Refactored draw.js to use new Layer class.
Flint O'Brien
parent
ebcf3d9c47
commit
575a056bd9
348
editor/draw.js
348
editor/draw.js
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@ -39,7 +39,7 @@ var randomize_ids = RandomizeModes.LET_DOCUMENT_DECIDE;
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* @param {SVGGElement} elem - The SVG element to update
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*/
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function addLayerClass(elem) {
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var classes = elem.getAttribute('class')
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var classes = elem.getAttribute('class');
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if (classes === null || classes === undefined || classes.length === 0) {
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elem.setAttribute('class', LAYER_CLASS);
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} else if (! LAYER_CLASS_REGEX.test(classes)) {
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@ -47,32 +47,136 @@ function addLayerClass(elem) {
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}
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}
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/**
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* This class encapsulates the concept of a layer in the drawing
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* @param {String} name - Layer name
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* @param {SVGGElement} child - Layer SVG group.
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function createLayer(name, svgElem) {
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if (!svgElem) {
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return undefined;
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}
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var svgdoc = svgElem.ownerDocument;
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var new_layer = svgdoc.createElementNS(NS.SVG, "g");
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var layer_title = svgdoc.createElementNS(NS.SVG, "title");
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layer_title.textContent = name;
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new_layer.appendChild(layer_title);
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svgElem.appendChild(new_layer);
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return new_layer;
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}
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/**
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* This class encapsulates the concept of a layer in the drawing. It can be constructed with
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* an existing group element or, with three parameters, will create a new layer group element.
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* @param {string} name - Layer name
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* @param {SVGGElement} group - SVG group element that constitutes the layer or null if a group should be created and added to the DOM..
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* @param {SVGGElement} svgElem - The SVG DOM element. If defined, use this to add
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* a new layer to the document.
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*/
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svgedit.draw.Layer = function(name, group) {
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var Layer = svgedit.draw.Layer = function(name, group, svgElem) {
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this.name_ = name;
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this.group_ = group;
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this.group_ = group || createLayer(name, svgElem);
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addLayerClass(this.group_);
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svgedit.utilities.walkTree(this.group_, function(e){e.setAttribute("style", "pointer-events:inherit");});
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this.group_.setAttribute("style", svgElem ? "pointer-events:all" : "pointer-events:none");
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};
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/**
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* Get the layer's name.
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* @returns {string} The layer name
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*/
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svgedit.draw.Layer.prototype.getName = function() {
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Layer.prototype.getName = function() {
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return this.name_;
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};
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/**
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* Get the group element for this layer.
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* @returns {SVGGElement} The layer SVG group
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*/
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svgedit.draw.Layer.prototype.getGroup = function() {
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Layer.prototype.getGroup = function() {
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return this.group_;
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};
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/**
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* Active this layer so it takes pointer events.
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*/
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Layer.prototype.activate = function() {
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this.group_.setAttribute("style", "pointer-events:all");
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};
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/**
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* Deactive this layer so it does NOT take pointer events.
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*/
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Layer.prototype.deactivate = function() {
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this.group_.setAttribute("style", "pointer-events:none");
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};
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/**
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* Set this layer visible or hidden based on 'visible' parameter.
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* @param {boolean} visible - If true, make visible; otherwise, hide it.
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*/
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Layer.prototype.setVisible = function( visible) {
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var expected = visible === undefined || visible ? "inline" : "none";
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var oldDisplay = this.group_.getAttribute("display");
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if( oldDisplay !== expected) {
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this.group_.setAttribute("display", expected);
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}
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};
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/**
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* Is this layer visible?
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* @returns {boolean} True if visible.
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*/
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Layer.prototype.isVisible = function() {
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return this.group_.getAttribute('display') !== 'none';
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};
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/**
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* Get layer opacity.
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* @returns {number} Opacity value.
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*/
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Layer.prototype.getOpacity = function() {
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var opacity = this.group_.getAttribute('opacity');
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if( opacity === null || opacity === undefined) {
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return 1;
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}
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return parseFloat(opacity);
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};
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/**
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* Sets the opacity of this layer. If opacity is not a value between 0.0 and 1.0,
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* nothing happens.
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* @param {number} opacity - A float value in the range 0.0-1.0
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*/
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Layer.prototype.setOpacity = function( opacity) {
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if (typeof opacity === 'number' && opacity >= 0.0 && opacity <= 1.0) {
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this.group_.setAttribute('opacity', opacity);
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}
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};
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/**
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* Append children to this layer.
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* @param {SVGGElement} children - The children to append to this layer.
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*/
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Layer.prototype.appendChildren = function( children) {
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for (var i = 0; i < children.length; ++i) {
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this.group_.appendChild(children[i]);
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}
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};
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/**
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* Remove this layer's group from the DOM. No more functions on group can be called after this.
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* @param {SVGGElement} children - The children to append to this layer.
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* @returns {SVGGElement} The layer SVG group that was just removed.
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*/
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Layer.prototype.removeGroup = function() {
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var parent = this.group_.parentNode;
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var group = parent.removeChild(this.group_);
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this.group_ = undefined;
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return group;
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};
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/**
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* Called to ensure that drawings will or will not have randomized ids.
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* The currentDrawing will have its nonce set if it doesn't already.
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* @param {boolean} enableRandomization - flag indicating if documents should have randomized ids
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@ -130,15 +234,19 @@ svgedit.draw.Drawing = function(svgElem, opt_idPrefix) {
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/**
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* The z-ordered array of tuples containing layer names and <g> elements.
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* The first layer is the one at the bottom of the rendering.
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* TODO: Turn this into an Array.<Layer>
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* @type {Array.<Array.<String, SVGGElement>>}
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* @type {Layer[]}
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*/
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this.all_layers = [];
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/**
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* Map of all_layers by name.
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* @type {Object.<string,Layer>}
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*/
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this.layer_map = {};
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/**
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* The current layer being used.
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* TODO: Make this a {Layer}.
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* @type {SVGGElement}
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* @type {Layer}
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*/
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this.current_layer = null;
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@ -289,11 +397,7 @@ svgedit.draw.Drawing.prototype.getNumLayers = function() {
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* @param {string} name - The layer name to check
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*/
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svgedit.draw.Drawing.prototype.hasLayer = function (name) {
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var i;
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for (i = 0; i < this.getNumLayers(); i++) {
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if(this.all_layers[i][0] == name) {return true;}
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}
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return false;
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return this.layer_map[name] !== undefined;
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};
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@ -303,32 +407,23 @@ svgedit.draw.Drawing.prototype.hasLayer = function (name) {
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* @returns {string} The name of the ith layer (or the empty string if none found)
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*/
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svgedit.draw.Drawing.prototype.getLayerName = function (i) {
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if (i >= 0 && i < this.getNumLayers()) {
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return this.all_layers[i][0];
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}
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return '';
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return i >= 0 && i < this.getNumLayers() ? this.all_layers[i].getName() : '';
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};
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/**
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* @returns {SVGGElement} The SVGGElement representing the current layer.
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*/
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svgedit.draw.Drawing.prototype.getCurrentLayer = function() {
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return this.current_layer;
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return this.current_layer.getGroup();
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};
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/**
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* Returns the name of the currently selected layer. If an error occurs, an empty string
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* is returned.
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* @returns The name of the currently active layer (or the empty string if none found).
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* @returns {string} The name of the currently active layer (or the empty string if none found).
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*/
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svgedit.draw.Drawing.prototype.getCurrentLayerName = function () {
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var i;
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for (i = 0; i < this.getNumLayers(); ++i) {
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if (this.all_layers[i][1] == this.current_layer) {
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return this.getLayerName(i);
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}
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}
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return '';
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return this.current_layer ? this.current_layer.getName() : '';
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};
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/**
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@ -339,17 +434,15 @@ svgedit.draw.Drawing.prototype.getCurrentLayerName = function () {
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* @returns {boolean} true if the current layer was switched, otherwise false
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*/
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svgedit.draw.Drawing.prototype.setCurrentLayer = function(name) {
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var i;
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for (i = 0; i < this.getNumLayers(); ++i) {
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if (name == this.getLayerName(i)) {
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if (this.current_layer != this.all_layers[i][1]) {
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this.current_layer.setAttribute("style", "pointer-events:none");
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this.current_layer = this.all_layers[i][1];
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this.current_layer.setAttribute("style", "pointer-events:all");
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var layer = this.layer_map[name];
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if (layer) {
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if (this.current_layer) {
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this.current_layer.deactivate();
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}
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this.current_layer = layer;
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this.current_layer.activate();
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return true;
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}
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}
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return false;
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};
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@ -361,111 +454,107 @@ svgedit.draw.Drawing.prototype.setCurrentLayer = function(name) {
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*/
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svgedit.draw.Drawing.prototype.deleteCurrentLayer = function() {
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if (this.current_layer && this.getNumLayers() > 1) {
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// actually delete from the DOM and return it
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var parent = this.current_layer.parentNode;
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var nextSibling = this.current_layer.nextSibling;
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var oldLayerGroup = parent.removeChild(this.current_layer);
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var oldLayerGroup = this.current_layer.removeGroup();
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this.identifyLayers();
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return oldLayerGroup;
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}
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return null;
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};
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/**
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* Find the layer name in a group element.
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* @param group The group element to search in.
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* @returns {string} The layer name or empty string.
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*/
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function findLayerNameInGroup(group) {
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var name = $("title", group).text();
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// Hack for Opera 10.60
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if(!name && svgedit.browser.isOpera() && group.querySelectorAll) {
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name = $(group.querySelectorAll('title')).text();
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}
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return name;
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}
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/**
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* Given a set of names, return a new unique name.
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* @param {string[]} existingLayerNames - Existing layer names.
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* @returns {string} - The new name.
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*/
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function getNewLayerName( existingLayerNames) {
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var i = 1;
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// TODO(codedread): What about internationalization of "Layer"?
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while (existingLayerNames.indexOf(("Layer " + i)) >= 0) { i++; }
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return "Layer " + i;
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}
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/**
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* Updates layer system and sets the current layer to the
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* top-most layer (last <g> child of this drawing).
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*/
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svgedit.draw.Drawing.prototype.identifyLayers = function() {
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this.all_layers = [];
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this.layer_map = {};
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var numchildren = this.svgElem_.childNodes.length;
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// loop through all children of SVG element
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var orphans = [], layernames = [];
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var a_layer = null;
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var layer = null;
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var childgroups = false;
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var i;
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for (i = 0; i < numchildren; ++i) {
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for (var i = 0; i < numchildren; ++i) {
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var child = this.svgElem_.childNodes.item(i);
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// for each g, find its layer name
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if (child && child.nodeType == 1) {
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if (child.tagName == "g") {
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childgroups = true;
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var name = $("title", child).text();
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// Hack for Opera 10.60
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if(!name && svgedit.browser.isOpera() && child.querySelectorAll) {
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name = $(child.querySelectorAll('title')).text();
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}
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// store layer and name in global variable
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var name = findLayerNameInGroup(child);
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if (name) {
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layernames.push(name);
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this.all_layers.push( [name, child] );
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a_layer = child;
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svgedit.utilities.walkTree(child, function(e){e.setAttribute("style", "pointer-events:inherit");});
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a_layer.setAttribute("style", "pointer-events:none");
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addLayerClass(a_layer)
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}
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layer = new Layer( name, child);
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this.all_layers.push(layer);
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this.layer_map[ name] = layer;
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} else {
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// if group did not have a name, it is an orphan
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else {
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orphans.push(child);
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}
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}
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// if child has is "visible" (i.e. not a <title> or <defs> element), then it is an orphan
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else if(~visElems.indexOf(child.nodeName)) {
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var bb = svgedit.utilities.getBBox(child);
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} else if(~visElems.indexOf(child.nodeName)) {
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// Child is "visible" (i.e. not a <title> or <defs> element), so it is an orphan
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orphans.push(child);
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}
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}
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}
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// create a new layer and add all the orphans to it
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var svgdoc = this.svgElem_.ownerDocument;
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// If orphans or no layers found, create a new layer and add all the orphans to it
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if (orphans.length > 0 || !childgroups) {
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i = 1;
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// TODO(codedread): What about internationalization of "Layer"?
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while (layernames.indexOf(("Layer " + i)) >= 0) { i++; }
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var newname = "Layer " + i;
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a_layer = this._doCreateLayer(newname);
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var j;
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for (j = 0; j < orphans.length; ++j) {
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a_layer.appendChild(orphans[j]);
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layer = new Layer( getNewLayerName(layernames), null, this.svgElem_);
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layer.appendChildren(orphans);
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this.all_layers.push(layer);
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this.layer_map[ name] = layer;
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} else {
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layer.activate();
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}
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this.all_layers.push([newname, a_layer] );
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}
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svgedit.utilities.walkTree(a_layer, function(e){e.setAttribute("style", "pointer-events:inherit");});
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this.current_layer = a_layer;
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this.current_layer.setAttribute("style", "pointer-events:all");
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this.current_layer = layer;
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};
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/**
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* Private function that actually creates a new top-level layer in the drawing
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* with the given name and sets the current layer to it.
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* @param {string} name - The given name
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* @returns {SVGGElement} The SVGGElement of the new layer, which is
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* also the current layer of this drawing.
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*/
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svgedit.draw.Drawing.prototype._doCreateLayer = function(name) {
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var svgdoc = this.svgElem_.ownerDocument;
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var new_layer = svgdoc.createElementNS(NS.SVG, "g");
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addLayerClass(new_layer);
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var layer_title = svgdoc.createElementNS(NS.SVG, "title");
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layer_title.textContent = name;
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new_layer.appendChild(layer_title);
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this.svgElem_.appendChild(new_layer);
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return new_layer;
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};
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/**
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* Creates a new top-level layer in the drawing with the given name and
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* sets the current layer to it.
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* @param {string} name - The given name
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* @param {string} name - The given name. If the layer name exists, a new name will be generated.
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* @returns {SVGGElement} The SVGGElement of the new layer, which is
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* also the current layer of this drawing.
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*/
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svgedit.draw.Drawing.prototype.createLayer = function(name) {
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var new_layer = this._doCreateLayer(name);
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this.identifyLayers();
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return new_layer;
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if( this.current_layer) {
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this.current_layer.deactivate();
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}
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// Check for duplicate name.
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if( name === undefined || name === null || name === '' || this.layer_map[name]) {
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name = getNewLayerName(Object.keys(this.layer_map));
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}
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var layer = new Layer( name, null, this.svgElem_);
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this.all_layers.push(layer);
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this.layer_map[ name] = layer;
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this.current_layer = layer;
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return layer.getGroup();
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};
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/**
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@ -475,17 +564,8 @@ svgedit.draw.Drawing.prototype.createLayer = function(name) {
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* @returns {boolean} The visibility state of the layer, or false if the layer name was invalid.
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*/
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svgedit.draw.Drawing.prototype.getLayerVisibility = function(layername) {
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// find the layer
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var layer = null;
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var i;
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for (i = 0; i < this.getNumLayers(); ++i) {
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if (this.getLayerName(i) == layername) {
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layer = this.all_layers[i][1];
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break;
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}
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}
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if (!layer) {return false;}
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return (layer.getAttribute('display') !== 'none');
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var layer = this.layer_map[layername];
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return layer ? layer.isVisible() : false;
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};
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/**
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@ -501,21 +581,10 @@ svgedit.draw.Drawing.prototype.setLayerVisibility = function(layername, bVisible
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if (typeof bVisible !== 'boolean') {
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return null;
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}
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// find the layer
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var layer = null;
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var i;
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for (i = 0; i < this.getNumLayers(); ++i) {
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if (this.getLayerName(i) == layername) {
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layer = this.all_layers[i][1];
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break;
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}
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}
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var layer = this.layer_map[layername];
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if (!layer) {return null;}
|
||||
|
||||
var oldDisplay = layer.getAttribute("display");
|
||||
if (!oldDisplay) {oldDisplay = "inline";}
|
||||
layer.setAttribute("display", bVisible ? "inline" : "none");
|
||||
return layer;
|
||||
layer.setVisible(bVisible);
|
||||
return layer.getGroup();
|
||||
};
|
||||
|
||||
|
||||
|
|
@ -526,18 +595,9 @@ svgedit.draw.Drawing.prototype.setLayerVisibility = function(layername, bVisible
|
|||
* if layername is not a valid layer
|
||||
*/
|
||||
svgedit.draw.Drawing.prototype.getLayerOpacity = function(layername) {
|
||||
var i;
|
||||
for (i = 0; i < this.getNumLayers(); ++i) {
|
||||
if (this.getLayerName(i) == layername) {
|
||||
var g = this.all_layers[i][1];
|
||||
var opacity = g.getAttribute('opacity');
|
||||
if (!opacity) {
|
||||
opacity = '1.0';
|
||||
}
|
||||
return parseFloat(opacity);
|
||||
}
|
||||
}
|
||||
return null;
|
||||
var layer = this.layer_map[layername];
|
||||
if (!layer) {return null;}
|
||||
return layer.getOpacity();
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
@ -551,13 +611,9 @@ svgedit.draw.Drawing.prototype.setLayerOpacity = function(layername, opacity) {
|
|||
if (typeof opacity !== 'number' || opacity < 0.0 || opacity > 1.0) {
|
||||
return;
|
||||
}
|
||||
var i;
|
||||
for (i = 0; i < this.getNumLayers(); ++i) {
|
||||
if (this.getLayerName(i) == layername) {
|
||||
var g = this.all_layers[i][1];
|
||||
g.setAttribute("opacity", opacity);
|
||||
break;
|
||||
}
|
||||
var layer = this.layer_map[layername];
|
||||
if (layer) {
|
||||
layer.setOpacity(opacity);
|
||||
}
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -258,16 +258,17 @@
|
|||
ok(drawing.getSvgElem().hasChildNodes());
|
||||
equals(drawing.getSvgElem().childNodes.length, 1);
|
||||
|
||||
// Check that all_layers is correctly set up.
|
||||
// Check that all_layers are correctly set up.
|
||||
equals(drawing.getNumLayers(), 1);
|
||||
var empty_layer = drawing.all_layers[0][1];
|
||||
var empty_layer = drawing.all_layers[0];
|
||||
ok(empty_layer);
|
||||
equals(empty_layer, drawing.getSvgElem().firstChild);
|
||||
equals(empty_layer.tagName, 'g');
|
||||
equals(empty_layer.getAttribute('class'), LAYER_CLASS);
|
||||
ok(empty_layer.hasChildNodes());
|
||||
equals(empty_layer.childNodes.length, 1);
|
||||
var firstChild = empty_layer.childNodes.item(0);
|
||||
var layerGroup = empty_layer.getGroup();
|
||||
equals(layerGroup, drawing.getSvgElem().firstChild);
|
||||
equals(layerGroup.tagName, 'g');
|
||||
equals(layerGroup.getAttribute('class'), LAYER_CLASS);
|
||||
ok(layerGroup.hasChildNodes());
|
||||
equals(layerGroup.childNodes.length, 1);
|
||||
var firstChild = layerGroup.childNodes.item(0);
|
||||
equals(firstChild.tagName, 'title');
|
||||
|
||||
cleanupSvg(svg);
|
||||
|
|
@ -284,13 +285,13 @@
|
|||
drawing.identifyLayers();
|
||||
|
||||
equals(drawing.getNumLayers(), 3);
|
||||
equals(drawing.all_layers[0][1], svg.childNodes.item(0));
|
||||
equals(drawing.all_layers[1][1], svg.childNodes.item(1));
|
||||
equals(drawing.all_layers[2][1], svg.childNodes.item(2));
|
||||
equals(drawing.all_layers[0].getGroup(), svg.childNodes.item(0));
|
||||
equals(drawing.all_layers[1].getGroup(), svg.childNodes.item(1));
|
||||
equals(drawing.all_layers[2].getGroup(), svg.childNodes.item(2));
|
||||
|
||||
equals(drawing.all_layers[0][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[1][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[2][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[0].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[1].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[2].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
|
||||
cleanupSvg(svg);
|
||||
});
|
||||
|
|
@ -311,17 +312,17 @@
|
|||
drawing.identifyLayers();
|
||||
|
||||
equals(drawing.getNumLayers(), 4);
|
||||
equals(drawing.all_layers[0][1], svg.childNodes.item(0));
|
||||
equals(drawing.all_layers[1][1], svg.childNodes.item(1));
|
||||
equals(drawing.all_layers[2][1], svg.childNodes.item(2));
|
||||
equals(drawing.all_layers[3][1], svg.childNodes.item(3));
|
||||
equals(drawing.all_layers[0].getGroup(), svg.childNodes.item(0));
|
||||
equals(drawing.all_layers[1].getGroup(), svg.childNodes.item(1));
|
||||
equals(drawing.all_layers[2].getGroup(), svg.childNodes.item(2));
|
||||
equals(drawing.all_layers[3].getGroup(), svg.childNodes.item(3));
|
||||
|
||||
equals(drawing.all_layers[0][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[1][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[2][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[3][1].getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[0].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[1].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[2].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
equals(drawing.all_layers[3].getGroup().getAttribute('class'), LAYER_CLASS);
|
||||
|
||||
var layer4 = drawing.all_layers[3][1];
|
||||
var layer4 = drawing.all_layers[3].getGroup();
|
||||
equals(layer4.tagName, 'g');
|
||||
equals(layer4.childNodes.length, 3);
|
||||
equals(layer4.childNodes.item(1), orphan1);
|
||||
|
|
@ -356,7 +357,9 @@
|
|||
ok(drawing.getCurrentLayer);
|
||||
equals(typeof drawing.getCurrentLayer, typeof function(){});
|
||||
ok(drawing.getCurrentLayer());
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[2][1]);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[2].getGroup());
|
||||
|
||||
cleanupSvg(svg);
|
||||
});
|
||||
|
||||
test('Test setCurrentLayer() and getCurrentLayerName()', function() {
|
||||
|
|
@ -371,11 +374,11 @@
|
|||
|
||||
drawing.setCurrentLayer(LAYER2);
|
||||
equals(drawing.getCurrentLayerName(LAYER2), LAYER2);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[1][1]);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[1].getGroup());
|
||||
|
||||
drawing.setCurrentLayer(LAYER3);
|
||||
equals(drawing.getCurrentLayerName(LAYER3), LAYER3);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[2][1]);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[2].getGroup());
|
||||
|
||||
cleanupSvg(svg);
|
||||
});
|
||||
|
|
@ -392,7 +395,7 @@
|
|||
|
||||
var NEW_LAYER_NAME = 'Layer A';
|
||||
var layer_g = drawing.createLayer(NEW_LAYER_NAME);
|
||||
equals(4, drawing.getNumLayers());
|
||||
equals(drawing.getNumLayers(), 4);
|
||||
equals(layer_g, drawing.getCurrentLayer());
|
||||
equals(layer_g.getAttribute('class'), LAYER_CLASS);
|
||||
equals(NEW_LAYER_NAME, drawing.getCurrentLayerName());
|
||||
|
|
@ -492,14 +495,14 @@
|
|||
drawing.setCurrentLayer(LAYER2);
|
||||
|
||||
var curLayer = drawing.getCurrentLayer();
|
||||
equals(curLayer, drawing.all_layers[1][1]);
|
||||
equals(curLayer, drawing.all_layers[1].getGroup());
|
||||
var deletedLayer = drawing.deleteCurrentLayer();
|
||||
|
||||
equals(curLayer, deletedLayer);
|
||||
equals(2, drawing.getNumLayers());
|
||||
equals(LAYER1, drawing.all_layers[0][0]);
|
||||
equals(LAYER3, drawing.all_layers[1][0]);
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[1][1]);
|
||||
equals(LAYER1, drawing.all_layers[0].getName());
|
||||
equals(LAYER3, drawing.all_layers[1].getName());
|
||||
equals(drawing.getCurrentLayer(), drawing.all_layers[1].getGroup());
|
||||
});
|
||||
|
||||
test('Test svgedit.draw.randomizeIds()', function() {
|
||||
|
|
|
|||
Loading…
Reference in New Issue