remove IE6 support for transparent PNGs

1. IE6 doesn't do the rest of HTML5 anyway, including gradients
2. I don't intend to support IE6
3. We don't use transparent PNGs

webroot/js/dd_belatedpng.js

@@ -1,328 +0,0 @@
-/**
-* DD_belatedPNG: Adds IE6 support: PNG images for CSS background-image and HTML <IMG/>.
-* Author: Drew Diller
-* Email: drew.diller@gmail.com
-* URL: http://www.dillerdesign.com/experiment/DD_belatedPNG/
-* Version: 0.0.8a
-* Licensed under the MIT License: http://dillerdesign.com/experiment/DD_belatedPNG/#license
-*
-* Example usage:
-* DD_belatedPNG.fix('.png_bg'); // argument is a CSS selector
-* DD_belatedPNG.fixPng( someNode ); // argument is an HTMLDomElement
-**/
-
-/*
-PLEASE READ:
-Absolutely everything in this script is SILLY.  I know this.  IE's rendering of certain pixels doesn't make sense, so neither does this code!
-*/
-
-var DD_belatedPNG = {
-	ns: 'DD_belatedPNG',
-	imgSize: {},
-	delay: 10,
-	nodesFixed: 0,
-	createVmlNameSpace: function () { /* enable VML */
-		if (document.namespaces && !document.namespaces[this.ns]) {
-			document.namespaces.add(this.ns, 'urn:schemas-microsoft-com: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 screenStyleSheet, printStyleSheet;
-		screenStyleSheet = document.createElement('style');
-		screenStyleSheet.setAttribute('media', 'screen');
-		document.documentElement.firstChild.insertBefore(screenStyleSheet, document.documentElement.firstChild.firstChild);
-		if (screenStyleSheet.styleSheet) {
-			screenStyleSheet = screenStyleSheet.styleSheet;
-			screenStyleSheet.addRule(this.ns + '\\:*', '{behavior:url(#default#VML)}');
-			screenStyleSheet.addRule(this.ns + '\\:shape', 'position:absolute;');
-			screenStyleSheet.addRule('img.' + this.ns + '_sizeFinder', 'behavior:none; border:none; position:absolute; z-index:-1; top:-10000px; visibility:hidden;'); /* large negative top value for avoiding vertical scrollbars for large images, suggested by James O'Brien, http://www.thanatopsic.org/hendrik/ */
-			this.screenStyleSheet = screenStyleSheet;
-			
-			/* Add a print-media stylesheet, for preventing VML artifacts from showing up in print (including preview). */
-			/* Thanks to Rémi Prévost for automating this! */
-			printStyleSheet = document.createElement('style');
-			printStyleSheet.setAttribute('media', 'print');
-			document.documentElement.firstChild.insertBefore(printStyleSheet, document.documentElement.firstChild.firstChild);
-			printStyleSheet = printStyleSheet.styleSheet;
-			printStyleSheet.addRule(this.ns + '\\:*', '{display: none !important;}');
-			printStyleSheet.addRule('img.' + this.ns + '_sizeFinder', '{display: none !important;}');
-		}
-	},
-	readPropertyChange: function () {
-		var el, display, v;
-		el = event.srcElement;
-		if (!el.vmlInitiated) {
-			return;
-		}
-		if (event.propertyName.search('background') != -1 || event.propertyName.search('border') != -1) {
-			DD_belatedPNG.applyVML(el);
-		}
-		if (event.propertyName == 'style.display') {
-			display = (el.currentStyle.display == 'none') ? 'none' : 'block';
-			for (v in el.vml) {
-				if (el.vml.hasOwnProperty(v)) {
-					el.vml[v].shape.style.display = display;
-				}
-			}
-		}
-		if (event.propertyName.search('filter') != -1) {
-			DD_belatedPNG.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;
-			el.vml.color.shape.style.filter = el.currentStyle.filter; /* complete guesswork */
-			el.vml.image.fill.opacity = trans; /* complete guesswork */
-		}
-	},
-	handlePseudoHover: function (el) {
-		setTimeout(function () { /* wouldn't work as intended without setTimeout */
-			DD_belatedPNG.applyVML(el);
-		}, 1);
-	},
-	/**
-	* This is the method to use in a document.
-	* @param {String} selector - REQUIRED - a CSS selector, such as '#doc .container'
-	**/
-	fix: function (selector) {
-		if (this.screenStyleSheet) {
-			var selectors, i;
-			selectors = selector.split(','); /* multiple selectors supported, no need for multiple calls to this anymore */
-			for (i=0; i<selectors.length; i++) {
-				this.screenStyleSheet.addRule(selectors[i], 'behavior:expression(DD_belatedPNG.fixPng(this))'); /* seems to execute the function without adding it to the stylesheet - interesting... */
-			}
-		}
-	},
-	applyVML: function (el) {
-		el.runtimeStyle.cssText = '';
-		this.vmlFill(el);
-		this.vmlOffsets(el);
-		this.vmlOpacity(el);
-		if (el.isImg) {
-			this.copyImageBorders(el);
-		}
-	},
-	attachHandlers: function (el) {
-		var self, handlers, handler, moreForAs, a, h;
-		self = this;
-		handlers = {resize: 'vmlOffsets', move: 'vmlOffsets'};
-		if (el.nodeName == 'A') {
-			moreForAs = {mouseleave: 'handlePseudoHover', mouseenter: 'handlePseudoHover', focus: 'handlePseudoHover', blur: 'handlePseudoHover'};
-			for (a in moreForAs) {			
-				if (moreForAs.hasOwnProperty(a)) {
-					handlers[a] = moreForAs[a];
-				}
-			}
-		}
-		for (h in handlers) {
-			if (handlers.hasOwnProperty(h)) {
-				handler = function () {
-					self[handlers[h]](el);
-				};
-				el.attachEvent('on' + h, handler);
-			}
-		}
-		el.attachEvent('onpropertychange', this.readPropertyChange);
-	},
-	giveLayout: function (el) {
-		el.style.zoom = 1;
-		if (el.currentStyle.position == 'static') {
-			el.style.position = 'relative';
-		}
-	},
-	copyImageBorders: function (el) {
-		var styles, s;
-		styles = {'borderStyle':true, 'borderWidth':true, 'borderColor':true};
-		for (s in styles) {
-			if (styles.hasOwnProperty(s)) {
-				el.vml.color.shape.style[s] = el.currentStyle[s];
-			}
-		}
-	},
-	vmlFill: function (el) {
-		if (!el.currentStyle) {
-			return;
-		} else {
-			var elStyle, noImg, lib, v, img, imgLoaded;
-			elStyle = el.currentStyle;
-		}
-		for (v in el.vml) {
-			if (el.vml.hasOwnProperty(v)) {
-				el.vml[v].shape.style.zIndex = elStyle.zIndex;
-			}
-		}
-		el.runtimeStyle.backgroundColor = '';
-		el.runtimeStyle.backgroundImage = '';
-		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;
-			}
-			lib = this;
-			if (!lib.imgSize[el.vmlBg]) { /* determine size of loaded image */
-				img = document.createElement('img');
-				lib.imgSize[el.vmlBg] = img;
-				img.className = lib.ns + '_sizeFinder';
-				img.runtimeStyle.cssText = 'behavior:none; position:absolute; left:-10000px; top:-10000px; border:none; margin:0; padding:0;'; /* make sure to set behavior to none to prevent accidental matching of the helper elements! */
-				imgLoaded = function () {
-					this.width = this.offsetWidth; /* weird cache-busting requirement! */
-					this.height = this.offsetHeight;
-					lib.vmlOffsets(el);
-				};
-				img.attachEvent('onload', imgLoaded);
-				img.src = el.vmlBg;
-				img.removeAttribute('width');
-				img.removeAttribute('height');
-				document.body.insertBefore(img, document.body.firstChild);
-			}
-			el.vml.image.fill.src = el.vmlBg;
-			noImg = false;
-		}
-		el.vml.image.fill.on = !noImg;
-		el.vml.image.fill.color = 'none';
-		el.vml.color.shape.style.backgroundColor = elStyle.backgroundColor;
-		el.runtimeStyle.backgroundImage = 'none';
-		el.runtimeStyle.backgroundColor = 'transparent';
-	},
-	/* IE can't figure out what do when the offsetLeft and the clientLeft add up to 1, and the VML ends up getting fuzzy... so we have to push/enlarge things by 1 pixel and then clip off the excess */
-	vmlOffsets: function (el) {
-		var thisStyle, size, fudge, makeVisible, bg, bgR, dC, altC, b, c, v;
-		thisStyle = el.currentStyle;
-		size = {'W':el.clientWidth+1, 'H':el.clientHeight+1, 'w':this.imgSize[el.vmlBg].width, 'h':this.imgSize[el.vmlBg].height, 'L':el.offsetLeft, 'T':el.offsetTop, 'bLW':el.clientLeft, 'bTW':el.clientTop};
-		fudge = (size.L + size.bLW == 1) ? 1 : 0;
-		/* vml shape, left, top, width, height, origin */
-		makeVisible = function (vml, l, t, w, h, o) {
-			vml.coordsize = w+','+h;
-			vml.coordorigin = o+','+o;
-			vml.path = 'm0,0l'+w+',0l'+w+','+h+'l0,'+h+' xe';
-			vml.style.width = w + 'px';
-			vml.style.height = h + 'px';
-			vml.style.left = l + 'px';
-			vml.style.top = t + 'px';
-		};
-		makeVisible(el.vml.color.shape, (size.L + (el.isImg ? 0 : size.bLW)), (size.T + (el.isImg ? 0 : size.bTW)), (size.W-1), (size.H-1), 0);
-		makeVisible(el.vml.image.shape, (size.L + size.bLW), (size.T + size.bTW), (size.W), (size.H), 1 );
-		bg = {'X':0, 'Y':0};
-		if (el.isImg) {
-			bg.X = parseInt(thisStyle.paddingLeft, 10) + 1;
-			bg.Y = parseInt(thisStyle.paddingTop, 10) + 1;
-		}
-		else {
-			for (b in bg) {
-				if (bg.hasOwnProperty(b)) {
-					this.figurePercentage(bg, size, b, thisStyle['backgroundPosition'+b]);
-				}
-			}
-		}
-		el.vml.image.fill.position = (bg.X/size.W) + ',' + (bg.Y/size.H);
-		bgR = thisStyle.backgroundRepeat;
-		dC = {'T':1, 'R':size.W+fudge, 'B':size.H, 'L':1+fudge}; /* these are defaults for repeat of any kind */
-		altC = { 'X': {'b1': 'L', 'b2': 'R', 'd': 'W'}, 'Y': {'b1': 'T', 'b2': 'B', 'd': 'H'} };
-		if (bgR != 'repeat' || el.isImg) {
-			c = {'T':(bg.Y), 'R':(bg.X+size.w), 'B':(bg.Y+size.h), '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 */
-				v = bgR.split('repeat-')[1].toUpperCase();
-				c[altC[v].b1] = 1;
-				c[altC[v].b2] = size[altC[v].d];
-			}
-			if (c.B > size.H) {
-				c.B = size.H;
-			}
-			el.vml.image.shape.style.clip = 'rect('+c.T+'px '+(c.R+fudge)+'px '+c.B+'px '+(c.L+fudge)+'px)';
-		}
-		else {
-			el.vml.image.shape.style.clip = 'rect('+dC.T+'px '+dC.R+'px '+dC.B+'px '+dC.L+'px)';
-		}
-	},
-	figurePercentage: function (bg, size, axis, position) {
-		var horizontal, fraction;
-		fraction = true;
-		horizontal = (axis == 'X');
-		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) / 100;
-				}
-				else {
-					fraction = false;
-				}
-		}
-		bg[axis] = Math.ceil(  fraction ? ( (size[horizontal?'W': 'H'] * bg[axis]) - (size[horizontal?'w': 'h'] * bg[axis]) ) : parseInt(position, 10)  );
-		if (bg[axis] % 2 === 0) {
-			bg[axis]++;
-		}
-		return bg[axis];
-	},
-	fixPng: function (el) {
-		el.style.behavior = 'none';
-		var lib, els, nodeStr, v, e;
-		if (el.nodeName == 'BODY' || el.nodeName == 'TD' || el.nodeName == 'TR') { /* elements not supported yet */
-			return;
-		}
-		el.isImg = false;
-		if (el.nodeName == 'IMG') {
-			if(el.src.toLowerCase().search(/\.png$/) != -1) {
-				el.isImg = true;
-				el.style.visibility = 'hidden';
-			}
-			else {
-				return;
-			}
-		}
-		else if (el.currentStyle.backgroundImage.toLowerCase().search('.png') == -1) {
-			return;
-		}
-		lib = DD_belatedPNG;
-		el.vml = {color: {}, image: {}};
-		els = {shape: {}, fill: {}};
-		for (v in el.vml) {
-			if (el.vml.hasOwnProperty(v)) {
-				for (e in els) {
-					if (els.hasOwnProperty(e)) {
-						nodeStr = lib.ns + ':' + e;
-						el.vml[v][e] = document.createElement(nodeStr);
-					}
-				}
-				el.vml[v].shape.stroked = false;
-				el.vml[v].shape.appendChild(el.vml[v].fill);
-				el.parentNode.insertBefore(el.vml[v].shape, el);
-			}
-		}
-		el.vml.image.shape.fillcolor = 'none'; /* Don't show blank white shapeangle when waiting for image to load. */
-		el.vml.image.fill.type = 'tile'; /* Makes image show up. */
-		el.vml.color.fill.on = false; /* Actually going to apply vml element's style.backgroundColor, so hide the whiteness. */
-		lib.attachHandlers(el);
-		lib.giveLayout(el);
-		lib.giveLayout(el.offsetParent);
-		el.vmlInitiated = true;
-		lib.applyVML(el); /* Render! */
-	}
-};
-try {
-	document.execCommand("BackgroundImageCache", false, true); /* TredoSoft Multiple IE doesn't like this, so try{} it */
-} catch(r) {}
-DD_belatedPNG.createVmlNameSpace();
-DD_belatedPNG.createVmlStyleSheet();