1167 lines
33 KiB
JavaScript
1167 lines
33 KiB
JavaScript
/* global isRtl */
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/**
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* @file Revisions interface functions, Backbone classes and
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* the revisions.php document.ready bootstrap.
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*
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*/
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window.wp = window.wp || {};
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(function($) {
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var revisions;
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/**
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* Expose the module in window.wp.revisions.
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*/
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revisions = wp.revisions = { model: {}, view: {}, controller: {} };
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// Link post revisions data served from the back-end.
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revisions.settings = window._wpRevisionsSettings || {};
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// For debugging
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revisions.debug = false;
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/**
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* wp.revisions.log
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*
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* A debugging utility for revisions. Works only when a
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* debug flag is on and the browser supports it.
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*/
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revisions.log = function() {
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if ( window.console && revisions.debug ) {
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window.console.log.apply( window.console, arguments );
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}
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};
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// Handy functions to help with positioning
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$.fn.allOffsets = function() {
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var offset = this.offset() || {top: 0, left: 0}, win = $(window);
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return _.extend( offset, {
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right: win.width() - offset.left - this.outerWidth(),
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bottom: win.height() - offset.top - this.outerHeight()
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});
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};
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$.fn.allPositions = function() {
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var position = this.position() || {top: 0, left: 0}, parent = this.parent();
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return _.extend( position, {
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right: parent.outerWidth() - position.left - this.outerWidth(),
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bottom: parent.outerHeight() - position.top - this.outerHeight()
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});
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};
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/**
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* ========================================================================
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* MODELS
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* ========================================================================
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*/
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revisions.model.Slider = Backbone.Model.extend({
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defaults: {
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value: null,
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values: null,
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min: 0,
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max: 1,
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step: 1,
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range: false,
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compareTwoMode: false
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},
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initialize: function( options ) {
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this.frame = options.frame;
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this.revisions = options.revisions;
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// Listen for changes to the revisions or mode from outside
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this.listenTo( this.frame, 'update:revisions', this.receiveRevisions );
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this.listenTo( this.frame, 'change:compareTwoMode', this.updateMode );
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// Listen for internal changes
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this.on( 'change:from', this.handleLocalChanges );
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this.on( 'change:to', this.handleLocalChanges );
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this.on( 'change:compareTwoMode', this.updateSliderSettings );
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this.on( 'update:revisions', this.updateSliderSettings );
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// Listen for changes to the hovered revision
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this.on( 'change:hoveredRevision', this.hoverRevision );
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this.set({
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max: this.revisions.length - 1,
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compareTwoMode: this.frame.get('compareTwoMode'),
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from: this.frame.get('from'),
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to: this.frame.get('to')
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});
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this.updateSliderSettings();
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},
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getSliderValue: function( a, b ) {
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return isRtl ? this.revisions.length - this.revisions.indexOf( this.get(a) ) - 1 : this.revisions.indexOf( this.get(b) );
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},
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updateSliderSettings: function() {
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if ( this.get('compareTwoMode') ) {
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this.set({
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values: [
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this.getSliderValue( 'to', 'from' ),
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this.getSliderValue( 'from', 'to' )
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],
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value: null,
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range: true // ensures handles cannot cross
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});
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} else {
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this.set({
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value: this.getSliderValue( 'to', 'to' ),
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values: null,
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range: false
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});
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}
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this.trigger( 'update:slider' );
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},
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// Called when a revision is hovered
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hoverRevision: function( model, value ) {
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this.trigger( 'hovered:revision', value );
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},
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// Called when `compareTwoMode` changes
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updateMode: function( model, value ) {
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this.set({ compareTwoMode: value });
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},
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// Called when `from` or `to` changes in the local model
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handleLocalChanges: function() {
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this.frame.set({
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from: this.get('from'),
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to: this.get('to')
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});
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},
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// Receives revisions changes from outside the model
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receiveRevisions: function( from, to ) {
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// Bail if nothing changed
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if ( this.get('from') === from && this.get('to') === to ) {
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return;
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}
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this.set({ from: from, to: to }, { silent: true });
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this.trigger( 'update:revisions', from, to );
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}
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});
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revisions.model.Tooltip = Backbone.Model.extend({
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defaults: {
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revision: null,
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offset: {},
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hovering: false, // Whether the mouse is hovering
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scrubbing: false // Whether the mouse is scrubbing
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},
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initialize: function( options ) {
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this.frame = options.frame;
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this.revisions = options.revisions;
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this.slider = options.slider;
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this.listenTo( this.slider, 'hovered:revision', this.updateRevision );
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this.listenTo( this.slider, 'change:hovering', this.setHovering );
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this.listenTo( this.slider, 'change:scrubbing', this.setScrubbing );
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},
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updateRevision: function( revision ) {
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this.set({ revision: revision });
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},
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setHovering: function( model, value ) {
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this.set({ hovering: value });
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},
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setScrubbing: function( model, value ) {
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this.set({ scrubbing: value });
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}
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});
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revisions.model.Revision = Backbone.Model.extend({});
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/**
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* wp.revisions.model.Revisions
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*
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* A collection of post revisions.
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*/
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revisions.model.Revisions = Backbone.Collection.extend({
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model: revisions.model.Revision,
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initialize: function() {
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_.bindAll( this, 'next', 'prev' );
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},
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next: function( revision ) {
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var index = this.indexOf( revision );
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if ( index !== -1 && index !== this.length - 1 ) {
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return this.at( index + 1 );
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}
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},
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prev: function( revision ) {
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var index = this.indexOf( revision );
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if ( index !== -1 && index !== 0 ) {
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return this.at( index - 1 );
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}
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}
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});
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revisions.model.Field = Backbone.Model.extend({});
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revisions.model.Fields = Backbone.Collection.extend({
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model: revisions.model.Field
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});
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revisions.model.Diff = Backbone.Model.extend({
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initialize: function() {
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var fields = this.get('fields');
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this.unset('fields');
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this.fields = new revisions.model.Fields( fields );
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}
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});
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revisions.model.Diffs = Backbone.Collection.extend({
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initialize: function( models, options ) {
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_.bindAll( this, 'getClosestUnloaded' );
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this.loadAll = _.once( this._loadAll );
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this.revisions = options.revisions;
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this.postId = options.postId;
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this.requests = {};
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},
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model: revisions.model.Diff,
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ensure: function( id, context ) {
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var diff = this.get( id ),
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request = this.requests[ id ],
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deferred = $.Deferred(),
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ids = {},
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from = id.split(':')[0],
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to = id.split(':')[1];
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ids[id] = true;
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wp.revisions.log( 'ensure', id );
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this.trigger( 'ensure', ids, from, to, deferred.promise() );
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if ( diff ) {
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deferred.resolveWith( context, [ diff ] );
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} else {
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this.trigger( 'ensure:load', ids, from, to, deferred.promise() );
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_.each( ids, _.bind( function( id ) {
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// Remove anything that has an ongoing request
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if ( this.requests[ id ] ) {
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delete ids[ id ];
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}
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// Remove anything we already have
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if ( this.get( id ) ) {
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delete ids[ id ];
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}
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}, this ) );
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if ( ! request ) {
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// Always include the ID that started this ensure
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ids[ id ] = true;
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request = this.load( _.keys( ids ) );
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}
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request.done( _.bind( function() {
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deferred.resolveWith( context, [ this.get( id ) ] );
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}, this ) ).fail( _.bind( function() {
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deferred.reject();
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}) );
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}
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return deferred.promise();
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},
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// Returns an array of proximal diffs
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getClosestUnloaded: function( ids, centerId ) {
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var self = this;
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return _.chain([0].concat( ids )).initial().zip( ids ).sortBy( function( pair ) {
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return Math.abs( centerId - pair[1] );
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}).map( function( pair ) {
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return pair.join(':');
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}).filter( function( diffId ) {
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return _.isUndefined( self.get( diffId ) ) && ! self.requests[ diffId ];
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}).value();
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},
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_loadAll: function( allRevisionIds, centerId, num ) {
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var self = this, deferred = $.Deferred(),
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diffs = _.first( this.getClosestUnloaded( allRevisionIds, centerId ), num );
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if ( _.size( diffs ) > 0 ) {
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this.load( diffs ).done( function() {
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self._loadAll( allRevisionIds, centerId, num ).done( function() {
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deferred.resolve();
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});
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}).fail( function() {
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if ( 1 === num ) { // Already tried 1. This just isn't working. Give up.
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deferred.reject();
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} else { // Request fewer diffs this time
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self._loadAll( allRevisionIds, centerId, Math.ceil( num / 2 ) ).done( function() {
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deferred.resolve();
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});
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}
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});
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} else {
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deferred.resolve();
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}
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return deferred;
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},
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load: function( comparisons ) {
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wp.revisions.log( 'load', comparisons );
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// Our collection should only ever grow, never shrink, so remove: false
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return this.fetch({ data: { compare: comparisons }, remove: false }).done( function() {
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wp.revisions.log( 'load:complete', comparisons );
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});
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},
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sync: function( method, model, options ) {
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if ( 'read' === method ) {
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options = options || {};
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options.context = this;
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options.data = _.extend( options.data || {}, {
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action: 'get-revision-diffs',
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post_id: this.postId
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});
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var deferred = wp.ajax.send( options ),
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requests = this.requests;
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// Record that we're requesting each diff.
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if ( options.data.compare ) {
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_.each( options.data.compare, function( id ) {
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requests[ id ] = deferred;
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});
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}
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// When the request completes, clear the stored request.
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deferred.always( function() {
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if ( options.data.compare ) {
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_.each( options.data.compare, function( id ) {
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delete requests[ id ];
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});
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}
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});
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return deferred;
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// Otherwise, fall back to `Backbone.sync()`.
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} else {
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return Backbone.Model.prototype.sync.apply( this, arguments );
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}
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}
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});
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/**
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* wp.revisions.model.FrameState
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*
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* The frame state.
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*
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* @see wp.revisions.view.Frame
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*
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* @param {object} attributes Model attributes - none are required.
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* @param {object} options Options for the model.
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* @param {revisions.model.Revisions} options.revisions A collection of revisions.
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*/
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revisions.model.FrameState = Backbone.Model.extend({
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defaults: {
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loading: false,
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error: false,
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compareTwoMode: false
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},
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initialize: function( attributes, options ) {
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var state = this.get( 'initialDiffState' );
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_.bindAll( this, 'receiveDiff' );
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this._debouncedEnsureDiff = _.debounce( this._ensureDiff, 200 );
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this.revisions = options.revisions;
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this.diffs = new revisions.model.Diffs( [], {
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revisions: this.revisions,
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postId: this.get( 'postId' )
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} );
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// Set the initial diffs collection.
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this.diffs.set( this.get( 'diffData' ) );
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// Set up internal listeners
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this.listenTo( this, 'change:from', this.changeRevisionHandler );
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this.listenTo( this, 'change:to', this.changeRevisionHandler );
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this.listenTo( this, 'change:compareTwoMode', this.changeMode );
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this.listenTo( this, 'update:revisions', this.updatedRevisions );
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this.listenTo( this.diffs, 'ensure:load', this.updateLoadingStatus );
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this.listenTo( this, 'update:diff', this.updateLoadingStatus );
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// Set the initial revisions, baseUrl, and mode as provided through attributes.
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this.set( {
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to : this.revisions.get( state.to ),
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from : this.revisions.get( state.from ),
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compareTwoMode : state.compareTwoMode
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} );
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// Start the router if browser supports History API
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if ( window.history && window.history.pushState ) {
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this.router = new revisions.Router({ model: this });
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Backbone.history.start({ pushState: true });
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}
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},
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updateLoadingStatus: function() {
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this.set( 'error', false );
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this.set( 'loading', ! this.diff() );
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},
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changeMode: function( model, value ) {
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var toIndex = this.revisions.indexOf( this.get( 'to' ) );
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// If we were on the first revision before switching to two-handled mode,
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// bump the 'to' position over one
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if ( value && 0 === toIndex ) {
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this.set({
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from: this.revisions.at( toIndex ),
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to: this.revisions.at( toIndex + 1 )
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});
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}
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// When switching back to single-handled mode, reset 'from' model to
|
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// one position before the 'to' model
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if ( ! value && 0 !== toIndex ) { // '! value' means switching to single-handled mode
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this.set({
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from: this.revisions.at( toIndex - 1 ),
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to: this.revisions.at( toIndex )
|
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});
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}
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},
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updatedRevisions: function( from, to ) {
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if ( this.get( 'compareTwoMode' ) ) {
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// TODO: compare-two loading strategy
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} else {
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this.diffs.loadAll( this.revisions.pluck('id'), to.id, 40 );
|
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}
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},
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||
|
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// Fetch the currently loaded diff.
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||
diff: function() {
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return this.diffs.get( this._diffId );
|
||
},
|
||
|
||
// So long as `from` and `to` are changed at the same time, the diff
|
||
// will only be updated once. This is because Backbone updates all of
|
||
// the changed attributes in `set`, and then fires the `change` events.
|
||
updateDiff: function( options ) {
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||
var from, to, diffId, diff;
|
||
|
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options = options || {};
|
||
from = this.get('from');
|
||
to = this.get('to');
|
||
diffId = ( from ? from.id : 0 ) + ':' + to.id;
|
||
|
||
// Check if we're actually changing the diff id.
|
||
if ( this._diffId === diffId ) {
|
||
return $.Deferred().reject().promise();
|
||
}
|
||
|
||
this._diffId = diffId;
|
||
this.trigger( 'update:revisions', from, to );
|
||
|
||
diff = this.diffs.get( diffId );
|
||
|
||
// If we already have the diff, then immediately trigger the update.
|
||
if ( diff ) {
|
||
this.receiveDiff( diff );
|
||
return $.Deferred().resolve().promise();
|
||
// Otherwise, fetch the diff.
|
||
} else {
|
||
if ( options.immediate ) {
|
||
return this._ensureDiff();
|
||
} else {
|
||
this._debouncedEnsureDiff();
|
||
return $.Deferred().reject().promise();
|
||
}
|
||
}
|
||
},
|
||
|
||
// A simple wrapper around `updateDiff` to prevent the change event's
|
||
// parameters from being passed through.
|
||
changeRevisionHandler: function() {
|
||
this.updateDiff();
|
||
},
|
||
|
||
receiveDiff: function( diff ) {
|
||
// Did we actually get a diff?
|
||
if ( _.isUndefined( diff ) || _.isUndefined( diff.id ) ) {
|
||
this.set({
|
||
loading: false,
|
||
error: true
|
||
});
|
||
} else if ( this._diffId === diff.id ) { // Make sure the current diff didn't change
|
||
this.trigger( 'update:diff', diff );
|
||
}
|
||
},
|
||
|
||
_ensureDiff: function() {
|
||
return this.diffs.ensure( this._diffId, this ).always( this.receiveDiff );
|
||
}
|
||
});
|
||
|
||
|
||
/**
|
||
* ========================================================================
|
||
* VIEWS
|
||
* ========================================================================
|
||
*/
|
||
|
||
/**
|
||
* wp.revisions.view.Frame
|
||
*
|
||
* Top level frame that orchestrates the revisions experience.
|
||
*
|
||
* @param {object} options The options hash for the view.
|
||
* @param {revisions.model.FrameState} options.model The frame state model.
|
||
*/
|
||
revisions.view.Frame = wp.Backbone.View.extend({
|
||
className: 'revisions',
|
||
template: wp.template('revisions-frame'),
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'update:diff', this.renderDiff );
|
||
this.listenTo( this.model, 'change:compareTwoMode', this.updateCompareTwoMode );
|
||
this.listenTo( this.model, 'change:loading', this.updateLoadingStatus );
|
||
this.listenTo( this.model, 'change:error', this.updateErrorStatus );
|
||
|
||
this.views.set( '.revisions-control-frame', new revisions.view.Controls({
|
||
model: this.model
|
||
}) );
|
||
},
|
||
|
||
render: function() {
|
||
wp.Backbone.View.prototype.render.apply( this, arguments );
|
||
|
||
$('html').css( 'overflow-y', 'scroll' );
|
||
$('#wpbody-content .wrap').append( this.el );
|
||
this.updateCompareTwoMode();
|
||
this.renderDiff( this.model.diff() );
|
||
this.views.ready();
|
||
|
||
return this;
|
||
},
|
||
|
||
renderDiff: function( diff ) {
|
||
this.views.set( '.revisions-diff-frame', new revisions.view.Diff({
|
||
model: diff
|
||
}) );
|
||
},
|
||
|
||
updateLoadingStatus: function() {
|
||
this.$el.toggleClass( 'loading', this.model.get('loading') );
|
||
},
|
||
|
||
updateErrorStatus: function() {
|
||
this.$el.toggleClass( 'diff-error', this.model.get('error') );
|
||
},
|
||
|
||
updateCompareTwoMode: function() {
|
||
this.$el.toggleClass( 'comparing-two-revisions', this.model.get('compareTwoMode') );
|
||
}
|
||
});
|
||
|
||
/**
|
||
* wp.revisions.view.Controls
|
||
*
|
||
* The controls view.
|
||
*
|
||
* Contains the revision slider, previous/next buttons, the meta info and the compare checkbox.
|
||
*/
|
||
revisions.view.Controls = wp.Backbone.View.extend({
|
||
className: 'revisions-controls',
|
||
|
||
initialize: function() {
|
||
_.bindAll( this, 'setWidth' );
|
||
|
||
// Add the button view
|
||
this.views.add( new revisions.view.Buttons({
|
||
model: this.model
|
||
}) );
|
||
|
||
// Add the checkbox view
|
||
this.views.add( new revisions.view.Checkbox({
|
||
model: this.model
|
||
}) );
|
||
|
||
// Prep the slider model
|
||
var slider = new revisions.model.Slider({
|
||
frame: this.model,
|
||
revisions: this.model.revisions
|
||
}),
|
||
|
||
// Prep the tooltip model
|
||
tooltip = new revisions.model.Tooltip({
|
||
frame: this.model,
|
||
revisions: this.model.revisions,
|
||
slider: slider
|
||
});
|
||
|
||
// Add the tooltip view
|
||
this.views.add( new revisions.view.Tooltip({
|
||
model: tooltip
|
||
}) );
|
||
|
||
// Add the tickmarks view
|
||
this.views.add( new revisions.view.Tickmarks({
|
||
model: tooltip
|
||
}) );
|
||
|
||
// Add the slider view
|
||
this.views.add( new revisions.view.Slider({
|
||
model: slider
|
||
}) );
|
||
|
||
// Add the Metabox view
|
||
this.views.add( new revisions.view.Metabox({
|
||
model: this.model
|
||
}) );
|
||
},
|
||
|
||
ready: function() {
|
||
this.top = this.$el.offset().top;
|
||
this.window = $(window);
|
||
this.window.on( 'scroll.wp.revisions', {controls: this}, function(e) {
|
||
var controls = e.data.controls,
|
||
container = controls.$el.parent(),
|
||
scrolled = controls.window.scrollTop(),
|
||
frame = controls.views.parent;
|
||
|
||
if ( scrolled >= controls.top ) {
|
||
if ( ! frame.$el.hasClass('pinned') ) {
|
||
controls.setWidth();
|
||
container.css('height', container.height() + 'px' );
|
||
controls.window.on('resize.wp.revisions.pinning click.wp.revisions.pinning', {controls: controls}, function(e) {
|
||
e.data.controls.setWidth();
|
||
});
|
||
}
|
||
frame.$el.addClass('pinned');
|
||
} else if ( frame.$el.hasClass('pinned') ) {
|
||
controls.window.off('.wp.revisions.pinning');
|
||
controls.$el.css('width', 'auto');
|
||
frame.$el.removeClass('pinned');
|
||
container.css('height', 'auto');
|
||
controls.top = controls.$el.offset().top;
|
||
} else {
|
||
controls.top = controls.$el.offset().top;
|
||
}
|
||
});
|
||
},
|
||
|
||
setWidth: function() {
|
||
this.$el.css('width', this.$el.parent().width() + 'px');
|
||
}
|
||
});
|
||
|
||
// The tickmarks view
|
||
revisions.view.Tickmarks = wp.Backbone.View.extend({
|
||
className: 'revisions-tickmarks',
|
||
direction: isRtl ? 'right' : 'left',
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'change:revision', this.reportTickPosition );
|
||
},
|
||
|
||
reportTickPosition: function( model, revision ) {
|
||
var offset, thisOffset, parentOffset, tick, index = this.model.revisions.indexOf( revision );
|
||
thisOffset = this.$el.allOffsets();
|
||
parentOffset = this.$el.parent().allOffsets();
|
||
if ( index === this.model.revisions.length - 1 ) {
|
||
// Last one
|
||
offset = {
|
||
rightPlusWidth: thisOffset.left - parentOffset.left + 1,
|
||
leftPlusWidth: thisOffset.right - parentOffset.right + 1
|
||
};
|
||
} else {
|
||
// Normal tick
|
||
tick = this.$('div:nth-of-type(' + (index + 1) + ')');
|
||
offset = tick.allPositions();
|
||
_.extend( offset, {
|
||
left: offset.left + thisOffset.left - parentOffset.left,
|
||
right: offset.right + thisOffset.right - parentOffset.right
|
||
});
|
||
_.extend( offset, {
|
||
leftPlusWidth: offset.left + tick.outerWidth(),
|
||
rightPlusWidth: offset.right + tick.outerWidth()
|
||
});
|
||
}
|
||
this.model.set({ offset: offset });
|
||
},
|
||
|
||
ready: function() {
|
||
var tickCount, tickWidth;
|
||
tickCount = this.model.revisions.length - 1;
|
||
tickWidth = 1 / tickCount;
|
||
this.$el.css('width', ( this.model.revisions.length * 50 ) + 'px');
|
||
|
||
_(tickCount).times( function( index ){
|
||
this.$el.append( '<div style="' + this.direction + ': ' + ( 100 * tickWidth * index ) + '%"></div>' );
|
||
}, this );
|
||
}
|
||
});
|
||
|
||
// The metabox view
|
||
revisions.view.Metabox = wp.Backbone.View.extend({
|
||
className: 'revisions-meta',
|
||
|
||
initialize: function() {
|
||
// Add the 'from' view
|
||
this.views.add( new revisions.view.MetaFrom({
|
||
model: this.model,
|
||
className: 'diff-meta diff-meta-from'
|
||
}) );
|
||
|
||
// Add the 'to' view
|
||
this.views.add( new revisions.view.MetaTo({
|
||
model: this.model
|
||
}) );
|
||
}
|
||
});
|
||
|
||
// The revision meta view (to be extended)
|
||
revisions.view.Meta = wp.Backbone.View.extend({
|
||
template: wp.template('revisions-meta'),
|
||
|
||
events: {
|
||
'click .restore-revision': 'restoreRevision'
|
||
},
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'update:revisions', this.render );
|
||
},
|
||
|
||
prepare: function() {
|
||
return _.extend( this.model.toJSON()[this.type] || {}, {
|
||
type: this.type
|
||
});
|
||
},
|
||
|
||
restoreRevision: function() {
|
||
document.location = this.model.get('to').attributes.restoreUrl;
|
||
}
|
||
});
|
||
|
||
// The revision meta 'from' view
|
||
revisions.view.MetaFrom = revisions.view.Meta.extend({
|
||
className: 'diff-meta diff-meta-from',
|
||
type: 'from'
|
||
});
|
||
|
||
// The revision meta 'to' view
|
||
revisions.view.MetaTo = revisions.view.Meta.extend({
|
||
className: 'diff-meta diff-meta-to',
|
||
type: 'to'
|
||
});
|
||
|
||
// The checkbox view.
|
||
revisions.view.Checkbox = wp.Backbone.View.extend({
|
||
className: 'revisions-checkbox',
|
||
template: wp.template('revisions-checkbox'),
|
||
|
||
events: {
|
||
'click .compare-two-revisions': 'compareTwoToggle'
|
||
},
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'change:compareTwoMode', this.updateCompareTwoMode );
|
||
},
|
||
|
||
ready: function() {
|
||
if ( this.model.revisions.length < 3 ) {
|
||
$('.revision-toggle-compare-mode').hide();
|
||
}
|
||
},
|
||
|
||
updateCompareTwoMode: function() {
|
||
this.$('.compare-two-revisions').prop( 'checked', this.model.get('compareTwoMode') );
|
||
},
|
||
|
||
// Toggle the compare two mode feature when the compare two checkbox is checked.
|
||
compareTwoToggle: function() {
|
||
// Activate compare two mode?
|
||
this.model.set({ compareTwoMode: $('.compare-two-revisions').prop('checked') });
|
||
}
|
||
});
|
||
|
||
// The tooltip view.
|
||
// Encapsulates the tooltip.
|
||
revisions.view.Tooltip = wp.Backbone.View.extend({
|
||
className: 'revisions-tooltip',
|
||
template: wp.template('revisions-meta'),
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'change:offset', this.render );
|
||
this.listenTo( this.model, 'change:hovering', this.toggleVisibility );
|
||
this.listenTo( this.model, 'change:scrubbing', this.toggleVisibility );
|
||
},
|
||
|
||
prepare: function() {
|
||
if ( _.isNull( this.model.get('revision') ) ) {
|
||
return;
|
||
} else {
|
||
return _.extend( { type: 'tooltip' }, {
|
||
attributes: this.model.get('revision').toJSON()
|
||
});
|
||
}
|
||
},
|
||
|
||
render: function() {
|
||
var otherDirection,
|
||
direction,
|
||
directionVal,
|
||
flipped,
|
||
css = {},
|
||
position = this.model.revisions.indexOf( this.model.get('revision') ) + 1;
|
||
|
||
flipped = ( position / this.model.revisions.length ) > 0.5;
|
||
if ( isRtl ) {
|
||
direction = flipped ? 'left' : 'right';
|
||
directionVal = flipped ? 'leftPlusWidth' : direction;
|
||
} else {
|
||
direction = flipped ? 'right' : 'left';
|
||
directionVal = flipped ? 'rightPlusWidth' : direction;
|
||
}
|
||
otherDirection = 'right' === direction ? 'left': 'right';
|
||
wp.Backbone.View.prototype.render.apply( this, arguments );
|
||
css[direction] = this.model.get('offset')[directionVal] + 'px';
|
||
css[otherDirection] = '';
|
||
this.$el.toggleClass( 'flipped', flipped ).css( css );
|
||
},
|
||
|
||
visible: function() {
|
||
return this.model.get( 'scrubbing' ) || this.model.get( 'hovering' );
|
||
},
|
||
|
||
toggleVisibility: function() {
|
||
if ( this.visible() ) {
|
||
this.$el.stop().show().fadeTo( 100 - this.el.style.opacity * 100, 1 );
|
||
} else {
|
||
this.$el.stop().fadeTo( this.el.style.opacity * 300, 0, function(){ $(this).hide(); } );
|
||
}
|
||
return;
|
||
}
|
||
});
|
||
|
||
// The buttons view.
|
||
// Encapsulates all of the configuration for the previous/next buttons.
|
||
revisions.view.Buttons = wp.Backbone.View.extend({
|
||
className: 'revisions-buttons',
|
||
template: wp.template('revisions-buttons'),
|
||
|
||
events: {
|
||
'click .revisions-next .button': 'nextRevision',
|
||
'click .revisions-previous .button': 'previousRevision'
|
||
},
|
||
|
||
initialize: function() {
|
||
this.listenTo( this.model, 'update:revisions', this.disabledButtonCheck );
|
||
},
|
||
|
||
ready: function() {
|
||
this.disabledButtonCheck();
|
||
},
|
||
|
||
// Go to a specific model index
|
||
gotoModel: function( toIndex ) {
|
||
var attributes = {
|
||
to: this.model.revisions.at( toIndex )
|
||
};
|
||
// If we're at the first revision, unset 'from'.
|
||
if ( toIndex ) {
|
||
attributes.from = this.model.revisions.at( toIndex - 1 );
|
||
} else {
|
||
this.model.unset('from', { silent: true });
|
||
}
|
||
|
||
this.model.set( attributes );
|
||
},
|
||
|
||
// Go to the 'next' revision
|
||
nextRevision: function() {
|
||
var toIndex = this.model.revisions.indexOf( this.model.get('to') ) + 1;
|
||
this.gotoModel( toIndex );
|
||
},
|
||
|
||
// Go to the 'previous' revision
|
||
previousRevision: function() {
|
||
var toIndex = this.model.revisions.indexOf( this.model.get('to') ) - 1;
|
||
this.gotoModel( toIndex );
|
||
},
|
||
|
||
// Check to see if the Previous or Next buttons need to be disabled or enabled.
|
||
disabledButtonCheck: function() {
|
||
var maxVal = this.model.revisions.length - 1,
|
||
minVal = 0,
|
||
next = $('.revisions-next .button'),
|
||
previous = $('.revisions-previous .button'),
|
||
val = this.model.revisions.indexOf( this.model.get('to') );
|
||
|
||
// Disable "Next" button if you're on the last node.
|
||
next.prop( 'disabled', ( maxVal === val ) );
|
||
|
||
// Disable "Previous" button if you're on the first node.
|
||
previous.prop( 'disabled', ( minVal === val ) );
|
||
}
|
||
});
|
||
|
||
|
||
// The slider view.
|
||
revisions.view.Slider = wp.Backbone.View.extend({
|
||
className: 'wp-slider',
|
||
direction: isRtl ? 'right' : 'left',
|
||
|
||
events: {
|
||
'mousemove' : 'mouseMove'
|
||
},
|
||
|
||
initialize: function() {
|
||
_.bindAll( this, 'start', 'slide', 'stop', 'mouseMove', 'mouseEnter', 'mouseLeave' );
|
||
this.listenTo( this.model, 'update:slider', this.applySliderSettings );
|
||
},
|
||
|
||
ready: function() {
|
||
this.$el.css('width', ( this.model.revisions.length * 50 ) + 'px');
|
||
this.$el.slider( _.extend( this.model.toJSON(), {
|
||
start: this.start,
|
||
slide: this.slide,
|
||
stop: this.stop
|
||
}) );
|
||
|
||
this.$el.hoverIntent({
|
||
over: this.mouseEnter,
|
||
out: this.mouseLeave,
|
||
timeout: 800
|
||
});
|
||
|
||
this.applySliderSettings();
|
||
},
|
||
|
||
mouseMove: function( e ) {
|
||
var zoneCount = this.model.revisions.length - 1, // One fewer zone than models
|
||
sliderFrom = this.$el.allOffsets()[this.direction], // "From" edge of slider
|
||
sliderWidth = this.$el.width(), // Width of slider
|
||
tickWidth = sliderWidth / zoneCount, // Calculated width of zone
|
||
actualX = ( isRtl ? $(window).width() - e.pageX : e.pageX ) - sliderFrom, // Flipped for RTL - sliderFrom;
|
||
currentModelIndex = Math.floor( ( actualX + ( tickWidth / 2 ) ) / tickWidth ); // Calculate the model index
|
||
|
||
// Ensure sane value for currentModelIndex.
|
||
if ( currentModelIndex < 0 ) {
|
||
currentModelIndex = 0;
|
||
} else if ( currentModelIndex >= this.model.revisions.length ) {
|
||
currentModelIndex = this.model.revisions.length - 1;
|
||
}
|
||
|
||
// Update the tooltip mode
|
||
this.model.set({ hoveredRevision: this.model.revisions.at( currentModelIndex ) });
|
||
},
|
||
|
||
mouseLeave: function() {
|
||
this.model.set({ hovering: false });
|
||
},
|
||
|
||
mouseEnter: function() {
|
||
this.model.set({ hovering: true });
|
||
},
|
||
|
||
applySliderSettings: function() {
|
||
this.$el.slider( _.pick( this.model.toJSON(), 'value', 'values', 'range' ) );
|
||
var handles = this.$('a.ui-slider-handle');
|
||
|
||
if ( this.model.get('compareTwoMode') ) {
|
||
// in RTL mode the 'left handle' is the second in the slider, 'right' is first
|
||
handles.first()
|
||
.toggleClass( 'to-handle', !! isRtl )
|
||
.toggleClass( 'from-handle', ! isRtl );
|
||
handles.last()
|
||
.toggleClass( 'from-handle', !! isRtl )
|
||
.toggleClass( 'to-handle', ! isRtl );
|
||
} else {
|
||
handles.removeClass('from-handle to-handle');
|
||
}
|
||
},
|
||
|
||
start: function( event, ui ) {
|
||
this.model.set({ scrubbing: true });
|
||
|
||
// Track the mouse position to enable smooth dragging,
|
||
// overrides default jQuery UI step behavior.
|
||
$( window ).on( 'mousemove.wp.revisions', { view: this }, function( e ) {
|
||
var handles,
|
||
view = e.data.view,
|
||
leftDragBoundary = view.$el.offset().left,
|
||
sliderOffset = leftDragBoundary,
|
||
sliderRightEdge = leftDragBoundary + view.$el.width(),
|
||
rightDragBoundary = sliderRightEdge,
|
||
leftDragReset = '0',
|
||
rightDragReset = '100%',
|
||
handle = $( ui.handle );
|
||
|
||
// In two handle mode, ensure handles can't be dragged past each other.
|
||
// Adjust left/right boundaries and reset points.
|
||
if ( view.model.get('compareTwoMode') ) {
|
||
handles = handle.parent().find('.ui-slider-handle');
|
||
if ( handle.is( handles.first() ) ) { // We're the left handle
|
||
rightDragBoundary = handles.last().offset().left;
|
||
rightDragReset = rightDragBoundary - sliderOffset;
|
||
} else { // We're the right handle
|
||
leftDragBoundary = handles.first().offset().left + handles.first().width();
|
||
leftDragReset = leftDragBoundary - sliderOffset;
|
||
}
|
||
}
|
||
|
||
// Follow mouse movements, as long as handle remains inside slider.
|
||
if ( e.pageX < leftDragBoundary ) {
|
||
handle.css( 'left', leftDragReset ); // Mouse to left of slider.
|
||
} else if ( e.pageX > rightDragBoundary ) {
|
||
handle.css( 'left', rightDragReset ); // Mouse to right of slider.
|
||
} else {
|
||
handle.css( 'left', e.pageX - sliderOffset ); // Mouse in slider.
|
||
}
|
||
} );
|
||
},
|
||
|
||
getPosition: function( position ) {
|
||
return isRtl ? this.model.revisions.length - position - 1: position;
|
||
},
|
||
|
||
// Responds to slide events
|
||
slide: function( event, ui ) {
|
||
var attributes, movedRevision;
|
||
// Compare two revisions mode
|
||
if ( this.model.get('compareTwoMode') ) {
|
||
// Prevent sliders from occupying same spot
|
||
if ( ui.values[1] === ui.values[0] ) {
|
||
return false;
|
||
}
|
||
if ( isRtl ) {
|
||
ui.values.reverse();
|
||
}
|
||
attributes = {
|
||
from: this.model.revisions.at( this.getPosition( ui.values[0] ) ),
|
||
to: this.model.revisions.at( this.getPosition( ui.values[1] ) )
|
||
};
|
||
} else {
|
||
attributes = {
|
||
to: this.model.revisions.at( this.getPosition( ui.value ) )
|
||
};
|
||
// If we're at the first revision, unset 'from'.
|
||
if ( this.getPosition( ui.value ) > 0 ) {
|
||
attributes.from = this.model.revisions.at( this.getPosition( ui.value ) - 1 );
|
||
} else {
|
||
attributes.from = undefined;
|
||
}
|
||
}
|
||
movedRevision = this.model.revisions.at( this.getPosition( ui.value ) );
|
||
|
||
// If we are scrubbing, a scrub to a revision is considered a hover
|
||
if ( this.model.get('scrubbing') ) {
|
||
attributes.hoveredRevision = movedRevision;
|
||
}
|
||
|
||
this.model.set( attributes );
|
||
},
|
||
|
||
stop: function() {
|
||
$( window ).off('mousemove.wp.revisions');
|
||
this.model.updateSliderSettings(); // To snap us back to a tick mark
|
||
this.model.set({ scrubbing: false });
|
||
}
|
||
});
|
||
|
||
// The diff view.
|
||
// This is the view for the current active diff.
|
||
revisions.view.Diff = wp.Backbone.View.extend({
|
||
className: 'revisions-diff',
|
||
template: wp.template('revisions-diff'),
|
||
|
||
// Generate the options to be passed to the template.
|
||
prepare: function() {
|
||
return _.extend({ fields: this.model.fields.toJSON() }, this.options );
|
||
}
|
||
});
|
||
|
||
// The revisions router.
|
||
// Maintains the URL routes so browser URL matches state.
|
||
revisions.Router = Backbone.Router.extend({
|
||
initialize: function( options ) {
|
||
this.model = options.model;
|
||
|
||
// Maintain state and history when navigating
|
||
this.listenTo( this.model, 'update:diff', _.debounce( this.updateUrl, 250 ) );
|
||
this.listenTo( this.model, 'change:compareTwoMode', this.updateUrl );
|
||
},
|
||
|
||
baseUrl: function( url ) {
|
||
return this.model.get('baseUrl') + url;
|
||
},
|
||
|
||
updateUrl: function() {
|
||
var from = this.model.has('from') ? this.model.get('from').id : 0,
|
||
to = this.model.get('to').id;
|
||
if ( this.model.get('compareTwoMode' ) ) {
|
||
this.navigate( this.baseUrl( '?from=' + from + '&to=' + to ), { replace: true } );
|
||
} else {
|
||
this.navigate( this.baseUrl( '?revision=' + to ), { replace: true } );
|
||
}
|
||
},
|
||
|
||
handleRoute: function( a, b ) {
|
||
var compareTwo = _.isUndefined( b );
|
||
|
||
if ( ! compareTwo ) {
|
||
b = this.model.revisions.get( a );
|
||
a = this.model.revisions.prev( b );
|
||
b = b ? b.id : 0;
|
||
a = a ? a.id : 0;
|
||
}
|
||
}
|
||
});
|
||
|
||
/**
|
||
* Initialize the revisions UI for revision.php.
|
||
*/
|
||
revisions.init = function() {
|
||
var state;
|
||
|
||
// Bail if the current page is not revision.php.
|
||
if ( ! window.adminpage || 'revision-php' !== window.adminpage ) {
|
||
return;
|
||
}
|
||
|
||
state = new revisions.model.FrameState({
|
||
initialDiffState: {
|
||
// wp_localize_script doesn't stringifies ints, so cast them.
|
||
to: parseInt( revisions.settings.to, 10 ),
|
||
from: parseInt( revisions.settings.from, 10 ),
|
||
// wp_localize_script does not allow for top-level booleans so do a comparator here.
|
||
compareTwoMode: ( revisions.settings.compareTwoMode === '1' )
|
||
},
|
||
diffData: revisions.settings.diffData,
|
||
baseUrl: revisions.settings.baseUrl,
|
||
postId: parseInt( revisions.settings.postId, 10 )
|
||
}, {
|
||
revisions: new revisions.model.Revisions( revisions.settings.revisionData )
|
||
});
|
||
|
||
revisions.view.frame = new revisions.view.Frame({
|
||
model: state
|
||
}).render();
|
||
};
|
||
|
||
$( revisions.init );
|
||
}(jQuery));
|