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Class

RootAttributeOperation (engine/model/operation)

@ckeditor/ckeditor5-engine/src/model/operation/rootattributeoperation

class

Operation to change root element's attribute. Using this class you can add, remove or change value of the attribute.

This operation is needed, because root elements can't be changed through

Filtering

Properties

Static properties

  • className : String

    inherited static

    Name of the operation class used for serialization.

Methods

  • constructor( root, key, oldValue, newValue, baseVersion )

    Creates an operation that changes, removes or adds attributes on root element.

    Parameters

    root : RootElement

    Root element to change.

    key : String

    Key of an attribute to change or remove.

    oldValue : *

    Old value of the attribute with given key or null if adding a new attribute.

    newValue : *

    New value to set for the attribute. If null, then the operation just removes the attribute.

    baseVersion : Number | null

    Document version on which operation can be applied or null if the operation operates on detached (non-document) tree.

  • Creates and returns an operation that has the same parameters as this operation.

    Returns

    RootAttributeOperation

    Clone of this operation.

    Overrides: Operation#clone
  • toJSON() → Object

    inherited

    Custom toJSON method to solve child-parent circular dependencies.

    Returns

    Object

    Clone of this object with the delta property replaced with string.

  • _execute()

    protected inherited

    Executes the operation - modifications described by the operation properties will be applied to the model tree.

    Overrides: Operation#_execute
  • _validate()

    protected inherited

    Checks whether the operation's parameters are correct and the operation can be correctly executed. Throws an error if operation is not valid.

    Overrides: Operation#_validate

Static methods

  • fromJSON( json, document ) → RootAttributeOperation

    static

    Creates RootAttributeOperation object from deserilized object, i.e. from parsed JSON string.

    Parameters

    json : Object

    Deserialized JSON object.

    document : Document

    Document on which this operation will be applied.

    Returns

    RootAttributeOperation