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));

21 Finest Duplicate Luggage Worth Shopping For 2024 Review\n<\/p>\n

These replicas are usually costlier because of the greater high quality requirements they adhere to. AA-grade replicas are slightly lower in high quality however still keep a high commonplace of element and materials. They may have minor deviations from the original however are generally well-crafted and sturdy.\n<\/p>\n

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Always compare with real brand pictures to identify small differences. For example a mid-quality Louis Vuitton Neverfull replica bag will probably have plastic trimmings instead of trimmings made with genuine cowhide leather like authentic Louis Vuitton’s. Mid-quality replicas normally don’t hold up well with common use. These bags use barely higher materials than low-quality replicas and often have a extra accurate design compared to low-quality replicas.\n<\/p>\n

The grade of a duplicate bag is normally decided by numerous components including the fabric used, the quality of hardware, the production process, and the source of materials. Regrettably Replica Handbags<\/em><\/strong><\/a>, there is no uniform normal for classifying grades. The division of high-quality replica grades is usually an industry normal or a advertising gimmick used by retailers to draw buyers. Nevertheless replica bags<\/em><\/strong><\/a>, understanding the classification of reproduction baggage can nonetheless be useful when making purchases. Alibaba is a China-based e-commerce hub for sellers and patrons from across the globe.\n<\/p>\n

You can discover every thing from gold wristwatches to digital ones which were revalued over time as in the occasion that they were relics. If you want to discover more detailed data, you are able to do so in our \u201cWhere to buy luxurious duplicate brand watches\u201d evaluation . Alibaba.com has between 5 and 10 million registered buyers on its website. It wholesales merchandise worldwide, with a massive quantity of suppliers from China, giving the site a strong competitive advantage. A well-known assortment of duplicate merchandise Replica Handbags<\/em><\/strong><\/a>, Taobao, is an organization owned by Alibaba. This article may help you discover their clues and learn all about shopping for wholesale cloned merchandise.\n<\/p>\n

If you might be in search of Look alike luggage or designer impressed baggage for wholesale replica bags<\/em><\/strong><\/a>, then you should discover a good supplier. China additionally has economies of scale and they can produce the designer handbags for much cheaper than some other nation. The take care of all types of patterns and designs similar to crocodile leather-based prints replica bags<\/em><\/strong><\/a>, hand woven bags, leather bags and luxury purses. The prices of the baggage begin at $4 and their average is about $10. They sell tote luggage, clutches, cross body luggage, handbags and extra. The Luyo official retailer on Aliexpress is one of the best Louis Vuitton bag seller on Aliexpress.\n<\/p>\n

Some counterfeiters can scam consumers into believing that their bags are actual by setting the worth near what an unique bag would sometimes value. These counterfeiters prey on the buyer that’s looking for a reduction on a real bag and they keep their costs just below the normal real bag worth, to trick them. See why more patrons are making Bag Copy Co. their go-to for replica bags that ship. Our duplicate bag catalog consists of each major type category.\n<\/p>\n

Speaking of duplicate Pradas, at present, I\u2019ll share some tips on the method to spot fake Prada items (but mostly handbags). Fendi\u2019s Suede Half Moon Croissant Bag is a versatile shoulder type that mixes chocolate brown suede with gold hardware. It\u2019s one of my most-wanted bag designs by Fendi, however this timeless type is seriously out of price range.<\/p>\n","protected":false},"excerpt":{"rendered":"

21 Finest Duplicate Luggage Worth Shopping For 2024 Review These replicas are usually costlier because of the greater high quality requirements they adhere to. AA-grade replicas are slightly lower in high quality however still keep a high commonplace of element and materials. They may have minor deviations from the original however are generally well-crafted and…<\/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\/13388"}],"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=13388"}],"version-history":[{"count":1,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts\/13388\/revisions"}],"predecessor-version":[{"id":13389,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/posts\/13388\/revisions\/13389"}],"wp:attachment":[{"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/media?parent=13388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/categories?post=13388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcpv.demarco.ddnsfree.com\/index.php\/wp-json\/wp\/v2\/tags?post=13388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}