
		
		if (elem.nodeType !== 1) {continue;}
		
		if (gattrs.opacity !== null && gattrs.opacity !== 1) {
			var c_opac = elem.getAttribute('opacity') || 1;
			var new_opac = Math.round((elem.getAttribute('opacity') || 1) * gattrs.opacity * 100)/100;
			changeSelectedAttribute('opacity', new_opac, [elem]);
		}

		if (gattrs.filter) {
			var cblur = this.getBlur(elem);
			var orig_cblur = cblur;
			if (!gblur) {gblur = this.getBlur(g);}
			if (cblur) {
				// Is this formula correct?
				cblur = Number(gblur) + Number(cblur);
			} else if (cblur === 0) {
				cblur = gblur;
			}
			
			// If child has no current filter, get group's filter or clone it.
			if (!orig_cblur) {
				// Set group's filter to use first child's ID
				if (!gfilter) {
					gfilter = svgedit.utilities.getRefElem(gattrs.filter);
				} else {
					// Clone the group's filter
					gfilter = drawing.copyElem(gfilter);
					svgedit.utilities.findDefs().appendChild(gfilter);
				}
			} else {
				gfilter = svgedit.utilities.getRefElem(elem.getAttribute('filter'));
			}

			// Change this in future for different filters
			var suffix = (gfilter.firstChild.tagName === 'feGaussianBlur')?'blur':'filter'; 
			gfilter.id = elem.id + '_' + suffix;
			changeSelectedAttribute('filter', 'url(#' + gfilter.id + ')', [elem]);
			
			// Update blur value 
			if (cblur) {
				changeSelectedAttribute('stdDeviation', cblur, [gfilter.firstChild]);
				canvas.setBlurOffsets(gfilter, cblur);
			}
		}
		
		var chtlist = svgedit.transformlist.getTransformList(elem);

		// Don't process gradient transforms
		if (~elem.tagName.indexOf('Gradient')) {chtlist = null;}
		
		// Hopefully not a problem to add this. Necessary for elements like <desc/>
		if (!chtlist) {continue;}
		
		// Apparently <defs> can get get a transformlist, but we don't want it to have one!
		if (elem.tagName === 'defs') {continue;}
		
		if (glist.numberOfItems) {
			// TODO: if the group's transform is just a rotate, we can always transfer the
			// rotate() down to the children (collapsing consecutive rotates and factoring
			// out any translates)
			if (gangle && glist.numberOfItems == 1) {
				// [Rg] [Rc] [Mc]
				// we want [Tr] [Rc2] [Mc] where:
				//	- [Rc2] is at the child's current center but has the 
				// sum of the group and child's rotation angles
				//	- [Tr] is the equivalent translation that this child 
				// undergoes if the group wasn't there
				
				// [Tr] = [Rg] [Rc] [Rc2_inv]
				
				// get group's rotation matrix (Rg)
				var rgm = glist.getItem(0).matrix;
				
				// get child's rotation matrix (Rc)
				var rcm = svgroot.createSVGMatrix();
				var cangle = svgedit.utilities.getRotationAngle(elem);
				if (cangle) {
					rcm = chtlist.getItem(0).matrix;
				}
				
				// get child's old center of rotation
				var cbox = svgedit.utilities.getBBox(elem);
				var ceqm = svgedit.math.transformListToTransform(chtlist).matrix;
				var coldc = svgedit.math.transformPoint(cbox.x+cbox.width/2, cbox.y+cbox.height/2, ceqm);
				
				// sum group and child's angles
				var sangle = gangle + cangle;
				
				// get child's rotation at the old center (Rc2_inv)
				var r2 = svgroot.createSVGTransform();
				r2.setRotate(sangle, coldc.x, coldc.y);
				
				// calculate equivalent translate
				var trm = svgedit.math.matrixMultiply(rgm, rcm, r2.matrix.inverse());
				
				// set up tlist
				if (cangle) {
					chtlist.removeItem(0);
				}
				
				if (sangle) {
					if (chtlist.numberOfItems) {
						chtlist.insertItemBefore(r2, 0);
					} else {
						chtlist.appendItem(r2);
					}
				}

				if (trm.e || trm.f) {
					var tr = svgroot.createSVGTransform();
					tr.setTranslate(trm.e, trm.f);
					if (chtlist.numberOfItems) {
						chtlist.insertItemBefore(tr, 0);
					} else {
						chtlist.appendItem(tr);
					}
				}
			} else { // more complicated than just a rotate
			
				// transfer the group's transform down to each child and then
				// call svgedit.recalculate.recalculateDimensions()				
				var oldxform = elem.getAttribute('transform');
				changes = {};
				changes.transform = oldxform || '';

				var newxform = svgroot.createSVGTransform();

				// [ gm ] [ chm ] = [ chm ] [ gm' ]
				// [ gm' ] = [ chm_inv ] [ gm ] [ chm ]
				var chm = svgedit.math.transformListToTransform(chtlist).matrix,
					chm_inv = chm.inverse();
				var gm = svgedit.math.matrixMultiply( chm_inv, m, chm );
				newxform.setMatrix(gm);
				chtlist.appendItem(newxform);
			}
			var cmd = svgedit.recalculate.recalculateDimensions(elem);
			if (cmd) {batchCmd.addSubCommand(cmd);}
		}
	}

	
	// remove transform and make it undo-able
	if (xform) {
		changes = {};
		changes.transform = xform;
		g.setAttribute('transform', '');
		g.removeAttribute('transform');				
		batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(g, changes));
	}
	
	if (undoable && !batchCmd.isEmpty()) {
		return batchCmd;
	}
};


// Function: ungroupSelectedElement
// Unwraps all the elements in a selected group (g) element. This requires
// significant recalculations to apply group's transforms, etc to its children
this.ungroupSelectedElement = function() {
	var g = selectedElements[0];
	if (!g) {
		return;
	}
	if ($(g).data('gsvg') || $(g).data('symbol')) {
		// Is svg, so actually convert to group
		convertToGroup(g);
		return;
	}
	if (g.tagName === 'use') {
		// Somehow doesn't have data set, so retrieve
		var symbol = svgedit.utilities.getElem(getHref(g).substr(1));
		$(g).data('symbol', symbol).data('ref', symbol);
		convertToGroup(g);
		return;
	}
	var parents_a = $(g).parents('a');
	if (parents_a.length) {
		g = parents_a[0];
	}
	
	// Look for parent "a"
	if (g.tagName === 'g' || g.tagName === 'a') {
		
		var batchCmd = new svgedit.history.BatchCommand('Ungroup Elements');
		var cmd = pushGroupProperties(g, true);
		if (cmd) {batchCmd.addSubCommand(cmd);}
		
		var parent = g.parentNode;
		var anchor = g.nextSibling;
		var children = new Array(g.childNodes.length);
		
		var i = 0;
		
		while (g.firstChild) {
			var elem = g.firstChild;
			var oldNextSibling = elem.nextSibling;
			var oldParent = elem.parentNode;
			
			// Remove child title elements
			if (elem.tagName === 'title') {
				var nextSibling = elem.nextSibling;
				batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(elem, nextSibling, oldParent));
				oldParent.removeChild(elem);
				continue;
			}
			
			children[i++] = elem = parent.insertBefore(elem, anchor);
			batchCmd.addSubCommand(new svgedit.history.MoveElementCommand(elem, oldNextSibling, oldParent));
		}

		// remove the group from the selection			
		clearSelection();
		
		// delete the group element (but make undo-able)
		var gNextSibling = g.nextSibling;
		g = parent.removeChild(g);
		batchCmd.addSubCommand(new svgedit.history.RemoveElementCommand(g, gNextSibling, parent));

		if (!batchCmd.isEmpty()) {addCommandToHistory(batchCmd);}
		
		// update selection
		addToSelection(children);
	}
};

// Function: moveToTopSelectedElement
// Repositions the selected element to the bottom in the DOM to appear on top of
// other elements
this.moveToTopSelectedElement = function() {
	var selected = selectedElements[0];
	if (selected != null) {
		var t = selected;
		var oldParent = t.parentNode;
		var oldNextSibling = t.nextSibling;
		t = t.parentNode.appendChild(t);
		// If the element actually moved position, add the command and fire the changed
		// event handler.
		if (oldNextSibling != t.nextSibling) {
			addCommandToHistory(new svgedit.history.MoveElementCommand(t, oldNextSibling, oldParent, 'top'));
			call('changed', [t]);
		}
	}
};

// Function: moveToBottomSelectedElement
// Repositions the selected element to the top in the DOM to appear under 
// other elements
this.moveToBottomSelectedElement = function() {
	var selected = selectedElements[0];
	if (selected != null) {
		var t = selected;
		var oldParent = t.parentNode;
		var oldNextSibling = t.nextSibling;
		var firstChild = t.parentNode.firstChild;
		if (firstChild.tagName == 'title') {
			firstChild = firstChild.nextSibling;
		}
		// This can probably be removed, as the defs should not ever apppear
		// inside a layer group
		if (firstChild.tagName == 'defs') {
			firstChild = firstChild.nextSibling;
		}
		t = t.parentNode.insertBefore(t, firstChild);
		// If the element actually moved position, add the command and fire the changed
		// event handler.
		if (oldNextSibling != t.nextSibling) {
			addCommandToHistory(new svgedit.history.MoveElementCommand(t, oldNextSibling, oldParent, 'bottom'));
			call('changed', [t]);
		}
	}
};

// Function: moveUpDownSelected
// Moves the select element up or down the stack, based on the visibly
// intersecting elements
//
// Parameters: 
// dir - String that's either 'Up' or 'Down'
this.moveUpDownSelected = function(dir) {
	var selected = selectedElements[0];
	if (!selected) {return;}
	
	curBBoxes = [];
	var closest, found_cur;
	// jQuery sorts this list
	var list = $(getIntersectionList(getStrokedBBox([selected]))).toArray();
	if (dir == 'Down') {list.reverse();}

	$.each(list, function() {
		if (!found_cur) {
			if (this == selected) {
				found_cur = true;
			}
			return;
		}
		closest = this;
		return false;
	});
	if (!closest) {return;}
	
	var t = selected;
	var oldParent = t.parentNode;
	var oldNextSibling = t.nextSibling;
	$(closest)[dir == 'Down'?'before':'after'](t);
	// If the element actually moved position, add the command and fire the changed
	// event handler.
	if (oldNextSibling != t.nextSibling) {
		addCommandToHistory(new svgedit.history.MoveElementCommand(t, oldNextSibling, oldParent, 'Move ' + dir));
		call('changed', [t]);
	}
};

// Function: moveSelectedElements
// Moves selected elements on the X/Y axis 
//
// Parameters:
// dx - Float with the distance to move on the x-axis
// dy - Float with the distance to move on the y-axis
// undoable - Boolean indicating whether or not the action should be undoable
//
// Returns:
// Batch command for the move
this.moveSelectedElements = function(dx, dy, undoable) {
	// if undoable is not sent, default to true
	// if single values, scale them to the zoom
	if (dx.constructor != Array) {
		dx /= current_zoom;
		dy /= current_zoom;
	}
	undoable = undoable || true;
	var batchCmd = new svgedit.history.BatchCommand('position');
	var i = selectedElements.length;
	while (i--) {
		var selected = selectedElements[i];
		if (selected != null) {
//			if (i==0)
//				selectedBBoxes[0] = svgedit.utilities.getBBox(selected);
			
//			var b = {};
//			for (var j in selectedBBoxes[i]) b[j] = selectedBBoxes[i][j];
//			selectedBBoxes[i] = b;
			
			var xform = svgroot.createSVGTransform();
			var tlist = svgedit.transformlist.getTransformList(selected);
			
			// dx and dy could be arrays
			if (dx.constructor == Array) {
//				if (i==0) {
//					selectedBBoxes[0].x += dx[0];
//					selectedBBoxes[0].y += dy[0];
//				}
				xform.setTranslate(dx[i], dy[i]);
			} else {
//				if (i==0) {
//					selectedBBoxes[0].x += dx;
//					selectedBBoxes[0].y += dy;
//				}
				xform.setTranslate(dx, dy);
			}

			if (tlist.numberOfItems) {
				tlist.insertItemBefore(xform, 0);
			} else {
				tlist.appendItem(xform);
			}
			
			var cmd = svgedit.recalculate.recalculateDimensions(selected);
			if (cmd) {
				batchCmd.addSubCommand(cmd);
			}
			
			selectorManager.requestSelector(selected).resize();
		}
	}
	if (!batchCmd.isEmpty()) {
		if (undoable) {
			addCommandToHistory(batchCmd);
		}
		call('changed', selectedElements);
		return batchCmd;
	}
};

// Function: cloneSelectedElements
// Create deep DOM copies (clones) of all selected elements and move them slightly 
// from their originals
this.cloneSelectedElements = function(x, y) {
	var i, elem;
	var batchCmd = new svgedit.history.BatchCommand('Clone Elements');
	// find all the elements selected (stop at first null)
	var len = selectedElements.length;
	function sortfunction(a, b){
		return ($(b).index() - $(a).index()); //causes an array to be sorted numerically and ascending
	}
	selectedElements.sort(sortfunction);
	for (i = 0; i < len; ++i) {
		elem = selectedElements[i];
		if (elem == null) {break;}
	}
	// use slice to quickly get the subset of elements we need
	var copiedElements = selectedElements.slice(0, i);
	this.clearSelection(true);
	// note that we loop in the reverse way because of the way elements are added
	// to the selectedElements array (top-first)
	var drawing = getCurrentDrawing();
	i = copiedElements.length;
	while (i--) {
		// clone each element and replace it within copiedElements
		elem = copiedElements[i] = drawing.copyElem(copiedElements[i]);
		(current_group || drawing.getCurrentLayer()).appendChild(elem);
		batchCmd.addSubCommand(new svgedit.history.InsertElementCommand(elem));
	}
	
	if (!batchCmd.isEmpty()) {
		addToSelection(copiedElements.reverse()); // Need to reverse for correct selection-adding
		this.moveSelectedElements(x, y, false);
		addCommandToHistory(batchCmd);
	}
};

// Function: alignSelectedElements
// Aligns selected elements
//
// Parameters:
// type - String with single character indicating the alignment type
// relative_to - String that must be one of the following: 
// "selected", "largest", "smallest", "page"
this.alignSelectedElements = function(type, relative_to) {
	var i, elem;
	var bboxes = [], angles = [];
	var minx = Number.MAX_VALUE, maxx = Number.MIN_VALUE, miny = Number.MAX_VALUE, maxy = Number.MIN_VALUE;
	var curwidth = Number.MIN_VALUE, curheight = Number.MIN_VALUE;
	var len = selectedElements.length;
	if (!len) {return;}
	for (i = 0; i < len; ++i) {
		if (selectedElements[i] == null) {break;}
		elem = selectedElements[i];
		bboxes[i] = getStrokedBBox([elem]);
		
		// now bbox is axis-aligned and handles rotation
		switch (relative_to) {
			case 'smallest':
				if ( (type == 'l' || type == 'c' || type == 'r') && (curwidth == Number.MIN_VALUE || curwidth > bboxes[i].width) ||
					 (type == 't' || type == 'm' || type == 'b') && (curheight == Number.MIN_VALUE || curheight > bboxes[i].height) ) {
					minx = bboxes[i].x;
					miny = bboxes[i].y;
					maxx = bboxes[i].x + bboxes[i].width;
					maxy = bboxes[i].y + bboxes[i].height;
					curwidth = bboxes[i].width;
					curheight = bboxes[i].height;
				}
				break;
			case 'largest':
				if ( (type == 'l' || type == 'c' || type == 'r') && (curwidth == Number.MIN_VALUE || curwidth < bboxes[i].width) ||
					 (type == 't' || type == 'm' || type == 'b') && (curheight == Number.MIN_VALUE || curheight < bboxes[i].height) ) {
					minx = bboxes[i].x;
					miny = bboxes[i].y;
					maxx = bboxes[i].x + bboxes[i].width;
					maxy = bboxes[i].y + bboxes[i].height;
					curwidth = bboxes[i].width;
					curheight = bboxes[i].height;
				}
				break;
			default: // 'selected'
				if (bboxes[i].x < minx) {minx = bboxes[i].x;}
				if (bboxes[i].y < miny) {miny = bboxes[i].y;}
				if (bboxes[i].x + bboxes[i].width > maxx) {maxx = bboxes[i].x + bboxes[i].width;}
				if (bboxes[i].y + bboxes[i].height > maxy) {maxy = bboxes[i].y + bboxes[i].height;}
				break;
		}
	} // loop for each element to find the bbox and adjust min/max

	if (relative_to == 'page') {
		minx = 0;
		miny = 0;
		maxx = canvas.contentW;
		maxy = canvas.contentH;
	}

	var dx = new Array(len);
	var dy = new Array(len);
	for (i = 0; i < len; ++i) {
		if (selectedElements[i] == null) {break;}
		elem = selectedElements[i];
		var bbox = bboxes[i];
		dx[i] = 0;
		dy[i] = 0;
		switch (type) {
			case 'l': // left (horizontal)
				dx[i] = minx - bbox.x;
				break;
			case 'c': // center (horizontal)
				dx[i] = (minx+maxx)/2 - (bbox.x + bbox.width/2);
				break;
			case 'r': // right (horizontal)
				dx[i] = maxx - (bbox.x + bbox.width);
				break;
			case 't': // top (vertical)
				dy[i] = miny - bbox.y;
				break;
			case 'm': // middle (vertical)
				dy[i] = (miny+maxy)/2 - (bbox.y + bbox.height/2);
				break;
			case 'b': // bottom (vertical)
				dy[i] = maxy - (bbox.y + bbox.height);
				break;
		}
	}
	this.moveSelectedElements(dx, dy);
};

// Group: Additional editor tools

this.contentW = getResolution().w;
this.contentH = getResolution().h;

// Function: updateCanvas
// Updates the editor canvas width/height/position after a zoom has occurred 
//
// Parameters:
// w - Float with the new width
// h - Float with the new height
//
// Returns: 
// Object with the following values:
// * x - The canvas' new x coordinate
// * y - The canvas' new y coordinate
// * old_x - The canvas' old x coordinate
// * old_y - The canvas' old y coordinate
// * d_x - The x position difference
// * d_y - The y position difference
this.updateCanvas = function(w, h) {
	svgroot.setAttribute('width', w);
	svgroot.setAttribute('height', h);
	var bg = $('#canvasBackground')[0];
	var old_x = svgcontent.getAttribute('x');
	var old_y = svgcontent.getAttribute('y');
	var x = (w/2 - this.contentW*current_zoom/2);
	var y = (h/2 - this.contentH*current_zoom/2);

	svgedit.utilities.assignAttributes(svgcontent, {
		width: this.contentW*current_zoom,
		height: this.contentH*current_zoom,
		'x': x,
		'y': y,
		'viewBox' : '0 0 ' + this.contentW + ' ' + this.contentH
	});
	
	svgedit.utilities.assignAttributes(bg, {
		width: svgcontent.getAttribute('width'),
		height: svgcontent.getAttribute('height'),
		x: x,
		y: y
	});

	var bg_img = svgedit.utilities.getElem('background_image');
	if (bg_img) {
		svgedit.utilities.assignAttributes(bg_img, {
			'width': '100%',
			'height': '100%'
		});
	}
	
	selectorManager.selectorParentGroup.setAttribute('transform', 'translate(' + x + ',' + y + ')');
	runExtensions('canvasUpdated', {new_x:x, new_y:y, old_x:old_x, old_y:old_y, d_x:x - old_x, d_y:y - old_y});
	return {x:x, y:y, old_x:old_x, old_y:old_y, d_x:x - old_x, d_y:y - old_y};
};

// Function: setBackground
// Set the background of the editor (NOT the actual document)
//
// Parameters:
// color - String with fill color to apply
// url - URL or path to image to use
this.setBackground = function(color, url) {
	var bg = svgedit.utilities.getElem('canvasBackground');
	var border = $(bg).find('rect')[0];
	var bg_img = svgedit.utilities.getElem('background_image');
	border.setAttribute('fill', color);
	if (url) {
		if (!bg_img) {
			bg_img = svgdoc.createElementNS(NS.SVG, 'image');
			svgedit.utilities.assignAttributes(bg_img, {
				'id': 'background_image',
				'width': '100%',
				'height': '100%',
				'preserveAspectRatio': 'xMinYMin',
				'style':'pointer-events:none'
			});
		}
		setHref(bg_img, url);
		bg.appendChild(bg_img);
	} else if (bg_img) {
		bg_img.parentNode.removeChild(bg_img);
	}
};

// Function: cycleElement
// Select the next/previous element within the current layer
//
// Parameters:
// next - Boolean where true = next and false = previous element
this.cycleElement = function(next) {
	var num;
	var cur_elem = selectedElements[0];
	var elem = false;
	var all_elems = getVisibleElements(current_group || getCurrentDrawing().getCurrentLayer());
	if (!all_elems.length) {return;}
	if (cur_elem == null) {
		num = next?all_elems.length-1:0;
		elem = all_elems[num];
	} else {
		var i = all_elems.length;
		while (i--) {
			if (all_elems[i] == cur_elem) {
				num = next ? i - 1 : i + 1;
				if (num >= all_elems.length) {
					num = 0;
				} else if (num < 0) {
					num = all_elems.length-1;
				} 
				elem = all_elems[num];
				break;
			} 
		}
	}		
	selectOnly([elem], true);
	call('selected', selectedElements);
};

this.clear();


// DEPRECATED: getPrivateMethods 
// Since all methods are/should be public somehow, this function should be removed

// Being able to access private methods publicly seems wrong somehow,
// but currently appears to be the best way to allow testing and provide
// access to them to plugins.
this.getPrivateMethods = function() {
	var obj = {
		addCommandToHistory: addCommandToHistory,
		setGradient: setGradient,
		addSvgElementFromJson: addSvgElementFromJson,
		assignAttributes: assignAttributes,
		BatchCommand: BatchCommand,
		call: call,
		ChangeElementCommand: ChangeElementCommand,
		copyElem: function(elem) {return getCurrentDrawing().copyElem(elem)},
		ffClone: ffClone,
		findDefs: findDefs,
		findDuplicateGradient: findDuplicateGradient,
		getElem: getElem,
		getId: getId,
		getIntersectionList: getIntersectionList,
		getMouseTarget: getMouseTarget,
		getNextId: getNextId,
		getPathBBox: getPathBBox,
		getUrlFromAttr: getUrlFromAttr,
		hasMatrixTransform: hasMatrixTransform,
		identifyLayers: identifyLayers,
		InsertElementCommand: InsertElementCommand,
		isIdentity: svgedit.math.isIdentity,
		logMatrix: logMatrix,
		matrixMultiply: matrixMultiply,
		MoveElementCommand: MoveElementCommand,
		preventClickDefault: svgedit.utilities.preventClickDefault,
		recalculateAllSelectedDimensions: recalculateAllSelectedDimensions,
		recalculateDimensions: recalculateDimensions,
		remapElement: remapElement,
		RemoveElementCommand: RemoveElementCommand,
		removeUnusedDefElems: removeUnusedDefElems,
		round: round,
		runExtensions: runExtensions,
		sanitizeSvg: sanitizeSvg,
		SVGEditTransformList: svgedit.transformlist.SVGTransformList,
		toString: toString,
		transformBox: svgedit.math.transformBox,
		transformListToTransform: transformListToTransform,
		transformPoint: transformPoint,
		walkTree: svgedit.utilities.walkTree
	};
	return obj;
};

};