/**
* box-sizing Polyfill
* 
* A polyfill for box-sizing: border-box for IE6 & IE7.
* 
* JScript
* 
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published 
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* 
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
* 
* See <http://www.gnu.org/licenses/lgpl-3.0.txt>
* 
* @category  JScript 
* @package   box-sizing-polyfill
* @author    Christian Schepp Schaefer <schaepp@gmx.de> <http://twitter.com/derSchepp>
* @copyright 2012 Christian Schepp Schaefer
* @license   http://www.gnu.org/copyleft/lesser.html The GNU LESSER GENERAL PUBLIC LICENSE, Version 3.0
* @link      http://github.com/Schepp/box-sizing-polyfill 
*
* PREFACE:
*
* This box-sizing polyfill is based on previous work done by Erik Arvidsson, 
* which he published in 2002 on http://webfx.eae.net/dhtml/boxsizing/boxsizing.html.
*
* USAGE:
*         
* Add the behavior/HTC after every `box-sizing: border-box;` that you assign:
* 
* box-sizing: border-box;
* *behavior: url(/scripts/boxsizing.htc);`
* 
* Prefix the `behavior` property with a star, like seen above, so it will only be seen by 
* IE6 & IE7, not by IE8+ who already implement box-sizing.
*
* The URL to the HTC file must be relative to your HTML(!) document, not relative to your CSS.
* That's why I'd advise you to use absolute paths like in the example.
*
*/
<component lightWeight="true">
<attach event="onpropertychange" onevent="checkPropertyChange()" />
<attach event="ondetach" onevent="restore()" />
<attach event="onresize" for="window" onevent="update()" />
<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;

// Buffer for multiple resize events
var resizetimeout = null;

// Don't apply box-sizing to certain elements
var apply = false;
switch(element.nodeName){
        case '#comment':
        case 'HTML':
        case 'HEAD':
        case 'TITLE':
        case 'SCRIPT':
        case 'STYLE':
        case 'LINK':
        case 'META':
        break;
                        
        default:
                apply = true;
        break;
}

/*
* update gets called during resize events, then waits until there are no further resize events, and finally triggers a recalculation
*/
function update(){
        if(resizetimeout !== null){
                window.clearTimeout(resizetimeout);
        }
        resizetimeout = window.setTimeout(function(){
                try{
                        restore();
                        init();
                }
                catch(e){}
                resizetimeout = null;
        },100);
}

/*
* 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(){
        if(apply){
                try{
                        element.runtimeStyle.removeAttribute("width");
                        element.runtimeStyle.removeAttribute("height");
                }
                catch(e){}
        }
}

/*
* init gets called once at the start and then never again, 
* triggers box-sizing calculations and updates width and height
*/
function init(){
        if(apply){
                updateBorderBoxWidth();
                updateBorderBoxHeight();
        }
}

/*
* 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(){
        if(apply){
                var pn = event.propertyName;
                if(pn === "style.boxSizing" && element.style.boxSizing === ""){
                        element.style.removeAttribute("boxSizing");
                        element.runtimeStyle.removeAttribute("boxSizing");
                        element.runtimeStyle.removeAttribute("width");
                        element.runtimeStyle.removeAttribute("height");
                }
                switch (pn){
                        case "style.width":
                        case "style.minWidth":
                        case "style.maxWidth":
                        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.minHeight":
                        case "style.maxHeight":
                        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/
 *
 * Allows us to convert from relative to pixel-values.
 */
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{
                        var parentPaddingLeft = getPixelWidth(object.parentElement,object.parentElement.currentStyle.paddingLeft);
                        var parentPaddingRight = getPixelWidth(object.parentElement,object.parentElement.currentStyle.paddingRight);
                        var parentBorderLeft = getPixelWidth(object.parentElement,object.parentElement.currentStyle.borderLeft);
                        var parentBorderRight = getPixelWidth(object.parentElement,object.parentElement.currentStyle.borderRight);
                        
                        //var parentWidth = getPixelWidth(object.parentElement,(object.parentElement.currentStyle.width != "auto" ? object.parentElement.currentStyle.width : "100%"));
                        var parentWidth = object.parentElement.offsetWidth - parentPaddingLeft - parentPaddingRight - parentBorderLeft - parentBorderRight;
                        var value = (parseFloat(value) / 100) * parentWidth;
                }
                catch(e){
                        var 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;
}

function getPixelHeight(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{
                        if(object.parentElement.currentStyle.height != "auto"){
                                switch(object.parentElement.nodeName){
                                        default:
                                                if(object.parentElement.currentStyle.height !== "auto"){
                                                        var parentPaddingTop = getPixelWidth(object.parentElement,object.parentElement.currentStyle.paddingTop);
                                                        var parentPaddingBottom = getPixelWidth(object.parentElement,object.parentElement.currentStyle.paddingBottom);
                                                        var parentBorderTop = getPixelWidth(object.parentElement,object.parentElement.currentStyle.borderTop);
                                                        var parentBorderBottom = getPixelWidth(object.parentElement,object.parentElement.currentStyle.borderBottom);
                                                        
                                                        var parentHeight = object.parentElement.offsetHeight - parentPaddingTop - parentPaddingBottom - parentBorderTop - parentBorderBottom;
                                                        //var parentHeight = getPixelHeight(object.parentElement,object.parentElement.currentStyle.height);

                                                        value = (parseFloat(value) / 100) * parentHeight;
                                                }
                                                else {
                                                        value = "auto";
                                                }
                                        break;
                                        
                                        case 'HTML':
                                                parentHeight = element.document.documentElement.clientHeight;
                                                if(parentHeight !== "auto"){
                                                        value = (parseFloat(value) / 100) * parentHeight;
                                                }
                                                else {
                                                        value = "auto";
                                                }
                                        break;
                                }
                                if(value !== "auto") value = parseInt(value);
                        }
                        else {
                                value = "auto";
                        }
                }
                catch(e){
                        value = "auto";
                }
                return 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 setBorderBoxMinWidth(n){
        element.runtimeStyle.minWidth = Math.max(0, n - getBorderLeftWidth() -
                getPaddingLeft() - getPaddingRight() - getBorderRightWidth()) + "px";
}
function setBorderBoxMaxWidth(n){
        element.runtimeStyle.maxWidth = 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 setBorderBoxMinHeight(n){
        element.runtimeStyle.minHeight = Math.max(0, n - getBorderTopWidth() -
                getPaddingTop() - getPaddingBottom() - getBorderBottomWidth()) + "px";
}
function setBorderBoxMaxHeight(n){
        element.runtimeStyle.maxHeight = 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 setContentBoxMinWidth(n){
        element.runtimeStyle.minWidth = Math.max(0, n + getBorderLeftWidth() +
                getPaddingLeft() + getPaddingRight() + getBorderRightWidth()) + "px";
}
function setContentBoxMaxWidth(n){
        element.runtimeStyle.maxWidth = Math.max(0, n + getBorderLeftWidth() +
                getPaddingLeft() + getPaddingRight() + getBorderRightWidth()) + "px";
}
function setContentBoxHeight(n){
        element.runtimeStyle.height = Math.max(0, n + getBorderTopWidth() +
                getPaddingTop() + getPaddingBottom() + getBorderBottomWidth()) + "px";
}
function setContentBoxMinHeight(n){
        element.runtimeStyle.minHeight = Math.max(0, n + getBorderTopWidth() +
                getPaddingTop() + getPaddingBottom() + getBorderBottomWidth()) + "px";
}
function setContentBoxMaxHeight(n){
        element.runtimeStyle.maxHeight = 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));
                }
        }

        csw = element.currentStyle.minWidth;
        if(csw != "none"){
                csw = getPixelWidth(element,csw);
                if(getBoxSizing() == "border-box"){
                        setBorderBoxMinWidth(parseInt(csw));
                }
                else{
                        setContentBoxMinWidth(parseInt(csw));
                }
        }

        csw = element.currentStyle.maxWidth;
        if(csw != "none"){
                csw = getPixelWidth(element,csw);
                if(getBoxSizing() == "border-box"){
                        setBorderBoxMaxWidth(parseInt(csw));
                }
                else{
                        setContentBoxMaxWidth(parseInt(csw));
                }
        }
}

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

        csh = element.currentStyle.minHeight;
        if(csh != "none"){
                csh = getPixelHeight(element,csh);
                if(csh !== "none"){
                        if(getBoxSizing() == "border-box"){
                                setBorderBoxMinHeight(parseInt(csh));
                        }
                        else{
                                setContentBoxMinHeight(parseInt(csh));
                        }
                }
        }

        csh = element.currentStyle.maxHeight;
        if(csh != "none"){
                csh = getPixelHeight(element,csh);
                if(csh !== "none"){
                        if(getBoxSizing() == "border-box"){
                                setBorderBoxMaxHeight(parseInt(csh));
                        }
                        else{
                                setContentBoxMaxHeight(parseInt(csh));
                        }
                }
        }
}


// Run the calculations
init();

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