Current File : //proc/self/root/home/tjamichg/cursos.tjamich.gob.mx/main/inc/lib/javascript/svgedit/path.js
/*globals $, svgedit, svgroot*/
/*jslint vars: true, eqeq: true, continue: true*/
/**
* Package: svgedit.path
*
* Licensed under the MIT License
*
* Copyright(c) 2011 Alexis Deveria
* Copyright(c) 2011 Jeff Schiller
*/
// Dependencies:
// 1) jQuery
// 2) browser.js
// 3) math.js
// 4) svgutils.js
(function() {'use strict';
if (!svgedit.path) {
svgedit.path = {};
}
var NS = svgedit.NS;
var uiStrings = {
'pathNodeTooltip': 'Drag node to move it. Double-click node to change segment type',
'pathCtrlPtTooltip': 'Drag control point to adjust curve properties'
};
var segData = {
2: ['x', 'y'],
4: ['x', 'y'],
6: ['x', 'y', 'x1', 'y1', 'x2', 'y2'],
8: ['x', 'y', 'x1', 'y1'],
10: ['x', 'y', 'r1', 'r2', 'angle', 'largeArcFlag', 'sweepFlag'],
12: ['x'],
14: ['y'],
16: ['x', 'y', 'x2', 'y2'],
18: ['x', 'y']
};
var pathFuncs = [];
var link_control_pts = true;
// Stores references to paths via IDs.
// TODO: Make this cross-document happy.
var pathData = {};
svgedit.path.setLinkControlPoints = function(lcp) {
link_control_pts = lcp;
};
svgedit.path.path = null;
var editorContext_ = null;
svgedit.path.init = function(editorContext) {
editorContext_ = editorContext;
pathFuncs = [0, 'ClosePath'];
var pathFuncsStrs = ['Moveto', 'Lineto', 'CurvetoCubic', 'CurvetoQuadratic', 'Arc',
'LinetoHorizontal', 'LinetoVertical', 'CurvetoCubicSmooth', 'CurvetoQuadraticSmooth'];
$.each(pathFuncsStrs, function(i, s) {
pathFuncs.push(s+'Abs');
pathFuncs.push(s+'Rel');
});
};
svgedit.path.insertItemBefore = function(elem, newseg, index) {
// Support insertItemBefore on paths for FF2
var list = elem.pathSegList;
if (svgedit.browser.supportsPathInsertItemBefore()) {
list.insertItemBefore(newseg, index);
return;
}
var len = list.numberOfItems;
var arr = [];
var i;
for (i=0; i < len; i++) {
var cur_seg = list.getItem(i);
arr.push(cur_seg);
}
list.clear();
for (i=0; i < len; i++) {
if (i == index) { //index+1
list.appendItem(newseg);
}
list.appendItem(arr[i]);
}
};
// TODO: See if this should just live in replacePathSeg
svgedit.path.ptObjToArr = function(type, seg_item) {
var arr = segData[type], len = arr.length;
var i, out = [];
for (i = 0; i < len; i++) {
out[i] = seg_item[arr[i]];
}
return out;
};
svgedit.path.getGripPt = function(seg, alt_pt) {
var out = {
x: alt_pt? alt_pt.x : seg.item.x,
y: alt_pt? alt_pt.y : seg.item.y
}, path = seg.path;
if (path.matrix) {
var pt = svgedit.math.transformPoint(out.x, out.y, path.matrix);
out = pt;
}
out.x *= editorContext_.getCurrentZoom();
out.y *= editorContext_.getCurrentZoom();
return out;
};
svgedit.path.getPointFromGrip = function(pt, path) {
var out = {
x: pt.x,
y: pt.y
};
if (path.matrix) {
pt = svgedit.math.transformPoint(out.x, out.y, path.imatrix);
out.x = pt.x;
out.y = pt.y;
}
out.x /= editorContext_.getCurrentZoom();
out.y /= editorContext_.getCurrentZoom();
return out;
};
svgedit.path.addPointGrip = function(index, x, y) {
// create the container of all the point grips
var pointGripContainer = svgedit.path.getGripContainer();
var pointGrip = svgedit.utilities.getElem('pathpointgrip_'+index);
// create it
if (!pointGrip) {
pointGrip = document.createElementNS(NS.SVG, 'circle');
svgedit.utilities.assignAttributes(pointGrip, {
'id': 'pathpointgrip_' + index,
'display': 'none',
'r': 4,
'fill': '#0FF',
'stroke': '#00F',
'stroke-width': 2,
'cursor': 'move',
'style': 'pointer-events:all',
'xlink:title': uiStrings.pathNodeTooltip
});
pointGrip = pointGripContainer.appendChild(pointGrip);
var grip = $('#pathpointgrip_'+index);
grip.dblclick(function() {
if (svgedit.path.path) {
svgedit.path.path.setSegType();
}
});
}
if (x && y) {
// set up the point grip element and display it
svgedit.utilities.assignAttributes(pointGrip, {
'cx': x,
'cy': y,
'display': 'inline'
});
}
return pointGrip;
};
svgedit.path.getGripContainer = function() {
var c = svgedit.utilities.getElem('pathpointgrip_container');
if (!c) {
var parent = svgedit.utilities.getElem('selectorParentGroup');
c = parent.appendChild(document.createElementNS(NS.SVG, 'g'));
c.id = 'pathpointgrip_container';
}
return c;
};
svgedit.path.addCtrlGrip = function(id) {
var pointGrip = svgedit.utilities.getElem('ctrlpointgrip_'+id);
if (pointGrip) {return pointGrip;}
pointGrip = document.createElementNS(NS.SVG, 'circle');
svgedit.utilities.assignAttributes(pointGrip, {
'id': 'ctrlpointgrip_' + id,
'display': 'none',
'r': 4,
'fill': '#0FF',
'stroke': '#55F',
'stroke-width': 1,
'cursor': 'move',
'style': 'pointer-events:all',
'xlink:title': uiStrings.pathCtrlPtTooltip
});
svgedit.path.getGripContainer().appendChild(pointGrip);
return pointGrip;
};
svgedit.path.getCtrlLine = function(id) {
var ctrlLine = svgedit.utilities.getElem('ctrlLine_'+id);
if (ctrlLine) {return ctrlLine;}
ctrlLine = document.createElementNS(NS.SVG, 'line');
svgedit.utilities.assignAttributes(ctrlLine, {
'id': 'ctrlLine_'+id,
'stroke': '#555',
'stroke-width': 1,
'style': 'pointer-events:none'
});
svgedit.path.getGripContainer().appendChild(ctrlLine);
return ctrlLine;
};
svgedit.path.getPointGrip = function(seg, update) {
var index = seg.index;
var pointGrip = svgedit.path.addPointGrip(index);
if (update) {
var pt = svgedit.path.getGripPt(seg);
svgedit.utilities.assignAttributes(pointGrip, {
'cx': pt.x,
'cy': pt.y,
'display': 'inline'
});
}
return pointGrip;
};
svgedit.path.getControlPoints = function(seg) {
var item = seg.item;
var index = seg.index;
if (!('x1' in item) || !('x2' in item)) {return null;}
var cpt = {};
var pointGripContainer = svgedit.path.getGripContainer();
// Note that this is intentionally not seg.prev.item
var prev = svgedit.path.path.segs[index-1].item;
var seg_items = [prev, item];
var i;
for (i = 1; i < 3; i++) {
var id = index + 'c' + i;
var ctrlLine = cpt['c' + i + '_line'] = svgedit.path.getCtrlLine(id);
var pt = svgedit.path.getGripPt(seg, {x:item['x' + i], y:item['y' + i]});
var gpt = svgedit.path.getGripPt(seg, {x:seg_items[i-1].x, y:seg_items[i-1].y});
svgedit.utilities.assignAttributes(ctrlLine, {
'x1': pt.x,
'y1': pt.y,
'x2': gpt.x,
'y2': gpt.y,
'display': 'inline'
});
cpt['c' + i + '_line'] = ctrlLine;
// create it
var pointGrip = cpt['c' + i] = svgedit.path.addCtrlGrip(id);
svgedit.utilities.assignAttributes(pointGrip, {
'cx': pt.x,
'cy': pt.y,
'display': 'inline'
});
cpt['c' + i] = pointGrip;
}
return cpt;
};
// This replaces the segment at the given index. Type is given as number.
svgedit.path.replacePathSeg = function(type, index, pts, elem) {
var path = elem || svgedit.path.path.elem;
var func = 'createSVGPathSeg' + pathFuncs[type];
var seg = path[func].apply(path, pts);
if (svgedit.browser.supportsPathReplaceItem()) {
path.pathSegList.replaceItem(seg, index);
} else {
var segList = path.pathSegList;
var len = segList.numberOfItems;
var arr = [];
var i;
for (i = 0; i < len; i++) {
var cur_seg = segList.getItem(i);
arr.push(cur_seg);
}
segList.clear();
for (i = 0; i < len; i++) {
if (i == index) {
segList.appendItem(seg);
} else {
segList.appendItem(arr[i]);
}
}
}
};
svgedit.path.getSegSelector = function(seg, update) {
var index = seg.index;
var segLine = svgedit.utilities.getElem('segline_' + index);
if (!segLine) {
var pointGripContainer = svgedit.path.getGripContainer();
// create segline
segLine = document.createElementNS(NS.SVG, 'path');
svgedit.utilities.assignAttributes(segLine, {
'id': 'segline_' + index,
'display': 'none',
'fill': 'none',
'stroke': '#0FF',
'stroke-width': 2,
'style':'pointer-events:none',
'd': 'M0,0 0,0'
});
pointGripContainer.appendChild(segLine);
}
if (update) {
var prev = seg.prev;
if (!prev) {
segLine.setAttribute('display', 'none');
return segLine;
}
var pt = svgedit.path.getGripPt(prev);
// Set start point
svgedit.path.replacePathSeg(2, 0, [pt.x, pt.y], segLine);
var pts = svgedit.path.ptObjToArr(seg.type, seg.item, true);
var i;
for (i = 0; i < pts.length; i += 2) {
pt = svgedit.path.getGripPt(seg, {x:pts[i], y:pts[i+1]});
pts[i] = pt.x;
pts[i+1] = pt.y;
}
svgedit.path.replacePathSeg(seg.type, 1, pts, segLine);
}
return segLine;
};
// Function: smoothControlPoints
// Takes three points and creates a smoother line based on them
//
// Parameters:
// ct1 - Object with x and y values (first control point)
// ct2 - Object with x and y values (second control point)
// pt - Object with x and y values (third point)
//
// Returns:
// Array of two "smoothed" point objects
svgedit.path.smoothControlPoints = function(ct1, ct2, pt) {
// each point must not be the origin
var x1 = ct1.x - pt.x,
y1 = ct1.y - pt.y,
x2 = ct2.x - pt.x,
y2 = ct2.y - pt.y;
if ( (x1 != 0 || y1 != 0) && (x2 != 0 || y2 != 0) ) {
var anglea = Math.atan2(y1, x1),
angleb = Math.atan2(y2, x2),
r1 = Math.sqrt(x1*x1+y1*y1),
r2 = Math.sqrt(x2*x2+y2*y2),
nct1 = editorContext_.getSVGRoot().createSVGPoint(),
nct2 = editorContext_.getSVGRoot().createSVGPoint();
if (anglea < 0) { anglea += 2*Math.PI; }
if (angleb < 0) { angleb += 2*Math.PI; }
var angleBetween = Math.abs(anglea - angleb),
angleDiff = Math.abs(Math.PI - angleBetween)/2;
var new_anglea, new_angleb;
if (anglea - angleb > 0) {
new_anglea = angleBetween < Math.PI ? (anglea + angleDiff) : (anglea - angleDiff);
new_angleb = angleBetween < Math.PI ? (angleb - angleDiff) : (angleb + angleDiff);
}
else {
new_anglea = angleBetween < Math.PI ? (anglea - angleDiff) : (anglea + angleDiff);
new_angleb = angleBetween < Math.PI ? (angleb + angleDiff) : (angleb - angleDiff);
}
// rotate the points
nct1.x = r1 * Math.cos(new_anglea) + pt.x;
nct1.y = r1 * Math.sin(new_anglea) + pt.y;
nct2.x = r2 * Math.cos(new_angleb) + pt.x;
nct2.y = r2 * Math.sin(new_angleb) + pt.y;
return [nct1, nct2];
}
return undefined;
};
svgedit.path.Segment = function(index, item) {
this.selected = false;
this.index = index;
this.item = item;
this.type = item.pathSegType;
this.ctrlpts = [];
this.ptgrip = null;
this.segsel = null;
};
svgedit.path.Segment.prototype.showCtrlPts = function(y) {
var i;
for (i in this.ctrlpts) {
if (this.ctrlpts.hasOwnProperty(i)) {
this.ctrlpts[i].setAttribute('display', y ? 'inline' : 'none');
}
}
};
svgedit.path.Segment.prototype.selectCtrls = function(y) {
$('#ctrlpointgrip_' + this.index + 'c1, #ctrlpointgrip_' + this.index + 'c2').
attr('fill', y ? '#0FF' : '#EEE');
};
svgedit.path.Segment.prototype.show = function(y) {
if (this.ptgrip) {
this.ptgrip.setAttribute('display', y ? 'inline' : 'none');
this.segsel.setAttribute('display', y ? 'inline' : 'none');
// Show/hide all control points if available
this.showCtrlPts(y);
}
};
svgedit.path.Segment.prototype.select = function(y) {
if (this.ptgrip) {
this.ptgrip.setAttribute('stroke', y ? '#0FF' : '#00F');
this.segsel.setAttribute('display', y ? 'inline' : 'none');
if (this.ctrlpts) {
this.selectCtrls(y);
}
this.selected = y;
}
};
svgedit.path.Segment.prototype.addGrip = function() {
this.ptgrip = svgedit.path.getPointGrip(this, true);
this.ctrlpts = svgedit.path.getControlPoints(this, true);
this.segsel = svgedit.path.getSegSelector(this, true);
};
svgedit.path.Segment.prototype.update = function(full) {
if (this.ptgrip) {
var pt = svgedit.path.getGripPt(this);
svgedit.utilities.assignAttributes(this.ptgrip, {
'cx': pt.x,
'cy': pt.y
});
svgedit.path.getSegSelector(this, true);
if (this.ctrlpts) {
if (full) {
this.item = svgedit.path.path.elem.pathSegList.getItem(this.index);
this.type = this.item.pathSegType;
}
svgedit.path.getControlPoints(this);
}
// this.segsel.setAttribute('display', y?'inline':'none');
}
};
svgedit.path.Segment.prototype.move = function(dx, dy) {
var cur_pts, item = this.item;
// fix for path tool dom breakage, amending item does bad things now, so we take a copy and use that. Can probably improve to just take a shallow copy of object
var cloneItem = $.extend({}, item);
if (this.ctrlpts) {
cur_pts = [cloneItem.x += dx, cloneItem.y += dy,
cloneItem.x1, cloneItem.y1, cloneItem.x2 += dx, cloneItem.y2 += dy];
} else {
cur_pts = [cloneItem.x += dx, cloneItem.y += dy];
}
//fix
svgedit.path.replacePathSeg(this.type, this.index, cur_pts);
if (this.next && this.next.ctrlpts) {
var next = this.next.item;
var next_pts = [next.x, next.y,
next.x1 += dx, next.y1 += dy, next.x2, next.y2];
svgedit.path.replacePathSeg(this.next.type, this.next.index, next_pts);
}
if (this.mate) {
// The last point of a closed subpath has a 'mate',
// which is the 'M' segment of the subpath
item = this.mate.item;
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;
// fix for path tool dom breakage, amending item does bad things now, so we take a copy and use that. Can probably improve to just take a shallow copy of object
var cloneItem = $.extend({}, item);
cloneItem['x' + anum ] = pt.x + (pt.x - this.item['x' + num]);
cloneItem['y' + anum ] = pt.y + (pt.y - this.item['y' + num]);
var pts = [cloneItem.x, cloneItem.y,
cloneItem.x1, cloneItem.y1,
cloneItem.x2, cloneItem.y2];
//end fix
svgedit.path.replacePathSeg(seg.type, seg.index, pts);
seg.update(true);
};
svgedit.path.Segment.prototype.moveCtrl = function(num, dx, dy) {
var item = this.item;
// fix for path tool dom breakage, amending item does bad things now, so we take a copy and use that. Can probably improve to just take a shallow copy of object
var cloneItem = $.extend({}, item);
cloneItem['x' + num] += dx;
cloneItem['y' + num] += dy;
var pts = [cloneItem.x,cloneItem.y,
cloneItem.x1,cloneItem.y1, cloneItem.x2,cloneItem.y2];
// end fix
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
//fixed, needed to work on all found elements, not just first
$(svgedit.path.getGripContainer()).find('*').each( function() { $(this).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 = {};
};
}());
Mini Shell