--Do not remove this if you are using--
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Original Author: Remiz Rahnas
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Original Author URL: http://www.htmlremix.com
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Published date: 2008/09/24
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Changes by Nick Fetchak:
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- IE8 standards mode compatibility
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- VML elements now positioned behind original box rather than inside of it - should be less prone to breakage
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- Added partial support for 'box-shadow' style
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- Checks for VML support before doing anything
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- Updates VML element size and position via timer and also via window resize event
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- lots of other small things
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Published date : 2010/03/14
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http://fetchak.com/ie-css3
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Thanks to TheBrightLines.com (http://www.thebrightlines.com/2009/12/03/using-ies-filter-in-a-cross-browser-way) for enlightening me about the DropShadow filter
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<public:attach event="ondocumentready" onevent="ondocumentready('v08vnSVo78t4JfjH')" />
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<script type="text/javascript">
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timer_length = 200; // Milliseconds
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border_opacity = false; // Use opacity on borders of rounded-corner elements? Note: This causes antialiasing issues
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// supportsVml() borrowed from http://stackoverflow.com/questions/654112/how-do-you-detect-support-for-vml-or-svg-in-a-browser
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function supportsVml() {
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if (typeof supportsVml.supported == "undefined") {
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var a = document.body.appendChild(document.createElement('div'));
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a.innerHTML = '<v:shape id="vml_flag1" adj="1" />';
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var b = a.firstChild;
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b.style.behavior = "url(#default#VML)";
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supportsVml.supported = b ? typeof b.adj == "object": true;
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a.parentNode.removeChild(a);
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}
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return supportsVml.supported
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}
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// findPos() borrowed from http://www.quirksmode.org/js/findpos.html
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function findPos(obj) {
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var curleft = curtop = 0;
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if (obj.offsetParent) {
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do {
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curleft += obj.offsetLeft;
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curtop += obj.offsetTop;
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} while (obj = obj.offsetParent);
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}
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return({
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'x': curleft,
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'y': curtop
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});
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}
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function createBoxShadow(element, vml_parent) {
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var style = element.currentStyle['iecss3-box-shadow'] || element.currentStyle['-moz-box-shadow'] || element.currentStyle['-webkit-box-shadow'] || element.currentStyle['box-shadow'] || '';
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var match = style.match(/^(\d+)px (\d+)px (\d+)px/);
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if (!match) { return(false); }
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var shadow = document.createElement('v:roundrect');
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shadow.userAttrs = {
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'x': parseInt(RegExp.$1 || 0),
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'y': parseInt(RegExp.$2 || 0),
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'radius': parseInt(RegExp.$3 || 0) / 2
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};
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shadow.position_offset = {
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'y': (0 - vml_parent.pos_ieCSS3.y - shadow.userAttrs.radius + shadow.userAttrs.y),
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'x': (0 - vml_parent.pos_ieCSS3.x - shadow.userAttrs.radius + shadow.userAttrs.x)
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};
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shadow.size_offset = {
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'width': 0,
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'height': 0
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};
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shadow.arcsize = element.arcSize +'px';
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shadow.style.display = 'block';
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shadow.style.position = 'absolute';
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shadow.style.top = (element.pos_ieCSS3.y + shadow.position_offset.y) +'px';
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shadow.style.left = (element.pos_ieCSS3.x + shadow.position_offset.x) +'px';
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shadow.style.width = element.offsetWidth +'px';
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shadow.style.height = element.offsetHeight +'px';
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shadow.style.antialias = true;
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shadow.className = 'vml_box_shadow';
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shadow.style.zIndex = element.zIndex - 1;
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shadow.style.filter = 'progid:DXImageTransform.Microsoft.Blur(pixelRadius='+ shadow.userAttrs.radius +',makeShadow=true,shadowOpacity='+ element.opacity +')';
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element.parentNode.appendChild(shadow);
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//element.parentNode.insertBefore(shadow, element.element);
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// For window resizing
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element.vml.push(shadow);
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return(true);
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}
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function createBorderRect(element, vml_parent) {
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if (isNaN(element.borderRadius)) { return(false); }
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element.style.background = 'transparent';
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element.style.borderColor = 'transparent';
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var rect = document.createElement('v:roundrect');
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rect.position_offset = {
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'y': (0.5 * element.strokeWeight) - vml_parent.pos_ieCSS3.y,
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'x': (0.5 * element.strokeWeight) - vml_parent.pos_ieCSS3.x
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};
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rect.size_offset = {
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'width': 0 - element.strokeWeight,
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'height': 0 - element.strokeWeight
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};
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rect.arcsize = element.arcSize +'px';
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rect.strokeColor = element.strokeColor;
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rect.strokeWeight = element.strokeWeight +'px';
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rect.stroked = element.stroked;
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rect.className = 'vml_border_radius';
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rect.style.display = 'block';
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rect.style.position = 'absolute';
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rect.style.top = (element.pos_ieCSS3.y + rect.position_offset.y) +'px';
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rect.style.left = (element.pos_ieCSS3.x + rect.position_offset.x) +'px';
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rect.style.width = (element.offsetWidth + rect.size_offset.width) +'px';
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rect.style.height = (element.offsetHeight + rect.size_offset.height) +'px';
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rect.style.antialias = true;
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rect.style.zIndex = element.zIndex - 1;
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if (border_opacity && (element.opacity < 1)) {
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rect.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(Opacity='+ parseFloat(element.opacity * 100) +')';
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}
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var fill = document.createElement('v:fill');
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fill.color = element.fillColor;
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fill.src = element.fillSrc;
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fill.className = 'vml_border_radius_fill';
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fill.type = 'tile';
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fill.opacity = element.opacity;
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// Hack: IE6 doesn't support transparent borders, use padding to offset original element
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isIE6 = /msie|MSIE 6/.test(navigator.userAgent);
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if (isIE6 && (element.strokeWeight > 0)) {
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element.style.borderStyle = 'none';
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element.style.paddingTop = parseInt(element.currentStyle.paddingTop || 0) + element.strokeWeight;
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element.style.paddingBottom = parseInt(element.currentStyle.paddingBottom || 0) + element.strokeWeight;
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}
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rect.appendChild(fill);
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element.parentNode.appendChild(rect);
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//element.parentNode.insertBefore(rect, element.element);
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// For window resizing
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element.vml.push(rect);
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return(true);
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}
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function createTextShadow(element, vml_parent) {
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if (!element.textShadow) { return(false); }
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var match = element.textShadow.match(/^(\d+)px (\d+)px (\d+)px (#?\w+)/);
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if (!match) { return(false); }
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//var shadow = document.createElement('span');
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var shadow = element.cloneNode(true);
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var radius = parseInt(RegExp.$3 || 0);
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shadow.userAttrs = {
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'x': parseInt(RegExp.$1 || 0) - (radius),
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'y': parseInt(RegExp.$2 || 0) - (radius),
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'radius': radius / 2,
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'color': (RegExp.$4 || '#000')
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};
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shadow.position_offset = {
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'y': (0 - vml_parent.pos_ieCSS3.y + shadow.userAttrs.y),
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'x': (0 - vml_parent.pos_ieCSS3.x + shadow.userAttrs.x)
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};
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shadow.size_offset = {
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'width': 0,
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'height': 0
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};
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shadow.style.color = shadow.userAttrs.color;
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shadow.style.position = 'absolute';
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shadow.style.top = (element.pos_ieCSS3.y + shadow.position_offset.y) +'px';
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shadow.style.left = (element.pos_ieCSS3.x + shadow.position_offset.x) +'px';
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shadow.style.antialias = true;
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shadow.style.behavior = null;
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shadow.className = 'ieCSS3_text_shadow';
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shadow.innerHTML = element.innerHTML;
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// For some reason it only looks right with opacity at 75%
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shadow.style.filter = '\
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progid:DXImageTransform.Microsoft.Alpha(Opacity=75)\
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progid:DXImageTransform.Microsoft.Blur(pixelRadius='+ shadow.userAttrs.radius +',makeShadow=false,shadowOpacity=100)\
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';
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var clone = element.cloneNode(true);
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clone.position_offset = {
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'y': (0 - vml_parent.pos_ieCSS3.y),
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'x': (0 - vml_parent.pos_ieCSS3.x)
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};
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clone.size_offset = {
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'width': 0,
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'height': 0
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};
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clone.style.behavior = null;
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clone.style.position = 'absolute';
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clone.style.top = (element.pos_ieCSS3.y + clone.position_offset.y) +'px';
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clone.style.left = (element.pos_ieCSS3.x + clone.position_offset.x) +'px';
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clone.className = 'ieCSS3_text_shadow';
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element.parentNode.appendChild(shadow);
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element.parentNode.appendChild(clone);
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element.style.visibility = 'hidden';
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// For window resizing
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element.vml.push(clone);
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element.vml.push(shadow);
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return(true);
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}
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function ondocumentready(classID) {
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if (!supportsVml()) { return(false); }
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if (this.className.match(classID)) { return(false); }
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this.className = this.className.concat(' ', classID);
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// Add a namespace for VML (IE8 requires it)
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if (!document.namespaces.v) { document.namespaces.add("v", "urn:schemas-microsoft-com:vml"); }
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// Check to see if we've run once before on this page
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if (typeof(window.ieCSS3) == 'undefined') {
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// Create global ieCSS3 object
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window.ieCSS3 = {
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'vmlified_elements': new Array(),
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'update_timer': setInterval(updatePositionAndSize, timer_length)
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};
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if (typeof(window.onresize) == 'function') { window.ieCSS3.previous_onresize = window.onresize; }
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// Attach window resize event
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window.onresize = updatePositionAndSize;
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}
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// These attrs are for the script and have no meaning to the browser:
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this.borderRadius = parseInt(this.currentStyle['iecss3-border-radius'] ||
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this.currentStyle['-moz-border-radius'] ||
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this.currentStyle['-webkit-border-radius'] ||
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this.currentStyle['border-radius'] ||
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this.currentStyle['-khtml-border-radius']);
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this.arcSize = Math.min(this.borderRadius / Math.min(this.offsetWidth, this.offsetHeight), 1);
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this.fillColor = this.currentStyle.backgroundColor;
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this.fillSrc = this.currentStyle.backgroundImage.replace(/^url\("(.+)"\)$/, '$1');
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this.strokeColor = this.currentStyle.borderColor;
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this.strokeWeight = parseInt(this.currentStyle.borderWidth);
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this.stroked = 'true';
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if (isNaN(this.strokeWeight) || (this.strokeWeight == 0)) {
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this.strokeWeight = 0;
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this.strokeColor = fillColor;
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this.stroked = 'false';
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}
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this.opacity = parseFloat(this.currentStyle.opacity || 1);
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this.textShadow = this.currentStyle['text-shadow'];
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this.element.vml = new Array();
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this.zIndex = parseInt(this.currentStyle.zIndex);
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if (isNaN(this.zIndex)) { this.zIndex = 0; }
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// Find which element provides position:relative for the target element (default to BODY)
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vml_parent = this;
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var limit = 100, i = 0;
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do {
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vml_parent = vml_parent.parentElement;
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i++;
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if (i >= limit) { return(false); }
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} while ((typeof(vml_parent) != 'undefined') && (vml_parent.currentStyle.position != 'relative') && (vml_parent.tagName != 'BODY'));
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vml_parent.pos_ieCSS3 = findPos(vml_parent);
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this.pos_ieCSS3 = findPos(this);
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var rv1 = createBoxShadow(this, vml_parent);
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var rv2 = createBorderRect(this, vml_parent);
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var rv3 = createTextShadow(this, vml_parent);
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if (rv1 || rv2 || rv3) { window.ieCSS3.vmlified_elements.push(this.element); }
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if (typeof(vml_parent.document.ieCSS3_stylesheet) == 'undefined') {
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vml_parent.document.ieCSS3_stylesheet = vml_parent.document.createStyleSheet();
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vml_parent.document.ieCSS3_stylesheet.addRule("v\\:roundrect", "behavior: url(#default#VML)");
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vml_parent.document.ieCSS3_stylesheet.addRule("v\\:fill", "behavior: url(#default#VML)");
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// Compatibility with IE7.js
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vml_parent.document.ieCSS3_stylesheet.ie7 = true;
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}
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}
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function updatePositionAndSize() {
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if (typeof(window.ieCSS3.vmlified_elements) != 'object') { return(false); }
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for (var i in window.ieCSS3.vmlified_elements) {
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var el = window.ieCSS3.vmlified_elements[i];
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if (typeof(el.vml) != 'object') { continue; }
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for (var z in el.vml) {
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//var parent_pos = findPos(el.vml[z].parentNode);
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var new_pos = findPos(el);
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new_pos.x = (new_pos.x + el.vml[z].position_offset.x) + 'px';
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new_pos.y = (new_pos.y + el.vml[z].position_offset.y) + 'px';
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if (el.vml[z].style.left != new_pos.x) { el.vml[z].style.left = new_pos.x; }
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if (el.vml[z].style.top != new_pos.y) { el.vml[z].style.top = new_pos.y; }
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var new_size = {
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'width': parseInt(el.offsetWidth + el.vml[z].size_offset.width),
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'height': parseInt(el.offsetHeight + el.vml[z].size_offset.height)
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}
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if (el.vml[z].offsetWidth != new_size.width) { el.vml[z].style.width = new_size.width +'px'; }
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if (el.vml[z].offsetHeight != new_size.height) { el.vml[z].style.height = new_size.height +'px'; }
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}
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}
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if (event && (event.type == 'resize') && typeof(window.ieCSS3.previous_onresize) == 'function') { window.ieCSS3.previous_onresize(); }
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}
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</script>
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