ReadonlydocumentA reference to the module:engine/view/document~ViewDocument object.
ReadonlydomReference to the module:engine/view/view~EditingView#domConverter.
ReadonlyfocusInstance of the focus observer. Focus observer calls module:engine/view/observer/focusobserver~FocusObserver#flush to mark the latest focus change as complete.
ReadonlymutationInstance of the mutation observer. Selection observer calls module:engine/view/observer/mutationobserver~MutationObserver#flush to ensure that the mutations will be handled before the module:engine/view/document~ViewDocument#event:selectionChange event is fired.
ReadonlyselectionReference to the view module:engine/view/documentselection~ViewDocumentSelection object used to compare new selection with it.
ReadonlyviewAn instance of the view controller.
The state of the observer. If it is disabled, no events will be fired.
Checks whether a given DOM event should be ignored (should not be turned into a synthetic view document event).
Currently, an event will be ignored only if its target or any of its ancestors has the data-cke-ignore-events attribute.
This attribute can be used inside the structures generated by
module:engine/view/downcastwriter~ViewDowncastWriter#createUIElement ViewDowncastWriter#createUIElement() to ignore events
fired within a UI that should be excluded from CKEditor 5's realms.
The DOM event target to check (usually an element, sometimes a text node and potentially sometimes a document, too).
Whether this event should be ignored by the observer.
Disables and destroys the observer, among others removes event listeners created by the observer.
Enables the observer. This method is called when the observer is registered to the module:engine/view/view~EditingView and after module:engine/view/view~EditingView#forceRender rendering (all observers are #disable disabled before rendering).
A typical use case for disabling observers is that mutation observers need to be disabled for the rendering. However, a child class may not need to be disabled, so it can implement an empty method.
Starts observing given DOM element.
DOM element to observe.
Selection observer class observes selection changes in the document. If a selection changes on the document this observer checks if the DOM selection is different from the module:engine/view/document~ViewDocument#selection view selection. The selection observer fires module:engine/view/document~ViewDocument#event:selectionChange event only if a selection change was the only change in the document and the DOM selection is different from the view selection.
This observer also manages the module:engine/view/document~ViewDocument#isSelecting property of the view document.
Note that this observer is attached by the module:engine/view/view~EditingView and is available by default.