extjs/welcome/css/iepngfix.htc

   1 <public:component>
   2 <script type="text/javascript">
   3
   4 // IE5.5+ PNG Alpha Fix v2.0 Alpha
   5 // (c) 2004-2009 Angus Turnbull http://www.twinhelix.com
   6
   7 // This is licensed under the GNU LGPL, version 2.1 or later.
   8 // For details, see: http://creativecommons.org/licenses/LGPL/2.1/
   9
  10 var IEPNGFix = window.IEPNGFix || {};
  11 IEPNGFix.data = IEPNGFix.data || {};
  12
  13
  14 // CONFIG: blankImg is the path to blank.gif, *relative to the HTML document*.
  15 // Try either:
  16 // * An absolute path like:  '/images/blank.gif'
  17 // * A path relative to this HTC file like:  thisFolder + 'blank.gif'
  18 var thisFolder = document.URL.replace(/(\\|\/)[^\\\/]*$/, '/');
  19 //IEPNGFix.blankImg = thisFolder + 'blank.gif';
  20 IEPNGFix.blankImg = '/css/blank.gif';
  21
  22
  23 IEPNGFix.fix = function(elm, src, t) {
  24         // Applies an image 'src' to an element 'elm' using the DirectX filter.
  25         // If 'src' is null, filter is disabled.
  26         // Disables the 'hook' to prevent infinite recursion on setting BG/src.
  27         // 't' = type, where background tile = 0, background = 1, IMG SRC = 2.
  28
  29         var h = this.hook.enabled;
  30         this.hook.enabled = 0;
  31
  32         var f = 'DXImageTransform.Microsoft.AlphaImageLoader';
  33                 src = (src || '').replace(/\(/g, '%28').replace(/\)/g, '%29');
  34
  35         if (
  36                 src && !(/IMG|INPUT/.test(elm.nodeName) && (t != 2)) &&
  37                 elm.currentStyle.width == 'auto' && elm.currentStyle.height == 'auto'
  38         ) {
  39                 if (elm.offsetWidth) {
  40                         elm.style.width = elm.offsetWidth + 'px';
  41                 }
  42                 if (elm.clientHeight) {
  43                         elm.style.height = elm.clientHeight + 'px';
  44                 }
  45                 if (elm.currentStyle.display == 'inline') {
  46                         elm.style.display = 'inline-block';
  47                 }
  48         }
  49
  50         if (t == 1) {
  51                 elm.style.backgroundImage = 'url("' + this.blankImg + '")';
  52         }
  53         if (t == 2) {
  54                 elm.src = this.blankImg;
  55         }
  56
  57         if (elm.filters[f]) {
  58                 elm.filters[f].enabled = src ? true : false;
  59                 if (src) {
  60                         elm.filters[f].src = src;
  61                 }
  62         } else if (src) {
  63                 elm.style.filter = 'progid:' + f + '(src="' + src +
  64                         '",sizingMethod="' + (t == 2 ? 'scale' : 'crop') + '")';
  65         }
  66
  67         this.hook.enabled = h;
  68 };
  69
  70
  71 IEPNGFix.process = function(elm, init) {
  72         // Checks the onpropertychange event (on first 'init' run, a fake event)
  73         // and calls the filter-applying-functions.
  74
  75         if (
  76                 !/MSIE (5\.5|6)/.test(navigator.userAgent) ||
  77                 typeof elm.filters == 'unknown'
  78         ) {
  79                 return;
  80         }
  81         if (!this.data[elm.uniqueID]) {
  82                 this.data[elm.uniqueID] = {
  83                         className: ''
  84                 };
  85         }
  86         var data = this.data[elm.uniqueID],
  87                 evt = init ? { propertyName: 'src,backgroundImage' } : event,
  88                 isSrc = /src/.test(evt.propertyName),
  89                 isBg = /backgroundImage/.test(evt.propertyName),
  90                 isPos = /width|height|background(Pos|Rep)/.test(evt.propertyName),
  91                 isClass = !init && ((elm.className != data.className) &&
  92                         (elm.className || data.className));
  93         if (!(isSrc || isBg || isPos || isClass)) {
  94                 return;
  95         }
  96         data.className = elm.className;
  97         var blank = this.blankImg.match(/([^\/]+)$/)[1],
  98                 eS = elm.style,
  99                 eCS = elm.currentStyle;
 100
 101         // Required for Whatever:hover - erase set BG if className changes.
 102         if (
 103                 isClass && (eS.backgroundImage.indexOf('url(') == -1 ||
 104                 eS.backgroundImage.indexOf(blank) > -1)
 105         ) {
 106                 return setTimeout(function() {
 107                         eS.backgroundImage = '';
 108                 }, 0);
 109         }
 110
 111         // Foregrounds.
 112         if (isSrc && elm.src && { IMG: 1, INPUT: 1 }[elm.nodeName]) {
 113                 if ((/\.png/i).test(elm.src)) {
 114                         if (!elm.oSrc) {
 115                                 // MM rollover compat
 116                                 elm.oSrc = elm.src;
 117                         }
 118                         this.fix(elm, elm.src, 2);
 119                 } else if (elm.src.indexOf(blank) == -1) {
 120                         this.fix(elm, '');
 121                 }
 122         }
 123
 124         // Backgrounds.
 125         var bgSrc = eCS.backgroundImage || eS.backgroundImage;
 126         if ((bgSrc + elm.src).indexOf(blank) == -1) {
 127                 var bgPNG = bgSrc.match(/url[("']+(.*\.png[^\)"']*)[\)"']/i);
 128                 if (bgPNG) {
 129                         if (this.tileBG && !{ IMG: 1, INPUT: 1 }[elm.nodeName]) {
 130                                 this.tileBG(elm, bgPNG[1]);
 131                                 this.fix(elm, '', 1);
 132                         } else {
 133                                 if (data.tiles && data.tiles.src) {
 134                                         this.tileBG(elm, '');
 135                                 }
 136                                 this.fix(elm, bgPNG[1], 1);
 137                                 this.childFix(elm);
 138                         }
 139                 } else {
 140                         if (data.tiles && data.tiles.src) {
 141                                 this.tileBG(elm, '');
 142                         }
 143                         this.fix(elm, '');
 144                 }
 145         } else if ((isPos || isClass) && data.tiles && data.tiles.src) {
 146                 this.tileBG(elm, data.tiles.src);
 147         }
 148
 149         if (init) {
 150                 this.hook.enabled = 1;
 151                 elm.attachEvent('onpropertychange', this.hook);
 152         }
 153 };
 154
 155
 156 IEPNGFix.childFix = function(elm) {
 157         // "hasLayout" fix for unclickable children inside PNG backgrounds.
 158         var tags = [
 159                         'a',
 160                         'input',
 161                         'select',
 162                         'textarea',
 163                         'button',
 164                         'iframe',
 165                         'object'
 166                 ],
 167                 t = tags.length,
 168                 tFix = [];
 169         while (t--) {
 170                 var pFix = elm.all.tags(tags[t]),
 171                         e = pFix.length;
 172                 while (e--) {
 173                         tFix.push(pFix[e]);
 174                 }
 175         }
 176         t = tFix.length;
 177         if (t && (/relative|absolute/i).test(elm.currentStyle.position)) {
 178                 alert('IEPNGFix: Unclickable children of element:' +
 179                         '\n\n<' + elm.nodeName + (elm.id && ' id=' + elm.id) + '>');
 180         }
 181         while (t--) {
 182                 if (!(/relative|absolute/i).test(tFix[t].currentStyle.position)) {
 183                         tFix[t].style.position = 'relative';
 184                 }
 185         }
 186 };
 187
 188
 189 IEPNGFix.hook = function() {
 190         if (IEPNGFix.hook.enabled) {
 191                 IEPNGFix.process(element, 0);
 192         }
 193 };
 194
 195
 196 IEPNGFix.process(element, 1);
 197
 198 </script>
 199 </public:component>