ViewDocumentFragment

Number of child nodes in this document fragment.

The document to which this document fragment belongs.

Artificial element getFillerOffset. Returns undefined. Added for compatibility reasons.

Is true if there are no nodes inside this document fragment, false otherwise.

Artificial element name. Returns undefined. Added for compatibility reasons.

Artificial parent of DocumentFragment. Returns null. Added for compatibility reasons.

Artificial root of DocumentFragment. Returns itself. Added for compatibility reasons.

Array of child nodes.

Map of custom properties. Custom properties can be added to document fragment instance.

Creates new DocumentFragment instance.

Parameters

document : ViewDocument

The document to which this document fragment belongs.

[ children ] : ViewNode | Iterable<ViewNode>

A list of nodes to be inserted into the created document fragment.

Iterable interface.

Iterates over nodes added to this document fragment.

Returns

Iterator<ViewNode>

Delegates selected events to another Emitter. For instance:

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 : Array<string>

Event names that will be delegated to another emitter.

Returns

EmitterMixinDelegateChain

Fires an event, executing all callbacks registered for it.

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

Type parameters

TEvent : extends BaseEvent

The type describing the event. See BaseEvent.

Parameters

eventOrInfo : GetNameOrEventInfo<TEvent>

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

args : TEvent[ 'args' ]

Additional arguments to be passed to the callbacks.

Returns

GetEventInfo<TEvent>[ 'return' ]

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).

Gets child at the given index.

Parameters

index : number

Index of child.

Returns

ViewNode

Child node.

Gets index of the given child node. Returns -1 if child node is not found.

Parameters

node : ViewNode

Child node.

Returns

number

Index of the child node.

Gets child nodes iterator.

Returns

IterableIterator<ViewNode>

Child nodes iterator.

Returns an iterator which iterates over this document fragment's custom properties. Iterator provides [ key, value ] pairs for each stored property.

Returns

Iterable<tuple>

Returns the custom property value for the given key.

Parameters

key : string | symbol

Returns

unknown

Checks whether this object is of type ViewElement or its subclass.

element.is( 'element' ); // -> true
element.is( 'node' ); // -> true
element.is( 'view:element' ); // -> true
element.is( 'view:node' ); // -> true

element.is( 'model:element' ); // -> false
element.is( 'documentSelection' ); // -> false

Assuming that the object being checked is an element, you can also check its name:

element.is( 'element', 'img' ); // -> true if this is an <img> element
text.is( 'element', 'img' ); -> false

Parameters

type : 'element' | 'view:element'

Returns

this is ViewElement | ViewAttributeElement | ViewContainerElement | ViewEditableElement | ViewEmptyElement | ViewRawElement | ViewRootEditableElement | ViewUIElement

Checks whether this object is of type ViewAttributeElement.

attributeElement.is( 'attributeElement' ); // -> true
attributeElement.is( 'element' ); // -> true
attributeElement.is( 'node' ); // -> true
attributeElement.is( 'view:attributeElement' ); // -> true
attributeElement.is( 'view:element' ); // -> true
attributeElement.is( 'view:node' ); // -> true

attributeElement.is( 'model:element' ); // -> false
attributeElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is an attribute element, you can also check its name:

attributeElement.is( 'element', 'b' ); // -> true if this is a bold element
attributeElement.is( 'attributeElement', 'b' ); // -> same as above
text.is( 'element', 'b' ); -> false

Parameters

type : 'attributeElement' | 'view:attributeElement'

Returns

this is ViewAttributeElement

Checks whether this object is of type ViewEditableElement or its subclass.

editableElement.is( 'editableElement' ); // -> true
editableElement.is( 'element' ); // -> true
editableElement.is( 'node' ); // -> true
editableElement.is( 'view:editableElement' ); // -> true
editableElement.is( 'view:element' ); // -> true
editableElement.is( 'view:node' ); // -> true

editableElement.is( 'model:element' ); // -> false
editableElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is an editbale element, you can also check its name:

editableElement.is( 'element', 'div' ); // -> true if this is a div element
editableElement.is( 'editableElement', 'div' ); // -> same as above
text.is( 'element', 'div' ); -> false

Parameters

type : 'editableElement' | 'view:editableElement'

Returns

this is ViewEditableElement | ViewRootEditableElement

Checks whether this object is of type ViewContainerElement or its subclass.

containerElement.is( 'containerElement' ); // -> true
containerElement.is( 'element' ); // -> true
containerElement.is( 'node' ); // -> true
containerElement.is( 'view:containerElement' ); // -> true
containerElement.is( 'view:element' ); // -> true
containerElement.is( 'view:node' ); // -> true

containerElement.is( 'model:element' ); // -> false
containerElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is a container element, you can also check its name:

containerElement.is( 'element', 'div' ); // -> true if this is a div container element
containerElement.is( 'contaienrElement', 'div' ); // -> same as above
text.is( 'element', 'div' ); -> false

Parameters

type : 'containerElement' | 'view:containerElement'

Returns

this is ViewContainerElement | ViewEditableElement | ViewRootEditableElement

Checks whether this object is of type ViewRawElement.

rawElement.is( 'rawElement' ); // -> true
rawElement.is( 'element' ); // -> true
rawElement.is( 'node' ); // -> true
rawElement.is( 'view:rawElement' ); // -> true
rawElement.is( 'view:element' ); // -> true
rawElement.is( 'view:node' ); // -> true

rawElement.is( 'model:element' ); // -> false
rawElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is a raw element, you can also check its name:

rawElement.is( 'img' ); // -> true if this is an img element
rawElement.is( 'rawElement', 'img' ); // -> same as above
text.is( 'img' ); -> false

Parameters

type : 'rawElement' | 'view:rawElement'

Returns

this is ViewRawElement

hecks whether this object is of type ViewDocumentFragment.

docFrag.is( 'documentFragment' ); // -> true
docFrag.is( 'view:documentFragment' ); // -> true

docFrag.is( 'model:documentFragment' ); // -> false
docFrag.is( 'element' ); // -> false
docFrag.is( 'node' ); // -> false

Parameters

type : 'documentFragment' | 'view:documentFragment'

Returns

this is ViewDocumentFragment

Checks whether this object is of type ViewRange.

range.is( 'range' ); // -> true
range.is( 'view:range' ); // -> true

range.is( 'model:range' ); // -> false
range.is( 'element' ); // -> false
range.is( 'selection' ); // -> false

Parameters

type : 'range' | 'view:range'

Returns

this is ViewRange

Checks whether this object is of type ViewPosition.

position.is( 'position' ); // -> true
position.is( 'view:position' ); // -> true

position.is( 'model:position' ); // -> false
position.is( 'element' ); // -> false
position.is( 'range' ); // -> false

Parameters

type : 'position' | 'view:position'

Returns

this is ViewPosition

Checks whether this object is of type ViewTextProxy.

textProxy.is( '$textProxy' ); // -> true
textProxy.is( 'view:$textProxy' ); // -> true

textProxy.is( 'model:$textProxy' ); // -> false
textProxy.is( 'element' ); // -> false
textProxy.is( 'range' ); // -> false

Note: Until version 20.0.0 this method wasn't accepting '$textProxy' type. The legacy 'textProxy' type is still accepted for backward compatibility.

Parameters

type : '$textProxy' | 'view:$textProxy'

Returns

this is ViewTextProxy

Checks whether this object is of type ViewText.

text.is( '$text' ); // -> true
text.is( 'node' ); // -> true
text.is( 'view:$text' ); // -> true
text.is( 'view:node' ); // -> true

text.is( 'model:$text' ); // -> false
text.is( 'element' ); // -> false
text.is( 'range' ); // -> false

Parameters

type : '$text' | 'view:$text'

Returns

this is ViewText

Checks whether this object is of type ViewUIElement.

uiElement.is( 'uiElement' ); // -> true
uiElement.is( 'element' ); // -> true
uiElement.is( 'node' ); // -> true
uiElement.is( 'view:uiElement' ); // -> true
uiElement.is( 'view:element' ); // -> true
uiElement.is( 'view:node' ); // -> true

uiElement.is( 'model:element' ); // -> false
uiElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is an ui element, you can also check its name:

uiElement.is( 'element', 'span' ); // -> true if this is a span ui element
uiElement.is( 'uiElement', 'span' ); // -> same as above
text.is( 'element', 'span' ); -> false

Parameters

type : 'uiElement' | 'view:uiElement'

Returns

this is ViewUIElement

Checks whether this object is of type ViewRootEditableElement.

rootEditableElement.is( 'rootElement' ); // -> true
rootEditableElement.is( 'editableElement' ); // -> true
rootEditableElement.is( 'element' ); // -> true
rootEditableElement.is( 'node' ); // -> true
rootEditableElement.is( 'view:editableElement' ); // -> true
rootEditableElement.is( 'view:element' ); // -> true
rootEditableElement.is( 'view:node' ); // -> true

rootEditableElement.is( 'model:element' ); // -> false
rootEditableElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is a root editable element, you can also check its name:

rootEditableElement.is( 'element', 'div' ); // -> true if this is a div root editable element
rootEditableElement.is( 'rootElement', 'div' ); // -> same as above
text.is( 'element', 'div' ); -> false

Parameters

type : 'rootElement' | 'view:rootElement'

Returns

this is ViewRootEditableElement

Checks whether this object is of type ViewEmptyElement.

emptyElement.is( 'emptyElement' ); // -> true
emptyElement.is( 'element' ); // -> true
emptyElement.is( 'node' ); // -> true
emptyElement.is( 'view:emptyElement' ); // -> true
emptyElement.is( 'view:element' ); // -> true
emptyElement.is( 'view:node' ); // -> true

emptyElement.is( 'model:element' ); // -> false
emptyElement.is( 'documentFragment' ); // -> false

Assuming that the object being checked is an empty element, you can also check its name:

emptyElement.is( 'element', 'img' ); // -> true if this is a img element
emptyElement.is( 'emptyElement', 'img' ); // -> same as above
text.is( 'element', 'img' ); -> false

Parameters

type : 'emptyElement' | 'view:emptyElement'

Returns

this is ViewEmptyElement

Checks whether this object is of type ViewSelection or ViewDocumentSelection.

selection.is( 'selection' ); // -> true
selection.is( 'view:selection' ); // -> true

selection.is( 'model:selection' ); // -> false
selection.is( 'element' ); // -> false
selection.is( 'range' ); // -> false

Parameters

type : 'selection' | 'view:selection'

Returns

this is ViewSelection | ViewDocumentSelection

Checks whether the object is of type ViewElement or its subclass and has the specified name.

Type parameters

N : extends string

Parameters

type : 'element' | 'view:element'

name : N

Returns

boolean

Checks whether the object is of type ViewContainerElement or its subclass and has the specified name.

Type parameters

N : extends string

Parameters

type : 'containerElement' | 'view:containerElement'

name : N

Returns

boolean

Checks whether the object is of type ViewEmptyElement has the specified name.

Type parameters

N : extends string

Parameters

type : 'emptyElement' | 'view:emptyElement'

name : N

Returns

boolean

Checks whether the object is of type ViewRootEditableElement and has the specified name.

Type parameters

N : extends string

Parameters

type : 'rootElement' | 'view:rootElement'

name : N

Returns

boolean

Checks whether the object is of type ViewUIElement and has the specified name.

Type parameters

N : extends string

Parameters

type : 'uiElement' | 'view:uiElement'

name : N

Returns

boolean

Checks whether the object is of type ViewRawElement and has the specified name.

Type parameters

N : extends string

Parameters

type : 'rawElement' | 'view:rawElement'

name : N

Returns

boolean

Checks whether the object is of type ViewEditableElement or its subclass and has the specified name.

Type parameters

N : extends string

Parameters

type : 'editableElement' | 'view:editableElement'

name : N

Returns

boolean

Checks whether the object is of type ViewAttributeElement and has the specified name.

Type parameters

N : extends string

Parameters

type : 'attributeElement' | 'view:attributeElement'

name : N

Returns

boolean

Checks whether this object is of type ViewDocumentSelection.

`docSelection.is( 'selection' ); // -> true
docSelection.is( 'documentSelection' ); // -> true
docSelection.is( 'view:selection' ); // -> true
docSelection.is( 'view:documentSelection' ); // -> true

docSelection.is( 'model:documentSelection' ); // -> false
docSelection.is( 'element' ); // -> false
docSelection.is( 'node' ); // -> false

Parameters

type : 'documentSelection' | 'view:documentSelection'

Returns

this is ViewDocumentSelection

Checks whether this object is of type ViewNode or its subclass.

This method is useful when processing view objects that are of unknown type. For example, a function may return a ViewDocumentFragment or a ViewNode that can be either a text node or an element. This method can be used to check what kind of object is returned.

someObject.is( 'element' ); // -> true if this is an element
someObject.is( 'node' ); // -> true if this is a node (a text node or an element)
someObject.is( 'documentFragment' ); // -> true if this is a document fragment

Since this method is also available on a range of model objects, you can prefix the type of the object with model: or view: to check, for example, if this is the model's or view's element:

viewElement.is( 'view:element' ); // -> true
viewElement.is( 'model:element' ); // -> false

By using this method it is also possible to check a name of an element:

imgElement.is( 'element', 'img' ); // -> true
imgElement.is( 'view:element', 'img' ); // -> same as above, but more precise

Parameters

type : 'node' | 'view:node'

Returns

this is ViewText | ViewNode | ViewElement | ViewAttributeElement | ViewContainerElement | ViewEditableElement | ViewEmptyElement | ViewRawElement | ViewRootEditableElement | ViewUIElement

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

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.

Type parameters

TEvent : extends BaseEvent

The type describing the event. See BaseEvent.

Parameters

emitter : Emitter

The object that fires the event.

event : TEvent[ 'name' ]

The name of the event.

callback : GetCallback<TEvent>

The function to be called on event.

[ options ] : GetCallbackOptions<TEvent>

Additional options.

Returns

void

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

Parameters

event : string

The name of the event.

callback : Function

The function to stop being called.

Returns

void

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

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

Type parameters

TEvent : extends BaseEvent

The type descibing the event. See BaseEvent.

Parameters

event : TEvent[ 'name' ]

The name of the event.

callback : GetCallback<TEvent>

The function to be called on event.

[ options ] : GetCallbackOptions<TEvent>

Additional options.

Returns

void

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.

Type parameters

TEvent : extends BaseEvent

The type descibing the event. See BaseEvent.

Parameters

event : TEvent[ 'name' ]

The name of the event.

callback : GetCallback<TEvent>

The function to be called on event.

[ options ] : GetCallbackOptions<TEvent>

Additional options.

Returns

void

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

• 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.

Returns

void

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

• 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.

Returns

void

Converts ViewDocumentFragment instance to plain object and returns it. Takes care of converting all of this document fragment's children.

Returns

unknown

ViewDocumentFragment instance converted to plain object.

Insert a child node or a list of child nodes at the end and sets the parent of these nodes to this fragment.

Parameters

items : string | ViewItem | Iterable<( string | ViewItem )>

Items to be inserted.

Returns

number

Number of appended nodes.

Parameters

type : ViewDocumentChangeType

Type of the change.

node : ViewNode | ViewDocumentFragment

Changed node.

[ data ] : object

Additional data.

Properties

data.index : number

Returns

void

Fires

• change

Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to this fragment.

Parameters

index : number

Position where nodes should be inserted.

items : string | ViewItem | Iterable<( string | ViewItem )>

Items to be inserted.

Returns

number

Number of inserted nodes.

Removes number of child nodes starting at the given index and set the parent of these nodes to null.

Parameters

index : number

Number of the first node to remove.

howMany : number

Number of nodes to remove.

Defaults to 1

Returns

Array<ViewNode>

The array of removed nodes.

Removes the custom property stored under the given key.

Parameters

key : string | symbol

Returns

boolean

Returns true if property was removed.

Related:

• ViewDowncastWriter#removeCustomProperty

Sets a custom property. They can be used to add special data to elements.

Parameters

key : string | symbol

value : unknown

Returns

void

Related:

• ViewDowncastWriter#setCustomProperty