boxsizing.htc

<component lightWeight="true">
<attach event="onpropertychange" onevent="checkPropertyChange()" />
<attach event="ondetach" onevent="restore()" />
<attach event="onresize" for="window" onevent="restore();init()" />
<script type="text/javascript">
//<![CDATA[

var viewportwidth = (typeof window.innerWidth != 'undefined' ? window.innerWidth : element.document.documentElement.clientWidth);
// Shortcut for the document object
var doc = element.document;
//doc.body.style.width = viewportwidth;

/*
* init gets called once at the start and then never again, 
* triggers box-sizing calculations and updates width and height
*/
function init(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		updateBorderBoxWidth();
		updateBorderBoxHeight();
	}
}

/*
* restore gets called when the behavior is being detached (see event binding at the top),
* resets everything like it was before applying the behavior
*/
function restore(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		element.runtimeStyle.width = "";
		element.runtimeStyle.height = "";
	}
}

/*
* checkPropertyChange gets called as soon as an element property changes 
* (see event binding at the top), it then checks if any property influencing its 
* dimensions was changed and if yes recalculates width and height 
*/
function checkPropertyChange(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		var pn = event.propertyName;
		var undef;
		if(pn == "style.boxSizing" && element.style.boxSizing == ""){
			element.style.removeAttribute("boxSizing");
			element.runtimeStyle.boxSizing = undef;
		}
		switch (pn){
			case "style.width":
			case "style.borderLeftWidth":
			case "style.borderLeftStyle":
			case "style.borderRightWidth":
			case "style.borderRightStyle":
			case "style.paddingLeft":
			case "style.paddingRight":
				updateBorderBoxWidth();
			break;
		
			case "style.height":
			case "style.borderTopWidth":
			case "style.borderTopStyle":
			case "style.borderBottomWidth":
			case "style.borderBottomStyle":
			case "style.paddingTop":
			case "style.paddingBottom":
				updateBorderBoxHeight();
			break;
		
			case "className":
			case "style.boxSizing":
				updateBorderBoxWidth();
				updateBorderBoxHeight();
			break;
		}
	}
}

/* 
 * Helper function, taken from Dean Edward's IE7 framework,
 * added by Schepp on 12.06.2010.
 * http://code.google.com/p/ie7-js/
 * MIT License (http://www.opensource.org/licenses/mit-license.php)
 *
 * Allows us to convert from relative to pixel-values.
 *
 * Citing Dean himself:
 * "MSIE6+ has special pixelLeft/Width/Height etc properties. 
 * They represent the current pixel value of the equivalent style setting. 
 * So, if you have style.width=8em then style.pixelWidth would return the 
 * pixel equivalent. MSIE also supports an override style called runtimeStyle. 
 * Setting properties on runtimeStyle overrides all other style properties.
 *
 * This trick works by setting style.left and then getting MSIE to convert 
 * it by calling style.pixelLeft. To stop the element moving around the screen 
 * when we do this, we set runtimeStyle.left with the current left value. 
 * After we’ve done the conversion we set everything back to the way it was.
 *
 * http://ajaxian.com/archives/computed-vs-cascaded-style
 */
function getPixelValue(value){
	var PIXEL = /^\d+(px)?$/i;
	if (PIXEL.test(value)) return parseInt(value);
	var style = element.style.left;
	var runtimeStyle = element.runtimeStyle.left;
	element.runtimeStyle.left = element.currentStyle.left;
	element.style.left = value || 0;
	value = parseInt(element.style.pixelLeft);
	element.style.left = style;
	element.runtimeStyle.left = runtimeStyle;
	
	return value;
}

function getPixelWidth(object, value){
	// For Pixel Values
	var PIXEL = /^\d+(px)?$/i;
	if (PIXEL.test(value)) return parseInt(value);
	
	// For Percentage Values
	var PERCENT = /^[\d\.]+%$/i;
	if (PERCENT.test(value)){
		try{
			parentWidth = getPixelWidth(object.parentElement,(object.parentElement.currentStyle.width != "auto" ? object.parentElement.currentStyle.width : "100%"));
			value = (parseFloat(value) / 100) * parentWidth;
		}
		catch(e){
			value = (parseFloat(value) / 100) * element.document.documentElement.clientWidth;
		}
		return parseInt(value);
	}
	
	// For EM Values
	var style = object.style.left;
	var runtimeStyle = object.runtimeStyle.left;
	object.runtimeStyle.left = object.currentStyle.left;
	object.style.left = value || 0;
	value = parseInt(object.style.pixelLeft);
	object.style.left = style;
	object.runtimeStyle.left = runtimeStyle;
	
	return value;
}


/*
 * getBorderWidth & friends
 * Border width getters
 */
function getBorderWidth(sSide){
	if(element.currentStyle["border" + sSide + "Style"] == "none"){
		return 0;
	}
	var n = getPixelValue(element.currentStyle["border" + sSide + "Width"]);
	return n || 0;
}
function getBorderLeftWidth() { return getBorderWidth("Left"); }
function getBorderRightWidth() { return getBorderWidth("Right"); }
function getBorderTopWidth() { return getBorderWidth("Top"); }
function getBorderBottomWidth() { return getBorderWidth("Bottom"); }


/*
 * getPadding & friends
 * Padding width getters
 */
function getPadding(sSide) {
	var n = getPixelValue(element.currentStyle["padding" + sSide]);
	return n || 0;
}
function getPaddingLeft() { return getPadding("Left"); }
function getPaddingRight() { return getPadding("Right"); }
function getPaddingTop() { return getPadding("Top"); }
function getPaddingBottom() { return getPadding("Bottom"); }



/*
 * getBoxSizing
 * Get the box-sizing value for the current element
 */
function getBoxSizing(){
	var s = element.style;
	var cs = element.currentStyle
	if(typeof s.boxSizing != "undefined" && s.boxSizing != ""){
		return s.boxSizing;
	}
	if(typeof s["box-sizing"] != "undefined" && s["box-sizing"] != ""){
		return s["box-sizing"];
	}
	if(typeof cs.boxSizing != "undefined" && cs.boxSizing != ""){
		return cs.boxSizing;
	}
	if(typeof cs["box-sizing"] != "undefined" && cs["box-sizing"] != ""){
		return cs["box-sizing"];
	}
	return getDocumentBoxSizing();
}


/*
 * getDocumentBoxSizing
 * Get the default document box sizing (check for quirks mode)
 */
function getDocumentBoxSizing(){
	if(doc.compatMode == null || doc.compatMode == "BackCompat"){
		return "border-box";
	}
	return "content-box"
}


/*
 * setBorderBoxWidth & friends
 * Width and height setters
 */
function setBorderBoxWidth(n){
	element.runtimeStyle.width = Math.max(0, n - getBorderLeftWidth() -
		getPaddingLeft() - getPaddingRight() - getBorderRightWidth()) + "px";
}
function setBorderBoxHeight(n){
	element.runtimeStyle.height = Math.max(0, n - getBorderTopWidth() -
		getPaddingTop() - getPaddingBottom() - getBorderBottomWidth()) + "px";
}
function setContentBoxWidth(n){
	element.runtimeStyle.width = Math.max(0, n + getBorderLeftWidth() +
		getPaddingLeft() + getPaddingRight() + getBorderRightWidth()) + "px";
}
function setContentBoxHeight(n){
	element.runtimeStyle.height = Math.max(0, n + getBorderTopWidth() +
		getPaddingTop() + getPaddingBottom() + getBorderBottomWidth()) + "px";
}


/*
 * updateBorderBoxWidth & updateBorderBoxHeight
 * 
 */
function updateBorderBoxWidth() {
	if(getDocumentBoxSizing() == getBoxSizing()){
		return;
	}
	var csw = element.currentStyle.width;
	if(csw != "auto"){
		csw = getPixelWidth(element,csw);
		if(getBoxSizing() == "border-box"){
			setBorderBoxWidth(parseInt(csw));
		}
		else{
			setContentBoxWidth(parseInt(csw));
		}
	}
}

function updateBorderBoxHeight() {
	if(getDocumentBoxSizing() == getBoxSizing()){
		return;
	}
	var csh = element.currentStyle.height;
	if(csh != "auto"){
		csh = getPixelValue(csh);
		if(getBoxSizing() == "border-box"){
			setBorderBoxHeight(parseInt(csh));
		}
		else{
			setContentBoxHeight(parseInt(csh));
		}
	}
}


// Run the calculations
init();


//]]>
</script>
</component>
=======
<component lightWeight="true">
<attach event="onpropertychange" onevent="checkPropertyChange()" />
<attach event="ondetach" onevent="restore()" />
<attach event="onresize" for="window" onevent="restore();init()" />
<script>
//<![CDATA[

var viewportwidth = (typeof window.innerWidth != 'undefined' ? window.innerWidth : element.document.documentElement.clientWidth);
// Shortcut for the document object
var doc = element.document;
//doc.body.style.width = viewportwidth;

/*
* init gets called once at the start and then never again, 
* triggers box-sizing calculations and updates width and height
*/
function init(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		updateBorderBoxWidth();
		updateBorderBoxHeight();
	}
}

/*
* restore gets called when the behavior is being detached (see event binding at the top),
* resets everything like it was before applying the behavior
*/
function restore(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		element.runtimeStyle.width = "";
		element.runtimeStyle.height = "";
	}
}

/*
* checkPropertyChange gets called as soon as an element property changes 
* (see event binding at the top), it then checks if any property influencing its 
* dimensions was changed and if yes recalculates width and height 
*/
function checkPropertyChange(){
	// check for IE8+
	if(typeof(element.style.boxSizing) == "undefined"){
		var pn = event.propertyName;
		var undef;
		if(pn == "style.boxSizing" && element.style.boxSizing == ""){
			element.style.removeAttribute("boxSizing");
			element.runtimeStyle.boxSizing = undef;
		}
		switch (pn){
			case "style.width":
			case "style.borderLeftWidth":
			case "style.borderLeftStyle":
			case "style.borderRightWidth":
			case "style.borderRightStyle":
			case "style.paddingLeft":
			case "style.paddingRight":
				updateBorderBoxWidth();
			break;
		
			case "style.height":
			case "style.borderTopWidth":
			case "style.borderTopStyle":
			case "style.borderBottomWidth":
			case "style.borderBottomStyle":
			case "style.paddingTop":
			case "style.paddingBottom":
				updateBorderBoxHeight();
			break;
		
			case "className":
			case "style.boxSizing":
				updateBorderBoxWidth();
				updateBorderBoxHeight();
			break;
		}
	}
}

/* 
 * Helper function, taken from Dean Edward's IE7 framework,
 * added by Schepp on 12.06.2010.
 * http://code.google.com/p/ie7-js/
 * MIT License (http://www.opensource.org/licenses/mit-license.php)
 *
 * Allows us to convert from relative to pixel-values.
 *
 * Citing Dean himself:
 * "MSIE6+ has special pixelLeft/Width/Height etc properties. 
 * They represent the current pixel value of the equivalent style setting. 
 * So, if you have style.width=8em then style.pixelWidth would return the 
 * pixel equivalent. MSIE also supports an override style called runtimeStyle. 
 * Setting properties on runtimeStyle overrides all other style properties.
 *
 * This trick works by setting style.left and then getting MSIE to convert 
 * it by calling style.pixelLeft. To stop the element moving around the screen 
 * when we do this, we set runtimeStyle.left with the current left value. 
 * After we’ve done the conversion we set everything back to the way it was.
 *
 * http://ajaxian.com/archives/computed-vs-cascaded-style
 */
function getPixelValue(value){
	var PIXEL = /^\d+(px)?$/i;
	if (PIXEL.test(value)) return parseInt(value);
	var style = element.style.left;
	var runtimeStyle = element.runtimeStyle.left;
	element.runtimeStyle.left = element.currentStyle.left;
	element.style.left = value || 0;
	value = parseInt(element.style.pixelLeft);
	element.style.left = style;
	element.runtimeStyle.left = runtimeStyle;
	
	return value;
}

function getPixelWidth(object, value){
	// For Pixel Values
	var PIXEL = /^\d+(px)?$/i;
	if (PIXEL.test(value)) return parseInt(value);
	
	// For Percentage Values
	var PERCENT = /^[\d\.]+%$/i;
	if (PERCENT.test(value)){
		try{
			parentWidth = getPixelWidth(object.parentElement,(object.parentElement.currentStyle.width != "auto" ? object.parentElement.currentStyle.width : "100%"));
			value = (parseFloat(value) / 100) * parentWidth;
		}
		catch(e){
			value = (parseFloat(value) / 100) * element.document.documentElement.clientWidth;
		}
		return parseInt(value);
	}
	
	// For EM Values
	var style = object.style.left;
	var runtimeStyle = object.runtimeStyle.left;
	object.runtimeStyle.left = object.currentStyle.left;
	object.style.left = value || 0;
	value = parseInt(object.style.pixelLeft);
	object.style.left = style;
	object.runtimeStyle.left = runtimeStyle;
	
	return value;
}


/*
 * getBorderWidth & friends
 * Border width getters
 */
function getBorderWidth(sSide){
	if(element.currentStyle["border" + sSide + "Style"] == "none"){
		return 0;
	}
	var n = getPixelValue(element.currentStyle["border" + sSide + "Width"]);
	return n || 0;
}
function getBorderLeftWidth() { return getBorderWidth("Left"); }
function getBorderRightWidth() { return getBorderWidth("Right"); }
function getBorderTopWidth() { return getBorderWidth("Top"); }
function getBorderBottomWidth() { return getBorderWidth("Bottom"); }


/*
 * getPadding & friends
 * Padding width getters
 */
function getPadding(sSide) {
	var n = getPixelValue(element.currentStyle["padding" + sSide]);
	return n || 0;
}
function getPaddingLeft() { return getPadding("Left"); }
function getPaddingRight() { return getPadding("Right"); }
function getPaddingTop() { return getPadding("Top"); }
function getPaddingBottom() { return getPadding("Bottom"); }



/*
 * getBoxSizing
 * Get the box-sizing value for the current element
 */
function getBoxSizing(){
	var s = element.style;
	var cs = element.currentStyle
	if(typeof s.boxSizing != "undefined" && s.boxSizing != ""){
		return s.boxSizing;
	}
	if(typeof s["box-sizing"] != "undefined" && s["box-sizing"] != ""){
		return s["box-sizing"];
	}
	if(typeof cs.boxSizing != "undefined" && cs.boxSizing != ""){
		return cs.boxSizing;
	}
	if(typeof cs["box-sizing"] != "undefined" && cs["box-sizing"] != ""){
		return cs["box-sizing"];
	}
	return getDocumentBoxSizing();
}


/*
 * getDocumentBoxSizing
 * Get the default document box sizing (check for quirks mode)
 */
function getDocumentBoxSizing(){
	if(doc.compatMode == null || doc.compatMode == "BackCompat"){
		return "border-box";
	}
	return "content-box"
}


/*
 * setBorderBoxWidth & friends
 * Width and height setters
 */
function setBorderBoxWidth(n){
	element.runtimeStyle.width = Math.max(0, n - getBorderLeftWidth() -
		getPaddingLeft() - getPaddingRight() - getBorderRightWidth()) + "px";
}
function setBorderBoxHeight(n){
	element.runtimeStyle.height = Math.max(0, n - getBorderTopWidth() -
		getPaddingTop() - getPaddingBottom() - getBorderBottomWidth()) + "px";
}
function setContentBoxWidth(n){
	element.runtimeStyle.width = Math.max(0, n + getBorderLeftWidth() +
		getPaddingLeft() + getPaddingRight() + getBorderRightWidth()) + "px";
}
function setContentBoxHeight(n){
	element.runtimeStyle.height = Math.max(0, n + getBorderTopWidth() +
		getPaddingTop() + getPaddingBottom() + getBorderBottomWidth()) + "px";
}


/*
 * updateBorderBoxWidth & updateBorderBoxHeight
 * 
 */
function updateBorderBoxWidth() {
	if(getDocumentBoxSizing() == getBoxSizing()){
		return;
	}
	var csw = element.currentStyle.width;
	if(csw != "auto"){
		csw = getPixelWidth(element,csw);
		if(getBoxSizing() == "border-box"){
			setBorderBoxWidth(parseInt(csw));
		}
		else{
			setContentBoxWidth(parseInt(csw));
		}
	}
}

function updateBorderBoxHeight() {
	if(getDocumentBoxSizing() == getBoxSizing()){
		return;
	}
	var csh = element.currentStyle.height;
	if(csh != "auto"){
		csh = getPixelValue(csh);
		if(getBoxSizing() == "border-box"){
			setBorderBoxHeight(parseInt(csh));
		}
		else{
			setContentBoxHeight(parseInt(csh));
		}
	}
}


// Run the calculations
init();


//]]>
</script>
</component>