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#19070697 공통 자바스크립트 최적화
git-svn-id: http://xe-core.googlecode.com/svn/sandbox@7627 201d5d3c-b55e-5fd7-737f-ddc643e51545
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taggon
parent
08db5dc391
commit
7aba69a032
13 changed files with 3198 additions and 2788 deletions
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@ -3,171 +3,20 @@
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// This is licensed under the GNU LGPL, version 2.1 or later.
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// For details, see: http://creativecommons.org/licenses/LGPL/2.1/
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var IEPNGFix = window.IEPNGFix || {};
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IEPNGFix.tileBG = function(elm, pngSrc, ready) {
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// Params: A reference to a DOM element, the PNG src file pathname, and a
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// hidden "ready-to-run" passed when called back after image preloading.
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var data = this.data[elm.uniqueID],
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elmW = Math.max(elm.clientWidth, elm.scrollWidth),
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elmH = Math.max(elm.clientHeight, elm.scrollHeight),
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bgX = elm.currentStyle.backgroundPositionX,
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bgY = elm.currentStyle.backgroundPositionY,
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bgR = elm.currentStyle.backgroundRepeat;
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// Cache of DIVs created per element, and image preloader/data.
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if (!data.tiles) {
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data.tiles = {
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elm: elm,
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src: '',
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cache: [],
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img: new Image(),
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old: {}
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};
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}
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var tiles = data.tiles,
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pngW = tiles.img.width,
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pngH = tiles.img.height;
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if (pngSrc) {
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if (!ready && pngSrc != tiles.src) {
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// New image? Preload it with a callback to detect dimensions.
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tiles.img.onload = function() {
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this.onload = null;
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IEPNGFix.tileBG(elm, pngSrc, 1);
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};
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return tiles.img.src = pngSrc;
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}
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} else {
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// No image?
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if (tiles.src) ready = 1;
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pngW = pngH = 0;
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}
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tiles.src = pngSrc;
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if (!ready && elmW == tiles.old.w && elmH == tiles.old.h &&
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bgX == tiles.old.x && bgY == tiles.old.y && bgR == tiles.old.r) {
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return;
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}
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// Convert English and percentage positions to pixels.
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var pos = {
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top: '0%',
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left: '0%',
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center: '50%',
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bottom: '100%',
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right: '100%'
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},
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x,
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y,
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pc;
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x = pos[bgX] || bgX;
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y = pos[bgY] || bgY;
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if (pc = x.match(/(\d+)%/)) {
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x = Math.round((elmW - pngW) * (parseInt(pc[1]) / 100));
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}
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if (pc = y.match(/(\d+)%/)) {
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y = Math.round((elmH - pngH) * (parseInt(pc[1]) / 100));
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}
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x = parseInt(x);
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y = parseInt(y);
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// Handle backgroundRepeat.
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var repeatX = { 'repeat': 1, 'repeat-x': 1 }[bgR],
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repeatY = { 'repeat': 1, 'repeat-y': 1 }[bgR];
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if (repeatX) {
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x %= pngW;
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if (x > 0) x -= pngW;
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}
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if (repeatY) {
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y %= pngH;
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if (y > 0) y -= pngH;
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}
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// Go!
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this.hook.enabled = 0;
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if (!({ relative: 1, absolute: 1 }[elm.currentStyle.position])) {
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elm.style.position = 'relative';
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}
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var count = 0,
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xPos,
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maxX = repeatX ? elmW : x + 0.1,
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yPos,
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maxY = repeatY ? elmH : y + 0.1,
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d,
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s,
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isNew;
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if (pngW && pngH) {
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for (xPos = x; xPos < maxX; xPos += pngW) {
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for (yPos = y; yPos < maxY; yPos += pngH) {
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isNew = 0;
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if (!tiles.cache[count]) {
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tiles.cache[count] = document.createElement('div');
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isNew = 1;
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}
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var clipR = (xPos + pngW > elmW ? elmW - xPos : pngW),
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clipB = (yPos + pngH > elmH ? elmH - yPos : pngH);
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d = tiles.cache[count];
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s = d.style;
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s.behavior = 'none';
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s.left = xPos + 'px';
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s.top = yPos + 'px';
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s.width = clipR + 'px';
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s.height = clipB + 'px';
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s.clip = 'rect(' +
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(yPos < 0 ? 0 - yPos : 0) + 'px,' +
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clipR + 'px,' +
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clipB + 'px,' +
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(xPos < 0 ? 0 - xPos : 0) + 'px)';
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s.display = 'block';
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if (isNew) {
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s.position = 'absolute';
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s.zIndex = -999;
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if (elm.firstChild) {
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elm.insertBefore(d, elm.firstChild);
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} else {
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elm.appendChild(d);
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}
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}
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this.fix(d, pngSrc, 0);
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count++;
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}
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}
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}
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while (count < tiles.cache.length) {
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this.fix(tiles.cache[count], '', 0);
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tiles.cache[count++].style.display = 'none';
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}
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this.hook.enabled = 1;
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// Cache so updates are infrequent.
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tiles.old = {
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w: elmW,
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h: elmH,
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x: bgX,
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y: bgY,
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r: bgR
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};
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};
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IEPNGFix.update = function() {
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// Update all PNG backgrounds.
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for (var i in IEPNGFix.data) {
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var t = IEPNGFix.data[i].tiles;
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if (t && t.elm && t.src) {
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IEPNGFix.tileBG(t.elm, t.src);
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}
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}
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};
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IEPNGFix.update.timer = 0;
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if (window.attachEvent && !window.opera) {
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window.attachEvent('onresize', function() {
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clearTimeout(IEPNGFix.update.timer);
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IEPNGFix.update.timer = setTimeout(IEPNGFix.update, 100);
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});
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}
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var IEPNGFix=window.IEPNGFix||{};IEPNGFix.tileBG=function(elm,pngSrc,ready){var data=this.data[elm.uniqueID],elmW=Math.max(elm.clientWidth,elm.scrollWidth),elmH=Math.max(elm.clientHeight,elm.scrollHeight),bgX=elm.currentStyle.backgroundPositionX,bgY=elm.currentStyle.backgroundPositionY,bgR=elm.currentStyle.backgroundRepeat;if(!data.tiles){data.tiles={elm:elm,src:'',cache:[],img:new Image(),old:{}};}
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var tiles=data.tiles,pngW=tiles.img.width,pngH=tiles.img.height;if(pngSrc){if(!ready&&pngSrc!=tiles.src){tiles.img.onload=function(){this.onload=null;IEPNGFix.tileBG(elm,pngSrc,1);};return tiles.img.src=pngSrc;}}else{if(tiles.src)ready=1;pngW=pngH=0;}
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tiles.src=pngSrc;if(!ready&&elmW==tiles.old.w&&elmH==tiles.old.h&&bgX==tiles.old.x&&bgY==tiles.old.y&&bgR==tiles.old.r){return;}
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var pos={top:'0%',left:'0%',center:'50%',bottom:'100%',right:'100%'},x,y,pc;x=pos[bgX]||bgX;y=pos[bgY]||bgY;if(pc=x.match(/(\d+)%/)){x=Math.round((elmW-pngW)*(parseInt(pc[1])/100));}
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if(pc=y.match(/(\d+)%/)){y=Math.round((elmH-pngH)*(parseInt(pc[1])/100));}
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x=parseInt(x);y=parseInt(y);var repeatX={'repeat':1,'repeat-x':1}[bgR],repeatY={'repeat':1,'repeat-y':1}[bgR];if(repeatX){x%=pngW;if(x>0)x-=pngW;}
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if(repeatY){y%=pngH;if(y>0)y-=pngH;}
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this.hook.enabled=0;if(!({relative:1,absolute:1}[elm.currentStyle.position])){elm.style.position='relative';}
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var count=0,xPos,maxX=repeatX?elmW:x+0.1,yPos,maxY=repeatY?elmH:y+0.1,d,s,isNew;if(pngW&&pngH){for(xPos=x;xPos<maxX;xPos+=pngW){for(yPos=y;yPos<maxY;yPos+=pngH){isNew=0;if(!tiles.cache[count]){tiles.cache[count]=document.createElement('div');isNew=1;}
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var clipR=(xPos+pngW>elmW?elmW-xPos:pngW),clipB=(yPos+pngH>elmH?elmH-yPos:pngH);d=tiles.cache[count];s=d.style;s.behavior='none';s.left=xPos+'px';s.top=yPos+'px';s.width=clipR+'px';s.height=clipB+'px';s.clip='rect('+
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(yPos<0?0-yPos:0)+'px,'+
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clipR+'px,'+
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clipB+'px,'+
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(xPos<0?0-xPos:0)+'px)';s.display='block';if(isNew){s.position='absolute';s.zIndex=-999;if(elm.firstChild){elm.insertBefore(d,elm.firstChild);}else{elm.appendChild(d);}}
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this.fix(d,pngSrc,0);count++;}}}
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while(count<tiles.cache.length){this.fix(tiles.cache[count],'',0);tiles.cache[count++].style.display='none';}
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this.hook.enabled=1;tiles.old={w:elmW,h:elmH,x:bgX,y:bgY,r:bgR};};IEPNGFix.update=function(){for(var i in IEPNGFix.data){var t=IEPNGFix.data[i].tiles;if(t&&t.elm&&t.src){IEPNGFix.tileBG(t.elm,t.src);}}};IEPNGFix.update.timer=0;if(window.attachEvent&&!window.opera){window.attachEvent('onresize',function(){clearTimeout(IEPNGFix.update.timer);IEPNGFix.update.timer=setTimeout(IEPNGFix.update,100);});}
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