/**
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* TableDnD plug-in for JQuery, allows you to drag and drop table rows
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* You can set up various options to control how the system will work
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* Copyright (c) Denis Howlett <denish@isocra.com>
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* License: MIT.
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* See https://github.com/isocra/TableDnD
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*/
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!function ($, window, document, undefined) {
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var startEvent = 'touchstart mousedown',
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moveEvent = 'touchmove mousemove',
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endEvent = 'touchend mouseup';
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$(document).ready(function () {
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function parseStyle(css) {
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var objMap = {},
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parts = css.match(/([^;:]+)/g) || [];
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while (parts.length)
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objMap[parts.shift()] = parts.shift().trim();
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return objMap;
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}
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$('table').each(function () {
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if ($(this).data('table') === 'dnd') {
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$(this).tableDnD({
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onDragStyle: $(this).data('ondragstyle') && parseStyle($(this).data('ondragstyle')) || null,
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onDropStyle: $(this).data('ondropstyle') && parseStyle($(this).data('ondropstyle')) || null,
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onDragClass: $(this).data('ondragclass') === undefined && "tDnD_whileDrag" || $(this).data('ondragclass'),
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onDrop: $(this).data('ondrop') && new Function('table', 'row', $(this).data('ondrop')), // 'return eval("'+$(this).data('ondrop')+'");') || null,
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onDragStart: $(this).data('ondragstart') && new Function('table', 'row' ,$(this).data('ondragstart')), // 'return eval("'+$(this).data('ondragstart')+'");') || null,
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onDragStop: $(this).data('ondragstop') && new Function('table', 'row' ,$(this).data('ondragstop')),
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scrollAmount: $(this).data('scrollamount') || 5,
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sensitivity: $(this).data('sensitivity') || 10,
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hierarchyLevel: $(this).data('hierarchylevel') || 0,
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indentArtifact: $(this).data('indentartifact') || '<div class="indent"> </div>',
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autoWidthAdjust: $(this).data('autowidthadjust') || true,
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autoCleanRelations: $(this).data('autocleanrelations') || true,
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jsonPretifySeparator: $(this).data('jsonpretifyseparator') || '\t',
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serializeRegexp: $(this).data('serializeregexp') && new RegExp($(this).data('serializeregexp')) || /[^\-]*$/,
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serializeParamName: $(this).data('serializeparamname') || false,
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dragHandle: $(this).data('draghandle') || null
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});
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}
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});
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});
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jQuery.tableDnD = {
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/** Keep hold of the current table being dragged */
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currentTable: null,
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/** Keep hold of the current drag object if any */
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dragObject: null,
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/** The current mouse offset */
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mouseOffset: null,
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/** Remember the old value of X and Y so that we don't do too much processing */
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oldX: 0,
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oldY: 0,
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/** Actually build the structure */
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build: function(options) {
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// Set up the defaults if any
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this.each(function() {
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// This is bound to each matching table, set up the defaults and override with user options
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this.tableDnDConfig = $.extend({
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onDragStyle: null,
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onDropStyle: null,
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// Add in the default class for whileDragging
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onDragClass: "tDnD_whileDrag",
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onDrop: null,
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onDragStart: null,
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onDragStop: null,
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scrollAmount: 5,
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/** Sensitivity setting will throttle the trigger rate for movement detection */
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sensitivity: 10,
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/** Hierarchy level to support parent child. 0 switches this functionality off */
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hierarchyLevel: 0,
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/** The html artifact to prepend the first cell with as indentation */
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indentArtifact: '<div class="indent"> </div>',
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/** Automatically adjust width of first cell */
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autoWidthAdjust: true,
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/** Automatic clean-up to ensure relationship integrity */
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autoCleanRelations: true,
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/** Specify a number (4) as number of spaces or any indent string for JSON.stringify */
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jsonPretifySeparator: '\t',
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/** The regular expression to use to trim row IDs */
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serializeRegexp: /[^\-]*$/,
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/** If you want to specify another parameter name instead of the table ID */
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serializeParamName: false,
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/** If you give the name of a class here, then only Cells with this class will be draggable */
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dragHandle: null
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}, options || {});
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// Now make the rows draggable
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$.tableDnD.makeDraggable(this);
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// Prepare hierarchy support
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this.tableDnDConfig.hierarchyLevel
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&& $.tableDnD.makeIndented(this);
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});
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// Don't break the chain
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return this;
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},
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makeIndented: function (table) {
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var config = table.tableDnDConfig,
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rows = table.rows,
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firstCell = $(rows).first().find('td:first')[0],
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indentLevel = 0,
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cellWidth = 0,
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longestCell,
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tableStyle;
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if ($(table).hasClass('indtd'))
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return null;
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tableStyle = $(table).addClass('indtd').attr('style');
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$(table).css({whiteSpace: "nowrap"});
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for (var w = 0; w < rows.length; w++) {
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if (cellWidth < $(rows[w]).find('td:first').text().length) {
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cellWidth = $(rows[w]).find('td:first').text().length;
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longestCell = w;
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}
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}
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$(firstCell).css({width: 'auto'});
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for (w = 0; w < config.hierarchyLevel; w++)
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$(rows[longestCell]).find('td:first').prepend(config.indentArtifact);
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firstCell && $(firstCell).css({width: firstCell.offsetWidth});
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tableStyle && $(table).css(tableStyle);
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for (w = 0; w < config.hierarchyLevel; w++)
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$(rows[longestCell]).find('td:first').children(':first').remove();
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config.hierarchyLevel
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&& $(rows).each(function () {
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indentLevel = $(this).data('level') || 0;
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indentLevel <= config.hierarchyLevel
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&& $(this).data('level', indentLevel)
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|| $(this).data('level', 0);
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for (var i = 0; i < $(this).data('level'); i++)
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$(this).find('td:first').prepend(config.indentArtifact);
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});
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return this;
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},
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/** This function makes all the rows on the table draggable apart from those marked as "NoDrag" */
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makeDraggable: function(table) {
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var config = table.tableDnDConfig;
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config.dragHandle
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// We only need to add the event to the specified cells
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&& $(config.dragHandle, table).each(function() {
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// The cell is bound to "this"
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$(this).bind(startEvent, function(e) {
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$.tableDnD.initialiseDrag($(this).parents('tr')[0], table, this, e, config);
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return false;
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});
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})
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// For backwards compatibility, we add the event to the whole row
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// get all the rows as a wrapped set
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|| $(table.rows).each(function() {
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// Iterate through each row, the row is bound to "this"
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if (! $(this).hasClass("nodrag")) {
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$(this).bind(startEvent, function(e) {
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if (e.target.tagName === "TD" && event.target.className !== "nodrag") {
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$.tableDnD.initialiseDrag(this, table, this, e, config);
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return false;
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}
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}).css("cursor", "move"); // Store the tableDnD object
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} else {
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$(this).css("cursor", ""); // Remove the cursor if we don't have the nodrag class
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}
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});
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},
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currentOrder: function() {
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var rows = this.currentTable.rows;
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return $.map(rows, function (val) {
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return ($(val).data('level') + val.id).replace(/\s/g, '');
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}).join('');
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},
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initialiseDrag: function(dragObject, table, target, e, config) {
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this.dragObject = dragObject;
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this.currentTable = table;
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this.mouseOffset = this.getMouseOffset(target, e);
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this.originalOrder = this.currentOrder();
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// Now we need to capture the mouse up and mouse move event
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// We can use bind so that we don't interfere with other event handlers
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$(document)
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.bind(moveEvent, this.mousemove)
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.bind(endEvent, this.mouseup);
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// Call the onDragStart method if there is one
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config.onDragStart
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&& config.onDragStart(table, target);
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},
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updateTables: function() {
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this.each(function() {
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// this is now bound to each matching table
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if (this.tableDnDConfig)
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$.tableDnD.makeDraggable(this);
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});
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},
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/** Get the mouse coordinates from the event (allowing for browser differences) */
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mouseCoords: function(e) {
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if (e.originalEvent.changedTouches)
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return {
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x: e.originalEvent.changedTouches[0].clientX,
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y: e.originalEvent.changedTouches[0].clientY
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};
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if(e.pageX || e.pageY)
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return {
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x: e.pageX,
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y: e.pageY
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};
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return {
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x: e.clientX + document.body.scrollLeft - document.body.clientLeft,
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y: e.clientY + document.body.scrollTop - document.body.clientTop
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};
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},
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/** Given a target element and a mouse eent, get the mouse offset from that element.
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To do this we need the element's position and the mouse position */
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getMouseOffset: function(target, e) {
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var mousePos,
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docPos;
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e = e || window.event;
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docPos = this.getPosition(target);
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mousePos = this.mouseCoords(e);
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return {
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x: mousePos.x - docPos.x,
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y: mousePos.y - docPos.y
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};
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},
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/** Get the position of an element by going up the DOM tree and adding up all the offsets */
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getPosition: function(element) {
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var left = 0,
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top = 0;
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// Safari fix -- thanks to Luis Chato for this!
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// Safari 2 doesn't correctly grab the offsetTop of a table row
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// this is detailed here:
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// http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari/
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// the solution is likewise noted there, grab the offset of a table cell in the row - the firstChild.
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// note that firefox will return a text node as a first child, so designing a more thorough
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// solution may need to take that into account, for now this seems to work in firefox, safari, ie
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if (element.offsetHeight === 0)
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element = element.firstChild; // a table cell
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while (element.offsetParent) {
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left += element.offsetLeft;
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top += element.offsetTop;
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element = element.offsetParent;
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}
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left += element.offsetLeft;
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top += element.offsetTop;
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return {
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x: left,
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y: top
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};
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},
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autoScroll: function (mousePos) {
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var config = this.currentTable.tableDnDConfig,
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yOffset = window.pageYOffset,
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windowHeight = window.innerHeight
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? window.innerHeight
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: document.documentElement.clientHeight
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? document.documentElement.clientHeight
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: document.body.clientHeight;
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// Windows version
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// yOffset=document.body.scrollTop;
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if (document.all)
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if (typeof document.compatMode !== 'undefined'
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&& document.compatMode !== 'BackCompat')
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yOffset = document.documentElement.scrollTop;
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else if (typeof document.body !== 'undefined')
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yOffset = document.body.scrollTop;
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mousePos.y - yOffset < config.scrollAmount
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&& window.scrollBy(0, - config.scrollAmount)
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|| windowHeight - (mousePos.y - yOffset) < config.scrollAmount
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&& window.scrollBy(0, config.scrollAmount);
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},
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moveVerticle: function (moving, currentRow) {
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if (0 !== moving.vertical
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// If we're over a row then move the dragged row to there so that the user sees the
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// effect dynamically
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&& currentRow
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&& this.dragObject !== currentRow
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&& this.dragObject.parentNode === currentRow.parentNode)
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0 > moving.vertical
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&& this.dragObject.parentNode.insertBefore(this.dragObject, currentRow.nextSibling)
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|| 0 < moving.vertical
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&& this.dragObject.parentNode.insertBefore(this.dragObject, currentRow);
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},
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moveHorizontal: function (moving, currentRow) {
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var config = this.currentTable.tableDnDConfig,
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currentLevel;
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if (!config.hierarchyLevel
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|| 0 === moving.horizontal
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// We only care if moving left or right on the current row
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|| !currentRow
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|| this.dragObject !== currentRow)
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return null;
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currentLevel = $(currentRow).data('level');
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0 < moving.horizontal
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&& currentLevel > 0
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&& $(currentRow).find('td:first').children(':first').remove()
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&& $(currentRow).data('level', --currentLevel);
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0 > moving.horizontal
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&& currentLevel < config.hierarchyLevel
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&& $(currentRow).prev().data('level') >= currentLevel
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&& $(currentRow).children(':first').prepend(config.indentArtifact)
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&& $(currentRow).data('level', ++currentLevel);
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},
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mousemove: function(e) {
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var dragObj = $($.tableDnD.dragObject),
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config = $.tableDnD.currentTable.tableDnDConfig,
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currentRow,
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mousePos,
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moving,
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x,
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y;
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e && e.preventDefault();
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if (!$.tableDnD.dragObject)
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return false;
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// prevent touch device screen scrolling
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e.type === 'touchmove'
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&& event.preventDefault(); // TODO verify this is event and not really e
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// update the style to show we're dragging
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config.onDragClass
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&& dragObj.addClass(config.onDragClass)
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|| dragObj.css(config.onDragStyle);
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mousePos = $.tableDnD.mouseCoords(e);
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x = mousePos.x - $.tableDnD.mouseOffset.x;
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y = mousePos.y - $.tableDnD.mouseOffset.y;
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// auto scroll the window
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$.tableDnD.autoScroll(mousePos);
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currentRow = $.tableDnD.findDropTargetRow(dragObj, y);
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moving = $.tableDnD.findDragDirection(x, y);
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$.tableDnD.moveVerticle(moving, currentRow);
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$.tableDnD.moveHorizontal(moving, currentRow);
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return false;
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},
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findDragDirection: function (x,y) {
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var sensitivity = this.currentTable.tableDnDConfig.sensitivity,
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oldX = this.oldX,
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oldY = this.oldY,
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xMin = oldX - sensitivity,
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xMax = oldX + sensitivity,
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yMin = oldY - sensitivity,
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yMax = oldY + sensitivity,
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moving = {
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horizontal: x >= xMin && x <= xMax ? 0 : x > oldX ? -1 : 1,
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vertical : y >= yMin && y <= yMax ? 0 : y > oldY ? -1 : 1
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};
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// update the old value
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if (moving.horizontal !== 0)
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this.oldX = x;
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if (moving.vertical !== 0)
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this.oldY = y;
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return moving;
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},
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/** We're only worried about the y position really, because we can only move rows up and down */
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findDropTargetRow: function(draggedRow, y) {
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var rowHeight = 0,
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rows = this.currentTable.rows,
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config = this.currentTable.tableDnDConfig,
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rowY = 0,
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row = null;
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for (var i = 0; i < rows.length; i++) {
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row = rows[i];
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rowY = this.getPosition(row).y;
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rowHeight = parseInt(row.offsetHeight) / 2;
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if (row.offsetHeight === 0) {
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rowY = this.getPosition(row.firstChild).y;
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rowHeight = parseInt(row.firstChild.offsetHeight) / 2;
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}
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// Because we always have to insert before, we need to offset the height a bit
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if (y > (rowY - rowHeight) && y < (rowY + rowHeight))
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// that's the row we're over
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// If it's the same as the current row, ignore it
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if (draggedRow.is(row)
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|| (config.onAllowDrop
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&& !config.onAllowDrop(draggedRow, row))
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// If a row has nodrop class, then don't allow dropping (inspired by John Tarr and Famic)
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|| $(row).hasClass("nodrop"))
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return null;
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else
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return row;
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}
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return null;
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},
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processMouseup: function() {
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if (!this.currentTable || !this.dragObject)
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return null;
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var config = this.currentTable.tableDnDConfig,
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droppedRow = this.dragObject,
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parentLevel = 0,
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myLevel = 0;
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// Unbind the event handlers
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$(document)
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.unbind(moveEvent, this.mousemove)
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.unbind(endEvent, this.mouseup);
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config.hierarchyLevel
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&& config.autoCleanRelations
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&& $(this.currentTable.rows).first().find('td:first').children().each(function () {
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myLevel = $(this).parents('tr:first').data('level');
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myLevel
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&& $(this).parents('tr:first').data('level', --myLevel)
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&& $(this).remove();
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})
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&& config.hierarchyLevel > 1
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&& $(this.currentTable.rows).each(function () {
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myLevel = $(this).data('level');
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if (myLevel > 1) {
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parentLevel = $(this).prev().data('level');
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while (myLevel > parentLevel + 1) {
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$(this).find('td:first').children(':first').remove();
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$(this).data('level', --myLevel);
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}
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}
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});
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// If we have a dragObject, then we need to release it,
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// The row will already have been moved to the right place so we just reset stuff
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config.onDragClass
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&& $(droppedRow).removeClass(config.onDragClass)
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|| $(droppedRow).css(config.onDropStyle);
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this.dragObject = null;
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// Call the onDrop method if there is one
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config.onDrop
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&& this.originalOrder !== this.currentOrder()
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&& $(droppedRow).hide().fadeIn('fast')
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&& config.onDrop(this.currentTable, droppedRow);
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// Call the onDragStop method if there is one
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config.onDragStop
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&& config.onDragStop(this.currentTable, droppedRow);
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this.currentTable = null; // let go of the table too
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},
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mouseup: function(e) {
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e && e.preventDefault();
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$.tableDnD.processMouseup();
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return false;
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},
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jsonize: function(pretify) {
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var table = this.currentTable;
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if (pretify)
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return JSON.stringify(
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this.tableData(table),
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null,
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table.tableDnDConfig.jsonPretifySeparator
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);
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return JSON.stringify(this.tableData(table));
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},
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serialize: function() {
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return $.param(this.tableData(this.currentTable));
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},
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serializeTable: function(table) {
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var result = "";
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var paramName = table.tableDnDConfig.serializeParamName || table.id;
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var rows = table.rows;
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for (var i=0; i<rows.length; i++) {
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if (result.length > 0) result += "&";
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var rowId = rows[i].id;
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if (rowId && table.tableDnDConfig && table.tableDnDConfig.serializeRegexp) {
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rowId = rowId.match(table.tableDnDConfig.serializeRegexp)[0];
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result += paramName + '[]=' + rowId;
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}
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}
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return result;
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},
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serializeTables: function() {
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var result = [];
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$('table').each(function() {
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this.id && result.push($.param($.tableDnD.tableData(this)));
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});
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return result.join('&');
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},
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tableData: function (table) {
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var config = table.tableDnDConfig,
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previousIDs = [],
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currentLevel = 0,
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indentLevel = 0,
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rowID = null,
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data = {},
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getSerializeRegexp,
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paramName,
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currentID,
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rows;
|
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if (!table)
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table = this.currentTable;
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if (!table || !table.rows || !table.rows.length)
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return {error: { code: 500, message: "Not a valid table."}};
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if (!table.id && !config.serializeParamName)
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return {error: { code: 500, message: "No serializable unique id provided."}};
|
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rows = config.autoCleanRelations
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&& table.rows
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|| $.makeArray(table.rows);
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paramName = config.serializeParamName || table.id;
|
currentID = paramName;
|
|
getSerializeRegexp = function (rowId) {
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if (rowId && config && config.serializeRegexp)
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return rowId.match(config.serializeRegexp)[0];
|
return rowId;
|
};
|
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data[currentID] = [];
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!config.autoCleanRelations
|
&& $(rows[0]).data('level')
|
&& rows.unshift({id: 'undefined'});
|
|
|
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for (var i=0; i < rows.length; i++) {
|
if (config.hierarchyLevel) {
|
indentLevel = $(rows[i]).data('level') || 0;
|
if (indentLevel === 0) {
|
currentID = paramName;
|
previousIDs = [];
|
}
|
else if (indentLevel > currentLevel) {
|
previousIDs.push([currentID, currentLevel]);
|
currentID = getSerializeRegexp(rows[i-1].id);
|
}
|
else if (indentLevel < currentLevel) {
|
for (var h = 0; h < previousIDs.length; h++) {
|
if (previousIDs[h][1] === indentLevel)
|
currentID = previousIDs[h][0];
|
if (previousIDs[h][1] >= currentLevel)
|
previousIDs[h][1] = 0;
|
}
|
}
|
currentLevel = indentLevel;
|
|
if (!$.isArray(data[currentID]))
|
data[currentID] = [];
|
rowID = getSerializeRegexp(rows[i].id);
|
rowID && data[currentID].push(rowID);
|
}
|
else {
|
rowID = getSerializeRegexp(rows[i].id);
|
rowID && data[currentID].push(rowID);
|
}
|
}
|
return data;
|
}
|
};
|
|
jQuery.fn.extend(
|
{
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tableDnD : $.tableDnD.build,
|
tableDnDUpdate : $.tableDnD.updateTables,
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tableDnDSerialize : $.proxy($.tableDnD.serialize, $.tableDnD),
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tableDnDSerializeAll : $.tableDnD.serializeTables,
|
tableDnDData : $.proxy($.tableDnD.tableData, $.tableDnD)
|
}
|
);
|
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}(jQuery, window, window.document);
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