WordPress/wp-admin/js/revisions.js

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JavaScript
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window.wp = window.wp || {};
(function($) {
var Revision, Revisions, Diff, revisions;
revisions = wp.revisions = function() {
Diff = revisions.Diff = new Diff();
};
_.extend( revisions, { model: {}, view: {}, controller: {} } );
// Link settings.
revisions.model.settings = typeof wpRevisionsSettings === 'undefined' ? {} : wpRevisionsSettings;
/**
* ========================================================================
* CONTROLLERS
* ========================================================================
*/
/**
* wp.revisions.controller.Diff
*
* Controlls the diff
*/
Diff = revisions.controller.Diff = Backbone.Model.extend( {
rightDiff: 1,
leftDiff: 1,
revisions: null,
leftHandleRevisions: null,
rightHandleRevisions: null,
revisionsInteractions: null,
autosaves: true,
showSplitView: true,
singleRevision: true,
leftModelLoading: false, // keep track of model loads
rightModelLoading: false, // disallow slider interaction, also repeat loads, while loading
tickmarkView: null, // the slider tickmarks
slider: null, // the slider instance
constructor: function() {
var self = this;
this.slider = new revisions.view.Slider();
if ( null === this.revisions ) {
this.revisions = new Revisions(); // set up collection
this.startRightModelLoading();
this.revisions.fetch({ // load revision data
success: function() {
self.stopRightModelLoading();
self.completeApplicationSetup();
}
});
}
},
loadDiffs: function( models ) {
var self = this,
revisionsToLoad = models.where( { completed: false } ),
delay = 0,
totalChanges;
// match slider to passed revision_id
_.each( revisionsToLoad, function( revision ) {
if ( revision.get( 'ID' ) == revisions.model.settings.revision_id )
self.rightDiff = self.revisions.indexOf( revision ) + 1;
});
_.each( revisionsToLoad, function( revision ) {
_.delay( function() {
revision.fetch( {
update: true,
add: false,
remove: false,
success: function( model ) {
model.set( 'completed', true );
// stop spinner when all models are loaded
if ( 0 === models.where( { completed: false } ).length )
self.stopModelLoadingSpinner();
totalChanges = model.get( 'linesAdded' ) + model.get( 'linesDeleted' ),
scopeOfChanges = 'vsmall';
// Note: hard coded scope of changes
// TODO change to dynamic based on range of values
if ( totalChanges > 1 && totalChanges <= 3 ) {
scopeOfChanges = 'small';
} else if ( totalChanges > 3 && totalChanges <= 5 ) {
scopeOfChanges = 'med';
} else if ( totalChanges > 5 && totalChanges <= 10 ) {
scopeOfChanges = 'large';
} else if ( totalChanges > 10 ) {
scopeOfChanges = 'vlarge';
}
model.set( 'scopeOfChanges', scopeOfChanges );
if ( 0 !== self.rightDiff &&
model.get( 'ID' ) === self.revisions.at( self.rightDiff - 1 ).get( 'ID' ) ) {
// reload if current model refreshed
self.revisionView.render();
}
self.tickmarkView.render();
}
} );
}, delay ) ;
delay = delay + 150; // stagger model loads to avoid hammering server with requests
}
);
},
startLeftModelLoading: function() {
this.leftModelLoading = true;
$('#revision-diff-container').addClass('left-model-loading');
},
stopLeftModelLoading: function() {
this.leftModelLoading = false;
},
startRightModelLoading: function() {
this.rightModelLoading = true;
$('#revision-diff-container').addClass('right-model-loading');
},
stopRightModelLoading: function() {
this.rightModelLoading = false;
},
stopModelLoadingSpinner: function() {
$('#revision-diff-container').removeClass('right-model-loading');
$('#revision-diff-container').removeClass('left-model-loading');
},
reloadModel: function() {
if ( this.singleRevision ) {
this.reloadModelSingle();
} else {
this.reloadLeftRight();
}
},
// load the models for the single handle mode
reloadModelSingle: function() {
var self = this;
self.startRightModelLoading();
self.revisions.reload({
options: {
'showAutosaves': self.autosaves,
'showSplitView': self.showSplitView
},
success: function() {
var revisionCount = self.revisions.length;
self.revisionView.model = self.revisions;
self.revisionView.render();
self.loadDiffs( self.revisions );
self.tickmarkView.model = self.revisions;
self.tickmarkView.render();
self.slider.refresh({
'max': revisionCount - 1, // slider starts at 0 in single handle mode
'value': self.rightDiff - 1 // slider starts at 0 in single handle mode
}, true);
},
error: function() {
self.stopRightModelLoading();
}
});
},
// load the models for the left handle (the right handler has moved)
reloadLeft: function() {
var self = this;
self.startLeftModelLoading();
self.leftHandleRevisions = new Revisions( {}, {
'compareTo': self.revisions.at( self.rightDiff - 1 ).get( 'ID' ), // diff and model count off by 1
'showAutosaves': self.autosaves,
'showSplitView': self.showSplitView,
'rightHandleAt': self.rightDiff
});
self.leftHandleRevisions.fetch({
success: function(){
self.stopLeftModelLoading();
self.loadDiffs( self.leftHandleRevisions );
self.tickmarkView.model = self.leftHandleRevisions;
self.slider.refresh({
'max': self.revisions.length
});
// ensure right handle not beyond length
if ( self.rightDiff > self.revisions.length )
self.rightDiff = self.revisions.length;
},
error: function() {
self.stopLeftModelLoading();
}
});
},
// load the models for the right handle (the left handle has moved)
reloadRight: function() {
var self = this;
self.startRightModelLoading();
self.rightHandleRevisions = new Revisions( {}, {
'compareTo': self.revisions.at( self.leftDiff - 1 ).get( 'ID' ), // diff and model count off by 1
'showAutosaves': self.autosaves,
'showSplitView': self.showSplitView,
'leftHandleAt': self.leftDiff
});
self.rightHandleRevisions.fetch({
success: function(){
self.stopRightModelLoading();
self.loadDiffs( self.rightHandleRevisions );
self.tickmarkView.model = self.rightHandleRevisions;
self.slider.refresh({
'max': self.revisions.length
}, true);
},
error: function( response ) {
self.stopRightModelLoading();
}
});
},
/**
* reloadLeftRight reload models for both the left and right handles
*/
reloadLeftRight: function() {
this.startRightModelLoading();
this.startLeftModelLoading();
this.reloadLeft();
this.reloadRight();
},
disabledButtonCheck: function( val ) {
var maxVal = this.revisions.length - 1,
next = ! isRtl ? $( '#next' ) : $( '#previous' ),
prev = ! isRtl ? $( '#previous' ) : $( '#next' );
// Disable "Next" button if you're on the last node
if ( maxVal === val )
next.prop( 'disabled', true );
else
next.prop( 'disabled', false );
// Disable "Previous" button if you're on the 0 node
if ( 0 === val )
prev.prop( 'disabled', true );
else
prev.prop( 'disabled', false );
},
/**
* completeApplicationSetup finishes loading all views once the initial model load is complete
*/
completeApplicationSetup: function() {
this.revisionView = new revisions.view.Diff({
model: this.revisions
});
this.revisionView.render(); // render the revision view
this.loadDiffs( this.revisions ); // get the actual revisions data
this.revisionsInteractions = new revisions.view.Interact({
model: this.revisions
});
this.revisionsInteractions.render(); // render the interaction view
this.tickmarkView = new revisions.view.Tickmarks({
model: this.revisions
});
this.tickmarkView.render(); // render the tickmark view
}
});
/**
* ========================================================================
* VIEWS
* ========================================================================
*/
/**
* wp.revisions.view.Slider
*
* The slider
*/
revisions.view.Slider = Backbone.View.extend({
el: $( '#diff-slider' ),
singleRevision: true,
initialize: function( options ) {
this.options = _.defaults( options || {}, {
value: 0,
min: 0,
max: 1,
step: 1
});
},
/**
* respond to slider slide events
* Note: in one handle mode, jQuery UI reports leftmost position as 0
* in two handle mode, jQuery UI Slider reports leftmost position as 1
*/
slide: function( event, ui ) {
if ( this.singleRevision ) {
Diff.rightDiff = ( ui.value + 1 );
Diff.revisionView.render();
Diff.disabledButtonCheck( ui.value );
} else {
if ( ui.values[0] === ui.values[1] ) // prevent compare to self
return false;
if ( $( ui.handle ).hasClass( 'left-handle' ) ) {
// Left handler
if ( Diff.leftModelLoading ) // left model still loading, prevent sliding left handle
return false;
Diff.leftDiff = isRtl ? ui.values[1] : ui.values[0]; // handles are reversed in RTL mode
} else {
// Right handler
if ( Diff.rightModelLoading ) // right model still loading, prevent sliding right handle
return false;
Diff.rightDiff = isRtl ? ui.values[0] : ui.values[1]; // handles are reversed in RTL mode
}
Diff.revisionView.render();
}
},
/**
* responds to slider start sliding events
* in two handle mode stores start position, so if unchanged at stop event no need to reload diffs
* also swaps in the appropriate models - left handled or right handled
*/
start: function( event, ui ) {
// Not needed in one mode
if ( this.singleRevision )
return;
if ( $( ui.handle ).hasClass( 'left-handle' ) ) {
// Left handler
if ( Diff.leftModelLoading ) // left model still loading, prevent sliding left handle
return false;
Diff.revisionView.draggingLeft = true;
if ( Diff.revisionView.model !== Diff.leftHandleRevisions &&
null !== Diff.leftHandleRevisions ) {
Diff.revisionView.model = Diff.leftHandleRevisions; // use the left handle models
Diff.tickmarkView.model = Diff.leftHandleRevisions;
Diff.tickmarkView.render();
}
Diff.leftDiffStart = isRtl ? ui.values[1] : ui.values[0]; // in RTL mode the 'left handle' is the second in the slider, 'right' is first
} else {
// Right handler
if ( Diff.rightModelLoading || 0 === Diff.rightHandleRevisions.length) // right model still loading, prevent sliding right handle
return false;
if ( Diff.revisionView.model !== Diff.rightHandleRevisions &&
null !== Diff.rightHandleRevisions ) {
Diff.revisionView.model = Diff.rightHandleRevisions; // use the right handle models
Diff.tickmarkView.model = Diff.rightHandleRevisions;
Diff.tickmarkView.render();
}
Diff.revisionView.draggingLeft = false;
Diff.rightDiffStart = isRtl ? ui.values[0] : ui.values[1]; // in RTL mode the 'left handle' is the second in the slider, 'right' is first
}
},
/**
* responds to slider stop events
* in two handled mode, if the handle that stopped has moved, reload the diffs for the other handle
* the other handle compares to this handle's position, so if it changes they need to be recalculated
*/
stop: function( event, ui ) {
// Not needed in one mode
if ( this.singleRevision )
return;
// calculate and generate a diff for comparing to the left handle
// and the right handle, swap out when dragging
if ( $( ui.handle ).hasClass( 'left-handle' ) ) {
// Left handler
if ( Diff.leftDiffStart !== isRtl ? ui.values[1] : ui.values[0] ) // in RTL mode the 'left handle' is the second in the slider, 'right' is first
Diff.reloadRight();
} else {
// Right handler
if ( Diff.rightDiffStart !== isRtl ? ui.values[0] : ui.values[1] ) // in RTL mode the 'left handle' is the second in the slider, 'right' is first
Diff.reloadLeft();
}
},
addTooltip: function( handle, message ) {
handle.find( '.ui-slider-tooltip' ).html( message );
},
width: function() {
return $( '#diff-slider' ).width();
},
setWidth: function( width ) {
$( '#diff-slider' ).width( width );
},
refresh: function( options, slide ) {
$( '#diff-slider' ).slider( 'option', options );
// Triggers the slide event
if ( slide )
$( '#diff-slider' ).trigger( 'slide' );
Diff.disabledButtonCheck( options.value );
},
option: function( key ) {
return $( '#diff-slider' ).slider( 'option', key );
},
render: function() {
var self = this;
// this.$el doesn't work, why?
$( '#diff-slider' ).slider( {
slide: $.proxy( self.slide, self ),
start: $.proxy( self.start, self ),
stop: $.proxy( self.stop, self )
} );
// Set options
this.refresh( this.options );
}
});
/**
* wp.revisions.view.Tickmarks
*
* The slider tickmarks.
*/
revisions.view.Tickmarks = Backbone.View.extend({
el: $('#diff-slider-ticks'),
template: wp.template('revision-ticks'),
model: Revision,
resetTicks: function() {
var sliderMax, sliderWidth, adjustMax, tickWidth, tickCount = 0, aTickWidth, tickMargin, self = this, firstTick, lastTick;
sliderMax = Diff.slider.option( 'max' );
sliderWidth = Diff.slider.width();
adjustMax = Diff.singleRevision ? 0 : 1;
tickWidth = Math.floor( sliderWidth / ( sliderMax - adjustMax ) );
tickWidth = ( tickWidth > 50 ) ? 50 : tickWidth; // set minimum and maximum widths for tick marks
tickWidth = ( tickWidth < 10 ) ? 10 : tickWidth;
sliderWidth = tickWidth * ( sliderMax - adjustMax ); // calculate the slider width
aTickWidth = $( '.revision-tick' ).width();
if ( tickWidth !== aTickWidth ) { // is the width already set correctly?
$( '.revision-tick' ).each( function() {
tickMargin = Math.floor( ( tickWidth - $( this ).width() ) / 2 ) + 1;
$( this ).css( 'border-left', tickMargin + 'px solid #f7f7f7'); // space the ticks out using margins
$( this ).css( 'border-right', ( tickWidth - tickMargin - $( this ).width() ) + 'px solid #f7f7f7'); // space the ticks out using margins
});
firstTick = $( '.revision-tick' ).first(); //cache selectors for optimization
lastTick = $( '.revision-tick' ).last();
sliderWidth = sliderWidth + Math.ceil( ( tickWidth - ( lastTick.outerWidth() - lastTick.innerWidth() ) ) / 2 ); // room for the last tick
sliderWidth = sliderWidth + Math.ceil( ( tickWidth - ( firstTick.outerWidth() - firstTick.innerWidth() ) ) / 2 ); // room for the first tick
firstTick.css( 'border-left', 'none' ); // first tick gets no left border
lastTick.css( 'border-right', 'none' ); // last tick gets no right border
}
/**
* reset the slider width
*/
Diff.slider.setWidth( sliderWidth );
$( '.diff-slider-ticks-wrapper' ).width( sliderWidth );
$( '#diff-slider-ticks' ).width( sliderWidth );
/**
* go through all ticks, add hover and click interactions
*/
$( '.revision-tick' ).each( function() {
Diff.slider.addTooltip ( $( this ), Diff.revisions.at( tickCount++ ).get( 'titleTooltip' ) );
$( this ).hover(
function() {
$( this ).find( '.ui-slider-tooltip' ).show().append('<div class="arrow"></div>');
},
function() {
$( this ).find( '.ui-slider-tooltip' ).hide().find( '.arrow' ).remove();
}
);
/**
* move the slider handle when the tick marks are clicked
*/
$( this ).on( 'click',
{ tickCount: tickCount }, // pass the tick through so we know where to move the handle
function( event ) {
if ( Diff.slider.singleRevision ) { // single handle mode
Diff.rightDiff = event.data.tickCount; // reposition the right handle
Diff.slider.refresh({
value: Diff.rightDiff - 1
} );
} else { //compare two mode
if ( isRtl ) {
if ( event.data.tickCount < Diff.leftDiff ) { // click was on the 'left' side
Diff.rightDiff = event.data.tickCount; // set the 'right' handle location
Diff.reloadLeft(); // reload the left handle comparison models
} else { // middle or 'right' clicks
Diff.leftDiff = event.data.tickCount; // set the 'left' handle location
Diff.reloadRight(); // reload right handle models
}
} else {
if ( event.data.tickCount < Diff.leftDiff ) { // click was on the 'left' side
Diff.leftDiff = event.data.tickCount; // set the left handle location
Diff.reloadRight(); // reload the right handle comparison models
} else { // middle or 'right' clicks
Diff.rightDiff = event.data.tickCount; // set the right handle location
Diff.reloadLeft(); // reload left handle models
}
}
Diff.slider.refresh( { // set the slider handle positions
values: [ isRtl ? Diff.rightDiff : Diff.leftDiff, isRtl ? Diff.leftDiff : Diff.rightDiff ]
} );
}
Diff.revisionView.render(); // render the main view
} );
} );
},
// render the tick mark view
render: function() {
var self = this, addHtml;
if ( null !== self.model ) {
addHtml = "";
_.each ( self.model.models, function( theModel ) {
addHtml = addHtml + self.template ( theModel.toJSON() );
});
self.$el.html( addHtml );
}
self.resetTicks();
return self;
}
} );
/**
* wp.revisions.view.Interact
*
* Next/Prev buttons and the slider
*/
revisions.view.Interact = Backbone.View.extend({
el: $( '#revision-interact' ),
template: wp.template( 'revision-interact' ),
// next and previous buttons, only available in compare one mode
events: {
'click #next': ! isRtl ? 'nextRevision' : 'previousRevision',
'click #previous': ! isRtl ? 'previousRevision' : 'nextRevision'
},
render: function() {
var modelcount;
this.$el.html( this.template );
modelcount = Diff.revisions.length;
Diff.slider.singleRevision = Diff.singleRevision;
Diff.slider.render();
if ( Diff.singleRevision ) {
Diff.slider.refresh({
value: Diff.rightDiff - 1, // rightDiff value is off model index by 1
min: 0,
max: modelcount - 1
});
$( '#revision-diff-container' ).removeClass( 'comparing-two-revisions' );
} else {
Diff.slider.refresh({
// in RTL mode the 'left handle' is the second in the slider, 'right' is first
values: [ isRtl ? Diff.rightDiff : Diff.leftDiff, isRtl ? Diff.leftDiff : Diff.rightDiff ],
min: 1,
max: modelcount + 1,
range: true
});
$( '#revision-diff-container' ).addClass( 'comparing-two-revisions' );
// in RTL mode the 'left handle' is the second in the slider, 'right' is first
$( '#diff-slider a.ui-slider-handle' ).first().addClass( isRtl ? 'right-handle' : 'left-handle' );
$( '#diff-slider a.ui-slider-handle' ).last().addClass( isRtl ? 'left-handle' : 'right-handle' );
}
return this;
},
// go to the next revision
nextRevision: function() {
if ( Diff.rightDiff < this.model.length ) // unless at right boundry
Diff.rightDiff = Diff.rightDiff + 1 ;
Diff.revisionView.render();
Diff.slider.refresh({
value: Diff.rightDiff - 1
}, true );
},
// go to the previous revision
previousRevision: function() {
if ( Diff.rightDiff > 1 ) // unless at left boundry
Diff.rightDiff = Diff.rightDiff - 1 ;
Diff.revisionView.render();
Diff.slider.refresh({
value: Diff.rightDiff - 1
}, true );
}
});
/**
* wp.revisions.view.Diff
*
* Diff, compare two checkbox and restore button
*/
revisions.view.Diff = Backbone.View.extend({
el: $( '#revisions-diff' ),
template: wp.template( 'revisions-diff' ),
draggingLeft: false,
// the compare two button is in this view, add the interaction here
events: {
'click #compare-two-revisions': 'compareTwo',
'click #restore-revision': 'restore'
},
// render the revisions
render: function() {
var addHtml = '', thediff;
// compare two revisions mode?
if ( ! Diff.singleRevision ) {
if ( this.draggingLeft ) {
thediff = Diff.leftDiff - 1; //leftDiff value is off model index by 1
if ( this.model.at( thediff ) ) {
addHtml = this.template( this.model.at( thediff ).toJSON() );
}
} else { // dragging right handle
thediff = Diff.rightDiff - 1; // rightDiff value is off model index by 1
if ( this.model.at( thediff ) ) {
addHtml = this.template( this.model.at( thediff ).toJSON() );
}
}
} else { // end compare two revisions mode, eg only one slider handle
if ( this.model.at( Diff.rightDiff - 1 ) ) { // rightDiff value is off model index by 1
addHtml = this.template( this.model.at( Diff.rightDiff - 1 ).toJSON() );
}
}
this.$el.html( addHtml );
if ( this.model.length < 2 ) {
$( '#diff-slider' ).hide(); // don't allow compare two if fewer than three revisions
$( '.diff-slider-ticks-wrapper' ).hide();
}
this.toggleCompareTwoCheckbox();
// hide the restore button when on the last sport/current post data
$( '#restore-revision' ).toggle( ! Diff.revisions.at( Diff.rightDiff - 1 ).get( 'isCurrent' ) );
return this;
},
toggleCompareTwoCheckbox: function() {
// don't allow compare two if fewer than three revisions
if ( this.model.length < 3 )
$( '#toggle-revision-compare-mode' ).hide();
$( '#compare-two-revisions' ).prop( 'checked', ! Diff.singleRevision );
},
// turn on/off the compare two mode
compareTwo: function() {
if ( $( '#compare-two-revisions' ).is( ':checked' ) ) { // compare 2 mode
Diff.singleRevision = false ;
// in RTL mode handles are swapped, so boundary checks are different;
if ( isRtl ){
Diff.leftDiff = Diff.revisions.length; // put the left handle at the rightmost position, representing current revision
if ( Diff.revisions.length === Diff.rightDiff ) // make sure 'left' handle not in rightmost slot
Diff.rightDiff = Diff.rightDiff - 1;
} else {
if ( 1 === Diff.rightDiff ) // make sure right handle not in leftmost slot
Diff.rightDiff = 2;
}
Diff.revisionView.draggingLeft = false;
revisions.model.settings.revision_id = ''; // reset passed revision id so switching back to one handle mode doesn't re-select revision
Diff.reloadLeftRight(); // load diffs for left and right handles
Diff.revisionView.model = Diff.rightHandleRevisions;
} else { // compare one mode
Diff.singleRevision = true;
Diff.revisionView.draggingLeft = false;
Diff.reloadModelSingle();
}
Diff.revisionsInteractions.render();
Diff.tickmarkView.render();
},
restore: function() {
document.location = $( '#restore-revision' ).data( 'restoreLink' );
}
});
/**
* ========================================================================
* MODELS
* ========================================================================
*/
/**
* wp.revisions.Revision
*/
Revision = revisions.model.Revision = Backbone.Model.extend({
idAttribute: 'ID',
defaults: {
ID: 0,
titleTo: '',
titleTooltip: '',
titleFrom: '',
diff: '<div class="diff-loading"><div class="spinner"></div></div>',
restoreLink: '',
completed: false,
linesAdded: 0,
linesDeleted: 0,
scopeOfChanges: 'none',
previousID: 0,
isCurrent: false
},
url: function() {
if ( Diff.singleRevision ) {
return ajaxurl +
'?action=revisions-data' +
'&show_autosaves=true' +
'&show_split_view=true' +
'&nonce=' + revisions.model.settings.nonce +
'&single_revision_id=' + this.id +
'&compare_to=' + this.get( 'previousID' ) +
'&post_id=' + revisions.model.settings.post_id;
} else {
return this.collection.url() + '&single_revision_id=' + this.id;
}
}
});
/**
* wp.revisions.Revisions
*/
Revisions = revisions.Revisions = Backbone.Collection.extend({
model: Revision,
initialize: function( models, options ) {
this.options = _.defaults( options || {}, {
'compareTo': revisions.model.settings.post_id,
'post_id': revisions.model.settings.post_id,
'showAutosaves': true,
'showSplitView': true,
'rightHandleAt': 0,
'leftHandleAt': 0,
'nonce': revisions.model.settings.nonce
});
},
url: function() {
return ajaxurl +
'?action=revisions-data' +
'&compare_to=' + this.options.compareTo + // revision are we comparing to
'&post_id=' + this.options.post_id + // the post id
'&show_autosaves=' + this.options.showAutosaves + // show or hide autosaves
'&show_split_view=' + this.options.showSplitView + // show in split view or single column view
'&right_handle_at=' + this.options.rightHandleAt + // mark point for comparison list
'&left_handle_at=' + this.options.leftHandleAt + // mark point for comparison list
'&nonce=' + this.options.nonce;
},
reload: function( options ) {
this.options = _.defaults( options.options || {}, this.options );
this.fetch({
success: options.success || null,
error: options.error || null
});
}
} );
$( wp.revisions );
}(jQuery));