/*
 * ***** BEGIN LICENSE BLOCK *****
 * Version: ZAPL 1.1
 * 
 * The contents of this file are subject to the Zimbra AJAX Public
 * License Version 1.1 ("License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.zimbra.com/license
 * 
 * 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: Zimbra AJAX Toolkit.
 * 
 * The Initial Developer of the Original Code is Zimbra, Inc.
 * Portions created by Zimbra are Copyright (C) 2005 Zimbra, Inc.
 * All Rights Reserved.
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK *****
 */

function Dwt() {
}

// Constants for positioning
Dwt.STATIC_STYLE = "static";
Dwt.ABSOLUTE_STYLE = "absolute";
Dwt.RELATIVE_STYLE = "relative";

// Background repeat 
Dwt.NO_REPEAT = "no-repeat";
Dwt.REPEAT = "repeat";
Dwt.REPEAT_X = "repeat-x";
Dwt.REPEAT_Y = "repeat-y";

// constants for layout
Dwt.LEFT = 100;
Dwt.RIGHT = 101;
Dwt.TOP = 102;
Dwt.BOTTOM = 103;

Dwt.ABOVE = 104;
Dwt.BELOW = 105;

Dwt.WIDTH = 106;
Dwt.HEIGHT = 107;

// Scroll constants
Dwt.CLIP = 1;
Dwt.VISIBLE = 2;
Dwt.SCROLL = 3;
Dwt.FIXED_SCROLL = 4;

// z-index order
Dwt.Z_HIDDEN = 100;		// hide the display
Dwt.Z_CURTAIN = 200;	// not used; could be used if there is leakage
Dwt.Z_VIEW = 300;		// make visible
Dwt.Z_TOOLTIP = 400;	// tool tips
Dwt.Z_MENU = 500;		// popup menus
Dwt.Z_VEIL = 600;		// goes below dialogs to make them modal
Dwt.Z_DIALOG = 700;		// dialogs
Dwt.Z_DIALOG_MENU = 750;// menus in dialogs
Dwt.Z_DND = 800;		// Drag N Drop icons
Dwt.Z_BUSY = 900;		// used to block user input
Dwt.Z_SPLASH = 1000;    // used for splash screens

Dwt.Z_INC = 1;			// atomic amount to bump z-index if needed

Dwt.DEFAULT = -123456789;

Dwt.LOC_NOWHERE = -10000; // for positioning an element offscreen

// Drag N Drop action constants
Dwt.DND_DROP_NONE = 0;
Dwt.DND_DROP_COPY = 1;
Dwt.DND_DROP_MOVE = 2;

// Keys used for retrieving data
Dwt.KEY_OBJECT = "_object_";
Dwt.KEY_ID = "_id_";

Dwt._nextId = 1;

Dwt.getDomObj =
function(doc, id)  {
	return doc.getElementById(id);
}

Dwt.getNextId =
function() {
	return "DWT" + Dwt._nextId++;
}

Dwt.associateElementWithObject = function (domElement, jsObject){
	domElement.dwtObj = jsObject.__internalId = AjxCore.assignId(jsObject);
};

Dwt.disassociateElementFromObject = function (domElement, jsObject){
	if (domElement){
		delete domElement.dwtObj;
	}
	if (jsObject.__internalId){
		AjxCore.unassignId(jsObject.__internalId);
	}
};

Dwt.getObjectFromElement = function (domElement) {
	return AjxCore.objectWithId(domElement.dwtObj);
};


Dwt.getBackgroundRepeat =
function(htmlElement) {
	return DwtCssStyle.getProperty(htmlElement, "background-repeat");
}

Dwt.setBackgroundRepeat =
function(htmlElement, style) {
	htmlElement.style.backgroundRepeat = style;
}

Dwt.getBounds =
function(htmlElement, incScroll) {
	var loc = Dwt.getLocation(htmlElement);
	var size = Dwt.getSize(htmlElement, incScroll);
	return new DwtRectangle(loc.x, loc.y, size.x, size.y);
}

Dwt.setBounds =
function(htmlElement, x, y, width, height) {
	Dwt.setLocation(htmlElement, x, y);
	Dwt.setSize(htmlElement, width, height);
}

Dwt.getCursor = 
function(htmlElement) {
	return DwtCssStyle.getProperty(htmlElement, "cursor");
}

Dwt.setCursor =
function(htmlElement, cursorName) {
	htmlElement.style.cursor = cursorName;
}


Dwt.getLocation =
function(htmlElement) {
	if (htmlElement.style.position == Dwt.ABSOLUTE_STYLE)
		return new DwtPoint(parseInt(DwtCssStyle.getProperty(htmlElement, "left")),
		                    parseInt(DwtCssStyle.getProperty(htmlElement, "top")));
	else
		return Dwt.toWindow(htmlElement, 0, 0);
}

Dwt.setLocation =
function(htmlElement, x, y) {
	if (htmlElement.style.position != Dwt.ABSOLUTE_STYLE) {
		DBG.println(AjxDebug.DBG1, "Cannot position static widget " + htmlElement.className);
		throw new DwtException("Static widgets may not be positioned", DwtException.INVALID_OP, "Dwt.setLocation");
	}
	if (x = Dwt.checkPxVal(x))
		htmlElement.style.left = x;
	if (y = Dwt.checkPxVal(y))
		htmlElement.style.top = y;
}

Dwt.checkPxVal =
function(val) {
	if (val == Dwt.DEFAULT)
		return false;
	if (typeof(val) == "number" && val != Dwt.LOC_NOWHERE) {
//		if (val < 0) {
//			DBG.println(AjxDebug.DBG1, "negative pixel value: " + val);
//			val = 0;
//		}
		val = val + "px";
	}
	return val;
}

Dwt.getPosition =
function(htmlElement) {
	return htmlElement.style.position;
}

Dwt.setPosition =
function(htmlElement, posStyle) {
	htmlElement.style.position = posStyle;
}

Dwt.getScrollStyle =
function(htmlElement) {
	var overflow =  DwtCssStyle.getProperty(htmlElement, "overflow");
	if (overflow == "hidden")
		return Dwt.CLIP;
	else if (overflow =="auto")
		return Dwt.SCROLL;
	else if (overflow =="scroll")
		return Dwt.FIXED_SCROLL;
	else
		return Dwt.VISIBLE;
}

Dwt.setScrollStyle =
function(htmlElement, scrollStyle) {
	if (scrollStyle == Dwt.CLIP)
		htmlElement.style.overflow = "hidden";
	else if (scrollStyle == Dwt.SCROLL)
		htmlElement.style.overflow = "auto";
	else if (scrollStyle == Dwt.FIXED_SCROLL)
		htmlElement.style.overflow = "scroll";
	else
		htmlElement.style.overflow = "visible";
}

// Note: in FireFox, offsetHeight includes border and clientHeight does not;
// may want to look at clientHeight for FF
Dwt.getSize = 
function(htmlElement, incScroll) {
	var p = new DwtPoint(0, 0);
	if (htmlElement.offsetWidth != null) {
		p.x = htmlElement.offsetWidth;
		p.y = htmlElement.offsetHeight;
	} else if (htmlElement.clip && htmlElement.clip.width != null) {
		p.x = htmlElement.clip.width;
		p.y = htmlElement.clip.height;
	} else if (htmlElement.style && htmlElement.style.pixelWidth != null) {
		p.x = htmlElement.style.pixelWidth;
		p.y = htmlElement.style.pixelHeight;
	}
	p.x = parseInt(p.x);
	p.y = parseInt(p.y);
	return p;
}

Dwt.setSize = 
function(htmlElement, width, height) {
	if (width = Dwt.checkPxVal(width))
		htmlElement.style.width = width;
	if (height = Dwt.checkPxVal(height))
		htmlElement.style.height = height;
}

/**
* Measure the extent in pixels of a section of html
*/
Dwt.getHtmlExtent =
function(html) {
	if (!Dwt._measureDiv) {
		var measureDiv = document.createElement("div");
		measureDiv.id = this._measureDivId = Dwt.getNextId();
		Dwt.setPosition(measureDiv, Dwt.ABSOLUTE_STYLE);
		Dwt.setLocation(measureDiv, Dwt.LOC_NOWHERE, Dwt.LOC_NOWHERE);
		document.body.appendChild(measureDiv);
		Dwt._measureDiv = measureDiv;
	}
	Dwt._measureDiv.innerHTML = html;
	return Dwt.getSize(Dwt._measureDiv);
}

Dwt.getVisible =
function(htmlElement) {
	var disp = DwtCssStyle.getProperty(htmlElement, "display");
	return (disp == "none") ? false : true;
}

Dwt.setVisible =
function(htmlElement, visible) {
	if (visible) {
  		htmlElement.style.display= "block";
	} else {
		htmlElement.style.display = "none";
	}

}

Dwt.setVisible2 =
function(htmlElement, visible) {
	if (visible) {
  		htmlElement.style.visibility = "visible";
	} else {
		htmlElement.style.visibility = "hidden";
	}
}

Dwt.getZIndex =
function(htmlElement) {
	return DwtCssStyle.getProperty(htmlElement, "z-index");
}

Dwt.setZIndex =
function(htmlElement, idx) {
//DBG.println(AjxDebug.DBG3, "set zindex for " + htmlElement.className + ": " + idx);
	htmlElement.style.zIndex = idx;
}

Dwt.toWindow =
function(htmlElement, x, y, containerElement) {
	var container = (containerElement == null)? null: containerElement;

	var p = new DwtPoint(x, y);
	// EMC 6/3/2005
	// changed the below line, since it meant we did not 
	// include the given element in our location calculation.
	//var offsetParent = htmlElement.offsetParent;
	var offsetParent = htmlElement;
	while (offsetParent != containerElement) {
		p.x += offsetParent.offsetLeft;
		p.y += offsetParent.offsetTop;
		offsetParent = offsetParent.offsetParent;
	}
	return p;
}

Dwt.setStatus =
function(text) {
	window.status = text;
}

Dwt.getTitle = 
function(text) {
	return window.document.title;
}

Dwt.setTitle = 
function(text) {
	window.document.title = text;
}

Dwt.getIframeDoc = 
function(iframeObj) {
	return AjxEnv.isIE 
		? (iframeObj ? iframeObj.contentWindow.document : null)
		: iframeObj.contentDocument;
}

Dwt.getIframeWindow = 
function(iframeObj) {
	return iframeObj.contentWindow;
}

Dwt._ffOverflowHack = 
function (htmlElId, myZindex, lowThresholdZ, turnOffOverflowScroll, disableSelf) {
	if (!AjxEnv.isNav)
		return;
		
	var ds = disableSelf? disableSelf: false;
	var lowThresholdZIndex = lowThresholdZ? lowThresholdZ: -100;
	var coll = document.getElementsByTagName("div");
	var temp = null;
	var len = coll.length;
	var lastGoodZIndex = -1;
	for (var i = 0; i < len; ++i) {
		temp = coll[i];
		if (temp.id == htmlElId) {
			temp = coll[++i];
			while(i < len && temp.style.zIndex == '') {
				// enable myself if someone else turned me off
				if (temp._oldOverflow && turnOffOverflowScroll){
					temp.style.overflow = temp._oldOverflow;
					delete temp._oldOverflow;
				} else if (ds){
					temp._oldOverflow = temp.style.overflow;
					temp.style.overflow = "hidden";
				}
				temp = coll[++i];
			}
			if (i == len)
				break;
		}
		var divZIndex = parseInt(temp.style.zIndex);
		// assume that if the value is auto, that we want to shut off the 
		// overflow setting.
		if (isNaN(divZIndex)) {
			divZIndex = lastGoodZIndex;
		} else {
			lastGoodZIndex = divZIndex;
		}
		if ( divZIndex < myZindex && divZIndex >= lowThresholdZIndex) {
			switch (turnOffOverflowScroll) {
			case true:
				if (!temp._oldOverflow) {
					var cssDecl = window.getComputedStyle(temp,"");
					var overflow = cssDecl.getPropertyValue("overflow");
					if (overflow != 'hidden') {
						temp._oldOverflow = overflow;
						temp._oldScrollTop = temp.scrollTop;
						temp.style.overflow = "visible";
					}
				}
				break;
			case false:
				if (temp._oldOverflow) {
					temp.style.overflow = temp._oldOverflow;
					delete temp._oldOverflow;
				}
				if (temp._oldScrollTop != null) {
					temp.scrollTop = temp._oldScrollTop;
				}
				break;
			}
		}
	}
};

/**
 * returns a node for the given tag
 */
Dwt.parseHtmlFragment = function (htmlStr, tagName) {
	if (!Dwt._divBuffer) {
		Dwt._divBuffer = document.createElement('div');
	}	
	var html = htmlStr;
	if (tagName && tagName == "TR"){
		html = "<table style='table-layout:fixed'>" + htmlStr + "</table>";
	}
	var div = Dwt._divBuffer;
	div.innerHTML = html;
	if (tagName && tagName == "TR"){
		return div.firstChild.rows[0];
	} else {
		return div.firstChild;
	}
};

Dwt.contains = 
function (parentEl, childEl) {
  	var isContained = false;
  	if (AjxEnv.isSafari) {
  		return false;
  	} else if (parentEl.compareDocumentPosition) {
		var relPos = parentEl.compareDocumentPosition(childEl);
		if ((relPos == (document.DOCUMENT_POSITION_CONTAINED_BY | document.DOCUMENT_POSITION_FOLLOWING))) {
			isContained = true;
		}

  	} else if (parentEl.contains) {
  		isContained = parentEl.contains(childEl);
  	}
  	return isContained;
};

Dwt.removeChildren =
function(htmlEl) {
	while (htmlEl.hasChildNodes())
		htmlEl.removeChild(htmlEl.firstChild);
}