/*
* svgcanvas.js
*
* Licensed under the Apache License, Version 2
*
* Copyright(c) 2010 Alexis Deveria
* Copyright(c) 2010 Pavol Rusnak
* Copyright(c) 2010 Jeff Schiller
*
*/
if(!window.console) {
window.console = {};
window.console.log = function(str) {};
window.console.dir = function(str) {};
}
if(window.opera) {
window.console.log = function(str) {opera.postError(str);};
window.console.dir = function(str) {};
}
(function() {
// This fixes $(...).attr() to work as expected with SVG elements.
// Does not currently use *AttributeNS() since we rarely need that.
// See http://api.jquery.com/attr/ for basic documentation of .attr()
// Additional functionality:
// - When getting attributes, a string that's a number is return as type number.
// - If an array is supplied as first parameter, multiple values are returned
// as an object with values for each given attributes
var proxied = jQuery.fn.attr, svgns = "http://www.w3.org/2000/svg";
jQuery.fn.attr = function(key, value) {
var len = this.length;
if(!len) return this;
for(var i=0; i').text(str).html();
},
fromXml = function(str) {
return $('').html(str).text();
};
var unit_types = {'em':0,'ex':0,'px':1,'cm':35.43307,'mm':3.543307,'in':90,'pt':1.25,'pc':15,'%':0};
// These command objects are used for the Undo/Redo stack
// attrs contains the values that the attributes had before the change
function ChangeElementCommand(elem, attrs, text) {
this.elem = elem;
this.text = text ? ("Change " + elem.tagName + " " + text) : ("Change " + elem.tagName);
this.newValues = {};
this.oldValues = attrs;
for (var attr in attrs) {
if (attr == "#text") this.newValues[attr] = elem.textContent;
else this.newValues[attr] = elem.getAttribute(attr);
}
this.apply = function() {
var bChangedTransform = false;
for(var attr in this.newValues ) {
if (this.newValues[attr]) {
if (attr == "#text") this.elem.textContent = this.newValues[attr];
else this.elem.setAttribute(attr, this.newValues[attr]);
}
else {
if (attr == "#text") this.elem.textContent = "";
else {
this.elem.setAttribute(attr, "");
this.elem.removeAttribute(attr);
}
}
if (attr == "transform") { bChangedTransform = true; }
}
// relocate rotational transform, if necessary
if(!bChangedTransform) {
var angle = canvas.getRotationAngle(elem);
if (angle) {
var bbox = elem.getBBox();
var cx = bbox.x + bbox.width/2,
cy = bbox.y + bbox.height/2;
var rotate = ["rotate(", angle, " ", cx, ",", cy, ")"].join('');
if (rotate != elem.getAttribute("transform")) {
elem.setAttribute("transform", rotate);
}
}
}
// if we are changing layer names, re-identify all layers
if (this.elem.tagName == "title" && this.elem.parentNode.parentNode == svgcontent) {
identifyLayers();
}
return true;
};
this.unapply = function() {
var bChangedTransform = false;
for(var attr in this.oldValues ) {
if (this.oldValues[attr]) {
if (attr == "#text") this.elem.textContent = this.oldValues[attr];
else this.elem.setAttribute(attr, this.oldValues[attr]);
}
else {
if (attr == "#text") this.elem.textContent = "";
else this.elem.removeAttribute(attr);
}
if (attr == "transform") { bChangedTransform = true; }
}
// relocate rotational transform, if necessary
if(!bChangedTransform) {
var angle = canvas.getRotationAngle(elem);
if (angle) {
var bbox = elem.getBBox();
var cx = bbox.x + bbox.width/2,
cy = bbox.y + bbox.height/2;
var rotate = ["rotate(", angle, " ", cx, ",", cy, ")"].join('');
if (rotate != elem.getAttribute("transform")) {
elem.setAttribute("transform", rotate);
}
}
}
// if we are changing layer names, re-identify all layers
if (this.elem.tagName == "title" && this.elem.parentNode.parentNode == svgcontent) {
identifyLayers();
}
return true;
};
this.elements = function() { return [this.elem]; }
}
function InsertElementCommand(elem, text) {
this.elem = elem;
this.text = text || ("Create " + elem.tagName);
this.parent = elem.parentNode;
this.apply = function() {
this.elem = this.parent.insertBefore(this.elem, this.elem.nextSibling);
if (this.parent == svgcontent) {
identifyLayers();
}
};
this.unapply = function() {
this.parent = this.elem.parentNode;
this.elem = this.elem.parentNode.removeChild(this.elem);
if (this.parent == svgcontent) {
identifyLayers();
}
};
this.elements = function() { return [this.elem]; };
}
// this is created for an element that has or will be removed from the DOM
// (creating this object does not remove the element from the DOM itself)
function RemoveElementCommand(elem, parent, text) {
this.elem = elem;
this.text = text || ("Delete " + elem.tagName);
this.parent = parent;
this.apply = function() {
this.parent = this.elem.parentNode;
this.elem = this.parent.removeChild(this.elem);
if (this.parent == svgcontent) {
identifyLayers();
}
};
this.unapply = function() {
this.elem = this.parent.insertBefore(this.elem, this.elem.nextSibling);
if (this.parent == svgcontent) {
identifyLayers();
}
};
this.elements = function() { return [this.elem]; };
// special hack for webkit: remove this element's entry in the svgTransformLists map
if (svgTransformLists[elem.id]) {
delete svgTransformLists[elem.id];
}
}
function MoveElementCommand(elem, oldNextSibling, oldParent, text) {
this.elem = elem;
this.text = text ? ("Move " + elem.tagName + " to " + text) : ("Move " + elem.tagName);
this.oldNextSibling = oldNextSibling;
this.oldParent = oldParent;
this.newNextSibling = elem.nextSibling;
this.newParent = elem.parentNode;
this.apply = function() {
this.elem = this.newParent.insertBefore(this.elem, this.newNextSibling);
if (this.newParent == svgcontent) {
identifyLayers();
}
};
this.unapply = function() {
this.elem = this.oldParent.insertBefore(this.elem, this.oldNextSibling);
if (this.oldParent == svgcontent) {
identifyLayers();
}
};
this.elements = function() { return [this.elem]; };
}
// TODO: create a 'typing' command object that tracks changes in text
// if a new Typing command is created and the top command on the stack is also a Typing
// and they both affect the same element, then collapse the two commands into one
// this command object acts an arbitrary number of subcommands
function BatchCommand(text) {
this.text = text || "Batch Command";
this.stack = [];
this.apply = function() {
var len = this.stack.length;
for (var i = 0; i < len; ++i) {
this.stack[i].apply();
}
};
this.unapply = function() {
for (var i = this.stack.length-1; i >= 0; i--) {
this.stack[i].unapply();
}
};
this.elements = function() {
// iterate through all our subcommands and find all the elements we are changing
var elems = [];
var cmd = this.stack.length;
while (cmd--) {
var thisElems = this.stack[cmd].elements();
var elem = thisElems.length;
while (elem--) {
if (elems.indexOf(thisElems[elem]) == -1) elems.push(thisElems[elem]);
}
}
return elems;
};
this.addSubCommand = function(cmd) { this.stack.push(cmd); };
this.isEmpty = function() { return this.stack.length == 0; };
}
// private members
// **************************************************************************************
function Selector(id, elem) {
// this is the selector's unique number
this.id = id;
// this holds a reference to the element for which this selector is being used
this.selectedElement = elem;
// this is a flag used internally to track whether the selector is being used or not
this.locked = true;
// this function is used to reset the id and element that the selector is attached to
this.reset = function(e, update) {
this.locked = true;
this.selectedElement = e;
this.resize();
this.selectorGroup.setAttribute("display", "inline");
};
// this holds a reference to the element that holds all visual elements of the selector
this.selectorGroup = addSvgElementFromJson({ "element": "g",
"attr": {"id": ("selectorGroup"+this.id)}
});
// this holds a reference to the path rect
this.selectorRect = this.selectorGroup.appendChild( addSvgElementFromJson({
"element": "path",
"attr": {
"id": ("selectedBox"+this.id),
"fill": "none",
"stroke": "#22C",
"stroke-width": "1",
"stroke-dasharray": "5,5",
// need to specify this so that the rect is not selectable
"style": "pointer-events:none"
}
}) );
// this holds a reference to the grip elements for this selector
this.selectorGrips = { "nw":null,
"n":null,
"ne":null,
"e":null,
"se":null,
"s":null,
"sw":null,
"w":null
};
this.rotateGripConnector = this.selectorGroup.appendChild( addSvgElementFromJson({
"element": "line",
"attr": {
"id": ("selectorGrip_rotateconnector_" + this.id),
"stroke": "#22C",
"stroke-width": "1"
}
}) );
this.rotateGrip = this.selectorGroup.appendChild( addSvgElementFromJson({
"element": "circle",
"attr": {
"id": ("selectorGrip_rotate_" + this.id),
"fill": "lime",
"r": 4,
"stroke": "#22C",
"stroke-width": 2,
"style": "cursor:url(images/rotate.png) 12 12, auto;"
}
}) );
// add the corner grips
for (var dir in this.selectorGrips) {
this.selectorGrips[dir] = this.selectorGroup.appendChild(
addSvgElementFromJson({
"element": "circle",
"attr": {
"id": ("selectorGrip_resize_" + dir + "_" + this.id),
"fill": "#22C",
"r": 4,
"style": ("cursor:" + dir + "-resize"),
// This expands the mouse-able area of the grips making them
// easier to grab with the mouse.
// This works in Opera and WebKit, but does not work in Firefox
// see https://bugzilla.mozilla.org/show_bug.cgi?id=500174
"stroke-width": 2,
"pointer-events":"all",
"display":"none"
}
}) );
}
this.showGrips = function(show) {
// TODO: use suspendRedraw() here
var bShow = show ? "inline" : "none";
this.rotateGrip.setAttribute("display", bShow);
this.rotateGripConnector.setAttribute("display", bShow);
var elem = this.selectedElement;
for (var dir in this.selectorGrips) {
this.selectorGrips[dir].setAttribute("display", bShow);
}
if(elem) this.updateGripCursors(canvas.getRotationAngle(elem));
};
// Updates cursors for corner grips on rotation so arrows point the right way
this.updateGripCursors = function(angle) {
var dir_arr = [];
var steps = Math.round(angle / 45);
if(steps < 0) steps += 8;
for (var dir in this.selectorGrips) {
dir_arr.push(dir);
}
while(steps > 0) {
dir_arr.push(dir_arr.shift());
steps--;
}
var i = 0;
for (var dir in this.selectorGrips) {
this.selectorGrips[dir].setAttribute('style', ("cursor:" + dir_arr[i] + "-resize"));
i++;
};
};
this.resize = function() {
var selectedBox = this.selectorRect,
selectedGrips = this.selectorGrips,
selected = this.selectedElement,
sw = round(selected.getAttribute("stroke-width"));
var offset = 1/canvas.getZoom();
if (selected.getAttribute("stroke") != "none" && !isNaN(sw)) {
offset += sw/2;
}
if (selected.tagName == "text") {
offset += 2/canvas.getZoom();
}
var bbox = canvas.getBBox(selected);
if(selected.tagName == 'g') {
// The bbox for a group does not include stroke vals, so we
// get the bbox based on its children.
var stroked_bbox = canvas.getStrokedBBox(selected.childNodes);
$.each(bbox, function(key, val) {
bbox[key] = stroked_bbox[key];
});
}
// loop and transform our bounding box until we reach our first rotation
var tlist = canvas.getTransformList(selected),
m = transformListToTransform(tlist).matrix;
// This should probably be handled somewhere else, but for now
// it keeps the selection box correctly positioned when zoomed
m.e *= current_zoom;
m.f *= current_zoom;
// apply the transforms
var l=bbox.x-offset, t=bbox.y-offset, w=bbox.width+(offset<<1), h=bbox.height+(offset<<1),
bbox = {x:l, y:t, width:w, height:h};
// we need to handle temporary transforms too
// if skewed, get its transformed box, then find its axis-aligned bbox
//*
var nbox = transformBox(l*current_zoom, t*current_zoom, w*current_zoom, h*current_zoom, m),
nbax = nbox.aabox.x,
nbay = nbox.aabox.y,
nbaw = nbox.aabox.width,
nbah = nbox.aabox.height;
// now if the shape is rotated, un-rotate it
var cx = nbax + nbaw/2,
cy = nbay + nbah/2;
var angle = canvas.getRotationAngle(selected);
if (angle) {
var rot = svgroot.createSVGTransform();
rot.setRotate(-angle,cx,cy);
var rotm = rot.matrix;
nbox.tl = transformPoint(nbox.tl.x,nbox.tl.y,rotm);
nbox.tr = transformPoint(nbox.tr.x,nbox.tr.y,rotm);
nbox.bl = transformPoint(nbox.bl.x,nbox.bl.y,rotm);
nbox.br = transformPoint(nbox.br.x,nbox.br.y,rotm);
// calculate the axis-aligned bbox
var minx = nbox.tl.x,
miny = nbox.tl.y,
maxx = nbox.tl.x,
maxy = nbox.tl.y;
minx = Math.min(minx, Math.min(nbox.tr.x, Math.min(nbox.bl.x, nbox.br.x) ) );
miny = Math.min(miny, Math.min(nbox.tr.y, Math.min(nbox.bl.y, nbox.br.y) ) );
maxx = Math.max(maxx, Math.max(nbox.tr.x, Math.max(nbox.bl.x, nbox.br.x) ) );
maxy = Math.max(maxy, Math.max(nbox.tr.y, Math.max(nbox.bl.y, nbox.br.y) ) );
nbax = minx;
nbay = miny;
nbaw = (maxx-minx);
nbah = (maxy-miny);
}
var sr_handle = svgroot.suspendRedraw(100);
var dstr = "M" + nbax + "," + nbay
+ " L" + (nbax+nbaw) + "," + nbay
+ " " + (nbax+nbaw) + "," + (nbay+nbah)
+ " " + nbax + "," + (nbay+nbah) + "z";
assignAttributes(selectedBox, {'d': dstr});
var gripCoords = {
nw: [nbax, nbay],
ne: [nbax+nbaw, nbay],
sw: [nbax, nbay+nbah],
se: [nbax+nbaw, nbay+nbah],
n: [nbax + (nbaw)/2, nbay],
w: [nbax, nbay + (nbah)/2],
e: [nbax + nbaw, nbay + (nbah)/2],
s: [nbax + (nbaw)/2, nbay + nbah]
};
if(selected == selectedElements[0]) {
for(var dir in gripCoords) {
var coords = gripCoords[dir];
assignAttributes(selectedGrips[dir], {
cx: coords[0], cy: coords[1]
});
};
}
if (angle) {
this.selectorGroup.setAttribute("transform", "rotate(" + [angle,cx,cy].join(",") + ")");
}
else {
this.selectorGroup.setAttribute("transform", "");
}
// we want to go 20 pixels in the negative transformed y direction, ignoring scale
assignAttributes(this.rotateGripConnector, { x1: nbax + (nbaw)/2,
y1: nbay,
x2: nbax + (nbaw)/2,
y2: nbay- 20});
assignAttributes(this.rotateGrip, { cx: nbax + (nbaw)/2,
cy: nbay - 20 });
svgroot.unsuspendRedraw(sr_handle);
};
// now initialize the selector
this.reset(elem);
};
function SelectorManager() {
// this will hold the element that contains all selector rects/grips
this.selectorParentGroup = null;
// this is a special rect that is used for multi-select
this.rubberBandBox = null;
// this will hold objects of type Selector (see above)
this.selectors = [];
// this holds a map of SVG elements to their Selector object
this.selectorMap = {};
// local reference to this object
var mgr = this;
this.initGroup = function() {
// remove old selector parent group if it existed
if (mgr.selectorParentGroup && mgr.selectorParentGroup.parentNode) {
mgr.selectorParentGroup.parentNode.removeChild(mgr.selectorParentGroup);
}
// create parent selector group and add it to svgroot
mgr.selectorParentGroup = svgdoc.createElementNS(svgns, "g");
mgr.selectorParentGroup.setAttribute("id", "selectorParentGroup");
svgroot.appendChild(mgr.selectorParentGroup);
mgr.selectorMap = {};
mgr.selectors = [];
mgr.rubberBandBox = null;
if($("#canvasBackground").length) return;
var canvasbg = svgdoc.createElementNS(svgns, "svg");
assignAttributes(canvasbg, {
'id':'canvasBackground',
'width': 640,
'height': 480,
'x': 0,
'y': 0,
'overflow': 'visible',
'style': 'pointer-events:none'
});
var rect = svgdoc.createElementNS(svgns, "rect");
assignAttributes(rect, {
'width': '100%',
'height': '100%',
'x': 0,
'y': 0,
'stroke-width': 1,
'stroke': '#000',
'fill': '#FFF',
'style': 'pointer-events:none'
});
// Both Firefox and WebKit are too slow with this filter region (especially at higher
// zoom levels) and Opera has at least one bug
// if (!window.opera) rect.setAttribute('filter', 'url(#canvashadow)');
canvasbg.appendChild(rect);
svgroot.insertBefore(canvasbg, svgcontent);
};
this.requestSelector = function(elem) {
if (elem == null) return null;
var N = this.selectors.length;
// if we've already acquired one for this element, return it
if (typeof(this.selectorMap[elem.id]) == "object") {
this.selectorMap[elem.id].locked = true;
return this.selectorMap[elem.id];
}
for (var i = 0; i < N; ++i) {
if (this.selectors[i] && !this.selectors[i].locked) {
this.selectors[i].locked = true;
this.selectors[i].reset(elem);
this.selectorMap[elem.id] = this.selectors[i];
return this.selectors[i];
}
}
// if we reached here, no available selectors were found, we create one
this.selectors[N] = new Selector(N, elem);
this.selectorParentGroup.appendChild(this.selectors[N].selectorGroup);
this.selectorMap[elem.id] = this.selectors[N];
return this.selectors[N];
};
this.releaseSelector = function(elem) {
if (elem == null) return;
var N = this.selectors.length,
sel = this.selectorMap[elem.id];
for (var i = 0; i < N; ++i) {
if (this.selectors[i] && this.selectors[i] == sel) {
if (sel.locked == false) {
console.log("WARNING! selector was released but was already unlocked");
}
delete this.selectorMap[elem.id];
sel.locked = false;
sel.selectedElement = null;
sel.showGrips(false);
// remove from DOM and store reference in JS but only if it exists in the DOM
try {
sel.selectorGroup.setAttribute("display", "none");
} catch(e) { }
break;
}
}
};
this.getRubberBandBox = function() {
if (this.rubberBandBox == null) {
this.rubberBandBox = this.selectorParentGroup.appendChild(
addSvgElementFromJson({ "element": "rect",
"attr": {
"id": "selectorRubberBand",
"fill": "#22C",
"fill-opacity": 0.15,
"stroke": "#22C",
"stroke-width": 0.5,
"display": "none",
"style": "pointer-events:none"
}
}));
}
return this.rubberBandBox;
};
this.initGroup();
}
// **************************************************************************************
// **************************************************************************************
// SVGTransformList implementation for Webkit
// These methods do not currently raise any exceptions.
// These methods also do not check that transforms are being inserted or handle if
// a transform is already in the list, etc. This is basically implementing as much
// of SVGTransformList that we need to get the job done.
//
// interface SVGEditTransformList {
// attribute unsigned long numberOfItems;
// void clear ( )
// SVGTransform initialize ( in SVGTransform newItem )
// SVGTransform getItem ( in unsigned long index )
// SVGTransform insertItemBefore ( in SVGTransform newItem, in unsigned long index )
// SVGTransform replaceItem ( in SVGTransform newItem, in unsigned long index )
// SVGTransform removeItem ( in unsigned long index )
// SVGTransform appendItem ( in SVGTransform newItem )
// NOT IMPLEMENTED: SVGTransform createSVGTransformFromMatrix ( in SVGMatrix matrix );
// NOT IMPLEMENTED: SVGTransform consolidate ( );
// }
// **************************************************************************************
var svgTransformLists = {};
var SVGEditTransformList = function(elem) {
this._elem = elem || null;
this._xforms = [];
// TODO: how do we capture the undo-ability in the changed transform list?
this._update = function() {
var tstr = "";
var concatMatrix = svgroot.createSVGMatrix();
for (var i = 0; i < this.numberOfItems; ++i) {
var xform = this._list.getItem(i);
tstr += transformToObj(xform).text + " ";
}
this._elem.setAttribute("transform", tstr);
};
this._list = this;
this._init = function() {
// Transform attribute parser
var str = this._elem.getAttribute("transform");
if(!str) return;
// TODO: Add skew support in future
var re = /\s*((scale|matrix|rotate|translate)\s*\(.*?\))\s*,?\s*/;
var arr = [];
var m = true;
while(m) {
m = str.match(re);
str = str.replace(re,'');
if(m && m[1]) {
var x = m[1];
var bits = x.split(/\s*\(/);
var name = bits[0];
var val_bits = bits[1].match(/\s*(.*?)\s*\)/);
var val_arr = val_bits[1].split(/[, ]+/);
var letters = 'abcdef'.split('');
var mtx = svgroot.createSVGMatrix();
$.each(val_arr, function(i, item) {
val_arr[i] = parseFloat(item);
if(name == 'matrix') {
mtx[letters[i]] = val_arr[i];
}
});
var xform = svgroot.createSVGTransform();
var fname = 'set' + name.charAt(0).toUpperCase() + name.slice(1);
var values = name=='matrix'?[mtx]:val_arr;
xform[fname].apply(xform, values);
this._list.appendItem(xform);
}
}
}
this.numberOfItems = 0;
this.clear = function() {
this.numberOfItems = 0;
this._xforms = [];
};
this.initialize = function(newItem) {
this.numberOfItems = 1;
this._xforms = [newItem];
};
this.getItem = function(index) {
if (index < this.numberOfItems && index >= 0) {
return this._xforms[index];
}
return null;
};
this.insertItemBefore = function(newItem, index) {
var retValue = null;
if (index >= 0) {
if (index < this.numberOfItems) {
var newxforms = new Array(this.numberOfItems + 1);
// TODO: use array copying and slicing
for ( var i = 0; i < index; ++i) {
newxforms[i] = this._xforms[i];
}
newxforms[i] = newItem;
for ( var j = i+1; i < this.numberOfItems; ++j, ++i) {
newxforms[j] = this._xforms[i];
}
this.numberOfItems++;
this._xforms = newxforms;
retValue = newItem;
this._list._update();
}
else {
retValue = this._list.appendItem(newItem);
}
}
return retValue;
};
this.replaceItem = function(newItem, index) {
var retValue = null;
if (index < this.numberOfItems && index >= 0) {
this._xforms[index] = newItem;
retValue = newItem;
this._list._update();
}
return retValue;
};
this.removeItem = function(index) {
var retValue = null;
if (index < this.numberOfItems && index >= 0) {
var retValue = this._xforms[index];
var newxforms = new Array(this.numberOfItems - 1);
for (var i = 0; i < index; ++i) {
newxforms[i] = this._xforms[i];
}
for (var j = i; j < this.numberOfItems-1; ++j, ++i) {
newxforms[j] = this._xforms[i+1];
}
this.numberOfItems--;
this._xforms = newxforms;
this._list._update();
}
return retValue;
};
this.appendItem = function(newItem) {
this._xforms.push(newItem);
this.numberOfItems++;
this._list._update();
return newItem;
};
};
// **************************************************************************************
var addSvgElementFromJson = function(data) {
return canvas.updateElementFromJson(data)
};
// TODO: declare the variables and set them as null, then move this setup stuff to
// an initialization function - probably just use clear()
var canvas = this,
svgns = "http://www.w3.org/2000/svg",
xlinkns = "http://www.w3.org/1999/xlink",
xmlns = "http://www.w3.org/XML/1998/namespace",
xmlnsns = "http://www.w3.org/2000/xmlns/", // see http://www.w3.org/TR/REC-xml-names/#xmlReserved
se_ns = "http://svg-edit.googlecode.com",
htmlns = "http://www.w3.org/1999/xhtml",
mathns = "http://www.w3.org/1998/Math/MathML",
idprefix = "svg_",
svgdoc = container.ownerDocument,
svgroot = svgdoc.importNode(Utils.text2xml('').documentElement, true);
$(svgroot).appendTo(container);
var opac_ani = document.createElementNS(svgns, 'animate');
$(opac_ani).attr({
attributeName: 'opacity',
begin: 'indefinite',
dur: 1,
fill: 'freeze'
}).appendTo(svgroot);
//nonce to uniquify id's
var nonce = Math.floor(Math.random()*100001);
var randomize_ids = false;
// map namespace URIs to prefixes
var nsMap = {};
nsMap[xlinkns] = 'xlink';
nsMap[xmlns] = 'xml';
nsMap[xmlnsns] = 'xmlns';
nsMap[se_ns] = 'se';
nsMap[htmlns] = 'xhtml';
nsMap[mathns] = 'mathml';
// map prefixes to namespace URIs
var nsRevMap = {};
$.each(nsMap, function(key,value){
nsRevMap[value] = key;
});
// Produce a Namespace-aware version of svgWhitelist
var svgWhiteListNS = {};
$.each(svgWhiteList, function(elt,atts){
attNS = {};
$.each(atts, function(i, att){
if (att.indexOf(':') != -1) {
v=att.split(':');
attNS[v[1]] = nsRevMap[v[0]];
} else {
attNS[att] = att == 'xmlns' ? xmlnsns : null;
}
});
svgWhiteListNS[elt] = attNS;
});
var svgcontent = svgdoc.createElementNS(svgns, "svg");
$(svgcontent).attr({
id: 'svgcontent',
width: 640,
height: 480,
x: 640,
y: 480,
overflow: 'visible',
xmlns: svgns,
"xmlns:se": se_ns,
"xmlns:xlink": xlinkns
}).appendTo(svgroot);
if (randomize_ids) svgcontent.setAttributeNS(se_ns, 'se:nonce', nonce);
var convertToNum, convertToUnit, setUnitAttr;
(function() {
var w_attrs = ['x', 'x1', 'cx', 'rx', 'width'];
var h_attrs = ['y', 'y1', 'cy', 'ry', 'height'];
var unit_attrs = $.merge(['r','radius'], w_attrs);
$.merge(unit_attrs, h_attrs);
// Converts given values to numbers. Attributes must be supplied in
// case a percentage is given
convertToNum = function(attr, val) {
// Return a number if that's what it already is
if(!isNaN(val)) return val-0;
if(val.substr(-1) === '%') {
// Deal with percentage, depends on attribute
var num = val.substr(0, val.length-1)/100;
var res = canvas.getResolution();
if($.inArray(attr, w_attrs) !== -1) {
return num * res.w;
} else if($.inArray(attr, h_attrs) !== -1) {
return num * res.h;
} else {
return num * Math.sqrt((res.w*res.w) + (res.h*res.h))/Math.sqrt(2);
}
} else {
var unit = val.substr(-2);
var num = val.substr(0, val.length-2);
// Note that this multiplication turns the string into a number
return num * unit_types[unit];
}
};
setUnitAttr = function(elem, attr, val) {
if(!isNaN(val)) {
// New value is a number, so check currently used unit
var old_val = elem.getAttribute(attr);
if(old_val !== null && isNaN(old_val)) {
// Old value was a number, so get unit, then convert
var unit;
if(old_val.substr(-1) === '%') {
var res = canvas.getResolution();
unit = '%';
val *= 100;
if($.inArray(attr, w_attrs) !== -1) {
val = val / res.w;
} else if($.inArray(attr, h_attrs) !== -1) {
val = val / res.h;
} else {
return val / Math.sqrt((res.w*res.w) + (res.h*res.h))/Math.sqrt(2);
}
} else {
unit = old_val.substr(-2);
val = val / unit_types[unit];
}
val += unit;
}
}
elem.setAttribute(attr, val);
}
canvas.isValidUnit = function(attr, val) {
var valid = false;
if($.inArray(attr, unit_attrs) != -1) {
// True if it's just a number
if(!isNaN(val)) {
valid = true;
} else {
// Not a number, check if it has a valid unit
val = val.toLowerCase();
$.each(unit_types, function(unit) {
if(valid) return;
var re = new RegExp('^-?[\\d\\.]+' + unit + '$');
if(re.test(val)) valid = true;
});
}
} else if (attr == "id") {
// if we're trying to change the id, make sure it's not already present in the doc
// and the id value is valid.
var result = false;
// because getElem() can throw an exception in the case of an invalid id
// (according to http://www.w3.org/TR/xml-id/ IDs must be a NCName)
// we wrap it in an exception and only return true if the ID was valid and
// not already present
try {
var elem = getElem(val);
result = (elem == null);
} catch(e) {}
return result;
} else valid = true;
return valid;
}
})();
var assignAttributes = function(node, attrs, suspendLength, unitCheck) {
if(!suspendLength) suspendLength = 0;
// Opera has a problem with suspendRedraw() apparently
var handle = null;
if (!window.opera) svgroot.suspendRedraw(suspendLength);
for (var i in attrs) {
var ns = (i.substr(0,4) == "xml:" ? xmlns :
i.substr(0,6) == "xlink:" ? xlinkns : null);
if(ns || !unitCheck) {
node.setAttributeNS(ns, i, attrs[i]);
} else {
setUnitAttr(node, i, attrs[i]);
}
}
if (!window.opera) svgroot.unsuspendRedraw(handle);
};
// remove unneeded attributes
// makes resulting SVG smaller
var cleanupElement = function(element) {
var handle = svgroot.suspendRedraw(60);
var defaults = {
'fill-opacity':1,
'opacity':1,
'stroke':'none',
'stroke-dasharray':'none',
'stroke-opacity':1,
'stroke-width':1,
'rx':0,
'ry':0
}
for(var attr in defaults) {
var val = defaults[attr];
if(element.getAttribute(attr) == val) {
element.removeAttribute(attr);
}
}
svgroot.unsuspendRedraw(handle);
};
this.updateElementFromJson = function(data) {
var shape = getElem(data.attr.id);
// if shape is a path but we need to create a rect/ellipse, then remove the path
if (shape && data.element != shape.tagName) {
current_layer.removeChild(shape);
shape = null;
}
if (!shape) {
shape = svgdoc.createElementNS(svgns, data.element);
if (current_layer) {
current_layer.appendChild(shape);
}
}
assignAttributes(shape, data.attr, 100);
cleanupElement(shape);
return shape;
};
(function() {
// TODO: make this string optional and set by the client
var comment = svgdoc.createComment(" Created with SVG-edit - http://svg-edit.googlecode.com/ ");
svgcontent.appendChild(comment);
// TODO For Issue 208: this is a start on a thumbnail
// var svgthumb = svgdoc.createElementNS(svgns, "use");
// svgthumb.setAttribute('width', '100');
// svgthumb.setAttribute('height', '100');
// svgthumb.setAttributeNS(xlinkns, 'href', '#svgcontent');
// svgroot.appendChild(svgthumb);
})();
// z-ordered array of tuples containing layer names and elements
// the first layer is the one at the bottom of the rendering
var all_layers = [],
encodableImages = {},
last_good_img_url = 'images/logo.png',
// pointer to the current layer
current_layer = null,
save_options = {round_digits: 5},
started = false,
obj_num = 1,
start_transform = null,
current_mode = "select",
current_resize_mode = "none",
all_properties = {
shape: {
fill: "#FF0000",
fill_paint: null,
fill_opacity: 1,
stroke: "#000000",
stroke_paint: null,
stroke_opacity: 1,
stroke_width: 2,
stroke_style: 'none',
opacity: 1
}
};
all_properties.text = $.extend(true, {}, all_properties.shape);
$.extend(all_properties.text, {
fill: "#000000",
stroke_width: 0,
font_size: 24,
font_family: 'serif'
});
var cur_shape = all_properties.shape,
cur_text = all_properties.text,
cur_properties = cur_shape,
current_zoom = 1,
// this will hold all the currently selected elements
// default size of 1 until it needs to grow bigger
selectedElements = new Array(1),
// this holds the selected's bbox
selectedBBoxes = new Array(1),
justSelected = null,
// this object manages selectors for us
selectorManager = new SelectorManager(),
rubberBox = null,
events = {},
undoStackPointer = 0,
undoStack = [],
curBBoxes = [],
extensions = {};
// Should this return an array by default, so extension results aren't overwritten?
var runExtensions = this.runExtensions = function(action, vars, returnArray) {
var result = false;
if(returnArray) result = [];
$.each(extensions, function(name, opts) {
if(action in opts) {
if(returnArray) {
result.push(opts[action](vars))
} else {
result = opts[action](vars);
}
}
});
return result;
}
// This method rounds the incoming value to the nearest value based on the current_zoom
var round = function(val){
return parseInt(val*current_zoom)/current_zoom;
};
// This method sends back an array or a NodeList full of elements that
// intersect the multi-select rubber-band-box on the current_layer only.
//
// Since the only browser that supports the SVG DOM getIntersectionList is Opera,
// we need to provide an implementation here. We brute-force it for now.
//
// Reference:
// Firefox does not implement getIntersectionList(), see https://bugzilla.mozilla.org/show_bug.cgi?id=501421
// Webkit does not implement getIntersectionList(), see https://bugs.webkit.org/show_bug.cgi?id=11274
var getIntersectionList = function(rect) {
if (rubberBox == null) { return null; }
if(!curBBoxes.length) {
// Cache all bboxes
curBBoxes = canvas.getVisibleElements(current_layer, true);
}
var resultList = null;
try {
resultList = current_layer.getIntersectionList(rect, null);
} catch(e) { }
if (resultList == null || typeof(resultList.item) != "function") {
resultList = [];
var rubberBBox = rubberBox.getBBox();
$.each(rubberBBox, function(key, val) {
rubberBBox[key] = val / current_zoom;
});
var i = curBBoxes.length;
while (i--) {
if(!rubberBBox.width || !rubberBBox.width) continue;
if (Utils.rectsIntersect(rubberBBox, curBBoxes[i].bbox)) {
resultList.push(curBBoxes[i].elem);
}
}
}
// addToSelection expects an array, but it's ok to pass a NodeList
// because using square-bracket notation is allowed:
// http://www.w3.org/TR/DOM-Level-2-Core/ecma-script-binding.html
return resultList;
};
// FIXME: we MUST compress consecutive text changes to the same element
// (right now each keystroke is saved as a separate command that includes the
// entire text contents of the text element)
// TODO: consider limiting the history that we store here (need to do some slicing)
var addCommandToHistory = function(cmd) {
// if our stack pointer is not at the end, then we have to remove
// all commands after the pointer and insert the new command
if (undoStackPointer < undoStack.length && undoStack.length > 0) {
undoStack = undoStack.splice(0, undoStackPointer);
}
undoStack.push(cmd);
undoStackPointer = undoStack.length;
};
// private functions
var getId = function() {
if (events["getid"]) return call("getid", obj_num);
if (randomize_ids) {
return idprefix + nonce +'_' + obj_num;
} else {
return idprefix + obj_num;
}
};
var getNextId = function() {
// ensure the ID does not exist
var id = getId();
while (getElem(id)) {
obj_num++;
id = getId();
}
return id;
};
var call = function(event, arg) {
if (events[event]) {
return events[event](this,arg);
}
};
// this function sanitizes the input node and its children
// this function only keeps what is allowed from our whitelist defined above
var sanitizeSvg = function(node) {
// we only care about element nodes
// automatically return for all comment, etc nodes
// for text, we do a whitespace trim
if (node.nodeType == 3) {
node.nodeValue = node.nodeValue.replace(/^\s+|\s+$/g, "");
// Remove empty text nodes
if(!node.nodeValue.length) node.parentNode.removeChild(node);
}
if (node.nodeType != 1) return;
var doc = node.ownerDocument;
var parent = node.parentNode;
// can parent ever be null here? I think the root node's parent is the document...
if (!doc || !parent) return;
var allowedAttrs = svgWhiteList[node.nodeName];
var allowedAttrsNS = svgWhiteListNS[node.nodeName];
// if this element is allowed
if (allowedAttrs != undefined) {
var se_attrs = [];
var i = node.attributes.length;
while (i--) {
// if the attribute is not in our whitelist, then remove it
// could use jQuery's inArray(), but I don't know if that's any better
var attr = node.attributes.item(i);
var attrName = attr.nodeName;
var attrLocalName = attr.localName;
var attrNsURI = attr.namespaceURI;
// Check that an attribute with the correct localName in the correct namespace is on
// our whitelist or is a namespace declaration for one of our allowed namespaces
if (!(allowedAttrsNS.hasOwnProperty(attrLocalName) && attrNsURI == allowedAttrsNS[attrLocalName] && attrNsURI != xmlnsns) &&
!(attrNsURI == xmlnsns && nsMap[attr.nodeValue]) )
{
// Bypassing the whitelist to allow se: prefixes. Is there
// a more appropriate way to do this?
if(attrName.indexOf('se:') == 0) {
se_attrs.push([attrName, attr.nodeValue]);
}
node.removeAttributeNS(attrNsURI, attrLocalName);
}
// special handling for path d attribute
if (node.nodeName == 'path' && attrName == 'd') {
// Convert to absolute
node.setAttribute('d',pathActions.convertPath(node));
pathActions.fixEnd(node);
}
// for the style attribute, rewrite it in terms of XML presentational attributes
if (attrName == "style") {
var props = attr.nodeValue.split(";"),
p = props.length;
while(p--) {
var nv = props[p].split(":");
// now check that this attribute is supported
if (allowedAttrs.indexOf(nv[0]) != -1) {
node.setAttribute(nv[0],nv[1]);
}
}
}
}
$.each(se_attrs, function(i, attr) {
node.setAttributeNS(se_ns, attr[0], attr[1]);
});
// for some elements that have a xlink:href, ensure the URI refers to a local element
// (but not for links)
var href = node.getAttributeNS(xlinkns,"href");
if(href &&
$.inArray(node.nodeName, ["filter", "linearGradient", "pattern",
"radialGradient", "textPath", "use"]) != -1)
{
// TODO: we simply check if the first character is a #, is this bullet-proof?
if (href[0] != "#") {
// remove the attribute (but keep the element)
node.setAttributeNS(xlinkns, "xlink:href", "");
node.removeAttributeNS(xlinkns, "href");
}
}
// Safari crashes on a