/*
Product Name: dhtmlxSuite 
Version: 5.2.0 
Edition: Professional 
License: content of this file is covered by DHTMLX Commercial or Enterprise license. Usage without proper license is prohibited. To obtain it contact sales@dhtmlx.com
Copyright UAB Dinamenta http://www.dhtmlx.com
*/

/**
*     @desc: enables block selection mode in grid
*     @type: public
*     @topic: 0
*/
dhtmlXGridObject.prototype.enableBlockSelection = function(mode)
{
	if (typeof this._bs_mode == "undefined"){
		var self = this;
		this.obj.onmousedown = function(e) {
			if (self._bs_mode) self._OnSelectionStart((e||event),this); return true;
		}
		this._CSVRowDelimiter = this.csv.row;
		this.attachEvent("onResize", function() {self._HideSelection(); return true;});
		this.attachEvent("onGridReconstructed", function() {self._HideSelection(); return true;});
		this.attachEvent("onFilterEnd",this._HideSelection);
	}
	if (mode===false){
		this._bs_mode=false;
		return this._HideSelection();
	} else this._bs_mode=true;

	if (!window.dhx4.isIPad){
		var area = this._clip_area = document.createElement("textarea");
		area.className = "dhx_tab_ignore";
		area.style.cssText = "position:absolute; width:1px; height:1px; overflow:hidden; color:transparent; background-color:transparent; bottom:1px; right:1px; border:none;";

		area.onkeydown=function(e){
	            e=e||event;
	            if (e.keyCode == 86 && (e.ctrlKey || e.metaKey))
					self.pasteBlockFromClipboard()
		};
	    document.body.insertBefore(this._clip_area,document.body.firstChild);

	    dhtmlxEvent(this.entBox,"click",function(){
	        if (!self.editor && self._clip_area)
	            self._clip_area.select();
	    });
	}
}
/**
*     @desc:  affect block selection, so it will copy|paste only visible text , not values behind
*	  @param: mode - true/false
*     @type: public
*     @topic: 0
*/
dhtmlXGridObject.prototype.forceLabelSelection = function(mode)
{
	this._strictText = dhx4.s2b(mode)
}


dhtmlXGridObject.prototype.selectBlock = function(sx, sy, ex, ey)
{
	sy = this.getRowIndex(sy);
	ey = this.getRowIndex(ey);

	this._CreateSelection(sy, sx);
    this._selectionArea = this._RedrawSelectionPos(this.cells2(sy, sx).cell, this.cells2(ey, ex).cell);
    this._ShowSelection();
}

dhtmlXGridObject.prototype._OnSelectionStart = function(event, obj)
{

	var self = this;
	if (event.button == 2) return;
	var src = event.srcElement || event.target;
	if (this.editor){
		if (src.tagName && (src.tagName=="INPUT" || src.tagName=="TEXTAREA"))   return;
		this.editStop();
	}
	
	self.setActive(true);
	var pos = this.getPosition(this.obj);
	var x = event.clientX - pos[0] + (document.body.scrollLeft||(document.documentElement?document.documentElement.scrollLeft:0));
	var y = event.clientY - pos[1] + (document.body.scrollTop||(document.documentElement?document.documentElement.scrollTop:0));
	this._CreateSelection(x-4, y-4);

	if (src == this._selectionObj) {
		this._HideSelection();
		this._startSelectionCell = null;
	} else {
	    while (src && (!src.tagName || src.tagName.toLowerCase() != 'td'))
	        src = src.parentNode;
	    this._startSelectionCell = src;
	}
	
	if (this._startSelectionCell){
		if (!this.callEvent("onBeforeBlockSelected",[this._startSelectionCell.parentNode.idd, this._startSelectionCell._cellIndex]))
			return this._startSelectionCell = null;
	}
	
	    //this._ShowSelection();
	    this.obj.onmousedown = null;
		this.obj[_isIE?"onmouseleave":"onmouseout"] = function(e){ if (self._blsTimer) window.clearTimeout(self._blsTimer); };	    
		this.obj.onmmold=this.obj.onmousemove;
		this._init_pos=[x,y];
	    this._selectionObj.onmousemove = this.obj.onmousemove = function(e) {e = e||event; if (e.preventDefault) e.preventDefault(); else e.returnValue = false;  self._OnSelectionMove(e);}
	    
	    
	    this._oldDMP=document.body.onmouseup;
	    document.body.onmouseup = function(e) {e = e||event; self._OnSelectionStop(e, this); return true; }
	this.callEvent("onBeforeBlockSelection",[]);
	document.body.onselectstart = function(){return false};//avoid text select	    
}

dhtmlXGridObject.prototype._getCellByPos = function(x,y){
	x=x;//+this.objBox.scrollLeft;
	if (this._fake)
		x+=this._fake.objBox.scrollWidth;
	y=y;//+this.objBox.scrollTop;
	var _x=0;
	for (var i=0; i < this.obj.rows.length; i++) {
		y-=this.obj.rows[i].offsetHeight;
		if (y<=0) {
			_x=this.obj.rows[i];
			break;
		}
	}
	if (!_x || !_x.idd) return null;
	for (var i=0; i < this._cCount; i++) {
		x-=this.getColWidth(i);
		if (x<=0) {
			while(true){
				if (_x._childIndexes && _x._childIndexes[i+1]==_x._childIndexes[i])
					_x=_x.previousSibling;
				else {
					return this.cells(_x.idd,i).cell;
				}
				
			}
		}
	}
	return null;
}

dhtmlXGridObject.prototype._OnSelectionMove = function(event)
{ 
	
	var self=this;
	this._ShowSelection();
	var pos = this.getPosition(this.obj);
	var X = event.clientX - pos[0] + (document.body.scrollLeft||(document.documentElement?document.documentElement.scrollLeft:0));
	var Y = event.clientY - pos[1] + (document.body.scrollTop||(document.documentElement?document.documentElement.scrollTop:0));

	if ((Math.abs(this._init_pos[0]-X)<5) && (Math.abs(this._init_pos[1]-Y)<5)) return this._HideSelection();
	
	var temp = this._endSelectionCell;
	if(this._startSelectionCell==null)
 		this._endSelectionCell  = this._startSelectionCell = this.getFirstParentOfType(event.srcElement || event.target,"TD");		
	else
		if (event.srcElement || event.target) {
			if ((event.srcElement || event.target).className == "dhtmlxGrid_selection")
				this._endSelectionCell=(this._getCellByPos(X,Y)||this._endSelectionCell);
			else {
				var t = this.getFirstParentOfType(event.srcElement || event.target,"TD");
				if (t.parentNode.idd) this._endSelectionCell = t;
			}
		}
		
	if (this._endSelectionCell){
		if (!this.callEvent("onBeforeBlockSelected",[this._endSelectionCell.parentNode.idd, this._endSelectionCell._cellIndex]))
			this._endSelectionCell = temp;
	}
	
		/*
	//window.status = pos[0]+'+'+pos[1];
	var prevX = this._selectionObj.startX;
	var prevY = this._selectionObj.startY;
	var diffX = X - prevX;
	var diffY = Y - prevY;
	
	if (diffX < 0) {
        this._selectionObj.style.left = this._selectionObj.startX + diffX + 1+"px";
        diffX = 0 - diffX;
	} else {
		this._selectionObj.style.left = this._selectionObj.startX - 3+"px";
	}
	if (diffY < 0) {
		this._selectionObj.style.top = this._selectionObj.startY + diffY + 1+"px";
        diffY = 0 - diffY;
	} else {
		this._selectionObj.style.top = this._selectionObj.startY - 3+"px";
	}
    this._selectionObj.style.width = (diffX>4?diffX-4:0) + 'px';
    this._selectionObj.style.height = (diffY>4?diffY-4:0) + 'px';


/* AUTO SCROLL */
	var BottomRightX = this.objBox.scrollLeft + this.objBox.clientWidth;
	var BottomRightY = this.objBox.scrollTop + this.objBox.clientHeight;
	var TopLeftX = this.objBox.scrollLeft;
	var TopLeftY = this.objBox.scrollTop;

	var nextCall=false;
	if (this._blsTimer) window.clearTimeout(this._blsTimer);	
	
	if (X+20 >= BottomRightX) {
		this.objBox.scrollLeft = this.objBox.scrollLeft+20;
		nextCall=true;
	} else if (X-20 < TopLeftX) {
		this.objBox.scrollLeft = this.objBox.scrollLeft-20;
		nextCall=true;
	}
	if (Y+20 >= BottomRightY && !this._realfake) {
		this.objBox.scrollTop = this.objBox.scrollTop+20;
		nextCall=true;
	} else if (Y-20 < TopLeftY && !this._realfake) {
		this.objBox.scrollTop = this.objBox.scrollTop-20;
		nextCall=true;		
	}
	this._selectionArea = this._RedrawSelectionPos(this._startSelectionCell, this._endSelectionCell);
	

	if (nextCall){ 
		var a=event.clientX;
		var b=event.clientY;
		this._blsTimer=window.setTimeout(function(){self._OnSelectionMove({clientX:a,clientY:b})},100);
	}
	
}

dhtmlXGridObject.prototype._OnSelectionStop = function(event)
{
	var self = this;
	if (this._blsTimer) window.clearTimeout(this._blsTimer);	
	this.obj.onmousedown = function(e) {if (self._bs_mode)  self._OnSelectionStart((e||event), this); return true;}
	this.obj.onmousemove = this.obj.onmmold||null;
	this._selectionObj.onmousemove = null;
	document.body.onmouseup = this._oldDMP||null;
	if ( parseInt( this._selectionObj.style.width ) < 2 && parseInt( this._selectionObj.style.height ) < 2) {
		this._HideSelection();
	} else {
	    var src = this.getFirstParentOfType(event.srcElement || event.target,"TD");
	    if ((!src) || (!src.parentNode.idd)){
	    	src=this._endSelectionCell;
    		}
	    while (src && (!src.tagName || src.tagName.toLowerCase() != 'td'))
	        src = src.parentNode;
	    if (!src) 
	    	return this._HideSelection();
	    this._stopSelectionCell = src;
	    this._selectionArea = this._RedrawSelectionPos(this._startSelectionCell, this._stopSelectionCell);
		this.callEvent("onBlockSelected",[]);
	}
	document.body.onselectstart = function(){};//avoid text select
}

dhtmlXGridObject.prototype._RedrawSelectionPos = function(LeftTop, RightBottom)
{

	if (LeftTop.parentNode.grid != RightBottom.parentNode.grid)
		return this._selectionArea;

//	td._cellIndex
//
//	getRowIndex
	var pos = {};
	pos.LeftTopCol = LeftTop._cellIndex;
	pos.LeftTopRow = this.getRowIndex( LeftTop.parentNode.idd );
	pos.RightBottomCol = RightBottom._cellIndex;
	pos.RightBottomRow = this.getRowIndex( RightBottom.parentNode.idd );

	var LeftTop_width = LeftTop.offsetWidth;
	var LeftTop_height = LeftTop.offsetHeight;
	LeftTop = this.getPosition(LeftTop, this.obj);

	var RightBottom_width = RightBottom.offsetWidth;
	var RightBottom_height = RightBottom.offsetHeight;
	RightBottom = this.getPosition(RightBottom, this.obj);

    if (LeftTop[0] < RightBottom[0]) {
		var Left = LeftTop[0];
		var Right = RightBottom[0] + RightBottom_width;
    } else {
    	var foo = pos.RightBottomCol;
        pos.RightBottomCol = pos.LeftTopCol;
        pos.LeftTopCol = foo;
		var Left = RightBottom[0];
		var Right = LeftTop[0] + LeftTop_width;
    }

    if (LeftTop[1] < RightBottom[1]) {
		var Top = LeftTop[1];
		var Bottom = RightBottom[1] + RightBottom_height;
    } else {
    	var foo = pos.RightBottomRow;
        pos.RightBottomRow = pos.LeftTopRow;
        pos.LeftTopRow = foo;
		var Top = RightBottom[1];
		var Bottom = LeftTop[1] + LeftTop_height;
    }

    var Width = Right - Left;
    var Height = Bottom - Top;

	this._selectionObj.style.left = Left + 'px';
	this._selectionObj.style.top = Top + 'px';
	this._selectionObj.style.width =  Width  + 'px';
	this._selectionObj.style.height = Height + 'px';
	return pos;
}

dhtmlXGridObject.prototype._CreateSelection = function(x, y)
{
	if (this._selectionObj == null) {
		var div = document.createElement('div');
		div.style.position = 'absolute';
        div.style.display = 'none';
        div.className = 'dhtmlxGrid_selection';
		this._selectionObj = div;
		this._selectionObj.onmousedown = function(e){
			e=e||event;
			if (e.button==2 || (_isMacOS&&e.ctrlKey))
				return this.parentNode.grid.callEvent("onBlockRightClick", ["BLOCK",e]);
		}
		this._selectionObj.oncontextmenu=function(e){(e||event).cancelBubble=true;return false;}
		this.objBox.appendChild(this._selectionObj);
	}
    //this._selectionObj.style.border = '1px solid #83abeb';
    this._selectionObj.style.width = '0px';
    this._selectionObj.style.height = '0px';
    //this._selectionObj.style.border = '0px';
	this._selectionObj.style.left = x + 'px';
	this._selectionObj.style.top  = y + 'px';
    this._selectionObj.startX = x;
    this._selectionObj.startY = y;
}

dhtmlXGridObject.prototype._ShowSelection = function()
{
	if (this._selectionObj)
	    this._selectionObj.style.display = '';
}

dhtmlXGridObject.prototype._HideSelection = function()
{
	
	if (this._selectionObj)
	    this._selectionObj.style.display = 'none';
    this._selectionArea = null;
    if (this._clip_area){
    	this._clip_area.value="";
    	this._clip_area.blur();
    }
}
/**
*     @desc: copy content of block selection into clipboard in csv format (delimiter as set for csv serialization)
*     @type: public
*     @topic: 0
*/
dhtmlXGridObject.prototype.copyBlockToClipboard = function()
{
	if (!this._clip_area) return;

	if ( this._selectionArea != null ) {
		var serialized = new Array();
	if (this._mathSerialization)
         this._agetm="getMathValue";
    else if (this._strictText)
    	this._agetm="getTitle";
    else this._agetm="getValue";

    this._serialize_visible = true;

		for (var i=this._selectionArea.LeftTopRow; i<=this._selectionArea.RightBottomRow; i++) {
			var data = this._serializeRowToCVS(this.rowsBuffer[i], null,  this._selectionArea.LeftTopCol, this._selectionArea.RightBottomCol+1);
			if (!this._csvAID)
				serialized[serialized.length] = data.substr( data.indexOf( this.csv.cell ) + 1 );	//remove row ID and add to array
			else
				serialized[serialized.length] = data;
		}
		serialized = serialized.join(this._CSVRowDelimiter);
		
		this._clip_area.value = serialized;
        this._clip_area.select();

	this._serialize_visible = false;
	}
}
/**
*     @desc: paste content of clipboard into block selection of grid
*     @type: public
*     @topic: 0
*/
dhtmlXGridObject.prototype.pasteBlockFromClipboard = function(){
	if (!this._clip_area) return;

	this._clip_area.select();
    var self = this;
    window.setTimeout(function(){
        self._pasteBlockFromClipboard();
        self=null;
    },1);
}
dhtmlXGridObject.prototype._pasteBlockFromClipboard = function()
{
	var serialized = this._clip_area.value;
	if (!serialized) return;

    if (this._selectionArea != null) {
        var startRow = this._selectionArea.LeftTopRow;
        var startCol = this._selectionArea.LeftTopCol;
    } else if (this.cell != null && !this.editor) {
        var startRow = this.getRowIndex( this.cell.parentNode.idd );
        var startCol = this.cell._cellIndex;
    } else {
        return false;
    }

	serialized = this.csvParser.unblock(serialized, this.csv.cell, this.csv.row);

    var endRow = startRow+serialized.length;
    var endCol = startCol+serialized[0].length;
    if (endCol > this._cCount)
		endCol = this._cCount;
    var k = 0;
    for (var i=startRow; i<endRow; i++) {
        var row = this.render_row(i);
        if (row==-1) continue;
        var l = 0;
        for (var j=startCol; j<endCol; j++) {
        	if (this._hrrar[j] && !this._fake){
        		endCol = Math.min(endCol+1, this._cCount);
        		continue;
        	}
        	var ed = this.cells3(row, j);
        	if (ed.isDisabled()) {
        	    l++;
        	    continue;
        	}
        	if (this._onEditUndoRedo)
        		this._onEditUndoRedo(2, row.idd, j, serialized[ k ][ l ], ed.getValue());
        	if (ed.combo){
				var comboVa = ed.combo.values;
				for(var n=0; n<comboVa.length; n++)
					if (serialized[ k ][ l ] == comboVa[n]){
						ed.setValue( ed.combo.keys[ n ]);
						comboVa=null;
						break;
					}
				if (comboVa!=null && ed.editable) ed.setValue( serialized[ k ][ l++ ] );
				else l++;
        	}else
        		ed[ ed.setImage ? "setLabel" : "setValue" ]( serialized[ k ][ l++ ] );
        	ed.cell.wasChanged=true;
        }
        this.callEvent("onRowPaste",[row.idd])
        k++;
    }
}

dhtmlXGridObject.prototype.getSelectedBlock = function() {
	// if block selection exists
	if (this._selectionArea)
		return this._selectionArea;
	else if (this.getSelectedRowId() !== null){
		// if one cell is selected
			return {
				LeftTopRow: this.getSelectedRowId(),
				LeftTopCol: this.getSelectedCellIndex(),
				RightBottomRow: this.getSelectedRowId(),
				RightBottomCol: this.getSelectedCellIndex()
			};
		} else
			return null;
};
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