-// IE5.5+ PNG Alpha Fix v2.0 Alpha: Background Tiling Support\r
-// (c) 2008-2009 Angus Turnbull http://www.twinhelix.com\r
-\r
-// This is licensed under the GNU LGPL, version 2.1 or later.\r
-// For details, see: http://creativecommons.org/licenses/LGPL/2.1/\r
-\r
-var IEPNGFix = window.IEPNGFix || {};\r
-\r
-IEPNGFix.tileBG = function(elm, pngSrc, ready) {\r
- // Params: A reference to a DOM element, the PNG src file pathname, and a\r
- // hidden "ready-to-run" passed when called back after image preloading.\r
-\r
- var data = this.data[elm.uniqueID],\r
- elmW = Math.max(elm.clientWidth, elm.scrollWidth),\r
- elmH = Math.max(elm.clientHeight, elm.scrollHeight),\r
- bgX = elm.currentStyle.backgroundPositionX,\r
- bgY = elm.currentStyle.backgroundPositionY,\r
- bgR = elm.currentStyle.backgroundRepeat;\r
-\r
- // Cache of DIVs created per element, and image preloader/data.\r
- if (!data.tiles) {\r
- data.tiles = {\r
- elm: elm,\r
- src: '',\r
- cache: [],\r
- img: new Image(),\r
- old: {}\r
- };\r
- }\r
- var tiles = data.tiles,\r
- pngW = tiles.img.width,\r
- pngH = tiles.img.height;\r
-\r
- if (pngSrc) {\r
- if (!ready && pngSrc != tiles.src) {\r
- // New image? Preload it with a callback to detect dimensions.\r
- tiles.img.onload = function() {\r
- this.onload = null;\r
- IEPNGFix.tileBG(elm, pngSrc, 1);\r
- };\r
- return tiles.img.src = pngSrc;\r
- }\r
- } else {\r
- // No image?\r
- if (tiles.src) ready = 1;\r
- pngW = pngH = 0;\r
- }\r
- tiles.src = pngSrc;\r
-\r
- if (!ready && elmW == tiles.old.w && elmH == tiles.old.h &&\r
- bgX == tiles.old.x && bgY == tiles.old.y && bgR == tiles.old.r) {\r
- return;\r
- }\r
-\r
- // Convert English and percentage positions to pixels.\r
- var pos = {\r
- top: '0%',\r
- left: '0%',\r
- center: '50%',\r
- bottom: '100%',\r
- right: '100%'\r
- },\r
- x,\r
- y,\r
- pc;\r
- x = pos[bgX] || bgX;\r
- y = pos[bgY] || bgY;\r
- if (pc = x.match(/(\d+)%/)) {\r
- x = Math.round((elmW - pngW) * (parseInt(pc[1]) / 100));\r
- }\r
- if (pc = y.match(/(\d+)%/)) {\r
- y = Math.round((elmH - pngH) * (parseInt(pc[1]) / 100));\r
- }\r
- x = parseInt(x);\r
- y = parseInt(y);\r
-\r
- // Handle backgroundRepeat.\r
- var repeatX = { 'repeat': 1, 'repeat-x': 1 }[bgR],\r
- repeatY = { 'repeat': 1, 'repeat-y': 1 }[bgR];\r
- if (repeatX) {\r
- x %= pngW;\r
- if (x > 0) x -= pngW;\r
- }\r
- if (repeatY) {\r
- y %= pngH;\r
- if (y > 0) y -= pngH;\r
- }\r
-\r
- // Go!\r
- this.hook.enabled = 0;\r
- if (!({ relative: 1, absolute: 1 }[elm.currentStyle.position])) {\r
- elm.style.position = 'relative';\r
- }\r
- var count = 0,\r
- xPos,\r
- maxX = repeatX ? elmW : x + 0.1,\r
- yPos,\r
- maxY = repeatY ? elmH : y + 0.1,\r
- d,\r
- s,\r
- isNew;\r
- if (pngW && pngH) {\r
- for (xPos = x; xPos < maxX; xPos += pngW) {\r
- for (yPos = y; yPos < maxY; yPos += pngH) {\r
- isNew = 0;\r
- if (!tiles.cache[count]) {\r
- tiles.cache[count] = document.createElement('div');\r
- isNew = 1;\r
- }\r
- var clipR = Math.max(0, xPos + pngW > elmW ? elmW - xPos : pngW),\r
- clipB = Math.max(0, yPos + pngH > elmH ? elmH - yPos : pngH);\r
- d = tiles.cache[count];\r
- s = d.style;\r
- s.behavior = 'none';\r
- s.left = (xPos - parseInt(elm.currentStyle.paddingLeft)) + 'px';\r
- s.top = yPos + 'px';\r
- s.width = clipR + 'px';\r
- s.height = clipB + 'px';\r
- s.clip = 'rect(' +\r
- (yPos < 0 ? 0 - yPos : 0) + 'px,' +\r
- clipR + 'px,' +\r
- clipB + 'px,' +\r
- (xPos < 0 ? 0 - xPos : 0) + 'px)';\r
- s.display = 'block';\r
- if (isNew) {\r
- s.position = 'absolute';\r
- s.zIndex = -999;\r
- if (elm.firstChild) {\r
- elm.insertBefore(d, elm.firstChild);\r
- } else {\r
- elm.appendChild(d);\r
- }\r
- }\r
- this.fix(d, pngSrc, 0);\r
- count++;\r
- }\r
- }\r
- }\r
- while (count < tiles.cache.length) {\r
- this.fix(tiles.cache[count], '', 0);\r
- tiles.cache[count++].style.display = 'none';\r
- }\r
-\r
- this.hook.enabled = 1;\r
-\r
- // Cache so updates are infrequent.\r
- tiles.old = {\r
- w: elmW,\r
- h: elmH,\r
- x: bgX,\r
- y: bgY,\r
- r: bgR\r
- };\r
-};\r
-\r
-\r
-IEPNGFix.update = function() {\r
- // Update all PNG backgrounds.\r
- for (var i in IEPNGFix.data) {\r
- var t = IEPNGFix.data[i].tiles;\r
- if (t && t.elm && t.src) {\r
- IEPNGFix.tileBG(t.elm, t.src);\r
- }\r
- }\r
-};\r
-IEPNGFix.update.timer = 0;\r
-\r
-if (window.attachEvent && !window.opera) {\r
- window.attachEvent('onresize', function() {\r
- clearTimeout(IEPNGFix.update.timer);\r
- IEPNGFix.update.timer = setTimeout(IEPNGFix.update, 100);\r
- });\r
-}\r
+// IE5.5+ PNG Alpha Fix v2.0 Alpha: Background Tiling Support
+// (c) 2008-2009 Angus Turnbull http://www.twinhelix.com
+
+// This is licensed under the GNU LGPL, version 2.1 or later.
+// For details, see: http://creativecommons.org/licenses/LGPL/2.1/
+
+var IEPNGFix = window.IEPNGFix || {};
+
+IEPNGFix.tileBG = function(elm, pngSrc, ready) {
+ // Params: A reference to a DOM element, the PNG src file pathname, and a
+ // hidden "ready-to-run" passed when called back after image preloading.
+
+ 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;
+
+ // Cache of DIVs created per element, and image preloader/data.
+ if (!data.tiles) {
+ data.tiles = {
+ elm: elm,
+ src: '',
+ cache: [],
+ img: new Image(),
+ old: {}
+ };
+ }
+ var tiles = data.tiles,
+ pngW = tiles.img.width,
+ pngH = tiles.img.height;
+
+ if (pngSrc) {
+ if (!ready && pngSrc != tiles.src) {
+ // New image? Preload it with a callback to detect dimensions.
+ tiles.img.onload = function() {
+ this.onload = null;
+ IEPNGFix.tileBG(elm, pngSrc, 1);
+ };
+ return tiles.img.src = pngSrc;
+ }
+ } else {
+ // No image?
+ if (tiles.src) ready = 1;
+ pngW = pngH = 0;
+ }
+ 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;
+ }
+
+ // Convert English and percentage positions to pixels.
+ 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));
+ }
+ if (pc = y.match(/(\d+)%/)) {
+ y = Math.round((elmH - pngH) * (parseInt(pc[1]) / 100));
+ }
+ x = parseInt(x);
+ y = parseInt(y);
+
+ // Handle backgroundRepeat.
+ var repeatX = { 'repeat': 1, 'repeat-x': 1 }[bgR],
+ repeatY = { 'repeat': 1, 'repeat-y': 1 }[bgR];
+ if (repeatX) {
+ x %= pngW;
+ if (x > 0) x -= pngW;
+ }
+ if (repeatY) {
+ y %= pngH;
+ if (y > 0) y -= pngH;
+ }
+
+ // Go!
+ this.hook.enabled = 0;
+ if (!({ relative: 1, absolute: 1 }[elm.currentStyle.position])) {
+ elm.style.position = 'relative';
+ }
+ 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;
+ }
+ var clipR = Math.max(0, xPos + pngW > elmW ? elmW - xPos : pngW),
+ clipB = Math.max(0, yPos + pngH > elmH ? elmH - yPos : pngH);
+ d = tiles.cache[count];
+ s = d.style;
+ s.behavior = 'none';
+ s.left = (xPos - parseInt(elm.currentStyle.paddingLeft)) + 'px';
+ s.top = yPos + 'px';
+ s.width = clipR + 'px';
+ s.height = clipB + 'px';
+ s.clip = 'rect(' +
+ (yPos < 0 ? 0 - yPos : 0) + 'px,' +
+ clipR + 'px,' +
+ clipB + 'px,' +
+ (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);
+ }
+ }
+ this.fix(d, pngSrc, 0);
+ count++;
+ }
+ }
+ }
+ while (count < tiles.cache.length) {
+ this.fix(tiles.cache[count], '', 0);
+ tiles.cache[count++].style.display = 'none';
+ }
+
+ this.hook.enabled = 1;
+
+ // Cache so updates are infrequent.
+ tiles.old = {
+ w: elmW,
+ h: elmH,
+ x: bgX,
+ y: bgY,
+ r: bgR
+ };
+};
+
+
+IEPNGFix.update = function() {
+ // Update all PNG backgrounds.
+ 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);
+ });
+}
projects / osqa.git / blobdiff