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/*! * VisualEditor DataModel MetaList class. * * @copyright See AUTHORS.txt */ /** * DataModel meta list. * * @class * @mixes OO.EventEmitter * * @constructor * @param {ve.dm.Document} doc Document model */ ve.dm.MetaList = function VeDmMetaList( doc ) { // Mixin constructors OO.EventEmitter.call( this ); this.doc = doc; // Sorted array of attached ve.dm.MetaItem nodes in document order this.items = []; // The meta list is constructed before the model tree is built, so // we don't need to initialise this item list, just listen to changes this.doc.connect( this, { nodeAttached: 'onNodeAttached', nodeDetached: 'onNodeDetached' } ); }; /* Inheritance */ OO.mixinClass( ve.dm.MetaList, OO.EventEmitter ); /* Events */ /** * @event ve.dm.MetaList#insert * @param {ve.dm.MetaItem} item Item that was inserted */ /** * @event ve.dm.MetaList#remove * @param {ve.dm.MetaItem} item Item that was removed */ /* Methods */ /** * If a ve.dm.MetaItem was attached, insert it into items in document order * * @param {ve.dm.Node} node The node that was attached */ ve.dm.MetaList.prototype.onNodeAttached = function ( node ) { const offsetPath = node.getOffsetPath(); if ( node instanceof ve.dm.MetaItem ) { const i = OO.binarySearch( this.items, ( other ) => ve.compareTuples( offsetPath, other.getOffsetPath() ), true ); this.items.splice( i, 0, node ); this.emit( 'insert', node ); } }; /** * If a ve.dm.MetaItem was detached, remove it from items * * @param {ve.dm.Node} node The node that was detached */ ve.dm.MetaList.prototype.onNodeDetached = function ( node ) { if ( node instanceof ve.dm.MetaItem ) { const i = this.items.indexOf( node ); if ( i !== -1 ) { this.items.splice( i, 1 ); this.emit( 'remove', node ); } } }; ve.dm.MetaList.prototype.indexOf = function ( item, group ) { const items = group ? this.getItemsInGroup( group ) : this.items; return items.indexOf( item ); }; /** * Get all items in a group. * * This function returns a shallow copy, so the array isn't returned by reference but the items * themselves are. * * @param {string} group * @return {ve.dm.MetaItem[]} Array of items in the group (shallow copy) */ ve.dm.MetaList.prototype.getItemsInGroup = function ( group ) { return this.items.filter( ( item ) => item.getGroup() === group ); }; /** * Get all items in the list. * * This function returns a shallow copy, so the array isn't returned by reference but the items * themselves are. * * @return {ve.dm.MetaItem[]} Array of items in the list */ ve.dm.MetaList.prototype.getItems = function () { return this.items.slice(); };
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