/** * @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 checkbox view. this.views.add( new revisions.view.Checkbox({ model: this.model }) ); // Add the button view. this.views.add( new revisions.view.Buttons({ 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 visually hidden slider help view. this.views.add( new revisions.view.SliderHelp() ); // 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: $('.compare-two-revisions').prop('checked') }); } }); // The slider visually hidden help view. revisions.view.SliderHelp = wp.Backbone.View.extend({ className: 'revisions-slider-hidden-help', template: wp.template( 'revisions-slider-hidden-help' ) }); // The tooltip view. // Encapsulates the tooltip. revisions.view.Tooltip = wp.Backbone.View.extend({ className: 'revisions-tooltip', template: wp.template('revisions-meta'), initialize: function() { this.listenTo( this.model, 'change:offset', this.render ); this.listenTo( this.model, 'change:hovering', this.toggleVisibility ); this.listenTo( this.model, 'change:scrubbing', this.toggleVisibility ); }, prepare: function() { if ( _.isNull( this.model.get('revision') ) ) { return; } else { return _.extend( { type: 'tooltip' }, { attributes: this.model.get('revision').toJSON() }); } }, render: function() { var otherDirection, direction, directionVal, flipped, css = {}, position = this.model.revisions.indexOf( this.model.get('revision') ) + 1; flipped = ( position / this.model.revisions.length ) > 0.5; if ( isRtl ) { direction = flipped ? 'left' : 'right'; directionVal = flipped ? 'leftPlusWidth' : direction; } else { direction = flipped ? 'right' : 'left'; directionVal = flipped ? 'rightPlusWidth' : direction; } otherDirection = 'right' === direction ? 'left': 'right'; wp.Backbone.View.prototype.render.apply( this, arguments ); css[direction] = this.model.get('offset')[directionVal] + 'px'; css[otherDirection] = ''; this.$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(); }, accessibilityHelper: function() { var handles = $( '.ui-slider-handle' ); handles.first().attr( { role: 'button', 'aria-labelledby': 'diff-title-from diff-title-author', 'aria-describedby': 'revisions-slider-hidden-help', } ); handles.last().attr( { role: 'button', 'aria-labelledby': 'diff-title-to diff-title-author', 'aria-describedby': 'revisions-slider-hidden-help', } ); }, mouseMove: function( e ) { var zoneCount = this.model.revisions.length - 1, // One fewer zone than models. sliderFrom = this.$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 ); this.accessibilityHelper(); } else { handles.removeClass('from-handle to-handle'); this.accessibilityHelper(); } }, 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));

خطوة

المصانع تستغني عن ايديها العاملة

مايو 20, 2025

4٬707 دقيقة واحدة

كتبت مريم سمير

بدأت المصانع ان تستخدم طفرة في عالم الذكاء الاصطناعي ” الروبوتس” ، من الممكن ان يحدث سرعة في الإنتاج لكن هل يمكن الاستغناء عن البشر ؟

قال” ا/ عماد برتي ” صاحب مصنع ” hummer ” للأدوات المنزلية ان الروبوت يعمل بدقة وسرعة ثابتة ، وهذا يساعد في تقليل زمن الدورة الإنتاجية وزيادة الإنتاجية الكلية للمصنع ، واكد علي ان استخدام الروبوتات يساعد في تقليل التكاليف التشغيلية من خلال تقليل الاستهلاك في الطاقة الخامات، والعمالة، اما عن فرصة الأعطال المفاجئة فهي قليلة ، لأن الروبوتات تعمل بتتابع منتظم أيضا يتم مراقبتها بسهولة

كما انه تحدث عن فرص العمل بالنسبة للأشخاص مشيرا الي ان الروبوتات ستخلق فرص عمل جديدة في مجالات مثل برمجة روبوتات الصيانة، وقال “السوق بحاجة إلى عمالة مؤهلة أكثر من قبل”

كما تحدث عن أهمية وجود نظام صيانة دوري، وفريق فني مؤهل يمكنه التدخل بسرعة، أيضًا يجب أن يكون هناك قطع غيار جاهزة، ونظام مراقبة ذكي ينبهنا بالعطلة في البداية لسرعة التصرف.

كما ذكر أن هناك تحديات مثل

ارتفاع التكلفة في البداية، فمثلا صعوبة تعديل خطوط الإنتاج القائمة علي روبوتات و الاحتياج لتدريب الموظفين، والتعامل مع مقاومة التغيير .

مضيفا أن “مستقبل الروبوتات في الصناعة واعد جدًا ومع التطور في الذكاء الصناعي ورؤية الآلية، تصبح الروبوتات عنصرًا أساسيًا في كل خط إنتاج، سواء في التجميع، الفحص، أو التعبئة، وكل مصنع يريد المنافسة، لذلك يجب أن يتم استخدام هذه التكنولوجيا ”

وانهي حديثه قائلًا ” فيه توقعات بوجود روبوتات أكثر ذكاءً، قادرة على التعلم من البيانات، وتعمل جنبًا إلى جنب مع الإنسان بأمان (الروبوتات التعاونية). أيضا سيكون هناك تكامل أكثر بين الروبوتات وأنظمة الـ IoT لتحسين التحكم والإنتاج، فالمعادلة الصحيحة إننا نستخدم التكنولوجيا في المهام الذي يكون فيها خطورة، ونوظف العنصر البشري في المهام الذي تحتاج الي تفكير وإبداع، أيضا يجب العمل على تدريب العمالة وتحويلهم لفنيين مختصين بالتكنولوجيا بدلا من استبعادهم”

مايو 20, 2025

4٬707 دقيقة واحدة