318 lines
10 KiB
JavaScript
318 lines
10 KiB
JavaScript
/*globals $, svgroot */
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/*jslint vars: true, eqeq: true, forin: true*/
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/**
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* Coords.
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*
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* Licensed under the MIT License
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*
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*/
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// Dependencies:
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// 1) jquery.js
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// 2) math.js
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// 3) pathseg.js
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// 4) browser.js
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// 5) svgutils.js
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// 6) units.js
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// 7) svgtransformlist.js
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var svgedit = svgedit || {};
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(function() {'use strict';
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if (!svgedit.coords) {
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svgedit.coords = {};
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}
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// this is how we map paths to our preferred relative segment types
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var pathMap = [0, 'z', 'M', 'm', 'L', 'l', 'C', 'c', 'Q', 'q', 'A', 'a',
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'H', 'h', 'V', 'v', 'S', 's', 'T', 't'];
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/**
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* @typedef editorContext
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* @type {?object}
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* @property {function} getGridSnapping
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* @property {function} getDrawing
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*/
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var editorContext_ = null;
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/**
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* @param {editorContext} editorContext
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*/
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svgedit.coords.init = function(editorContext) {
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editorContext_ = editorContext;
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};
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/**
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* Applies coordinate changes to an element based on the given matrix
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* @param {Element} selected - DOM element to be changed
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* @param {object} changes - Object with changes to be remapped
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* @param {SVGMatrix} m - Matrix object to use for remapping coordinates
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*/
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svgedit.coords.remapElement = function(selected, changes, m) {
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var i, type,
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remap = function(x, y) { return svgedit.math.transformPoint(x, y, m); },
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scalew = function(w) { return m.a * w; },
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scaleh = function(h) { return m.d * h; },
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doSnapping = editorContext_.getGridSnapping() && selected.parentNode.parentNode.localName === 'svg',
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finishUp = function() {
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var o;
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if (doSnapping) {
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for (o in changes) {
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changes[o] = svgedit.utilities.snapToGrid(changes[o]);
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}
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}
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svgedit.utilities.assignAttributes(selected, changes, 1000, true);
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},
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box = svgedit.utilities.getBBox(selected);
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for (i = 0; i < 2; i++) {
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type = i === 0 ? 'fill' : 'stroke';
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var attrVal = selected.getAttribute(type);
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if (attrVal && attrVal.indexOf('url(') === 0) {
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if (m.a < 0 || m.d < 0) {
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var grad = svgedit.utilities.getRefElem(attrVal);
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var newgrad = grad.cloneNode(true);
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if (m.a < 0) {
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// flip x
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var x1 = newgrad.getAttribute('x1');
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var x2 = newgrad.getAttribute('x2');
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newgrad.setAttribute('x1', -(x1 - 1));
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newgrad.setAttribute('x2', -(x2 - 1));
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}
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if (m.d < 0) {
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// flip y
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var y1 = newgrad.getAttribute('y1');
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var y2 = newgrad.getAttribute('y2');
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newgrad.setAttribute('y1', -(y1 - 1));
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newgrad.setAttribute('y2', -(y2 - 1));
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}
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newgrad.id = editorContext_.getDrawing().getNextId();
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svgedit.utilities.findDefs().appendChild(newgrad);
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selected.setAttribute(type, 'url(#' + newgrad.id + ')');
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}
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// Not really working :(
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// if (selected.tagName === 'path') {
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// reorientGrads(selected, m);
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// }
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}
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}
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var elName = selected.tagName;
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var chlist, mt;
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if (elName === 'g' || elName === 'text' || elName == 'tspan' || elName === 'use') {
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// if it was a translate, then just update x,y
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if (m.a == 1 && m.b == 0 && m.c == 0 && m.d == 1 && (m.e != 0 || m.f != 0) ) {
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// [T][M] = [M][T']
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// therefore [T'] = [M_inv][T][M]
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var existing = svgedit.math.transformListToTransform(selected).matrix,
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t_new = svgedit.math.matrixMultiply(existing.inverse(), m, existing);
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changes.x = parseFloat(changes.x) + t_new.e;
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changes.y = parseFloat(changes.y) + t_new.f;
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} else {
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// we just absorb all matrices into the element and don't do any remapping
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chlist = svgedit.transformlist.getTransformList(selected);
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mt = svgroot.createSVGTransform();
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mt.setMatrix(svgedit.math.matrixMultiply(svgedit.math.transformListToTransform(chlist).matrix, m));
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chlist.clear();
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chlist.appendItem(mt);
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}
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}
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var c, pt, pt1, pt2, len;
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// now we have a set of changes and an applied reduced transform list
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// we apply the changes directly to the DOM
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switch (elName) {
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case 'foreignObject':
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case 'rect':
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case 'image':
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// Allow images to be inverted (give them matrix when flipped)
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if (elName === 'image' && (m.a < 0 || m.d < 0)) {
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// Convert to matrix
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chlist = svgedit.transformlist.getTransformList(selected);
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mt = svgroot.createSVGTransform();
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mt.setMatrix(svgedit.math.matrixMultiply(svgedit.math.transformListToTransform(chlist).matrix, m));
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chlist.clear();
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chlist.appendItem(mt);
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} else {
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pt1 = remap(changes.x, changes.y);
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changes.width = scalew(changes.width);
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changes.height = scaleh(changes.height);
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changes.x = pt1.x + Math.min(0, changes.width);
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changes.y = pt1.y + Math.min(0, changes.height);
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changes.width = Math.abs(changes.width);
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changes.height = Math.abs(changes.height);
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}
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finishUp();
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break;
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case 'ellipse':
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c = remap(changes.cx, changes.cy);
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changes.cx = c.x;
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changes.cy = c.y;
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changes.rx = scalew(changes.rx);
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changes.ry = scaleh(changes.ry);
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changes.rx = Math.abs(changes.rx);
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changes.ry = Math.abs(changes.ry);
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finishUp();
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break;
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case 'circle':
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c = remap(changes.cx,changes.cy);
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changes.cx = c.x;
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changes.cy = c.y;
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// take the minimum of the new selected box's dimensions for the new circle radius
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var tbox = svgedit.math.transformBox(box.x, box.y, box.width, box.height, m);
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var w = tbox.tr.x - tbox.tl.x, h = tbox.bl.y - tbox.tl.y;
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changes.r = Math.min(w/2, h/2);
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if (changes.r) {changes.r = Math.abs(changes.r);}
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finishUp();
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break;
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case 'line':
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pt1 = remap(changes.x1, changes.y1);
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pt2 = remap(changes.x2, changes.y2);
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changes.x1 = pt1.x;
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changes.y1 = pt1.y;
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changes.x2 = pt2.x;
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changes.y2 = pt2.y;
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// deliberately fall through here
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case 'text':
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case 'tspan':
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case 'use':
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finishUp();
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break;
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case 'g':
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var gsvg = $(selected).data('gsvg');
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if (gsvg) {
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svgedit.utilities.assignAttributes(gsvg, changes, 1000, true);
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}
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break;
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case 'polyline':
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case 'polygon':
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len = changes.points.length;
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for (i = 0; i < len; ++i) {
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pt = changes.points[i];
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pt = remap(pt.x, pt.y);
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changes.points[i].x = pt.x;
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changes.points[i].y = pt.y;
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}
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len = changes.points.length;
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var pstr = '';
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for (i = 0; i < len; ++i) {
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pt = changes.points[i];
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pstr += pt.x + ',' + pt.y + ' ';
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}
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selected.setAttribute('points', pstr);
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break;
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case 'path':
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var seg;
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var segList = selected.pathSegList;
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len = segList.numberOfItems;
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changes.d = [];
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for (i = 0; i < len; ++i) {
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seg = segList.getItem(i);
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changes.d[i] = {
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type: seg.pathSegType,
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x: seg.x,
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y: seg.y,
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x1: seg.x1,
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y1: seg.y1,
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x2: seg.x2,
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y2: seg.y2,
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r1: seg.r1,
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r2: seg.r2,
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angle: seg.angle,
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largeArcFlag: seg.largeArcFlag,
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sweepFlag: seg.sweepFlag
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};
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}
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len = changes.d.length;
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var firstseg = changes.d[0],
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currentpt = remap(firstseg.x, firstseg.y);
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changes.d[0].x = currentpt.x;
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changes.d[0].y = currentpt.y;
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for (i = 1; i < len; ++i) {
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seg = changes.d[i];
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type = seg.type;
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// if absolute or first segment, we want to remap x, y, x1, y1, x2, y2
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// if relative, we want to scalew, scaleh
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if (type % 2 == 0) { // absolute
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var thisx = (seg.x != undefined) ? seg.x : currentpt.x, // for V commands
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thisy = (seg.y != undefined) ? seg.y : currentpt.y; // for H commands
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pt = remap(thisx,thisy);
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pt1 = remap(seg.x1, seg.y1);
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pt2 = remap(seg.x2, seg.y2);
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seg.x = pt.x;
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seg.y = pt.y;
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seg.x1 = pt1.x;
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seg.y1 = pt1.y;
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seg.x2 = pt2.x;
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seg.y2 = pt2.y;
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seg.r1 = scalew(seg.r1);
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seg.r2 = scaleh(seg.r2);
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}
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else { // relative
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seg.x = scalew(seg.x);
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seg.y = scaleh(seg.y);
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seg.x1 = scalew(seg.x1);
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seg.y1 = scaleh(seg.y1);
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seg.x2 = scalew(seg.x2);
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seg.y2 = scaleh(seg.y2);
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seg.r1 = scalew(seg.r1);
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seg.r2 = scaleh(seg.r2);
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}
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} // for each segment
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var dstr = '';
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len = changes.d.length;
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for (i = 0; i < len; ++i) {
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seg = changes.d[i];
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type = seg.type;
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dstr += pathMap[type];
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switch (type) {
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case 13: // relative horizontal line (h)
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case 12: // absolute horizontal line (H)
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dstr += seg.x + ' ';
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break;
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case 15: // relative vertical line (v)
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case 14: // absolute vertical line (V)
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dstr += seg.y + ' ';
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break;
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case 3: // relative move (m)
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case 5: // relative line (l)
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case 19: // relative smooth quad (t)
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case 2: // absolute move (M)
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case 4: // absolute line (L)
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case 18: // absolute smooth quad (T)
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dstr += seg.x + ',' + seg.y + ' ';
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break;
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case 7: // relative cubic (c)
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case 6: // absolute cubic (C)
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dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x2 + ',' + seg.y2 + ' ' +
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seg.x + ',' + seg.y + ' ';
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break;
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case 9: // relative quad (q)
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case 8: // absolute quad (Q)
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dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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case 11: // relative elliptical arc (a)
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case 10: // absolute elliptical arc (A)
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dstr += seg.r1 + ',' + seg.r2 + ' ' + seg.angle + ' ' + (+seg.largeArcFlag) +
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' ' + (+seg.sweepFlag) + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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case 17: // relative smooth cubic (s)
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case 16: // absolute smooth cubic (S)
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dstr += seg.x2 + ',' + seg.y2 + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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}
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}
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selected.setAttribute('d', dstr);
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break;
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}
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};
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}());
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