webmaster@1: // $Id: block.js,v 1.2 2007/12/16 10:36:53 goba Exp $
webmaster@1: 
webmaster@1: /**
webmaster@1:  * Move a block in the blocks table from one region to another via select list.
webmaster@1:  *
webmaster@1:  * This behavior is dependent on the tableDrag behavior, since it uses the
webmaster@1:  * objects initialized in that behavior to update the row.
webmaster@1:  */
webmaster@1: Drupal.behaviors.blockDrag = function(context) {
webmaster@1:   var table = $('table#blocks');
webmaster@1:   var tableDrag = Drupal.tableDrag.blocks; // Get the blocks tableDrag object.
webmaster@1: 
webmaster@1:   // Add a handler for when a row is swapped, update empty regions.
webmaster@1:   tableDrag.row.prototype.onSwap = function(swappedRow) {
webmaster@1:     checkEmptyRegions(table, this);
webmaster@1:   };
webmaster@1: 
webmaster@1:   // A custom message for the blocks page specifically.
webmaster@1:   Drupal.theme.tableDragChangedWarning = function () {
webmaster@1:     return '<div class="warning">' + Drupal.theme('tableDragChangedMarker') + ' ' + Drupal.t("The changes to these blocks will not be saved until the <em>Save blocks</em> button is clicked.") + '</div>';
webmaster@1:   };
webmaster@1: 
webmaster@1:   // Add a handler so when a row is dropped, update fields dropped into new regions.
webmaster@1:   tableDrag.onDrop = function() {
webmaster@1:     dragObject = this;
webmaster@1:     if ($(dragObject.rowObject.element).prev('tr').is('.region-message')) {
webmaster@1:       var regionRow = $(dragObject.rowObject.element).prev('tr').get(0);
webmaster@1:       var regionName = regionRow.className.replace(/([^ ]+[ ]+)*region-([^ ]+)-message([ ]+[^ ]+)*/, '$2');
webmaster@1:       var regionField = $('select.block-region-select', dragObject.rowObject.element);
webmaster@1:       var weightField = $('select.block-weight', dragObject.rowObject.element);
webmaster@1:       var oldRegionName = weightField[0].className.replace(/([^ ]+[ ]+)*block-weight-([^ ]+)([ ]+[^ ]+)*/, '$2');
webmaster@1: 
webmaster@1:       if (!regionField.is('.block-region-'+ regionName)) {
webmaster@1:         regionField.removeClass('block-region-' + oldRegionName).addClass('block-region-' + regionName);
webmaster@1:         weightField.removeClass('block-weight-' + oldRegionName).addClass('block-weight-' + regionName);
webmaster@1:         regionField.val(regionName);
webmaster@1:       }
webmaster@1:     }
webmaster@1:   };
webmaster@1: 
webmaster@1:   // Add the behavior to each region select list.
webmaster@1:   $('select.block-region-select:not(.blockregionselect-processed)', context).each(function() {
webmaster@1:     $(this).change(function(event) {
webmaster@1:       // Make our new row and select field.
webmaster@1:       var row = $(this).parents('tr:first');
webmaster@1:       var select = $(this);
webmaster@1:       tableDrag.rowObject = new tableDrag.row(row);
webmaster@1: 
webmaster@1:       // Find the correct region and insert the row as the first in the region.
webmaster@1:       $('tr.region-message', table).each(function() {
webmaster@1:         if ($(this).is('.region-' + select[0].value + '-message')) {
webmaster@1:           // Add the new row and remove the old one.
webmaster@1:           $(this).after(row);
webmaster@1:           // Manually update weights and restripe.
webmaster@1:           tableDrag.updateFields(row.get(0));
webmaster@1:           tableDrag.rowObject.changed = true;
webmaster@1:           if (tableDrag.oldRowElement) {
webmaster@1:             $(tableDrag.oldRowElement).removeClass('drag-previous');
webmaster@1:           }
webmaster@1:           tableDrag.oldRowElement = row.get(0);
webmaster@1:           tableDrag.restripeTable();
webmaster@1:           tableDrag.rowObject.markChanged();
webmaster@1:           tableDrag.oldRowElement = row;
webmaster@1:           $(row).addClass('drag-previous');
webmaster@1:         }
webmaster@1:       });
webmaster@1: 
webmaster@1:       // Modify empty regions with added or removed fields.
webmaster@1:       checkEmptyRegions(table, row);
webmaster@1:       // Remove focus from selectbox.
webmaster@1:       select.get(0).blur();
webmaster@1:     });
webmaster@1:     $(this).addClass('blockregionselect-processed');
webmaster@1:   });
webmaster@1: 
webmaster@1:   var checkEmptyRegions = function(table, rowObject) {
webmaster@1:     $('tr.region-message', table).each(function() {
webmaster@1:       // If the dragged row is in this region, but above the message row, swap it down one space.
webmaster@1:       if ($(this).prev('tr').get(0) == rowObject.element) {
webmaster@1:         // Prevent a recursion problem when using the keyboard to move rows up.
webmaster@1:         if ((rowObject.method != 'keyboard' || rowObject.direction == 'down')) {
webmaster@1:           rowObject.swap('after', this);
webmaster@1:         }
webmaster@1:       }
webmaster@1:       // This region has become empty
webmaster@1:       if ($(this).next('tr').is(':not(.draggable)') || $(this).next('tr').size() == 0) {
webmaster@1:         $(this).removeClass('region-populated').addClass('region-empty');
webmaster@1:       }
webmaster@1:       // This region has become populated.
webmaster@1:       else if ($(this).is('.region-empty')) {
webmaster@1:         $(this).removeClass('region-empty').addClass('region-populated');
webmaster@1:       }
webmaster@1:     });
webmaster@1:   };
webmaster@1: };