Mini Shell

/**
 * @file Revisions interface functions, Backbone classes and
 * the revisions.php document.ready bootstrap.
 *
 * @output wp-admin/js/revisions.js
 */

/* global isRtl */

window.wp = window.wp || {};

(function($) {
	var revisions;
	/**
	 * Expose the module in window.wp.revisions.
	 */
	revisions = wp.revisions = { model: {}, view: {}, controller: {} };

	// Link post revisions data served from the back end.
	revisions.settings = window._wpRevisionsSettings || {};

	// For debugging.
	revisions.debug = false;

	/**
	 * wp.revisions.log
	 *
	 * A debugging utility for revisions. Works only when a
	 * debug flag is on and the browser supports it.
	 */
	revisions.log = function() {
		if ( window.console && revisions.debug ) {
			window.console.log.apply( window.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()
		});
	};

	/**
	 * ========================================================================
	 * 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.on( 'change:from', this.handleLocalChanges );
			this.on( 'change:to', this.handleLocalChanges );
			this.on( 'change:compareTwoMode', this.updateSliderSettings );
			this.on( 'update:revisions', this.updateSliderSettings );

			// Listen for changes to the hovered revision.
			this.on( '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({});

	/**
	 * wp.revisions.model.Revisions
	 *
	 * A collection of post revisions.
	 */
	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() {
			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.postId = options.postId;
			this.requests  = {};
		},

		model: revisions.model.Diff,

		ensure: function( id, context ) {
			var diff     = this.get( id ),
				request  = this.requests[ id ],
				deferred = $.Deferred(),
				ids      = {},
				from     = id.split(':')[0],
				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: this.postId
				});

				var deferred = wp.ajax.send( options ),
					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 );
			}
		}
	});


	/**
	 * wp.revisions.model.FrameState
	 *
	 * The frame state.
	 *
	 * @see wp.revisions.view.Frame
	 *
	 * @param {object}                    attributes        Model attributes - none are required.
	 * @param {object}                    options           Options for the model.
	 * @param {revisions.model.Revisions} options.revisions A collection of revisions.
	 */
	revisions.model.FrameState = Backbone.Model.extend({
		defaults: {
			loading: false,
			error: false,
			compareTwoMode: false
		},

		initialize: function( attributes, options ) {
			var state = this.get( 'initialDiffState' );
			_.bindAll( this, 'receiveDiff' );
			this._debouncedEnsureDiff = _.debounce( this._ensureDiff, 200 );

			this.revisions = options.revisions;

			this.diffs = new revisions.model.Diffs( [], {
				revisions: this.revisions,
				postId: this.get( 'postId' )
			} );

			// Set the initial diffs collection.
			this.diffs.set( this.get( '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 attributes.

			this.set( {
				to : this.revisions.get( state.to ),
				from : this.revisions.get( state.from ),
				compareTwoMode : state.compareTwoMode
			} );

			// Start the router if browser supports History API.
			if ( window.history && window.history.pushState ) {
				this.router = new revisions.Router({ model: this });
				if ( Backbone.History.started ) {
					Backbone.history.stop();
				}
				Backbone.history.start({ pushState: true });
			}
		},

		updateLoadingStatus: function() {
			this.set( 'error', false );
			this.set( 'loading', ! this.diff() );
		},

		changeMode: function( model, value ) {
			var toIndex = this.revisions.indexOf( this.get( 'to' ) );

			// If we were on the first revision before switching to two-handled mode,
			// bump the 'to' position over one.
			if ( value && 0 === toIndex ) {
				this.set({
					from: this.revisions.at( toIndex ),
					to:   this.revisions.at( toIndex + 1 )
				});
			}

			// When switching back to single-handled mode, reset 'from' model to
			// one position before the 'to' model.
			if ( ! value && 0 !== toIndex ) { // '! value' means switching to single-handled mode.
				this.set({
					from: this.revisions.at( toIndex - 1 ),
					to:   this.revisions.at( toIndex )
				});
			}
		},

		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() {
			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));

How To Spot A Pretend Designer Handbag, According To Professional Authenticators\n<\/p>\n

Also fake bags<\/em><\/strong><\/a>, the stamping on these luggage is often off \u2013 both too deep or too shallow and blurry.The worst cases even have spelling mistakes or errors in font and capitalization. Even better, these techniques could be utilized to virtually all LV luggage, not just particular fashions. We provide safe cost choices like PayPal, ensuring that your transactions are all the time protected when you enjoy a seamless shopping expertise. Fast and secure supply to prospects in over a hundred international locations worldwide. Some of the bags in the movies are way too wide on the bottom fake bags<\/em><\/strong><\/a> Replica Handbags<\/em><\/strong><\/a>, and some are too slim. Karen is a freelance author with more than 25 years of experience writing for an array of publications, including authoring several books.\n<\/p>\n

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Compare the reproduction’s logo and model markings to pictures of genuine Hermes bags to identify any discrepancies. A well-made replica ought to strive to copy these parts precisely, reflecting the original bag’s design and model identity. By rigorously evaluating the brand markings and logo of a duplicate Hermes bag, you’ll be able to determine its high quality and authenticity.\n<\/p>\n

They also have a dropshipping program, the place you should buy only one product at a time but at wholesale costs. They can merely visit the manufacturing facility and get the identical high-quality raw materials used in authentic bags, similar to leather-based for Louis Viton and Channel. With developments in technology, replicas are trending in 2024 that look so unique that an untrained person cannot differentiate. Skilled craftsmanship has now made it attainable for individuals to feel luxury with out spending a fortune.\n<\/p>\n

They even have tons of choices between used and unused bags that may assist you to complete your on a regular basis or formal looks with ease. Before buying any replica, evaluate it with clear photographs of the real bag from official websites or trusted resellers. Pay shut attention to details like brand placement, stitching type Replica Handbags<\/em><\/strong><\/a>, pocket shapes replica bags<\/em><\/strong><\/a> replica birkin bags<\/em><\/strong><\/a>, and even the colour of the lining. A good replica should match the actual factor in almost every way.\n<\/p>\n

Replica bags have turn out to be a well-liked selection for individuals who love luxurious style however wish to get monetary savings with out sacrificing fashion. At their core, faux Louis Vuitton  purses are designer-inspired bags that aim to imitate the look and feel of the unique luxurious baggage. These handbags are typically made using synthetic or lower-quality supplies that resemble the actual factor, but they’re offered at a significantly cheaper price.\n<\/p>\n

This duplicate Chlo\u00e9 Faye Backpack is well constructed, pinning down even the smallest details of its authentic counterpart. In addition to the lovely mixture of velvety suede and supple leather-based, the bag features hand-painted raw edges alongside the flap, and facet zippers. The inside of the bag is suede as properly nevertheless it is a lighter suede (almost beige-ish), and is genuine suede leather-based like the unique. The Chlo\u00e9 Faye was a sort of uncommon bags that I fell in love with upon first sight.<\/p>\n","protected":false},"excerpt":{"rendered":"

How To Spot A Pretend Designer Handbag, According To Professional Authenticators Also fake bags, the stamping on these luggage is often off \u2013 both too deep or too shallow and blurry.The worst cases even have spelling mistakes or errors in font and capitalization. Even better, these techniques could be utilized to virtually all LV luggage,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts\/14129"}],"collection":[{"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/comments?post=14129"}],"version-history":[{"count":1,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts\/14129\/revisions"}],"predecessor-version":[{"id":14130,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts\/14129\/revisions\/14130"}],"wp:attachment":[{"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/media?parent=14129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/categories?post=14129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/tags?post=14129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}