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+/* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net)
+ * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
+ * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
+ *
+ * $LastChangedDate$
+ * $Rev$
+ */
+
+(function($){
+
+/**
+ * The bgiframe is chainable and applies the iframe hack to get
+ * around zIndex issues in IE6. It will only apply itself in IE
+ * and adds a class to the iframe called 'bgiframe'. The iframe
+ * is appeneded as the first child of the matched element(s)
+ * with a tabIndex and zIndex of -1.
+ *
+ * By default the plugin will take borders, sized with pixel units,
+ * into account. If a different unit is used for the border's width,
+ * then you will need to use the top and left settings as explained below.
+ *
+ * NOTICE: This plugin has been reported to cause perfromance problems
+ * when used on elements that change properties (like width, height and
+ * opacity) a lot in IE6. Most of these problems have been caused by
+ * the expressions used to calculate the elements width, height and
+ * borders. Some have reported it is due to the opacity filter. All
+ * these settings can be changed if needed as explained below.
+ *
+ * @example $('div').bgiframe();
+ * @before <div><p>Paragraph</p></div>
+ * @result <div><iframe class="bgiframe".../><p>Paragraph</p></div>
+ *
+ * @param Map settings Optional settings to configure the iframe.
+ * @option String|Number top The iframe must be offset to the top
+ * by the width of the top border. This should be a negative
+ * number representing the border-top-width. If a number is
+ * is used here, pixels will be assumed. Otherwise, be sure
+ * to specify a unit. An expression could also be used.
+ * By default the value is "auto" which will use an expression
+ * to get the border-top-width if it is in pixels.
+ * @option String|Number left The iframe must be offset to the left
+ * by the width of the left border. This should be a negative
+ * number representing the border-left-width. If a number is
+ * is used here, pixels will be assumed. Otherwise, be sure
+ * to specify a unit. An expression could also be used.
+ * By default the value is "auto" which will use an expression
+ * to get the border-left-width if it is in pixels.
+ * @option String|Number width This is the width of the iframe. If
+ * a number is used here, pixels will be assume. Otherwise, be sure
+ * to specify a unit. An experssion could also be used.
+ * By default the value is "auto" which will use an experssion
+ * to get the offsetWidth.
+ * @option String|Number height This is the height of the iframe. If
+ * a number is used here, pixels will be assume. Otherwise, be sure
+ * to specify a unit. An experssion could also be used.
+ * By default the value is "auto" which will use an experssion
+ * to get the offsetHeight.
+ * @option Boolean opacity This is a boolean representing whether or not
+ * to use opacity. If set to true, the opacity of 0 is applied. If
+ * set to false, the opacity filter is not applied. Default: true.
+ * @option String src This setting is provided so that one could change
+ * the src of the iframe to whatever they need.
+ * Default: "javascript:false;"
+ *
+ * @name bgiframe
+ * @type jQuery
+ * @cat Plugins/bgiframe
+ * @author Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
+ */
+$.fn.bgIframe = jQuery.fn.bgiframe = function(s) {
+ // This is only for IE6
+ if ( !($.browser.msie && typeof XMLHttpRequest == 'function') ) return this;
+ s = $.extend({
+ top : 'auto', // auto == .currentStyle.borderTopWidth
+ left : 'auto', // auto == .currentStyle.borderLeftWidth
+ width : 'auto', // auto == offsetWidth
+ height : 'auto', // auto == offsetHeight
+ opacity : true,
+ src : 'javascript:false;'
+ }, s || {});
+ var prop = function(n){return n&&n.constructor==Number?n+'px':n;},
+ html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
+ 'style="display:block;position:absolute;z-index:-1;'+
+ (s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+
+ 'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+
+ 'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+
+ 'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+
+ 'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+
+ '"/>';
+ return this.each(function() {
+ if ( !$('iframe.bgiframe', this)[0] )
+ this.insertBefore( document.createElement(html), this.firstChild );
+ });
+};
+
+})(jQuery);
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dépôts / velocampus / web / www.git / blobdiff