Mercurial Hosting > nabble
diff src/nabble/view/web/util/minmax.js @ 0:7ecd1a4ef557
add content
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 21 Mar 2019 19:15:52 -0600 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/nabble/view/web/util/minmax.js Thu Mar 21 19:15:52 2019 -0600 @@ -0,0 +1,135 @@ +// minmax.js: make IE5+/Win support CSS min/max-width/height +// version 1.0, 08-Aug-2003 +// written by Andrew Clover <and@doxdesk.com>, use freely + +/*@cc_on +@if (@_win32 && @_jscript_version>4) + +var minmax_elements; + +minmax_props= new Array( + new Array('min-width', 'minWidth'), + new Array('max-width', 'maxWidth'), + new Array('min-height','minHeight'), + new Array('max-height','maxHeight') +); + +// Binding. Called on all new elements. If <body>, initialise; check all +// elements for minmax properties + +function minmax_bind(el) { + var i, em, ms; + var st= el.style, cs= el.currentStyle; + + if (minmax_elements==window.undefined) { + // initialise when body element has turned up, but only on IE + if (!document.body || !document.body.currentStyle) return; + minmax_elements= new Array(); + window.attachEvent('onresize', minmax_delayout); + // make font size listener + em= document.createElement('div'); + em.setAttribute('id', 'minmax_em'); + em.style.position= 'absolute'; em.style.visibility= 'hidden'; + em.style.fontSize= 'xx-large'; em.style.height= '5em'; + em.style.top='-5em'; em.style.left= '0'; + if (em.style.setExpression) { + em.style.setExpression('width', 'minmax_checkFont()'); + document.body.insertBefore(em, document.body.firstChild); + } + } + + // transform hyphenated properties the browser has not caught to camelCase + for (i= minmax_props.length; i-->0;) + if (cs[minmax_props[i][0]]) + st[minmax_props[i][1]]= cs[minmax_props[i][0]]; + // add element with properties to list, store optimal size values + for (i= minmax_props.length; i-->0;) { + ms= cs[minmax_props[i][1]]; + if (ms && ms!='auto' && ms!='none' && ms!='0' && ms!='') { + st.minmaxWidth= cs.width; st.minmaxHeight= cs.height; + minmax_elements[minmax_elements.length]= el; + // will need a layout later + minmax_delayout(); + break; + } } +} + +// check for font size changes + +var minmax_fontsize= 0; +function minmax_checkFont() { + var fs= document.getElementById('minmax_em').offsetHeight; + if (minmax_fontsize!=fs && minmax_fontsize!=0) + minmax_delayout(); + minmax_fontsize= fs; + return '5em'; +} + +// Layout. Called after window and font size-change. Go through elements we +// picked out earlier and set their size to the minimum, maximum and optimum, +// choosing whichever is appropriate + +function minmax_delayout() { + minmax_layout(); +} + +function minmax_layout() { + var i, el, st, cs, optimal, inrange; + for (i= minmax_elements.length; i-->0;) { + el= minmax_elements[i]; st= el.style; cs= el.currentStyle; + + // horizontal size bounding + st.width= st.minmaxWidth; optimal= el.offsetWidth; + inrange= true; + if (inrange && cs.minWidth && cs.minWidth!='0' && cs.minWidth!='auto' && cs.minWidth!='') { + st.width= cs.minWidth; + inrange= (el.offsetWidth<optimal); + } + if (inrange && cs.maxWidth && cs.maxWidth!='none' && cs.maxWidth!='auto' && cs.maxWidth!='') { + st.width= cs.maxWidth; + inrange= (el.offsetWidth>optimal); + } + if (inrange) st.width= st.minmaxWidth; + + // vertical size bounding + st.height= st.minmaxHeight; optimal= el.offsetHeight; + inrange= true; + if (inrange && cs.minHeight && cs.minHeight!='0' && cs.minHeight!='auto' && cs.minHeight!='') { + st.height= cs.minHeight; + inrange= (el.offsetHeight<optimal); + } + if (inrange && cs.maxHeight && cs.maxHeight!='none' && cs.maxHeight!='auto' && cs.maxHeight!='') { + st.height= cs.maxHeight; + inrange= (el.offsetHeight>optimal); + } + if (inrange) st.height= st.minmaxHeight; + } +} + +// Scanning. Check document every so often until it has finished loading. Do +// nothing until <body> arrives, then call main init. Pass any new elements +// found on each scan to be bound + +var minmax_SCANDELAY= 500; + +function minmax_scan() { + var el; + for (var i= 0; i<document.all.length; i++) { + el= document.all[i]; + if (!el.minmax_bound) { + el.minmax_bound= true; + minmax_bind(el); + } } +} + +var minmax_scanner; +function minmax_stop() { + window.clearInterval(minmax_scanner); + minmax_scan(); +} + +minmax_scan(); +minmax_scanner=window.setInterval(minmax_scan, minmax_SCANDELAY); +window.attachEvent('onload', minmax_stop); + +@end @*/