svgedit/editor/svgcanvas.js

1295 lines
39 KiB
JavaScript

if(!window.console) {
window.console = new function() {
this.log = function(str) {};
this.dir = function(str) {};
};
}
// 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;
};
}
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);
};
}
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); };
}
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);
};
}
// 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
// TODO: create a 'batch' command object that you can add an arbitrary number of
// commands to (this will be useful for making changes to many elements in a
// multiselection at one, we don't want to have to undo each element's change)
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.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": (dir + "_grip" + this.id),
"fill": "blue",
"width": 6,
"height": 6,
"style": ("cursor:" + dir + "-resize"),
// when we are in rotate mode, we will set rx/ry to 3
// "rx": 3,
// "ry": 3,
// 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",
}
}) );
$('#'+this.selectorGrips[dir].id).mousedown( function() {
current_mode = "resize";
current_resize_mode = this.id.substr(0,this.id.indexOf("_"));
});
}
this.showGrips = function(show) {
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 l=bbox.x-offset, t=bbox.y-offset, w=bbox.width+(offset<<1), h=bbox.height+(offset<<1);
selectedBox.x.baseVal.value = l;
selectedBox.y.baseVal.value = t;
selectedBox.width.baseVal.value = w;
selectedBox.height.baseVal.value = h;
selectedGrips.nw.x.baseVal.value = l-3;
selectedGrips.nw.y.baseVal.value = t-3;
selectedGrips.ne.x.baseVal.value = l+w-3;
selectedGrips.ne.y.baseVal.value = t-3;
selectedGrips.sw.x.baseVal.value = l-3;
selectedGrips.sw.y.baseVal.value = t+h-3;
selectedGrips.se.x.baseVal.value = l+w-3;
selectedGrips.se.y.baseVal.value = t+h-3;
selectedGrips.n.x.baseVal.value = l+w/2-3;
selectedGrips.n.y.baseVal.value = t-3;
selectedGrips.w.x.baseVal.value = l-3;
selectedGrips.w.y.baseVal.value = t+h/2-3;
selectedGrips.e.x.baseVal.value = l+w-3;
selectedGrips.e.y.baseVal.value = t+h/2-3;
selectedGrips.s.x.baseVal.value = l+w/2-3;
selectedGrips.s.y.baseVal.value = t+h-3;
};
};
// TODO: consider a map of SVG elements to their selectors in the manager for
// quick access to the selector in question (as opposed to looping through the array)
function SelectorManager() {
// this will hold the <g> element that contains all selector rects/grips
this.selectorParentGroup = null;
// this will hold objects of type Selector (see above)
this.selectors = [];
this.requestSelector = function(elem) {
var N = this.selectors.length;
// if this is the first time a selector is being requested
// create the group, add it to the DOM and save a reference to it
if (this.selectorParentGroup == null) {
this.selectorParentGroup = addSvgElementFromJson({
"element": "g",
"attr": {"id": "selectorParentGroup"}
});
}
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);
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);
return this.selectors[N];
};
this.releaseSelector = function(sel) {
var N = this.selectors.length;
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");
}
sel.locked = false;
sel.selectedElement = null;
// 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);
}
}
// **************************************************************************************
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 = "none";
var current_stroke = "black";
var current_stroke_width = 1;
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 selected = null;
var selectedBBox = null;
var selectedOperation = 'resize'; // could be {resize,rotate}
var selectorManager = new SelectorManager();
var theSelector = null;
var events = {};
var undoStackPointer = 0;
var undoStack = [];
// 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)
function addCommandToHistory(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[undoStack.length] = cmd;
undoStackPointer = undoStack.length;
// console.log("after add command, stackPointer=" + undoStackPointer);
// console.log(undoStack);
}
// private functions
var getId = function() {
if (events["getid"]) return call("getid", obj_num);
return idprefix + obj_num;
}
var call = function(event, arg) {
if (events[event]) {
return events[event](this,arg);
}
}
var assignAttributes = function(node, attrs) {
for (i in attrs) {
node.setAttributeNS(null, i, attrs[i]);
}
}
// remove unneeded attributes
// makes resulting SVG smaller
var cleanupElement = function(element) {
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')
}
var addSvgElementFromJson = function(data) {
return canvas.updateElementFromJson(data)
}
var svgToString = function(elem, indent) {
// TODO: could use the array.join() optimization trick here too
var out = "";
if (elem) {
var attrs = elem.attributes;
var attr;
var i;
var childs = elem.childNodes;
for (i=0; i<indent; i++) out += " ";
out += "<" + elem.nodeName;
for (i=attrs.length-1; i>=0; i--) {
attr = attrs.item(i);
if (attr.nodeValue != "") {
out += " " + attr.nodeName + "=\"" + attr.nodeValue+ "\"";
}
}
if (elem.hasChildNodes()) {
out += ">";
indent++;
var bOneLine = false;
for (i=0; i<childs.length; i++)
{
if (childs.item(i).nodeType == 1) { // element node
out += "\n" + svgToString(childs.item(i), indent);
} else if (childs.item(i).nodeType == 3) { // text node
bOneLine = true;
out += childs.item(i).nodeValue + "";
}
}
indent--;
if (!bOneLine) {
out += "\n";
for (i=0; i<indent; i++) out += " ";
}
out += "</" + elem.nodeName + ">";
} else {
out += "/>";
}
}
return out;
} // end svgToString()
function recalculateSelectedDimensions() {
var box = selected.getBBox();
// 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;
}
// after this point, we have some change
var remapx = function(x) {return ((x-box.x)/box.width)*selectedBBox.width + selectedBBox.x;}
var remapy = function(y) {return ((y-box.y)/box.height)*selectedBBox.height + selectedBBox.y;}
var scalew = function(w) {return w*selectedBBox.width/box.width;}
var scaleh = function(h) {return h*selectedBBox.height/box.height;}
var changes = {};
selected.removeAttribute("transform");
switch (selected.tagName)
{
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);
for (var i = 1; i < selected.pathSegList.numberOfItems; ++i) {
var l = selected.pathSegList.getItem(i);
var x = l.x, y = l.y;
// webkit browsers normalize things and this becomes an absolute
// line segment! we need to turn this back into a rel line segment
// see https://bugs.webkit.org/show_bug.cgi?id=26487
if (l.pathSegType == 4) {
x -= curx;
y -= cury;
curx += x;
cury += y;
}
// we only need to scale the relative coordinates (no need to translate)
newd += " l" + scalew(x) + "," + scaleh(y);
}
selected.setAttributeNS(null, "d", newd);
break;
case "line":
changes["x1"] = selected.x1.baseVal.value;
changes["y1"] = selected.y1.baseVal.value;
changes["x2"] = selected.x2.baseVal.value;
changes["y2"] = selected.y2.baseVal.value;
selected.x1.baseVal.value = remapx(selected.x1.baseVal.value);
selected.y1.baseVal.value = remapy(selected.y1.baseVal.value);
selected.x2.baseVal.value = remapx(selected.x2.baseVal.value);
selected.y2.baseVal.value = remapy(selected.y2.baseVal.value);
break;
case "circle":
changes["cx"] = selected.cx.baseVal.value;
changes["cy"] = selected.cy.baseVal.value;
changes["r"] = selected.r.baseVal.value;
selected.cx.baseVal.value = remapx(selected.cx.baseVal.value);
selected.cy.baseVal.value = remapy(selected.cy.baseVal.value);
// take the minimum of the new selected box's dimensions for the new circle radius
selected.r.baseVal.value = Math.min(selectedBBox.width/2,selectedBBox.height/2);
break;
case "ellipse":
changes["cx"] = selected.cx.baseVal.value;
changes["cy"] = selected.cy.baseVal.value;
changes["rx"] = selected.rx.baseVal.value;
changes["ry"] = selected.ry.baseVal.value;
selected.cx.baseVal.value = remapx(selected.cx.baseVal.value);
selected.cy.baseVal.value = remapy(selected.cy.baseVal.value);
selected.rx.baseVal.value = scalew(selected.rx.baseVal.value);
selected.ry.baseVal.value = scaleh(selected.ry.baseVal.value);
break;
case "text":
// cannot use x.baseVal.value here because x is a SVGLengthList
changes["x"] = selected.getAttribute("x");
changes["y"] = selected.getAttribute("y");
selected.setAttribute("x", remapx(selected.getAttribute("x")));
selected.setAttribute("y", remapy(selected.getAttribute("y")));
break;
case "rect":
changes["x"] = selected.x.baseVal.value;
changes["y"] = selected.y.baseVal.value;
changes["width"] = selected.width.baseVal.value;
changes["height"] = selected.height.baseVal.value;
selected.x.baseVal.value = remapx(selected.x.baseVal.value);
selected.y.baseVal.value = remapy(selected.y.baseVal.value);
selected.width.baseVal.value = scalew(selected.width.baseVal.value);
selected.height.baseVal.value = scaleh(selected.height.baseVal.value);
break;
default: // rect
console.log("Unknown shape type: " + selected.tagName);
break;
}
// fire changed event
if (changes) {
var text = (current_resize_mode == "none" ? "position" : "size");
addCommandToHistory(new ChangeElementCommand(selected, changes, text));
}
call("changed", selected);
}
var recalculateSelectedOutline = function() {
if (selected != null && theSelector != null) {
theSelector.resize(selectedBBox);
}
}
// public events
// call this function to set the selected element
// call this function with null to clear the selected element
var selectElement = function(newSelected)
{
if (selected == newSelected) return;
// remove selected outline from previously selected element
if (theSelector != null) {
selectorManager.releaseSelector(theSelector);
}
selected = newSelected;
if (selected != null) {
selectedBBox = selected.getBBox();
// the manager gives us a selector
theSelector = selectorManager.requestSelector(selected);
// recalculate size and then re-append to bottom of document
recalculateSelectedOutline();
// set all our current styles to the selected styles
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");
}
// do not show resize grips on text elements
theSelector.showGrips(selected.tagName != "text");
}
call("selected", selected);
}
// in mouseDown :
// - when we are in a create mode, the element is added to the canvas
// but the action is not recorded until mouseUp
// - 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>
if (t.nodeName.toLowerCase() == "div" || t.nodeName.toLowerCase() == "svg") {
t = null;
}
selectElement(t);
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 = "M" + x + "," + y + " ";
addSvgElementFromJson({
"element": "path",
"attr": {
"d": d_attr,
"id": getId(),
"fill": "none",
"stroke": current_stroke,
"stroke-width": current_stroke_width,
"stroke-dasharray": current_stroke_style,
"stroke-opacity": current_stroke_opacity,
"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": getId(),
"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": getId(),
"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": getId(),
"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": getId(),
"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": getId(),
"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;
}
}
// in mouseMove 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)
var mouseMove = 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;
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 mouseUp and the element is relocated to the
// new location
if (selected != null && theSelector != null) {
var dx = x - start_x;
var dy = y - start_y;
selectedBBox = selected.getBBox();
selectedBBox.x += dx;
selectedBBox.y += dy;
var ts = "translate(" + dx + "," + dy + ")";
selected.setAttribute("transform", ts);
recalculateSelectedOutline();
}
break;
case "resize":
// 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=selected.getBBox(), 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;
}
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;
}
ts = "translate(" + (left+tx) + "," + (top+ty) + ") scale(" + (sx) + "," + (sy) +
") translate(" + (-left) + "," + (-top) + ")";
selected.setAttribute("transform", ts);
recalculateSelectedOutline();
break;
case "text":
shape.setAttribute("x", x);
shape.setAttribute("y", y);
break;
case "line":
shape.setAttributeNS(null, "x2", x);
shape.setAttributeNS(null, "y2", y);
break;
case "square":
var size = Math.max( Math.abs(x - start_x), Math.abs(y - start_y) );
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);
break;
// case "select":
case "rect":
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));
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");
shape.setAttributeNS(null, "rx", Math.abs(x - cx) );
shape.setAttributeNS(null, "ry", Math.abs(y - cy) );
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 += "l" + dx + "," + dy + " ";
shape.setAttributeNS(null, "d", d_attr);
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
// fire changed event
// call("changed", selected);
}
// in mouseUp, this is where the command is stored for later undo:
// - 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 recalculateSelectedDimensions()
var mouseUp = function(evt)
{
if (!started) return;
started = false;
var element = svgdoc.getElementById(getId());
var keep = false;
switch (current_mode)
{
// fall-through to select here
case "resize":
current_mode = "select";
case "select":
if (selected != null) {
recalculateSelectedDimensions();
recalculateSelectedOutline();
// 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;
selectElement(element);
break;
}
d_attr = null;
obj_num++;
if (!keep && element != null) {
element.parentNode.removeChild(element);
element = null;
} else if (element != null) {
element.setAttribute("opacity", current_opacity);
cleanupElement(element);
// 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.selectNone();
var str = "<?xml version=\"1.0\" standalone=\"no\"?>\n";
// see http://jwatt.org/svg/authoring/#doctype-declaration
// str += "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n";
str += svgToString(svgroot, 0);
this.saveHandler(str);
}
this.clear = function() {
var nodes = svgroot.childNodes;
var len = svgroot.childNodes.length;
var i = 0;
this.selectNone();
for(var rep = 0; rep < len; rep++){
if (nodes[i].nodeType == 1) { // element node
nodes[i].parentNode.removeChild(nodes[i]);
} else {
i++;
}
}
call("cleared");
}
this.setResolution = function(x, y) {
var w = svgroot.getAttribute("width"),
h = svgroot.getAttribute("height");
svgroot.setAttribute("width", x);
svgroot.setAttribute("height", y);
addCommandToHistory(new ChangeElementCommand(svgroot, {"width":w,"height":h}, "resolution"));
call("changed", svgroot);
}
this.getMode = function() {
return current_mode;
}
this.setMode = function(name) {
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;
this.changeSelectedAttribute("fill", val);
}
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.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;
}
this.each = function(cb) {
$(svgroot).children().each(cb);
}
this.bind = function(event, f) {
events[event] = f;
}
this.setIdPrefix = function(p) {
idprefix = p;
}
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() {
if (selected == null) { return ""; }
return selected.textContent;
}
this.setTextContent = function(val) {
this.changeSelectedAttribute("#text", val);
}
this.setRectRadius = function(val) {
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);
}
}
}
this.changeSelectedAttribute = function(attr, val) {
if (selected != null) {
var oldval = (attr == "#text" ? selected.textContent : selected.getAttribute(attr));
if (oldval != val) {
if (attr == "#text") selected.textContent = val;
else selected.setAttribute(attr, val);
selectedBBox = selected.getBBox();
recalculateSelectedOutline();
var changes = {};
changes[attr] = oldval;
addCommandToHistory(new ChangeElementCommand(selected, changes, attr));
call("changed", selected);
}
}
}
$(container).mouseup(mouseUp);
$(container).mousedown(mouseDown);
$(container).mousemove(mouseMove);
this.saveHandler = function(svg) {
window.open("data:image/svg+xml;base64," + Utils.encode64(svg));
}
this.selectNone = function() {
selectElement(null);
}
this.deleteSelectedElement = function() {
if (selected != null) {
var parent = selected.parentNode;
var t = selected;
// this will unselect the element (and remove the selectedOutline)
selectElement(null);
var elem = parent.removeChild(t);
addCommandToHistory(new RemoveElementCommand(elem, parent));
}
}
this.moveToTopSelectedElement = function() {
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() {
if (selected != null) {
var t = selected;
var oldParent = t.parentNode;
var oldNextSibling = t.nextSibling;
if (oldNextSibling == selectorManager.selectorParentGroup) oldNextSibling = null;
t = t.parentNode.insertBefore(t, t.parentNode.firstChild);
addCommandToHistory(new MoveElementCommand(t, oldNextSibling, oldParent, "bottom"));
}
}
this.moveSelectedElement = function(dx,dy) {
if (selected != null) {
selectedBBox = selected.getBBox();
selectedBBox.x += dx;
selectedBBox.y += dy;
recalculateSelectedDimensions();
recalculateSelectedOutline();
}
}
this.getUndoStackSize = function() { return undoStackPointer; }
this.getRedoStackSize = function() { return undoStack.length - undoStackPointer; }
this.undo = function() {
if (undoStackPointer > 0) {
this.selectNone();
var cmd = undoStack[--undoStackPointer];
cmd.unapply();
call("changed", cmd.elem);
}
// console.log("after undo, stackPointer=" + undoStackPointer);
// console.log(undoStack);
}
this.redo = function() {
if (undoStackPointer < undoStack.length && undoStack.length > 0) {
this.selectNone();
var cmd = undoStack[undoStackPointer++];
cmd.apply();
call("changed", cmd.elem);
}
// console.log("after redo, stackPointer=" + undoStackPointer);
// console.log(undoStack);
}
}
// 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('');
}
}