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/*
        Copyright (c) 2004-2006, The Dojo Foundation
        All Rights Reserved.

        Licensed under the Academic Free License version 2.1 or above OR the
        modified BSD license. For more information on Dojo licensing, see:

                http://dojotoolkit.org/community/licensing.shtml
*/



dojo.provide("dojo.gfx.svg");
dojo.require("dojo.lang.declare");
dojo.require("dojo.svg");
dojo.require("dojo.gfx.color");
dojo.require("dojo.gfx.common");
dojo.require("dojo.gfx.shape");
dojo.require("dojo.gfx.path");
dojo.require("dojo.experimental");
dojo.experimental("dojo.gfx.svg");
dojo.gfx.svg.getRef = function (fill) {
        if (!fill || fill == "none") {
                return null;
        }
        if (fill.match(/^url\(#.+\)$/)) {
                return dojo.byId(fill.slice(5, -1));
        }
        if (dojo.render.html.opera && fill.match(/^#dj_unique_.+$/)) {
                return dojo.byId(fill.slice(1));
        }
        return null;
};
dojo.lang.extend(dojo.gfx.Shape, {setFill:function (fill) {
        if (!fill) {
                this.fillStyle = null;
                this.rawNode.setAttribute("fill", "none");
                this.rawNode.setAttribute("fill-opacity", 0);
                return this;
        }
        if (typeof (fill) == "object" && "type" in fill) {
                switch (fill.type) {
                  case "linear":
                        var f = dojo.gfx.makeParameters(dojo.gfx.defaultLinearGradient, fill);
                        var gradient = this._setFillObject(f, "linearGradient");
                        dojo.lang.forEach(["x1", "y1", "x2", "y2"], function (x) {
                                gradient.setAttribute(x, f[x].toFixed(8));
                        });
                        break;
                  case "radial":
                        var f = dojo.gfx.makeParameters(dojo.gfx.defaultRadialGradient, fill);
                        var gradient = this._setFillObject(f, "radialGradient");
                        dojo.lang.forEach(["cx", "cy", "r"], function (x) {
                                gradient.setAttribute(x, f[x].toFixed(8));
                        });
                        break;
                  case "pattern":
                        var f = dojo.gfx.makeParameters(dojo.gfx.defaultPattern, fill);
                        var pattern = this._setFillObject(f, "pattern");
                        dojo.lang.forEach(["x", "y", "width", "height"], function (x) {
                                pattern.setAttribute(x, f[x].toFixed(8));
                        });
                        break;
                }
                return this;
        }
        var f = dojo.gfx.normalizeColor(fill);
        this.fillStyle = f;
        this.rawNode.setAttribute("fill", f.toCss());
        this.rawNode.setAttribute("fill-opacity", f.a);
        return this;
}, setStroke:function (stroke) {
        if (!stroke) {
                this.strokeStyle = null;
                this.rawNode.setAttribute("stroke", "none");
                this.rawNode.setAttribute("stroke-opacity", 0);
                return this;
        }
        this.strokeStyle = dojo.gfx.makeParameters(dojo.gfx.defaultStroke, stroke);
        this.strokeStyle.color = dojo.gfx.normalizeColor(this.strokeStyle.color);
        var s = this.strokeStyle;
        var rn = this.rawNode;
        if (s) {
                rn.setAttribute("stroke", s.color.toCss());
                rn.setAttribute("stroke-opacity", s.color.a);
                rn.setAttribute("stroke-width", s.width);
                rn.setAttribute("stroke-linecap", s.cap);
                if (typeof (s.join) == "number") {
                        rn.setAttribute("stroke-linejoin", "miter");
                        rn.setAttribute("stroke-miterlimit", s.join);
                } else {
                        rn.setAttribute("stroke-linejoin", s.join);
                }
        }
        return this;
}, _setFillObject:function (f, nodeType) {
        var def_elems = this.rawNode.parentNode.getElementsByTagName("defs");
        if (def_elems.length == 0) {
                return this;
        }
        this.fillStyle = f;
        var defs = def_elems[0];
        var fill = this.rawNode.getAttribute("fill");
        var ref = dojo.gfx.svg.getRef(fill);
        if (ref) {
                fill = ref;
                if (fill.tagName.toLowerCase() != nodeType.toLowerCase()) {
                        var id = fill.id;
                        fill.parentNode.removeChild(fill);
                        fill = document.createElementNS(dojo.svg.xmlns.svg, nodeType);
                        fill.setAttribute("id", id);
                        defs.appendChild(fill);
                } else {
                        while (fill.childNodes.length) {
                                fill.removeChild(fill.lastChild);
                        }
                }
        } else {
                fill = document.createElementNS(dojo.svg.xmlns.svg, nodeType);
                fill.setAttribute("id", dojo.dom.getUniqueId());
                defs.appendChild(fill);
        }
        if (nodeType == "pattern") {
                fill.setAttribute("patternUnits", "userSpaceOnUse");
                var img = document.createElementNS(dojo.svg.xmlns.svg, "image");
                img.setAttribute("x", 0);
                img.setAttribute("y", 0);
                img.setAttribute("width", f.width.toFixed(8));
                img.setAttribute("height", f.height.toFixed(8));
                img.setAttributeNS(dojo.svg.xmlns.xlink, "href", f.src);
                fill.appendChild(img);
        } else {
                fill.setAttribute("gradientUnits", "userSpaceOnUse");
                for (var i = 0; i < f.colors.length; ++i) {
                        f.colors[i].color = dojo.gfx.normalizeColor(f.colors[i].color);
                        var t = document.createElementNS(dojo.svg.xmlns.svg, "stop");
                        t.setAttribute("offset", f.colors[i].offset.toFixed(8));
                        t.setAttribute("stop-color", f.colors[i].color.toCss());
                        fill.appendChild(t);
                }
        }
        this.rawNode.setAttribute("fill", "url(#" + fill.getAttribute("id") + ")");
        this.rawNode.removeAttribute("fill-opacity");
        return fill;
}, _applyTransform:function () {
        var matrix = this._getRealMatrix();
        if (matrix) {
                var tm = this.matrix;
                this.rawNode.setAttribute("transform", "matrix(" + tm.xx.toFixed(8) + "," + tm.yx.toFixed(8) + "," + tm.xy.toFixed(8) + "," + tm.yy.toFixed(8) + "," + tm.dx.toFixed(8) + "," + tm.dy.toFixed(8) + ")");
        } else {
                this.rawNode.removeAttribute("transform");
        }
        return this;
}, setRawNode:function (rawNode) {
        with (rawNode) {
                setAttribute("fill", "none");
                setAttribute("fill-opacity", 0);
                setAttribute("stroke", "none");
                setAttribute("stroke-opacity", 0);
                setAttribute("stroke-width", 1);
                setAttribute("stroke-linecap", "butt");
                setAttribute("stroke-linejoin", "miter");
                setAttribute("stroke-miterlimit", 4);
        }
        this.rawNode = rawNode;
}, moveToFront:function () {
        this.rawNode.parentNode.appendChild(this.rawNode);
        return this;
}, moveToBack:function () {
        this.rawNode.parentNode.insertBefore(this.rawNode, this.rawNode.parentNode.firstChild);
        return this;
}, setShape:function (newShape) {
        this.shape = dojo.gfx.makeParameters(this.shape, newShape);
        for (var i in this.shape) {
                if (i != "type") {
                        this.rawNode.setAttribute(i, this.shape[i]);
                }
        }
        return this;
}, attachFill:function (rawNode) {
        var fillStyle = null;
        if (rawNode) {
                var fill = rawNode.getAttribute("fill");
                if (fill == "none") {
                        return;
                }
                var ref = dojo.gfx.svg.getRef(fill);
                if (ref) {
                        var gradient = ref;
                        switch (gradient.tagName.toLowerCase()) {
                          case "lineargradient":
                                fillStyle = this._getGradient(dojo.gfx.defaultLinearGradient, gradient);
                                dojo.lang.forEach(["x1", "y1", "x2", "y2"], function (x) {
                                        fillStyle[x] = gradient.getAttribute(x);
                                });
                                break;
                          case "radialgradient":
                                fillStyle = this._getGradient(dojo.gfx.defaultRadialGradient, gradient);
                                dojo.lang.forEach(["cx", "cy", "r"], function (x) {
                                        fillStyle[x] = gradient.getAttribute(x);
                                });
                                fillStyle.cx = gradient.getAttribute("cx");
                                fillStyle.cy = gradient.getAttribute("cy");
                                fillStyle.r = gradient.getAttribute("r");
                                break;
                          case "pattern":
                                fillStyle = dojo.lang.shallowCopy(dojo.gfx.defaultPattern, true);
                                dojo.lang.forEach(["x", "y", "width", "height"], function (x) {
                                        fillStyle[x] = gradient.getAttribute(x);
                                });
                                fillStyle.src = gradient.firstChild.getAttributeNS(dojo.svg.xmlns.xlink, "href");
                                break;
                        }
                } else {
                        fillStyle = new dojo.gfx.color.Color(fill);
                        var opacity = rawNode.getAttribute("fill-opacity");
                        if (opacity != null) {
                                fillStyle.a = opacity;
                        }
                }
        }
        return fillStyle;
}, _getGradient:function (defaultGradient, gradient) {
        var fillStyle = dojo.lang.shallowCopy(defaultGradient, true);
        fillStyle.colors = [];
        for (var i = 0; i < gradient.childNodes.length; ++i) {
                fillStyle.colors.push({offset:gradient.childNodes[i].getAttribute("offset"), color:new dojo.gfx.color.Color(gradient.childNodes[i].getAttribute("stop-color"))});
        }
        return fillStyle;
}, attachStroke:function (rawNode) {
        if (!rawNode) {
                return;
        }
        var stroke = rawNode.getAttribute("stroke");
        if (stroke == null || stroke == "none") {
                return null;
        }
        var strokeStyle = dojo.lang.shallowCopy(dojo.gfx.defaultStroke, true);
        var color = new dojo.gfx.color.Color(stroke);
        if (color) {
                strokeStyle.color = color;
                strokeStyle.color.a = rawNode.getAttribute("stroke-opacity");
                strokeStyle.width = rawNode.getAttribute("stroke-width");
                strokeStyle.cap = rawNode.getAttribute("stroke-linecap");
                strokeStyle.join = rawNode.getAttribute("stroke-linejoin");
                if (strokeStyle.join == "miter") {
                        strokeStyle.join = rawNode.getAttribute("stroke-miterlimit");
                }
        }
        return strokeStyle;
}, attachTransform:function (rawNode) {
        var matrix = null;
        if (rawNode) {
                matrix = rawNode.getAttribute("transform");
                if (matrix.match(/^matrix\(.+\)$/)) {
                        var t = matrix.slice(7, -1).split(",");
                        matrix = dojo.gfx.matrix.normalize({xx:parseFloat(t[0]), xy:parseFloat(t[2]), yx:parseFloat(t[1]), yy:parseFloat(t[3]), dx:parseFloat(t[4]), dy:parseFloat(t[5])});
                }
        }
        return matrix;
}, attachShape:function (rawNode) {
        var shape = null;
        if (rawNode) {
                shape = dojo.lang.shallowCopy(this.shape, true);
                for (var i in shape) {
                        shape[i] = rawNode.getAttribute(i);
                }
        }
        return shape;
}, attach:function (rawNode) {
        if (rawNode) {
                this.rawNode = rawNode;
                this.fillStyle = this.attachFill(rawNode);
                this.strokeStyle = this.attachStroke(rawNode);
                this.matrix = this.attachTransform(rawNode);
                this.shape = this.attachShape(rawNode);
        }
}});
dojo.declare("dojo.gfx.Group", dojo.gfx.Shape, {setRawNode:function (rawNode) {
        this.rawNode = rawNode;
}});
dojo.gfx.Group.nodeType = "g";
dojo.declare("dojo.gfx.Rect", dojo.gfx.shape.Rect, {attachShape:function (rawNode) {
        var shape = null;
        if (rawNode) {
                shape = dojo.gfx.Rect.superclass.attachShape.apply(this, arguments);
                shape.r = Math.min(rawNode.getAttribute("rx"), rawNode.getAttribute("ry"));
        }
        return shape;
}, setShape:function (newShape) {
        this.shape = dojo.gfx.makeParameters(this.shape, newShape);
        this.bbox = null;
        for (var i in this.shape) {
                if (i != "type" && i != "r") {
                        this.rawNode.setAttribute(i, this.shape[i]);
                }
        }
        this.rawNode.setAttribute("rx", this.shape.r);
        this.rawNode.setAttribute("ry", this.shape.r);
        return this;
}});
dojo.gfx.Rect.nodeType = "rect";
dojo.gfx.Ellipse = dojo.gfx.shape.Ellipse;
dojo.gfx.Ellipse.nodeType = "ellipse";
dojo.gfx.Circle = dojo.gfx.shape.Circle;
dojo.gfx.Circle.nodeType = "circle";
dojo.gfx.Line = dojo.gfx.shape.Line;
dojo.gfx.Line.nodeType = "line";
dojo.declare("dojo.gfx.Polyline", dojo.gfx.shape.Polyline, {setShape:function (points) {
        if (points && points instanceof Array) {
                this.shape = dojo.gfx.makeParameters(this.shape, {points:points});
                if (closed && this.shape.points.length) {
                        this.shape.points.push(this.shape.points[0]);
                }
        } else {
                this.shape = dojo.gfx.makeParameters(this.shape, points);
        }
        this.box = null;
        var attr = [];
        var p = this.shape.points;
        for (var i = 0; i < p.length; ++i) {
                attr.push(p[i].x.toFixed(8));
                attr.push(p[i].y.toFixed(8));
        }
        this.rawNode.setAttribute("points", attr.join(" "));
        return this;
}});
dojo.gfx.Polyline.nodeType = "polyline";
dojo.declare("dojo.gfx.Image", dojo.gfx.shape.Image, {setShape:function (newShape) {
        this.shape = dojo.gfx.makeParameters(this.shape, newShape);
        this.bbox = null;
        var rawNode = this.rawNode;
        for (var i in this.shape) {
                if (i != "type" && i != "src") {
                        rawNode.setAttribute(i, this.shape[i]);
                }
        }
        rawNode.setAttributeNS(dojo.svg.xmlns.xlink, "href", this.shape.src);
        return this;
}, setStroke:function () {
        return this;
}, setFill:function () {
        return this;
}, attachStroke:function (rawNode) {
        return null;
}, attachFill:function (rawNode) {
        return null;
}});
dojo.gfx.Image.nodeType = "image";
dojo.declare("dojo.gfx.Path", dojo.gfx.path.Path, {_updateWithSegment:function (segment) {
        dojo.gfx.Path.superclass._updateWithSegment.apply(this, arguments);
        if (typeof (this.shape.path) == "string") {
                this.rawNode.setAttribute("d", this.shape.path);
        }
}, setShape:function (newShape) {
        dojo.gfx.Path.superclass.setShape.apply(this, arguments);
        this.rawNode.setAttribute("d", this.shape.path);
        return this;
}});
dojo.gfx.Path.nodeType = "path";
dojo.gfx._creators = {createPath:function (path) {
        return this.createObject(dojo.gfx.Path, path);
}, createRect:function (rect) {
        return this.createObject(dojo.gfx.Rect, rect);
}, createCircle:function (circle) {
        return this.createObject(dojo.gfx.Circle, circle);
}, createEllipse:function (ellipse) {
        return this.createObject(dojo.gfx.Ellipse, ellipse);
}, createLine:function (line) {
        return this.createObject(dojo.gfx.Line, line);
}, createPolyline:function (points) {
        return this.createObject(dojo.gfx.Polyline, points);
}, createImage:function (image) {
        return this.createObject(dojo.gfx.Image, image);
}, createGroup:function () {
        return this.createObject(dojo.gfx.Group);
}, createObject:function (shapeType, rawShape) {
        if (!this.rawNode) {
                return null;
        }
        var shape = new shapeType();
        var node = document.createElementNS(dojo.svg.xmlns.svg, shapeType.nodeType);
        shape.setRawNode(node);
        this.rawNode.appendChild(node);
        shape.setShape(rawShape);
        this.add(shape);
        return shape;
}, add:function (shape) {
        var oldParent = shape.getParent();
        if (oldParent) {
                oldParent.remove(shape, true);
        }
        shape._setParent(this, null);
        this.rawNode.appendChild(shape.rawNode);
        return this;
}, remove:function (shape, silently) {
        if (this.rawNode == shape.rawNode.parentNode) {
                this.rawNode.removeChild(shape.rawNode);
        }
        shape._setParent(null, null);
        return this;
}};
dojo.gfx.attachNode = function (node) {
        if (!node) {
                return null;
        }
        var s = null;
        switch (node.tagName.toLowerCase()) {
          case dojo.gfx.Rect.nodeType:
                s = new dojo.gfx.Rect();
                break;
          case dojo.gfx.Ellipse.nodeType:
                s = new dojo.gfx.Ellipse();
                break;
          case dojo.gfx.Polyline.nodeType:
                s = new dojo.gfx.Polyline();
                break;
          case dojo.gfx.Path.nodeType:
                s = new dojo.gfx.Path();
                break;
          case dojo.gfx.Circle.nodeType:
                s = new dojo.gfx.Circle();
                break;
          case dojo.gfx.Line.nodeType:
                s = new dojo.gfx.Line();
                break;
          case dojo.gfx.Image.nodeType:
                s = new dojo.gfx.Image();
                break;
          default:
                dojo.debug("FATAL ERROR! tagName = " + node.tagName);
        }
        s.attach(node);
        return s;
};
dojo.lang.extend(dojo.gfx.Surface, {setDimensions:function (width, height) {
        if (!this.rawNode) {
                return this;
        }
        this.rawNode.setAttribute("width", width);
        this.rawNode.setAttribute("height", height);
        return this;
}, getDimensions:function () {
        return this.rawNode ? {width:this.rawNode.getAttribute("width"), height:this.rawNode.getAttribute("height")} : null;
}});
dojo.gfx.createSurface = function (parentNode, width, height) {
        var s = new dojo.gfx.Surface();
        s.rawNode = document.createElementNS(dojo.svg.xmlns.svg, "svg");
        s.rawNode.setAttribute("width", width);
        s.rawNode.setAttribute("height", height);
        var defs = new dojo.gfx.svg.Defines();
        var node = document.createElementNS(dojo.svg.xmlns.svg, dojo.gfx.svg.Defines.nodeType);
        defs.setRawNode(node);
        s.rawNode.appendChild(node);
        dojo.byId(parentNode).appendChild(s.rawNode);
        return s;
};
dojo.gfx.attachSurface = function (node) {
        var s = new dojo.gfx.Surface();
        s.rawNode = node;
        return s;
};
dojo.lang.extend(dojo.gfx.Group, dojo.gfx._creators);
dojo.lang.extend(dojo.gfx.Surface, dojo.gfx._creators);
delete dojo.gfx._creators;
dojo.gfx.svg.Defines = function () {
        this.rawNode = null;
};
dojo.lang.extend(dojo.gfx.svg.Defines, {setRawNode:function (rawNode) {
        this.rawNode = rawNode;
}});
dojo.gfx.svg.Defines.nodeType = "defs";