var SHAPE = "svgShape",
Y_LANG = Y.Lang,
AttributeLite = Y.AttributeLite,
SVGGraphic,
SVGShape,
SVGCircle,
SVGRect,
SVGPath,
SVGEllipse,
SVGPieSlice,
DOCUMENT = Y.config.doc;
function SVGDrawing(){}
/**
* <a href="http://www.w3.org/TR/SVG/">SVG</a> implementation of the <a href="Drawing.html">`Drawing`</a> class.
* `SVGDrawing` is not intended to be used directly. Instead, use the <a href="Drawing.html">`Drawing`</a> class.
* If the browser has <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities, the <a href="Drawing.html">`Drawing`</a>
* class will point to the `SVGDrawing` class.
*
* @module graphics
* @class SVGDrawing
* @constructor
*/
SVGDrawing.prototype = {
/**
* Indicates the type of shape
*
* @private
* @property _type
* @readOnly
* @type String
*/
_type: "path",
/**
* Draws a bezier curve.
*
* @method curveTo
* @param {Number} cp1x x-coordinate for the first control point.
* @param {Number} cp1y y-coordinate for the first control point.
* @param {Number} cp2x x-coordinate for the second control point.
* @param {Number} cp2y y-coordinate for the second control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
*/
curveTo: function(cp1x, cp1y, cp2x, cp2y, x, y) {
var pathArrayLen,
currentArray,
hiX,
loX,
hiY,
loY;
if(this._pathType !== "C")
{
this._pathType = "C";
currentArray = ["C"];
this._pathArray.push(currentArray);
}
else
{
currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
if(!currentArray)
{
currentArray = [];
this._pathArray.push(currentArray);
}
}
pathArrayLen = this._pathArray.length - 1;
this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat([Math.round(cp1x), Math.round(cp1y), Math.round(cp2x) , Math.round(cp2y), x, y]);
hiX = Math.max(x, Math.max(cp1x, cp2x));
hiY = Math.max(y, Math.max(cp1y, cp2y));
loX = Math.min(x, Math.min(cp1x, cp2x));
loY = Math.min(y, Math.min(cp1y, cp2y));
this._trackSize(hiX, hiY);
this._trackSize(loX, loY);
},
/**
* Draws a quadratic bezier curve.
*
* @method quadraticCurveTo
* @param {Number} cpx x-coordinate for the control point.
* @param {Number} cpy y-coordinate for the control point.
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
*/
quadraticCurveTo: function(cpx, cpy, x, y) {
var pathArrayLen,
currentArray,
hiX,
loX,
hiY,
loY;
if(this._pathType !== "Q")
{
this._pathType = "Q";
currentArray = ["Q"];
this._pathArray.push(currentArray);
}
else
{
currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
if(!currentArray)
{
currentArray = [];
this._pathArray.push(currentArray);
}
}
pathArrayLen = this._pathArray.length - 1;
this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat([Math.round(cpx), Math.round(cpy), Math.round(x), Math.round(y)]);
hiX = Math.max(x, cpx);
hiY = Math.max(y, cpy);
loX = Math.min(x, cpx);
loY = Math.min(y, cpy);
this._trackSize(hiX, hiY);
this._trackSize(loX, loY);
},
/**
* Draws a rectangle.
*
* @method drawRect
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
*/
drawRect: function(x, y, w, h) {
this.moveTo(x, y);
this.lineTo(x + w, y);
this.lineTo(x + w, y + h);
this.lineTo(x, y + h);
this.lineTo(x, y);
},
/**
* Draws a rectangle with rounded corners.
*
* @method drawRect
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
* @param {Number} ew width of the ellipse used to draw the rounded corners
* @param {Number} eh height of the ellipse used to draw the rounded corners
*/
drawRoundRect: function(x, y, w, h, ew, eh) {
this.moveTo(x, y + eh);
this.lineTo(x, y + h - eh);
this.quadraticCurveTo(x, y + h, x + ew, y + h);
this.lineTo(x + w - ew, y + h);
this.quadraticCurveTo(x + w, y + h, x + w, y + h - eh);
this.lineTo(x + w, y + eh);
this.quadraticCurveTo(x + w, y, x + w - ew, y);
this.lineTo(x + ew, y);
this.quadraticCurveTo(x, y, x, y + eh);
},
/**
* Draws a circle.
*
* @method drawCircle
* @param {Number} x y-coordinate
* @param {Number} y x-coordinate
* @param {Number} r radius
* @protected
*/
drawCircle: function(x, y, radius) {
var circum = radius * 2;
this._drawingComplete = false;
this._trackSize(x, y);
this._trackSize(x + circum, y + circum);
this._pathArray = this._pathArray || [];
this._pathArray.push(["M", x + radius, y]);
this._pathArray.push(["A", radius, radius, 0, 1, 0, x + radius, y + circum]);
this._pathArray.push(["A", radius, radius, 0, 1, 0, x + radius, y]);
return this;
},
/**
* Draws an ellipse.
*
* @method drawEllipse
* @param {Number} x x-coordinate
* @param {Number} y y-coordinate
* @param {Number} w width
* @param {Number} h height
* @protected
*/
drawEllipse: function(x, y, w, h) {
var radius = w * 0.5,
yRadius = h * 0.5;
this._drawingComplete = false;
this._trackSize(x, y);
this._trackSize(x + w, y + h);
this._pathArray = this._pathArray || [];
this._pathArray.push(["M", x + radius, y]);
this._pathArray.push(["A", radius, yRadius, 0, 1, 0, x + radius, y + h]);
this._pathArray.push(["A", radius, yRadius, 0, 1, 0, x + radius, y]);
return this;
},
/**
* Draws a diamond.
*
* @method drawDiamond
* @param {Number} x y-coordinate
* @param {Number} y x-coordinate
* @param {Number} width width
* @param {Number} height height
* @protected
*/
drawDiamond: function(x, y, width, height)
{
var midWidth = width * 0.5,
midHeight = height * 0.5;
this.moveTo(x + midWidth, y);
this.lineTo(x + width, y + midHeight);
this.lineTo(x + midWidth, y + height);
this.lineTo(x, y + midHeight);
this.lineTo(x + midWidth, y);
return this;
},
/**
* Draws a wedge.
*
* @method drawWedge
* @param {Number} x x-coordinate of the wedge's center point
* @param {Number} y y-coordinate of the wedge's center point
* @param {Number} startAngle starting angle in degrees
* @param {Number} arc sweep of the wedge. Negative values draw clockwise.
* @param {Number} radius radius of wedge. If [optional] yRadius is defined, then radius is the x radius.
* @param {Number} yRadius [optional] y radius for wedge.
* @private
*/
drawWedge: function(x, y, startAngle, arc, radius, yRadius)
{
var segs,
segAngle,
theta,
angle,
angleMid,
ax,
ay,
bx,
by,
cx,
cy,
i = 0,
diameter = radius * 2,
currentArray,
pathArrayLen;
yRadius = yRadius || radius;
if(this._pathType != "M")
{
this._pathType = "M";
currentArray = ["M"];
this._pathArray.push(currentArray);
}
else
{
currentArray = this._getCurrentArray();
}
pathArrayLen = this._pathArray.length - 1;
this._pathArray[pathArrayLen].push(x);
this._pathArray[pathArrayLen].push(x);
// limit sweep to reasonable numbers
if(Math.abs(arc) > 360)
{
arc = 360;
}
// First we calculate how many segments are needed
// for a smooth arc.
segs = Math.ceil(Math.abs(arc) / 45);
// Now calculate the sweep of each segment.
segAngle = arc / segs;
// The math requires radians rather than degrees. To convert from degrees
// use the formula (degrees/180)*Math.PI to get radians.
theta = -(segAngle / 180) * Math.PI;
// convert angle startAngle to radians
angle = (startAngle / 180) * Math.PI;
if(segs > 0)
{
// draw a line from the center to the start of the curve
ax = x + Math.cos(startAngle / 180 * Math.PI) * radius;
ay = y + Math.sin(startAngle / 180 * Math.PI) * yRadius;
this._pathType = "L";
pathArrayLen++;
this._pathArray[pathArrayLen] = ["L"];
this._pathArray[pathArrayLen].push(Math.round(ax));
this._pathArray[pathArrayLen].push(Math.round(ay));
pathArrayLen++;
this._pathType = "Q";
this._pathArray[pathArrayLen] = ["Q"];
for(; i < segs; ++i)
{
angle += theta;
angleMid = angle - (theta / 2);
bx = x + Math.cos(angle) * radius;
by = y + Math.sin(angle) * yRadius;
cx = x + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
cy = y + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
this._pathArray[pathArrayLen].push(Math.round(cx));
this._pathArray[pathArrayLen].push(Math.round(cy));
this._pathArray[pathArrayLen].push(Math.round(bx));
this._pathArray[pathArrayLen].push(Math.round(by));
}
}
this._trackSize(diameter, diameter);
return this;
},
/**
* Draws a line segment using the current line style from the current drawing position to the specified x and y coordinates.
*
* @method lineTo
* @param {Number} point1 x-coordinate for the end point.
* @param {Number} point2 y-coordinate for the end point.
*/
lineTo: function(point1, point2, etc) {
var args = arguments,
i,
len,
pathArrayLen,
currentArray;
this._pathArray = this._pathArray || [];
if (typeof point1 === 'string' || typeof point1 === 'number') {
args = [[point1, point2]];
}
len = args.length;
this._shapeType = "path";
if(this._pathType !== "L")
{
this._pathType = "L";
currentArray = ['L'];
this._pathArray.push(currentArray);
}
else
{
currentArray = this._getCurrentArray();
}
pathArrayLen = this._pathArray.length - 1;
for (i = 0; i < len; ++i) {
this._pathArray[pathArrayLen].push(args[i][0]);
this._pathArray[pathArrayLen].push(args[i][1]);
this._trackSize.apply(this, args[i]);
}
},
_getCurrentArray: function()
{
var currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
if(!currentArray)
{
currentArray = [];
this._pathArray.push(currentArray);
}
return currentArray;
},
/**
* Moves the current drawing position to specified x and y coordinates.
*
* @method moveTo
* @param {Number} x x-coordinate for the end point.
* @param {Number} y y-coordinate for the end point.
*/
moveTo: function(x, y) {
var pathArrayLen,
currentArray;
this._pathArray = this._pathArray || [];
this._pathType = "M";
currentArray = ["M"];
this._pathArray.push(currentArray);
pathArrayLen = this._pathArray.length - 1;
this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat([x, y]);
this._trackSize(x, y);
},
/**
* Completes a drawing operation.
*
* @method end
*/
end: function()
{
this._closePath();
this._graphic.addToRedrawQueue(this);
},
/**
* Clears the path.
*
* @method clear
*/
clear: function()
{
this._width = 0;
this._height = 0;
this._left = 0;
this._right = 0;
this._top = 0;
this._bottom = 0;
this._pathArray = [];
this._path = "";
},
/**
* Draws the path.
*
* @method _closePath
* @private
*/
_closePath: function()
{
var pathArray,
segmentArray,
pathType,
len,
val,
val2,
i,
path = "",
node = this.node,
left = this._left,
top = this._top,
fill = this.get("fill");
if(this._pathArray)
{
pathArray = this._pathArray.concat();
while(pathArray && pathArray.length > 0)
{
segmentArray = pathArray.shift();
len = segmentArray.length;
pathType = segmentArray[0];
if(pathType === "A")
{
path += pathType + segmentArray[1] + "," + segmentArray[2];
}
else if(pathType != "z")
{
path += " " + pathType + (segmentArray[1] - left);
}
else
{
path += " z ";
}
switch(pathType)
{
case "L" :
case "M" :
case "Q" :
for(i = 2; i < len; ++i)
{
val = (i % 2 === 0) ? top : left;
val = segmentArray[i] - val;
path += ", " + val;
}
break;
case "A" :
val = " " + segmentArray[3] + " " + segmentArray[4];
val += "," + segmentArray[5] + " " + (segmentArray[6] - left);
val += "," + (segmentArray[7] - top);
path += " " + val;
break;
case "C" :
for(i = 2; i < len; ++i)
{
val = (i % 2 === 0) ? top : left;
val2 = segmentArray[i];
val2 -= val;
path += " " + val2;
}
break;
}
}
if(fill && fill.color)
{
path += 'z';
}
if(path)
{
node.setAttribute("d", path);
}
this._path = path;
this._fillChangeHandler();
this._strokeChangeHandler();
this._updateTransform();
}
},
/**
* Ends a fill and stroke
*
* @method closePath
*/
closePath: function()
{
this._pathArray.push(["z"]);
},
/**
* Updates the size of the graphics object
*
* @method _trackSize
* @param {Number} w width
* @param {Number} h height
* @private
*/
_trackSize: function(w, h) {
if (w > this._right) {
this._right = w;
}
if(w < this._left)
{
this._left = w;
}
if (h < this._top)
{
this._top = h;
}
if (h > this._bottom)
{
this._bottom = h;
}
this._width = this._right - this._left;
this._height = this._bottom - this._top;
}
};
Y.SVGDrawing = SVGDrawing;
