function TextTool()
{
	this.m_edited = null;
	this.m_edit = null;
	this.m_status = TXT_STATE_NONE;
	this.m_type = TXT_EDIT_TYPE_EXISTING;
	this.m_lastCreated = 0;
	
	//////////////////////////////////////////////////////////////
	//tool interface, each tool must impleent this
	this.ClearTool = function()
	{
		this.ClearEdit();
		var wa = document.getElementById("workingArea");
		wa.style.cursor = 'default';
	}
	this.GetToolName = function()
	{
		return "textEditTool";
	}
	
	this.GetToolType= function()
	{
		return this.m_type;
	}
	this.InitTool = function(initVal)
	{
		var wa = document.getElementById("workingArea");
		wa.style.cursor = 'text';
		this.m_type=initVal['type'];
		if (this.m_type==TXT_EDIT_TYPE_EXISTING)
		{
			this.StartEdit(initVal['obj']);
		}
	}
	
	///////////////////////////////////////////////
	//end tool interface
	
	this.imposeMaxEditLength = function()
	{
		var text = this.innerHTML;
		if (text.length > this.m_maxLength)
			this.innerHTML = text.slice(0,this.m_maxLength);
	}
	
	this.CreateEdit = function()
	{
		this.m_edit = document.createElement('TEXTAREA');
		this.m_edit.style.width = 100+'px';
		this.m_edit.style.position = 'absolute';
		this.m_edit.style.top='0px';
		this.m_edit.style.left='0px';	
		this.m_edit.style.overflow='visible';
		this.m_edit.style.textAlign='center';	
		this.m_edit.style.cursor="text";
		this.m_edit.style.fontSize=HEADER_FONT_SIZE;
		this.m_edit.style.fontFamily=HEADER_FONT_FAMILY;
		this.m_edit.style.fontWeight=HEADER_FONT_WEIGHT;
		this.m_edit.setAttribute("name", "TextEdit");
		this.m_edit.id = "TextEdit";
		this.m_edit.onkeyup = this.imposeMaxEditLength;
		this.m_edit.onkeydown = this.imposeMaxEditLength;
		this.m_edit.onmousedown  = this.imposeMaxEditLength;
		this.m_edit.style.border = "solid 1px #666666";
		g_dc.docBody.appendChild(this.m_edit);
		g_dc.showElem(this.m_edit, false);
	}
	this.CreateEdit();
	
	this.InitEditInput = function(l, t, w, h, fSize, fFam, fWeight, maxchars, textAlign, textPadding, initialText)
	{
		if (!this.m_edit) this.CreateEdit();
		this.m_edit.style.left = l+"px";
		this.m_edit.style.top = t+"px";
		this.m_edit.style.width = w+"px";
		if (h!=null)
			this.m_edit.style.height = h+"px";
		else
			this.m_edit.style.height = "Auto";	
		this.m_edit.style.fontFamily = fFam;
		this.m_edit.style.fontSize = fSize;
		this.m_edit.style.fontWeight = fWeight;
		this.m_edit.style.textAlign = textAlign;
		this.m_edit.style.padding = textPadding;
		
		
		this.m_edit.m_maxLength=maxchars;
		if (IsDefined(initialText))
			this.m_edit.value=initialText;
	}
	
	this.StartEdit=function(obj)
	{	
		try{
		if (!IsDefined(obj.Edit_getText)) //does not support edit interface
			return;
		var pos =obj.Edit_getEditPosition();
		this.InitEditInput(pos.m_left,
							pos.m_top, 
							pos.m_width,
							pos.m_height,
							obj.Edit_getFontSize(),
							obj.Edit_getFontFamily(),
							obj.Edit_getFontWeight(),
							obj.Edit_getMaxChars(),
							obj.Edit_getTextAlign(),
							obj.Edit_getPadding(),
							obj.Edit_getText());
		g_dc.showElem(this.m_edit, true);
		g_dc.maxZ(this.m_edit);
		this.m_edit.focus();
		this.m_edit.select();
		this.m_status = TXT_STATE_EDIT;		
		this.m_edited = obj;			
		}
		catch (err)
		{
			alert(err + "StartEdit");
		}
	}
	
	
	this.StartEditNewHeader =function(x, y)
	{
		this.InitEditInput(x,
							y, 
							200,
							null,
							HEADER_FONT_SIZE,
							HEADER_FONT_FAMILY,
							HEADER_FONT_WEIGHT,
							2000,
							"center",
							"2px 2px 2px 2px");
		g_dc.showElem(this.m_edit, true);
		g_dc.maxZ(this.m_edit);
		this.m_edit.focus();
		this.m_edit.select();
		this.m_status = TXT_STATE_EDIT;						
	}
	
	this.StartEditNewNote =function(x, y)
	{
		this.InitEditInput(x,
							y, 
							200,
							150,
							NOTE_FONT_SIZE,
							NOTE_FONT_FAMILY,
							NOTE_FONT_WEIGHT,
							2000,
							"left",
							"6px 6px 6px 6px");
		g_dc.showElem(this.m_edit, true);
		g_dc.maxZ(this.m_edit);
		this.m_edit.focus();
		this.m_edit.select();
		this.m_status = TXT_STATE_EDIT;						
	}
	
	this.ClearEdit=function()
	{
		this.m_edited = null;
		this.m_edit.value="";
		g_dc.showElem(this.m_edit,false);
		this.m_status = TXT_STATE_NONE;
	}
	
	this.CreateNewNote=function()
	{
		var dv = document.createElement("div");
		if (g_dc.ie)
		dv.setAttribute('className', 'topic_note');
			else
		dv.setAttribute('class', 'topic_note');
		dv.setAttribute('id','newNote'+this.m_lastCreated);
	 	dv.setAttribute('name',"topic_header");
	 	dv.setAttribute('noteID','newNote'+this.m_lastCreated);
	 	dv.setAttribute('X',"0");
	 	dv.setAttribute('Y',"0");
	 	dv.setAttribute('W',"0");
	 	dv.setAttribute('H',"0");
	 	dv.setAttribute('isIcn',"0");
	 	var inner = "<div class = \"noteIconDivTop\" name=\"noteIconDivTop\"><button class = \'clipBarButtonIconize\' name = \'clipButtonIconize\'></button><button class = \'iconButtonDelete\' name = \'clipButtonClose\'></button></div><div class = \"expNoteDivBottom\"><span></span></div>";
	 	dv.innerHTML =inner;
	 	g_dc.docBody.appendChild(dv);
	 	var ret = new NoteObject(dv.id);
	 	g_dc.m_aElements[ret.m_expObj.id] = g_dc.m_aElements[g_dc.m_aElements.length] = ret;
	 	this.m_lastCreated++;
	 	return ret;
	}
	
	this.CreateNewHeader=function()
	{
		var dv = document.createElement("div");
		if (g_dc.ie)
		dv.setAttribute('className', 'topic_header');
			else
		dv.setAttribute('class', 'topic_header');
		dv.setAttribute('id','newHeader'+this.m_lastCreated);
	 	dv.setAttribute('name',"topic_header");
	 	dv.setAttribute('hdrID','newHeader'+this.m_lastCreated);
	 	dv.setAttribute('X',"0");
	 	dv.setAttribute('Y',"0");
	 	dv.setAttribute('W',"0");
	 	dv.setAttribute('H',"0");
	 	dv.innerHTML ="<span></span>";
	 	g_dc.docBody.appendChild(dv);
	 	var ret = new HeaderObject(dv.id);
	 	g_dc.m_aElements[ret.m_obj.id] = g_dc.m_aElements[g_dc.m_aElements.length] = ret;
	 	this.m_lastCreated++;
	 	return ret;
	}
	
	this.GetEditPosition= function()
	{
		return new Rect(this.m_edit.style.top,
						this.m_edit.style.left,
						this.m_edit.offsetWidth,
						this.m_edit.offsetHeight);
	}
	
	
	this.AcceptEdit=function()
	{
		var temp = this.m_edit.value;
		if (this.m_type==TXT_EDIT_TYPE_NEW_HEADER)
		{
			if(IsDefined(this.m_edit.value) && this.m_edit.value!="")
			{
				var newh = this.CreateNewHeader();
				var pos = this.GetEditPosition();
				newh.Edit_setText(temp.slice(0,this.m_edit.m_maxLength));
				newh.Show();
				newh.ResizeTo(pos.m_width, pos.m_height);
				newh.MoveTo(pos.m_left, pos.m_top);
				newh.maximizeZ();
				
			}
		}
		else if (this.m_type==TXT_EDIT_TYPE_EXISTING && this.m_edited)
		{
			if (IsDefined(this.m_edit.value) && this.m_edit.value!="")
			{
				var pos = this.GetEditPosition();
				this.m_edited.Edit_setText(temp.slice(0,this.m_edit.m_maxLength));
				if (IsDefined(this.m_edited.ResizeTo))
					this.m_edited.ResizeTo(pos.m_width, pos.m_height);
			}
		}
		else if (this.m_type==TXT_EDIT_TYPE_NEW_NOTE)
		{
			if(IsDefined(this.m_edit.value) && this.m_edit.value!="")
			{
				var newh = this.CreateNewNote();
				var pos = this.GetEditPosition();
				
				newh.Edit_setText(temp.slice(0,this.m_edit.m_maxLength));
				newh.Show();
				pos.m_top-=20;
				newh.ResizeTo(pos.m_width, pos.m_height);
				newh.MoveTo(pos.m_left, pos.m_top);
				newh.maximizeZ();
				
			}
		}
		this.ClearEdit();
	}
	
	
	this.onDocumentMouseDown = function(e)
	{
		
		src = g_dc.GetEventTarget(e);
		if (src && src.className && src.className=="workingArea")
		{
			if (this.m_status!=TXT_STATE_NONE)
			{
				this.AcceptEdit();
				g_dc.ToggleTextEditMode(false, this.m_type);
			}
			else
			{
				switch(this.m_type)
				{
					case TXT_EDIT_TYPE_NEW_HEADER:
						this.StartEditNewHeader(g_dc.getEventMouseX(e), g_dc.getEventMouseY(e)-20);
						break;
					case TXT_EDIT_TYPE_NEW_NOTE:	
						this.StartEditNewNote(g_dc.getEventMouseX(e), g_dc.getEventMouseY(e)-20);
						break;
				}
			}
		}
		return false;
	}
	
	this.onDocKeyUp = function(e)
	{
		var ev = g_dc.GetEvent(e);
		var code = g_dc.GetEventCode(e);
		if (code==27)
		{
			g_dc.ToggleTextEditMode(false, this.m_type);
		}
	}
	
}

g_TextTool = new TextTool();