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/**
* Root renderer; creates the outermost container element and handles keeping it aligned
* with the target element's size and position.
* @param {Element} el The target element
* @param {Object} styleInfos The StyleInfo objects
*/
PIE.RootRenderer = PIE.RendererBase.newRenderer( {
isActive: function() {
var children = this.childRenderers;
for( var i in children ) {
if( children.hasOwnProperty( i ) && children[ i ].isActive() ) {
return true;
}
}
return false;
},
needsUpdate: function() {
return this.styleInfos.visibilityInfo.changed();
},
updatePos: function() {
if( this.isActive() ) {
var el = this.getPositioningElement(),
par = el,
docEl,
parRect,
tgtCS = el.currentStyle,
tgtPos = tgtCS.position,
boxPos,
s = this.getBox().style, cs,
x = 0, y = 0,
elBounds = this.boundsInfo.getBounds(),
logicalZoomRatio = elBounds.logicalZoomRatio;
if( tgtPos === 'fixed' && PIE.ieVersion > 6 ) {
x = elBounds.x * logicalZoomRatio;
y = elBounds.y * logicalZoomRatio;
boxPos = tgtPos;
} else {
// Get the element's offsets from its nearest positioned ancestor. Uses
// getBoundingClientRect for accuracy and speed.
do {
par = par.offsetParent;
} while( par && ( par.currentStyle.position === 'static' ) );
if( par ) {
parRect = par.getBoundingClientRect();
cs = par.currentStyle;
x = ( elBounds.x - parRect.left ) * logicalZoomRatio - ( parseFloat(cs.borderLeftWidth) || 0 );
y = ( elBounds.y - parRect.top ) * logicalZoomRatio - ( parseFloat(cs.borderTopWidth) || 0 );
} else {
docEl = doc.documentElement;
x = ( elBounds.x + docEl.scrollLeft - docEl.clientLeft ) * logicalZoomRatio;
y = ( elBounds.y + docEl.scrollTop - docEl.clientTop ) * logicalZoomRatio;
}
boxPos = 'absolute';
}
s.position = boxPos;
s.left = x;
s.top = y;
s.zIndex = tgtPos === 'static' ? -1 : tgtCS.zIndex;
this.isPositioned = true;
}
},
updateSize: PIE.emptyFn,
updateVisibility: function() {
var vis = this.styleInfos.visibilityInfo.getProps();
this.getBox().style.display = ( vis.visible && vis.displayed ) ? '' : 'none';
},
updateProps: function() {
if( this.isActive() ) {
this.updateVisibility();
} else {
this.destroy();
}
},
getPositioningElement: function() {
var el = this.targetElement;
return el.tagName in PIE.tableCellTags ? el.offsetParent : el;
},
getBox: function() {
var box = this._box, el;
if( !box ) {
el = this.getPositioningElement();
box = this._box = doc.createElement( 'css3-container' );
box.style['direction'] = 'ltr'; //fix positioning bug in rtl environments
this.updateVisibility();
el.parentNode.insertBefore( box, el );
}
return box;
},
finishUpdate: PIE.emptyFn,
destroy: function() {
var box = this._box, par;
if( box && ( par = box.parentNode ) ) {
par.removeChild( box );
}
delete this._box;
delete this._layers;
}
} );
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