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ScoDoc/static/DataTables/ColReorder-1.3.3/js/dataTables.colReorder.js

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/*! ColReorder 1.3.3
* ©2010-2015 SpryMedia Ltd - datatables.net/license
*/
/**
* @summary ColReorder
* @description Provide the ability to reorder columns in a DataTable
* @version 1.3.3
* @file dataTables.colReorder.js
* @author SpryMedia Ltd (www.sprymedia.co.uk)
* @contact www.sprymedia.co.uk/contact
* @copyright Copyright 2010-2014 SpryMedia Ltd.
*
* This source file is free software, available under the following license:
* MIT license - http://datatables.net/license/mit
*
* This source file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
*
* For details please refer to: http://www.datatables.net
*/
(function( factory ){
if ( typeof define === 'function' && define.amd ) {
// AMD
define( ['jquery', 'datatables.net'], function ( $ ) {
return factory( $, window, document );
} );
}
else if ( typeof exports === 'object' ) {
// CommonJS
module.exports = function (root, $) {
if ( ! root ) {
root = window;
}
if ( ! $ || ! $.fn.dataTable ) {
$ = require('datatables.net')(root, $).$;
}
return factory( $, root, root.document );
};
}
else {
// Browser
factory( jQuery, window, document );
}
}(function( $, window, document, undefined ) {
'use strict';
var DataTable = $.fn.dataTable;
/**
* Switch the key value pairing of an index array to be value key (i.e. the old value is now the
* key). For example consider [ 2, 0, 1 ] this would be returned as [ 1, 2, 0 ].
* @method fnInvertKeyValues
* @param array aIn Array to switch around
* @returns array
*/
function fnInvertKeyValues( aIn )
{
var aRet=[];
for ( var i=0, iLen=aIn.length ; i<iLen ; i++ )
{
aRet[ aIn[i] ] = i;
}
return aRet;
}
/**
* Modify an array by switching the position of two elements
* @method fnArraySwitch
* @param array aArray Array to consider, will be modified by reference (i.e. no return)
* @param int iFrom From point
* @param int iTo Insert point
* @returns void
*/
function fnArraySwitch( aArray, iFrom, iTo )
{
var mStore = aArray.splice( iFrom, 1 )[0];
aArray.splice( iTo, 0, mStore );
}
/**
* Switch the positions of nodes in a parent node (note this is specifically designed for
* table rows). Note this function considers all element nodes under the parent!
* @method fnDomSwitch
* @param string sTag Tag to consider
* @param int iFrom Element to move
* @param int Point to element the element to (before this point), can be null for append
* @returns void
*/
function fnDomSwitch( nParent, iFrom, iTo )
{
var anTags = [];
for ( var i=0, iLen=nParent.childNodes.length ; i<iLen ; i++ )
{
if ( nParent.childNodes[i].nodeType == 1 )
{
anTags.push( nParent.childNodes[i] );
}
}
var nStore = anTags[ iFrom ];
if ( iTo !== null )
{
nParent.insertBefore( nStore, anTags[iTo] );
}
else
{
nParent.appendChild( nStore );
}
}
/**
* Plug-in for DataTables which will reorder the internal column structure by taking the column
* from one position (iFrom) and insert it into a given point (iTo).
* @method $.fn.dataTableExt.oApi.fnColReorder
* @param object oSettings DataTables settings object - automatically added by DataTables!
* @param int iFrom Take the column to be repositioned from this point
* @param int iTo and insert it into this point
* @param bool drop Indicate if the reorder is the final one (i.e. a drop)
* not a live reorder
* @param bool invalidateRows speeds up processing if false passed
* @returns void
*/
$.fn.dataTableExt.oApi.fnColReorder = function ( oSettings, iFrom, iTo, drop, invalidateRows )
{
var i, iLen, j, jLen, jen, iCols=oSettings.aoColumns.length, nTrs, oCol;
var attrMap = function ( obj, prop, mapping ) {
if ( ! obj[ prop ] || typeof obj[ prop ] === 'function' ) {
return;
}
var a = obj[ prop ].split('.');
var num = a.shift();
if ( isNaN( num*1 ) ) {
return;
}
obj[ prop ] = mapping[ num*1 ]+'.'+a.join('.');
};
/* Sanity check in the input */
if ( iFrom == iTo )
{
/* Pointless reorder */
return;
}
if ( iFrom < 0 || iFrom >= iCols )
{
this.oApi._fnLog( oSettings, 1, "ColReorder 'from' index is out of bounds: "+iFrom );
return;
}
if ( iTo < 0 || iTo >= iCols )
{
this.oApi._fnLog( oSettings, 1, "ColReorder 'to' index is out of bounds: "+iTo );
return;
}
/*
* Calculate the new column array index, so we have a mapping between the old and new
*/
var aiMapping = [];
for ( i=0, iLen=iCols ; i<iLen ; i++ )
{
aiMapping[i] = i;
}
fnArraySwitch( aiMapping, iFrom, iTo );
var aiInvertMapping = fnInvertKeyValues( aiMapping );
/*
* Convert all internal indexing to the new column order indexes
*/
/* Sorting */
for ( i=0, iLen=oSettings.aaSorting.length ; i<iLen ; i++ )
{
oSettings.aaSorting[i][0] = aiInvertMapping[ oSettings.aaSorting[i][0] ];
}
/* Fixed sorting */
if ( oSettings.aaSortingFixed !== null )
{
for ( i=0, iLen=oSettings.aaSortingFixed.length ; i<iLen ; i++ )
{
oSettings.aaSortingFixed[i][0] = aiInvertMapping[ oSettings.aaSortingFixed[i][0] ];
}
}
/* Data column sorting (the column which the sort for a given column should take place on) */
for ( i=0, iLen=iCols ; i<iLen ; i++ )
{
oCol = oSettings.aoColumns[i];
for ( j=0, jLen=oCol.aDataSort.length ; j<jLen ; j++ )
{
oCol.aDataSort[j] = aiInvertMapping[ oCol.aDataSort[j] ];
}
// Update the column indexes
oCol.idx = aiInvertMapping[ oCol.idx ];
}
// Update 1.10 optimised sort class removal variable
$.each( oSettings.aLastSort, function (i, val) {
oSettings.aLastSort[i].src = aiInvertMapping[ val.src ];
} );
/* Update the Get and Set functions for each column */
for ( i=0, iLen=iCols ; i<iLen ; i++ )
{
oCol = oSettings.aoColumns[i];
if ( typeof oCol.mData == 'number' ) {
oCol.mData = aiInvertMapping[ oCol.mData ];
}
else if ( $.isPlainObject( oCol.mData ) ) {
// HTML5 data sourced
attrMap( oCol.mData, '_', aiInvertMapping );
attrMap( oCol.mData, 'filter', aiInvertMapping );
attrMap( oCol.mData, 'sort', aiInvertMapping );
attrMap( oCol.mData, 'type', aiInvertMapping );
}
}
/*
* Move the DOM elements
*/
if ( oSettings.aoColumns[iFrom].bVisible )
{
/* Calculate the current visible index and the point to insert the node before. The insert
* before needs to take into account that there might not be an element to insert before,
* in which case it will be null, and an appendChild should be used
*/
var iVisibleIndex = this.oApi._fnColumnIndexToVisible( oSettings, iFrom );
var iInsertBeforeIndex = null;
i = iTo < iFrom ? iTo : iTo + 1;
while ( iInsertBeforeIndex === null && i < iCols )
{
iInsertBeforeIndex = this.oApi._fnColumnIndexToVisible( oSettings, i );
i++;
}
/* Header */
nTrs = oSettings.nTHead.getElementsByTagName('tr');
for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
{
fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
}
/* Footer */
if ( oSettings.nTFoot !== null )
{
nTrs = oSettings.nTFoot.getElementsByTagName('tr');
for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
{
fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
}
}
/* Body */
for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
{
if ( oSettings.aoData[i].nTr !== null )
{
fnDomSwitch( oSettings.aoData[i].nTr, iVisibleIndex, iInsertBeforeIndex );
}
}
}
/*
* Move the internal array elements
*/
/* Columns */
fnArraySwitch( oSettings.aoColumns, iFrom, iTo );
// regenerate the get / set functions
for ( i=0, iLen=iCols ; i<iLen ; i++ ) {
oSettings.oApi._fnColumnOptions( oSettings, i, {} );
}
/* Search columns */
fnArraySwitch( oSettings.aoPreSearchCols, iFrom, iTo );
/* Array array - internal data anodes cache */
for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
{
var data = oSettings.aoData[i];
var cells = data.anCells;
if ( cells ) {
fnArraySwitch( cells, iFrom, iTo );
// Longer term, should this be moved into the DataTables' invalidate
// methods?
for ( j=0, jen=cells.length ; j<jen ; j++ ) {
if ( cells[j] && cells[j]._DT_CellIndex ) {
cells[j]._DT_CellIndex.column = j;
}
}
}
// For DOM sourced data, the invalidate will reread the cell into
// the data array, but for data sources as an array, they need to
// be flipped
if ( data.src !== 'dom' && $.isArray( data._aData ) ) {
fnArraySwitch( data._aData, iFrom, iTo );
}
}
/* Reposition the header elements in the header layout array */
for ( i=0, iLen=oSettings.aoHeader.length ; i<iLen ; i++ )
{
fnArraySwitch( oSettings.aoHeader[i], iFrom, iTo );
}
if ( oSettings.aoFooter !== null )
{
for ( i=0, iLen=oSettings.aoFooter.length ; i<iLen ; i++ )
{
fnArraySwitch( oSettings.aoFooter[i], iFrom, iTo );
}
}
if ( invalidateRows || invalidateRows === undefined )
{
$.fn.dataTable.Api( oSettings ).rows().invalidate();
}
/*
* Update DataTables' event handlers
*/
/* Sort listener */
for ( i=0, iLen=iCols ; i<iLen ; i++ )
{
$(oSettings.aoColumns[i].nTh).off('click.DT');
this.oApi._fnSortAttachListener( oSettings, oSettings.aoColumns[i].nTh, i );
}
/* Fire an event so other plug-ins can update */
$(oSettings.oInstance).trigger( 'column-reorder.dt', [ oSettings, {
from: iFrom,
to: iTo,
mapping: aiInvertMapping,
drop: drop,
// Old style parameters for compatibility
iFrom: iFrom,
iTo: iTo,
aiInvertMapping: aiInvertMapping
} ] );
};
/**
* ColReorder provides column visibility control for DataTables
* @class ColReorder
* @constructor
* @param {object} dt DataTables settings object
* @param {object} opts ColReorder options
*/
var ColReorder = function( dt, opts )
{
var settings = new $.fn.dataTable.Api( dt ).settings()[0];
// Ensure that we can't initialise on the same table twice
if ( settings._colReorder ) {
return settings._colReorder;
}
// Allow the options to be a boolean for defaults
if ( opts === true ) {
opts = {};
}
// Convert from camelCase to Hungarian, just as DataTables does
var camelToHungarian = $.fn.dataTable.camelToHungarian;
if ( camelToHungarian ) {
camelToHungarian( ColReorder.defaults, ColReorder.defaults, true );
camelToHungarian( ColReorder.defaults, opts || {} );
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Public class variables
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* @namespace Settings object which contains customisable information for ColReorder instance
*/
this.s = {
/**
* DataTables settings object
* @property dt
* @type Object
* @default null
*/
"dt": null,
/**
* Initialisation object used for this instance
* @property init
* @type object
* @default {}
*/
"init": $.extend( true, {}, ColReorder.defaults, opts ),
/**
* Number of columns to fix (not allow to be reordered)
* @property fixed
* @type int
* @default 0
*/
"fixed": 0,
/**
* Number of columns to fix counting from right (not allow to be reordered)
* @property fixedRight
* @type int
* @default 0
*/
"fixedRight": 0,
/**
* Callback function for once the reorder has been done
* @property reorderCallback
* @type function
* @default null
*/
"reorderCallback": null,
/**
* @namespace Information used for the mouse drag
*/
"mouse": {
"startX": -1,
"startY": -1,
"offsetX": -1,
"offsetY": -1,
"target": -1,
"targetIndex": -1,
"fromIndex": -1
},
/**
* Information which is used for positioning the insert cusor and knowing where to do the
* insert. Array of objects with the properties:
* x: x-axis position
* to: insert point
* @property aoTargets
* @type array
* @default []
*/
"aoTargets": []
};
/**
* @namespace Common and useful DOM elements for the class instance
*/
this.dom = {
/**
* Dragging element (the one the mouse is moving)
* @property drag
* @type element
* @default null
*/
"drag": null,
/**
* The insert cursor
* @property pointer
* @type element
* @default null
*/
"pointer": null
};
/* Constructor logic */
this.s.dt = settings;
this.s.dt._colReorder = this;
this._fnConstruct();
return this;
};
$.extend( ColReorder.prototype, {
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Public methods
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* Reset the column ordering to the original ordering that was detected on
* start up.
* @return {this} Returns `this` for chaining.
*
* @example
* // DataTables initialisation with ColReorder
* var table = $('#example').dataTable( {
* "sDom": 'Rlfrtip'
* } );
*
* // Add click event to a button to reset the ordering
* $('#resetOrdering').click( function (e) {
* e.preventDefault();
* $.fn.dataTable.ColReorder( table ).fnReset();
* } );
*/
"fnReset": function ()
{
this._fnOrderColumns( this.fnOrder() );
return this;
},
/**
* `Deprecated` - Get the current order of the columns, as an array.
* @return {array} Array of column identifiers
* @deprecated `fnOrder` should be used in preference to this method.
* `fnOrder` acts as a getter/setter.
*/
"fnGetCurrentOrder": function ()
{
return this.fnOrder();
},
/**
* Get the current order of the columns, as an array. Note that the values
* given in the array are unique identifiers for each column. Currently
* these are the original ordering of the columns that was detected on
* start up, but this could potentially change in future.
* @return {array} Array of column identifiers
*
* @example
* // Get column ordering for the table
* var order = $.fn.dataTable.ColReorder( dataTable ).fnOrder();
*//**
* Set the order of the columns, from the positions identified in the
* ordering array given. Note that ColReorder takes a brute force approach
* to reordering, so it is possible multiple reordering events will occur
* before the final order is settled upon.
* @param {array} [set] Array of column identifiers in the new order. Note
* that every column must be included, uniquely, in this array.
* @return {this} Returns `this` for chaining.
*
* @example
* // Swap the first and second columns
* $.fn.dataTable.ColReorder( dataTable ).fnOrder( [1, 0, 2, 3, 4] );
*
* @example
* // Move the first column to the end for the table `#example`
* var curr = $.fn.dataTable.ColReorder( '#example' ).fnOrder();
* var first = curr.shift();
* curr.push( first );
* $.fn.dataTable.ColReorder( '#example' ).fnOrder( curr );
*
* @example
* // Reverse the table's order
* $.fn.dataTable.ColReorder( '#example' ).fnOrder(
* $.fn.dataTable.ColReorder( '#example' ).fnOrder().reverse()
* );
*/
"fnOrder": function ( set, original )
{
var a = [], i, ien, j, jen;
var columns = this.s.dt.aoColumns;
if ( set === undefined ){
for ( i=0, ien=columns.length ; i<ien ; i++ ) {
a.push( columns[i]._ColReorder_iOrigCol );
}
return a;
}
// The order given is based on the original indexes, rather than the
// existing ones, so we need to translate from the original to current
// before then doing the order
if ( original ) {
var order = this.fnOrder();
for ( i=0, ien=set.length ; i<ien ; i++ ) {
a.push( $.inArray( set[i], order ) );
}
set = a;
}
this._fnOrderColumns( fnInvertKeyValues( set ) );
return this;
},
/**
* Convert from the original column index, to the original
*
* @param {int|array} idx Index(es) to convert
* @param {string} dir Transpose direction - `fromOriginal` / `toCurrent`
* or `'toOriginal` / `fromCurrent`
* @return {int|array} Converted values
*/
fnTranspose: function ( idx, dir )
{
if ( ! dir ) {
dir = 'toCurrent';
}
var order = this.fnOrder();
var columns = this.s.dt.aoColumns;
if ( dir === 'toCurrent' ) {
// Given an original index, want the current
return ! $.isArray( idx ) ?
$.inArray( idx, order ) :
$.map( idx, function ( index ) {
return $.inArray( index, order );
} );
}
else {
// Given a current index, want the original
return ! $.isArray( idx ) ?
columns[idx]._ColReorder_iOrigCol :
$.map( idx, function ( index ) {
return columns[index]._ColReorder_iOrigCol;
} );
}
},
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Private methods (they are of course public in JS, but recommended as private)
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* Constructor logic
* @method _fnConstruct
* @returns void
* @private
*/
"_fnConstruct": function ()
{
var that = this;
var iLen = this.s.dt.aoColumns.length;
var table = this.s.dt.nTable;
var i;
/* Columns discounted from reordering - counting left to right */
if ( this.s.init.iFixedColumns )
{
this.s.fixed = this.s.init.iFixedColumns;
}
if ( this.s.init.iFixedColumnsLeft )
{
this.s.fixed = this.s.init.iFixedColumnsLeft;
}
/* Columns discounted from reordering - counting right to left */
this.s.fixedRight = this.s.init.iFixedColumnsRight ?
this.s.init.iFixedColumnsRight :
0;
/* Drop callback initialisation option */
if ( this.s.init.fnReorderCallback )
{
this.s.reorderCallback = this.s.init.fnReorderCallback;
}
/* Add event handlers for the drag and drop, and also mark the original column order */
for ( i = 0; i < iLen; i++ )
{
if ( i > this.s.fixed-1 && i < iLen - this.s.fixedRight )
{
this._fnMouseListener( i, this.s.dt.aoColumns[i].nTh );
}
/* Mark the original column order for later reference */
this.s.dt.aoColumns[i]._ColReorder_iOrigCol = i;
}
/* State saving */
this.s.dt.oApi._fnCallbackReg( this.s.dt, 'aoStateSaveParams', function (oS, oData) {
that._fnStateSave.call( that, oData );
}, "ColReorder_State" );
/* An initial column order has been specified */
var aiOrder = null;
if ( this.s.init.aiOrder )
{
aiOrder = this.s.init.aiOrder.slice();
}
/* State loading, overrides the column order given */
if ( this.s.dt.oLoadedState && typeof this.s.dt.oLoadedState.ColReorder != 'undefined' &&
this.s.dt.oLoadedState.ColReorder.length == this.s.dt.aoColumns.length )
{
aiOrder = this.s.dt.oLoadedState.ColReorder;
}
/* If we have an order to apply - do so */
if ( aiOrder )
{
/* We might be called during or after the DataTables initialisation. If before, then we need
* to wait until the draw is done, if after, then do what we need to do right away
*/
if ( !that.s.dt._bInitComplete )
{
var bDone = false;
$(table).on( 'draw.dt.colReorder', function () {
if ( !that.s.dt._bInitComplete && !bDone )
{
bDone = true;
var resort = fnInvertKeyValues( aiOrder );
that._fnOrderColumns.call( that, resort );
}
} );
}
else
{
var resort = fnInvertKeyValues( aiOrder );
that._fnOrderColumns.call( that, resort );
}
}
else {
this._fnSetColumnIndexes();
}
// Destroy clean up
$(table).on( 'destroy.dt.colReorder', function () {
$(table).off( 'destroy.dt.colReorder draw.dt.colReorder' );
$(that.s.dt.nTHead).find( '*' ).off( '.ColReorder' );
$.each( that.s.dt.aoColumns, function (i, column) {
$(column.nTh).removeAttr('data-column-index');
} );
that.s.dt._colReorder = null;
that.s = null;
} );
},
/**
* Set the column order from an array
* @method _fnOrderColumns
* @param array a An array of integers which dictate the column order that should be applied
* @returns void
* @private
*/
"_fnOrderColumns": function ( a )
{
var changed = false;
if ( a.length != this.s.dt.aoColumns.length )
{
this.s.dt.oInstance.oApi._fnLog( this.s.dt, 1, "ColReorder - array reorder does not "+
"match known number of columns. Skipping." );
return;
}
for ( var i=0, iLen=a.length ; i<iLen ; i++ )
{
var currIndex = $.inArray( i, a );
if ( i != currIndex )
{
/* Reorder our switching array */
fnArraySwitch( a, currIndex, i );
/* Do the column reorder in the table */
this.s.dt.oInstance.fnColReorder( currIndex, i, true, false );
changed = true;
}
}
$.fn.dataTable.Api( this.s.dt ).rows().invalidate();
this._fnSetColumnIndexes();
// Has anything actually changed? If not, then nothing else to do
if ( ! changed ) {
return;
}
/* When scrolling we need to recalculate the column sizes to allow for the shift */
if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
{
this.s.dt.oInstance.fnAdjustColumnSizing( false );
}
/* Save the state */
this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
if ( this.s.reorderCallback !== null )
{
this.s.reorderCallback.call( this );
}
},
/**
* Because we change the indexes of columns in the table, relative to their starting point
* we need to reorder the state columns to what they are at the starting point so we can
* then rearrange them again on state load!
* @method _fnStateSave
* @param object oState DataTables state
* @returns string JSON encoded cookie string for DataTables
* @private
*/
"_fnStateSave": function ( oState )
{
var i, iLen, aCopy, iOrigColumn;
var oSettings = this.s.dt;
var columns = oSettings.aoColumns;
oState.ColReorder = [];
/* Sorting */
if ( oState.aaSorting ) {
// 1.10.0-
for ( i=0 ; i<oState.aaSorting.length ; i++ ) {
oState.aaSorting[i][0] = columns[ oState.aaSorting[i][0] ]._ColReorder_iOrigCol;
}
var aSearchCopy = $.extend( true, [], oState.aoSearchCols );
for ( i=0, iLen=columns.length ; i<iLen ; i++ )
{
iOrigColumn = columns[i]._ColReorder_iOrigCol;
/* Column filter */
oState.aoSearchCols[ iOrigColumn ] = aSearchCopy[i];
/* Visibility */
oState.abVisCols[ iOrigColumn ] = columns[i].bVisible;
/* Column reordering */
oState.ColReorder.push( iOrigColumn );
}
}
else if ( oState.order ) {
// 1.10.1+
for ( i=0 ; i<oState.order.length ; i++ ) {
oState.order[i][0] = columns[ oState.order[i][0] ]._ColReorder_iOrigCol;
}
var stateColumnsCopy = $.extend( true, [], oState.columns );
for ( i=0, iLen=columns.length ; i<iLen ; i++ )
{
iOrigColumn = columns[i]._ColReorder_iOrigCol;
/* Columns */
oState.columns[ iOrigColumn ] = stateColumnsCopy[i];
/* Column reordering */
oState.ColReorder.push( iOrigColumn );
}
}
},
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Mouse drop and drag
*/
/**
* Add a mouse down listener to a particluar TH element
* @method _fnMouseListener
* @param int i Column index
* @param element nTh TH element clicked on
* @returns void
* @private
*/
"_fnMouseListener": function ( i, nTh )
{
var that = this;
$(nTh)
.on( 'mousedown.ColReorder', function (e) {
e.preventDefault();
that._fnMouseDown.call( that, e, nTh );
} )
.on( 'touchstart.ColReorder', function (e) {
that._fnMouseDown.call( that, e, nTh );
} );
},
/**
* Mouse down on a TH element in the table header
* @method _fnMouseDown
* @param event e Mouse event
* @param element nTh TH element to be dragged
* @returns void
* @private
*/
"_fnMouseDown": function ( e, nTh )
{
var that = this;
/* Store information about the mouse position */
var target = $(e.target).closest('th, td');
var offset = target.offset();
var idx = parseInt( $(nTh).attr('data-column-index'), 10 );
if ( idx === undefined ) {
return;
}
this.s.mouse.startX = this._fnCursorPosition( e, 'pageX' );
this.s.mouse.startY = this._fnCursorPosition( e, 'pageY' );
this.s.mouse.offsetX = this._fnCursorPosition( e, 'pageX' ) - offset.left;
this.s.mouse.offsetY = this._fnCursorPosition( e, 'pageY' ) - offset.top;
this.s.mouse.target = this.s.dt.aoColumns[ idx ].nTh;//target[0];
this.s.mouse.targetIndex = idx;
this.s.mouse.fromIndex = idx;
this._fnRegions();
/* Add event handlers to the document */
$(document)
.on( 'mousemove.ColReorder touchmove.ColReorder', function (e) {
that._fnMouseMove.call( that, e );
} )
.on( 'mouseup.ColReorder touchend.ColReorder', function (e) {
that._fnMouseUp.call( that, e );
} );
},
/**
* Deal with a mouse move event while dragging a node
* @method _fnMouseMove
* @param event e Mouse event
* @returns void
* @private
*/
"_fnMouseMove": function ( e )
{
var that = this;
if ( this.dom.drag === null )
{
/* Only create the drag element if the mouse has moved a specific distance from the start
* point - this allows the user to make small mouse movements when sorting and not have a
* possibly confusing drag element showing up
*/
if ( Math.pow(
Math.pow(this._fnCursorPosition( e, 'pageX') - this.s.mouse.startX, 2) +
Math.pow(this._fnCursorPosition( e, 'pageY') - this.s.mouse.startY, 2), 0.5 ) < 5 )
{
return;
}
this._fnCreateDragNode();
}
/* Position the element - we respect where in the element the click occured */
this.dom.drag.css( {
left: this._fnCursorPosition( e, 'pageX' ) - this.s.mouse.offsetX,
top: this._fnCursorPosition( e, 'pageY' ) - this.s.mouse.offsetY
} );
/* Based on the current mouse position, calculate where the insert should go */
var bSet = false;
var lastToIndex = this.s.mouse.toIndex;
for ( var i=1, iLen=this.s.aoTargets.length ; i<iLen ; i++ )
{
if ( this._fnCursorPosition(e, 'pageX') < this.s.aoTargets[i-1].x + ((this.s.aoTargets[i].x-this.s.aoTargets[i-1].x)/2) )
{
this.dom.pointer.css( 'left', this.s.aoTargets[i-1].x );
this.s.mouse.toIndex = this.s.aoTargets[i-1].to;
bSet = true;
break;
}
}
// The insert element wasn't positioned in the array (less than
// operator), so we put it at the end
if ( !bSet )
{
this.dom.pointer.css( 'left', this.s.aoTargets[this.s.aoTargets.length-1].x );
this.s.mouse.toIndex = this.s.aoTargets[this.s.aoTargets.length-1].to;
}
// Perform reordering if realtime updating is on and the column has moved
if ( this.s.init.bRealtime && lastToIndex !== this.s.mouse.toIndex ) {
this.s.dt.oInstance.fnColReorder( this.s.mouse.fromIndex, this.s.mouse.toIndex, false );
this.s.mouse.fromIndex = this.s.mouse.toIndex;
this._fnRegions();
}
},
/**
* Finish off the mouse drag and insert the column where needed
* @method _fnMouseUp
* @param event e Mouse event
* @returns void
* @private
*/
"_fnMouseUp": function ( e )
{
var that = this;
$(document).off( '.ColReorder' );
if ( this.dom.drag !== null )
{
/* Remove the guide elements */
this.dom.drag.remove();
this.dom.pointer.remove();
this.dom.drag = null;
this.dom.pointer = null;
/* Actually do the reorder */
this.s.dt.oInstance.fnColReorder( this.s.mouse.fromIndex, this.s.mouse.toIndex, true );
this._fnSetColumnIndexes();
/* When scrolling we need to recalculate the column sizes to allow for the shift */
if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
{
this.s.dt.oInstance.fnAdjustColumnSizing( false );
}
/* Save the state */
this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
if ( this.s.reorderCallback !== null )
{
this.s.reorderCallback.call( this );
}
}
},
/**
* Calculate a cached array with the points of the column inserts, and the
* 'to' points
* @method _fnRegions
* @returns void
* @private
*/
"_fnRegions": function ()
{
var aoColumns = this.s.dt.aoColumns;
this.s.aoTargets.splice( 0, this.s.aoTargets.length );
this.s.aoTargets.push( {
"x": $(this.s.dt.nTable).offset().left,
"to": 0
} );
var iToPoint = 0;
var total = this.s.aoTargets[0].x;
for ( var i=0, iLen=aoColumns.length ; i<iLen ; i++ )
{
/* For the column / header in question, we want it's position to remain the same if the
* position is just to it's immediate left or right, so we only increment the counter for
* other columns
*/
if ( i != this.s.mouse.fromIndex )
{
iToPoint++;
}
if ( aoColumns[i].bVisible && aoColumns[i].nTh.style.display !=='none' )
{
total += $(aoColumns[i].nTh).outerWidth();
this.s.aoTargets.push( {
"x": total,
"to": iToPoint
} );
}
}
/* Disallow columns for being reordered by drag and drop, counting right to left */
if ( this.s.fixedRight !== 0 )
{
this.s.aoTargets.splice( this.s.aoTargets.length - this.s.fixedRight );
}
/* Disallow columns for being reordered by drag and drop, counting left to right */
if ( this.s.fixed !== 0 )
{
this.s.aoTargets.splice( 0, this.s.fixed );
}
},
/**
* Copy the TH element that is being drags so the user has the idea that they are actually
* moving it around the page.
* @method _fnCreateDragNode
* @returns void
* @private
*/
"_fnCreateDragNode": function ()
{
var scrolling = this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "";
var origCell = this.s.dt.aoColumns[ this.s.mouse.targetIndex ].nTh;
var origTr = origCell.parentNode;
var origThead = origTr.parentNode;
var origTable = origThead.parentNode;
var cloneCell = $(origCell).clone();
// This is a slightly odd combination of jQuery and DOM, but it is the
// fastest and least resource intensive way I could think of cloning
// the table with just a single header cell in it.
this.dom.drag = $(origTable.cloneNode(false))
.addClass( 'DTCR_clonedTable' )
.append(
$(origThead.cloneNode(false)).append(
$(origTr.cloneNode(false)).append(
cloneCell[0]
)
)
)
.css( {
position: 'absolute',
top: 0,
left: 0,
width: $(origCell).outerWidth(),
height: $(origCell).outerHeight()
} )
.appendTo( 'body' );
this.dom.pointer = $('<div></div>')
.addClass( 'DTCR_pointer' )
.css( {
position: 'absolute',
top: scrolling ?
$('div.dataTables_scroll', this.s.dt.nTableWrapper).offset().top :
$(this.s.dt.nTable).offset().top,
height : scrolling ?
$('div.dataTables_scroll', this.s.dt.nTableWrapper).height() :
$(this.s.dt.nTable).height()
} )
.appendTo( 'body' );
},
/**
* Add a data attribute to the column headers, so we know the index of
* the row to be reordered. This allows fast detection of the index, and
* for this plug-in to work with FixedHeader which clones the nodes.
* @private
*/
"_fnSetColumnIndexes": function ()
{
$.each( this.s.dt.aoColumns, function (i, column) {
$(column.nTh).attr('data-column-index', i);
} );
},
/**
* Get cursor position regardless of mouse or touch input
* @param {Event} e jQuery Event
* @param {string} prop Property to get
* @return {number} Value
*/
_fnCursorPosition: function ( e, prop ) {
if ( e.type.indexOf('touch') !== -1 ) {
return e.originalEvent.touches[0][ prop ];
}
return e[ prop ];
}
} );
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Static parameters
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* ColReorder default settings for initialisation
* @namespace
* @static
*/
ColReorder.defaults = {
/**
* Predefined ordering for the columns that will be applied automatically
* on initialisation. If not specified then the order that the columns are
* found to be in the HTML is the order used.
* @type array
* @default null
* @static
*/
aiOrder: null,
/**
* Redraw the table's column ordering as the end user draws the column
* (`true`) or wait until the mouse is released (`false` - default). Note
* that this will perform a redraw on each reordering, which involves an
* Ajax request each time if you are using server-side processing in
* DataTables.
* @type boolean
* @default false
* @static
*/
bRealtime: true,
/**
* Indicate how many columns should be fixed in position (counting from the
* left). This will typically be 1 if used, but can be as high as you like.
* @type int
* @default 0
* @static
*/
iFixedColumnsLeft: 0,
/**
* As `iFixedColumnsRight` but counting from the right.
* @type int
* @default 0
* @static
*/
iFixedColumnsRight: 0,
/**
* Callback function that is fired when columns are reordered. The `column-
* reorder` event is preferred over this callback
* @type function():void
* @default null
* @static
*/
fnReorderCallback: null
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Constants
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* ColReorder version
* @constant version
* @type String
* @default As code
*/
ColReorder.version = "1.3.3";
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* DataTables interfaces
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
// Expose
$.fn.dataTable.ColReorder = ColReorder;
$.fn.DataTable.ColReorder = ColReorder;
// Register a new feature with DataTables
if ( typeof $.fn.dataTable == "function" &&
typeof $.fn.dataTableExt.fnVersionCheck == "function" &&
$.fn.dataTableExt.fnVersionCheck('1.10.8') )
{
$.fn.dataTableExt.aoFeatures.push( {
"fnInit": function( settings ) {
var table = settings.oInstance;
if ( ! settings._colReorder ) {
var dtInit = settings.oInit;
var opts = dtInit.colReorder || dtInit.oColReorder || {};
new ColReorder( settings, opts );
}
else {
table.oApi._fnLog( settings, 1, "ColReorder attempted to initialise twice. Ignoring second" );
}
return null; /* No node for DataTables to insert */
},
"cFeature": "R",
"sFeature": "ColReorder"
} );
}
else {
alert( "Warning: ColReorder requires DataTables 1.10.8 or greater - www.datatables.net/download");
}
// Attach a listener to the document which listens for DataTables initialisation
// events so we can automatically initialise
$(document).on( 'preInit.dt.colReorder', function (e, settings) {
if ( e.namespace !== 'dt' ) {
return;
}
var init = settings.oInit.colReorder;
var defaults = DataTable.defaults.colReorder;
if ( init || defaults ) {
var opts = $.extend( {}, init, defaults );
if ( init !== false ) {
new ColReorder( settings, opts );
}
}
} );
// API augmentation
$.fn.dataTable.Api.register( 'colReorder.reset()', function () {
return this.iterator( 'table', function ( ctx ) {
ctx._colReorder.fnReset();
} );
} );
$.fn.dataTable.Api.register( 'colReorder.order()', function ( set, original ) {
if ( set ) {
return this.iterator( 'table', function ( ctx ) {
ctx._colReorder.fnOrder( set, original );
} );
}
return this.context.length ?
this.context[0]._colReorder.fnOrder() :
null;
} );
$.fn.dataTable.Api.register( 'colReorder.transpose()', function ( idx, dir ) {
return this.context.length && this.context[0]._colReorder ?
this.context[0]._colReorder.fnTranspose( idx, dir ) :
idx;
} );
return ColReorder;
}));
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