( function ( mw, $ ) { /** * Module handling the slider logic of the RevisionSlider * * @param {RevisionList} revisions * @constructor */ var Slider = function ( revisions ) { this.revisions = revisions; this.view = new mw.libs.revisionSlider.SliderView( this ); }; $.extend( Slider.prototype, { /** * @type {RevisionList} */ revisions: null, /** * @type {number} */ oldestVisibleRevisionIndex: 0, /** * @type {number} */ revisionsPerWindow: 0, /** * @type {SliderView} */ view: null, /** * @return {RevisionList} */ getRevisions: function () { return this.revisions; }, /** * @return {SliderView} */ getView: function () { return this.view; }, /** * Sets the number of revisions that are visible at once (depending on browser window size) * * @param {number} n */ setRevisionsPerWindow: function ( n ) { this.revisionsPerWindow = n; }, /** * @return {number} */ getRevisionsPerWindow: function () { return this.revisionsPerWindow; }, /** * Returns the index of the oldest revision that is visible in the current window * * @return {number} */ getOldestVisibleRevisionIndex: function () { return this.oldestVisibleRevisionIndex; }, /** * Returns the index of the newest revision that is visible in the current window * * @return {number} */ getNewestVisibleRevisionIndex: function () { return this.oldestVisibleRevisionIndex + this.revisionsPerWindow - 1; }, /** * @return {boolean} */ isAtStart: function () { return this.getOldestVisibleRevisionIndex() === 0 || this.revisions.getLength() <= this.revisionsPerWindow; }, /** * @return {boolean} */ isAtEnd: function () { return this.getNewestVisibleRevisionIndex() === this.revisions.getLength() - 1 || this.revisions.getLength() <= this.revisionsPerWindow; }, /** * Sets the index of the first revision that is visible in the current window * * @param {number} value */ setFirstVisibleRevisionIndex: function ( value ) { this.oldestVisibleRevisionIndex = value; }, /** * Sets the new oldestVisibleRevisionIndex after sliding in a direction * * @param {number} direction - Either -1 or 1 */ slide: function ( direction ) { var highestPossibleFirstRev = this.revisions.getLength() - this.revisionsPerWindow; this.oldestVisibleRevisionIndex += direction * this.revisionsPerWindow; this.oldestVisibleRevisionIndex = Math.min( this.oldestVisibleRevisionIndex, highestPossibleFirstRev ); this.oldestVisibleRevisionIndex = Math.max( 0, this.oldestVisibleRevisionIndex ); } } ); mw.libs.revisionSlider = mw.libs.revisionSlider || {}; mw.libs.revisionSlider.Slider = Slider; }( mediaWiki, jQuery ) );