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ClipboardMarkersUtils

Api-class icon class

Part of the clipboard logic. Responsible for collecting markers from selected fragments and restoring them with proper positions in pasted elements.

Properties

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    editor : Editor
    readonlyinherited

    The editor instance.

    Note that most editors implement the ui property. However, editors with an external UI (i.e. Bootstrap-based) or a headless editor may not have this property or throw an error when accessing it.

    Because of above, to make plugins more universal, it is recommended to split features into:

    • The "editing" part that uses the Editor class without ui property.
    • The "UI" part that uses the Editor class and accesses ui property.
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    isEnabled : boolean
    readonlyinherited Eye icon observable

    Flag indicating whether a plugin is enabled or disabled. A disabled plugin will not transform text.

    Plugin can be simply disabled like that:

    // Disable the plugin so that no toolbars are visible.
    editor.plugins.get( 'TextTransformation' ).isEnabled = false;
    
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    You can also use forceDisabled method.

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    Map of marker names that can be copied.

Static properties

Methods

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    constructor( editor )
    inherited

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    _hasMarkerConfiguration( markerName ) → boolean

    Checks if marker has any clipboard copy behavior configuration.

    Parameters

    markerName : string

    Name of checked marker.

    Returns

    boolean
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    bind( bindProperty1, bindProperty2 ) → ObservableDualBindChain<K1, ClipboardMarkersUtils[ K1 ], K2, ClipboardMarkersUtils[ K2 ]>
    inherited

    Binds observable properties to other objects implementing the Observable interface.

    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' );
    
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    or even shorter:

    button.bind( 'isEnabled' ).to( command );
    
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    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' );
    
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    It is possible to bind more than one property at a time to shorten the code:

    button.bind( 'isEnabled', 'value' ).to( command );
    
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    which corresponds to:

    button.bind( 'isEnabled' ).to( command );
    button.bind( 'value' ).to( command );
    
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    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 );
    
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    Using a custom callback allows processing the value before passing it to the target property:

    button.bind( 'isEnabled' ).to( command, 'value', value => value === 'heading1' );
    
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    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 );
    
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    Type parameters

    K1
    K2

    Parameters

    bindProperty1 : K1

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

    bindProperty2 : K2

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

    Returns

    ObservableDualBindChain<K1, ClipboardMarkersUtils[ K1 ], K2, ClipboardMarkersUtils[ K2 ]>

    The bind chain with the to() and toMany() methods.

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    bind( bindProperties ) → ObservableMultiBindChain
    inherited

    Binds observable properties to other objects implementing the Observable interface.

    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' );
    
    Copy code

    or even shorter:

    button.bind( 'isEnabled' ).to( command );
    
    Copy code

    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' );
    
    Copy code

    It is possible to bind more than one property at a time to shorten the code:

    button.bind( 'isEnabled', 'value' ).to( command );
    
    Copy code

    which corresponds to:

    button.bind( 'isEnabled' ).to( command );
    button.bind( 'value' ).to( command );
    
    Copy code

    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 );
    
    Copy code

    Using a custom callback allows processing the value before passing it to the target property:

    button.bind( 'isEnabled' ).to( command, 'value', value => value === 'heading1' );
    
    Copy code

    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 );
    
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    Parameters

    bindProperties : Array<'off' | 'set' | 'bind' | 'unbind' | 'decorate' | 'stopListening' | 'on' | 'once' | 'listenTo' | 'fire' | 'delegate' | 'stopDelegating' | 'destroy' | 'isEnabled' | 'editor' | 'forceDisabled' | 'clearForceDisabled' | '_registerMarkerToCopy' | '_copySelectedFragmentWithMarkers' | '_pasteMarkersIntoTransformedElement' | '_pasteFragmentWithMarkers' | '_forceMarkersCopy' | '_isMarkerCopyable' | '_hasMarkerConfiguration' | '_getMarkerClipboardConfig'>

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

    Returns

    ObservableMultiBindChain

    The bind chain with the to() and toMany() methods.

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    bind( bindProperty ) → ObservableSingleBindChain<K, ClipboardMarkersUtils[ K ]>
    inherited

    Binds observable properties to other objects implementing the Observable interface.

    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' );
    
    Copy code

    or even shorter:

    button.bind( 'isEnabled' ).to( command );
    
    Copy code

    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' );
    
    Copy code

    It is possible to bind more than one property at a time to shorten the code:

    button.bind( 'isEnabled', 'value' ).to( command );
    
    Copy code

    which corresponds to:

    button.bind( 'isEnabled' ).to( command );
    button.bind( 'value' ).to( command );
    
    Copy code

    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 );
    
    Copy code

    Using a custom callback allows processing the value before passing it to the target property:

    button.bind( 'isEnabled' ).to( command, 'value', value => value === 'heading1' );
    
    Copy code

    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 );
    
    Copy code

    Type parameters

    K

    Parameters

    bindProperty : K

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

    Returns

    ObservableSingleBindChain<K, ClipboardMarkersUtils[ K ]>

    The bind chain with the to() and toMany() methods.

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    clearForceDisabled( id ) → void
    inherited

    Clears forced disable previously set through forceDisabled. See forceDisabled.

    Parameters

    id : string

    Unique identifier, equal to the one passed in forceDisabled call.

    Returns

    void
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    decorate( methodName ) → void
    inherited

    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.

    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 extends ObservableMixin() {
    	constructor() {
    		super();
    		this.decorate( 'method' );
    	}
    
    	method() {
    		console.log( 'called!' );
    	}
    }
    
    const foo = new Foo();
    foo.on( 'method', ( evt ) => {
    	evt.stop();
    }, { priority: 'high' } );
    
    foo.method(); // Nothing is logged.
    
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    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'
    
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    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'
    
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    Parameters

    methodName : 'off' | 'set' | 'bind' | 'unbind' | 'decorate' | 'stopListening' | 'on' | 'once' | 'listenTo' | 'fire' | 'delegate' | 'stopDelegating' | 'destroy' | 'isEnabled' | 'editor' | 'forceDisabled' | 'clearForceDisabled' | '_registerMarkerToCopy' | '_copySelectedFragmentWithMarkers' | '_pasteMarkersIntoTransformedElement' | '_pasteFragmentWithMarkers' | '_forceMarkersCopy' | '_isMarkerCopyable' | '_hasMarkerConfiguration' | '_getMarkerClipboardConfig'

    Name of the method to decorate.

    Returns

    void
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    delegate( events ) → EmitterMixinDelegateChain
    inherited

    Delegates selected events to another Emitter. For instance:

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

    emitterA.fire( 'eventX', data );
    
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    and eventY is delegated (fired by) emitterC along with data:

    emitterA.fire( 'eventY', data );
    
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    Parameters

    events : Array<string>

    Event names that will be delegated to another emitter.

    Returns

    EmitterMixinDelegateChain
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    destroy() → void
    inherited

    Destroys the plugin.

    Note: This method is optional. A plugin instance does not need to have it defined.

    Returns

    void
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    fire( eventOrInfo, args ) → GetEventInfo<TEvent>[ 'return' ]
    inherited

    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).

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    forceDisabled( id ) → void
    inherited

    Disables the plugin.

    Plugin may be disabled by multiple features or algorithms (at once). When disabling a plugin, unique id should be passed (e.g. feature name). The same identifier should be used when enabling back the plugin. The plugin becomes enabled only after all features enabled it back.

    Disabling and enabling a plugin:

    plugin.isEnabled; // -> true
    plugin.forceDisabled( 'MyFeature' );
    plugin.isEnabled; // -> false
    plugin.clearForceDisabled( 'MyFeature' );
    plugin.isEnabled; // -> true
    
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    Plugin disabled by multiple features:

    plugin.forceDisabled( 'MyFeature' );
    plugin.forceDisabled( 'OtherFeature' );
    plugin.clearForceDisabled( 'MyFeature' );
    plugin.isEnabled; // -> false
    plugin.clearForceDisabled( 'OtherFeature' );
    plugin.isEnabled; // -> true
    
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    Multiple disabling with the same identifier is redundant:

    plugin.forceDisabled( 'MyFeature' );
    plugin.forceDisabled( 'MyFeature' );
    plugin.clearForceDisabled( 'MyFeature' );
    plugin.isEnabled; // -> true
    
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    Note: some plugins or algorithms may have more complex logic when it comes to enabling or disabling certain plugins, so the plugin might be still disabled after clearForceDisabled was used.

    Parameters

    id : string

    Unique identifier for disabling. Use the same id when enabling back the plugin.

    Returns

    void
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    listenTo( emitter, event, callback, [ options ] ) → void
    inherited

    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' );
    
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    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
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    off( event, callback ) → void
    inherited

    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
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    on( event, callback, [ options ] ) → void
    inherited

    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
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    once( event, callback, [ options ] ) → void
    inherited

    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
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    set( values ) → void
    inherited

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

    It accepts 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.

    In TypeScript, those properties should be declared in class using declare keyword. In example:

    public declare myProp1: number;
    public declare myProp2: string;
    
    constructor() {
    	this.set( {
    		'myProp1: 2,
    		'myProp2: 'foo'
    	} );
    }
    
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    Parameters

    values : object

    An object with name=>value pairs.

    Returns

    void
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    set( name, value ) → void
    inherited

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

    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.

    In TypeScript, those properties should be declared in class using declare keyword. In example:

    public declare myProp: number;
    
    constructor() {
    	this.set( 'myProp', 2 );
    }
    
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    Type parameters

    K

    Parameters

    name : K

    The property's name.

    value : ClipboardMarkersUtils[ K ]

    The property's value.

    Returns

    void
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    stopDelegating( [ event ], [ emitter ] ) → void
    inherited

    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
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    stopListening( [ emitter ], [ event ], [ callback ] ) → void
    inherited

    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
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    unbind( unbindProperties ) → void
    inherited

    Removes the binding created with bind.

    // Removes the binding for the 'a' property.
    A.unbind( 'a' );
    
    // Removes bindings for all properties.
    A.unbind();
    
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    Parameters

    unbindProperties : Array<'off' | 'set' | 'bind' | 'unbind' | 'decorate' | 'stopListening' | 'on' | 'once' | 'listenTo' | 'fire' | 'delegate' | 'stopDelegating' | 'destroy' | 'isEnabled' | 'editor' | 'forceDisabled' | 'clearForceDisabled' | '_registerMarkerToCopy' | '_copySelectedFragmentWithMarkers' | '_pasteMarkersIntoTransformedElement' | '_pasteFragmentWithMarkers' | '_forceMarkersCopy' | '_isMarkerCopyable' | '_hasMarkerConfiguration' | '_getMarkerClipboardConfig'>

    Observable properties to be unbound. All the bindings will be released if no properties are provided.

    Returns

    void
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    _copySelectedFragmentWithMarkers( action, selection, getCopiedFragment ) → ModelDocumentFragment
    internal

    Performs copy markers on provided selection and paste it to fragment returned from getCopiedFragment.

    1. Picks all markers in provided selection.
    2. Inserts fake markers to document.
    3. Gets copied selection fragment from document.
    4. Removes fake elements from fragment and document.
    5. Inserts markers in the place of removed fake markers.
    
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    Due to selection modification, when inserting items, getCopiedFragment must always operate on `writer.model.document.selection'. Do not use any other custom selection object within callback, as this will lead to out-of-bounds exceptions in rare scenarios.

    Parameters

    action : ClipboardMarkerRestrictedAction

    Type of clipboard action.

    selection : ModelSelection | ModelDocumentSelection

    Selection to be checked.

    getCopiedFragment : ( writer: ModelWriter ) => ModelDocumentFragment

    Callback that performs copy of selection and returns it as fragment.

    Defaults to ...

    Returns

    ModelDocumentFragment
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    _forceMarkersCopy( markerName, executor, config ) → void
    internal

    In some situations we have to perform copy on selected fragment with certain markers. This function allows to temporarily bypass restrictions on markers that we want to copy.

    This function executes executor() callback. For the duration of the callback, if the clipboard pipeline is used to copy content, markers with the specified name will be copied to the clipboard as well.

    Parameters

    markerName : string

    Which markers should be copied.

    executor : VoidFunction

    Callback executed.

    config : ClipboardMarkerConfiguration

    Optional configuration flags used to copy (such like partial copy flag).

    Defaults to ...

    Returns

    void
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    _getMarkerClipboardConfig( markerName ) → null | ClipboardMarkerConfiguration
    internal

    Returns marker's configuration flags passed during registration.

    Parameters

    markerName : string

    Name of marker that should be returned.

    Returns

    null | ClipboardMarkerConfiguration
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    _isMarkerCopyable( markerName, action ) → boolean
    internal

    Checks if marker can be copied.

    Parameters

    markerName : string

    Name of checked marker.

    action : null | ClipboardMarkerRestrictedAction

    Type of clipboard action. If null then checks only if marker is registered as copyable.

    Returns

    boolean
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    _pasteFragmentWithMarkers( fragment ) → ModelRange
    internal

    Pastes document fragment with markers to document. If duplicateOnPaste is true in marker config then associated markers IDs are regenerated before pasting to avoid markers duplications in content.

    Parameters

    fragment : ModelDocumentFragment

    Document fragment that should contain already processed by pipeline markers.

    Returns

    ModelRange
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    _pasteMarkersIntoTransformedElement( markers, getPastedDocumentElement ) → ModelElement
    internal

    Performs paste of markers on already pasted element.

    1. Inserts fake markers that are present in fragment element (such fragment will be processed in `getPastedDocumentElement`).
    2. Calls `getPastedDocumentElement` and gets element that is inserted into root model.
    3. Removes all fake markers present in transformed element.
    4. Inserts new markers with removed fake markers ranges into pasted fragment.
    
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    There are multiple edge cases that have to be considered before calling this function:

    * `markers` are inserted into the same element that must be later transformed inside `getPastedDocumentElement`.
    * Fake marker elements inside `getPastedDocumentElement` can be cloned, but their ranges cannot overlap.
    * If `duplicateOnPaste` is `true` in marker config then associated marker ID is regenerated before pasting.
    
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    Parameters

    markers : Map<string, ModelRange> | Record<string, ModelRange>

    Object that maps marker name to corresponding range.

    getPastedDocumentElement : ( writer: ModelWriter ) => ModelElement

    Getter used to get target markers element.

    Returns

    ModelElement
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    _registerMarkerToCopy( markerName, config ) → void
    internal

    Registers marker name as copyable in clipboard pipeline.

    Parameters

    markerName : string

    Name of marker that can be copied.

    config : ClipboardMarkerConfiguration

    Configuration that describes what can be performed on specified marker.

    Returns

    void
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    _getAllFakeMarkersFromElement( writer, rootElement ) → Array<FakeMarker>
    Lock icon private

    Returns array that contains list of fake markers with corresponding $marker elements.

    For each marker, there can be two $marker elements or only one (if the document fragment contained only the beginning or only the end of a marker).

    Parameters

    writer : ModelWriter

    An instance of the model writer.

    rootElement : ModelElement | ModelDocumentFragment

    The element to be checked.

    Returns

    Array<FakeMarker>
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    _getCopyableMarkersFromSelection( writer, selection, action ) → Array<CopyableMarker>
    Lock icon private

    Returns array of markers that can be copied in specified selection.

    If marker cannot be copied partially (according to copyPartiallySelected configuration flag) and is not present entirely in any selection range then it will be skipped.

    Parameters

    writer : ModelWriter

    An instance of the model writer.

    selection : ModelSelection | ModelDocumentSelection

    Selection which will be checked.

    action : null | ClipboardMarkerRestrictedAction

    Type of clipboard action. If null then checks only if marker is registered as copyable.

    Returns

    Array<CopyableMarker>
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    _getPasteMarkersFromRangeMap( markers, action ) → Array<CopyableMarker>
    Lock icon private

    Picks all markers from markers map that can be pasted. If duplicateOnPaste is true, it regenerates their IDs to ensure uniqueness. If marker is not registered, it will be kept in the array anyway.

    Parameters

    markers : Map<string, ModelRange> | Record<string, ModelRange>

    Object that maps marker name to corresponding range.

    action : null | ClipboardMarkerRestrictedAction

    Type of clipboard action. If null then checks only if marker is registered as copyable.

    Defaults to null

    Returns

    Array<CopyableMarker>
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    _getUniqueMarkerName( name ) → string
    Lock icon private

    When copy of markers occurs we have to make sure that pasted markers have different names than source markers. This functions helps with assigning unique part to marker name to prevent duplicated markers error.

    Parameters

    name : string

    Name of marker

    Returns

    string
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    _insertFakeMarkersElements( writer, markers ) → Record<string, Array<ModelElement>>
    Lock icon private

    Inserts specified array of fake markers elements to document and assigns them type and name attributes. Fake markers elements are used to calculate position of markers on pasted fragment that were transformed during steps between copy and paste.

    Parameters

    writer : ModelWriter

    An instance of the model writer.

    markers : Array<CopyableMarker>

    Array of markers that will be inserted.

    Returns

    Record<string, Array<ModelElement>>
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    _insertFakeMarkersIntoSelection( writer, selection, action ) → Record<string, Array<ModelElement>>
    Lock icon private

    First step of copying markers. It looks for markers intersecting with given selection and inserts $marker elements at positions where document markers start or end. This way $marker elements can be easily copied together with the rest of the content of the selection.

    Parameters

    writer : ModelWriter

    An instance of the model writer.

    selection : ModelSelection | ModelDocumentSelection

    Selection to be checked.

    action : ClipboardMarkerRestrictedAction

    Type of clipboard action.

    Returns

    Record<string, Array<ModelElement>>
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    _removeFakeMarkersInsideElement( writer, rootElement ) → Record<string, ModelRange>
    Lock icon private

    Removes all $marker elements from the given document fragment.

    Returns an object where keys are marker names, and values are ranges corresponding to positions where $marker elements were inserted.

    If the document fragment had only one $marker element for given marker (start or end) the other boundary is set automatically (to the end or start of the document fragment, respectively).

    Parameters

    writer : ModelWriter

    An instance of the model writer.

    rootElement : ModelElement | ModelDocumentFragment

    The element to be checked.

    Returns

    Record<string, ModelRange>

Events

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    change:isEnabled( eventInfo, name, value, oldValue )
    inherited

    Fired when the isEnabled property changed value.

    Parameters

    eventInfo : EventInfo

    An object containing information about the fired event.

    name : string

    Name of the changed property (isEnabled).

    value : boolean

    New value of the isEnabled property with given key or null, if operation should remove property.

    oldValue : boolean

    Old value of the isEnabled property with given key or null, if property was not set before.

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

    Fired when a property changed value.

    observable.set( 'prop', 1 );
    
    observable.on<ObservableChangeEvent<number>>( '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'
    
    Copy code

    Parameters

    eventInfo : EventInfo

    An object containing information about the fired event.

    name : string

    The property name.

    value : TValue

    The new property value.

    oldValue : TValue

    The previous property value.

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    set:isEnabled( eventInfo, name, value, oldValue )
    inherited

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

    Parameters

    eventInfo : EventInfo

    An object containing information about the fired event.

    name : string

    Name of the changed property (isEnabled).

    value : boolean

    New value of the isEnabled property with given key or null, if operation should remove property.

    oldValue : boolean

    Old value of the isEnabled property with given key or null, if property was not set before.

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

    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<ObservableSetEvent<number>>( '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<ObservableChangeEvent<number>>( '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'
    
    Copy code

    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 : TValue

    The new property value.

    oldValue : TValue

    The previous property value.