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assets/plugin/datatables/extensions/KeyTable/js/dataTables.keyTable.js

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+/*! KeyTable 2.1.2
+ * ©2009-2016 SpryMedia Ltd - datatables.net/license
+ */
+
+/**
+ * @summary     KeyTable
+ * @description Spreadsheet like keyboard navigation for DataTables
+ * @version     2.1.2
+ * @file        dataTables.keyTable.js
+ * @author      SpryMedia Ltd (www.sprymedia.co.uk)
+ * @contact     www.sprymedia.co.uk/contact
+ * @copyright   Copyright 2009-2016 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;
+
+
+var KeyTable = function ( dt, opts ) {
+	// Sanity check that we are using DataTables 1.10 or newer
+	if ( ! DataTable.versionCheck || ! DataTable.versionCheck( '1.10.8' ) ) {
+		throw 'KeyTable requires DataTables 1.10.8 or newer';
+	}
+
+	// User and defaults configuration object
+	this.c = $.extend( true, {},
+		DataTable.defaults.keyTable,
+		KeyTable.defaults,
+		opts
+	);
+
+	// Internal settings
+	this.s = {
+		/** @type {DataTable.Api} DataTables' API instance */
+		dt: new DataTable.Api( dt ),
+
+		enable: true,
+
+		/** @type {bool} Flag for if a draw is triggered by focus */
+		focusDraw: false
+	};
+
+	// DOM items
+	this.dom = {
+
+	};
+
+	// Check if row reorder has already been initialised on this table
+	var settings = this.s.dt.settings()[0];
+	var exisiting = settings.keytable;
+	if ( exisiting ) {
+		return exisiting;
+	}
+
+	settings.keytable = this;
+	this._constructor();
+};
+
+
+$.extend( KeyTable.prototype, {
+	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	 * API methods for DataTables API interface
+	 */
+	
+	/**
+	 * Blur the table's cell focus
+	 */
+	blur: function ()
+	{
+		this._blur();
+	},
+
+	/**
+	 * Enable cell focus for the table
+	 *
+	 * @param  {string} state Can be `true`, `false` or `-string navigation-only`
+	 */
+	enable: function ( state )
+	{
+		this.s.enable = state;
+	},
+
+	/**
+	 * Focus on a cell
+	 * @param  {integer} row    Row index
+	 * @param  {integer} column Column index
+	 */
+	focus: function ( row, column )
+	{
+		this._focus( this.s.dt.cell( row, column ) );
+	},
+
+	/**
+	 * Is the cell focused
+	 * @param  {object} cell Cell index to check
+	 * @returns {boolean} true if focused, false otherwise
+	 */
+	focused: function ( cell )
+	{
+		var lastFocus = this.s.lastFocus;
+
+		if ( ! lastFocus ) {
+			return false;
+		}
+
+		var lastIdx = this.s.lastFocus.index();
+		return cell.row === lastIdx.row && cell.column === lastIdx.column;
+	},
+
+
+	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	 * Constructor
+	 */
+
+	/**
+	 * Initialise the KeyTable instance
+	 *
+	 * @private
+	 */
+	_constructor: function ()
+	{
+		this._tabInput();
+
+		var that = this;
+		var dt = this.s.dt;
+		var table = $( dt.table().node() );
+
+		// Need to be able to calculate the cell positions relative to the table
+		if ( table.css('position') === 'static' ) {
+			table.css( 'position', 'relative' );
+		}
+
+		// Click to focus
+		$( dt.table().body() ).on( 'click.keyTable', 'th, td', function () {
+			if ( that.s.enable === false ) {
+				return;
+			}
+
+			var cell = dt.cell( this );
+
+			if ( ! cell.any() ) {
+				return;
+			}
+
+			that._focus( cell, null, false );
+		} );
+
+		// Key events
+		$( document ).on( 'keydown.keyTable', function (e) {
+			that._key( e );
+		} );
+
+		// Click blur
+		if ( this.c.blurable ) {
+			$( document ).on( 'click.keyTable', function ( e ) {
+				// Click on the search input will blur focus
+				if ( $(e.target).parents( '.dataTables_filter' ).length ) {
+					that._blur();
+				}
+
+				// If the click was inside the DataTables container, don't blur
+				if ( $(e.target).parents().filter( dt.table().container() ).length ) {
+					return;
+				}
+
+				// Don't blur in Editor form
+				if ( $(e.target).parents('div.DTE').length ) {
+					return;
+				}
+
+				that._blur();
+			} );
+		}
+
+		if ( this.c.editor ) {
+			dt.on( 'key.keyTable', function ( e, dt, key, cell, orig ) {
+				that._editor( key, orig );
+			} );
+		}
+
+		// Stave saving
+		if ( dt.settings()[0].oFeatures.bStateSave ) {
+			dt.on( 'stateSaveParams.keyTable', function (e, s, d) {
+				d.keyTable = that.s.lastFocus ?
+					that.s.lastFocus.index() :
+					null;
+			} );
+		}
+
+		// Reload - re-focus on the currently selected item. In SSP mode this
+		// has the effect of keeping the focus in position when changing page as
+		// well (which is different from how client-side processing works).
+		dt.on( 'xhr.keyTable', function ( e ) {
+			if ( that.s.focusDraw ) {
+				// Triggered by server-side processing, and thus `_focus` will
+				// do the refocus on the next draw event
+				return;
+			}
+
+			var lastFocus = that.s.lastFocus;
+
+			if ( lastFocus ) {
+				that.s.lastFocus = null;
+
+				dt.one( 'draw', function () {
+					that._focus( lastFocus );
+				} );
+			}
+		} );
+
+		dt.on( 'destroy.keyTable', function () {
+			dt.off( '.keyTable' );
+			$( dt.table().body() ).off( 'click.keyTable', 'th, td' );
+			$( document.body )
+				.off( 'keydown.keyTable' )
+				.off( 'click.keyTable' );
+		} );
+
+		// Initial focus comes from state or options
+		var state = dt.state.loaded();
+
+		if ( state && state.keyTable ) {
+			// Wait until init is done
+			dt.one( 'init', function () {
+				var cell = dt.cell( state.keyTable );
+
+				// Ensure that the saved cell still exists
+				if ( cell.any() ) {
+					cell.focus();
+				}
+			} );
+		}
+		else if ( this.c.focus ) {
+			dt.cell( this.c.focus ).focus();
+		}
+	},
+
+
+
+
+	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	 * Private methods
+	 */
+
+	/**
+	 * Blur the control
+	 *
+	 * @private
+	 */
+	_blur: function ()
+	{
+		if ( ! this.s.enable || ! this.s.lastFocus ) {
+			return;
+		}
+
+		var cell = this.s.lastFocus;
+
+		$( cell.node() ).removeClass( this.c.className );
+		this.s.lastFocus = null;
+
+		this._emitEvent( 'key-blur', [ this.s.dt, cell ] );
+	},
+
+
+	/**
+	 * Get an array of the column indexes that KeyTable can operate on. This
+	 * is a merge of the user supplied columns and the visible columns.
+	 *
+	 * @private
+	 */
+	_columns: function ()
+	{
+		var dt = this.s.dt;
+		var user = dt.columns( this.c.columns ).indexes();
+		var out = [];
+
+		dt.columns( ':visible' ).every( function (i) {
+			if ( user.indexOf( i ) !== -1 ) {
+				out.push( i );
+			}
+		} );
+
+		return out;
+	},
+
+
+	/**
+	 * Perform excel like navigation for Editor by triggering an edit on key
+	 * press
+	 *
+	 * @param  {integer} key Key code for the pressed key
+	 * @param  {object} orig Original event
+	 * @private
+	 */
+	_editor: function ( key, orig )
+	{
+		var dt = this.s.dt;
+		var editor = this.c.editor;
+
+		orig.stopPropagation();
+
+		// Return key should do nothing - for textareas's it would empty the
+		// contents
+		if ( key === 13 ) {
+			orig.preventDefault();
+		}
+
+		editor.inline( this.s.lastFocus.index() );
+
+		// Excel style - select all text
+		var input = $('div.DTE input, div.DTE textarea');
+		if ( input.length ) {
+			input[0].select();
+		}
+
+		// Reduce the keys the Keys listens for
+		dt.keys.enable( 'navigation-only' );
+
+		// On blur of the navigation submit
+		dt.one( 'key-blur.editor', function () {
+			if ( editor.displayed() ) {
+				editor.submit();
+			}
+		} );
+
+		// Restore full key navigation on close
+		editor.one( 'close', function () {
+			dt.keys.enable( true );
+			dt.off( 'key-blur.editor' );
+		} );
+	},
+
+
+	/**
+	 * Emit an event on the DataTable for listeners
+	 *
+	 * @param  {string} name Event name
+	 * @param  {array} args Event arguments
+	 * @private
+	 */
+	_emitEvent: function ( name, args )
+	{
+		this.s.dt.iterator( 'table', function ( ctx, i ) {
+			$(ctx.nTable).triggerHandler( name, args );
+		} );
+	},
+
+
+	/**
+	 * Focus on a particular cell, shifting the table's paging if required
+	 *
+	 * @param  {DataTables.Api|integer} row Can be given as an API instance that
+	 *   contains the cell to focus or as an integer. As the latter it is the
+	 *   visible row index - NOT the data index
+	 * @param  {integer} [column] Not required if a cell is given as the first
+	 *   parameter. Otherwise this is the column data index for the cell to
+	 *   focus on
+	 * @param {boolean} [shift=true] Should the viewport be moved to show cell
+	 * @private
+	 */
+	_focus: function ( row, column, shift )
+	{
+		var that = this;
+		var dt = this.s.dt;
+		var pageInfo = dt.page.info();
+		var lastFocus = this.s.lastFocus;
+
+		if ( ! this.s.enable ) {
+			return;
+		}
+
+		if ( typeof row !== 'number' ) {
+			// Convert the cell to a row and column
+			var index = row.index();
+			column = index.column;
+			row = dt
+				.rows( { filter: 'applied', order: 'applied' } )
+				.indexes()
+				.indexOf( index.row );
+
+			// For server-side processing normalise the row by adding the start
+			// point, since `rows().indexes()` includes only rows that are
+			// available at the client-side
+			if ( pageInfo.serverSide ) {
+				row += pageInfo.start;
+			}
+		}
+
+		// Is the row on the current page? If not, we need to redraw to show the
+		// page
+		if ( pageInfo.length !== -1 && (row < pageInfo.start || row >= pageInfo.start+pageInfo.length) ) {
+			this.s.focusDraw = true;
+
+			dt
+				.one( 'draw', function () {
+					that.s.focusDraw = false;
+					that._focus( row, column );
+				} )
+				.page( Math.floor( row / pageInfo.length ) )
+				.draw( false );
+
+			return;
+		}
+
+		// In the available columns?
+		if ( $.inArray( column, this._columns() ) === -1 ) {
+			return;
+		}
+
+		// De-normalise the server-side processing row, so we select the row
+		// in its displayed position
+		if ( pageInfo.serverSide ) {
+			row -= pageInfo.start;
+		}
+
+		var cell = dt.cell( ':eq('+row+')', column, {search: 'applied'} );
+
+		if ( lastFocus ) {
+			// Don't trigger a refocus on the same cell
+			if ( lastFocus.node() === cell.node() ) {
+				return;
+			}
+
+			// Otherwise blur the old focus
+			this._blur();
+		}
+
+		var node = $( cell.node() );
+		node.addClass( this.c.className );
+
+		// Shift viewpoint and page to make cell visible
+		if ( shift === undefined || shift === true ) {
+			this._scroll( $(window), $(document.body), node, 'offset' );
+
+			var bodyParent = dt.table().body().parentNode;
+			if ( bodyParent !== dt.table().header().parentNode ) {
+				var parent = $(bodyParent.parentNode);
+
+				this._scroll( parent, parent, node, 'position' );
+			}
+		}
+
+		// Event and finish
+		this.s.lastFocus = cell;
+
+		this._emitEvent( 'key-focus', [ this.s.dt, cell ] );
+		dt.state.save();
+	},
+
+
+	/**
+	 * Handle key press
+	 *
+	 * @param  {object} e Event
+	 * @private
+	 */
+	_key: function ( e )
+	{
+		if ( ! this.s.enable ) {
+			return;
+		}
+
+		if ( e.keyCode === 0 || e.ctrlKey || e.metaKey || e.altKey ) {
+			return;
+		}
+
+		// If not focused, then there is no key action to take
+		var cell = this.s.lastFocus;
+		if ( ! cell ) {
+			return;
+		}
+
+		var that = this;
+		var dt = this.s.dt;
+
+		// If we are not listening for this key, do nothing
+		if ( this.c.keys && $.inArray( e.keyCode, this.c.keys ) === -1 ) {
+			return;
+		}
+
+		switch( e.keyCode ) {
+			case 9: // tab
+				this._shift( e, e.shiftKey ? 'left' : 'right', true );
+				break;
+
+			case 27: // esc
+				if ( this.s.blurable && this.s.enable === true ) {
+					this._blur();
+				}
+				break;
+
+			case 33: // page up (previous page)
+			case 34: // page down (next page)
+				e.preventDefault();
+				var index = dt.cells( {page: 'current'} ).nodes().indexOf( cell.node() );
+
+				dt
+					.one( 'draw', function () {
+						var nodes = dt.cells( {page: 'current'} ).nodes();
+
+						that._focus( dt.cell( index < nodes.length ?
+							nodes[ index ] :
+							nodes[ nodes.length-1 ]
+						) );
+					} )
+					.page( e.keyCode === 33 ? 'previous' : 'next' )
+					.draw( false );
+				break;
+
+			case 35: // end (end of current page)
+			case 36: // home (start of current page)
+				e.preventDefault();
+				var indexes = dt.cells( {page: 'current'} ).indexes();
+
+				this._focus( dt.cell(
+					indexes[ e.keyCode === 35 ? indexes.length-1 : 0 ]
+				) );
+				break;
+
+			case 37: // left arrow
+				this._shift( e, 'left' );
+				break;
+
+			case 38: // up arrow
+				this._shift( e, 'up' );
+				break;
+
+			case 39: // right arrow
+				this._shift( e, 'right' );
+				break;
+
+			case 40: // down arrow
+				this._shift( e, 'down' );
+				break;
+
+			default:
+				// Everything else - pass through only when fully enabled
+				if ( this.s.enable === true ) {
+					this._emitEvent( 'key', [ dt, e.keyCode, this.s.lastFocus, e ] );
+				}
+				break;
+		}
+	},
+
+
+	/**
+	 * Scroll a container to make a cell visible in it. This can be used for
+	 * both DataTables scrolling and native window scrolling.
+	 *
+	 * @param  {jQuery} container Scrolling container
+	 * @param  {jQuery} scroller  Item being scrolled
+	 * @param  {jQuery} cell      Cell in the scroller
+	 * @param  {string} posOff    `position` or `offset` - which to use for the
+	 *   calculation. `offset` for the document, otherwise `position`
+	 * @private
+	 */
+	_scroll: function ( container, scroller, cell, posOff )
+	{
+		var offset = cell[posOff]();
+		var height = cell.outerHeight();
+		var width = cell.outerWidth();
+
+		var scrollTop = scroller.scrollTop();
+		var scrollLeft = scroller.scrollLeft();
+		var containerHeight = container.height();
+		var containerWidth = container.width();
+
+		// Top correction
+		if ( offset.top < scrollTop ) {
+			scroller.scrollTop( offset.top );
+		}
+
+		// Left correction
+		if ( offset.left < scrollLeft ) {
+			scroller.scrollLeft( offset.left );
+		}
+
+		// Bottom correction
+		if ( offset.top + height > scrollTop + containerHeight && height < containerHeight ) {
+			scroller.scrollTop( offset.top + height - containerHeight );
+		}
+
+		// Right correction
+		if ( offset.left + width > scrollLeft + containerWidth && width < containerWidth ) {
+			scroller.scrollLeft( offset.left + width - containerWidth );
+		}
+	},
+
+
+	/**
+	 * Calculate a single offset movement in the table - up, down, left and
+	 * right and then perform the focus if possible
+	 *
+	 * @param  {object}  e           Event object
+	 * @param  {string}  direction   Movement direction
+	 * @param  {boolean} keyBlurable `true` if the key press can result in the
+	 *   table being blurred. This is so arrow keys won't blur the table, but
+	 *   tab will.
+	 * @private
+	 */
+	_shift: function ( e, direction, keyBlurable )
+	{
+		var that         = this;
+		var dt           = this.s.dt;
+		var pageInfo     = dt.page.info();
+		var rows         = pageInfo.recordsDisplay;
+		var currentCell  = this.s.lastFocus;
+		var columns      = this._columns();
+
+		if ( ! currentCell ) {
+			return;
+		}
+
+		var currRow = dt
+			.rows( { filter: 'applied', order: 'applied' } )
+			.indexes()
+			.indexOf( currentCell.index().row );
+
+		// When server-side processing, `rows().indexes()` only gives the rows
+		// that are available at the client-side, so we need to normalise the
+		// row's current position by the display start point
+		if ( pageInfo.serverSide ) {
+			currRow += pageInfo.start;
+		}
+
+		var currCol = dt
+			.columns( columns )
+			.indexes()
+			.indexOf( currentCell.index().column );
+
+		var
+			row = currRow,
+			column = columns[ currCol ]; // row is the display, column is an index
+
+		if ( direction === 'right' ) {
+			if ( currCol >= columns.length - 1 ) {
+				row++;
+				column = columns[0];
+			}
+			else {
+				column = columns[ currCol+1 ];
+			}
+		}
+		else if ( direction === 'left' ) {
+			if ( currCol === 0 ) {
+				row--;
+				column = columns[ columns.length - 1 ];
+			}
+			else {
+				column = columns[ currCol-1 ];
+			}
+		}
+		else if ( direction === 'up' ) {
+			row--;
+		}
+		else if ( direction === 'down' ) {
+			row++;
+		}
+
+		if ( row >= 0 && row < rows && $.inArray( column, columns ) !== -1
+		) {
+			e.preventDefault();
+
+			this._focus( row, column );
+		}
+		else if ( ! keyBlurable || ! this.c.blurable ) {
+			// No new focus, but if the table isn't blurable, then don't loose
+			// focus
+			e.preventDefault();
+		}
+		else {
+			this._blur();
+		}
+	},
+
+
+	/**
+	 * Create a hidden input element that can receive focus on behalf of the
+	 * table
+	 *
+	 * @private
+	 */
+	_tabInput: function ()
+	{
+		var that = this;
+		var dt = this.s.dt;
+		var tabIndex = this.c.tabIndex !== null ?
+			this.c.tabIndex :
+			dt.settings()[0].iTabIndex;
+
+		if ( tabIndex == -1 ) {
+			return;
+		}
+
+		var div = $('<div><input type="text" tabindex="'+tabIndex+'"/></div>')
+			.css( {
+				position: 'absolute',
+				height: 1,
+				width: 0,
+				overflow: 'hidden'
+			} )
+			.insertBefore( dt.table().node() );
+
+		div.children().on( 'focus', function () {
+			that._focus( dt.cell(':eq(0)', '0:visible', {page: 'current'}) );
+		} );
+	}
+} );
+
+
+/**
+ * KeyTable default settings for initialisation
+ *
+ * @namespace
+ * @name KeyTable.defaults
+ * @static
+ */
+KeyTable.defaults = {
+	/**
+	 * Can focus be removed from the table
+	 * @type {Boolean}
+	 */
+	blurable: true,
+
+	/**
+	 * Class to give to the focused cell
+	 * @type {String}
+	 */
+	className: 'focus',
+
+	/**
+	 * Columns that can be focused. This is automatically merged with the
+	 * visible columns as only visible columns can gain focus.
+	 * @type {String}
+	 */
+	columns: '', // all
+
+	/**
+	 * Editor instance to automatically perform Excel like navigation
+	 * @type {Editor}
+	 */
+	editor: null,
+
+	/**
+	 * Select a cell to automatically select on start up. `null` for no
+	 * automatic selection
+	 * @type {cell-selector}
+	 */
+	focus: null,
+
+	/**
+	 * Array of keys to listen for
+	 * @type {null|array}
+	 */
+	keys: null,
+
+	/**
+	 * Tab index for where the table should sit in the document's tab flow
+	 * @type {integer|null}
+	 */
+	tabIndex: null
+};
+
+
+
+KeyTable.version = "2.1.2";
+
+
+$.fn.dataTable.KeyTable = KeyTable;
+$.fn.DataTable.KeyTable = KeyTable;
+
+
+DataTable.Api.register( 'cell.blur()', function () {
+	return this.iterator( 'table', function (ctx) {
+		if ( ctx.keytable ) {
+			ctx.keytable.blur();
+		}
+	} );
+} );
+
+DataTable.Api.register( 'cell().focus()', function () {
+	return this.iterator( 'cell', function (ctx, row, column) {
+		if ( ctx.keytable ) {
+			ctx.keytable.focus( row, column );
+		}
+	} );
+} );
+
+DataTable.Api.register( 'keys.disable()', function () {
+	return this.iterator( 'table', function (ctx) {
+		if ( ctx.keytable ) {
+			ctx.keytable.enable( false );
+		}
+	} );
+} );
+
+DataTable.Api.register( 'keys.enable()', function ( opts ) {
+	return this.iterator( 'table', function (ctx) {
+		if ( ctx.keytable ) {
+			ctx.keytable.enable( opts === undefined ? true : opts );
+		}
+	} );
+} );
+
+// Cell selector
+DataTable.ext.selector.cell.push( function ( settings, opts, cells ) {
+	var focused = opts.focused;
+	var kt = settings.keytable;
+	var out = [];
+
+	if ( ! kt || focused === undefined ) {
+		return cells;
+	}
+
+	for ( var i=0, ien=cells.length ; i<ien ; i++ ) {
+		if ( (focused === true &&  kt.focused( cells[i] ) ) ||
+			 (focused === false && ! kt.focused( cells[i] ) )
+		) {
+			out.push( cells[i] );
+		}
+	}
+
+	return out;
+} );
+
+
+// Attach a listener to the document which listens for DataTables initialisation
+// events so we can automatically initialise
+$(document).on( 'preInit.dt.dtk', function (e, settings, json) {
+	if ( e.namespace !== 'dt' ) {
+		return;
+	}
+
+	var init = settings.oInit.keys;
+	var defaults = DataTable.defaults.keys;
+
+	if ( init || defaults ) {
+		var opts = $.extend( {}, init, defaults );
+
+		if ( init !== false ) {
+			new KeyTable( settings, opts  );
+		}
+	}
+} );
+
+
+return KeyTable;
+}));