diff options
Diffstat (limited to 'website/logi/iepngfix_tilebg.js')
-rwxr-xr-x | website/logi/iepngfix_tilebg.js | 356 |
1 files changed, 178 insertions, 178 deletions
diff --git a/website/logi/iepngfix_tilebg.js b/website/logi/iepngfix_tilebg.js index 32edc205..48795631 100755 --- a/website/logi/iepngfix_tilebg.js +++ b/website/logi/iepngfix_tilebg.js @@ -1,178 +1,178 @@ -// IE5.5+ PNG Alpha Fix v2.0 Alpha: Background Tiling Support
-// (c) 2008 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;
- try {
- 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;
- } catch ( e ) {
- return;
- }
-
- // 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 = (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(' +
- (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);
- });
-}
+// IE5.5+ PNG Alpha Fix v2.0 Alpha: Background Tiling Support +// (c) 2008 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; + try { + 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; + } catch ( e ) { + return; + } + + // 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 = (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(' + + (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); + }); +} |