jQuery.tableDnD={currentTable:null,dragObject:null,mouseOffset:null,oldY:0,build:function(options){this.each(function(){this.tableDnDConfig=jQuery.extend({onDragStyle:null,onDropStyle:null,onDragClass:"tDnD_whileDrag",onDrop:null,onDragStart:null,scrollAmount:5,serializeRegexp:/[^\-]*$/,serializeParamName:null,dragHandle:null},options||{});jQuery.tableDnD.makeDraggable(this);});jQuery(document).bind('mousemove',jQuery.tableDnD.mousemove).bind('mouseup',jQuery.tableDnD.mouseup);return this;},makeDraggable:function(table){var config=table.tableDnDConfig;if(table.tableDnDConfig.dragHandle){var cells=jQuery("td."+table.tableDnDConfig.dragHandle,table);cells.each(function(){jQuery(this).mousedown(function(ev){jQuery.tableDnD.dragObject=this.parentNode;jQuery.tableDnD.currentTable=table;jQuery.tableDnD.mouseOffset=jQuery.tableDnD.getMouseOffset(this,ev);if(config.onDragStart){config.onDragStart(table,this);}
return false;});})}else{var rows=jQuery("tr",table);rows.each(function(){var row=jQuery(this);if(!row.hasClass("nodrag")){row.mousedown(function(ev){if(ev.target.tagName=="TD"){jQuery.tableDnD.dragObject=this;jQuery.tableDnD.currentTable=table;jQuery.tableDnD.mouseOffset=jQuery.tableDnD.getMouseOffset(this,ev);if(config.onDragStart){config.onDragStart(table,this);}
return false;}}).css("cursor","move");}});}},updateTables:function(){this.each(function(){if(this.tableDnDConfig){jQuery.tableDnD.makeDraggable(this);}})},mouseCoords:function(ev){if(ev.pageX||ev.pageY){return{x:ev.pageX,y:ev.pageY};}
return{x:ev.clientX+document.body.scrollLeft-document.body.clientLeft,y:ev.clientY+document.body.scrollTop-document.body.clientTop};},getMouseOffset:function(target,ev){ev=ev||window.event;var docPos=this.getPosition(target);var mousePos=this.mouseCoords(ev);return{x:mousePos.x-docPos.x,y:mousePos.y-docPos.y};},getPosition:function(e){var left=0;var top=0;if(e.offsetHeight==0){e=e.firstChild;}
while(e.offsetParent){left+=e.offsetLeft;top+=e.offsetTop;e=e.offsetParent;}
left+=e.offsetLeft;top+=e.offsetTop;return{x:left,y:top};},mousemove:function(ev){if(jQuery.tableDnD.dragObject==null){return;}
var dragObj=jQuery(jQuery.tableDnD.dragObject);var config=jQuery.tableDnD.currentTable.tableDnDConfig;var mousePos=jQuery.tableDnD.mouseCoords(ev);var y=mousePos.y-jQuery.tableDnD.mouseOffset.y;var yOffset=window.pageYOffset;if(document.all){if(typeof document.compatMode!='undefined'&&document.compatMode!='BackCompat'){yOffset=document.documentElement.scrollTop;}
else if(typeof document.body!='undefined'){yOffset=document.body.scrollTop;}}
if(mousePos.y-yOffset<config.scrollAmount){window.scrollBy(0,-config.scrollAmount);}else{var windowHeight=window.innerHeight?window.innerHeight:document.documentElement.clientHeight?document.documentElement.clientHeight:document.body.clientHeight;if(windowHeight-(mousePos.y-yOffset)<config.scrollAmount){window.scrollBy(0,config.scrollAmount);}}
if(y!=jQuery.tableDnD.oldY){var movingDown=y>jQuery.tableDnD.oldY;jQuery.tableDnD.oldY=y;if(config.onDragClass){dragObj.addClass(config.onDragClass);}else{dragObj.css(config.onDragStyle);}
var currentRow=jQuery.tableDnD.findDropTargetRow(dragObj,y);if(currentRow){if(movingDown&&jQuery.tableDnD.dragObject!=currentRow){jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject,currentRow.nextSibling);}else if(!movingDown&&jQuery.tableDnD.dragObject!=currentRow){jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject,currentRow);}}}
return false;},findDropTargetRow:function(draggedRow,y){var rows=jQuery.tableDnD.currentTable.rows;for(var i=0;i<rows.length;i++){var row=rows[i];var rowY=this.getPosition(row).y;var rowHeight=parseInt(row.offsetHeight)/2;if(row.offsetHeight==0){rowY=this.getPosition(row.firstChild).y;rowHeight=parseInt(row.firstChild.offsetHeight)/2;}
if((y>rowY-rowHeight)&&(y<(rowY+rowHeight))){if(row==draggedRow){return null;}
var config=jQuery.tableDnD.currentTable.tableDnDConfig;if(config.onAllowDrop){if(config.onAllowDrop(draggedRow,row)){return row;}else{return null;}}else{var nodrop=jQuery(row).hasClass("nodrop");if(!nodrop){return row;}else{return null;}}
return row;}}
return null;},mouseup:function(e){if(jQuery.tableDnD.currentTable&&jQuery.tableDnD.dragObject){var droppedRow=jQuery.tableDnD.dragObject;var config=jQuery.tableDnD.currentTable.tableDnDConfig;if(config.onDragClass){jQuery(droppedRow).removeClass(config.onDragClass);}else{jQuery(droppedRow).css(config.onDropStyle);}
jQuery.tableDnD.dragObject=null;if(config.onDrop){config.onDrop(jQuery.tableDnD.currentTable,droppedRow);}
jQuery.tableDnD.currentTable=null;}},serialize:function(){if(jQuery.tableDnD.currentTable){return jQuery.tableDnD.serializeTable(jQuery.tableDnD.currentTable);}else{return"Error: No Table id set, you need to set an id on your table and every row";}},serializeTable:function(table){var result="";var tableId=table.id;var rows=table.rows;for(var i=0;i<rows.length;i++){if(result.length>0)result+="&";var rowId=rows[i].id;if(rowId&&rowId&&table.tableDnDConfig&&table.tableDnDConfig.serializeRegexp){rowId=rowId.match(table.tableDnDConfig.serializeRegexp)[0];}
result+=tableId+'[]='+rowId;}
return result;},serializeTables:function(){var result="";this.each(function(){result+=jQuery.tableDnD.serializeTable(this);});return result;}}
jQuery.fn.extend({tableDnD:jQuery.tableDnD.build,tableDnDUpdate:jQuery.tableDnD.updateTables,tableDnDSerialize:jQuery.tableDnD.serializeTables});