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144 lines
4.4 KiB
144 lines
4.4 KiB
// minmax.js: make IE5+/Win support CSS min/max-width/height
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// version 1.0, 08-Aug-2003
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// written by Andrew Clover <and@doxdesk.com>, use freely
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/*@cc_on
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@if (@_win32 && @_jscript_version>4)
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var minmax_elements;
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minmax_props= new Array(
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new Array('min-width', 'minWidth'),
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new Array('max-width', 'maxWidth'),
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new Array('min-height','minHeight'),
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new Array('max-height','maxHeight')
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);
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// Binding. Called on all new elements. If <body>, initialise; check all
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// elements for minmax properties
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function minmax_bind(el) {
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var i, em, ms;
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var st= el.style, cs= el.currentStyle;
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if (minmax_elements==window.undefined) {
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// initialise when body element has turned up, but only on IE
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if (!document.body || !document.body.currentStyle) return;
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minmax_elements= new Array();
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window.attachEvent('onresize', minmax_delayout);
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// make font size listener
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em= document.createElement('div');
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em.setAttribute('id', 'minmax_em');
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em.style.position= 'absolute'; em.style.visibility= 'hidden';
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em.style.fontSize= 'xx-large'; em.style.height= '5em';
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em.style.top='-5em'; em.style.left= '0';
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if (em.style.setExpression) {
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em.style.setExpression('width', 'minmax_checkFont()');
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document.body.insertBefore(em, document.body.firstChild);
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}
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}
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// transform hyphenated properties the browser has not caught to camelCase
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for (i= minmax_props.length; i-->0;)
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if (cs[minmax_props[i][0]])
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st[minmax_props[i][1]]= cs[minmax_props[i][0]];
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// add element with properties to list, store optimal size values
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for (i= minmax_props.length; i-->0;) {
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ms= cs[minmax_props[i][1]];
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if (ms && ms!='auto' && ms!='none' && ms!='0' && ms!='') {
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st.minmaxWidth= cs.width; st.minmaxHeight= cs.height;
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minmax_elements[minmax_elements.length]= el;
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// will need a layout later
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minmax_delayout();
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break;
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} }
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}
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// check for font size changes
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var minmax_fontsize= 0;
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function minmax_checkFont() {
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var fs= document.getElementById('minmax_em').offsetHeight;
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if (minmax_fontsize!=fs && minmax_fontsize!=0)
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minmax_delayout();
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minmax_fontsize= fs;
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return '5em';
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}
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// Layout. Called after window and font size-change. Go through elements we
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// picked out earlier and set their size to the minimum, maximum and optimum,
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// choosing whichever is appropriate
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// Request re-layout at next available moment
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var minmax_delaying= false;
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function minmax_delayout() {
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if (minmax_delaying) return;
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minmax_delaying= true;
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window.setTimeout(minmax_layout, 0);
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}
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function minmax_stopdelaying() {
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minmax_delaying= false;
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}
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function minmax_layout() {
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window.setTimeout(minmax_stopdelaying, 100);
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var i, el, st, cs, optimal, inrange;
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for (i= minmax_elements.length; i-->0;) {
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el= minmax_elements[i]; st= el.style; cs= el.currentStyle;
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// horizontal size bounding
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st.width= st.minmaxWidth; optimal= el.offsetWidth;
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inrange= true;
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if (inrange && cs.minWidth && cs.minWidth!='0' && cs.minWidth!='auto' && cs.minWidth!='') {
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st.width= cs.minWidth;
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inrange= (el.offsetWidth<optimal);
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}
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if (inrange && cs.maxWidth && cs.maxWidth!='none' && cs.maxWidth!='auto' && cs.maxWidth!='') {
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st.width= cs.maxWidth;
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inrange= (el.offsetWidth>optimal);
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}
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if (inrange) st.width= st.minmaxWidth;
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// vertical size bounding
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st.height= st.minmaxHeight; optimal= el.offsetHeight;
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inrange= true;
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if (inrange && cs.minHeight && cs.minHeight!='0' && cs.minHeight!='auto' && cs.minHeight!='') {
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st.height= cs.minHeight;
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inrange= (el.offsetHeight<optimal);
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}
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if (inrange && cs.maxHeight && cs.maxHeight!='none' && cs.maxHeight!='auto' && cs.maxHeight!='') {
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st.height= cs.maxHeight;
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inrange= (el.offsetHeight>optimal);
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}
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if (inrange) st.height= st.minmaxHeight;
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}
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}
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// Scanning. Check document every so often until it has finished loading. Do
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// nothing until <body> arrives, then call main init. Pass any new elements
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// found on each scan to be bound
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var minmax_SCANDELAY= 500;
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function minmax_scan() {
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var el;
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for (var i= 0; i<document.all.length; i++) {
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el= document.all[i];
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if (!el.minmax_bound) {
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el.minmax_bound= true;
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minmax_bind(el);
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} }
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}
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var minmax_scanner;
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function minmax_stop() {
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window.clearInterval(minmax_scanner);
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minmax_scan();
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}
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minmax_scan();
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minmax_scanner= window.setInterval(minmax_scan, minmax_SCANDELAY);
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window.attachEvent('onload', minmax_stop);
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@end @*/
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