EditableElement (engine/view)
@ckeditor/ckeditor5-engine/src/view/editableelement
Editable element which can be a root or nested editable area in the editor.
Editable is automatically read-only when its Document is read-only.
Filtering
Properties
-
childCount : Number
readonly inherited
Number of element's children.
-
document
readonly
Returns document associated with the editable.
Overrides: ContainerElement#document -
index : Number | null
readonly inherited
Index of the node in the parent element or null if the node has no parent.
Accessing this property throws an error if this node's parent element does not contain it. This means that view tree got broken.
-
isEmpty : Boolean
readonly inherited
Is
true
if there are no nodes inside this element,false
otherwise. -
isFocused : Boolean
readonly observable
Whether the editable is focused.
This property updates when document.isFocused or view selection is changed.
-
isReadOnly : Boolean
Whether the editable is in read-write or read-only mode.
-
name : String
readonly inherited
Name of the element.
-
nextSibling : Node | null
readonly inherited
Node's next sibling, or
null
if it is the last child. -
parent : Element | DocumentFragment | null
readonly inherited
Parent element. Null by default. Set by
_insertChild
. -
previousSibling : Node | null
readonly inherited
Node's previous sibling, or
null
if it is the first child. -
root : Node | DocumentFragment
readonly inherited
Top-most ancestor of the node. If the node has no parent it is the root itself.
-
_attrs : Map
protected inherited
Map of attributes, where attributes names are keys and attributes values are values.
-
Array of child nodes.
-
_classes : Set
protected inherited
Set of classes associated with element instance.
-
_customProperties
protected inherited
Map of custom properties. Custom properties can be added to element instance, will be cloned but not rendered into DOM.
-
_document
protected
Sets document of this editable element.
-
_styles : Set
protected inherited
Map of styles.
Methods
-
constructor()
protected
Creates an editable element.
Overrides: ContainerElement#constructor -
_fireChange( type, node )
inherited
-
_removeChildren( index, [ howMany ] ) → Array.<Node>
inherited
-
_removeClass( className )
inherited
Removes specified class.
element._removeClass( 'foo' ); // Removes 'foo' class. element._removeClass( [ 'foo', 'bar' ] ); // Removes both 'foo' and 'bar' classes.
Parameters
className : Array.<String> | String
Fires
-
bind( bindProperties ) → Object
Binds observable properties to another objects implementing
Observable
interface (likeModel
).Once bound, the observable will immediately share the current state of properties of the observable it is bound to and react to the changes to these properties in the future.
Note: To release the binding use
unbind
.Using
bind().to()
chain:A.bind( 'a' ).to( B ); A.bind( 'a' ).to( B, 'b' ); A.bind( 'a', 'b' ).to( B, 'c', 'd' ); A.bind( 'a' ).to( B, 'b', C, 'd', ( b, d ) => b + d );
It is also possible to bind to the same property in a observables collection using
bind().toMany()
chain:A.bind( 'a' ).toMany( [ B, C, D ], 'x', ( a, b, c ) => a + b + c ); A.bind( 'a' ).toMany( [ B, C, D ], 'x', ( ...x ) => x.every( x => x ) );
Parameters
bindProperties : String
Observable properties that will be bound to another observable(s).
Returns
Object
The bind chain with the
to()
andtoMany()
methods.
-
decorate( methodName )
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.
This is a very simplified method decoration. Itself it doesn't change the behavior of a method (expect adding the event), but it allows to modify it later on by listening to the method's event.
For example, in order to cancel the method execution one can stop the event:
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: we used a high priority listener here to execute this callback before the one which calls the original method (which used the default priority).
It's also possible to change the return value:
foo.on( 'method', ( evt ) => { evt.return = 'Foo!'; } ); foo.method(); // -> 'Foo'
Finally, it's possible to access and modify the parameters:
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
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
andemitterC
along withdata
:emitterA.fire( 'eventX', data );
and
eventY
is delegated (fired by)emitterC
along withdata
:emitterA.fire( 'eventY', data );
Parameters
events : String
Event names that will be delegated to another emitter.
Returns
-
findAncestor( patterns ) → Element | null
inherited
Returns ancestor element that match specified pattern. Provided patterns should be compatible with Matcher as it is used internally.
-
fire( eventOrInfo, [ args ] ) → *
Fires an event, executing all callbacks registered for it.
The first parameter passed to callbacks is an
EventInfo
object, followed by the optionalargs
provided in thefire()
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 theevt.return
's property (the event info is the first param of every callback).
-
getAncestors( options = { [options.includeSelf], [options.parentFirst] } ) → Array
inherited
Returns ancestors array of this node.
Parameters
options : Object
Options object.
Properties[ options.includeSelf ] : Boolean
When set to
true
this node will be also included in parent's array.Defaults to
false
[ options.parentFirst ] : Boolean
When set to
true
, array will be sorted from node's parent to root element, otherwise root element will be the first item in the array.Defaults to
false
Returns
Array
Array with ancestors.
-
getAttribute( key ) → String | undefined
inherited
Gets attribute by key. If attribute is not present - returns undefined.
Parameters
key : String
Attribute key.
Returns
String | undefined
Attribute value.
-
getAttributeKeys() → Iterable.<String>
inherited
Returns an iterator that contains the keys for attributes. Order of inserting attributes is not preserved.
Returns
Iterable.<String>
Keys for attributes.
-
getAttributes() → Iterable.<*>
inherited
Returns iterator that iterates over this element's attributes.
Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value. This format is accepted by native
Map
object and also can be passed inNode
constructor.Returns
Iterable.<*>
-
Gets child at the given index.
-
getChildIndex( node ) → Number
inherited
Gets index of the given child node. Returns
-1
if child node is not found. -
getChildren() → Iterable.<Node>
inherited
Gets child nodes iterator.
Returns
Iterable.<Node>
Child nodes iterator.
-
getClassNames() → Iterable.<String>
inherited
Returns iterator that contains all class names.
Returns
Iterable.<String>
-
getCommonAncestor( node, options = { [options.includeSelf] } ) → Element | DocumentFragment | null
inherited
Returns a
Element
orDocumentFragment
which is a common ancestor of both nodes.Parameters
node : Node
The second node.
options : Object
Options object.
Properties[ options.includeSelf ] : Boolean
When set to
true
both nodes will be considered "ancestors" too. Which means that if e.g. node A is inside B, then their common ancestor will be B.Defaults to
false
Returns
Element | DocumentFragment | null
-
getCustomProperties() → Iterable.<*>
inherited
Returns an iterator which iterates over this element's custom properties. Iterator provides
[ key, value ]
pairs for each stored property.Returns
Iterable.<*>
-
getCustomProperty( key ) → *
inherited
Returns the custom property value for the given key.
Parameters
key : String | Symbol
Returns
*
-
getFillerOffset() → Number | null
inherited
Returns block filler offset or
null
if block filler is not needed.Returns
Number | null
Block filler offset or
null
if block filler is not needed.
-
getIdentity() → String
inherited
Returns identity string based on element's name, styles, classes and other attributes. Two elements that are similar will have same identity string. It has the following format:
'name class="class1,class2" style="style1:value1;style2:value2" attr1="val1" attr2="val2"'
For example:
const element = writer.createContainerElement( 'foo', { banana: '10', apple: '20', style: 'color: red; border-color: white;', class: 'baz' } ); // returns 'foo class="baz" style="border-color:white;color:red" apple="20" banana="10"' element.getIdentity();
NOTE: Classes, styles and other attributes are sorted alphabetically.
Returns
String
-
getPath() → Array.<Number>
inherited
Gets a path to the node. The path is an array containing indices of consecutive ancestors of this node, beginning from root, down to this node's index.
const abc = new Text( 'abc' ); const foo = new Text( 'foo' ); const h1 = new Element( 'h1', null, new Text( 'header' ) ); const p = new Element( 'p', null, [ abc, foo ] ); const div = new Element( 'div', null, [ h1, p ] ); foo.getPath(); // Returns [ 1, 3 ]. `foo` is in `p` which is in `div`. `p` starts at offset 1, while `foo` at 3. h1.getPath(); // Returns [ 0 ]. div.getPath(); // Returns [].
Returns
Array.<Number>
The path.
-
getStyle( property ) → String | undefined
inherited
Returns style value for given property. Undefined is returned if style does not exist.
Parameters
property : String
Returns
String | undefined
-
getStyleNames() → Iterable.<String>
inherited
Returns iterator that contains all style names.
Returns
Iterable.<String>
-
hasAttribute( key ) → Boolean
inherited
Returns a boolean indicating whether an attribute with the specified key exists in the element.
Parameters
key : String
Attribute key.
Returns
Boolean
true
if attribute with the specified key exists in the element, false otherwise.
-
hasClass( className )
inherited
Returns true if class is present. If more then one class is provided - returns true only when all classes are present.
element.hasClass( 'foo' ); // Returns true if 'foo' class is present. element.hasClass( 'foo', 'bar' ); // Returns true if 'foo' and 'bar' classes are both present.
Parameters
className : String
-
hasStyle( property )
inherited
Returns true if style keys are present. If more then one style property is provided - returns true only when all properties are present.
element.hasStyle( 'color' ); // Returns true if 'border-top' style is present. element.hasStyle( 'color', 'border-top' ); // Returns true if 'color' and 'border-top' styles are both present.
Parameters
property : String
-
is( type, [ name ] ) → Boolean
inherited
Checks whether given view tree object is of given type.
-
isAfter( node ) → Boolean
inherited
Returns whether this node is after given node.
false
is returned if nodes are in different trees (for example, in differentDocumentFragment
s). -
isBefore( node ) → Boolean
inherited
Returns whether this node is before given node.
false
is returned if nodes are in different trees (for example, in differentDocumentFragment
s). -
isSimilar( otherElement ) → Boolean
inherited
Checks if this element is similar to other element. Both elements should have the same name and attributes to be considered as similar. Two similar elements can contain different set of children nodes.
-
listenTo( emitter, event, callback, [ options ] = { [options.priority] } )
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.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 )
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.
-
on( event, callback, [ options ] = { [options.priority] } )
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).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] } )
Registers a callback function to be executed on the next time the event is fired only. This is similar to calling
on
followed byoff
in the callback.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
{}
-
set( name, [ value ] )
Creates and sets the value of an observable property of this object. Such an property becomes a part of the state and is be observable.
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 have a property with the given property name. This prevents from mistakenly overriding existing properties and methods, but means thatfoo.set( 'bar', 1 )
may be slightly slower thanfoo.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 ] )
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 ofevent
to all emitters.
-
stopListening( [ emitter ], [ event ], [ callback ] )
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 fromemitter
.[ callback ] : function
(Requires the
event
) The function to be removed from the call list for the givenevent
.
-
toJSON() → Object
inherited
Custom toJSON method to solve child-parent circular dependencies.
Returns
Object
Clone of this object with the parent property removed.
-
unbind( [ unbindProperties ] )
Removes the binding created with
bind
.A.unbind( 'a' ); A.unbind();
Parameters
[ unbindProperties ] : String
Observable properties to be unbound. All the bindings will be released if no properties provided.
-
_addClass( className )
protected inherited
Adds specified class.
element._addClass( 'foo' ); // Adds 'foo' class. element._addClass( [ 'foo', 'bar' ] ); // Adds 'foo' and 'bar' classes.
Parameters
className : Array.<String> | String
Fires
-
_appendChild( items ) → Number
protected inherited
-
Clones provided element.
Parameters
[ deep ] : Boolean
If set to
true
clones element and all its children recursively. When set tofalse
, element will be cloned without any children.Defaults to
false
Returns
Element
Clone of this element.
-
_insertChild( index, items ) → Number
protected inherited
-
_remove()
protected inherited
Removes node from parent.
-
_removeAttribute( key ) → Boolean
protected inherited
Removes attribute from the element.
Parameters
key : String
Attribute key.
Returns
Boolean
Returns true if an attribute existed and has been removed.
Fires
-
_removeCustomProperty( key ) → Boolean
protected inherited
Removes the custom property stored under the given key.
Parameters
key : String | Symbol
Returns
Boolean
Returns true if property was removed.
-
_removeStyle( property )
protected inherited
Removes specified style.
element._removeStyle( 'color' ); // Removes 'color' style. element._removeStyle( [ 'color', 'border-top' ] ); // Removes both 'color' and 'border-top' styles.
Parameters
property : Array.<String> | String
Fires
-
_setAttribute( key, value )
protected inherited
Adds or overwrite attribute with a specified key and value.
-
_setCustomProperty( key, value )
protected inherited
Sets a custom property. Unlike attributes, custom properties are not rendered to the DOM, so they can be used to add special data to elements.
Parameters
key : String | Symbol
value : *
-
_setStyle( property, [ value ] )
protected inherited
Adds style to the element.
element._setStyle( 'color', 'red' ); element._setStyle( { color: 'red', position: 'fixed' } );
Parameters
property : String | Object
Property name or object with key - value pairs.
[ value ] : String
Value to set. This parameter is ignored if object is provided as the first parameter.
Fires
Events
-
change( eventInfo )
inherited
Parameters
eventInfo : EventInfo
An object containing information about the fired event.
-
change:attributes( eventInfo, changedNode )
inherited
-
change:children( eventInfo, changedNode )
inherited
-
change:isFocused( eventInfo, name, value, oldValue )
Fired when the
isFocused
property changed value.Parameters
eventInfo : EventInfo
An object containing information about the fired event.
name : String
Name of the changed property (
isFocused
).value : Boolean
New value of the
isFocused
property with given key ornull
, if operation should remove property.oldValue : Boolean
Old value of the
isFocused
property with given key ornull
, if property was not set before.
-
change:isReadOnly( eventInfo, name, value, oldValue )
Fired when the
isReadOnly
property changed value.Parameters
eventInfo : EventInfo
An object containing information about the fired event.
name : String
Name of the changed property (
isReadOnly
).value : Boolean
New value of the
isReadOnly
property with given key ornull
, if operation should remove property.oldValue : Boolean
Old value of the
isReadOnly
property with given key ornull
, if property was not set before.
-
change:text( eventInfo, changedNode )
inherited
Fired when text nodes data changes.
-
change:{property}( eventInfo, name, value, oldValue )
Fired when a property changed value.
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.
-
set:{property}( eventInfo, name, value, oldValue )
Fired when a property value is going to be set but is not set yet (before the
change
event is fired).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: 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.