(function ($) { /** * Drag and drop table rows with field manipulation. * * Using the drupal_add_tabledrag() function, any table with weights or parent * relationships may be made into draggable tables. Columns containing a field * may optionally be hidden, providing a better user experience. * * Created tableDrag instances may be modified with custom behaviors by * overriding the .onDrag, .onDrop, .row.onSwap, and .row.onIndent methods. * See blocks.js for an example of adding additional functionality to tableDrag. */ Drupal.behaviors.tableDrag = { attach: function (context, settings) { for (var base in settings.tableDrag) { $('#' + base, context).once('tabledrag', function () { // Create the new tableDrag instance. Save in the Drupal variable // to allow other scripts access to the object. Drupal.tableDrag[base] = new Drupal.tableDrag(this, settings.tableDrag[base]); }); } } }; /** * Constructor for the tableDrag object. Provides table and field manipulation. * * @param table * DOM object for the table to be made draggable. * @param tableSettings * Settings for the table added via drupal_add_dragtable(). */ Drupal.tableDrag = function (table, tableSettings) { var self = this; // Required object variables. this.table = table; this.tableSettings = tableSettings; this.dragObject = null; // Used to hold information about a current drag operation. this.rowObject = null; // Provides operations for row manipulation. this.oldRowElement = null; // Remember the previous element. this.oldY = 0; // Used to determine up or down direction from last mouse move. this.changed = false; // Whether anything in the entire table has changed. this.maxDepth = 0; // Maximum amount of allowed parenting. this.rtl = $(this.table).css('direction') == 'rtl' ? -1 : 1; // Direction of the table. // Configure the scroll settings. this.scrollSettings = { amount: 4, interval: 50, trigger: 70 }; this.scrollInterval = null; this.scrollY = 0; this.windowHeight = 0; // Check this table's settings to see if there are parent relationships in // this table. For efficiency, large sections of code can be skipped if we // don't need to track horizontal movement and indentations. this.indentEnabled = false; for (var group in tableSettings) { for (var n in tableSettings[group]) { if (tableSettings[group][n].relationship == 'parent') { this.indentEnabled = true; } if (tableSettings[group][n].limit > 0) { this.maxDepth = tableSettings[group][n].limit; } } } if (this.indentEnabled) { this.indentCount = 1; // Total width of indents, set in makeDraggable. // Find the width of indentations to measure mouse movements against. // Because the table doesn't need to start with any indentations, we // manually append 2 indentations in the first draggable row, measure // the offset, then remove. var indent = Drupal.theme('tableDragIndentation'); var testRow = $('').addClass('draggable').appendTo(table); var testCell = $('').appendTo(testRow).prepend(indent).prepend(indent); this.indentAmount = $('.indentation', testCell).get(1).offsetLeft - $('.indentation', testCell).get(0).offsetLeft; testRow.remove(); } // Make each applicable row draggable. // Match immediate children of the parent element to allow nesting. $('> tr.draggable, > tbody > tr.draggable', table).each(function () { self.makeDraggable(this); }); // Add a link before the table for users to show or hide weight columns. $(table).before($('') .attr('title', Drupal.t('Re-order rows by numerical weight instead of dragging.')) .click(function () { if ($.cookie('Drupal.tableDrag.showWeight') == 1) { self.hideColumns(); } else { self.showColumns(); } return false; }) .wrap('
') .parent() ); // Initialize the specified columns (for example, weight or parent columns) // to show or hide according to user preference. This aids accessibility // so that, e.g., screen reader users can choose to enter weight values and // manipulate form elements directly, rather than using drag-and-drop.. self.initColumns(); // Add mouse bindings to the document. The self variable is passed along // as event handlers do not have direct access to the tableDrag object. $(document).bind('mousemove pointermove', function (event) { return self.dragRow(event, self); }); $(document).bind('mouseup pointerup', function (event) { return self.dropRow(event, self); }); $(document).bind('touchmove', function (event) { return self.dragRow(event.originalEvent.touches[0], self); }); $(document).bind('touchend', function (event) { return self.dropRow(event.originalEvent.touches[0], self); }); }; /** * Initialize columns containing form elements to be hidden by default, * according to the settings for this tableDrag instance. * * Identify and mark each cell with a CSS class so we can easily toggle * show/hide it. Finally, hide columns if user does not have a * 'Drupal.tableDrag.showWeight' cookie. */ Drupal.tableDrag.prototype.initColumns = function () { for (var group in this.tableSettings) { // Find the first field in this group. for (var d in this.tableSettings[group]) { var field = $('.' + this.tableSettings[group][d].target + ':first', this.table); if (field.length && this.tableSettings[group][d].hidden) { var hidden = this.tableSettings[group][d].hidden; var cell = field.closest('td'); break; } } // Mark the column containing this field so it can be hidden. if (hidden && cell[0]) { // Add 1 to our indexes. The nth-child selector is 1 based, not 0 based. // Match immediate children of the parent element to allow nesting. var columnIndex = $('> td', cell.parent()).index(cell.get(0)) + 1; $('> thead > tr, > tbody > tr, > tr', this.table).each(function () { // Get the columnIndex and adjust for any colspans in this row. var index = columnIndex; var cells = $(this).children(); cells.each(function (n) { if (n < index && this.colSpan && this.colSpan > 1) { index -= this.colSpan - 1; } }); if (index > 0) { cell = cells.filter(':nth-child(' + index + ')'); if (cell[0].colSpan && cell[0].colSpan > 1) { // If this cell has a colspan, mark it so we can reduce the colspan. cell.addClass('tabledrag-has-colspan'); } else { // Mark this cell so we can hide it. cell.addClass('tabledrag-hide'); } } }); } } // Now hide cells and reduce colspans unless cookie indicates previous choice. // Set a cookie if it is not already present. if ($.cookie('Drupal.tableDrag.showWeight') === null) { $.cookie('Drupal.tableDrag.showWeight', 0, { path: Drupal.settings.basePath, // The cookie expires in one year. expires: 365 }); this.hideColumns(); } // Check cookie value and show/hide weight columns accordingly. else { if ($.cookie('Drupal.tableDrag.showWeight') == 1) { this.showColumns(); } else { this.hideColumns(); } } }; /** * Hide the columns containing weight/parent form elements. * Undo showColumns(). */ Drupal.tableDrag.prototype.hideColumns = function () { // Hide weight/parent cells and headers. $('.tabledrag-hide', 'table.tabledrag-processed').css('display', 'none'); // Show TableDrag handles. $('.tabledrag-handle', 'table.tabledrag-processed').css('display', ''); // Reduce the colspan of any effected multi-span columns. $('.tabledrag-has-colspan', 'table.tabledrag-processed').each(function () { this.colSpan = this.colSpan - 1; }); // Change link text. $('.tabledrag-toggle-weight').text(Drupal.t('Show row weights')); // Change cookie. $.cookie('Drupal.tableDrag.showWeight', 0, { path: Drupal.settings.basePath, // The cookie expires in one year. expires: 365 }); // Trigger an event to allow other scripts to react to this display change. $('table.tabledrag-processed').trigger('columnschange', 'hide'); }; /** * Show the columns containing weight/parent form elements * Undo hideColumns(). */ Drupal.tableDrag.prototype.showColumns = function () { // Show weight/parent cells and headers. $('.tabledrag-hide', 'table.tabledrag-processed').css('display', ''); // Hide TableDrag handles. $('.tabledrag-handle', 'table.tabledrag-processed').css('display', 'none'); // Increase the colspan for any columns where it was previously reduced. $('.tabledrag-has-colspan', 'table.tabledrag-processed').each(function () { this.colSpan = this.colSpan + 1; }); // Change link text. $('.tabledrag-toggle-weight').text(Drupal.t('Hide row weights')); // Change cookie. $.cookie('Drupal.tableDrag.showWeight', 1, { path: Drupal.settings.basePath, // The cookie expires in one year. expires: 365 }); // Trigger an event to allow other scripts to react to this display change. $('table.tabledrag-processed').trigger('columnschange', 'show'); }; /** * Find the target used within a particular row and group. */ Drupal.tableDrag.prototype.rowSettings = function (group, row) { var field = $('.' + group, row); for (var delta in this.tableSettings[group]) { var targetClass = this.tableSettings[group][delta].target; if (field.is('.' + targetClass)) { // Return a copy of the row settings. var rowSettings = {}; for (var n in this.tableSettings[group][delta]) { rowSettings[n] = this.tableSettings[group][delta][n]; } return rowSettings; } } }; /** * Take an item and add event handlers to make it become draggable. */ Drupal.tableDrag.prototype.makeDraggable = function (item) { var self = this; // Create the handle. var handle = $('
 
').attr('title', Drupal.t('Drag to re-order')); // Insert the handle after indentations (if any). if ($('td:first .indentation:last', item).length) { $('td:first .indentation:last', item).after(handle); // Update the total width of indentation in this entire table. self.indentCount = Math.max($('.indentation', item).length, self.indentCount); } else { $('td:first', item).prepend(handle); } // Add hover action for the handle. handle.hover(function () { self.dragObject == null ? $(this).addClass('tabledrag-handle-hover') : null; }, function () { self.dragObject == null ? $(this).removeClass('tabledrag-handle-hover') : null; }); // Add the mousedown action for the handle. handle.bind('mousedown touchstart pointerdown', function (event) { if (event.originalEvent.type == "touchstart") { event = event.originalEvent.touches[0]; } // Create a new dragObject recording the event information. self.dragObject = {}; self.dragObject.initMouseOffset = self.getMouseOffset(item, event); self.dragObject.initMouseCoords = self.mouseCoords(event); if (self.indentEnabled) { self.dragObject.indentMousePos = self.dragObject.initMouseCoords; } // If there's a lingering row object from the keyboard, remove its focus. if (self.rowObject) { $('a.tabledrag-handle', self.rowObject.element).blur(); } // Create a new rowObject for manipulation of this row. self.rowObject = new self.row(item, 'mouse', self.indentEnabled, self.maxDepth, true); // Save the position of the table. self.table.topY = $(self.table).offset().top; self.table.bottomY = self.table.topY + self.table.offsetHeight; // Add classes to the handle and row. $(this).addClass('tabledrag-handle-hover'); $(item).addClass('drag'); // Set the document to use the move cursor during drag. $('body').addClass('drag'); if (self.oldRowElement) { $(self.oldRowElement).removeClass('drag-previous'); } // Hack for IE6 that flickers uncontrollably if select lists are moved. if (navigator.userAgent.indexOf('MSIE 6.') != -1) { $('select', this.table).css('display', 'none'); } // Hack for Konqueror, prevent the blur handler from firing. // Konqueror always gives links focus, even after returning false on mousedown. self.safeBlur = false; // Call optional placeholder function. self.onDrag(); return false; }); // Prevent the anchor tag from jumping us to the top of the page. handle.click(function () { return false; }); // Similar to the hover event, add a class when the handle is focused. handle.focus(function () { $(this).addClass('tabledrag-handle-hover'); self.safeBlur = true; }); // Remove the handle class on blur and fire the same function as a mouseup. handle.blur(function (event) { $(this).removeClass('tabledrag-handle-hover'); if (self.rowObject && self.safeBlur) { self.dropRow(event, self); } }); // Add arrow-key support to the handle. handle.keydown(function (event) { // If a rowObject doesn't yet exist and this isn't the tab key. if (event.keyCode != 9 && !self.rowObject) { self.rowObject = new self.row(item, 'keyboard', self.indentEnabled, self.maxDepth, true); } var keyChange = false; switch (event.keyCode) { case 37: // Left arrow. case 63234: // Safari left arrow. keyChange = true; self.rowObject.indent(-1 * self.rtl); break; case 38: // Up arrow. case 63232: // Safari up arrow. var previousRow = $(self.rowObject.element).prev('tr').get(0); while (previousRow && $(previousRow).is(':hidden')) { previousRow = $(previousRow).prev('tr').get(0); } if (previousRow) { self.safeBlur = false; // Do not allow the onBlur cleanup. self.rowObject.direction = 'up'; keyChange = true; if ($(item).is('.tabledrag-root')) { // Swap with the previous top-level row. var groupHeight = 0; while (previousRow && $('.indentation', previousRow).length) { previousRow = $(previousRow).prev('tr').get(0); groupHeight += $(previousRow).is(':hidden') ? 0 : previousRow.offsetHeight; } if (previousRow) { self.rowObject.swap('before', previousRow); // No need to check for indentation, 0 is the only valid one. window.scrollBy(0, -groupHeight); } } else if (self.table.tBodies[0].rows[0] != previousRow || $(previousRow).is('.draggable')) { // Swap with the previous row (unless previous row is the first one // and undraggable). self.rowObject.swap('before', previousRow); self.rowObject.interval = null; self.rowObject.indent(0); window.scrollBy(0, -parseInt(item.offsetHeight, 10)); } handle.get(0).focus(); // Regain focus after the DOM manipulation. } break; case 39: // Right arrow. case 63235: // Safari right arrow. keyChange = true; self.rowObject.indent(1 * self.rtl); break; case 40: // Down arrow. case 63233: // Safari down arrow. var nextRow = $(self.rowObject.group).filter(':last').next('tr').get(0); while (nextRow && $(nextRow).is(':hidden')) { nextRow = $(nextRow).next('tr').get(0); } if (nextRow) { self.safeBlur = false; // Do not allow the onBlur cleanup. self.rowObject.direction = 'down'; keyChange = true; if ($(item).is('.tabledrag-root')) { // Swap with the next group (necessarily a top-level one). var groupHeight = 0; var nextGroup = new self.row(nextRow, 'keyboard', self.indentEnabled, self.maxDepth, false); if (nextGroup) { $(nextGroup.group).each(function () { groupHeight += $(this).is(':hidden') ? 0 : this.offsetHeight; }); var nextGroupRow = $(nextGroup.group).filter(':last').get(0); self.rowObject.swap('after', nextGroupRow); // No need to check for indentation, 0 is the only valid one. window.scrollBy(0, parseInt(groupHeight, 10)); } } else { // Swap with the next row. self.rowObject.swap('after', nextRow); self.rowObject.interval = null; self.rowObject.indent(0); window.scrollBy(0, parseInt(item.offsetHeight, 10)); } handle.get(0).focus(); // Regain focus after the DOM manipulation. } break; } if (self.rowObject && self.rowObject.changed == true) { $(item).addClass('drag'); if (self.oldRowElement) { $(self.oldRowElement).removeClass('drag-previous'); } self.oldRowElement = item; self.restripeTable(); self.onDrag(); } // Returning false if we have an arrow key to prevent scrolling. if (keyChange) { return false; } }); // Compatibility addition, return false on keypress to prevent unwanted scrolling. // IE and Safari will suppress scrolling on keydown, but all other browsers // need to return false on keypress. http://www.quirksmode.org/js/keys.html handle.keypress(function (event) { switch (event.keyCode) { case 37: // Left arrow. case 38: // Up arrow. case 39: // Right arrow. case 40: // Down arrow. return false; } }); }; /** * Mousemove event handler, bound to document. */ Drupal.tableDrag.prototype.dragRow = function (event, self) { if (self.dragObject) { self.currentMouseCoords = self.mouseCoords(event); var y = self.currentMouseCoords.y - self.dragObject.initMouseOffset.y; var x = self.currentMouseCoords.x - self.dragObject.initMouseOffset.x; // Check for row swapping and vertical scrolling. if (y != self.oldY) { self.rowObject.direction = y > self.oldY ? 'down' : 'up'; self.oldY = y; // Update the old value. // Check if the window should be scrolled (and how fast). var scrollAmount = self.checkScroll(self.currentMouseCoords.y); // Stop any current scrolling. clearInterval(self.scrollInterval); // Continue scrolling if the mouse has moved in the scroll direction. if (scrollAmount > 0 && self.rowObject.direction == 'down' || scrollAmount < 0 && self.rowObject.direction == 'up') { self.setScroll(scrollAmount); } // If we have a valid target, perform the swap and restripe the table. var currentRow = self.findDropTargetRow(x, y); if (currentRow) { if (self.rowObject.direction == 'down') { self.rowObject.swap('after', currentRow, self); } else { self.rowObject.swap('before', currentRow, self); } self.restripeTable(); } } // Similar to row swapping, handle indentations. if (self.indentEnabled) { var xDiff = self.currentMouseCoords.x - self.dragObject.indentMousePos.x; // Set the number of indentations the mouse has been moved left or right. var indentDiff = Math.round(xDiff / self.indentAmount); // Indent the row with our estimated diff, which may be further // restricted according to the rows around this row. var indentChange = self.rowObject.indent(indentDiff); // Update table and mouse indentations. self.dragObject.indentMousePos.x += self.indentAmount * indentChange * self.rtl; self.indentCount = Math.max(self.indentCount, self.rowObject.indents); } return false; } }; /** * Mouseup event handler, bound to document. * Blur event handler, bound to drag handle for keyboard support. */ Drupal.tableDrag.prototype.dropRow = function (event, self) { // Drop row functionality shared between mouseup and blur events. if (self.rowObject != null) { var droppedRow = self.rowObject.element; // The row is already in the right place so we just release it. if (self.rowObject.changed == true) { // Update the fields in the dropped row. self.updateFields(droppedRow); // If a setting exists for affecting the entire group, update all the // fields in the entire dragged group. for (var group in self.tableSettings) { var rowSettings = self.rowSettings(group, droppedRow); if (rowSettings.relationship == 'group') { for (var n in self.rowObject.children) { self.updateField(self.rowObject.children[n], group); } } } self.rowObject.markChanged(); if (self.changed == false) { $(Drupal.theme('tableDragChangedWarning')).insertBefore(self.table).hide().fadeIn('slow'); self.changed = true; } } if (self.indentEnabled) { self.rowObject.removeIndentClasses(); } if (self.oldRowElement) { $(self.oldRowElement).removeClass('drag-previous'); } $(droppedRow).removeClass('drag').addClass('drag-previous'); self.oldRowElement = droppedRow; self.onDrop(); self.rowObject = null; } // Functionality specific only to mouseup event. if (self.dragObject != null) { $('.tabledrag-handle', droppedRow).removeClass('tabledrag-handle-hover'); self.dragObject = null; $('body').removeClass('drag'); clearInterval(self.scrollInterval); // Hack for IE6 that flickers uncontrollably if select lists are moved. if (navigator.userAgent.indexOf('MSIE 6.') != -1) { $('select', this.table).css('display', 'block'); } } }; /** * Get the mouse coordinates from the event (allowing for browser differences). */ Drupal.tableDrag.prototype.mouseCoords = function (event) { if (event.pageX || event.pageY) { return { x: event.pageX, y: event.pageY }; } return { x: event.clientX + document.body.scrollLeft - document.body.clientLeft, y: event.clientY + document.body.scrollTop - document.body.clientTop }; }; /** * Given a target element and a mouse event, get the mouse offset from that * element. To do this we need the element's position and the mouse position. */ Drupal.tableDrag.prototype.getMouseOffset = function (target, event) { var docPos = $(target).offset(); var mousePos = this.mouseCoords(event); return { x: mousePos.x - docPos.left, y: mousePos.y - docPos.top }; }; /** * Find the row the mouse is currently over. This row is then taken and swapped * with the one being dragged. * * @param x * The x coordinate of the mouse on the page (not the screen). * @param y * The y coordinate of the mouse on the page (not the screen). */ Drupal.tableDrag.prototype.findDropTargetRow = function (x, y) { var rows = $(this.table.tBodies[0].rows).not(':hidden'); for (var n = 0; n < rows.length; n++) { var row = rows[n]; var indentDiff = 0; var rowY = $(row).offset().top; // Because Safari does not report offsetHeight on table rows, but does on // table cells, grab the firstChild of the row and use that instead. // http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari. if (row.offsetHeight == 0) { var rowHeight = parseInt(row.firstChild.offsetHeight, 10) / 2; } // Other browsers. else { var rowHeight = parseInt(row.offsetHeight, 10) / 2; } // Because we always insert before, we need to offset the height a bit. if ((y > (rowY - rowHeight)) && (y < (rowY + rowHeight))) { if (this.indentEnabled) { // Check that this row is not a child of the row being dragged. for (var n in this.rowObject.group) { if (this.rowObject.group[n] == row) { return null; } } } else { // Do not allow a row to be swapped with itself. if (row == this.rowObject.element) { return null; } } // Check that swapping with this row is allowed. if (!this.rowObject.isValidSwap(row)) { return null; } // We may have found the row the mouse just passed over, but it doesn't // take into account hidden rows. Skip backwards until we find a draggable // row. while ($(row).is(':hidden') && $(row).prev('tr').is(':hidden')) { row = $(row).prev('tr').get(0); } return row; } } return null; }; /** * After the row is dropped, update the table fields according to the settings * set for this table. * * @param changedRow * DOM object for the row that was just dropped. */ Drupal.tableDrag.prototype.updateFields = function (changedRow) { for (var group in this.tableSettings) { // Each group may have a different setting for relationship, so we find // the source rows for each separately. this.updateField(changedRow, group); } }; /** * After the row is dropped, update a single table field according to specific * settings. * * @param changedRow * DOM object for the row that was just dropped. * @param group * The settings group on which field updates will occur. */ Drupal.tableDrag.prototype.updateField = function (changedRow, group) { var rowSettings = this.rowSettings(group, changedRow); // Set the row as its own target. if (rowSettings.relationship == 'self' || rowSettings.relationship == 'group') { var sourceRow = changedRow; } // Siblings are easy, check previous and next rows. else if (rowSettings.relationship == 'sibling') { var previousRow = $(changedRow).prev('tr').get(0); var nextRow = $(changedRow).next('tr').get(0); var sourceRow = changedRow; if ($(previousRow).is('.draggable') && $('.' + group, previousRow).length) { if (this.indentEnabled) { if ($('.indentations', previousRow).length == $('.indentations', changedRow)) { sourceRow = previousRow; } } else { sourceRow = previousRow; } } else if ($(nextRow).is('.draggable') && $('.' + group, nextRow).length) { if (this.indentEnabled) { if ($('.indentations', nextRow).length == $('.indentations', changedRow)) { sourceRow = nextRow; } } else { sourceRow = nextRow; } } } // Parents, look up the tree until we find a field not in this group. // Go up as many parents as indentations in the changed row. else if (rowSettings.relationship == 'parent') { var previousRow = $(changedRow).prev('tr'); while (previousRow.length && $('.indentation', previousRow).length >= this.rowObject.indents) { previousRow = previousRow.prev('tr'); } // If we found a row. if (previousRow.length) { sourceRow = previousRow[0]; } // Otherwise we went all the way to the left of the table without finding // a parent, meaning this item has been placed at the root level. else { // Use the first row in the table as source, because it's guaranteed to // be at the root level. Find the first item, then compare this row // against it as a sibling. sourceRow = $(this.table).find('tr.draggable:first').get(0); if (sourceRow == this.rowObject.element) { sourceRow = $(this.rowObject.group[this.rowObject.group.length - 1]).next('tr.draggable').get(0); } var useSibling = true; } } // Because we may have moved the row from one category to another, // take a look at our sibling and borrow its sources and targets. this.copyDragClasses(sourceRow, changedRow, group); rowSettings = this.rowSettings(group, changedRow); // In the case that we're looking for a parent, but the row is at the top // of the tree, copy our sibling's values. if (useSibling) { rowSettings.relationship = 'sibling'; rowSettings.source = rowSettings.target; } var targetClass = '.' + rowSettings.target; var targetElement = $(targetClass, changedRow).get(0); // Check if a target element exists in this row. if (targetElement) { var sourceClass = '.' + rowSettings.source; var sourceElement = $(sourceClass, sourceRow).get(0); switch (rowSettings.action) { case 'depth': // Get the depth of the target row. targetElement.value = $('.indentation', $(sourceElement).closest('tr')).length; break; case 'match': // Update the value. targetElement.value = sourceElement.value; break; case 'order': var siblings = this.rowObject.findSiblings(rowSettings); if ($(targetElement).is('select')) { // Get a list of acceptable values. var values = []; $('option', targetElement).each(function () { values.push(this.value); }); var maxVal = values[values.length - 1]; // Populate the values in the siblings. $(targetClass, siblings).each(function () { // If there are more items than possible values, assign the maximum value to the row. if (values.length > 0) { this.value = values.shift(); } else { this.value = maxVal; } }); } else { // Assume a numeric input field. var weight = parseInt($(targetClass, siblings[0]).val(), 10) || 0; $(targetClass, siblings).each(function () { this.value = weight; weight++; }); } break; } } }; /** * Copy all special tableDrag classes from one row's form elements to a * different one, removing any special classes that the destination row * may have had. */ Drupal.tableDrag.prototype.copyDragClasses = function (sourceRow, targetRow, group) { var sourceElement = $('.' + group, sourceRow); var targetElement = $('.' + group, targetRow); if (sourceElement.length && targetElement.length) { targetElement[0].className = sourceElement[0].className; } }; Drupal.tableDrag.prototype.checkScroll = function (cursorY) { var de = document.documentElement; var b = document.body; var windowHeight = this.windowHeight = window.innerHeight || (de.clientHeight && de.clientWidth != 0 ? de.clientHeight : b.offsetHeight); var scrollY = this.scrollY = (document.all ? (!de.scrollTop ? b.scrollTop : de.scrollTop) : (window.pageYOffset ? window.pageYOffset : window.scrollY)); var trigger = this.scrollSettings.trigger; var delta = 0; // Return a scroll speed relative to the edge of the screen. if (cursorY - scrollY > windowHeight - trigger) { delta = trigger / (windowHeight + scrollY - cursorY); delta = (delta > 0 && delta < trigger) ? delta : trigger; return delta * this.scrollSettings.amount; } else if (cursorY - scrollY < trigger) { delta = trigger / (cursorY - scrollY); delta = (delta > 0 && delta < trigger) ? delta : trigger; return -delta * this.scrollSettings.amount; } }; Drupal.tableDrag.prototype.setScroll = function (scrollAmount) { var self = this; this.scrollInterval = setInterval(function () { // Update the scroll values stored in the object. self.checkScroll(self.currentMouseCoords.y); var aboveTable = self.scrollY > self.table.topY; var belowTable = self.scrollY + self.windowHeight < self.table.bottomY; if (scrollAmount > 0 && belowTable || scrollAmount < 0 && aboveTable) { window.scrollBy(0, scrollAmount); } }, this.scrollSettings.interval); }; Drupal.tableDrag.prototype.restripeTable = function () { // :even and :odd are reversed because jQuery counts from 0 and // we count from 1, so we're out of sync. // Match immediate children of the parent element to allow nesting. $('> tbody > tr.draggable:visible, > tr.draggable:visible', this.table) .removeClass('odd even') .filter(':odd').addClass('even').end() .filter(':even').addClass('odd'); }; /** * Stub function. Allows a custom handler when a row begins dragging. */ Drupal.tableDrag.prototype.onDrag = function () { return null; }; /** * Stub function. Allows a custom handler when a row is dropped. */ Drupal.tableDrag.prototype.onDrop = function () { return null; }; /** * Constructor to make a new object to manipulate a table row. * * @param tableRow * The DOM element for the table row we will be manipulating. * @param method * The method in which this row is being moved. Either 'keyboard' or 'mouse'. * @param indentEnabled * Whether the containing table uses indentations. Used for optimizations. * @param maxDepth * The maximum amount of indentations this row may contain. * @param addClasses * Whether we want to add classes to this row to indicate child relationships. */ Drupal.tableDrag.prototype.row = function (tableRow, method, indentEnabled, maxDepth, addClasses) { this.element = tableRow; this.method = method; this.group = [tableRow]; this.groupDepth = $('.indentation', tableRow).length; this.changed = false; this.table = $(tableRow).closest('table').get(0); this.indentEnabled = indentEnabled; this.maxDepth = maxDepth; this.direction = ''; // Direction the row is being moved. if (this.indentEnabled) { this.indents = $('.indentation', tableRow).length; this.children = this.findChildren(addClasses); this.group = $.merge(this.group, this.children); // Find the depth of this entire group. for (var n = 0; n < this.group.length; n++) { this.groupDepth = Math.max($('.indentation', this.group[n]).length, this.groupDepth); } } }; /** * Find all children of rowObject by indentation. * * @param addClasses * Whether we want to add classes to this row to indicate child relationships. */ Drupal.tableDrag.prototype.row.prototype.findChildren = function (addClasses) { var parentIndentation = this.indents; var currentRow = $(this.element, this.table).next('tr.draggable'); var rows = []; var child = 0; while (currentRow.length) { var rowIndentation = $('.indentation', currentRow).length; // A greater indentation indicates this is a child. if (rowIndentation > parentIndentation) { child++; rows.push(currentRow[0]); if (addClasses) { $('.indentation', currentRow).each(function (indentNum) { if (child == 1 && (indentNum == parentIndentation)) { $(this).addClass('tree-child-first'); } if (indentNum == parentIndentation) { $(this).addClass('tree-child'); } else if (indentNum > parentIndentation) { $(this).addClass('tree-child-horizontal'); } }); } } else { break; } currentRow = currentRow.next('tr.draggable'); } if (addClasses && rows.length) { $('.indentation:nth-child(' + (parentIndentation + 1) + ')', rows[rows.length - 1]).addClass('tree-child-last'); } return rows; }; /** * Ensure that two rows are allowed to be swapped. * * @param row * DOM object for the row being considered for swapping. */ Drupal.tableDrag.prototype.row.prototype.isValidSwap = function (row) { if (this.indentEnabled) { var prevRow, nextRow; if (this.direction == 'down') { prevRow = row; nextRow = $(row).next('tr').get(0); } else { prevRow = $(row).prev('tr').get(0); nextRow = row; } this.interval = this.validIndentInterval(prevRow, nextRow); // We have an invalid swap if the valid indentations interval is empty. if (this.interval.min > this.interval.max) { return false; } } // Do not let an un-draggable first row have anything put before it. if (this.table.tBodies[0].rows[0] == row && $(row).is(':not(.draggable)')) { return false; } return true; }; /** * Perform the swap between two rows. * * @param position * Whether the swap will occur 'before' or 'after' the given row. * @param row * DOM element what will be swapped with the row group. */ Drupal.tableDrag.prototype.row.prototype.swap = function (position, row) { Drupal.detachBehaviors(this.group, Drupal.settings, 'move'); $(row)[position](this.group); Drupal.attachBehaviors(this.group, Drupal.settings); this.changed = true; this.onSwap(row); }; /** * Determine the valid indentations interval for the row at a given position * in the table. * * @param prevRow * DOM object for the row before the tested position * (or null for first position in the table). * @param nextRow * DOM object for the row after the tested position * (or null for last position in the table). */ Drupal.tableDrag.prototype.row.prototype.validIndentInterval = function (prevRow, nextRow) { var minIndent, maxIndent; // Minimum indentation: // Do not orphan the next row. minIndent = nextRow ? $('.indentation', nextRow).length : 0; // Maximum indentation: if (!prevRow || $(prevRow).is(':not(.draggable)') || $(this.element).is('.tabledrag-root')) { // Do not indent: // - the first row in the table, // - rows dragged below a non-draggable row, // - 'root' rows. maxIndent = 0; } else { // Do not go deeper than as a child of the previous row. maxIndent = $('.indentation', prevRow).length + ($(prevRow).is('.tabledrag-leaf') ? 0 : 1); // Limit by the maximum allowed depth for the table. if (this.maxDepth) { maxIndent = Math.min(maxIndent, this.maxDepth - (this.groupDepth - this.indents)); } } return { 'min': minIndent, 'max': maxIndent }; }; /** * Indent a row within the legal bounds of the table. * * @param indentDiff * The number of additional indentations proposed for the row (can be * positive or negative). This number will be adjusted to nearest valid * indentation level for the row. */ Drupal.tableDrag.prototype.row.prototype.indent = function (indentDiff) { // Determine the valid indentations interval if not available yet. if (!this.interval) { var prevRow = $(this.element).prev('tr').get(0); var nextRow = $(this.group).filter(':last').next('tr').get(0); this.interval = this.validIndentInterval(prevRow, nextRow); } // Adjust to the nearest valid indentation. var indent = this.indents + indentDiff; indent = Math.max(indent, this.interval.min); indent = Math.min(indent, this.interval.max); indentDiff = indent - this.indents; for (var n = 1; n <= Math.abs(indentDiff); n++) { // Add or remove indentations. if (indentDiff < 0) { $('.indentation:first', this.group).remove(); this.indents--; } else { $('td:first', this.group).prepend(Drupal.theme('tableDragIndentation')); this.indents++; } } if (indentDiff) { // Update indentation for this row. this.changed = true; this.groupDepth += indentDiff; this.onIndent(); } return indentDiff; }; /** * Find all siblings for a row, either according to its subgroup or indentation. * Note that the passed-in row is included in the list of siblings. * * @param settings * The field settings we're using to identify what constitutes a sibling. */ Drupal.tableDrag.prototype.row.prototype.findSiblings = function (rowSettings) { var siblings = []; var directions = ['prev', 'next']; var rowIndentation = this.indents; for (var d = 0; d < directions.length; d++) { var checkRow = $(this.element)[directions[d]](); while (checkRow.length) { // Check that the sibling contains a similar target field. if ($('.' + rowSettings.target, checkRow)) { // Either add immediately if this is a flat table, or check to ensure // that this row has the same level of indentation. if (this.indentEnabled) { var checkRowIndentation = $('.indentation', checkRow).length; } if (!(this.indentEnabled) || (checkRowIndentation == rowIndentation)) { siblings.push(checkRow[0]); } else if (checkRowIndentation < rowIndentation) { // No need to keep looking for siblings when we get to a parent. break; } } else { break; } checkRow = $(checkRow)[directions[d]](); } // Since siblings are added in reverse order for previous, reverse the // completed list of previous siblings. Add the current row and continue. if (directions[d] == 'prev') { siblings.reverse(); siblings.push(this.element); } } return siblings; }; /** * Remove indentation helper classes from the current row group. */ Drupal.tableDrag.prototype.row.prototype.removeIndentClasses = function () { for (var n in this.children) { $('.indentation', this.children[n]) .removeClass('tree-child') .removeClass('tree-child-first') .removeClass('tree-child-last') .removeClass('tree-child-horizontal'); } }; /** * Add an asterisk or other marker to the changed row. */ Drupal.tableDrag.prototype.row.prototype.markChanged = function () { var marker = Drupal.theme('tableDragChangedMarker'); var cell = $('td:first', this.element); if ($('span.tabledrag-changed', cell).length == 0) { cell.append(marker); } }; /** * Stub function. Allows a custom handler when a row is indented. */ Drupal.tableDrag.prototype.row.prototype.onIndent = function () { return null; }; /** * Stub function. Allows a custom handler when a row is swapped. */ Drupal.tableDrag.prototype.row.prototype.onSwap = function (swappedRow) { return null; }; Drupal.theme.prototype.tableDragChangedMarker = function () { return '*'; }; Drupal.theme.prototype.tableDragIndentation = function () { return '
 
'; }; Drupal.theme.prototype.tableDragChangedWarning = function () { return '
' + Drupal.theme('tableDragChangedMarker') + ' ' + Drupal.t('Changes made in this table will not be saved until the form is submitted.') + '
'; }; })(jQuery);