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1 /* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net) |
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2 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) |
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3 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. |
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4 * |
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5 * $LastChangedDate: 2007-07-21 18:44:59 -0500 (Sat, 21 Jul 2007) $ |
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6 * $Rev: 2446 $ |
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7 * |
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8 * Version 2.1.1 |
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9 */ |
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10 |
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11 (function($){ |
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12 |
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13 /** |
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14 * The bgiframe is chainable and applies the iframe hack to get |
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15 * around zIndex issues in IE6. It will only apply itself in IE6 |
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16 * and adds a class to the iframe called 'bgiframe'. The iframe |
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17 * is appeneded as the first child of the matched element(s) |
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18 * with a tabIndex and zIndex of -1. |
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19 * |
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20 * By default the plugin will take borders, sized with pixel units, |
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21 * into account. If a different unit is used for the border's width, |
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22 * then you will need to use the top and left settings as explained below. |
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23 * |
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24 * NOTICE: This plugin has been reported to cause perfromance problems |
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25 * when used on elements that change properties (like width, height and |
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26 * opacity) a lot in IE6. Most of these problems have been caused by |
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27 * the expressions used to calculate the elements width, height and |
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28 * borders. Some have reported it is due to the opacity filter. All |
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29 * these settings can be changed if needed as explained below. |
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30 * |
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31 * @example $('div').bgiframe(); |
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32 * @before <div><p>Paragraph</p></div> |
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33 * @result <div><iframe class="bgiframe".../><p>Paragraph</p></div> |
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34 * |
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35 * @param Map settings Optional settings to configure the iframe. |
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36 * @option String|Number top The iframe must be offset to the top |
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37 * by the width of the top border. This should be a negative |
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38 * number representing the border-top-width. If a number is |
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39 * is used here, pixels will be assumed. Otherwise, be sure |
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40 * to specify a unit. An expression could also be used. |
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41 * By default the value is "auto" which will use an expression |
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42 * to get the border-top-width if it is in pixels. |
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43 * @option String|Number left The iframe must be offset to the left |
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44 * by the width of the left border. This should be a negative |
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45 * number representing the border-left-width. If a number is |
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46 * is used here, pixels will be assumed. Otherwise, be sure |
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47 * to specify a unit. An expression could also be used. |
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48 * By default the value is "auto" which will use an expression |
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49 * to get the border-left-width if it is in pixels. |
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50 * @option String|Number width This is the width of the iframe. If |
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51 * a number is used here, pixels will be assume. Otherwise, be sure |
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52 * to specify a unit. An experssion could also be used. |
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53 * By default the value is "auto" which will use an experssion |
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54 * to get the offsetWidth. |
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55 * @option String|Number height This is the height of the iframe. If |
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56 * a number is used here, pixels will be assume. Otherwise, be sure |
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57 * to specify a unit. An experssion could also be used. |
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58 * By default the value is "auto" which will use an experssion |
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59 * to get the offsetHeight. |
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60 * @option Boolean opacity This is a boolean representing whether or not |
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61 * to use opacity. If set to true, the opacity of 0 is applied. If |
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62 * set to false, the opacity filter is not applied. Default: true. |
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63 * @option String src This setting is provided so that one could change |
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64 * the src of the iframe to whatever they need. |
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65 * Default: "javascript:false;" |
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66 * |
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67 * @name bgiframe |
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68 * @type jQuery |
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69 * @cat Plugins/bgiframe |
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70 * @author Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net) |
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71 */ |
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72 $.fn.bgIframe = $.fn.bgiframe = function(s) { |
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73 // This is only for IE6 |
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74 if ( $.browser.msie && /6.0/.test(navigator.userAgent) ) { |
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75 s = $.extend({ |
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76 top : 'auto', // auto == .currentStyle.borderTopWidth |
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77 left : 'auto', // auto == .currentStyle.borderLeftWidth |
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78 width : 'auto', // auto == offsetWidth |
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79 height : 'auto', // auto == offsetHeight |
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80 opacity : true, |
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81 src : 'javascript:false;' |
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82 }, s || {}); |
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83 var prop = function(n){return n&&n.constructor==Number?n+'px':n;}, |
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84 html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+ |
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85 'style="display:block;position:absolute;z-index:-1;'+ |
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86 (s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+ |
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87 'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+ |
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88 'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+ |
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89 'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+ |
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90 'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+ |
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91 '"/>'; |
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92 return this.each(function() { |
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93 if ( $('> iframe.bgiframe', this).length == 0 ) |
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94 this.insertBefore( document.createElement(html), this.firstChild ); |
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95 }); |
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96 } |
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97 return this; |
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98 }; |
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99 |
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100 })(jQuery); |