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blockregion.js
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blocks.js
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manager.js
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shared.js
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Editing: blockregion.js
/** * This file contains the Block Region class used by the drag and drop manager. * * Provides drag and drop functionality for blocks. * * @module moodle-core-blockdraganddrop */ /** * Constructs a new block region object. * * @namespace M.core.blockdraganddrop * @class BlockRegion * @constructor * @extends Base */ BLOCKREGION = function() { BLOCKREGION.superclass.constructor.apply(this, arguments); }; BLOCKREGION.prototype = { /** * Called during the initialisation process of the object. * @method initializer */ initializer: function() { var node = this.get('node'); Y.log('Block region `' + this.get('region') + '` initialising', 'info'); if (!node) { Y.log('block region known about but no HTML structure found for it. Guessing structure.', 'warn'); node = this.create_and_add_node(); } var body = Y.one('body'), hasblocks = node.all('.' + CSS.BLOCK).size() > 0, hasregionclass = this.get_has_region_class(); this.set('hasblocks', hasblocks); if (!body.hasClass(hasregionclass)) { body.addClass(hasregionclass); } body.addClass((hasblocks) ? this.get_used_region_class() : this.get_empty_region_class()); body.removeClass((hasblocks) ? this.get_empty_region_class() : this.get_used_region_class()); }, /** * Creates a generic block region node and adds it to the DOM at the best guess location. * Any calling of this method is an unfortunate circumstance. * @method create_and_add_node * @return Node The newly created Node */ create_and_add_node: function() { var c = Y.Node.create, region = this.get('region'), node = c('<div id="block-region-' + region + '" data-droptarget="1"></div>') .addClass(CSS.BLOCKREGION) .setData('blockregion', region), regions = this.get('manager').get('regions'), i, haspre = false, haspost = false, added = false, pre, post; for (i in regions) { if (regions[i].match(/(pre|left)/)) { haspre = regions[i]; } else if (regions[i].match(/(post|right)/)) { haspost = regions[i]; } } if (haspre !== false && haspost !== false) { if (region === haspre) { post = Y.one('#block-region-' + haspost); if (post) { post.insert(node, 'before'); added = true; } } else { pre = Y.one('#block-region-' + haspre); if (pre) { pre.insert(node, 'after'); added = true; } } } if (added === false) { Y.one('body').append(node); } this.set('node', node); return node; }, /** * Change the move icons to enhanced drag handles and changes the cursor to a move icon when over the header. * @param M.core.dragdrop the block manager * @method change_block_move_icons */ change_block_move_icons: function(manager) { var handle; this.get('node').all('.' + CSS.BLOCK + ' a.' + CSS.EDITINGMOVE).each(function(moveicon) { moveicon.setStyle('cursor', 'move'); handle = manager.get_drag_handle(moveicon.getAttribute('title'), '', 'icon', true); // Dragdrop module assigns this with a button role by default. // However, the block move icon is part of a menubar, so it should have a menuitem role. handle.setAttribute('role', 'menuitem'); moveicon.replace(handle); }); }, /** * Returns the class name on the body that signifies the document knows about this region. * @method get_has_region_class * @return String */ get_has_region_class: function() { return 'has-region-' + this.get('region'); }, /** * Returns the class name to use on the body if the region contains no blocks. * @method get_empty_region_class * @return String */ get_empty_region_class: function() { return 'empty-region-' + this.get('region'); }, /** * Returns the class name to use on the body if the region contains blocks. * @method get_used_region_class * @return String */ get_used_region_class: function() { return 'used-region-' + this.get('region'); }, /** * Returns the node to use as the drop target for this region. * @method get_droptarget * @return Node */ get_droptarget: function() { var node = this.get('node'); if (node.test('[data-droptarget="1"]')) { return node; } return node.one('[data-droptarget="1"]'); }, /** * Enables the block region so that we can be sure the user can see it. * This is done even if it is empty. * @method enable */ enable: function() { Y.one('body').addClass(this.get_used_region_class()).removeClass(this.get_empty_region_class()); }, /** * Disables the region if it contains no blocks, essentially hiding it from the user. * @method disable_if_required */ disable_if_required: function() { if (this.get('node').all('.' + CSS.BLOCK).size() === 0) { Y.one('body').addClass(this.get_empty_region_class()).removeClass(this.get_used_region_class()); } } }; Y.extend(BLOCKREGION, Y.Base, BLOCKREGION.prototype, { NAME: 'core-blocks-dragdrop-blockregion', ATTRS: { /** * The drag and drop manager that created this block region instance. * @attribute manager * @type M.core.blockdraganddrop.Manager * @writeOnce */ manager: { // Can only be set during initialisation and must be set then. writeOnce: 'initOnly', validator: function(value) { return Y.Lang.isObject(value) && value instanceof MANAGER; } }, /** * The name of the block region this object represents. * @attribute region * @type String * @writeOnce */ region: { // Can only be set during initialisation and must be set then. writeOnce: 'initOnly', validator: function(value) { return Y.Lang.isString(value); } }, /** * The node the block region HTML starts at.s * @attribute region * @type Y.Node */ node: { validator: function(value) { return Y.Lang.isObject(value) || Y.Lang.isNull(value); } }, /** * True if the block region currently contains blocks. * @attribute hasblocks * @type Boolean * @default false */ hasblocks: { value: false, validator: function(value) { return Y.Lang.isBoolean(value); } } } });
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