svgedit/editor/svgcanvas.js

2476 lines
78 KiB
JavaScript

if(!window.console) {
window.console = new function() {
this.log = function(str) {};
this.dir = function(str) {};
};
}
// this defines which elements and attributes that we support
// TODO: add <g> elements to this
// TODO: add <polygon> elements to this
// TODO: add <a> elements to this
// TODO: add xmlns:xlink attr to <svg> element
var svgWhiteList = {
"circle": ["cx", "cy", "fill", "fill-opacity", "id", "r", "stroke", "stroke-dasharray", "stroke-opacity", "stroke-width", "transform"],
"defs": [],
"ellipse": ["cx", "cy", "fill", "fill-opacity", "id", "rx", "ry", "stroke", "stroke-dasharray", "stroke-opacity", "stroke-width", "transform"],
"line": ["fill", "fill-opacity", "id", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-opacity", "stroke-width", "transform", "x1", "x2", "y1", "y2"],
"linearGradient": ["id", "gradientTransform", "gradientUnits", "spreadMethod", "x1", "x2", "y1", "y2"],
"path": ["d", "fill", "fill-opacity", "id", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-opacity", "stroke-width", "transform"],
"polygon": ["id", "fill", "fill-opacity", "points", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-opacity", "stroke-width", "transform"],
"polyline": ["id", "points", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-opacity", "stroke-width", "transform"],
"radialGradient": ["id", "cx", "cy", "fx", "fy", "gradientTransform", "gradientUnits", "r", "spreadMethod"],
"rect": ["fill", "fill-opacity", "height", "id", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-opacity", "stroke-width", "transform", "width", "x", "y"],
"stop": ["id", "offset", "stop-color", "stop-opacity"],
"svg": ["id", "height", "transform", "width", "xmlns"],
"text": ["fill", "fill-opacity", "font-family", "font-size", "font-style", "font-weight", "id", "stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-opacity", "stroke-width", "transform", "x", "y"],
};
// 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 (attr in attrs) {
if (attr == "#text") this.newValues[attr] = elem.textContent;
else this.newValues[attr] = elem.getAttribute(attr);
}
this.apply = function() {
for( 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.removeAttribute(attr);
}
}
return true;
};
this.unapply = function() {
for( 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);
}
}
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); };
this.unapply = function() {
this.parent = this.elem.parentNode;
this.elem = this.elem.parentNode.removeChild(this.elem);
};
this.elements = function() { return [this.elem]; };
}
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);
};
this.unapply = function() { this.elem = this.parent.insertBefore(this.elem, this.elem.nextSibling); };
this.elements = function() { return [this.elem]; };
}
function MoveElementCommand(elem, oldNextSibling, oldParent, text) {
this.elem = elem;
this.text = text ? ("Move " + elem.tagName + " to " + text) : ("Move " + elem.tagName + "top/bottom");
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);
};
this.unapply = function() {
this.elem = this.oldParent.insertBefore(this.elem, this.oldNextSibling);
};
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; };
}
function SvgCanvas(c)
{
// private members
// **************************************************************************************
// FIXME: what's the right way to make this 'class' private to the SelectorManager?
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) {
this.locked = true;
this.selectedElement = e;
this.resize();
selectorManager.update();
this.selectorGroup.setAttribute("display", "inline");
};
// this holds a reference to the <g> element that holds all visual elements of the selector
this.selectorGroup = addSvgElementFromJson({ "element": "g",
"attr": {"id": ("selectorGroup"+this.id)}
});
// this holds a reference to <rect> element
this.selectorRect = this.selectorGroup.appendChild( addSvgElementFromJson({
"element": "rect",
"attr": {
"id": ("selectedBox"+this.id),
"fill": "none",
"stroke": "blue",
"stroke-width": "1",
"stroke-dasharray": "5,5",
"width": 1,
"height": 1,
// 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,
"w":null,
"e":null,
"sw":null,
"s":null,
"se":null
};
// add the corner grips
for (dir in this.selectorGrips) {
this.selectorGrips[dir] = this.selectorGroup.appendChild(
addSvgElementFromJson({
"element": "rect",
"attr": {
"id": ("selectorGrip_" + dir + "_" + this.id),
"fill": "blue",
"width": 6,
"height": 6,
"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.selectorGrips[dir].id).mousedown( function() {
current_mode = "resize";
current_resize_mode = this.id.substr(13,this.id.indexOf("_",13)-13);
});
}
this.showGrips = function(show) {
// TODO: use suspendRedraw() here
for (dir in this.selectorGrips) {
this.selectorGrips[dir].setAttribute("display", show ? "inline" : "none");
}
};
this.resize = function(bbox) {
var selectedBox = this.selectorRect;
var selectedGrips = this.selectorGrips;
var selected = this.selectedElement;
var sw = parseInt(selected.getAttribute("stroke-width"));
var offset = 1;
if (!isNaN(sw)) {
offset += sw/2;
}
if (selected.tagName == "text") {
offset += 2;
}
var bbox = bbox || canvas.getBBox(this.selectedElement);
var l=bbox.x-offset, t=bbox.y-offset, w=bbox.width+(offset<<1), h=bbox.height+(offset<<1);
// TODO: use suspendRedraw() here
selectedBox.setAttribute("x", l);
selectedBox.setAttribute("y", t);
selectedBox.setAttribute("width", w);
selectedBox.setAttribute("height", h);
selectedGrips.nw.setAttribute("x", l-3);
selectedGrips.nw.setAttribute("y", t-3);
selectedGrips.ne.setAttribute("x", l+w-3);
selectedGrips.ne.setAttribute("y", t-3);
selectedGrips.sw.setAttribute("x", l-3);
selectedGrips.sw.setAttribute("y", t+h-3);
selectedGrips.se.setAttribute("x", l+w-3);
selectedGrips.se.setAttribute("y", t+h-3);
selectedGrips.n.setAttribute("x", l+w/2-3);
selectedGrips.n.setAttribute("y", t-3);
selectedGrips.w.setAttribute("x", l-3);
selectedGrips.w.setAttribute("y", t+h/2-3);
selectedGrips.e.setAttribute("x", l+w-3);
selectedGrips.e.setAttribute("y", t+h/2-3);
selectedGrips.s.setAttribute("x", l+w/2-3);
selectedGrips.s.setAttribute("y", t+h-3);
};
// now initialize the selector
this.reset(elem);
};
function SelectorManager() {
// this will hold the <g> 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;
// private function
var initGroup = function() {
mgr.selectorParentGroup = addSvgElementFromJson({
"element": "g",
"attr": {"id": "selectorParentGroup"}
});
};
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;
var 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 keeps the selector groups as the last child in the document
this.update = function() {
this.selectorParentGroup = svgroot.appendChild(this.selectorParentGroup);
};
this.getRubberBandBox = function() {
if (this.rubberBandBox == null) {
this.rubberBandBox = this.selectorParentGroup.appendChild(
addSvgElementFromJson({ "element": "rect",
"attr": {
"id": "selectorRubberBand",
"fill": "blue",
"fill-opacity": 0.15,
"stroke": "blue",
"stroke-width": 0.5,
"display": "none",
"style": "pointer-events:none"
}
}));
}
return this.rubberBandBox;
};
initGroup();
}
// **************************************************************************************
var addSvgElementFromJson = function(data) {
return canvas.updateElementFromJson(data)
};
var assignAttributes = function(node, attrs) {
var handle = svgroot.suspendRedraw(60);
for (i in attrs) {
node.setAttributeNS(null, i, attrs[i]);
}
svgroot.unsuspendRedraw(handle);
};
// remove unneeded attributes
// makes resulting SVG smaller
var cleanupElement = function(element) {
var handle = svgroot.suspendRedraw(60);
if (element.getAttribute('fill-opacity') == '1')
element.removeAttribute('fill-opacity');
if (element.getAttribute('opacity') == '1')
element.removeAttribute('opacity');
if (element.getAttribute('stroke') == 'none')
element.removeAttribute('stroke');
if (element.getAttribute('stroke-dasharray') == 'none')
element.removeAttribute('stroke-dasharray');
if (element.getAttribute('stroke-opacity') == '1')
element.removeAttribute('stroke-opacity');
if (element.getAttribute('stroke-width') == '1')
element.removeAttribute('stroke-width');
if (element.getAttribute('rx') == '0')
element.removeAttribute('rx')
if (element.getAttribute('ry') == '0')
element.removeAttribute('ry')
svgroot.unsuspendRedraw(handle);
};
this.updateElementFromJson = function(data) {
var shape = svgdoc.getElementById(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) {
svgroot.removeChild(shape);
shape = null;
}
if (!shape) {
shape = svgdoc.createElementNS(svgns, data.element);
svgroot.appendChild(shape);
}
assignAttributes(shape, data.attr);
cleanupElement(shape);
return shape;
};
var canvas = this;
var container = c;
var svgns = "http://www.w3.org/2000/svg";
var idprefix = "svg_";
var svgdoc = c.ownerDocument;
var svgroot = svgdoc.createElementNS(svgns, "svg");
svgroot.setAttribute("width", 640);
svgroot.setAttribute("height", 480);
svgroot.setAttribute("id", "svgroot");
svgroot.setAttribute("xmlns", svgns);
container.appendChild(svgroot);
var d_attr = null;
var started = false;
var obj_num = 1;
var start_x = null;
var start_y = null;
var current_mode = "select";
var current_resize_mode = "none";
var current_fill = "#FF0000";
var current_stroke = "#000000";
var current_stroke_paint = null;
var current_fill_paint = null;
var current_stroke_width = 5;
var current_stroke_style = "none";
var current_opacity = 1;
var current_stroke_opacity = 1;
var current_fill_opacity = 1;
var current_font_size = "12pt";
var current_font_family = "serif";
var freehand_min_x = null;
var freehand_max_x = null;
var freehand_min_y = null;
var freehand_max_y = null;
var current_poly = null;
var current_poly_pts = [];
var current_poly_pt_drag = -1;
// this will hold all the currently selected elements
// default size of 1 until it needs to grow bigger
var selectedElements = new Array(1);
// this holds the selected's bbox
var selectedBBoxes = new Array(1);
// this object manages selectors for us
var selectorManager = new SelectorManager();
var rubberBox = null;
var events = {};
var undoStackPointer = 0;
var undoStack = [];
// This method sends back an array or a NodeList full of elements that
// intersect the multi-select rubber-band-box.
//
// 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; }
var resultList = null;
try {
resultList = svgroot.getIntersectionList(rect, null);
} catch(e) { }
if (resultList == null || typeof(resultList.item) != "function")
{
resultList = [];
var rubberBBox = rubberBox.getBBox();
var nodes = svgroot.childNodes;
var i = svgroot.childNodes.length;
while (i--) {
// need to do this since the defs has no bbox and causes an exception
// to be thrown in Mozilla
try {
if (nodes[i].id != "selectorParentGroup" &&
Utils.rectsIntersect(rubberBBox, canvas.getBBox(nodes[i])))
{
resultList.push(nodes[i]);
}
} catch(e) {
// do nothing, this element did not have a bbox
}
}
}
// 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);
return idprefix + obj_num;
};
var getNextId = function() {
// ensure the ID does not exist
var id = getId();
while (svgdoc.getElementById(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, "");
}
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];
// if this element is allowed
if (allowedAttrs != undefined) {
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 attrName = node.attributes.item(i).nodeName;
if (allowedAttrs.indexOf(attrName) == -1) {
// TODO: do I need to call setAttribute(..., "") here for Fx2?
node.removeAttribute(attrName);
}
}
// recurse to children
i = node.childNodes.length;
while (i--) { sanitizeSvg(node.childNodes.item(i)); }
}
// else, remove this element
else {
// remove all children from this node and insert them before this node
var children = [];
while (node.hasChildNodes()) {
children.push(parent.insertBefore(node.firstChild, node));
}
// remove this node from the document altogether
parent.removeChild(node);
// call sanitizeSvg on each of those children
var i = children.length;
while (i--) { sanitizeSvg(children[i]); }
}
};
var svgToString = function(elem, indent) {
var out = new Array();
if (elem) {
var attrs = elem.attributes;
var attr;
var i;
var childs = elem.childNodes;
for (i=0; i<indent; i++) out.push(" ");
out.push("<"); out.push(elem.nodeName);
for (i=attrs.length-1; i>=0; i--) {
attr = attrs.item(i);
if (attr.nodeValue != "") {
out.push(" "); out.push(attr.nodeName); out.push("=\"");
out.push(attr.nodeValue); out.push("\"");
}
}
if (elem.hasChildNodes()) {
out.push(">");
indent++;
var bOneLine = false;
for (i=0; i<childs.length; i++)
{
var child = childs.item(i);
if (child.id == "selectorParentGroup") continue;
switch(child.nodeType) {
case 1: // element node
out.push("\n");
out.push(svgToString(childs.item(i), indent));
break;
case 3: // text node
var str = child.nodeValue.replace(/^\s+|\s+$/g, "");
if (str != "") {
bOneLine = true;
out.push(str + "");
}
break;
case 8: // comment
out.push("\n");
out.push(new Array(indent+1).join(" "));
out.push("<!--");
out.push(child.data);
out.push("-->");
break;
} // switch on node type
}
indent--;
if (!bOneLine) {
out.push("\n");
for (i=0; i<indent; i++) out.push(" ");
}
out.push("</"); out.push(elem.nodeName); out.push(">");
} else {
out.push("/>");
}
}
return out.join('');
}; // end svgToString()
var recalculateAllSelectedDimensions = function() {
var text = (current_resize_mode == "none" ? "position" : "size");
var batchCmd = new BatchCommand(text);
var i = selectedElements.length;
while(i--) {
var cmd = recalculateSelectedDimensions(i);
if (cmd) {
batchCmd.addSubCommand(cmd);
}
}
if (!batchCmd.isEmpty()) {
addCommandToHistory(batchCmd);
call("changed", selectedElements);
}
};
// this is how we map paths to our preferred relative segment types
var pathMap = [ 0, 'z', 'm', 'm', 'l', 'l', 'c', 'c', 'q', 'q', 'a', 'a',
'l', 'l', 'l', 'l', // TODO: be less lazy below and map them to h and v
's', 's', 't', 't' ];
// this function returns the command which resulted from the selected change
var recalculateSelectedDimensions = function(i) {
var selected = selectedElements[i];
if (selected == null) return null;
var selectedBBox = selectedBBoxes[i];
var box = canvas.getBBox(selected);
// if we have not moved/resized, then immediately leave
if (box.x == selectedBBox.x && box.y == selectedBBox.y &&
box.width == selectedBBox.width && box.height == selectedBBox.height) {
return null;
}
// after this point, we have some change to this element
var remapx = function(x) {return parseInt(((x-box.x)/box.width)*selectedBBox.width + selectedBBox.x);}
var remapy = function(y) {return parseInt(((y-box.y)/box.height)*selectedBBox.height + selectedBBox.y);}
var scalew = function(w) {return parseInt(w*selectedBBox.width/box.width);}
var scaleh = function(h) {return parseInt(h*selectedBBox.height/box.height);}
var changes = {};
// if there was a rotation transform, re-set it, otherwise empty out the transform attribute
// This fixes Firefox 2- behavior - which does not reset values when the attribute has
// been removed, see https://bugzilla.mozilla.org/show_bug.cgi?id=320622
var angle = canvas.getRotationAngle(selected);
if (angle) {
var cx = remapx(box.x + box.width/2),
cy = remapy(box.y + box.height/2);
selected.setAttribute("transform", ["rotate(", angle, " ", cx, ",", cy, ")"].join(''));
}
else {
selected.setAttribute("transform", "");
selected.removeAttribute("transform");
}
switch (selected.tagName)
{
// NOTE: there's no way to create an actual polygon element except by editing source
// or importing from somewhere else
case "polygon":
// polygon is handled identically as polyline
case "polyline":
// extract the x,y from the path, adjust it and write back the new path
// but first, save the old path
changes["points"] = selected.getAttribute("points");
var list = selected.points;
var len = list.numberOfItems;
var newpoints = "";
for (var i = 0; i < len; ++i) {
var pt = list.getItem(i);
var x = remapx(pt.x), y = remapy(pt.y);
// we only need to scale the relative coordinates (no need to translate)
newpoints += x + "," + y + " ";
}
selected.setAttributeNS(null, "points", newpoints);
break;
case "path":
// extract the x,y from the path, adjust it and write back the new path
// but first, save the old path
changes["d"] = selected.getAttribute("d");
var M = selected.pathSegList.getItem(0);
var curx = M.x, cury = M.y;
var newd = "M" + remapx(curx) + "," + remapy(cury);
var segList = selected.pathSegList;
var len = segList.numberOfItems;
// for all path segments in the path, we first turn them into relative path segments,
// then we remap the coordinates from the resize
for (var i = 1; i < len; ++i) {
var seg = segList.getItem(i);
// if these properties are not in the segment, set them to zero
var x = seg.x || 0,
y = seg.y || 0,
x1 = seg.x1 || 0,
y1 = seg.y1 || 0,
x2 = seg.x2 || 0,
y2 = seg.y2 || 0;
var type = seg.pathSegType;
switch (type) {
case 1: // z,Z closepath (Z/z)
newd += "z";
continue;
// turn this into a relative segment then fall through
case 2: // absolute move (M)
case 4: // absolute line (L)
case 12: // absolute horizontal line (H)
case 14: // absolute vertical line (V)
case 18: // absolute smooth quad (T)
x -= curx;
y -= cury;
case 3: // relative move (m)
case 5: // relative line (l)
case 13: // relative horizontal line (h)
case 15: // relative vertical line (v)
case 19: // relative smooth quad (t)
curx += x;
cury += y;
newd += [" ", pathMap[type], scalew(x), ",", scaleh(y)].join('');
break;
case 6: // absolute cubic (C)
x -= curx; x1 -= curx; x2 -= curx;
y -= cury; y1 -= cury; y2 -= cury;
case 7: // relative cubic (c)
curx += x;
cury += y;
newd += [" c", scalew(x1), ",", scaleh(y1), " ", scalew(x2), ",", scaleh(y2),
" ", scalew(x), ",", scaleh(y)].join('');
break;
case 8: // absolute quad (Q)
x -= curx; x1 -= curx;
y -= cury; y1 -= cury;
case 9: // relative quad (q)
curx += x;
cury += y;
newd += [" q", scalew(x1), ",", scaleh(y1), " ", scalew(x), ",", scaleh(y)].join('');
break;
case 10: // absolute elliptical arc (A)
x -= curx;
y -= cury;
case 11: // relative elliptical arc (a)
curx += x;
cury += y;
newd += [ "a", scalew(seg.r1), ",", scaleh(seg.r2), " ", seg.angle, " ",
(seg.largeArcFlag ? 1 : 0), " ", (seg.sweepFlag ? 1 : 0), " ",
scalew(x), ",", scaleh(y) ].join('')
break;
case 16: // absolute smooth cubic (S)
x -= curx; x2 -= curx;
y -= cury; y2 -= cury;
case 17: // relative smooth cubic (s)
curx += x;
cury += y;
newd += [" s", scalew(x2), ",", scaleh(y2), " ", scalew(x), ",", scaleh(y)].join('');
break;
} // switch on path segment type
} // for each segment
selected.setAttributeNS(null, "d", newd);
break;
case "line":
changes["x1"] = selected.getAttribute("x1");
changes["y1"] = selected.getAttribute("y1");
changes["x2"] = selected.getAttribute("x2");
changes["y2"] = selected.getAttribute("y2");
var handle = svgroot.suspendRedraw(1000);
selected.setAttribute("x1", remapx(changes["x1"]));
selected.setAttribute("y1", remapy(changes["y1"]));
selected.setAttribute("x2", remapx(changes["x2"]));
selected.setAttribute("y2", remapy(changes["y2"]));
svgroot.unsuspendRedraw(handle);
break;
case "circle":
changes["cx"] = selected.getAttribute("cx");
changes["cy"] = selected.getAttribute("cy");
changes["r"] = selected.getAttribute("r");
var handle = svgroot.suspendRedraw(1000);
selected.setAttribute("cx", remapx(changes["cx"]));
selected.setAttribute("cy", remapy(changes["cy"]));
// take the minimum of the new selected box's dimensions for the new circle radius
selected.setAttribute("r", Math.min(selectedBBox.width/2,selectedBBox.height/2));
svgroot.unsuspendRedraw(handle);
break;
case "ellipse":
changes["cx"] = selected.getAttribute("cx");
changes["cy"] = selected.getAttribute("cy");
changes["rx"] = selected.getAttribute("rx");
changes["ry"] = selected.getAttribute("ry");
var handle = svgroot.suspendRedraw(1000);
selected.setAttribute("cx", remapx(changes["cx"]));
selected.setAttribute("cy", remapy(changes["cy"]));
selected.setAttribute("rx", scalew(changes["rx"]));
selected.setAttribute("ry", scaleh(changes["ry"]));
svgroot.unsuspendRedraw(handle);
break;
case "text":
changes["x"] = selected.getAttribute("x");
changes["y"] = selected.getAttribute("y");
var handle = svgroot.suspendRedraw(1000);
selected.setAttribute("x", remapx(changes["x"]));
selected.setAttribute("y", remapy(changes["y"]));
svgroot.unsuspendRedraw(handle);
break;
case "rect":
changes["x"] = selected.getAttribute("x");
changes["y"] = selected.getAttribute("y");
changes["width"] = selected.getAttribute("width");
changes["height"] = selected.getAttribute("height");
var handle = svgroot.suspendRedraw(1000);
selected.setAttribute("x", remapx(changes["x"]));
selected.setAttribute("y", remapy(changes["y"]));
selected.setAttribute("width", scalew(changes["width"]));
selected.setAttribute("height", scaleh(changes["height"]));
svgroot.unsuspendRedraw(handle);
break;
default: // rect
console.log("Unknown shape type: " + selected.tagName);
break;
}
if (changes) {
return new ChangeElementCommand(selected, changes);
}
};
// public events
this.clearSelection = function() {
if (selectedElements[0] == null) { return; }
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
var elem = selectedElements[i];
if (elem == null) break;
selectorManager.releaseSelector(elem);
selectedElements[i] = null;
selectedBBoxes[i] = null;
}
call("selected", selectedElements);
};
this.addToSelection = function(elemsToAdd) {
if (elemsToAdd.length == 0) { return; }
// find the first null in our selectedElements array
var j = 0;
while (j < selectedElements.length) {
if (selectedElements[j] == null) {
break;
}
++j;
}
// now add each element consecutively
var i = elemsToAdd.length;
while (i--) {
var elem = elemsToAdd[i];
// we ignore any selectors
if (elem.id.substr(0,13) == "selectorGrip_") continue;
// if it's not already there, add it
if (selectedElements.indexOf(elem) == -1) {
selectedElements[j] = elem;
selectedBBoxes[j++] = this.getBBox(elem);
selectorManager.requestSelector(elem);
call("selected", selectedElements);
}
}
};
//
this.removeFromSelection = function(elemsToRemove) {
if (selectedElements[0] == null) { return; }
if (elemsToRemove.length == 0) { return; }
// find every element and remove it from our array copy
var newSelectedItems = new Array(selectedElements.length);
var j = 0;
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
var elem = selectedElements[i];
if (elem) {
// keep the item
if (elemsToRemove.indexOf(elem) == -1) {
newSelectedItems[j++] = elem;
}
else { // remove the item and its selector
selectorManager.releaseSelector(elem);
}
}
}
// the copy becomes the master now
selectedElements = newSelectedItems;
};
// in mouseDown :
// - when we are in a create mode, the element is added to the canvas
// but the action is not recorded until mousing up
// - when we are in select mode, select the element, remember the position
// and do nothing else
var mouseDown = function(evt)
{
var x = evt.pageX - container.parentNode.offsetLeft + container.parentNode.scrollLeft;
var y = evt.pageY - container.parentNode.offsetTop + container.parentNode.scrollTop;
switch (current_mode) {
case "select":
started = true;
start_x = x;
start_y = y;
current_resize_mode = "none";
var t = evt.target;
// WebKit returns <div> when the canvas is clicked, Firefox/Opera return <svg>
var nodeName = t.nodeName.toLowerCase();
if (nodeName != "div" && nodeName != "svg") {
// if this element is not yet selected, clear selection and select it
if (selectedElements.indexOf(t) == -1) {
canvas.clearSelection();
canvas.addToSelection([t]);
current_poly = null;
}
// else if it's a poly, go into polyedit mode in mouseup
}
else {
canvas.clearSelection();
current_mode = "multiselect";
if (rubberBox == null) {
rubberBox = selectorManager.getRubberBandBox();
}
rubberBox.setAttribute("x", start_x);
rubberBox.setAttribute("y", start_y);
rubberBox.setAttribute("width", 0);
rubberBox.setAttribute("height", 0);
rubberBox.setAttribute("display", "inline");
}
break;
case "resize":
started = true;
start_x = x;
start_y = y;
break;
case "fhellipse":
case "fhrect":
case "path":
started = true;
start_x = x;
start_y = y;
d_attr = x + "," + y + " ";
addSvgElementFromJson({
"element": "polyline",
"attr": {
"points": d_attr,
"id": getNextId(),
"fill": "none",
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"stroke-linecap": "round",
"stroke-linejoin": "round",
"opacity": current_opacity / 2
}
});
freehand_min_x = x;
freehand_max_x = x;
freehand_min_y = y;
freehand_max_y = y;
break;
case "square":
// FIXME: once we create the rect, we lose information that this was a square
// (for resizing purposes this is important)
case "rect":
started = true;
start_x = x;
start_y = y;
addSvgElementFromJson({
"element": "rect",
"attr": {
"x": x,
"y": y,
"width": 0,
"height": 0,
"id": getNextId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity,
"opacity": current_opacity / 2
}
});
break;
case "line":
started = true;
addSvgElementFromJson({
"element": "line",
"attr": {
"x1": x,
"y1": y,
"x2": x,
"y2": y,
"id": getNextId(),
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"fill": "none",
"opacity": current_opacity / 2
}
});
break;
case "circle":
started = true;
addSvgElementFromJson({
"element": "circle",
"attr": {
"cx": x,
"cy": y,
"r": 0,
"id": getNextId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity,
"opacity": current_opacity / 2
}
});
break;
case "ellipse":
started = true;
addSvgElementFromJson({
"element": "ellipse",
"attr": {
"cx": x,
"cy": y,
"rx": 0,
"ry": 0,
"id": getNextId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity,
"opacity": current_opacity / 2
}
});
break;
case "text":
started = true;
var newText = addSvgElementFromJson({
"element": "text",
"attr": {
"x": x,
"y": y,
"id": getNextId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity,
// fix for bug where text elements were always 50% opacity
"opacity": current_opacity,
"font-size": current_font_size,
"font-family": current_font_family
}
});
newText.textContent = "text";
break;
case "poly":
started = true;
break;
case "polyedit":
started = true;
var id = evt.target.id;
if (id.substr(0,14) == "polypointgrip_") {
current_poly_pt_drag = parseInt(id.substr(14));
}
break;
default:
console.log("Unknown mode in mousedown: " + current_mode);
break;
}
};
// in this function we do not record any state changes yet (but we do update
// any elements that are still being created, moved or resized on the canvas)
// TODO: svgcanvas should just retain a reference to the image being dragged instead
// of the getId() and getElementById() funkiness - this will help us customize the ids
// a little bit for squares and polys
var mouseMove = function(evt)
{
if (!started) return;
var selected = selectedElements[0];
var x = evt.pageX - container.parentNode.offsetLeft + container.parentNode.scrollLeft;
var y = evt.pageY - container.parentNode.offsetTop + container.parentNode.scrollTop;
var shape = svgdoc.getElementById(getId());
switch (current_mode)
{
case "select":
// we temporarily use a translate on the element being dragged
// this transform is removed upon mousing up and the element is
// relocated to the new location
if (selectedElements[0] != null) {
var dx = x - start_x;
var dy = y - start_y;
if (dx != 0 || dy != 0) {
var ts = ["translate(",dx,",",dy,")"].join('');
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
var selected = selectedElements[i];
if (selected == null) break;
var box = canvas.getBBox(selected);
var angle = canvas.getRotationAngle(selected);
if (angle) {
var cx = box.x + box.width/2,
cy = box.y + box.height/2;
ts += [" rotate(", angle, " ", cx, ",", cy, ")"].join('');
}
selected.setAttribute("transform", ts);
box.x += dx; box.y += dy;
selectorManager.requestSelector(selected).resize(box);
selectedBBoxes[i] = box;
}
}
}
break;
case "multiselect":
rubberBox.setAttribute("x", Math.min(start_x,x));
rubberBox.setAttribute("y", Math.min(start_y,y));
rubberBox.setAttribute("width", Math.abs(x-start_x));
rubberBox.setAttribute("height", Math.abs(y-start_y));
// this code will probably be faster than using getIntersectionList(), but
// not as accurate (only grabs an element if the mouse happens to pass over
// its bbox and elements would never be released from selection)
// var nodeName = evt.target.nodeName.toLowerCase();
// if (nodeName != "div" && nodeName != "svg") {
// canvas.addToSelection([evt.target]);
// }
// clear out selection and set it to the new list
canvas.clearSelection();
canvas.addToSelection(getIntersectionList());
/*
// for each selected:
// - if newList contains selected, do nothing
// - if newList doesn't contain selected, remove it from selected
// - for any newList that was not in selectedElements, add it to selected
var elemsToRemove = [];
var newList = getIntersectionList();
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
var ind = newList.indexOf(selectedElements[i]);
if (ind == -1) {
elemsToRemove.push(selectedElements[i]);
}
else {
newList[ind] = null;
}
}
if (elemsToRemove.length > 0)
canvas.removeFromSelection(elemsToRemove);
*/
break;
case "resize":
// TODO: update this to handle rotated elements
// we track the resize bounding box and translate/scale the selected element
// while the mouse is down, when mouse goes up, we use this to recalculate
// the shape's coordinates
var box=canvas.getBBox(selected), left=box.x, top=box.y, width=box.width,
height=box.height, dx=(x-start_x), dy=(y-start_y);
var tx=0, ty=0, sx=1, sy=1;
var ts = null;
if(current_resize_mode.indexOf("n") != -1) {
ty = dy;
sy = (height-dy)/height;
}
else if(current_resize_mode.indexOf("s") != -1) {
sy = (height+dy)/height;
}
if(current_resize_mode.indexOf("e") != -1) {
sx = (width+dx)/width;
}
else if(current_resize_mode.indexOf("w") != -1) {
tx = dx;
sx = (width-dx)/width;
}
var selectedBBox = selectedBBoxes[0];
selectedBBox.x = left+tx;
selectedBBox.y = top+ty;
selectedBBox.width = width*sx;
selectedBBox.height = height*sy;
// normalize selectedBBox
if (selectedBBox.width < 0) {
selectedBBox.x += selectedBBox.width;
selectedBBox.width = -selectedBBox.width;
}
if (selectedBBox.height < 0) {
selectedBBox.y += selectedBBox.height;
selectedBBox.height = -selectedBBox.height;
}
// find the rotation transform and prepend it
var ts = [" translate(", (left+tx), ",", (top+ty), ") scale(", sx, ",", sy,
") translate(", -left, ",", -top, ")"].join('');
var angle = canvas.getRotationAngle(selected);
if (angle) {
var cx = selectedBBox.x + selectedBBox.width/2,
cy = selectedBBox.y + selectedBBox.height/2;
ts = ["rotate(", angle, " ", cx, ",", cy, ")", ts].join('')
}
selected.setAttribute("transform", ts);
selectorManager.requestSelector(selected).resize(selectedBBox);
break;
case "text":
var handle = svgroot.suspendRedraw(1000);
shape.setAttribute("x", x);
shape.setAttribute("y", y);
svgroot.unsuspendRedraw(handle);
break;
case "line":
var handle = svgroot.suspendRedraw(1000);
shape.setAttributeNS(null, "x2", x);
shape.setAttributeNS(null, "y2", y);
svgroot.unsuspendRedraw(handle);
break;
case "square":
var size = Math.max( Math.abs(x - start_x), Math.abs(y - start_y) );
var handle = svgroot.suspendRedraw(1000);
shape.setAttributeNS(null, "width", size);
shape.setAttributeNS(null, "height", size);
shape.setAttributeNS(null, "x", start_x < x ? start_x : start_x - size);
shape.setAttributeNS(null, "y", start_y < y ? start_y : start_y - size);
svgroot.unsuspendRedraw(handle);
break;
case "rect":
var handle = svgroot.suspendRedraw(1000);
shape.setAttributeNS(null, "x", Math.min(start_x,x));
shape.setAttributeNS(null, "y", Math.min(start_y,y));
shape.setAttributeNS(null, "width", Math.abs(x-start_x));
shape.setAttributeNS(null, "height", Math.abs(y-start_y));
svgroot.unsuspendRedraw(handle);
break;
case "circle":
var cx = shape.getAttributeNS(null, "cx");
var cy = shape.getAttributeNS(null, "cy");
var rad = Math.sqrt( (x-cx)*(x-cx) + (y-cy)*(y-cy) );
shape.setAttributeNS(null, "r", rad);
break;
case "ellipse":
var cx = shape.getAttributeNS(null, "cx");
var cy = shape.getAttributeNS(null, "cy");
var handle = svgroot.suspendRedraw(1000);
shape.setAttributeNS(null, "rx", Math.abs(x - cx) );
shape.setAttributeNS(null, "ry", Math.abs(y - cy) );
svgroot.unsuspendRedraw(handle);
break;
case "fhellipse":
case "fhrect":
freehand_min_x = Math.min(x, freehand_min_x);
freehand_max_x = Math.max(x, freehand_max_x);
freehand_min_y = Math.min(y, freehand_min_y);
freehand_max_y = Math.max(y, freehand_max_y);
// break; missing on purpose
case "path":
// var dx = x - start_x;
// var dy = y - start_y;
start_x = x;
start_y = y;
d_attr += + x + "," + y + " ";
shape.setAttributeNS(null, "points", d_attr);
break;
// update poly stretch line coordinates
case "poly":
var line = document.getElementById("poly_stretch_line");
if (line) {
line.setAttribute("x2", x);
line.setAttribute("y2", y);
}
break;
case "polyedit":
// if we are dragging a point, let's move it
if (current_poly_pt_drag != -1 && current_poly) {
var i = current_poly_pt_drag * 2;
var dx = x - current_poly_pts[i],
dy = y - current_poly_pts[i+1];
current_poly_pts[i] = x;
current_poly_pts[i+1] = y;
// reset the path's d attribute using current_poly_pts
var oldd = current_poly.getAttribute("d");
var closedPath = (oldd[oldd.length-1] == 'z' || oldd[oldd.length-1] == 'Z');
var len = current_poly_pts.length/2;
var arr = new Array(len+1);
var curx = current_poly_pts[0],
cury = current_poly_pts[1];
arr[0] = ["M", curx, ",", cury].join('');
for (var j = 1; j < len; ++j) {
var px = current_poly_pts[j*2], py = current_poly_pts[j*2+1];
arr[j] = ["l", (px-curx), ",", (py-cury)].join('');
curx = px;
cury = py;
}
if (closedPath) {
arr[len] = "z";
}
current_poly.setAttribute("d", arr.join(' '));
// move the point grip
var grip = document.getElementById("polypointgrip_" + current_poly_pt_drag);
if (grip) {
grip.setAttribute("cx", x);
grip.setAttribute("cy", y);
}
}
break;
default:
break;
}
// TODO: should we fire the change event here? I'm thinking only fire
// this event when the user mouses up. That's when the action (create,
// move, resize, draw) has finished
// Only question is whether in Wave Gadget mode whether we want to see the
// person live-dragging the element around (for instance)
// call("changed", selected);
};
var removeAllPointGripsFromPoly = function() {
// loop through and hide all pointgrips
var i = current_poly_pts.length/2;
while(i--) {
document.getElementById("polypointgrip_"+i).setAttribute("display", "none");
}
document.getElementById("poly_stretch_line").setAttribute("display", "none");
};
var addAllPointGripsToPoly = function() {
// loop through and hide all pointgrips
var i = current_poly_pts.length;
while(i) {
i -= 2;
var grip = document.getElementById("polypointgrip_"+i/2);
grip.setAttribute("cx", current_poly_pts[i]);
grip.setAttribute("cy", current_poly_pts[i+1]);
grip.setAttribute("display", "inline");
}
};
var addPointGripToPoly = function(x,y) {
// create the container of all the point grips
var pointGripContainer = document.getElementById("polypointgrip_container");
if (!pointGripContainer) {
var parent = document.getElementById("selectorParentGroup");
pointGripContainer = parent.appendChild(document.createElementNS(svgns, "g"));
pointGripContainer.id = "polypointgrip_container";
}
// get index of this point
var index = current_poly_pts.length/2 - 1;
var pointGrip = document.getElementById("polypointgrip_"+index);
// create it
if (!pointGrip) {
pointGrip = document.createElementNS(svgns, "circle");
pointGrip.id = "polypointgrip_" + index;
pointGrip.setAttribute("display", "none");
pointGrip.setAttribute("r", 4);
pointGrip.setAttribute("fill", "#0F0");
pointGrip.setAttribute("stroke", "#00F");
pointGrip.setAttribute("stroke-width", 2);
pointGrip.setAttribute("cursor", "move");
pointGrip.setAttribute("pointer-events", "all");
pointGrip = pointGripContainer.appendChild(pointGrip);
var grip = $('#polypointgrip_'+index);
grip.mouseover( function() { this.setAttribute("stroke", "#F00"); } );
grip.mouseout( function() {this.setAttribute("stroke", "#00F"); } );
}
// set up the point grip element and display it
pointGrip.setAttribute("cx", x);
pointGrip.setAttribute("cy", y);
pointGrip.setAttribute("display", "inline");
};
// - in create mode, the element's opacity is set properly, we create an InsertElementCommand
// and store it on the Undo stack
// - in move/resize mode, the element's attributes which were affected by the move/resize are
// identified, a ChangeElementCommand is created and stored on the stack for those attrs
// this is done in when we recalculate the selected dimensions()
var mouseUp = function(evt)
{
if (!started) return;
var x = evt.pageX - container.parentNode.offsetLeft + container.parentNode.scrollLeft;
var y = evt.pageY - container.parentNode.offsetTop + container.parentNode.scrollTop;
started = false;
var element = svgdoc.getElementById(getId());
var keep = false;
switch (current_mode)
{
// intentionally fall-through to select here
case "resize":
case "multiselect":
if (rubberBox != null) {
rubberBox.setAttribute("display", "none");
}
current_mode = "select";
case "select":
if (selectedElements[0] != null) {
// if we only have one selected element
if (selectedElements[1] == null) {
// set our current stroke/fill properties to the element's
var selected = selectedElements[0];
current_fill = selected.getAttribute("fill");
current_fill_opacity = selected.getAttribute("fill-opacity");
current_stroke = selected.getAttribute("stroke");
current_stroke_opacity = selected.getAttribute("stroke-opacity");
current_stroke_width = selected.getAttribute("stroke-width");
current_stroke_style = selected.getAttribute("stroke-dasharray");
if (selected.tagName == "text") {
current_font_size = selected.getAttribute("font-size");
current_font_family = selected.getAttribute("font-family");
}
selectorManager.requestSelector(selected).showGrips(selected.tagName != "text");
}
// if it was being dragged/resized
if (x != start_x || y != start_y) {
recalculateAllSelectedDimensions();
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
if (selectedElements[i] == null) break;
selectorManager.requestSelector(selectedElements[i]).resize(selectedBBoxes[i]);
}
}
// no change in position/size, so maybe we should move to polyedit
else {
// TODO: this causes a poly that was just going to be selected to go straight to polyedit
if (selectedElements[0].nodeName == "path" && selectedElements[1] == null) {
var t = evt.target;
if (current_poly == t) {
current_mode = "polyedit";
// recalculate current_poly_pts
current_poly_pts = [];
var segList = t.pathSegList;
var curx = segList.getItem(0).x, cury = segList.getItem(0).y;
current_poly_pts.push(curx);
current_poly_pts.push(cury);
var len = segList.numberOfItems;
for (var i = 1; i < len; ++i) {
var l = segList.getItem(i);
var x = l.x, y = l.y;
// polys can now be closed, skip Z segments
if (l.pathSegType == 1) {
break;
}
var type = l.pathSegType;
// current_poly_pts just holds the absolute coords
if (type == 4) {
curx = x;
cury = y;
} // type 4 (abs line)
else if (type == 5) {
curx += x;
cury += y;
} // type 5 (rel line)
current_poly_pts.push(curx);
current_poly_pts.push(cury);
} // for each segment
canvas.clearSelection();
addAllPointGripsToPoly();
} // going into polyedit mode
else {
current_poly = t;
}
} // no change in mouse position
}
}
// we return immediately from select so that the obj_num is not incremented
return;
break;
case "path":
keep = true;
break;
case "line":
keep = (element.getAttribute('x1') != element.getAttribute('x2') ||
element.getAttribute('y1') == element.getAttribute('y2'));
break;
case "square":
case "rect":
keep = (element.getAttribute('width') != 0 ||
element.getAttribute('height') != 0);
break;
case "circle":
keep = (element.getAttribute('r') != 0);
break;
case "ellipse":
keep = (element.getAttribute('rx') != 0 ||
element.getAttribute('ry') != 0);
break;
case "fhellipse":
if ((freehand_max_x - freehand_min_x) > 0 &&
(freehand_max_y - freehand_min_y) > 0) {
element = addSvgElementFromJson({
"element": "ellipse",
"attr": {
"cx": (freehand_min_x + freehand_max_x) / 2,
"cy": (freehand_min_y + freehand_max_y) / 2,
"rx": (freehand_max_x - freehand_min_x) / 2,
"ry": (freehand_max_y - freehand_min_y) / 2,
"id": getId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"opacity": current_opacity,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity
}
});
call("changed",[element]);
keep = true;
}
break;
case "fhrect":
if ((freehand_max_x - freehand_min_x) > 0 &&
(freehand_max_y - freehand_min_y) > 0) {
element = addSvgElementFromJson({
"element": "rect",
"attr": {
"x": freehand_min_x,
"y": freehand_min_y,
"width": (freehand_max_x - freehand_min_x),
"height": (freehand_max_y - freehand_min_y),
"id": getId(),
"fill": current_fill,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"opacity": current_opacity,
"stroke-opacity": current_stroke_opacity,
"fill-opacity": current_fill_opacity
}
});
call("changed",[element]);
keep = true;
}
break;
case "text":
keep = true;
canvas.clearSelection();
canvas.addToSelection([element]);
break;
case "poly":
// set element to null here so that it is not removed nor finalized
element = null;
// continue to be set to true so that mouseMove happens
started = true;
var stretchy = document.getElementById("poly_stretch_line");
if (!stretchy) {
stretchy = document.createElementNS(svgns, "line");
stretchy.id = "poly_stretch_line";
stretchy.setAttribute("stroke-width", "0.5");
stretchy.setAttribute("stroke", "blue");
stretchy = document.getElementById("selectorParentGroup").appendChild(stretchy);
}
stretchy.setAttribute("display", "inline");
// if pts array is empty, create path element with M at current point
if (current_poly_pts.length == 0) {
current_poly_pts.push(x);
current_poly_pts.push(y);
d_attr = "M" + x + "," + y + " ";
addSvgElementFromJson({
"element": "path",
"attr": {
"d": d_attr,
"id": getNextId(),
"fill": current_fill,
"fill-opacity": current_fill_opacity,
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"opacity": current_opacity / 2
}
});
// set stretchy line to first point
stretchy.setAttribute("x1", x);
stretchy.setAttribute("y1", y);
stretchy.setAttribute("x2", x);
stretchy.setAttribute("y2", y);
addPointGripToPoly(x,y);
}
else {
// determine if we clicked on an existing point
var i = current_poly_pts.length;
var FUZZ = 6;
var clickOnPoint = false;
while(i) {
i -= 2;
var px = current_poly_pts[i], py = current_poly_pts[i+1];
// found a matching point
if ( x >= (px-FUZZ) && x <= (px+FUZZ) && y >= (py-FUZZ) && y <= (py+FUZZ) ) {
clickOnPoint = true;
break;
}
}
// get poly element that we are in the process of creating
var poly = svgdoc.getElementById(getId());
// if we clicked on an existing point, then we are done this poly, commit it
// (i,i+1) are the x,y that were clicked on
if (clickOnPoint) {
// if clicked on any other point but the first OR
// the first point was clicked on and there are less than 3 points
// then leave the poly open
// otherwise, close the poly
if (i == 0 && current_poly_pts.length >= 6) {
poly.setAttribute("d", d_attr + "z");
}
removeAllPointGripsFromPoly();
// this will signal to commit the poly
element = poly;
current_poly_pts = [];
started = false;
}
// else, create a new point, append to pts array, update path element
else {
var len = current_poly_pts.length;
var lastx = current_poly_pts[len-2], lasty = current_poly_pts[len-1];
// we store absolute values in our poly points array for easy checking above
current_poly_pts.push(x);
current_poly_pts.push(y);
// but we store relative coordinates in the d string of the poly for easy
// translation around the canvas in move mode
d_attr += "l" + parseInt(x-lastx) + "," + parseInt(y-lasty) + " ";
poly.setAttribute("d", d_attr);
// set stretchy line to latest point
stretchy.setAttribute("x1", x);
stretchy.setAttribute("y1", y);
stretchy.setAttribute("x2", x);
stretchy.setAttribute("y2", y);
addPointGripToPoly(x,y);
}
keep = true;
}
break;
case "polyedit":
keep = true;
element = null;
// if we were dragging a poly point, stop it now
if (current_poly_pt_drag != -1) {
current_poly_pt_drag = -1;
}
// else, move back to select mode
else {
current_mode = "select";
removeAllPointGripsFromPoly();
canvas.addToSelection([evt.target]);
}
break;
default:
console.log("Unknown mode in mouseup: " + current_mode);
break;
}
if (!keep && element != null) {
element.parentNode.removeChild(element);
element = null;
} else if (element != null) {
element.setAttribute("opacity", current_opacity);
cleanupElement(element);
selectorManager.update();
// we create the insert command that is stored on the stack
// undo means to call cmd.unapply(), redo means to call cmd.apply()
addCommandToHistory(new InsertElementCommand(element));
call("changed",[element]);
}
};
// public functions
this.save = function() {
// remove the selected outline before serializing
this.clearSelection();
var str = "<?xml version=\"1.0\" standalone=\"no\"?>\n";
// no need for doctype, see http://jwatt.org/svg/authoring/#doctype-declaration
str += svgToString(svgroot, 0);
this.saveHandler(str);
};
this.getSvgString = function() {
return svgToString(svgroot, 0);
};
// this function returns false if the set was unsuccessful, true otherwise
// TODO: should this function keep throwing the exception?
// TODO: after parsing in the new text, do we need to synchronize getId()?
this.setSvgString = function(xmlString) {
try {
// convert string into XML document
var newDoc = Utils.text2xml(xmlString);
// run it through our sanitizer to remove anything we do not support
sanitizeSvg(newDoc.documentElement);
var batchCmd = new BatchCommand("Change Source");
// save our old selectorParentGroup
selectorManager.selectorParentGroup = svgroot.removeChild(selectorManager.selectorParentGroup);
// remove old root
var oldroot = container.removeChild(svgroot);
batchCmd.addSubCommand(new RemoveElementCommand(oldroot, container));
// set new root
svgroot = container.appendChild(svgdoc.importNode(newDoc.documentElement, true));
batchCmd.addSubCommand(new InsertElementCommand(svgroot));
// add back in parentSelectorGroup
svgroot.appendChild(selectorManager.selectorParentGroup);
addCommandToHistory(batchCmd);
call("changed", [svgroot]);
} catch(e) {
console.log(e);
return false;
}
return true;
};
this.clear = function() {
var nodes = svgroot.childNodes;
var len = svgroot.childNodes.length;
var i = 0;
this.clearSelection();
for(var rep = 0; rep < len; rep++){
if (nodes[i].nodeType == 1) { // element node
nodes[i].parentNode.removeChild(nodes[i]);
} else {
i++;
}
}
// clear the undo stack
resetUndoStack();
call("cleared");
};
this.getResolution = function() {
return [svgroot.getAttribute("width"), svgroot.getAttribute("height")];
};
this.setResolution = function(x, y) {
var w = svgroot.getAttribute("width"),
h = svgroot.getAttribute("height");
var handle = svgroot.suspendRedraw(1000);
svgroot.setAttribute("width", x);
svgroot.setAttribute("height", y);
svgroot.unsuspendRedraw(handle);
addCommandToHistory(new ChangeElementCommand(svgroot, {"width":w,"height":h}, "resolution"));
call("changed", [svgroot]);
};
this.getMode = function() {
return current_mode;
};
this.setMode = function(name) {
// toss out half-drawn poly
if (current_mode == "poly" && current_poly_pts.length > 0) {
var elem = svgdoc.getElementById(getId());
elem.parentNode.removeChild(elem);
removeAllPointGripsFromPoly();
canvas.clearSelection();
started = false;
current_poly = null;
current_poly_pts = [];
}
current_mode = name;
};
this.getStrokeColor = function() {
return current_stroke;
};
this.setStrokeColor = function(val) {
current_stroke = val;
this.changeSelectedAttribute("stroke", val);
};
this.getFillColor = function() {
return current_fill;
};
this.setFillColor = function(val) {
current_fill = val;
// take out any path/line elements when setting fill
var elems = [];
var i = selectedElements.length;
while(i--) {
var elem = selectedElements[i];
if (elem && elem.tagName != "polyline" && elem.tagName != "line") {
elems.push(elem);
}
}
if (elems.length > 0)
this.changeSelectedAttribute("fill", val, elems);
};
var findDefs = function() {
var defs = svgroot.getElementsByTagNameNS(svgns, "defs");
if (defs.length > 0) {
defs = defs[0];
}
else {
defs = svgroot.insertBefore( svgdoc.createElementNS(svgns, "defs" ), svgroot.firstChild);
}
return defs;
};
var findDuplicateGradient = function(grad) {
var defs = findDefs();
var existing_grads = defs.getElementsByTagNameNS(svgns, "linearGradient");
var i = existing_grads.length;
while (i--) {
var og = existing_grads.item(i);
if (grad.getAttribute('x1') != og.getAttribute('x1') ||
grad.getAttribute('y1') != og.getAttribute('y1') ||
grad.getAttribute('x2') != og.getAttribute('x2') ||
grad.getAttribute('y2') != og.getAttribute('y2'))
{
continue;
}
// else could be a duplicate, iterate through stops
var stops = grad.getElementsByTagNameNS(svgns, "stop");
var ostops = og.getElementsByTagNameNS(svgns, "stop");
if (stops.length != ostops.length) {
continue;
}
var j = stops.length;
while(j--) {
var stop = stops.item(j);
var ostop = ostops.item(j);
if (stop.getAttribute('offset') != ostop.getAttribute('offset') ||
stop.getAttribute('stop-opacity') != ostop.getAttribute('stop-opacity') ||
stop.getAttribute('stop-color') != ostop.getAttribute('stop-color'))
{
break;
}
}
if (j == -1) {
return og;
}
} // for each gradient in defs
return null;
};
this.setStrokePaint = function(p) {
current_stroke_paint = new $.jGraduate.Paint(p);
if (current_stroke_paint.type == "solidColor") {
this.setStrokeColor("#"+current_stroke_paint.solidColor);
}
else if(current_stroke_paint.type == "linearGradient") {
// find out if there is a duplicate gradient already in the defs
var grad = current_stroke_paint.linearGradient;
var duplicate_grad = findDuplicateGradient(grad);
var defs = findDefs();
// no duplicate found, so import gradient into defs
if (!duplicate_grad) {
grad = defs.appendChild( svgdoc.importNode(grad, true) );
// get next id and set it on the grad
grad.id = getNextId();
}
else { // use existing gradient
grad = duplicate_grad;
}
this.setStrokeColor("url(#" + grad.id + ")");
}
else {
// console.log("none!");
}
this.setStrokeOpacity(current_stroke_paint.alpha/100);
};
// TODO: rework this so that we are not append elements into the SVG at this stage
// This should only be done at the actual creation stage or when we change a selected
// element's fill paint - at that point, batch up the creation of the gradient element
// with the creation/change
this.setFillPaint = function(p) {
// copy the incoming paint object
current_fill_paint = new $.jGraduate.Paint(p);
if (current_fill_paint.type == "solidColor") {
this.setFillColor("#"+current_fill_paint.solidColor);
}
else if(current_fill_paint.type == "linearGradient") {
// find out if there is a duplicate gradient already in the defs
var grad = current_fill_paint.linearGradient;
var duplicate_grad = findDuplicateGradient(grad);
var defs = findDefs();
// no duplicate found, so import gradient into defs
if (!duplicate_grad) {
grad = defs.appendChild( svgdoc.importNode(grad, true) );
// get next id and set it on the grad
grad.id = getNextId();
}
else { // use existing gradient
grad = duplicate_grad;
}
this.setFillColor("url(#" + grad.id + ")");
}
else {
// console.log("none!");
}
this.setFillOpacity(current_fill_paint.alpha/100);
};
this.getStrokeWidth = function() {
return current_stroke_width;
};
this.setStrokeWidth = function(val) {
current_stroke_width = val;
this.changeSelectedAttribute("stroke-width", val);
};
this.getStrokeStyle = function() {
return current_stroke_style;
};
this.setStrokeStyle = function(val) {
current_stroke_style = val;
this.changeSelectedAttribute("stroke-dasharray", val);
};
this.getOpacity = function() {
return current_opacity;
};
this.setOpacity = function(val) {
current_opacity = val;
this.changeSelectedAttribute("opacity", val);
};
this.getFillOpacity = function() {
return current_fill_opacity;
};
this.setFillOpacity = function(val) {
current_fill_opacity = val;
this.changeSelectedAttribute("fill-opacity", val);
};
this.getStrokeOpacity = function() {
return current_stroke_opacity;
};
this.setStrokeOpacity = function(val) {
current_stroke_opacity = val;
this.changeSelectedAttribute("stroke-opacity", val);
};
this.getBBox = function(elem) {
var selected = elem || selectedElements[0];
var bbox = selected.getBBox();
// determine the bounding box if rotated (NOTE: this won't be
// the tightest possible bounding box, for it will do)
var angle = this.getRotationAngle(selected) * Math.PI / 180.0;
if (angle) {
var w2 = bbox.width/2, h2 = bbox.height/2,
cx = bbox.x + w2, cy = bbox.y + h2;
var pts = [ [-w2,-h2], [w2,-h2],
[w2,h2], [-w2,h2] ];
var r = Math.sqrt( w2*w2 + h2*h2 );
var i = 4;
var MINX = Number.MAX_VALUE, MINY = Number.MAX_VALUE,
MAXX = Number.MIN_VALUE, MAXY = Number.MIN_VALUE;
while (i--) {
var theta = angle + Math.atan2(pts[i][1],pts[i][0]);
var x = r * Math.cos(theta),
y = r * Math.sin(theta);
if (MINX > x) { MINX = x; }
if (MINY > y) { MINY = y; }
if (MAXX < x) { MAXX = x; }
if (MAXY < y) { MAXY = y; }
}
bbox.x = cx + parseInt(MINX);
bbox.y = cy + parseInt(MINY);
bbox.width = parseInt(MAXX-MINX);
bbox.height = parseInt(MAXY-MINY);
}
return bbox;
};
this.getRotationAngle = function(elem) {
var selected = elem || selectedElements[0];
// find the rotation transform (if any) and set it
var tlist = selected.transform.baseVal;
var t = tlist.numberOfItems;
var foundRot = false;
while (t--) {
var xform = tlist.getItem(t);
if (xform.type == 4) {
return xform.angle;
}
}
return 0;
};
this.setRotationAngle = function(val) {
var elem = selectedElements[0];
var bbox = this.getBBox(elem);
this.changeSelectedAttribute("transform", "rotate(" + val + " " +
(bbox.x+bbox.width/2) + "," +
(bbox.y+bbox.height/2) + ")");
};
this.each = function(cb) {
$(svgroot).children().each(cb);
};
this.bind = function(event, f) {
events[event] = f;
};
this.setIdPrefix = function(p) {
idprefix = p;
};
this.getBold = function() {
// should only have one element selected
var selected = selectedElements[0];
if (selected != null && selected.tagName == "text" &&
selectedElements[1] == null)
{
return (selected.getAttribute("font-weight") == "bold");
}
return false;
};
this.setBold = function(b) {
var selected = selectedElements[0];
if (selected != null && selected.tagName == "text" &&
selectedElements[1] == null)
{
this.changeSelectedAttribute("font-weight", b ? "bold" : "normal");
}
};
this.getItalic = function() {
var selected = selectedElements[0];
if (selected != null && selected.tagName == "text" &&
selectedElements[1] == null)
{
return (selected.getAttribute("font-style") == "italic");
}
return false;
};
this.setItalic = function(i) {
var selected = selectedElements[0];
if (selected != null && selected.tagName == "text" &&
selectedElements[1] == null)
{
this.changeSelectedAttribute("font-style", i ? "italic" : "normal");
}
};
this.getFontFamily = function() {
return current_font_family;
};
this.setFontFamily = function(val) {
current_font_family = val;
this.changeSelectedAttribute("font-family", val);
};
this.getFontSize = function() {
return current_font_size;
};
this.setFontSize = function(val) {
current_font_size = val;
this.changeSelectedAttribute("font-size", val);
};
this.getText = function() {
var selected = selectedElements[0];
if (selected == null) { return ""; }
return selected.textContent;
};
this.setTextContent = function(val) {
this.changeSelectedAttribute("#text", val);
};
this.setRectRadius = function(val) {
var selected = selectedElements[0];
if (selected != null && selected.tagName == "rect") {
var r = selected.getAttribute("rx");
if (r != val) {
selected.setAttribute("rx", val);
selected.setAttribute("ry", val);
addCommandToHistory(new ChangeElementCommand(selected, {"rx":r, "ry":r}, "Radius"));
call("changed", [selected]);
}
}
};
// If you want to change all selectedElements, ignore the elems argument.
// If you want to change only a subset of selectedElements, then send the
// subset to this function in the elems argument.
this.changeSelectedAttribute = function(attr, val, elems) {
var elems = elems || selectedElements;
var batchCmd = new BatchCommand("Change " + attr);
var i = elems.length;
var handle = svgroot.suspendRedraw(1000);
while(i--) {
var elem = elems[i];
if (elem == null) continue;
var oldval = (attr == "#text" ? elem.textContent : elem.getAttribute(attr));
if (oldval != val) {
if (attr == "#text") elem.textContent = val;
else elem.setAttribute(attr, val);
selectedBBoxes[i] = this.getBBox(elem);
// Timeout needed for Opera & Firefox
setTimeout(function() {
selectorManager.requestSelector(elem).resize(selectedBBoxes[i]);
},0);
var changes = {};
changes[attr] = oldval;
batchCmd.addSubCommand(new ChangeElementCommand(elem, changes, attr));
}
}
svgroot.unsuspendRedraw(handle);
if (!batchCmd.isEmpty()) {
addCommandToHistory(batchCmd);
call("changed", elems);
}
};
$(container).mouseup(mouseUp);
$(container).mousedown(mouseDown);
$(container).mousemove(mouseMove);
// TODO: Unfortunately Mozilla does not handle internal references to gradients
// inside a data: URL document. This means that any elements filled/stroked
// with a gradient will appear black in Firefox, etc. See bug 308590
// https://bugzilla.mozilla.org/show_bug.cgi?id=308590
this.saveHandler = function(svg) {
window.open("data:image/svg+xml;base64," + Utils.encode64(svg));
};
this.deleteSelectedElements = function() {
var batchCmd = new BatchCommand("Delete Elements");
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
var selected = selectedElements[i];
if (selected == null) break;
var parent = selected.parentNode;
var t = selected;
// this will unselect the element and remove the selectedOutline
selectorManager.releaseSelector(t);
var elem = parent.removeChild(t);
selectedElements[i] = null;
batchCmd.addSubCommand(new RemoveElementCommand(elem, parent));
}
if (!batchCmd.isEmpty()) addCommandToHistory(batchCmd);
call("selected", selectedElements);
};
this.moveToTopSelectedElement = function() {
var selected = selectedElements[0];
if (selected != null) {
var t = selected;
var oldParent = t.parentNode;
var oldNextSibling = t.nextSibling;
if (oldNextSibling == selectorManager.selectorParentGroup) oldNextSibling = null;
t = t.parentNode.appendChild(t);
addCommandToHistory(new MoveElementCommand(t, oldNextSibling, oldParent, "top"));
}
};
this.moveToBottomSelectedElement = function() {
var selected = selectedElements[0];
if (selected != null) {
var t = selected;
var oldParent = t.parentNode;
var oldNextSibling = t.nextSibling;
if (oldNextSibling == selectorManager.selectorParentGroup) oldNextSibling = null;
var firstChild = t.parentNode.firstChild;
if (firstChild.tagName == 'defs') {
firstChild = firstChild.nextSibling;
}
t = t.parentNode.insertBefore(t, firstChild);
addCommandToHistory(new MoveElementCommand(t, oldNextSibling, oldParent, "bottom"));
}
};
this.moveSelectedElements = function(dx,dy,undoable) {
// if undoable is not sent, default to true
var undoable = undoable || true;
var batchCmd = new BatchCommand("position");
var i = selectedElements.length;
while (i--) {
var selected = selectedElements[i];
if (selected != null) {
selectedBBoxes[i] = this.getBBox(selected);
selectedBBoxes[i].x += dx;
selectedBBoxes[i].y += dy;
var cmd = recalculateSelectedDimensions(i);
if (cmd) {
batchCmd.addSubCommand(cmd);
}
selectorManager.requestSelector(selected).resize(selectedBBoxes[i]);
}
}
if (!batchCmd.isEmpty()) {
if (undoable)
addCommandToHistory(batchCmd);
call("changed", selectedElements);
}
};
var resetUndoStack = function() {
undoStack = [];
undoStackPointer = 0;
};
this.getUndoStackSize = function() { return undoStackPointer; };
this.getRedoStackSize = function() { return undoStack.length - undoStackPointer; };
this.getNextUndoCommandText = function() {
if (undoStackPointer > 0)
return undoStack[undoStackPointer-1].text;
return "";
};
this.getNextRedoCommandText = function() {
if (undoStackPointer < undoStack.length)
return undoStack[undoStackPointer].text;
return "";
};
this.undo = function() {
if (undoStackPointer > 0) {
this.clearSelection();
var cmd = undoStack[--undoStackPointer];
cmd.unapply();
call("changed", cmd.elements());
}
};
this.redo = function() {
if (undoStackPointer < undoStack.length && undoStack.length > 0) {
this.clearSelection();
var cmd = undoStack[undoStackPointer++];
cmd.apply();
call("changed", cmd.elements());
}
};
// this creates deep DOM copies (clones) of all selected elements
this.cloneSelectedElements = function() {
var batchCmd = new BatchCommand("Clone Elements");
var copiedElements = [];
var len = selectedElements.length;
for (var i = 0; i < len; ++i) {
if (selectedElements[i] == null) break;
copiedElements.push(selectedElements[i].cloneNode(true));
}
this.clearSelection();
var len = copiedElements.length;
for (var i = 0; i < len; ++i) {
var elem = copiedElements[i];
elem.id = getNextId();
svgroot.appendChild(elem);
batchCmd.addSubCommand(new InsertElementCommand(elem));
}
if (!batchCmd.isEmpty()) {
this.addToSelection(copiedElements);
this.moveSelectedElements(20,20,false);
addCommandToHistory(batchCmd);
call("selected", selectedElements);
}
};
}
// Static class for various utility functions
var Utils = {
// This code was written by Tyler Akins and has been placed in the
// public domain. It would be nice if you left this header intact.
// Base64 code from Tyler Akins -- http://rumkin.com
// schiller: Removed string concatenation in favour of Array.join() optimization,
// also precalculate the size of the array needed.
"_keyStr" : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
"encode64" : function(input) {
// base64 strings are 4/3 larger than the original string
var output = new Array( Math.floor( (input.length + 2) / 3 ) * 4 );
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0, p = 0;
do {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output[p++] = this._keyStr.charAt(enc1);
output[p++] = this._keyStr.charAt(enc2);
output[p++] = this._keyStr.charAt(enc3);
output[p++] = this._keyStr.charAt(enc4);
} while (i < input.length);
return output.join('');
},
"rectsIntersect": function(r1, r2) {
return r2.x < (r1.x+r1.width) &&
(r2.x+r2.width) > r1.x &&
r2.y < (r1.y+r1.height) &&
(r2.y+r2.height) > r1.y;
},
// found this function http://groups.google.com/group/jquery-dev/browse_thread/thread/c6d11387c580a77f
"text2xml": function(sXML) {
// NOTE: I'd like to use jQuery for this, but jQuery makes all tags uppercase
//return $(xml)[0];
var out;
try{
var dXML = ($.browser.msie)?new ActiveXObject("Microsoft.XMLDOM"):new DOMParser();
dXML.async = false;
} catch(e){
throw new Error("XML Parser could not be instantiated");
};
try{
if($.browser.msie) out = (dXML.loadXML(sXML))?dXML:false;
else out = dXML.parseFromString(sXML, "text/xml");
}
catch(e){ throw new Error("Error parsing XML string"); };
return out;
}
};