993 lines
25 KiB
JavaScript
993 lines
25 KiB
JavaScript
/*globals $, svgedit, svgroot*/
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/*jslint vars: true, eqeq: true, continue: true*/
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/**
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* Package: svgedit.path
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*
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* Licensed under the MIT License
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*
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* Copyright(c) 2011 Alexis Deveria
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* Copyright(c) 2011 Jeff Schiller
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*/
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// Dependencies:
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// 1) jQuery
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// 2) browser.js
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// 3) math.js
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// 4) svgutils.js
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(function() {'use strict';
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if (!svgedit.path) {
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svgedit.path = {};
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}
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var NS = svgedit.NS;
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var uiStrings = {
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'pathNodeTooltip': 'Drag node to move it. Double-click node to change segment type',
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'pathCtrlPtTooltip': 'Drag control point to adjust curve properties'
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};
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var segData = {
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2: ['x', 'y'],
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4: ['x', 'y'],
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6: ['x', 'y', 'x1', 'y1', 'x2', 'y2'],
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8: ['x', 'y', 'x1', 'y1'],
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10: ['x', 'y', 'r1', 'r2', 'angle', 'largeArcFlag', 'sweepFlag'],
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12: ['x'],
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14: ['y'],
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16: ['x', 'y', 'x2', 'y2'],
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18: ['x', 'y']
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};
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var pathFuncs = [];
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var link_control_pts = true;
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// Stores references to paths via IDs.
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// TODO: Make this cross-document happy.
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var pathData = {};
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svgedit.path.setLinkControlPoints = function(lcp) {
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link_control_pts = lcp;
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};
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svgedit.path.path = null;
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var editorContext_ = null;
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svgedit.path.init = function(editorContext) {
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editorContext_ = editorContext;
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pathFuncs = [0, 'ClosePath'];
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var pathFuncsStrs = ['Moveto', 'Lineto', 'CurvetoCubic', 'CurvetoQuadratic', 'Arc',
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'LinetoHorizontal', 'LinetoVertical', 'CurvetoCubicSmooth', 'CurvetoQuadraticSmooth'];
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$.each(pathFuncsStrs, function(i, s) {
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pathFuncs.push(s+'Abs');
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pathFuncs.push(s+'Rel');
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});
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};
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svgedit.path.insertItemBefore = function(elem, newseg, index) {
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// Support insertItemBefore on paths for FF2
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var list = elem.pathSegList;
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if (svgedit.browser.supportsPathInsertItemBefore()) {
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list.insertItemBefore(newseg, index);
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return;
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}
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var len = list.numberOfItems;
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var arr = [];
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var i;
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for (i=0; i < len; i++) {
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var cur_seg = list.getItem(i);
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arr.push(cur_seg);
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}
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list.clear();
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for (i=0; i < len; i++) {
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if (i == index) { //index+1
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list.appendItem(newseg);
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}
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list.appendItem(arr[i]);
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}
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};
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// TODO: See if this should just live in replacePathSeg
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svgedit.path.ptObjToArr = function(type, seg_item) {
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var arr = segData[type], len = arr.length;
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var i, out = [];
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for (i = 0; i < len; i++) {
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out[i] = seg_item[arr[i]];
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}
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return out;
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};
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svgedit.path.getGripPt = function(seg, alt_pt) {
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var out = {
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x: alt_pt? alt_pt.x : seg.item.x,
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y: alt_pt? alt_pt.y : seg.item.y
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}, path = seg.path;
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if (path.matrix) {
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var pt = svgedit.math.transformPoint(out.x, out.y, path.matrix);
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out = pt;
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}
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out.x *= editorContext_.getCurrentZoom();
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out.y *= editorContext_.getCurrentZoom();
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return out;
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};
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svgedit.path.getPointFromGrip = function(pt, path) {
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var out = {
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x: pt.x,
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y: pt.y
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};
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if (path.matrix) {
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pt = svgedit.math.transformPoint(out.x, out.y, path.imatrix);
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out.x = pt.x;
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out.y = pt.y;
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}
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out.x /= editorContext_.getCurrentZoom();
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out.y /= editorContext_.getCurrentZoom();
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return out;
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};
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svgedit.path.addPointGrip = function(index, x, y) {
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// create the container of all the point grips
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var pointGripContainer = svgedit.path.getGripContainer();
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var pointGrip = svgedit.utilities.getElem('pathpointgrip_'+index);
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// create it
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if (!pointGrip) {
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pointGrip = document.createElementNS(NS.SVG, 'circle');
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svgedit.utilities.assignAttributes(pointGrip, {
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'id': 'pathpointgrip_' + index,
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'display': 'none',
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'r': 4,
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'fill': '#0FF',
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'stroke': '#00F',
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'stroke-width': 2,
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'cursor': 'move',
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'style': 'pointer-events:all',
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'xlink:title': uiStrings.pathNodeTooltip
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});
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pointGrip = pointGripContainer.appendChild(pointGrip);
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var grip = $('#pathpointgrip_'+index);
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grip.dblclick(function() {
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if (svgedit.path.path) {
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svgedit.path.path.setSegType();
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}
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});
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}
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if (x && y) {
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// set up the point grip element and display it
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svgedit.utilities.assignAttributes(pointGrip, {
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'cx': x,
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'cy': y,
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'display': 'inline'
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});
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}
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return pointGrip;
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};
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svgedit.path.getGripContainer = function() {
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var c = svgedit.utilities.getElem('pathpointgrip_container');
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if (!c) {
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var parent = svgedit.utilities.getElem('selectorParentGroup');
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c = parent.appendChild(document.createElementNS(NS.SVG, 'g'));
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c.id = 'pathpointgrip_container';
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}
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return c;
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};
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svgedit.path.addCtrlGrip = function(id) {
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var pointGrip = svgedit.utilities.getElem('ctrlpointgrip_'+id);
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if (pointGrip) {return pointGrip;}
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pointGrip = document.createElementNS(NS.SVG, 'circle');
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svgedit.utilities.assignAttributes(pointGrip, {
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'id': 'ctrlpointgrip_' + id,
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'display': 'none',
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'r': 4,
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'fill': '#0FF',
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'stroke': '#55F',
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'stroke-width': 1,
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'cursor': 'move',
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'style': 'pointer-events:all',
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'xlink:title': uiStrings.pathCtrlPtTooltip
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});
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svgedit.path.getGripContainer().appendChild(pointGrip);
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return pointGrip;
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};
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svgedit.path.getCtrlLine = function(id) {
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var ctrlLine = svgedit.utilities.getElem('ctrlLine_'+id);
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if (ctrlLine) {return ctrlLine;}
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ctrlLine = document.createElementNS(NS.SVG, 'line');
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svgedit.utilities.assignAttributes(ctrlLine, {
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'id': 'ctrlLine_'+id,
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'stroke': '#555',
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'stroke-width': 1,
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'style': 'pointer-events:none'
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});
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svgedit.path.getGripContainer().appendChild(ctrlLine);
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return ctrlLine;
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};
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svgedit.path.getPointGrip = function(seg, update) {
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var index = seg.index;
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var pointGrip = svgedit.path.addPointGrip(index);
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if (update) {
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var pt = svgedit.path.getGripPt(seg);
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svgedit.utilities.assignAttributes(pointGrip, {
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'cx': pt.x,
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'cy': pt.y,
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'display': 'inline'
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});
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}
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return pointGrip;
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};
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svgedit.path.getControlPoints = function(seg) {
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var item = seg.item;
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var index = seg.index;
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if (!('x1' in item) || !('x2' in item)) {return null;}
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var cpt = {};
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var pointGripContainer = svgedit.path.getGripContainer();
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// Note that this is intentionally not seg.prev.item
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var prev = svgedit.path.path.segs[index-1].item;
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var seg_items = [prev, item];
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var i;
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for (i = 1; i < 3; i++) {
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var id = index + 'c' + i;
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var ctrlLine = cpt['c' + i + '_line'] = svgedit.path.getCtrlLine(id);
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var pt = svgedit.path.getGripPt(seg, {x:item['x' + i], y:item['y' + i]});
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var gpt = svgedit.path.getGripPt(seg, {x:seg_items[i-1].x, y:seg_items[i-1].y});
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svgedit.utilities.assignAttributes(ctrlLine, {
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'x1': pt.x,
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'y1': pt.y,
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'x2': gpt.x,
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'y2': gpt.y,
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'display': 'inline'
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});
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cpt['c' + i + '_line'] = ctrlLine;
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// create it
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var pointGrip = cpt['c' + i] = svgedit.path.addCtrlGrip(id);
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svgedit.utilities.assignAttributes(pointGrip, {
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'cx': pt.x,
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'cy': pt.y,
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'display': 'inline'
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});
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cpt['c' + i] = pointGrip;
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}
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return cpt;
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};
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// This replaces the segment at the given index. Type is given as number.
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svgedit.path.replacePathSeg = function(type, index, pts, elem) {
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var path = elem || svgedit.path.path.elem;
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var func = 'createSVGPathSeg' + pathFuncs[type];
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var seg = path[func].apply(path, pts);
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if (svgedit.browser.supportsPathReplaceItem()) {
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path.pathSegList.replaceItem(seg, index);
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} else {
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var segList = path.pathSegList;
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var len = segList.numberOfItems;
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var arr = [];
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var i;
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for (i = 0; i < len; i++) {
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var cur_seg = segList.getItem(i);
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arr.push(cur_seg);
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}
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segList.clear();
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for (i = 0; i < len; i++) {
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if (i == index) {
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segList.appendItem(seg);
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} else {
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segList.appendItem(arr[i]);
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}
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}
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}
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};
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svgedit.path.getSegSelector = function(seg, update) {
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var index = seg.index;
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var segLine = svgedit.utilities.getElem('segline_' + index);
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if (!segLine) {
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var pointGripContainer = svgedit.path.getGripContainer();
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// create segline
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segLine = document.createElementNS(NS.SVG, 'path');
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svgedit.utilities.assignAttributes(segLine, {
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'id': 'segline_' + index,
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'display': 'none',
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'fill': 'none',
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'stroke': '#0FF',
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'stroke-width': 2,
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'style':'pointer-events:none',
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'd': 'M0,0 0,0'
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});
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pointGripContainer.appendChild(segLine);
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}
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if (update) {
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var prev = seg.prev;
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if (!prev) {
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segLine.setAttribute('display', 'none');
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return segLine;
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}
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var pt = svgedit.path.getGripPt(prev);
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// Set start point
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svgedit.path.replacePathSeg(2, 0, [pt.x, pt.y], segLine);
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var pts = svgedit.path.ptObjToArr(seg.type, seg.item, true);
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var i;
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for (i = 0; i < pts.length; i += 2) {
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pt = svgedit.path.getGripPt(seg, {x:pts[i], y:pts[i+1]});
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pts[i] = pt.x;
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pts[i+1] = pt.y;
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}
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svgedit.path.replacePathSeg(seg.type, 1, pts, segLine);
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}
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return segLine;
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};
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// Function: smoothControlPoints
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// Takes three points and creates a smoother line based on them
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//
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// Parameters:
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// ct1 - Object with x and y values (first control point)
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// ct2 - Object with x and y values (second control point)
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// pt - Object with x and y values (third point)
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//
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// Returns:
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// Array of two "smoothed" point objects
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svgedit.path.smoothControlPoints = function(ct1, ct2, pt) {
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// each point must not be the origin
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var x1 = ct1.x - pt.x,
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y1 = ct1.y - pt.y,
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x2 = ct2.x - pt.x,
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y2 = ct2.y - pt.y;
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if ( (x1 != 0 || y1 != 0) && (x2 != 0 || y2 != 0) ) {
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var anglea = Math.atan2(y1, x1),
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angleb = Math.atan2(y2, x2),
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r1 = Math.sqrt(x1*x1+y1*y1),
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r2 = Math.sqrt(x2*x2+y2*y2),
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nct1 = editorContext_.getSVGRoot().createSVGPoint(),
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nct2 = editorContext_.getSVGRoot().createSVGPoint();
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if (anglea < 0) { anglea += 2*Math.PI; }
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if (angleb < 0) { angleb += 2*Math.PI; }
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var angleBetween = Math.abs(anglea - angleb),
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angleDiff = Math.abs(Math.PI - angleBetween)/2;
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var new_anglea, new_angleb;
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if (anglea - angleb > 0) {
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new_anglea = angleBetween < Math.PI ? (anglea + angleDiff) : (anglea - angleDiff);
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new_angleb = angleBetween < Math.PI ? (angleb - angleDiff) : (angleb + angleDiff);
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}
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else {
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new_anglea = angleBetween < Math.PI ? (anglea - angleDiff) : (anglea + angleDiff);
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new_angleb = angleBetween < Math.PI ? (angleb + angleDiff) : (angleb - angleDiff);
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}
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// rotate the points
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nct1.x = r1 * Math.cos(new_anglea) + pt.x;
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nct1.y = r1 * Math.sin(new_anglea) + pt.y;
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nct2.x = r2 * Math.cos(new_angleb) + pt.x;
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nct2.y = r2 * Math.sin(new_angleb) + pt.y;
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return [nct1, nct2];
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}
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return undefined;
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};
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svgedit.path.Segment = function(index, item) {
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this.selected = false;
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this.index = index;
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this.item = item;
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this.type = item.pathSegType;
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this.ctrlpts = [];
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this.ptgrip = null;
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this.segsel = null;
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};
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svgedit.path.Segment.prototype.showCtrlPts = function(y) {
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var i;
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for (i in this.ctrlpts) {
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if (this.ctrlpts.hasOwnProperty(i)) {
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this.ctrlpts[i].setAttribute('display', y ? 'inline' : 'none');
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}
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}
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};
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svgedit.path.Segment.prototype.selectCtrls = function(y) {
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$('#ctrlpointgrip_' + this.index + 'c1, #ctrlpointgrip_' + this.index + 'c2').
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attr('fill', y ? '#0FF' : '#EEE');
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};
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svgedit.path.Segment.prototype.show = function(y) {
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if (this.ptgrip) {
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this.ptgrip.setAttribute('display', y ? 'inline' : 'none');
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this.segsel.setAttribute('display', y ? 'inline' : 'none');
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// Show/hide all control points if available
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this.showCtrlPts(y);
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}
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};
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svgedit.path.Segment.prototype.select = function(y) {
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if (this.ptgrip) {
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this.ptgrip.setAttribute('stroke', y ? '#0FF' : '#00F');
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this.segsel.setAttribute('display', y ? 'inline' : 'none');
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if (this.ctrlpts) {
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this.selectCtrls(y);
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}
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this.selected = y;
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}
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};
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svgedit.path.Segment.prototype.addGrip = function() {
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this.ptgrip = svgedit.path.getPointGrip(this, true);
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this.ctrlpts = svgedit.path.getControlPoints(this, true);
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this.segsel = svgedit.path.getSegSelector(this, true);
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};
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svgedit.path.Segment.prototype.update = function(full) {
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if (this.ptgrip) {
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var pt = svgedit.path.getGripPt(this);
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svgedit.utilities.assignAttributes(this.ptgrip, {
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'cx': pt.x,
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'cy': pt.y
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});
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svgedit.path.getSegSelector(this, true);
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if (this.ctrlpts) {
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if (full) {
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this.item = svgedit.path.path.elem.pathSegList.getItem(this.index);
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this.type = this.item.pathSegType;
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}
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svgedit.path.getControlPoints(this);
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}
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// this.segsel.setAttribute('display', y?'inline':'none');
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}
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};
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svgedit.path.Segment.prototype.move = function(dx, dy) {
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var cur_pts, item = this.item;
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if (this.ctrlpts) {
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cur_pts = [item.x += dx, item.y += dy,
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item.x1, item.y1, item.x2 += dx, item.y2 += dy];
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} else {
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cur_pts = [item.x += dx, item.y += dy];
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}
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svgedit.path.replacePathSeg(this.type, this.index, cur_pts);
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if (this.next && this.next.ctrlpts) {
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var next = this.next.item;
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var next_pts = [next.x, next.y,
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next.x1 += dx, next.y1 += dy, next.x2, next.y2];
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svgedit.path.replacePathSeg(this.next.type, this.next.index, next_pts);
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}
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if (this.mate) {
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// The last point of a closed subpath has a 'mate',
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// which is the 'M' segment of the subpath
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item = this.mate.item;
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var pts = [item.x += dx, item.y += dy];
|
|
svgedit.path.replacePathSeg(this.mate.type, this.mate.index, pts);
|
|
// Has no grip, so does not need 'updating'?
|
|
}
|
|
|
|
this.update(true);
|
|
if (this.next) {this.next.update(true);}
|
|
};
|
|
|
|
svgedit.path.Segment.prototype.setLinked = function(num) {
|
|
var seg, anum, pt;
|
|
if (num == 2) {
|
|
anum = 1;
|
|
seg = this.next;
|
|
if (!seg) {return;}
|
|
pt = this.item;
|
|
} else {
|
|
anum = 2;
|
|
seg = this.prev;
|
|
if (!seg) {return;}
|
|
pt = seg.item;
|
|
}
|
|
|
|
var item = seg.item;
|
|
|
|
item['x' + anum] = pt.x + (pt.x - this.item['x' + num]);
|
|
item['y' + anum] = pt.y + (pt.y - this.item['y' + num]);
|
|
|
|
var pts = [item.x, item.y,
|
|
item.x1, item.y1,
|
|
item.x2, item.y2];
|
|
|
|
svgedit.path.replacePathSeg(seg.type, seg.index, pts);
|
|
seg.update(true);
|
|
};
|
|
|
|
svgedit.path.Segment.prototype.moveCtrl = function(num, dx, dy) {
|
|
var item = this.item;
|
|
|
|
item['x' + num] += dx;
|
|
item['y' + num] += dy;
|
|
|
|
var pts = [item.x, item.y, item.x1, item.y1, item.x2, item.y2];
|
|
|
|
svgedit.path.replacePathSeg(this.type, this.index, pts);
|
|
this.update(true);
|
|
};
|
|
|
|
svgedit.path.Segment.prototype.setType = function(new_type, pts) {
|
|
svgedit.path.replacePathSeg(new_type, this.index, pts);
|
|
this.type = new_type;
|
|
this.item = svgedit.path.path.elem.pathSegList.getItem(this.index);
|
|
this.showCtrlPts(new_type === 6);
|
|
this.ctrlpts = svgedit.path.getControlPoints(this);
|
|
this.update(true);
|
|
};
|
|
|
|
svgedit.path.Path = function(elem) {
|
|
if (!elem || elem.tagName !== 'path') {
|
|
throw 'svgedit.path.Path constructed without a <path> element';
|
|
}
|
|
|
|
this.elem = elem;
|
|
this.segs = [];
|
|
this.selected_pts = [];
|
|
svgedit.path.path = this;
|
|
|
|
this.init();
|
|
};
|
|
|
|
// Reset path data
|
|
svgedit.path.Path.prototype.init = function() {
|
|
// Hide all grips, etc
|
|
$(svgedit.path.getGripContainer()).find('*').attr('display', 'none');
|
|
var segList = this.elem.pathSegList;
|
|
var len = segList.numberOfItems;
|
|
this.segs = [];
|
|
this.selected_pts = [];
|
|
this.first_seg = null;
|
|
|
|
// Set up segs array
|
|
var i;
|
|
for (i = 0; i < len; i++) {
|
|
var item = segList.getItem(i);
|
|
var segment = new svgedit.path.Segment(i, item);
|
|
segment.path = this;
|
|
this.segs.push(segment);
|
|
}
|
|
|
|
var segs = this.segs;
|
|
var start_i = null;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
var seg = segs[i];
|
|
var next_seg = (i+1) >= len ? null : segs[i+1];
|
|
var prev_seg = (i-1) < 0 ? null : segs[i-1];
|
|
var start_seg;
|
|
if (seg.type === 2) {
|
|
if (prev_seg && prev_seg.type !== 1) {
|
|
// New sub-path, last one is open,
|
|
// so add a grip to last sub-path's first point
|
|
start_seg = segs[start_i];
|
|
start_seg.next = segs[start_i+1];
|
|
start_seg.next.prev = start_seg;
|
|
start_seg.addGrip();
|
|
}
|
|
// Remember that this is a starter seg
|
|
start_i = i;
|
|
} else if (next_seg && next_seg.type === 1) {
|
|
// This is the last real segment of a closed sub-path
|
|
// Next is first seg after "M"
|
|
seg.next = segs[start_i+1];
|
|
|
|
// First seg after "M"'s prev is this
|
|
seg.next.prev = seg;
|
|
seg.mate = segs[start_i];
|
|
seg.addGrip();
|
|
if (this.first_seg == null) {
|
|
this.first_seg = seg;
|
|
}
|
|
} else if (!next_seg) {
|
|
if (seg.type !== 1) {
|
|
// Last seg, doesn't close so add a grip
|
|
// to last sub-path's first point
|
|
start_seg = segs[start_i];
|
|
start_seg.next = segs[start_i+1];
|
|
start_seg.next.prev = start_seg;
|
|
start_seg.addGrip();
|
|
seg.addGrip();
|
|
|
|
if (!this.first_seg) {
|
|
// Open path, so set first as real first and add grip
|
|
this.first_seg = segs[start_i];
|
|
}
|
|
}
|
|
} else if (seg.type !== 1){
|
|
// Regular segment, so add grip and its "next"
|
|
seg.addGrip();
|
|
|
|
// Don't set its "next" if it's an "M"
|
|
if (next_seg && next_seg.type !== 2) {
|
|
seg.next = next_seg;
|
|
seg.next.prev = seg;
|
|
}
|
|
}
|
|
}
|
|
return this;
|
|
};
|
|
|
|
svgedit.path.Path.prototype.eachSeg = function(fn) {
|
|
var i;
|
|
var len = this.segs.length;
|
|
for (i = 0; i < len; i++) {
|
|
var ret = fn.call(this.segs[i], i);
|
|
if (ret === false) {break;}
|
|
}
|
|
};
|
|
|
|
svgedit.path.Path.prototype.addSeg = function(index) {
|
|
// Adds a new segment
|
|
var seg = this.segs[index];
|
|
if (!seg.prev) {return;}
|
|
|
|
var prev = seg.prev;
|
|
var newseg, new_x, new_y;
|
|
switch(seg.item.pathSegType) {
|
|
case 4:
|
|
new_x = (seg.item.x + prev.item.x) / 2;
|
|
new_y = (seg.item.y + prev.item.y) / 2;
|
|
newseg = this.elem.createSVGPathSegLinetoAbs(new_x, new_y);
|
|
break;
|
|
case 6: //make it a curved segment to preserve the shape (WRS)
|
|
// http://en.wikipedia.org/wiki/De_Casteljau%27s_algorithm#Geometric_interpretation
|
|
var p0_x = (prev.item.x + seg.item.x1)/2;
|
|
var p1_x = (seg.item.x1 + seg.item.x2)/2;
|
|
var p2_x = (seg.item.x2 + seg.item.x)/2;
|
|
var p01_x = (p0_x + p1_x)/2;
|
|
var p12_x = (p1_x + p2_x)/2;
|
|
new_x = (p01_x + p12_x)/2;
|
|
var p0_y = (prev.item.y + seg.item.y1)/2;
|
|
var p1_y = (seg.item.y1 + seg.item.y2)/2;
|
|
var p2_y = (seg.item.y2 + seg.item.y)/2;
|
|
var p01_y = (p0_y + p1_y)/2;
|
|
var p12_y = (p1_y + p2_y)/2;
|
|
new_y = (p01_y + p12_y)/2;
|
|
newseg = this.elem.createSVGPathSegCurvetoCubicAbs(new_x, new_y, p0_x, p0_y, p01_x, p01_y);
|
|
var pts = [seg.item.x, seg.item.y, p12_x, p12_y, p2_x, p2_y];
|
|
svgedit.path.replacePathSeg(seg.type, index, pts);
|
|
break;
|
|
}
|
|
|
|
svgedit.path.insertItemBefore(this.elem, newseg, index);
|
|
};
|
|
|
|
svgedit.path.Path.prototype.deleteSeg = function(index) {
|
|
var seg = this.segs[index];
|
|
var list = this.elem.pathSegList;
|
|
|
|
seg.show(false);
|
|
var next = seg.next;
|
|
var pt;
|
|
if (seg.mate) {
|
|
// Make the next point be the "M" point
|
|
pt = [next.item.x, next.item.y];
|
|
svgedit.path.replacePathSeg(2, next.index, pt);
|
|
|
|
// Reposition last node
|
|
svgedit.path.replacePathSeg(4, seg.index, pt);
|
|
|
|
list.removeItem(seg.mate.index);
|
|
} else if (!seg.prev) {
|
|
// First node of open path, make next point the M
|
|
var item = seg.item;
|
|
pt = [next.item.x, next.item.y];
|
|
svgedit.path.replacePathSeg(2, seg.next.index, pt);
|
|
list.removeItem(index);
|
|
} else {
|
|
list.removeItem(index);
|
|
}
|
|
};
|
|
|
|
svgedit.path.Path.prototype.subpathIsClosed = function(index) {
|
|
var closed = false;
|
|
// Check if subpath is already open
|
|
svgedit.path.path.eachSeg(function(i) {
|
|
if (i <= index) {return true;}
|
|
if (this.type === 2) {
|
|
// Found M first, so open
|
|
return false;
|
|
}
|
|
if (this.type === 1) {
|
|
// Found Z first, so closed
|
|
closed = true;
|
|
return false;
|
|
}
|
|
});
|
|
|
|
return closed;
|
|
};
|
|
|
|
svgedit.path.Path.prototype.removePtFromSelection = function(index) {
|
|
var pos = this.selected_pts.indexOf(index);
|
|
if (pos == -1) {
|
|
return;
|
|
}
|
|
this.segs[index].select(false);
|
|
this.selected_pts.splice(pos, 1);
|
|
};
|
|
|
|
svgedit.path.Path.prototype.clearSelection = function() {
|
|
this.eachSeg(function() {
|
|
// 'this' is the segment here
|
|
this.select(false);
|
|
});
|
|
this.selected_pts = [];
|
|
};
|
|
|
|
svgedit.path.Path.prototype.storeD = function() {
|
|
this.last_d = this.elem.getAttribute('d');
|
|
};
|
|
|
|
svgedit.path.Path.prototype.show = function(y) {
|
|
// Shows this path's segment grips
|
|
this.eachSeg(function() {
|
|
// 'this' is the segment here
|
|
this.show(y);
|
|
});
|
|
if (y) {
|
|
this.selectPt(this.first_seg.index);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
// Move selected points
|
|
svgedit.path.Path.prototype.movePts = function(d_x, d_y) {
|
|
var i = this.selected_pts.length;
|
|
while(i--) {
|
|
var seg = this.segs[this.selected_pts[i]];
|
|
seg.move(d_x, d_y);
|
|
}
|
|
};
|
|
|
|
svgedit.path.Path.prototype.moveCtrl = function(d_x, d_y) {
|
|
var seg = this.segs[this.selected_pts[0]];
|
|
seg.moveCtrl(this.dragctrl, d_x, d_y);
|
|
if (link_control_pts) {
|
|
seg.setLinked(this.dragctrl);
|
|
}
|
|
};
|
|
|
|
svgedit.path.Path.prototype.setSegType = function(new_type) {
|
|
this.storeD();
|
|
var i = this.selected_pts.length;
|
|
var text;
|
|
while(i--) {
|
|
var sel_pt = this.selected_pts[i];
|
|
|
|
// Selected seg
|
|
var cur = this.segs[sel_pt];
|
|
var prev = cur.prev;
|
|
if (!prev) {continue;}
|
|
|
|
if (!new_type) { // double-click, so just toggle
|
|
text = 'Toggle Path Segment Type';
|
|
|
|
// Toggle segment to curve/straight line
|
|
var old_type = cur.type;
|
|
|
|
new_type = (old_type == 6) ? 4 : 6;
|
|
}
|
|
|
|
new_type = Number(new_type);
|
|
|
|
var cur_x = cur.item.x;
|
|
var cur_y = cur.item.y;
|
|
var prev_x = prev.item.x;
|
|
var prev_y = prev.item.y;
|
|
var points;
|
|
switch ( new_type ) {
|
|
case 6:
|
|
if (cur.olditem) {
|
|
var old = cur.olditem;
|
|
points = [cur_x, cur_y, old.x1, old.y1, old.x2, old.y2];
|
|
} else {
|
|
var diff_x = cur_x - prev_x;
|
|
var diff_y = cur_y - prev_y;
|
|
// get control points from straight line segment
|
|
/*
|
|
var ct1_x = (prev_x + (diff_y/2));
|
|
var ct1_y = (prev_y - (diff_x/2));
|
|
var ct2_x = (cur_x + (diff_y/2));
|
|
var ct2_y = (cur_y - (diff_x/2));
|
|
*/
|
|
//create control points on the line to preserve the shape (WRS)
|
|
var ct1_x = (prev_x + (diff_x/3));
|
|
var ct1_y = (prev_y + (diff_y/3));
|
|
var ct2_x = (cur_x - (diff_x/3));
|
|
var ct2_y = (cur_y - (diff_y/3));
|
|
points = [cur_x, cur_y, ct1_x, ct1_y, ct2_x, ct2_y];
|
|
}
|
|
break;
|
|
case 4:
|
|
points = [cur_x, cur_y];
|
|
|
|
// Store original prevve segment nums
|
|
cur.olditem = cur.item;
|
|
break;
|
|
}
|
|
|
|
cur.setType(new_type, points);
|
|
}
|
|
svgedit.path.path.endChanges(text);
|
|
};
|
|
|
|
svgedit.path.Path.prototype.selectPt = function(pt, ctrl_num) {
|
|
this.clearSelection();
|
|
if (pt == null) {
|
|
this.eachSeg(function(i) {
|
|
// 'this' is the segment here.
|
|
if (this.prev) {
|
|
pt = i;
|
|
}
|
|
});
|
|
}
|
|
this.addPtsToSelection(pt);
|
|
if (ctrl_num) {
|
|
this.dragctrl = ctrl_num;
|
|
|
|
if (link_control_pts) {
|
|
this.segs[pt].setLinked(ctrl_num);
|
|
}
|
|
}
|
|
};
|
|
|
|
// Update position of all points
|
|
svgedit.path.Path.prototype.update = function() {
|
|
var elem = this.elem;
|
|
if (svgedit.utilities.getRotationAngle(elem)) {
|
|
this.matrix = svgedit.math.getMatrix(elem);
|
|
this.imatrix = this.matrix.inverse();
|
|
} else {
|
|
this.matrix = null;
|
|
this.imatrix = null;
|
|
}
|
|
|
|
this.eachSeg(function(i) {
|
|
this.item = elem.pathSegList.getItem(i);
|
|
this.update();
|
|
});
|
|
|
|
return this;
|
|
};
|
|
|
|
svgedit.path.getPath_ = function(elem) {
|
|
var p = pathData[elem.id];
|
|
if (!p) {
|
|
p = pathData[elem.id] = new svgedit.path.Path(elem);
|
|
}
|
|
return p;
|
|
};
|
|
|
|
svgedit.path.removePath_ = function(id) {
|
|
if (id in pathData) {delete pathData[id];}
|
|
};
|
|
var newcx, newcy, oldcx, oldcy, angle;
|
|
var getRotVals = function(x, y) {
|
|
var dx = x - oldcx;
|
|
var dy = y - oldcy;
|
|
|
|
// rotate the point around the old center
|
|
var r = Math.sqrt(dx*dx + dy*dy);
|
|
var theta = Math.atan2(dy, dx) + angle;
|
|
dx = r * Math.cos(theta) + oldcx;
|
|
dy = r * Math.sin(theta) + oldcy;
|
|
|
|
// dx,dy should now hold the actual coordinates of each
|
|
// point after being rotated
|
|
|
|
// now we want to rotate them around the new center in the reverse direction
|
|
dx -= newcx;
|
|
dy -= newcy;
|
|
|
|
r = Math.sqrt(dx*dx + dy*dy);
|
|
theta = Math.atan2(dy, dx) - angle;
|
|
|
|
return {'x': r * Math.cos(theta) + newcx,
|
|
'y': r * Math.sin(theta) + newcy};
|
|
};
|
|
|
|
// If the path was rotated, we must now pay the piper:
|
|
// Every path point must be rotated into the rotated coordinate system of
|
|
// its old center, then determine the new center, then rotate it back
|
|
// This is because we want the path to remember its rotation
|
|
|
|
// TODO: This is still using ye olde transform methods, can probably
|
|
// be optimized or even taken care of by recalculateDimensions
|
|
svgedit.path.recalcRotatedPath = function() {
|
|
var current_path = svgedit.path.path.elem;
|
|
angle = svgedit.utilities.getRotationAngle(current_path, true);
|
|
if (!angle) {return;}
|
|
// selectedBBoxes[0] = svgedit.path.path.oldbbox;
|
|
var box = svgedit.utilities.getBBox(current_path),
|
|
oldbox = svgedit.path.path.oldbbox; //selectedBBoxes[0],
|
|
oldcx = oldbox.x + oldbox.width/2;
|
|
oldcy = oldbox.y + oldbox.height/2;
|
|
newcx = box.x + box.width/2;
|
|
newcy = box.y + box.height/2;
|
|
|
|
// un-rotate the new center to the proper position
|
|
var dx = newcx - oldcx,
|
|
dy = newcy - oldcy,
|
|
r = Math.sqrt(dx*dx + dy*dy),
|
|
theta = Math.atan2(dy, dx) + angle;
|
|
|
|
newcx = r * Math.cos(theta) + oldcx;
|
|
newcy = r * Math.sin(theta) + oldcy;
|
|
|
|
var list = current_path.pathSegList,
|
|
i = list.numberOfItems;
|
|
while (i) {
|
|
i -= 1;
|
|
var seg = list.getItem(i),
|
|
type = seg.pathSegType;
|
|
if (type == 1) {continue;}
|
|
|
|
var rvals = getRotVals(seg.x, seg.y),
|
|
points = [rvals.x, rvals.y];
|
|
if (seg.x1 != null && seg.x2 != null) {
|
|
var c_vals1 = getRotVals(seg.x1, seg.y1);
|
|
var c_vals2 = getRotVals(seg.x2, seg.y2);
|
|
points.splice(points.length, 0, c_vals1.x , c_vals1.y, c_vals2.x, c_vals2.y);
|
|
}
|
|
svgedit.path.replacePathSeg(type, i, points);
|
|
} // loop for each point
|
|
|
|
box = svgedit.utilities.getBBox(current_path);
|
|
// selectedBBoxes[0].x = box.x; selectedBBoxes[0].y = box.y;
|
|
// selectedBBoxes[0].width = box.width; selectedBBoxes[0].height = box.height;
|
|
|
|
// now we must set the new transform to be rotated around the new center
|
|
var R_nc = svgroot.createSVGTransform(),
|
|
tlist = svgedit.transformlist.getTransformList(current_path);
|
|
R_nc.setRotate((angle * 180.0 / Math.PI), newcx, newcy);
|
|
tlist.replaceItem(R_nc,0);
|
|
};
|
|
|
|
// ====================================
|
|
// Public API starts here
|
|
|
|
svgedit.path.clearData = function() {
|
|
pathData = {};
|
|
};
|
|
|
|
}());
|