/**

* DD_roundies, this adds rounded-corner CSS in standard browsers and VML sublayers in IE that accomplish a similar appearance when comparing said browsers.

* Author: Drew Diller

* Email: drew.diller@gmail.com

* URL: http://www.dillerdesign.com/experiment/DD_roundies/

* Version: 0.0.2a

* Licensed under the MIT License: http://dillerdesign.com/experiment/DD_roundies/#license

*

* Usage:

* DD_roundies.addRule('#doc .container', '10px 5px'); // selector and multiple radii

* DD_roundies.addRule('.box', 5, true); // selector, radius, and optional addition of border-radius code for standard browsers.

* 

* Just want the PNG fixing effect for IE6, and don't want to also use the DD_belatedPNG library?  Don't give any additional arguments after the CSS selector.

* DD_roundies.addRule('.your .example img');

**/



var DD_roundies = {



	ns: 'DD_roundies',

	

	IE6: false,

	IE7: false,

	IE8: false,

	IEversion: function() {

		if (document.documentMode != 8 && document.namespaces && !document.namespaces[this.ns]) {

			this.IE6 = true;

			this.IE7 = true;

		}

		else if (document.documentMode == 8) {

			this.IE8 = true;

		}

	},

	querySelector: document.querySelectorAll,

	selectorsToProcess: [],

	imgSize: {},

	

	createVmlNameSpace: function() { /* enable VML */

		if (this.IE6 || this.IE7) {

			document.namespaces.add(this.ns, 'urn:schemas-microsoft-com:vml');

		}

		if (this.IE8) {

			document.writeln('<?import namespace="' + this.ns + '" implementation="#default#VML" ?>');

		}

	},

	

	createVmlStyleSheet: function() { /* style VML, enable behaviors */

		/*

			Just in case lots of other developers have added

			lots of other stylesheets using document.createStyleSheet

			and hit the 31-limit mark, let's not use that method!

			further reading: http://msdn.microsoft.com/en-us/library/ms531194(VS.85).aspx

		*/

		var style = document.createElement('style');

		document.documentElement.firstChild.insertBefore(style, document.documentElement.firstChild.firstChild);

		if (style.styleSheet) { /* IE */

			try {

				var styleSheet = style.styleSheet;

				styleSheet.addRule(this.ns + '\\:*', '{behavior:url(#default#VML)}');

				this.styleSheet = styleSheet;

			} catch(err) {}

		}

		else {

			this.styleSheet = style;

		}

	},

	

	/**

	* Method to use from afar - refer to it whenever.

	* Example for IE only: DD_roundies.addRule('div.boxy_box', '10px 5px');

	* Example for IE, Firefox, and WebKit: DD_roundies.addRule('div.boxy_box', '10px 5px', true);

	* @param {String} selector - REQUIRED - a CSS selector, such as '#doc .container'

	* @param {Integer} radius - REQUIRED - the desired radius for the box corners

	* @param {Boolean} standards - OPTIONAL - true if you also wish to output -moz-border-radius/-webkit-border-radius/border-radius declarations

	**/

	addRule: function(selector, rad, standards) {

		if (typeof rad == 'undefined' || rad === null) {

			rad = 0;

		}

		if (rad.constructor.toString().search('Array') == -1) {

			rad = rad.toString().replace(/[^0-9 ]/g, '').split(' ');

		}

		for (var i=0; i<4; i++) {

			rad[i] = (!rad[i] && rad[i] !== 0) ? rad[Math.max((i-2), 0)] : rad[i];

		}

		if (this.styleSheet) {

			if (this.styleSheet.addRule) { /* IE */

				var selectors = selector.split(','); /* multiple selectors supported, no need for multiple calls to this anymore */

				for (var i=0; i<selectors.length; i++) {

					this.styleSheet.addRule(selectors[i], 'behavior:expression(DD_roundies.roundify.call(this, [' + rad.join(',') + ']))'); /* seems to execute the function without adding it to the stylesheet - interesting... */

				}

			}

			else if (standards) {

				var moz_implementation = rad.join('px ') + 'px';

				this.styleSheet.appendChild(document.createTextNode(selector + ' {border-radius:' + moz_implementation + '; -moz-border-radius:' + moz_implementation + ';}'));

				this.styleSheet.appendChild(document.createTextNode(selector + ' {-webkit-border-top-left-radius:' + rad[0] + 'px ' + rad[0] + 'px; -webkit-border-top-right-radius:' + rad[1] + 'px ' + rad[1] + 'px; -webkit-border-bottom-right-radius:' + rad[2] + 'px ' + rad[2] + 'px; -webkit-border-bottom-left-radius:' + rad[3] + 'px ' + rad[3] + 'px;}'));

			}

		}

		else if (this.IE8) {

			this.selectorsToProcess.push({'selector':selector, 'radii':rad});

		}

	},

	

	readPropertyChanges: function(el) {

		switch (event.propertyName) {

			case 'style.border':

			case 'style.borderWidth':

			case 'style.padding':

				this.applyVML(el);

				break;

			case 'style.borderColor':

				this.vmlStrokeColor(el);

				break;

			case 'style.backgroundColor':

			case 'style.backgroundPosition':

			case 'style.backgroundRepeat':

				this.applyVML(el);

				break;

			case 'style.display':

				el.vmlBox.style.display = (el.style.display == 'none') ? 'none' : 'block';

				break;

			case 'style.filter':

				this.vmlOpacity(el);

				break;

			case 'style.zIndex':

				el.vmlBox.style.zIndex = el.style.zIndex;

				break;

		}

	},

	

	applyVML: function(el) {

		el.runtimeStyle.cssText = '';

		this.vmlFill(el);

		this.vmlStrokeColor(el);

		this.vmlStrokeWeight(el);

		this.vmlOffsets(el);

		this.vmlPath(el);

		this.nixBorder(el);

		this.vmlOpacity(el);

	},

	

	vmlOpacity: function(el) {

		if (el.currentStyle.filter.search('lpha') != -1) {

			var trans = el.currentStyle.filter;

			trans = parseInt(trans.substring(trans.lastIndexOf('=')+1, trans.lastIndexOf(')')), 10)/100;

			for (var v in el.vml) {

				el.vml[v].filler.opacity = trans;

			}

		}

	},

	

	vmlFill: function(el) {

		if (!el.currentStyle) {

			return;

		} else {

			var elStyle = el.currentStyle;

		}

		el.runtimeStyle.backgroundColor = '';

		el.runtimeStyle.backgroundImage = '';

		var noColor = (elStyle.backgroundColor == 'transparent');

		var noImg = true;

		if (elStyle.backgroundImage != 'none' || el.isImg) {

			if (!el.isImg) {

				el.vmlBg = elStyle.backgroundImage;

				el.vmlBg = el.vmlBg.substr(5, el.vmlBg.lastIndexOf('")')-5);

			}

			else {

				el.vmlBg = el.src;

			}

			var lib = this;

			if (!lib.imgSize[el.vmlBg]) { /* determine size of loaded image */

				var img = document.createElement('img');

				img.attachEvent('onload', function() {

					this.width = this.offsetWidth; /* weird cache-busting requirement! */

					this.height = this.offsetHeight;

					lib.vmlOffsets(el);

				});

				img.className = lib.ns + '_sizeFinder';

				img.runtimeStyle.cssText = 'behavior:none; position:absolute; top:-10000px; left:-10000px; border:none;'; /* make sure to set behavior to none to prevent accidental matching of the helper elements! */

				img.src = el.vmlBg;

				img.removeAttribute('width');

				img.removeAttribute('height');

				document.body.insertBefore(img, document.body.firstChild);

				lib.imgSize[el.vmlBg] = img;

			}

			el.vml.image.filler.src = el.vmlBg;

			noImg = false;

		}

		el.vml.image.filled = !noImg;

		el.vml.image.fillcolor = 'none';

		el.vml.color.filled = !noColor;

		el.vml.color.fillcolor = elStyle.backgroundColor;

		el.runtimeStyle.backgroundImage = 'none';

		el.runtimeStyle.backgroundColor = 'transparent';

	},

	

	vmlStrokeColor: function(el) {

		el.vml.stroke.fillcolor = el.currentStyle.borderColor;

	},

	

	vmlStrokeWeight: function(el) {

		var borders = ['Top', 'Right', 'Bottom', 'Left'];

		el.bW = {};

		for (var b=0; b<4; b++) {

			el.bW[borders[b]] = parseInt(el.currentStyle['border' + borders[b] + 'Width'], 10) || 0;

		}

	},

	

	vmlOffsets: function(el) {

		var dims = ['Left', 'Top', 'Width', 'Height'];

		for (var d=0; d<4; d++) {

			el.dim[dims[d]] = el['offset'+dims[d]];

		}

		var assign = function(obj, topLeft) {

			obj.style.left = (topLeft ? 0 : el.dim.Left) + 'px';

			obj.style.top = (topLeft ? 0 : el.dim.Top) + 'px';

			obj.style.width = el.dim.Width + 'px';

			obj.style.height = el.dim.Height + 'px';

		};

		for (var v in el.vml) {

			var mult = (v == 'image') ? 1 : 2;

			el.vml[v].coordsize = (el.dim.Width*mult) + ', ' + (el.dim.Height*mult);

			assign(el.vml[v], true);

		}

		assign(el.vmlBox, false);

		

		if (DD_roundies.IE8) {

			el.vml.stroke.style.margin = '-1px';

			if (typeof el.bW == 'undefined') {

				this.vmlStrokeWeight(el);

			}

			el.vml.color.style.margin = (el.bW.Top-1) + 'px ' + (el.bW.Left-1) + 'px';

		}

	},

	

	vmlPath: function(el) {

		var coords = function(direction, w, h, r, aL, aT, mult) {

			var cmd = direction ? ['m', 'qy', 'l', 'qx', 'l', 'qy', 'l', 'qx', 'l'] : ['qx', 'l', 'qy', 'l', 'qx', 'l', 'qy', 'l', 'm']; /* whoa */

			aL *= mult;

			aT *= mult;

			w *= mult;

			h *= mult;

			var R = r.slice(); /* do not affect original array */

			for (var i=0; i<4; i++) {

				R[i] *= mult;

				R[i] = Math.min(w/2, h/2, R[i]); /* make sure you do not get funky shapes - pick the smallest: half of the width, half of the height, or current value */

			}

			var coords = [

				cmd[0] + Math.floor(0+aL) +','+ Math.floor(R[0]+aT),

				cmd[1] + Math.floor(R[0]+aL) +','+ Math.floor(0+aT),

				cmd[2] + Math.ceil(w-R[1]+aL) +','+ Math.floor(0+aT),

				cmd[3] + Math.ceil(w+aL) +','+ Math.floor(R[1]+aT),

				cmd[4] + Math.ceil(w+aL) +','+ Math.ceil(h-R[2]+aT),

				cmd[5] + Math.ceil(w-R[2]+aL) +','+ Math.ceil(h+aT),

				cmd[6] + Math.floor(R[3]+aL) +','+ Math.ceil(h+aT),

				cmd[7] + Math.floor(0+aL) +','+ Math.ceil(h-R[3]+aT),

				cmd[8] + Math.floor(0+aL) +','+ Math.floor(R[0]+aT)

			];

			if (!direction) {

				coords.reverse();

			}

			var path = coords.join('');

			return path;

		};

	

		if (typeof el.bW == 'undefined') {

			this.vmlStrokeWeight(el);

		}

		var bW = el.bW;

		var rad = el.DD_radii.slice();

		

		/* determine outer curves */

		var outer = coords(true, el.dim.Width, el.dim.Height, rad, 0, 0, 2);

		

		/* determine inner curves */

		rad[0] -= Math.max(bW.Left, bW.Top);

		rad[1] -= Math.max(bW.Top, bW.Right);

		rad[2] -= Math.max(bW.Right, bW.Bottom);

		rad[3] -= Math.max(bW.Bottom, bW.Left);

		for (var i=0; i<4; i++) {

			rad[i] = Math.max(rad[i], 0);

		}

		var inner = coords(false, el.dim.Width-bW.Left-bW.Right, el.dim.Height-bW.Top-bW.Bottom, rad, bW.Left, bW.Top, 2);

		var image = coords(true, el.dim.Width-bW.Left-bW.Right+1, el.dim.Height-bW.Top-bW.Bottom+1, rad, bW.Left, bW.Top, 1);

		

		/* apply huge path string */

		el.vml.color.path = inner;

		el.vml.image.path = image;

		el.vml.stroke.path = outer + inner;

		

		this.clipImage(el);

	},

	

	nixBorder: function(el) {

		var s = el.currentStyle;

		var sides = ['Top', 'Left', 'Right', 'Bottom'];

		for (var i=0; i<4; i++) {

			el.runtimeStyle['padding' + sides[i]] = (parseInt(s['padding' + sides[i]], 10) || 0) + (parseInt(s['border' + sides[i] + 'Width'], 10) || 0) + 'px';

		}

		el.runtimeStyle.border = 'none';

	},

	

	clipImage: function(el) {

		var lib = DD_roundies;

		if (!el.vmlBg || !lib.imgSize[el.vmlBg]) {

			return;

		}

		var thisStyle = el.currentStyle;

		var bg = {'X':0, 'Y':0};

		var figurePercentage = function(axis, position) {

			var fraction = true;

			switch(position) {

				case 'left':

				case 'top':

					bg[axis] = 0;

					break;

				case 'center':

					bg[axis] = 0.5;

					break;

				case 'right':

				case 'bottom':

					bg[axis] = 1;

					break;

				default:

					if (position.search('%') != -1) {

						bg[axis] = parseInt(position, 10) * 0.01;

					}

					else {

						fraction = false;

					}

			}

			var horz = (axis == 'X');

			bg[axis] = Math.ceil(fraction ? (( el.dim[horz ? 'Width' : 'Height'] - (el.bW[horz ? 'Left' : 'Top'] + el.bW[horz ? 'Right' : 'Bottom']) ) * bg[axis]) - (lib.imgSize[el.vmlBg][horz ? 'width' : 'height'] * bg[axis]) : parseInt(position, 10));

			bg[axis] += 1;

		};

		for (var b in bg) {

			figurePercentage(b, thisStyle['backgroundPosition'+b]);

		}

		el.vml.image.filler.position = (bg.X/(el.dim.Width-el.bW.Left-el.bW.Right+1)) + ',' + (bg.Y/(el.dim.Height-el.bW.Top-el.bW.Bottom+1));

		var bgR = thisStyle.backgroundRepeat;

		var c = {'T':1, 'R':el.dim.Width+1, 'B':el.dim.Height+1, 'L':1}; /* these are defaults for repeat of any kind */

		var altC = { 'X': {'b1': 'L', 'b2': 'R', 'd': 'Width'}, 'Y': {'b1': 'T', 'b2': 'B', 'd': 'Height'} };

		if (bgR != 'repeat') {

			c = {'T':(bg.Y), 'R':(bg.X+lib.imgSize[el.vmlBg].width), 'B':(bg.Y+lib.imgSize[el.vmlBg].height), 'L':(bg.X)}; /* these are defaults for no-repeat - clips down to the image location */

			if (bgR.search('repeat-') != -1) { /* now let's revert to dC for repeat-x or repeat-y */

				var v = bgR.split('repeat-')[1].toUpperCase();

				c[altC[v].b1] = 1;

				c[altC[v].b2] = el.dim[altC[v].d]+1;

			}

			if (c.B > el.dim.Height) {

				c.B = el.dim.Height+1;

			}

		}

		el.vml.image.style.clip = 'rect('+c.T+'px '+c.R+'px '+c.B+'px '+c.L+'px)';

	},

	

	pseudoClass: function(el) {

		var self = this;

		setTimeout(function() { /* would not work as intended without setTimeout */

			self.applyVML(el);

		}, 1);

	},

	

	reposition: function(el) {

		this.vmlOffsets(el);

		this.vmlPath(el);

	},

	

	roundify: function(rad) {

		this.style.behavior = 'none';

		if (!this.currentStyle) {

			return;

		}

		else {

			var thisStyle = this.currentStyle;

		}

		var allowed = {BODY: false, TABLE: false, TR: false, TD: false, SELECT: false, OPTION: false, TEXTAREA: false};

		if (allowed[this.nodeName] === false) { /* elements not supported yet */

			return;

		}

		var self = this; /* who knows when you might need a setTimeout */

		var lib = DD_roundies;

		this.DD_radii = rad;

		this.dim = {};



		/* attach handlers */

		var handlers = {resize: 'reposition', move: 'reposition'};

		if (this.nodeName == 'A') {

			var moreForAs = {mouseleave: 'pseudoClass', mouseenter: 'pseudoClass', focus: 'pseudoClass', blur: 'pseudoClass'};

			for (var a in moreForAs) {

				handlers[a] = moreForAs[a];

			}

		}

		for (var h in handlers) {

			this.attachEvent('on' + h, function() {

				lib[handlers[h]](self);

			});

		}

		this.attachEvent('onpropertychange', function() {

			lib.readPropertyChanges(self);

		});

		

		/* ensure that this elent and its parent is given hasLayout (needed for accurate positioning) */

		var giveLayout = function(el) {

			el.style.zoom = 1;

			if (el.currentStyle.position == 'static') {

				el.style.position = 'relative';

			}

		};

		giveLayout(this.offsetParent);

		giveLayout(this);

		

		/* create vml elements */

		this.vmlBox = document.createElement('ignore'); /* IE8 really wants to be encased in a wrapper element for the VML to work, and I don't want to disturb getElementsByTagName('div') - open to suggestion on how to do this differently */

		this.vmlBox.runtimeStyle.cssText = 'behavior:none; position:absolute; margin:0; padding:0; border:0; background:none;'; /* super important - if something accidentally matches this (you yourseld did this once, Drew), you'll get infinitely-created elements and a frozen browser! */

		this.vmlBox.style.zIndex = thisStyle.zIndex;

		this.vml = {'color':true, 'image':true, 'stroke':true};

		for (var v in this.vml) {

			this.vml[v] = document.createElement(lib.ns + ':shape');

			this.vml[v].filler = document.createElement(lib.ns + ':fill');

			this.vml[v].appendChild(this.vml[v].filler);

			this.vml[v].stroked = false;

			this.vml[v].style.position = 'absolute';

			this.vml[v].style.zIndex = thisStyle.zIndex;

			this.vml[v].coordorigin = '1,1';

			this.vmlBox.appendChild(this.vml[v]);

		}

		this.vml.image.fillcolor = 'none';

		this.vml.image.filler.type = 'tile';

		this.parentNode.insertBefore(this.vmlBox, this);

		

		this.isImg = false;

		if (this.nodeName == 'IMG') {

			this.isImg = true;

			this.style.visibility = 'hidden';

		}

		

		setTimeout(function() {

			lib.applyVML(self);

		}, 1);

	}

	

};



try {

	document.execCommand("BackgroundImageCache", false, true);

} catch(err) {}

DD_roundies.IEversion();

DD_roundies.createVmlNameSpace();

DD_roundies.createVmlStyleSheet();



if (DD_roundies.IE8 && document.attachEvent && DD_roundies.querySelector) {

	document.attachEvent('onreadystatechange', function() {

		if (document.readyState == 'complete') {

			var selectors = DD_roundies.selectorsToProcess;

			var length = selectors.length;

			var delayedCall = function(node, radii, index) {

				setTimeout(function() {

					DD_roundies.roundify.call(node, radii);

				}, index*100);

			};

			for (var i=0; i<length; i++) {

				var results = document.querySelectorAll(selectors[i].selector);

				var rLength = results.length;

				for (var r=0; r<rLength; r++) {

					if (results[r].nodeName != 'INPUT') { /* IE8 doesn't like to do this to inputs yet */

						delayedCall(results[r], selectors[i].radii, r);

					}

				}

			}

		}

	});

}





/* CONFIG */

DD_roundies.addRule('#nav-global li strong, #nav-global li.open a, #section-header, #nav-global li a:hover', '5px');

//DD_roundies.addRule('#nav-box ul ul, #nav-box ul ul ul, #nav-box li strong, #nav-box a:hover', '5px 0 0 5px');