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+/*
+ * xbStyle.js
+ * $Revision: 1.2 $ $Date: 2003/02/07 16:04:22 $
+ */
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Netscape code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Bob Clary <bclary@netscape.com>
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+function xbStyleNotSupported() {}
+
+function xbStyleNotSupportStringValue(propname) { xbDEBUG.dump(propname + ' is not supported in this browser'); return '';};
+
+/////////////////////////////////////////////////////////////
+// xbClipRect
+
+function xbClipRect(a1, a2, a3, a4)
+{
+  this.top  = 0;
+  this.right  = 0;
+  this.bottom  = 0;
+  this.left  = 0;
+
+  if (typeof(a1) == 'string')
+  {
+    var val;
+    var ca;
+    var i;
+      
+    if (a1.indexOf('rect(') == 0)
+    {
+      // I would have preferred [0-9]+[a-zA-Z]+ for a regexp
+      // but NN4 returns null for that. 
+      ca = a1.substring(5, a1.length-1).match(/-?[0-9a-zA-Z]+/g);
+      for (i = 0; i < 4; ++i)
+      {
+        val = xbToInt(ca[i]);
+        if (val != 0 && ca[i].indexOf('px') == -1)
+        {
+          xbDEBUG.dump('xbClipRect: A clipping region ' + a1 + ' was detected that did not use pixels as units.  Click Ok to continue, Cancel to Abort');
+          return;
+        }
+        ca[i] = val;
+      }
+      this.top    = ca[0];
+      this.right  = ca[1];
+      this.bottom = ca[2];
+      this.left   = ca[3];
+    }
+  }    
+  else if (typeof(a1) == 'number' && typeof(a2) == 'number' && typeof(a3) == 'number' && typeof(a4) == 'number')
+  {
+    this.top    = a1;
+    this.right  = a2;
+    this.bottom = a3;
+    this.left   = a4;
+  }
+}
+
+xbClipRect.prototype.top = 0;
+xbClipRect.prototype.right = 0;
+xbClipRect.prototype.bottom = 0;
+xbClipRect.prototype.left = 0;
+
+
+function xbClipRectGetWidth()
+{
+    return this.right - this.left;
+}
+xbClipRect.prototype.getWidth = xbClipRectGetWidth; 
+
+function xbClipRectSetWidth(width)
+{
+  this.right = this.left + width;
+}
+xbClipRect.prototype.setWidth = xbClipRectSetWidth;
+
+function xbClipRectGetHeight()
+{
+    return this.bottom - this.top;
+}
+xbClipRect.prototype.getHeight = xbClipRectGetHeight; 
+
+function xbClipRectSetHeight(height)
+{
+  this.bottom = this.top + height;
+}
+xbClipRect.prototype.setHeight = xbClipRectSetHeight;
+
+function xbClipRectToString()
+{
+  return 'rect(' + this.top + 'px ' + this.right + 'px ' + this.bottom + 'px ' + this.left + 'px )' ;
+}
+xbClipRect.prototype.toString = xbClipRectToString;
+
+/////////////////////////////////////////////////////////////
+// xbStyle
+//
+// Note Opera violates the standard by cascading the effective values
+// into the HTMLElement.style object. We can use IE's HTMLElement.currentStyle
+// to get the effective values. In Gecko we will use the W3 DOM Style Standard getComputedStyle
+
+function xbStyle(obj, win, position)
+{
+  if (typeof(obj) == 'object' && typeof(obj.style) != 'undefined') 
+    this.styleObj = obj.style;
+  else if (document.layers) // NN4
+  {
+    if (typeof(position) == 'undefined')
+      position = '';
+        
+    this.styleObj = obj;
+    this.styleObj.position = position;
+  }
+  this.object = obj;
+  this.window = win ? win : window;
+}
+
+xbStyle.prototype.styleObj = null;
+xbStyle.prototype.object = null;
+
+/////////////////////////////////////////////////////////////
+// xbStyle.getEffectiveValue()
+// note that xbStyle's constructor uses the currentStyle object 
+// for IE5+ and that Opera's style object contains computed values
+// already. Netscape Navigator's layer object also contains the 
+// computed values as well. Note that IE4 will not return the 
+// computed values.
+
+function xbStyleGetEffectiveValue(propname)
+{
+  var value = null;
+
+  if (this.window.document.defaultView && this.window.document.defaultView.getComputedStyle)
+  {
+    // W3
+    // Note that propname is the name of the property in the CSS Style
+    // Object. However the W3 method getPropertyValue takes the actual
+    // property name from the CSS Style rule, i.e., propname is 
+    // 'backgroundColor' but getPropertyValue expects 'background-color'.
+
+     var capIndex;
+     var cappropname = propname;
+
+     while ( (capIndex = cappropname.search(/[A-Z]/)) != -1)
+     {
+       if (capIndex != -1)
+       {
+         cappropname = cappropname.substring(0, capIndex) + '-' + cappropname.substring(capIndex, capIndex+1).toLowerCase() + cappropname.substr(capIndex+1);
+       }
+     }
+
+     value = this.window.document.defaultView.getComputedStyle(this.object, '').getPropertyValue(cappropname);
+
+     // xxxHack for Gecko:
+     if (!value && this.styleObj[propname])
+     {
+       value = this.styleObj[propname];
+     }
+  }
+  else if (typeof(this.styleObj[propname]) == 'undefined') 
+  {
+    value = xbStyleNotSupportStringValue(propname);
+  }
+  else if (typeof(this.object.currentStyle) != 'undefined')
+  {
+    // IE5+
+    value = this.object.currentStyle[propname];
+    if (!value)
+    {
+      value = this.styleObj[propname];
+    }
+
+    if (propname == 'clip' && !value)
+    {
+      // clip is not stored in IE5/6 handle separately
+      value = 'rect(' + this.object.currentStyle.clipTop + ', ' + this.object.currentStyle.clipRight + ', ' + this.object.currentStyle.clipBottom + ', ' + this.object.currentStyle.clipLeft + ')';
+    }
+  }
+  else
+  {
+    // IE4+, Opera, NN4
+    value = this.styleObj[propname];
+  }
+
+  return value;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.moveAbove()
+
+function xbStyleMoveAbove(cont)
+{
+  this.setzIndex(cont.getzIndex()+1);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.moveBelow()
+
+function xbStyleMoveBelow(cont)
+{
+  var zindex = cont.getzIndex() - 1;
+            
+  this.setzIndex(zindex);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.moveBy()
+
+function xbStyleMoveBy(deltaX, deltaY)
+{
+  this.moveTo(this.getLeft() + deltaX, this.getTop() + deltaY);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.moveTo()
+
+function xbStyleMoveTo(x, y)
+{
+  this.setLeft(x);
+  this.setTop(y);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.moveToAbsolute()
+
+function xbStyleMoveToAbsolute(x, y)
+{
+  this.setPageX(x);
+  this.setPageY(y);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.resizeBy()
+
+function xbStyleResizeBy(deltaX, deltaY)
+{
+  this.setWidth( this.getWidth() + deltaX );
+  this.setHeight( this.getHeight() + deltaY );
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// xbStyle.resizeTo()
+
+function xbStyleResizeTo(x, y)
+{
+  this.setWidth(x);
+  this.setHeight(y);
+}
+
+////////////////////////////////////////////////////////////////////////
+
+xbStyle.prototype.getEffectiveValue     = xbStyleGetEffectiveValue;
+xbStyle.prototype.moveAbove             = xbStyleMoveAbove;
+xbStyle.prototype.moveBelow             = xbStyleMoveBelow;
+xbStyle.prototype.moveBy                = xbStyleMoveBy;
+xbStyle.prototype.moveTo                = xbStyleMoveTo;
+xbStyle.prototype.moveToAbsolute        = xbStyleMoveToAbsolute;
+xbStyle.prototype.resizeBy              = xbStyleResizeBy;
+xbStyle.prototype.resizeTo              = xbStyleResizeTo;
+
+if (document.all || document.getElementsByName)
+{
+  xblibrary.loadScript('xbStyle-css.js');
+}
+else if (document.layers)
+{
+  xblibrary.loadScript('xbStyle-nn4.js');
+}
+else 
+{
+  xblibrary.loadScript('xbStyle-not-supported.js');
+}
+
+