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https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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108 lines
2.9 KiB
JavaScript
108 lines
2.9 KiB
JavaScript
/*!
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* VisualEditor MetaLinearData class.
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*
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* Class containing meta linear data and an index-value store.
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*
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* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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/**
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* Meta linear data storage
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*
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* @class
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* @extends ve.dm.LinearData
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* @constructor
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* @param {ve.dm.IndexValueStore} store Index-value store
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* @param {Array} [data] Linear data
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*/
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ve.dm.MetaLinearData = function VeDmMetaLinearData( store, data ) {
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ve.dm.LinearData.call( this, store, data );
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};
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/* Inheritance */
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OO.inheritClass( ve.dm.MetaLinearData, ve.dm.LinearData );
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/* Static Methods */
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/**
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* Takes an array of meta linear data arrays and collapses them into a single array
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* wrapped in an array.
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*
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* Undefined values will be discarded e.g.
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* [ [ metaItem1, metaItem2 ], undefined, [ metaItem3 ], undefined ]
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* =>
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* [ [ metaItem1, metaItem2, metaItem3 ] ]
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*
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* If all values are undefined, the result is undefined wrapped in an array:
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* [ undefined, undefined, ... ]
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* =>
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* [ undefined ]
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*
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* But if some of the values are empty arrays, the result is an empty array wrapped in an array:
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* [ undefined, [], undefined, undefined, [] ]
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* =>
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* [ [] ]
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*
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* @static
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* @param {Array} data Meta linear data arrays
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* @returns {Array} Merged data
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*/
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ve.dm.MetaLinearData.static.merge = function ( data ) {
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var i, merged = [], allUndefined = true;
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for ( i = 0; i < data.length; i++ ) {
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if ( data[i] !== undefined ) {
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allUndefined = false;
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merged = merged.concat( data[i] );
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}
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}
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return allUndefined ? [ undefined ] : [ merged ];
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};
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/* Methods */
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/**
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* Gets linear data from specified index(es).
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*
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* If either index is omitted the array at that point is returned
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*
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* @method
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* @param {number} [offset] Offset to get data from
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* @param {number} [metadataOffset] Index to get data from
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* @returns {Object|Array} Data from index(es), or all data (by reference)
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*/
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ve.dm.MetaLinearData.prototype.getData = function ( offset, metadataOffset ) {
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if ( offset === undefined ) {
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return this.data;
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} else if ( metadataOffset === undefined ) {
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return this.data[offset];
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} else {
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return this.data[offset] === undefined ? undefined : this.data[offset][metadataOffset];
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}
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};
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/**
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* Gets number of metadata elements at specified offset.
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*
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* @method
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* @param {number} offset Offset to count metadata at
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* @returns {number} Number of metadata elements at specified offset
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*/
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ve.dm.MetaLinearData.prototype.getDataLength = function ( offset ) {
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return this.data[offset] === undefined ? 0 : this.data[offset].length;
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};
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/**
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* Gets number of metadata elements in the entire object.
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*
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* @method
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* @returns {number} Number of metadata elements in the entire object
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*/
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ve.dm.MetaLinearData.prototype.getTotalDataLength = function () {
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var n = 0, i = this.getLength();
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while ( i-- ) {
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n += this.getDataLength( i );
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}
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return n;
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}; |