/*(You must include this commment)
 * Round Corners jQuery Plugin version - 1.0.1
 * written by Avinoam Henig
 * special thanks to Dan Blaisdell for help and mentoring (http://manifestwebdesign.com/)
 * 
 * for more information go to:
 * roundCorners.avinoam.info
 * or email me at: contact@avinoam.info
 * 
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Needed files:
 * jQuery 1.3 Core Javascirpt File
 * Explorer Canvas Release 2 Javascript File
 */
(function($){
var emFuncs = new Array();
$.fn.fontchange = function(func){
	emFuncs[emFuncs.length] = func;
	return this;
};
function checkEM(){
	var nLeft = $emEL.offset().left;
	if(nLeft!=oLeft){
		for(var func in emFuncs) emFuncs[func]();
	}
	oLeft = nLeft;
};
$(window).bind('load', function(){
	emFuncs = [];
	$emEL = $('<div></div>').css({
		'position' : 'absolute',
		'left' : '-100em',
		'width' : '0px',
		'height' : '0px',
		'background' : 'none',
		'border:' : 'none',
		'padding' : '0px',
		'margin' : '0px'
	}).prependTo('body');
	oLeft = $emEL.offset().left;
	$(window).keyup(function(){
		checkEM();
	});
});
$.fn._html = $.fn.html;
$.fn.html = function(val){
	$(this).each(function(){
		if(this.canvas) $('span.inner', this)._html(val);
		else $(this)._html(val);
	});
	return this;
};
$.fn._offset = $.fn.offset;
$.fn.offset = function(newXY){
	return newXY ? this.setXY(newXY) : this._offset();
};
$.fn.setXY = function(newXY){
	$(this).each(function(){
		var el = this;
		var hide = false;
		if($(el).css('display')=='none'){
			hide = true;
			$(el).show();
		};
        var style_pos = $(el).css('position');
        if (style_pos == 'static') {
        	$(el).css('position','relative');
            style_pos = 'relative';
        };
		var pageXY = $(el).offset();
		if(pageXY){
			var delta = {
				left : parseInt($(el).css('left')),
				top : parseInt($(el).css('top'))
			};
			if (isNaN(delta.left)) delta.left = (style_pos == 'relative') ? 0 : el.offsetLeft;
			if (isNaN(delta.top)) delta.top = (style_pos == 'relative') ? 0 : el.offsetTop;
			if (newXY.left || newXY.left===0) $(el).css('left',newXY.left - pageXY.left + delta.left + 'px');
			if (newXY.top || newXY.top===0) $(el).css('top',newXY.top - pageXY.top + delta.top + 'px');
		};
		if(hide) $(el).show();
	});
	return this;
};
$.fn._css = $.fn.css;
$.fn.css = function(one, two){
	var el = this;
	var theResult = el;
	if(arguments.length==1 && typeof one=='string'){
		var type, style, result = false;
		if(one.search(':')!=-1){
			type = one.split(':')[0].replace(' ', '');
			style = one.split(':')[1].replace(' ', '');
		} else{
			theResult = el._css(one, two);
		};
		if(type && style){
			var styleSplits = style.split('-');
			style = styleSplits[0];
			for(var s=1; s<styleSplits.length; s++){
				style += styleSplits[s].substring(0, 1).toUpperCase();
				style += styleSplits[s].substring(1, styleSplits[s].length);
			};
			var rules = el.getCSSRules(':'+type);
			result = el._css(style);
			if(type=='active'){
				var hoverRules = el.getCSSRules(':hover');
				for(var hr=0; hr<hoverRules.length; hr++){
					if(hoverRules[hr].style[style]) result = hoverRules[hr].style[style];
				}
			}
			if(result) for(var r=0; r<rules.length; r++) if(rules[r].style[style]) result = rules[r].style[style];
			theResult = result;
		} else theResult = el._css(one, two);
	} else theResult = this._css(one, two);
	return theResult;
};
$.fn.getCSSRules = function(type){
	var el = this;
	var elRules = new Array();
	if(type==null) type = '';
	for(var ss = 0; ss<document.styleSheets.length; ss++){
		if($.browser.msie) var rules = document.styleSheets[ss].rules;
		else var rules = document.styleSheets[ss].cssRules;
		for(var r=0; r<rules.length; r++){
			if(!rules[r].selectorText || rules[r].selectorText.search(type)==-1) continue;
			var sel = rules[r].selectorText.replace(':hover', '').replace(':active', '').replace(':focus', '');
			if ($(sel)) {
				$(sel).each(function(){
					if ($(this)[0] == $(el)[0]) {
						elRules[elRules.length] = rules[r];
					};
				});
			};
		};
	};
	return elRules;
};
$.fn.canvas = function(){
	$(this).each(function(){
		var el = this;
		if (el.canvas) return;
		var hide = false;
		if($(el).css('display')=='none'){
			hide = true;
			$(el).show();
		};
		var close = false;
		var funcName = 'insertBefore';
		if(el.tagName=='INPUT' || el.tagName=='TEXTAREA' || el.tagName=='IMG') close = true;
		if($.browser.opera) var tagDisplay = 'block';
		else var tagDisplay = 'inline';
		if(!close){
			$(el).wrapInner('<span style="display: '+tagDisplay+';position: relative; z-index: 1; background: none; border: none; margin: 0px; padding: 0px;" class="inner" />')
			.css('display', $(el).css('display'));
			if($.browser.safari) $('span.inner', el).children().css('position', 'relative');
			if($.browser.msie) funcName = 'appendTo';
			else funcName = 'prependTo';	
		};
		var canvas = $('<canvas></canvas>')[funcName](el).attr({
			'width': $(el).outerWidth(),
			'height': $(el).outerHeight()
		}).css({ 
			'position' : 'absolute',
			'background' : 'none',
			'border' : 'none', 
			'padding' : '0px'
		}).offset($(el).offset());
		if(close) $(el).css('position', 'relative');
		el.canvas = canvas[0];
		if ($.browser.msie) el.canvas = G_vmlCanvasManager.initElement(el.canvas);
		el.canvas.ctx = el.canvas.getContext('2d');
		el.canvas.roundCornersEvent = false;
		el.canvas.ctx.roundRect = function(width, height, x, y , tl, tr, bl, br){
			this.beginPath();
			if(tl>0) this.moveTo(tl + x, y);
			else this.moveTo(x, y);
			if(tl>0) this.quadraticCurveTo(x, y, x, tl + y);
			if(bl>0) this.lineTo(x, (height + y) - bl);
			else this.lineTo(x, height + y);
			if(bl>0) this.quadraticCurveTo(x, height + y, bl + x, height + y);
			if(br>0) this.lineTo((width + x) - br, height + y);
			else this.lineTo(width + x, height + y);
			if(br>0) this.quadraticCurveTo(width + x, height + y, width + x, (height + y) - br);
			if(tr>0) this.lineTo(width + x, tr + y);
			else this.lineTo(width + x, y);
			if(tr>0) this.quadraticCurveTo(width + x, y, width + x - tr, y);
			if(tl>0) this.lineTo(tl, y);
			else this.lineTo(x, y);
		};
		el.focused = false;
		el.styles = {
			bgColor : $(el).css('background-color'),
			radius : [0, 0, 0, 0],
			border : {
				top : {
					width : parseInt($(el).css('border-top-width')),
					color : $(el).css('border-top-color')
				},
				left : {
					width : parseInt($(el).css('border-left-width')),
					color : $(el).css('border-left-color')
				},
				bottom : {

					width : parseInt($(el).css('border-bottom-width')),
					color : $(el).css('border-bottom-color')
				},
				right : {
					width : parseInt($(el).css('border-right-width')),
					color : $(el).css('border-right-color')
				}
			},
			hover : {
				bgColor: $(el).css('hover:background-color'),
				border : {
					top : {
						width : parseInt($(el).css('hover:border-top-width')),
						color : $(el).css('hover:border-top-color')
					},
					left : {
						width : parseInt($(el).css('hover:border-left-width')),
						color : $(el).css('hover:border-left-color')
					},
					bottom : {
						width : parseInt($(el).css('hover:border-bottom-width')),
						color : $(el).css('hover:border-bottom-color')
					},
					right : {
						width : parseInt($(el).css('hover:border-right-width')),
						color : $(el).css('hover:border-right-color')
					}
				}
			},
			active : {
				bgColor: $(el).css('active:background-color'),
				border : {
					top : {
						width : parseInt($(el).css('active:border-top-width')),
						color : $(el).css('active:border-top-color')
					},
					left : {
						width : parseInt($(el).css('active:border-left-width')),
						color : $(el).css('active:border-left-color')
					},
					bottom : {
						width : parseInt($(el).css('active:border-bottom-width')),
						color : $(el).css('active:border-bottom-color')
					},
					right : {
						width : parseInt($(el).css('active:border-right-width')),
						color : $(el).css('active:border-right-color')
					}
				}
			},
			focus : {
				bgColor: $(el).css('focus:background-color'),
				opacity : $(el).css('opacity'),
				border : {
					top : {
						width : parseInt($(el).css('focus:border-top-width')),
						color : $(el).css('focus:border-top-color')
					},
					left : {
						width : parseInt($(el).css('focus:border-left-width')),
						color : $(el).css('focus:border-left-color')
					},
					bottom : {
						width : parseInt($(el).css('focus:border-bottom-width')),
						color : $(el).css('focus:border-bottom-color')
					},
					right : {
						width : parseInt($(el).css('focus:border-right-width')),
						color : $(el).css('focus:border-right-color')
					}
				}
			}
		};
		if(hide) $(el).hide();
	});
	return this;
};
$.fn.getCanvas = function(){
	var el = this;
	$(el).canvas();
	var cvs = $(el)[0].canvas;
	if ($.browser.msie) {
		$(cvs).children().css({
			'position': 'relative',
			'background': 'none',
			'border': 'none',
			'padding': '0px',
			'margin': '0px',
			'left': '0px',
			'top': '0px'
		});
	};
	return cvs;
};
$.fn.draw = function(specialStyle){
	$(this).each(function(){
		var el = this;
		var hide = false;
		if($(el).css('display')=='none'){
			hide = true;
			$(el).show();
		};
		var canvas = $(el).getCanvas(tl, tr, br, bl, width, height);
		var tl = el.styles.radius[0];
		var tr = el.styles.radius[1];
		var br = el.styles.radius[2];
		var bl = el.styles.radius[3];
		var border, bgColor;
		switch(specialStyle){
			case 'hover':
				border = el.styles.hover.border;
				bgColor = el.styles.hover.bgColor;
			break;
			case 'active':
				border = el.styles.active.border;
				bgColor = el.styles.active.bgColor;
			break;
			case 'focus':
				border = el.styles.focus.border;
				bgColor = el.styles.focus.bgColor;
			break;
			default:
				border = el.styles.border;
				bgColor = el.styles.bgColor;
		};
		var width = $(el).outerWidth();
		var height = $(el).outerHeight();
		$(canvas).attr({
			'width' : width,
			'height' : height
		}).offset($(el).offset());
		var ctx = canvas.ctx;
			if(canvas.oldWidth && canvas.oldHeight) ctx.clearRect(0, 0, canvas.oldWidth, canvas.oldHeight);
			canvas.oldWidth = width;
			canvas.oldHeight = height;
			var bWidth = border.top.width;
			if(border.right.width>bWidth) bWidth = border.right.width;
			if(border.bottom.width>bWidth) bWidth = border.bottom.width;
			if(border.left.width>bWidth) bWidth = border.left.width;
			if (bWidth > 0) {
				ctx.roundRect(width, height, 0, 0, tl, tr, bl, br);
				ctx.fillStyle = border.top.color;
				ctx.fill();
				if(bWidth>tl && bWidth>tr && bWidth>br && bWidth>bl){
					ctx.roundRect(width - (border.right.width+border.left.width), 
					height - (border.bottom.width+border.top.width), border.left.width, border.top.width, 
					0, 0, 0, 0);
				} else{
					ctx.roundRect(width - (border.right.width+border.left.width), 
						height - (border.bottom.width+border.top.width), border.left.width, border.top.width, 
						tl - border.left.width, tr - border.right.width, bl - border.left.width, br - border.right.width);
				};
				if(bgColor=='rgba(0, 0, 0, 0)' || bgColor=='transparent'){
					var parBgColor = '#ffffff';
					$(el).parents().each(function(){
						if($(this).css('background-color')!='rgba(0, 0, 0, 0)' && $(this).css('background-color')!='transparent'){
							parBgColor = $(this).css('background-color');
							return false;
						};
					});
					ctx.fillStyle = parBgColor;
				} else{
					ctx.fillStyle = bgColor;
				};
			} else{
				ctx.roundRect(width, 
					height, 0, 0, tl, tr, bl, br);
				ctx.fillStyle = bgColor;
			};
			ctx.fill();
		$(el).css({
			'background' : 'none',
			'border-color' : 'transparent'
		});
		if($.browser.msie &&  parseInt($.browser.version)==6){
			$(el).css({
				'padding-top' : parseInt($(el).css('padding-top')+border.top.width)+'px',
				'padding-left' : parseInt($(el).css('padding-left')+border.left.width)+'px',
				'border' : 'none'
			});
		};
		if(hide) $(el).hide();
	});
	return this;
};
function getGradient(ctx, colors, height){
	var grad = ctx.createLinearGradient(0, 0, 0, height);
	var g = 0;
	for(var i=0; i<colors.length; i+=1/(colors.length-1)){
		grad.addColorStop(i, colors[g]);	
		g++;
	};
	return grad;
};
$.fn.bg = function(radius, gradient, specialStyle){
	$(this).each(function(){
		var el = this;
		var $el = $(this);
		if(typeof($el.attr('radius'))!='undefined') alert('hi');
		if(typeof($el.attr('gradient'))!='undefined') gradient = eval($el.attr('gradient'));
		$el.canvas();
		el.canvas.args = {
			radius: radius,
			gradient: gradient
		};
		if(gradient){
			if(typeof gradient[0]=='object'){
				var colors = gradient[0];
				if(gradient[1]){
					if (gradient[1].length>0) var colorsHover = gradient[1];
					else colorsHover = colors;
				};
				if(gradient[2]){
					if (gradient[2].length>0) var colorsClick = gradient[2];
					else{
						if(colorsHover) var colorsClick = colorsHover;
						else var colorsClick = colors;
					};
				};
				if(gradient[3]){
					if (gradient[3].length>0) var colorsFocus = gradient[3];
					else{
						var colorsFocus = colors;
					};
				};
			} else{
				var colors = gradient;
				var colorsHover = gradient;
				var colorsClick = gradient;
				var colorsFocus = gradient;
			};
			if(colors) el.styles.bgColor = getGradient(el.canvas.ctx, colors, $el.outerHeight());
			if(colorsHover) el.styles.hover.bgColor = getGradient(el.canvas.ctx, colorsHover, $el.outerHeight());
			if(colorsClick) el.styles.active.bgColor = getGradient(el.canvas.ctx, colorsClick, $el.outerHeight());
			if(colorsFocus) el.styles.focus.bgColor = getGradient(el.canvas.ctx, colorsFocus, $el.outerHeight());
		};
		if(radius){
			if(typeof radius != 'object') radius = [radius, radius, radius, radius];
		} else{
			radius = [0, 0, 0, 0];
		};
		if(radius[0]==null){
			radius[0] = 14;
		};
		for(var i=0; i<4; i++){
			if(radius[i]==null){
				radius[i] = radius[0];
			};
			if(typeof radius[i] == 'string'){
				if (radius[i].search('em')!=-1) {
					radius[i] = parseFloat(radius[i]);
					radius[i] = radius[i] * 14;
				};
				radius[i] = parseInt(radius[i]);			
			};
		};
		el.styles.radius = radius;
		var canvas = el.canvas;
		if (!canvas.roundCornersEvent) {
			canvas.roundCornersEvent = true;
			$(window).resize(function(){
				$(el).bg(radius, gradient);
			});
			$(el).hover(function(){
				if(!el.focused) $(el).bg(radius, gradient, 'hover');
			}, function(){
				if(!el.focused) $(el).bg(radius, gradient);
			});
			$(el).mousedown(function(){
				if(!el.focused) $(el).bg(radius, gradient, 'active');
			});
			$(el).mouseup(function(){
				if(!el.focused) $(el).bg(radius, gradient, 'hover');
			});
			$(el).focus(function(){
				el.focused = true;
				$(el).bg(radius, gradient, 'focus');
			});
			$(el).blur(function(){
				el.focused = false;
				$(el).bg(radius, gradient);
			});
			emFuncs[emFuncs.length] = function(){
				if(!el.focused) $(el).bg(radius, gradient);
				else $(el).bg(radius, gradient, 'focus');
			};
		};
		$(el).draw(specialStyle);
	});
	return this;
};
$.fn.roundCorners = function(tl, tr, br, bl){
	return $(this).bg([tl, tr, br, bl]);
};
})(jQuery);