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/**
* Root renderer for IE9; manages the rendering layers in the element's background
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
*/
PIE.IE9RootRenderer = PIE.RendererBase.newRenderer( {
updatePos: PIE.emptyFn,
updateSize: PIE.emptyFn,
updateVisibility: PIE.emptyFn,
updateProps: PIE.emptyFn,
outerCommasRE: /^,+|,+$/g,
innerCommasRE: /,+/g,
setBackgroundLayer: function(zIndex, bg) {
var me = this,
bgLayers = me._bgLayers || ( me._bgLayers = [] ),
undef;
bgLayers[zIndex] = bg || undef;
},
finishUpdate: function() {
var me = this,
bgLayers = me._bgLayers,
bg;
if( bgLayers && ( bg = bgLayers.join( ',' ).replace( me.outerCommasRE, '' ).replace( me.innerCommasRE, ',' ) ) !== me._lastBg ) {
me._lastBg = me.targetElement.runtimeStyle.background = bg;
}
},
destroy: function() {
this.targetElement.runtimeStyle.background = '';
delete this._bgLayers;
}
} );
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