/*
* Shape
* Visit http://createjs.com/ for documentation, updates and examples.
*
* Copyright (c) 2010 gskinner.com, inc.
* 
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
* 
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/

// namespace:
this.createjs = this.createjs||{};

(function() {

/**
 * A Shape allows you to display vector art in the display list. It composites a {{#crossLink "Graphics"}}{{/crossLink}}
 * instance which exposes all of the vector drawing methods. The Graphics instance can be shared between multiple Shape
 * instances to display the same vector graphics with different positions or transforms.
 *
 * If the vector art will not
 * change between draws, you may want to use the {{#crossLink "DisplayObject/cache"}}{{/crossLink}} method to reduce the
 * rendering cost.
 *
 * <h4>Example</h4>
 *      var graphics = new createjs.Graphics().beginFill("#ff0000").drawRect(0, 0, 100, 100);
 *      var shape = new createjs.Shape(graphics);
 *      
 *      //Alternatively use can also use the graphics property of the Shape class to renderer the same as above.
 *      var shape = new createjs.Shape();
 *      shape.graphics.beginFill("#ff0000").drawRect(0, 0, 100, 100);
 *
 * @class Shape
 * @extends DisplayObject
 * @constructor
 * @param {Graphics} graphics Optional. The graphics instance to display. If null, a new Graphics instance will be created.
 **/
var Shape = function(graphics) {
  this.initialize(graphics);
}
var p = Shape.prototype = new createjs.DisplayObject();

// public properties:
	/**
	 * The graphics instance to display.
	 * @property graphics
	 * @type Graphics
	 **/
	p.graphics = null;
	
// constructor:
	/**
	 * @property DisplayObject_initialize
	 * @private
	 * @type Function
	 **/
	p.DisplayObject_initialize = p.initialize;

	/** 
	 * Initialization method.
	 * @method initialize
	 * @param {Graphics} graphics
	 * @protected
	 **/
	p.initialize = function(graphics) {
		this.DisplayObject_initialize();
		this.graphics = graphics ? graphics : new createjs.Graphics();
	}

	/**
	 * Returns true or false indicating whether the Shape would be visible if drawn to a canvas.
	 * This does not account for whether it would be visible within the boundaries of the stage.
	 * NOTE: This method is mainly for internal use, though it may be useful for advanced uses.
	 * @method isVisible
	 * @return {Boolean} Boolean indicating whether the Shape would be visible if drawn to a canvas
	 **/
	p.isVisible = function() {
		var hasContent = this.cacheCanvas || (this.graphics && !this.graphics.isEmpty());
		return !!(this.visible && this.alpha > 0 && this.scaleX != 0 && this.scaleY != 0 && hasContent);
	};

	/**
	 * @property DisplayObject_draw
	 * @private
	 * @type Function
	 **/
	p.DisplayObject_draw = p.draw;
	
	/**
	 * Draws the Shape into the specified context ignoring it's visible, alpha, shadow, and transform. Returns true if
	 * the draw was handled (useful for overriding functionality).
	 *
	 * <i>NOTE: This method is mainly for internal use, though it may be useful for advanced uses.</i>
	 * @method draw
	 * @param {CanvasRenderingContext2D} ctx The canvas 2D context object to draw into.
	 * @param {Boolean} ignoreCache Indicates whether the draw operation should ignore any current cache. For example,
	 * used for drawing the cache (to prevent it from simply drawing an existing cache back into itself).
	 **/
	p.draw = function(ctx, ignoreCache) {
		if (this.DisplayObject_draw(ctx, ignoreCache)) { return true; }
		this.graphics.draw(ctx);
		return true;
	}
	
	/**
	 * Returns a clone of this Shape. Some properties that are specific to this instance's current context are reverted to 
	 * their defaults (for example .parent).
	 * @method clone
	 * @param {Boolean} recursive If true, this Shape's {{#crossLink "Graphics"}}{{/crossLink}} instance will also be
	 * cloned. If false, the Graphics instance will be shared with the new Shape.
	 **/
	p.clone = function(recursive) {
		var o = new Shape((recursive && this.graphics) ? this.graphics.clone() : this.graphics);
		this.cloneProps(o);
		return o;
	}
		
	/**
	 * Returns a string representation of this object.
	 * @method toString
	 * @return {String} a string representation of the instance.
	 **/
	p.toString = function() {
		return "[Shape (name="+  this.name +")]";
	}

createjs.Shape = Shape;
}());