View (engine/view)

@ckeditor/ckeditor5-engine/src/view/view

Editor's view controller class. Its main responsibility is DOM - View management for editing purposes, to provide abstraction over the DOM structure and events and hide all browsers quirks.

View controller renders view document to DOM whenever view structure changes. To determine when view can be rendered, all changes need to be done using the change method, using DowncastWriter:

view.change( writer => {
	writer.insert( position, writer.createText( 'foo' ) );
} );

View controller also register observers which observes changes on DOM and fire events on the Document. Note that the following observers are added by the class constructor and are always available:

This class also binds the DOM and the view elements.

If you do not need full a DOM - view management, and only want to transform a tree of view elements to a tree of DOM elements you do not need this controller. You can use the DomConverter instead.

Filtering

Public
Inherited
Mixed
Protected
Private
Deprecated

Properties

document : Document

readonly

Instance of the Document associated with this view controller.

See source
domConverter : DomConverter

readonly

Instance of the domConverter used by renderer and observers.

See source
domRoots : Map.<String, HTMLElement>

readonly

Roots of the DOM tree. Map on the HTMLElements with roots names as keys.

See source
hasDomSelection : Boolean

readonly

Informs whether the DOM selection is inside any of the DOM roots managed by the view.

See source
isRenderingInProgress : Boolean

readonly

Used to prevent calling forceRender and change during rendering view to the DOM.

See source
_renderer : Renderer

protected

Instance of the renderer.

See source
_hasChangedSinceTheLastRendering : Boolean

private

Internal flag that disables rendering when there are no changes since the last rendering. It stores information about changed selection and changed elements from attached document roots.

See source
_initialDomRootAttributes : WeakMap.<HTMLElement, Object>

private

A DOM root attributes cache. It saves the initial values of DOM root attributes before the DOM element is attached to the view so later on, when the view is destroyed (detachDomRoot), they can be easily restored. This way, the DOM element can go back to the (clean) state as if the editing view never used it.

See source
_observers : Map.<Function, Observer>

private

Map of registered observers.

See source
_ongoingChange : Boolean

private

Is set to true when view changes are currently in progress.

See source
_postFixersInProgress : Boolean

private

Used to prevent calling forceRender and change during rendering view to the DOM.

See source
_renderingDisabled : Boolean

private

Internal flag to temporary disable rendering. See the usage in the _disableRendering.

See source
_writer : DowncastWriter

private

DowncastWriter instance used in change method callbacks.

See source

Methods

constructor( stylesProcessor )

Parameters

stylesProcessor : StylesProcessor

The styles processor instance.
addObserver( Observer ) → Observer

Creates observer of the given type if not yet created, enables it and attaches to all existing and future DOM roots.

See source

Note: Observers are recognized by their constructor (classes). A single observer will be instantiated and used only when registered for the first time. This means that features and other components can register a single observer multiple times without caring whether it has been already added or not.

Parameters

Observer : function

The constructor of an observer to add. Should create an instance inheriting from Observer.

Returns

Observer

Added observer instance.
attachDomRoot( domRoot, [ name ] )

Attaches a DOM root element to the view element and enable all observers on that element. Also mark element to be synchronized with the view what means that all child nodes will be removed and replaced with content of the view root.

See source

This method also will change view element name as the same as tag name of given dom root. Name is always transformed to lower case.

Note: Use detachDomRoot() to revert this action.

Parameters

domRoot : Element

DOM root element.

[ name ] : String

Name of the root.

Defaults to 'main'
bind( bindProperties ) → Object

mixed
Binds observable properties to other objects implementing the Observable interface.

See source
Read more in the dedicated guide covering the topic of property bindings with some additional examples.

Consider two objects: a button and an associated command (both Observable).

A simple property binding could be as follows:
```
button.bind( 'isEnabled' ).to( command, 'isEnabled' );
```
or even shorter:
```
button.bind( 'isEnabled' ).to( command );
```
which works in the following way:
- button.isEnabled instantly equals command.isEnabled,
- whenever command.isEnabled changes, button.isEnabled will immediately reflect its value.
Note: To release the binding, use unbind.

You can also "rename" the property in the binding by specifying the new name in the to() chain:
```
button.bind( 'isEnabled' ).to( command, 'isWorking' );
```
It is possible to bind more than one property at a time to shorten the code:
```
button.bind( 'isEnabled', 'value' ).to( command );
```
which corresponds to:
```
button.bind( 'isEnabled' ).to( command );
button.bind( 'value' ).to( command );
```
The binding can include more than one observable, combining multiple data sources in a custom callback:
```
button.bind( 'isEnabled' ).to( command, 'isEnabled', ui, 'isVisible',
	( isCommandEnabled, isUIVisible ) => isCommandEnabled && isUIVisible );
```
Using a custom callback allows processing the value before passing it to the target property:
```
button.bind( 'isEnabled' ).to( command, 'value', value => value === 'heading1' );
```
It is also possible to bind to the same property in an array of observables. To bind a button to multiple commands (also Observables) so that each and every one of them must be enabled for the button to become enabled, use the following code:
```
button.bind( 'isEnabled' ).toMany( [ commandA, commandB, commandC ], 'isEnabled',
	( isAEnabled, isBEnabled, isCEnabled ) => isAEnabled && isBEnabled && isCEnabled );
```
Parameters

bindProperties : String

Observable properties that will be bound to other observable(s).

Returns

Object

The bind chain with the to() and toMany() methods.
change( callback ) → *
The change() method is the primary way of changing the view. You should use it to modify any node in the view tree. It makes sure that after all changes are made the view is rendered to the DOM (assuming that the view will be changed inside the callback). It prevents situations when the DOM is updated when the view state is not yet correct. It allows to nest calls one inside another and still performs a single rendering after all those changes are made. It also returns the return value of its callback.

See source
```
const text = view.change( writer => {
	const newText = writer.createText( 'foo' );
	writer.insert( position1, newText );

	view.change( writer => {
		writer.insert( position2, writer.createText( 'bar' ) );
	} );

	writer.remove( range );

	return newText;
} );
```
When the outermost change block is done and rendering to the DOM is over the View#render event is fired.

This method throws a applying-view-changes-on-rendering error when the change block is used after rendering to the DOM has started.

Parameters

callback : function

Callback function which may modify the view.

Returns

*

Value returned by the callback.
createPositionAfter( item ) → Position

Creates a new position after given view item.

See source

Parameters

item : Item

View item after which the position should be located.

Returns

Position
createPositionAt( itemOrPosition, [ offset ] )
Creates position at the given location. The location can be specified as:

See source
- a position,
- parent element and offset (offset defaults to 0),
- parent element and 'end' (sets position at the end of that element),
- view item and 'before' or 'after' (sets position before or after given view item).
This method is a shortcut to other constructors such as:
- createPositionBefore,
- createPositionAfter,
Parameters

itemOrPosition : Item | Position

[ offset ] : Number | 'end' | 'before' | 'after'

Offset or one of the flags. Used only when first parameter is a view item.
createPositionBefore( item ) → Position

Creates a new position before given view item.

See source

Parameters

item : Item

View item before which the position should be located.

Returns

Position
createRange( start, [ end ] ) → Range

Creates a range spanning from start position to end position.

See source

Note: This factory method creates it's own Position instances basing on passed values.

Parameters

start : Position

Start position.

[ end ] : Position

End position. If not set, range will be collapsed at start position.

Returns

Range
createRangeIn( element ) → Range

Creates a range inside an element which starts before the first child of that element and ends after the last child of that element.

See source

Parameters

element : Element

Element which is a parent for the range.

Returns

Range
createRangeOn( item ) → Range

Creates a range that starts before given view item and ends after it.

See source

Parameters

item : Item

Returns

Range

`createSelection( [ selectable ], [ placeOrOffset ], [ options ] = { [options.backward], [options.fake], [options.label] } ) → Selection`

Creates new Selection instance.

See source

// Creates empty selection without ranges.
const selection = view.createSelection();

// Creates selection at the given range.
const range = view.createRange( start, end );
const selection = view.createSelection( range );

// Creates selection at the given ranges
const ranges = [ view.createRange( start1, end2 ), view.createRange( star2, end2 ) ];
const selection = view.createSelection( ranges );

// Creates selection from the other selection.
const otherSelection = view.createSelection();
const selection = view.createSelection( otherSelection );

// Creates selection from the document selection.
const selection = view.createSelection( editor.editing.view.document.selection );

// Creates selection at the given position.
const position = view.createPositionFromPath( root, path );
const selection = view.createSelection( position );

// Creates collapsed selection at the position of given item and offset.
const paragraph = view.createContainerElement( 'paragraph' );
const selection = view.createSelection( paragraph, offset );

// Creates a range inside an element which starts before the
// first child of that element and ends after the last child of that element.
const selection = view.createSelection( paragraph, 'in' );

// Creates a range on an item which starts before the item and ends
// just after the item.
const selection = view.createSelection( paragraph, 'on' );

Selection's factory method allow passing additional options (backward, fake and label) as the last argument.

// Creates backward selection.
const selection = view.createSelection( range, { backward: true } );

Fake selection does not render as browser native selection over selected elements and is hidden to the user. This way, no native selection UI artifacts are displayed to the user and selection over elements can be represented in other way, for example by applying proper CSS class.

Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM (and be properly handled by screen readers).

// Creates fake selection with label.
const selection = view.createSelection( range, { fake: true, label: 'foo' } );

Parameters

[ selectable ] : Selectable

[ placeOrOffset ] : Number | 'before' | 'end' | 'after' | 'on' | 'in'

Offset or place when selectable is an Item.

[ options ] : Object

Properties

[ options.backward ] : Boolean: Sets this selection instance to be backward.
[ options.fake ] : Boolean: Sets this selection instance to be marked as fake.
[ options.label ] : String: Label for the fake selection.

Returns

Selection

decorate( methodName )

mixed
Turns the given methods of this object into event-based ones. This means that the new method will fire an event (named after the method) and the original action will be plugged as a listener to that event.

See source
Read more in the dedicated guide covering the topic of decorating methods with some additional examples.

Decorating the method does not change its behavior (it only adds an event), but it allows to modify it later on by listening to the method's event.

For example, to cancel the method execution the event can be stopped:
```
class Foo {
	constructor() {
		this.decorate( 'method' );
	}

	method() {
		console.log( 'called!' );
	}
}

const foo = new Foo();
foo.on( 'method', ( evt ) => {
	evt.stop();
}, { priority: 'high' } );

foo.method(); // Nothing is logged.
```
Note: The high priority listener has been used to execute this particular callback before the one which calls the original method (which uses the "normal" priority).

It is also possible to change the returned value:
```
foo.on( 'method', ( evt ) => {
	evt.return = 'Foo!';
} );

foo.method(); // -> 'Foo'
```
Finally, it is possible to access and modify the arguments the method is called with:
```
method( a, b ) {
	console.log( `${ a }, ${ b }`  );
}

// ...

foo.on( 'method', ( evt, args ) => {
	args[ 0 ] = 3;

	console.log( args[ 1 ] ); // -> 2
}, { priority: 'high' } );

foo.method( 1, 2 ); // -> '3, 2'
```
Parameters

methodName : String

Name of the method to decorate.
delegate( events ) → EmitterMixinDelegateChain

mixed
Delegates selected events to another Emitter. For instance:

See source
```
emitterA.delegate( 'eventX' ).to( emitterB );
emitterA.delegate( 'eventX', 'eventY' ).to( emitterC );
```
then eventX is delegated (fired by) emitterB and emitterC along with data:
```
emitterA.fire( 'eventX', data );
```
and eventY is delegated (fired by) emitterC along with data:
```
emitterA.fire( 'eventY', data );
```
Parameters

events : String

Event names that will be delegated to another emitter.

Returns

EmitterMixinDelegateChain
destroy()

Destroys this instance. Makes sure that all observers are destroyed and listeners removed.

See source
detachDomRoot( name )

Detaches a DOM root element from the view element and restores its attributes to the state before attachDomRoot().

See source

Parameters

name : String

Name of the root to detach.
disableObservers()

Disables all added observers.

See source
enableObservers()

Enables all added observers.

See source
fire( eventOrInfo, [ args ] ) → *

mixed

Fires an event, executing all callbacks registered for it.

See source

The first parameter passed to callbacks is an EventInfo object, followed by the optional args provided in the fire() method call.

Parameters

eventOrInfo : String | EventInfo

The name of the event or EventInfo object if event is delegated.

[ args ] : *

Additional arguments to be passed to the callbacks.

Returns

*

By default the method returns undefined. However, the return value can be changed by listeners through modification of the evt.return's property (the event info is the first param of every callback).
focus()

It will focus DOM element representing EditableElement that is currently having selection inside.

See source
forceRender()

Forces rendering view document to DOM. If any view changes are currently in progress, rendering will start after all change blocks are processed.

See source

Note that this method is dedicated for special cases. All view changes should be wrapped in the change block and the view will automatically check whether it needs to render DOM or not.

Throws CKEditorError applying-view-changes-on-rendering when trying to re-render when rendering to DOM has already started.
getDomRoot( [ name ] ) → Element

Gets DOM root element.

See source

Parameters

[ name ] : String

Name of the root.

Defaults to 'main'

Returns

Element

DOM root element instance.
getObserver( Observer ) → Observer | undefined

Returns observer of the given type or undefined if such observer has not been added yet.

See source

Parameters

Observer : function

The constructor of an observer to get.

Returns

Observer | undefined

Observer instance or undefined.
listenTo( emitter, event, callback, [ options ] = { [options.priority] } )

mixed
Registers a callback function to be executed when an event is fired in a specific (emitter) object.

See source
Events can be grouped in namespaces using :. When namespaced event is fired, it additionally fires all callbacks for that namespace.
```
// myEmitter.on( ... ) is a shorthand for myEmitter.listenTo( myEmitter, ... ).
myEmitter.on( 'myGroup', genericCallback );
myEmitter.on( 'myGroup:myEvent', specificCallback );

// genericCallback is fired.
myEmitter.fire( 'myGroup' );
// both genericCallback and specificCallback are fired.
myEmitter.fire( 'myGroup:myEvent' );
// genericCallback is fired even though there are no callbacks for "foo".
myEmitter.fire( 'myGroup:foo' );
```
An event callback can stop the event and set the return value of the fire method.

Parameters

emitter : Emitter

The object that fires the event.

event : String

The name of the event.

callback : function

The function to be called on event.

[ options ] : Object

Additional options.

Properties

[ options.priority ] : PriorityString | Number

The priority of this event callback. The higher the priority value the sooner the callback will be fired. Events having the same priority are called in the order they were added.

Defaults to 'normal'

Defaults to {}
off( event, callback )

mixed

Stops executing the callback on the given event. Shorthand for this.stopListening( this, event, callback ).

See source

Parameters

event : String

The name of the event.

callback : function

The function to stop being called.
on( event, callback, [ options ] = { [options.priority] } )

mixed

Registers a callback function to be executed when an event is fired.

See source

Shorthand for this.listenTo( this, event, callback, options ) (it makes the emitter listen on itself).

Parameters

event : String

The name of the event.

callback : function

The function to be called on event.

[ options ] : Object

Additional options.

Properties

[ options.priority ] : PriorityString | Number

The priority of this event callback. The higher the priority value the sooner the callback will be fired. Events having the same priority are called in the order they were added.

Defaults to 'normal'

Defaults to {}
once( event, callback, [ options ] = { [options.priority] } )

mixed

Registers a callback function to be executed on the next time the event is fired only. This is similar to calling on followed by off in the callback.

See source

Parameters

event : String

The name of the event.

callback : function

The function to be called on event.

[ options ] : Object

Additional options.

Properties

[ options.priority ] : PriorityString | Number

The priority of this event callback. The higher the priority value the sooner the callback will be fired. Events having the same priority are called in the order they were added.

Defaults to 'normal'

Defaults to {}
scrollToTheSelection()

Scrolls the page viewport and domRoots with their ancestors to reveal the caret, if not already visible to the user.

See source
set( name, [ value ] )

mixed

Creates and sets the value of an observable property of this object. Such a property becomes a part of the state and is observable.

See source

It accepts also a single object literal containing key/value pairs with properties to be set.

This method throws the observable-set-cannot-override error if the observable instance already has a property with the given property name. This prevents from mistakenly overriding existing properties and methods, but means that foo.set( 'bar', 1 ) may be slightly slower than foo.bar = 1.

Parameters

name : String | Object

The property's name or object with name=>value pairs.

[ value ] : *

The property's value (if name was passed in the first parameter).
stopDelegating( [ event ], [ emitter ] )

mixed
Stops delegating events. It can be used at different levels:

See source
- To stop delegating all events.
- To stop delegating a specific event to all emitters.
- To stop delegating a specific event to a specific emitter.
Parameters

[ event ] : String

The name of the event to stop delegating. If omitted, stops it all delegations.

[ emitter ] : Emitter

(requires event) The object to stop delegating a particular event to. If omitted, stops delegation of event to all emitters.
stopListening( [ emitter ], [ event ], [ callback ] )

mixed
Stops listening for events. It can be used at different levels:

See source
- To stop listening to a specific callback.
- To stop listening to a specific event.
- To stop listening to all events fired by a specific object.
- To stop listening to all events fired by all objects.
Parameters

[ emitter ] : Emitter

The object to stop listening to. If omitted, stops it for all objects.

[ event ] : String

(Requires the emitter) The name of the event to stop listening to. If omitted, stops it for all events from emitter.

[ callback ] : function

(Requires the event) The function to be removed from the call list for the given event.
unbind( [ unbindProperties ] )

mixed
Removes the binding created with bind.

See source
```
// Removes the binding for the 'a' property.
A.unbind( 'a' );

// Removes bindings for all properties.
A.unbind();
```
Parameters

[ unbindProperties ] : String

Observable properties to be unbound. All the bindings will be released if no properties are provided.
_addEventListener( event, callback, [ options ] = { [options.priority] } )

protected mixed

Adds callback to emitter for given event.

See source

Parameters

event : String

The name of the event.

callback : function

The function to be called on event.

[ options ] : Object

Additional options.

Properties

[ options.priority ] : PriorityString | Number

The priority of this event callback. The higher the priority value the sooner the callback will be fired. Events having the same priority are called in the order they were added.

Defaults to 'normal'

Defaults to {}
_disableRendering( flag )

protected

Disables or enables rendering. If the flag is set to true then the rendering will be disabled. If the flag is set to false and if there was some change in the meantime, then the rendering action will be performed.

See source

Parameters

flag : Boolean

A flag indicates whether the rendering should be disabled.
_removeEventListener( event, callback )

protected mixed

Removes callback from emitter for given event.

See source

Parameters

event : String

The name of the event.

callback : function

The function to stop being called.
_render()

private

Renders all changes. In order to avoid triggering the observers (e.g. selection) all observers are disabled before rendering and re-enabled after that.

See source

Events

change:{property}( eventInfo, name, value, oldValue )

mixed
Fired when a property changed value.

See source
```
observable.set( 'prop', 1 );

observable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {
	console.log( `${ propertyName } has changed from ${ oldValue } to ${ newValue }` );
} );

observable.prop = 2; // -> 'prop has changed from 1 to 2'
```
Parameters

eventInfo : EventInfo

An object containing information about the fired event.

name : String

The property name.

value : *

The new property value.

oldValue : *

The previous property value.
render( eventInfo )
Fired after a topmost change block and all post-fixers are executed.

See source
Actual rendering is performed as a first listener on 'normal' priority.
```
view.on( 'render', () => {
	// Rendering to the DOM is complete.
} );
```
This event is useful when you want to update interface elements after the rendering, e.g. position of the balloon panel. If you wants to change view structure use post-fixers.

Parameters

eventInfo : EventInfo

An object containing information about the fired event.

`set:{property}( eventInfo, name, value, oldValue )`

mixed

Fired when a property value is going to be set but is not set yet (before the change event is fired).

See source

You can control the final value of the property by using the event's return property.

observable.set( 'prop', 1 );

observable.on( 'set:prop', ( evt, propertyName, newValue, oldValue ) => {
	console.log( `Value is going to be changed from ${ oldValue } to ${ newValue }` );
	console.log( `Current property value is ${ observable[ propertyName ] }` );

	// Let's override the value.
	evt.return = 3;
} );

observable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {
	console.log( `Value has changed from ${ oldValue } to ${ newValue }` );
} );

observable.prop = 2; // -> 'Value is going to be changed from 1 to 2'
                     // -> 'Current property value is 1'
                     // -> 'Value has changed from 1 to 3'

Note: The event is fired even when the new value is the same as the old value.

Parameters

eventInfo : EventInfo: An object containing information about the fired event.
name : String: The property name.
value : *: The new property value.
oldValue : *: The previous property value.

Every day, we work hard to keep our documentation complete. Have you spotted an outdated information? Is something missing? Please report it via our issue tracker.

View (engine/view)

Filtering

Properties

document : Documentmodule:engine/view/view~View#document

domConverter : DomConvertermodule:engine/view/view~View#domConverter

domRoots : Map.<String, HTMLElement>module:engine/view/view~View#domRoots

hasDomSelection : Booleanmodule:engine/view/view~View#hasDomSelection

isRenderingInProgress : Booleanmodule:engine/view/view~View#isRenderingInProgress

_renderer : Renderermodule:engine/view/view~View#_renderer

_hasChangedSinceTheLastRendering : Booleanmodule:engine/view/view~View#_hasChangedSinceTheLastRendering

_initialDomRootAttributes : WeakMap.<HTMLElement, Object>module:engine/view/view~View#_initialDomRootAttributes

_observers : Map.<Function, Observer>module:engine/view/view~View#_observers

_ongoingChange : Booleanmodule:engine/view/view~View#_ongoingChange

_postFixersInProgress : Booleanmodule:engine/view/view~View#_postFixersInProgress

_renderingDisabled : Booleanmodule:engine/view/view~View#_renderingDisabled

_writer : DowncastWritermodule:engine/view/view~View#_writer

Methods

constructor( stylesProcessor )module:engine/view/view~View#constructor

Parameters

addObserver( Observer ) → Observermodule:engine/view/view~View#addObserver

Parameters

Returns

attachDomRoot( domRoot, [ name ] )module:engine/view/view~View#attachDomRoot

Parameters

bind( bindProperties ) → Objectmodule:engine/view/view~View#bind

Parameters

Returns

change( callback ) → *module:engine/view/view~View#change

Parameters

Returns

createPositionAfter( item ) → Positionmodule:engine/view/view~View#createPositionAfter

Parameters

Returns

createPositionAt( itemOrPosition, [ offset ] )module:engine/view/view~View#createPositionAt

Parameters

createPositionBefore( item ) → Positionmodule:engine/view/view~View#createPositionBefore

Parameters

Returns

createRange( start, [ end ] ) → Rangemodule:engine/view/view~View#createRange

Parameters

Returns

createRangeIn( element ) → Rangemodule:engine/view/view~View#createRangeIn

Parameters

Returns

createRangeOn( item ) → Rangemodule:engine/view/view~View#createRangeOn

Parameters

Returns

createSelection( [ selectable ], [ placeOrOffset ], [ options ] = { [options.backward], [options.fake], [options.label] } ) → Selectionmodule:engine/view/view~View#createSelection

Parameters

Returns

decorate( methodName )module:engine/view/view~View#decorate

Parameters

delegate( events ) → EmitterMixinDelegateChainmodule:engine/view/view~View#delegate

Parameters

Returns

destroy()module:engine/view/view~View#destroy

detachDomRoot( name )module:engine/view/view~View#detachDomRoot

Parameters

disableObservers()module:engine/view/view~View#disableObservers

enableObservers()module:engine/view/view~View#enableObservers

fire( eventOrInfo, [ args ] ) → *module:engine/view/view~View#fire

Parameters

Returns

focus()module:engine/view/view~View#focus

forceRender()module:engine/view/view~View#forceRender

getDomRoot( [ name ] ) → Elementmodule:engine/view/view~View#getDomRoot

Parameters

Returns

getObserver( Observer ) → Observer | undefinedmodule:engine/view/view~View#getObserver

Parameters

Returns

listenTo( emitter, event, callback, [ options ] = { [options.priority] } )module:engine/view/view~View#listenTo

Parameters

off( event, callback )module:engine/view/view~View#off

Parameters

on( event, callback, [ options ] = { [options.priority] } )module:engine/view/view~View#on

Parameters

once( event, callback, [ options ] = { [options.priority] } )module:engine/view/view~View#once

Parameters

scrollToTheSelection()module:engine/view/view~View#scrollToTheSelection

`document : Document`

`domConverter : DomConverter`

`domRoots : Map.<String, HTMLElement>`

`hasDomSelection : Boolean`

`isRenderingInProgress : Boolean`

`_renderer : Renderer`

`_hasChangedSinceTheLastRendering : Boolean`

`_initialDomRootAttributes : WeakMap.<HTMLElement, Object>`

`_observers : Map.<Function, Observer>`

`_ongoingChange : Boolean`

`_postFixersInProgress : Boolean`

`_renderingDisabled : Boolean`

`_writer : DowncastWriter`

`constructor( stylesProcessor )`

`addObserver( Observer ) → Observer`

`attachDomRoot( domRoot, [ name ] )`

`bind( bindProperties ) → Object`

`change( callback ) → *`

`createPositionAfter( item ) → Position`

`createPositionAt( itemOrPosition, [ offset ] )`

`createPositionBefore( item ) → Position`

`createRange( start, [ end ] ) → Range`

`createRangeIn( element ) → Range`

`createRangeOn( item ) → Range`

`createSelection( [ selectable ], [ placeOrOffset ], [ options ] = { [options.backward], [options.fake], [options.label] } ) → Selection`

`decorate( methodName )`

`delegate( events ) → EmitterMixinDelegateChain`

`destroy()`

`detachDomRoot( name )`

`disableObservers()`

`enableObservers()`

`fire( eventOrInfo, [ args ] ) → *`

`focus()`

`forceRender()`

`getDomRoot( [ name ] ) → Element`

`getObserver( Observer ) → Observer | undefined`

`listenTo( emitter, event, callback, [ options ] = { [options.priority] } )`

`off( event, callback )`

`on( event, callback, [ options ] = { [options.priority] } )`

`once( event, callback, [ options ] = { [options.priority] } )`

`scrollToTheSelection()`

`set( name, [ value ] )`

`stopDelegating( [ event ], [ emitter ] )`

`stopListening( [ emitter ], [ event ], [ callback ] )`

`unbind( [ unbindProperties ] )`

`_addEventListener( event, callback, [ options ] = { [options.priority] } )`

`_disableRendering( flag )`

`_removeEventListener( event, callback )`

`_render()`

`change:{property}( eventInfo, name, value, oldValue )`

`render( eventInfo )`

`set:{property}( eventInfo, name, value, oldValue )`