--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/js/revisions.js Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,1080 @@
+window.wp = window.wp || {};
+
+(function($) {
+ var revisions;
+
+ revisions = wp.revisions = { model: {}, view: {}, controller: {} };
+
+ // Link settings.
+ revisions.settings = _.isUndefined( _wpRevisionsSettings ) ? {} : _wpRevisionsSettings;
+
+ // For debugging
+ revisions.debug = false;
+
+ revisions.log = function() {
+ if ( window.console && revisions.debug )
+ console.log.apply( console, arguments );
+ };
+
+ // Handy functions to help with positioning
+ $.fn.allOffsets = function() {
+ var offset = this.offset() || {top: 0, left: 0}, win = $(window);
+ return _.extend( offset, {
+ right: win.width() - offset.left - this.outerWidth(),
+ bottom: win.height() - offset.top - this.outerHeight()
+ });
+ };
+
+ $.fn.allPositions = function() {
+ var position = this.position() || {top: 0, left: 0}, parent = this.parent();
+ return _.extend( position, {
+ right: parent.outerWidth() - position.left - this.outerWidth(),
+ bottom: parent.outerHeight() - position.top - this.outerHeight()
+ });
+ };
+
+ // wp_localize_script transforms top-level numbers into strings. Undo that.
+ if ( revisions.settings.to )
+ revisions.settings.to = parseInt( revisions.settings.to, 10 );
+ if ( revisions.settings.from )
+ revisions.settings.from = parseInt( revisions.settings.from, 10 );
+
+ // wp_localize_script does not allow for top-level booleans. Fix that.
+ if ( revisions.settings.compareTwoMode )
+ revisions.settings.compareTwoMode = revisions.settings.compareTwoMode === '1';
+
+ /**
+ * ========================================================================
+ * MODELS
+ * ========================================================================
+ */
+ revisions.model.Slider = Backbone.Model.extend({
+ defaults: {
+ value: null,
+ values: null,
+ min: 0,
+ max: 1,
+ step: 1,
+ range: false,
+ compareTwoMode: false
+ },
+
+ initialize: function( options ) {
+ this.frame = options.frame;
+ this.revisions = options.revisions;
+
+ // Listen for changes to the revisions or mode from outside
+ this.listenTo( this.frame, 'update:revisions', this.receiveRevisions );
+ this.listenTo( this.frame, 'change:compareTwoMode', this.updateMode );
+
+ // Listen for internal changes
+ this.listenTo( this, 'change:from', this.handleLocalChanges );
+ this.listenTo( this, 'change:to', this.handleLocalChanges );
+ this.listenTo( this, 'change:compareTwoMode', this.updateSliderSettings );
+ this.listenTo( this, 'update:revisions', this.updateSliderSettings );
+
+ // Listen for changes to the hovered revision
+ this.listenTo( this, 'change:hoveredRevision', this.hoverRevision );
+
+ this.set({
+ max: this.revisions.length - 1,
+ compareTwoMode: this.frame.get('compareTwoMode'),
+ from: this.frame.get('from'),
+ to: this.frame.get('to')
+ });
+ this.updateSliderSettings();
+ },
+
+ getSliderValue: function( a, b ) {
+ return isRtl ? this.revisions.length - this.revisions.indexOf( this.get(a) ) - 1 : this.revisions.indexOf( this.get(b) );
+ },
+
+ updateSliderSettings: function() {
+ if ( this.get('compareTwoMode') ) {
+ this.set({
+ values: [
+ this.getSliderValue( 'to', 'from' ),
+ this.getSliderValue( 'from', 'to' )
+ ],
+ value: null,
+ range: true // ensures handles cannot cross
+ });
+ } else {
+ this.set({
+ value: this.getSliderValue( 'to', 'to' ),
+ values: null,
+ range: false
+ });
+ }
+ this.trigger( 'update:slider' );
+ },
+
+ // Called when a revision is hovered
+ hoverRevision: function( model, value ) {
+ this.trigger( 'hovered:revision', value );
+ },
+
+ // Called when `compareTwoMode` changes
+ updateMode: function( model, value ) {
+ this.set({ compareTwoMode: value });
+ },
+
+ // Called when `from` or `to` changes in the local model
+ handleLocalChanges: function() {
+ this.frame.set({
+ from: this.get('from'),
+ to: this.get('to')
+ });
+ },
+
+ // Receives revisions changes from outside the model
+ receiveRevisions: function( from, to ) {
+ // Bail if nothing changed
+ if ( this.get('from') === from && this.get('to') === to )
+ return;
+
+ this.set({ from: from, to: to }, { silent: true });
+ this.trigger( 'update:revisions', from, to );
+ }
+
+ });
+
+ revisions.model.Tooltip = Backbone.Model.extend({
+ defaults: {
+ revision: null,
+ offset: {},
+ hovering: false, // Whether the mouse is hovering
+ scrubbing: false // Whether the mouse is scrubbing
+ },
+
+ initialize: function( options ) {
+ this.frame = options.frame;
+ this.revisions = options.revisions;
+ this.slider = options.slider;
+
+ this.listenTo( this.slider, 'hovered:revision', this.updateRevision );
+ this.listenTo( this.slider, 'change:hovering', this.setHovering );
+ this.listenTo( this.slider, 'change:scrubbing', this.setScrubbing );
+ },
+
+
+ updateRevision: function( revision ) {
+ this.set({ revision: revision });
+ },
+
+ setHovering: function( model, value ) {
+ this.set({ hovering: value });
+ },
+
+ setScrubbing: function( model, value ) {
+ this.set({ scrubbing: value });
+ }
+ });
+
+ revisions.model.Revision = Backbone.Model.extend({});
+
+ revisions.model.Revisions = Backbone.Collection.extend({
+ model: revisions.model.Revision,
+
+ initialize: function() {
+ _.bindAll( this, 'next', 'prev' );
+ },
+
+ next: function( revision ) {
+ var index = this.indexOf( revision );
+
+ if ( index !== -1 && index !== this.length - 1 )
+ return this.at( index + 1 );
+ },
+
+ prev: function( revision ) {
+ var index = this.indexOf( revision );
+
+ if ( index !== -1 && index !== 0 )
+ return this.at( index - 1 );
+ }
+ });
+
+ revisions.model.Field = Backbone.Model.extend({});
+
+ revisions.model.Fields = Backbone.Collection.extend({
+ model: revisions.model.Field
+ });
+
+ revisions.model.Diff = Backbone.Model.extend({
+ initialize: function( attributes, options ) {
+ var fields = this.get('fields');
+ this.unset('fields');
+
+ this.fields = new revisions.model.Fields( fields );
+ }
+ });
+
+ revisions.model.Diffs = Backbone.Collection.extend({
+ initialize: function( models, options ) {
+ _.bindAll( this, 'getClosestUnloaded' );
+ this.loadAll = _.once( this._loadAll );
+ this.revisions = options.revisions;
+ this.requests = {};
+ },
+
+ model: revisions.model.Diff,
+
+ ensure: function( id, context ) {
+ var diff = this.get( id );
+ var request = this.requests[ id ];
+ var deferred = $.Deferred();
+ var ids = {};
+ var from = id.split(':')[0];
+ var to = id.split(':')[1];
+ ids[id] = true;
+
+ wp.revisions.log( 'ensure', id );
+
+ this.trigger( 'ensure', ids, from, to, deferred.promise() );
+
+ if ( diff ) {
+ deferred.resolveWith( context, [ diff ] );
+ } else {
+ this.trigger( 'ensure:load', ids, from, to, deferred.promise() );
+ _.each( ids, _.bind( function( id ) {
+ // Remove anything that has an ongoing request
+ if ( this.requests[ id ] )
+ delete ids[ id ];
+ // Remove anything we already have
+ if ( this.get( id ) )
+ delete ids[ id ];
+ }, this ) );
+ if ( ! request ) {
+ // Always include the ID that started this ensure
+ ids[ id ] = true;
+ request = this.load( _.keys( ids ) );
+ }
+
+ request.done( _.bind( function() {
+ deferred.resolveWith( context, [ this.get( id ) ] );
+ }, this ) ).fail( _.bind( function() {
+ deferred.reject();
+ }) );
+ }
+
+ return deferred.promise();
+ },
+
+ // Returns an array of proximal diffs
+ getClosestUnloaded: function( ids, centerId ) {
+ var self = this;
+ return _.chain([0].concat( ids )).initial().zip( ids ).sortBy( function( pair ) {
+ return Math.abs( centerId - pair[1] );
+ }).map( function( pair ) {
+ return pair.join(':');
+ }).filter( function( diffId ) {
+ return _.isUndefined( self.get( diffId ) ) && ! self.requests[ diffId ];
+ }).value();
+ },
+
+ _loadAll: function( allRevisionIds, centerId, num ) {
+ var self = this, deferred = $.Deferred();
+ diffs = _.first( this.getClosestUnloaded( allRevisionIds, centerId ), num );
+ if ( _.size( diffs ) > 0 ) {
+ this.load( diffs ).done( function() {
+ self._loadAll( allRevisionIds, centerId, num ).done( function() {
+ deferred.resolve();
+ });
+ }).fail( function() {
+ if ( 1 === num ) { // Already tried 1. This just isn't working. Give up.
+ deferred.reject();
+ } else { // Request fewer diffs this time
+ self._loadAll( allRevisionIds, centerId, Math.ceil( num / 2 ) ).done( function() {
+ deferred.resolve();
+ });
+ }
+ });
+ } else {
+ deferred.resolve();
+ }
+ return deferred;
+ },
+
+ load: function( comparisons ) {
+ wp.revisions.log( 'load', comparisons );
+ // Our collection should only ever grow, never shrink, so remove: false
+ return this.fetch({ data: { compare: comparisons }, remove: false }).done( function(){
+ wp.revisions.log( 'load:complete', comparisons );
+ });
+ },
+
+ sync: function( method, model, options ) {
+ if ( 'read' === method ) {
+ options = options || {};
+ options.context = this;
+ options.data = _.extend( options.data || {}, {
+ action: 'get-revision-diffs',
+ post_id: revisions.settings.postId
+ });
+
+ var deferred = wp.ajax.send( options );
+ var requests = this.requests;
+
+ // Record that we're requesting each diff.
+ if ( options.data.compare ) {
+ _.each( options.data.compare, function( id ) {
+ requests[ id ] = deferred;
+ });
+ }
+
+ // When the request completes, clear the stored request.
+ deferred.always( function() {
+ if ( options.data.compare ) {
+ _.each( options.data.compare, function( id ) {
+ delete requests[ id ];
+ });
+ }
+ });
+
+ return deferred;
+
+ // Otherwise, fall back to `Backbone.sync()`.
+ } else {
+ return Backbone.Model.prototype.sync.apply( this, arguments );
+ }
+ }
+ });
+
+
+ revisions.model.FrameState = Backbone.Model.extend({
+ defaults: {
+ loading: false,
+ error: false,
+ compareTwoMode: false
+ },
+
+ initialize: function( attributes, options ) {
+ var properties = {};
+
+ _.bindAll( this, 'receiveDiff' );
+ this._debouncedEnsureDiff = _.debounce( this._ensureDiff, 200 );
+
+ this.revisions = options.revisions;
+ this.diffs = new revisions.model.Diffs( [], { revisions: this.revisions });
+
+ // Set the initial diffs collection provided through the settings
+ this.diffs.set( revisions.settings.diffData );
+
+ // Set up internal listeners
+ this.listenTo( this, 'change:from', this.changeRevisionHandler );
+ this.listenTo( this, 'change:to', this.changeRevisionHandler );
+ this.listenTo( this, 'change:compareTwoMode', this.changeMode );
+ this.listenTo( this, 'update:revisions', this.updatedRevisions );
+ this.listenTo( this.diffs, 'ensure:load', this.updateLoadingStatus );
+ this.listenTo( this, 'update:diff', this.updateLoadingStatus );
+
+ // Set the initial revisions, baseUrl, and mode as provided through settings
+ properties.to = this.revisions.get( revisions.settings.to );
+ properties.from = this.revisions.get( revisions.settings.from );
+ properties.compareTwoMode = revisions.settings.compareTwoMode;
+ properties.baseUrl = revisions.settings.baseUrl;
+ this.set( properties );
+
+ // Start the router if browser supports History API
+ if ( window.history && window.history.pushState ) {
+ this.router = new revisions.Router({ model: this });
+ Backbone.history.start({ pushState: true });
+ }
+ },
+
+ updateLoadingStatus: function() {
+ this.set( 'error', false );
+ this.set( 'loading', ! this.diff() );
+ },
+
+ changeMode: function( model, value ) {
+ // If we were on the first revision before switching, we have to bump them over one
+ if ( value && 0 === this.revisions.indexOf( this.get('to') ) ) {
+ this.set({
+ from: this.revisions.at(0),
+ to: this.revisions.at(1)
+ });
+ }
+ },
+
+ updatedRevisions: function( from, to ) {
+ if ( this.get( 'compareTwoMode' ) ) {
+ // TODO: compare-two loading strategy
+ } else {
+ this.diffs.loadAll( this.revisions.pluck('id'), to.id, 40 );
+ }
+ },
+
+ // Fetch the currently loaded diff.
+ diff: function() {
+ 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 ) {
+ var from, to, diffId, diff;
+
+ 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( model, value, options ) {
+ 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
+ * ========================================================================
+ */
+
+ // The frame view. This contains the entire page.
+ 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') );
+ }
+ });
+
+ // The control view.
+ // This 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
+ var 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 = $(window);
+ this.window.on( 'scroll.wp.revisions', {controls: this}, function(e) {
+ var controls = e.data.controls;
+ var container = controls.$el.parent();
+ var scrolled = controls.window.scrollTop();
+ var 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( event ) {
+ // Activate compare two mode?
+ this.model.set({ compareTwoMode: $('.compare-two-revisions').prop('checked') });
+ }
+ });
+
+ // The tooltip view.
+ // Encapsulates the tooltip.
+ revisions.view.Tooltip = wp.Backbone.View.extend({
+ className: 'revisions-tooltip',
+ template: wp.template('revisions-meta'),
+
+ initialize: function( options ) {
+ this.listenTo( this.model, 'change:offset', this.render );
+ this.listenTo( this.model, 'change:hovering', this.toggleVisibility );
+ this.listenTo( this.model, 'change:scrubbing', this.toggleVisibility );
+ },
+
+ prepare: function() {
+ if ( _.isNull( this.model.get('revision') ) )
+ return;
+ else
+ return _.extend( { type: 'tooltip' }, {
+ attributes: this.model.get('revision').toJSON()
+ });
+ },
+
+ render: function() {
+ var direction, directionVal, flipped, css = {}, position = this.model.revisions.indexOf( this.model.get('revision') ) + 1;
+ flipped = ( position / this.model.revisions.length ) > 0.5;
+ if ( isRtl ) {
+ direction = flipped ? 'left' : 'right';
+ directionVal = flipped ? 'leftPlusWidth' : direction;
+ } else {
+ direction = flipped ? 'right' : 'left';
+ directionVal = flipped ? 'rightPlusWidth' : direction;
+ }
+ otherDirection = 'right' === direction ? 'left': 'right';
+ wp.Backbone.View.prototype.render.apply( this, arguments );
+ css[direction] = this.model.get('offset')[directionVal] + 'px';
+ css[otherDirection] = '';
+ this.$el.toggleClass( 'flipped', flipped ).css( css );
+ },
+
+ visible: function() {
+ return this.model.get( 'scrubbing' ) || this.model.get( 'hovering' );
+ },
+
+ toggleVisibility: function( options ) {
+ 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? $(window).width() - e.pageX : e.pageX; // Flipped for RTL - sliderFrom;
+ actualX = actualX - sliderFrom; // Offset of mouse position in slider
+ var currentModelIndex = Math.floor( ( actualX + ( tickWidth / 2 ) ) / tickWidth ); // Calculate the model index
+
+ // Ensure sane value for currentModelIndex.
+ if ( currentModelIndex < 0 )
+ currentModelIndex = 0;
+ else if ( currentModelIndex >= this.model.revisions.length )
+ currentModelIndex = this.model.revisions.length - 1;
+
+ // Update the tooltip mode
+ this.model.set({ hoveredRevision: this.model.revisions.at( currentModelIndex ) });
+ },
+
+ mouseLeave: function() {
+ this.model.set({ hovering: false });
+ },
+
+ mouseEnter: function() {
+ this.model.set({ hovering: true });
+ },
+
+ applySliderSettings: function() {
+ this.$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.
+ $( window ).on( 'mousemove.wp.revisions', { view: this }, function( e ) {
+ var view = e.data.view,
+ leftDragBoundary = view.$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') ) {
+ var 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( event, ui ) {
+ $( 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
+ // takes URLs with #hash fragments and routes them
+ revisions.Router = Backbone.Router.extend({
+ initialize: function( options ) {
+ this.model = options.model;
+ this.routes = _.object([
+ [ this.baseUrl( '?from=:from&to=:to' ), 'handleRoute' ],
+ [ this.baseUrl( '?from=:from&to=:to' ), 'handleRoute' ]
+ ]);
+ // 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;
+ var to = this.model.get('to').id;
+ if ( this.model.get('compareTwoMode' ) )
+ this.navigate( this.baseUrl( '?from=' + from + '&to=' + to ) );
+ else
+ this.navigate( this.baseUrl( '?revision=' + to ) );
+ },
+
+ handleRoute: function( a, b ) {
+ var from, to, 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;
+ }
+
+ this.model.set({
+ from: this.model.revisions.get( parseInt( a, 10 ) ),
+ to: this.model.revisions.get( parseInt( a, 10 ) ),
+ compareTwoMode: compareTwo
+ });
+ }
+ });
+
+ // Initialize the revisions UI.
+ revisions.init = function() {
+ revisions.view.frame = new revisions.view.Frame({
+ model: new revisions.model.FrameState({}, {
+ revisions: new revisions.model.Revisions( revisions.settings.revisionData )
+ })
+ }).render();
+ };
+
+ $( revisions.init );
+}(jQuery));