/**
* @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
*/
/**
* @module engine/view/downcastwriter
*/
import { ViewPosition, type ViewPositionOffset } from "./position.js";
import { ViewRange } from "./range.js";
import { ViewSelection, type ViewPlaceOrOffset, type ViewSelectable, type ViewSelectionOptions } from "./selection.js";
import { ViewContainerElement } from "./containerelement.js";
import { ViewAttributeElement } from "./attributeelement.js";
import { ViewEmptyElement } from "./emptyelement.js";
import { ViewUIElement } from "./uielement.js";
import { ViewRawElement } from "./rawelement.js";
import { type ArrayOrItem } from "@ckeditor/ckeditor5-utils";
import { ViewDocumentFragment } from "./documentfragment.js";
import { ViewText } from "./text.js";
import { ViewEditableElement } from "./editableelement.js";
import { type ViewDocument } from "./document.js";
import { type ViewNode } from "./node.js";
import type { ViewElement, ViewElementAttributes } from "./element.js";
import { type ViewDomConverter } from "./domconverter.js";
import { type ViewItem } from "./item.js";
import type { DowncastSlotFilter } from "../conversion/downcasthelpers.js";
import type { StyleValue } from "./stylesmap.js";
type DomDocument = globalThis.Document;
type DomElement = globalThis.HTMLElement;
/**
* View downcast writer.
*
* It provides a set of methods used to manipulate view nodes.
*
* Do not create an instance of this writer manually. To modify a view structure, use
* the {@link module:engine/view/view~EditingView#change `View#change()`} block.
*
* The `ViewDowncastWriter` is designed to work with semantic views which are the views that were/are being downcasted from the model.
* To work with ordinary views (e.g. parsed from a pasted content) use the
* {@link module:engine/view/upcastwriter~ViewUpcastWriter upcast writer}.
*
* Read more about changing the view in the {@glink framework/architecture/editing-engine#changing-the-view Changing the view}
* section of the {@glink framework/architecture/editing-engine Editing engine architecture} guide.
*/
export declare class ViewDowncastWriter {
	/**
	* The view document instance in which this writer operates.
	*/
	readonly document: ViewDocument;
	/**
	* Holds references to the attribute groups that share the same {@link module:engine/view/attributeelement~ViewAttributeElement#id id}.
	* The keys are `id`s, the values are `Set`s holding {@link module:engine/view/attributeelement~ViewAttributeElement}s.
	*/
	private readonly _cloneGroups;
	/**
	* The slot factory used by the `elementToStructure` downcast helper.
	*/
	private _slotFactory;
	/**
	* @param document The view document instance.
	*/
	constructor(document: ViewDocument);
	/**
	* Sets {@link module:engine/view/documentselection~ViewDocumentSelection selection's} ranges and direction to the
	* specified location based on the given {@link module:engine/view/selection~ViewSelectable selectable}.
	*
	* Usage:
	*
	* ```ts
	* // Sets collapsed selection at the position of given item and offset.
	* const paragraph = writer.createContainerElement( 'p' );
	* writer.setSelection( paragraph, offset );
	* ```
	*
	* Creates a range inside an {@link module:engine/view/element~ViewElement element} which starts before the first child of
	* that element and ends after the last child of that element.
	*
	* ```ts
	* writer.setSelection( paragraph, 'in' );
	* ```
	*
	* Creates a range on the {@link module:engine/view/item~ViewItem item} which starts before the item and ends just after the item.
	*
	* ```ts
	* writer.setSelection( paragraph, 'on' );
	* ```
	*
	* `ViewDowncastWriter#setSelection()` allow passing additional options (`backward`, `fake` and `label`) as the last argument.
	*
	* ```ts
	* // Sets selection as backward.
	* writer.setSelection( element, 'in', { backward: true } );
	*
	* // Sets selection as fake.
	* // Fake selection does not render as browser native selection over selected elements and is hidden to the user.
	* // This way, no native selection UI artifacts are displayed to the user and selection over elements can be
	* // represented in other way, for example by applying proper CSS class.
	* writer.setSelection( element, 'in', { fake: true } );
	*
	* // Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM
	* // (and be  properly handled by screen readers).
	* writer.setSelection( element, 'in', { fake: true, label: 'foo' } );
	* ```
	*
	* See also: {@link #setSelection:SELECTABLE `setSelection( selectable, options )`}.
	*
	* @label NODE_OFFSET
	*/
	setSelection(selectable: ViewNode, placeOrOffset: ViewPlaceOrOffset, options?: ViewSelectionOptions): void;
	/**
	* Sets {@link module:engine/view/documentselection~ViewDocumentSelection selection's} ranges and direction to the
	* specified location based on the given {@link module:engine/view/selection~ViewSelectable selectable}.
	*
	* Usage:
	*
	* ```ts
	* // Sets selection to the given range.
	* const range = writer.createRange( start, end );
	* writer.setSelection( range );
	*
	* // Sets backward selection to the given range.
	* const range = writer.createRange( start, end );
	* writer.setSelection( range );
	*
	* // Sets selection to given ranges.
	* const ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];
	* writer.setSelection( range );
	*
	* // Sets selection to the other selection.
	* const otherSelection = writer.createSelection();
	* writer.setSelection( otherSelection );
	*
	* // Sets collapsed selection at the given position.
	* const position = writer.createPositionFromPath( root, path );
	* writer.setSelection( position );
	*
	* // Removes all ranges.
	* writer.setSelection( null );
	* ```
	*
	* `ViewDowncastWriter#setSelection()` allow passing additional options (`backward`, `fake` and `label`) as the last argument.
	*
	* ```ts
	* // Sets selection as backward.
	* writer.setSelection( range, { backward: true } );
	*
	* // Sets selection as fake.
	* // Fake selection does not render as browser native selection over selected elements and is hidden to the user.
	* // This way, no native selection UI artifacts are displayed to the user and selection over elements can be
	* // represented in other way, for example by applying proper CSS class.
	* writer.setSelection( range, { fake: true } );
	*
	* // Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM
	* // (and be  properly handled by screen readers).
	* writer.setSelection( range, { fake: true, label: 'foo' } );
	* ```
	*
	* See also: {@link #setSelection:NODE_OFFSET `setSelection( node, placeOrOffset, options )`}.
	*
	* @label SELECTABLE
	*/
	setSelection(selectable: Exclude<ViewSelectable, ViewNode>, options?: ViewSelectionOptions): void;
	/**
	* Moves {@link module:engine/view/documentselection~ViewDocumentSelection#focus selection's focus} to the specified location.
	*
	* The location can be specified in the same form as
	* {@link module:engine/view/view~EditingView#createPositionAt view.createPositionAt()}
	* parameters.
	*
	* @param itemOrPosition
	* @param offset Offset or one of the flags. Used only when the first parameter is a {@link module:engine/view/item~ViewItem view item}.
	*/
	setSelectionFocus(itemOrPosition: ViewItem | ViewPosition, offset?: ViewPositionOffset): void;
	/**
	* Creates a new {@link module:engine/view/documentfragment~ViewDocumentFragment} instance.
	*
	* @param children A list of nodes to be inserted into the created document fragment.
	* @returns The created document fragment.
	*/
	createDocumentFragment(children?: ViewNode | Iterable<ViewNode>): ViewDocumentFragment;
	/**
	* Creates a new {@link module:engine/view/text~ViewText text node}.
	*
	* ```ts
	* writer.createText( 'foo' );
	* ```
	*
	* @param data The text's data.
	* @returns The created text node.
	*/
	createText(data: string): ViewText;
	/**
	* Creates a new {@link module:engine/view/attributeelement~ViewAttributeElement}.
	*
	* ```ts
	* writer.createAttributeElement( 'strong' );
	* writer.createAttributeElement( 'a', { href: 'foo.bar' } );
	*
	* // Make `<a>` element contain other attributes element so the `<a>` element is not broken.
	* writer.createAttributeElement( 'a', { href: 'foo.bar' }, { priority: 5 } );
	*
	* // Set `id` of a marker element so it is not joined or merged with "normal" elements.
	* writer.createAttributeElement( 'span', { class: 'my-marker' }, { id: 'marker:my' } );
	* ```
	*
	* @param name Name of the element.
	* @param attributes Element's attributes.
	* @param options Element's options.
	* @param options.priority Element's {@link module:engine/view/attributeelement~ViewAttributeElement#priority priority}.
	* @param options.id Element's {@link module:engine/view/attributeelement~ViewAttributeElement#id id}.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns Created element.
	*/
	createAttributeElement(name: string, attributes?: ViewElementAttributes, options?: {
		priority?: number;
		id?: number | string;
		renderUnsafeAttributes?: Array<string>;
	}): ViewAttributeElement;
	/**
	* Creates a new {@link module:engine/view/containerelement~ViewContainerElement}.
	*
	* ```ts
	* writer.createContainerElement( 'p' );
	*
	* // Create element with custom attributes.
	* writer.createContainerElement( 'div', { id: 'foo-bar', 'data-baz': '123' } );
	*
	* // Create element with custom styles.
	* writer.createContainerElement( 'p', { style: 'font-weight: bold; padding-bottom: 10px' } );
	*
	* // Create element with custom classes.
	* writer.createContainerElement( 'p', { class: 'foo bar baz' } );
	*
	* // Create element with specific options.
	* writer.createContainerElement( 'span', { class: 'placeholder' }, { renderUnsafeAttributes: [ 'foo' ] } );
	* ```
	*
	* @label WITHOUT_CHILDREN
	* @param name Name of the element.
	* @param attributes Elements attributes.
	* @param options Element's options.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns Created element.
	*/
	createContainerElement(name: string, attributes?: ViewElementAttributes, options?: {
		renderUnsafeAttributes?: Array<string>;
	}): ViewContainerElement;
	/**
	* Creates a new {@link module:engine/view/containerelement~ViewContainerElement} with children.
	*
	* ```ts
	* // Create element with children.
	* writer.createContainerElement( 'figure', { class: 'image' }, [
	* 	writer.createEmptyElement( 'img' ),
	* 	writer.createContainerElement( 'figcaption' )
	* ] );
	*
	* // Create element with specific options.
	* writer.createContainerElement( 'figure', { class: 'image' }, [
	* 	writer.createEmptyElement( 'img' ),
	* 	writer.createContainerElement( 'figcaption' )
	* ], { renderUnsafeAttributes: [ 'foo' ] } );
	* ```
	*
	* @label WITH_CHILDREN
	* @param name Name of the element.
	* @param attributes Elements attributes.
	* @param children A node or a list of nodes to be inserted into the created element.
	* If no children were specified, element's `options` can be passed in this argument.
	* @param options Element's options.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns Created element.
	*/
	createContainerElement(name: string, attributes: ViewElementAttributes, children: ViewNode | Iterable<ViewNode>, options?: {
		renderUnsafeAttributes?: Array<string>;
	}): ViewContainerElement;
	/**
	* Creates a new {@link module:engine/view/editableelement~ViewEditableElement}.
	*
	* ```ts
	* writer.createEditableElement( 'div' );
	* writer.createEditableElement( 'div', { id: 'foo-1234' } );
	* ```
	*
	* Note: The editable element is to be used in the editing pipeline. Usually, together with
	* {@link module:widget/utils~toWidgetEditable `toWidgetEditable()`}.
	*
	* @param name Name of the element.
	* @param attributes Elements attributes.
	* @param options Element's options.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns Created element.
	*/
	createEditableElement(name: string, attributes?: ViewElementAttributes, options?: {
		renderUnsafeAttributes?: Array<string>;
	}): ViewEditableElement;
	/**
	* Creates a new {@link module:engine/view/emptyelement~ViewEmptyElement}.
	*
	* ```ts
	* writer.createEmptyElement( 'img' );
	* writer.createEmptyElement( 'img', { id: 'foo-1234' } );
	* ```
	*
	* @param name Name of the element.
	* @param attributes Elements attributes.
	* @param options Element's options.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns Created element.
	*/
	createEmptyElement(name: string, attributes?: ViewElementAttributes, options?: {
		renderUnsafeAttributes?: Array<string>;
	}): ViewEmptyElement;
	/**
	* Creates a new {@link module:engine/view/uielement~ViewUIElement}.
	*
	* ```ts
	* writer.createUIElement( 'span' );
	* writer.createUIElement( 'span', { id: 'foo-1234' } );
	* ```
	*
	* A custom render function can be provided as the third parameter:
	*
	* ```ts
	* writer.createUIElement( 'span', null, function( domDocument ) {
	* 	const domElement = this.toDomElement( domDocument );
	* 	domElement.innerHTML = '<b>this is ui element</b>';
	*
	* 	return domElement;
	* } );
	* ```
	*
	* Unlike {@link #createRawElement raw elements}, UI elements are by no means editor content, for instance,
	* they are ignored by the editor selection system.
	*
	* You should not use UI elements as data containers. Check out {@link #createRawElement} instead.
	*
	* @param name The name of the element.
	* @param attributes Element attributes.
	* @param renderFunction A custom render function.
	* @returns The created element.
	*/
	createUIElement(name: string, attributes?: ViewElementAttributes, renderFunction?: (this: ViewUIElement, domDocument: DomDocument, domConverter: ViewDomConverter) => DomElement): ViewUIElement;
	/**
	* Creates a new {@link module:engine/view/rawelement~ViewRawElement}.
	*
	* ```ts
	* writer.createRawElement( 'span', { id: 'foo-1234' }, function( domElement ) {
	* 	domElement.innerHTML = '<b>This is the raw content of the raw element.</b>';
	* } );
	* ```
	*
	* Raw elements work as data containers ("wrappers", "sandboxes") but their children are not managed or
	* even recognized by the editor. This encapsulation allows integrations to maintain custom DOM structures
	* in the editor content without, for instance, worrying about compatibility with other editor features.
	* Raw elements are a perfect tool for integration with external frameworks and data sources.
	*
	* Unlike {@link #createUIElement UI elements}, raw elements act like "real" editor content (similar to
	* {@link module:engine/view/containerelement~ViewContainerElement} or {@link module:engine/view/emptyelement~ViewEmptyElement}),
	* and they are considered by the editor selection.
	*
	* You should not use raw elements to render the UI in the editor content. Check out {@link #createUIElement `#createUIElement()`}
	* instead.
	*
	* @param name The name of the element.
	* @param attributes Element attributes.
	* @param renderFunction A custom render function.
	* @param options Element's options.
	* @param options.renderUnsafeAttributes A list of attribute names that should be rendered in the editing
	* pipeline even though they would normally be filtered out by unsafe attribute detection mechanisms.
	* @returns The created element.
	*/
	createRawElement(name: string, attributes?: ViewElementAttributes, renderFunction?: (domElement: DomElement, domConverter: ViewDomConverter) => void, options?: {
		renderUnsafeAttributes?: Array<string>;
	}): ViewRawElement;
	/**
	* Adds or overwrites the element's attribute with a specified key and value.
	*
	* ```ts
	* writer.setAttribute( 'href', 'http://ckeditor.com', linkElement );
	* ```
	*
	* @param key The attribute key.
	* @param value The attribute value.
	* @param element The element to set an attribute on.
	*/
	setAttribute(key: string, value: unknown, element: ViewElement): void;
	/**
	* Adds or overwrites the element's attribute with a specified key and value.
	* Note that for tokenized attributes it allows the `reset` parameter to specify if the previous
	* attribute value should be overwritten or a new token (class name, style property) should be added.
	*
	* ```ts
	* writer.setAttribute( 'href', 'http://ckeditor.com', linkElement );
	* writer.setAttribute( 'class', 'foo', false, element );
	* ```
	*
	* @param key The attribute key.
	* @param value The attribute value.
	* @param overwrite Whether tokenized attribute should overwrite the attribute value or just add a token.
	* @param element The element to set an attribute on.
	*/
	setAttribute(key: string, value: unknown, overwrite: boolean, element: ViewElement): void;
	/**
	* Removes attribute from the element.
	*
	* ```ts
	* writer.removeAttribute( 'href', linkElement );
	* ```
	*
	* @param key Attribute key.
	* @param element The element to remove an attribute of.
	*/
	removeAttribute(key: string, element: ViewElement): void;
	/**
	* Removes specified tokens from an attribute value (for example class names, style properties).
	* If resulting attribute become empty, the whole attribute is removed.
	*
	* ```ts
	* writer.removeAttribute( 'class', 'foo', linkElement );
	* ```
	*
	* @param key Attribute key.
	* @param tokens Tokens to partly remove from attribute value. For example class names or style property names.
	* @param element The element to remove an attribute of.
	*/
	removeAttribute(key: string, tokens: ArrayOrItem<string>, element: ViewElement): void;
	/**
	* Adds specified class to the element.
	*
	* ```ts
	* writer.addClass( 'foo', linkElement );
	* writer.addClass( [ 'foo', 'bar' ], linkElement );
	* ```
	*/
	addClass(className: string | Array<string>, element: ViewElement): void;
	/**
	* Removes specified class from the element.
	*
	* ```ts
	* writer.removeClass( 'foo', linkElement );
	* writer.removeClass( [ 'foo', 'bar' ], linkElement );
	* ```
	*/
	removeClass(className: string | Array<string>, element: ViewElement): void;
	/**
	* Adds style to the element.
	*
	* ```ts
	* writer.setStyle( 'color', 'red', element );
	* ```
	*
	* **Note**: The passed style can be normalized if
	* {@link module:engine/controller/datacontroller~DataController#addStyleProcessorRules a particular style processor rule is enabled}.
	* See {@link module:engine/view/stylesmap~StylesMap#set `StylesMap#set()`} for details.
	*
	* @label KEY_VALUE
	* @param property Property name.
	* @param value Value to set.
	* @param element Element to set styles on.
	*/
	setStyle(property: string, value: StyleValue, element: ViewElement): void;
	/**
	* Adds many styles to the element.
	*
	* ```ts
	* writer.setStyle( {
	* 	color: 'red',
	* 	position: 'fixed'
	* }, element );
	* ```
	*
	* **Note**: The passed style can be normalized if
	* {@link module:engine/controller/datacontroller~DataController#addStyleProcessorRules a particular style processor rule is enabled}.
	* See {@link module:engine/view/stylesmap~StylesMap#set `StylesMap#set()`} for details.
	*
	* @label OBJECT
	* @param property Object with key - value pairs.
	* @param element Element to set styles on.
	*/
	setStyle(property: Record<string, StyleValue>, element: ViewElement): void;
	/**
	* Removes specified style from the element.
	*
	* ```ts
	* writer.removeStyle( 'color', element ); // Removes 'color' style.
	* writer.removeStyle( [ 'color', 'border-top' ], element ); // Removes both 'color' and 'border-top' styles.
	* ```
	*
	* **Note**: This method can work with normalized style names if
	* {@link module:engine/controller/datacontroller~DataController#addStyleProcessorRules a particular style processor rule is enabled}.
	* See {@link module:engine/view/stylesmap~StylesMap#remove `StylesMap#remove()`} for details.
	*/
	removeStyle(property: string | Array<string>, element: ViewElement): void;
	/**
	* Sets a custom property on element. Unlike attributes, custom properties are not rendered to the DOM,
	* so they can be used to add special data to elements.
	*/
	setCustomProperty(key: string | symbol, value: unknown, element: ViewElement | ViewDocumentFragment): void;
	/**
	* Removes a custom property stored under the given key.
	*
	* @returns Returns true if property was removed.
	*/
	removeCustomProperty(key: string | symbol, element: ViewElement | ViewDocumentFragment): boolean;
	/**
	* Breaks attribute elements at the provided position or at the boundaries of a provided range. It breaks attribute elements
	* up to their first ancestor that is a container element.
	*
	* In following examples `<p>` is a container, `<b>` and `<u>` are attribute elements:
	*
	* ```html
	* <p>foo<b><u>bar{}</u></b></p> -> <p>foo<b><u>bar</u></b>[]</p>
	* <p>foo<b><u>{}bar</u></b></p> -> <p>foo{}<b><u>bar</u></b></p>
	* <p>foo<b><u>b{}ar</u></b></p> -> <p>foo<b><u>b</u></b>[]<b><u>ar</u></b></p>
	* <p><b>fo{o</b><u>ba}r</u></p> -> <p><b>fo</b><b>o</b><u>ba</u><u>r</u></b></p>
	* ```
	*
	* **Note:** {@link module:engine/view/documentfragment~ViewDocumentFragment DocumentFragment} is treated like a container.
	*
	* **Note:** The difference between {@link module:engine/view/downcastwriter~ViewDowncastWriter#breakAttributes breakAttributes()} and
	* {@link module:engine/view/downcastwriter~ViewDowncastWriter#breakContainer breakContainer()} is that `breakAttributes()` breaks all
	* {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements} that are ancestors of a given `position`,
	* up to the first encountered {@link module:engine/view/containerelement~ViewContainerElement container element}.
	* `breakContainer()` assumes that a given `position` is directly in the container element and breaks that container element.
	*
	* Throws the `view-writer-invalid-range-container` {@link module:utils/ckeditorerror~CKEditorError CKEditorError}
	* when the {@link module:engine/view/range~ViewRange#start start}
	* and {@link module:engine/view/range~ViewRange#end end} positions of a passed range are not placed inside same parent container.
	*
	* Throws the `view-writer-cannot-break-empty-element` {@link module:utils/ckeditorerror~CKEditorError CKEditorError}
	* when trying to break attributes inside an {@link module:engine/view/emptyelement~ViewEmptyElement ViewEmptyElement}.
	*
	* Throws the `view-writer-cannot-break-ui-element` {@link module:utils/ckeditorerror~CKEditorError CKEditorError}
	* when trying to break attributes inside a {@link module:engine/view/uielement~ViewUIElement UIElement}.
	*
	* @see module:engine/view/attributeelement~ViewAttributeElement
	* @see module:engine/view/containerelement~ViewContainerElement
	* @see module:engine/view/downcastwriter~ViewDowncastWriter#breakContainer
	* @param positionOrRange The position where to break attribute elements.
	* @returns The new position or range, after breaking the attribute elements.
	*/
	breakAttributes(positionOrRange: ViewPosition | ViewRange): ViewPosition | ViewRange;
	/**
	* Breaks a {@link module:engine/view/containerelement~ViewContainerElement container view element} into two, at the given position.
	* The position has to be directly inside the container element and cannot be in the root. It does not break the conrainer view element
	* if the position is at the beginning or at the end of its parent element.
	*
	* ```html
	* <p>foo^bar</p> -> <p>foo</p><p>bar</p>
	* <div><p>foo</p>^<p>bar</p></div> -> <div><p>foo</p></div><div><p>bar</p></div>
	* <p>^foobar</p> -> ^<p>foobar</p>
	* <p>foobar^</p> -> <p>foobar</p>^
	* ```
	*
	* **Note:** The difference between {@link module:engine/view/downcastwriter~ViewDowncastWriter#breakAttributes breakAttributes()} and
	* {@link module:engine/view/downcastwriter~ViewDowncastWriter#breakContainer breakContainer()} is that `breakAttributes()` breaks all
	* {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements} that are ancestors of a given `position`,
	* up to the first encountered {@link module:engine/view/containerelement~ViewContainerElement container element}.
	* `breakContainer()` assumes that the given `position` is directly in the container element and breaks that container element.
	*
	* @see module:engine/view/attributeelement~ViewAttributeElement
	* @see module:engine/view/containerelement~ViewContainerElement
	* @see module:engine/view/downcastwriter~ViewDowncastWriter#breakAttributes
	* @param position The position where to break the element.
	* @returns The position between broken elements. If an element has not been broken,
	* the returned position is placed either before or after it.
	*/
	breakContainer(position: ViewPosition): ViewPosition;
	/**
	* Merges {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements}. It also merges text nodes if needed.
	* Only {@link module:engine/view/attributeelement~ViewAttributeElement#isSimilar similar} attribute elements can be merged.
	*
	* In following examples `<p>` is a container and `<b>` is an attribute element:
	*
	* ```html
	* <p>foo[]bar</p> -> <p>foo{}bar</p>
	* <p><b>foo</b>[]<b>bar</b></p> -> <p><b>foo{}bar</b></p>
	* <p><b foo="bar">a</b>[]<b foo="baz">b</b></p> -> <p><b foo="bar">a</b>[]<b foo="baz">b</b></p>
	* ```
	*
	* It will also take care about empty attributes when merging:
	*
	* ```html
	* <p><b>[]</b></p> -> <p>[]</p>
	* <p><b>foo</b><i>[]</i><b>bar</b></p> -> <p><b>foo{}bar</b></p>
	* ```
	*
	* **Note:** Difference between {@link module:engine/view/downcastwriter~ViewDowncastWriter#mergeAttributes mergeAttributes} and
	* {@link module:engine/view/downcastwriter~ViewDowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two
	* {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements} or
	* {@link module:engine/view/text~ViewText text nodes} while `mergeContainer` merges two
	* {@link module:engine/view/containerelement~ViewContainerElement container elements}.
	*
	* @see module:engine/view/attributeelement~ViewAttributeElement
	* @see module:engine/view/containerelement~ViewContainerElement
	* @see module:engine/view/downcastwriter~ViewDowncastWriter#mergeContainers
	* @param position Merge position.
	* @returns Position after merge.
	*/
	mergeAttributes(position: ViewPosition): ViewPosition;
	/**
	* Merges two {@link module:engine/view/containerelement~ViewContainerElement container elements} that are
	* before and after given position. Precisely, the element after the position is removed and it's contents are
	* moved to element before the position.
	*
	* ```html
	* <p>foo</p>^<p>bar</p> -> <p>foo^bar</p>
	* <div>foo</div>^<p>bar</p> -> <div>foo^bar</div>
	* ```
	*
	* **Note:** Difference between {@link module:engine/view/downcastwriter~ViewDowncastWriter#mergeAttributes mergeAttributes} and
	* {@link module:engine/view/downcastwriter~ViewDowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two
	* {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements} or
	* {@link module:engine/view/text~ViewText text nodes} while `mergeContainer` merges two
	* {@link module:engine/view/containerelement~ViewContainerElement container elements}.
	*
	* @see module:engine/view/attributeelement~ViewAttributeElement
	* @see module:engine/view/containerelement~ViewContainerElement
	* @see module:engine/view/downcastwriter~ViewDowncastWriter#mergeAttributes
	* @param position Merge position.
	* @returns Position after merge.
	*/
	mergeContainers(position: ViewPosition): ViewPosition;
	/**
	* Inserts a node or nodes at specified position. Takes care about breaking attributes before insertion
	* and merging them afterwards.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert
	* contains instances that are not {@link module:engine/view/text~ViewText Texts},
	* {@link module:engine/view/attributeelement~ViewAttributeElement ViewAttributeElements},
	* {@link module:engine/view/containerelement~ViewContainerElement ViewContainerElements},
	* {@link module:engine/view/emptyelement~ViewEmptyElement ViewEmptyElements},
	* {@link module:engine/view/rawelement~ViewRawElement RawElements} or
	* {@link module:engine/view/uielement~ViewUIElement UIElements}.
	*
	* @param position Insertion position.
	* @param nodes Node or nodes to insert.
	* @returns Range around inserted nodes.
	*/
	insert(position: ViewPosition, nodes: ViewNode | Iterable<ViewNode>): ViewRange;
	/**
	* Removes provided range from the container.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when
	* {@link module:engine/view/range~ViewRange#start start} and {@link module:engine/view/range~ViewRange#end end}
	* positions are not placed inside same parent container.
	*
	* @param rangeOrItem Range to remove from container
	* or an {@link module:engine/view/item~ViewItem item} to remove. If range is provided, after removing, it will be updated
	* to a collapsed range showing the new position.
	* @returns Document fragment containing removed nodes.
	*/
	remove(rangeOrItem: ViewRange | ViewItem): ViewDocumentFragment;
	/**
	* Removes matching elements from given range.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when
	* {@link module:engine/view/range~ViewRange#start start} and {@link module:engine/view/range~ViewRange#end end}
	* positions are not placed inside same parent container.
	*
	* @param range Range to clear.
	* @param element Element to remove.
	*/
	clear(range: ViewRange, element: ViewElement): void;
	/**
	* Moves nodes from provided range to target position.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when
	* {@link module:engine/view/range~ViewRange#start start} and {@link module:engine/view/range~ViewRange#end end}
	* positions are not placed inside same parent container.
	*
	* @param sourceRange Range containing nodes to move.
	* @param targetPosition Position to insert.
	* @returns Range in target container. Inserted nodes are placed between
	* {@link module:engine/view/range~ViewRange#start start} and {@link module:engine/view/range~ViewRange#end end} positions.
	*/
	move(sourceRange: ViewRange, targetPosition: ViewPosition): ViewRange;
	/**
	* Wraps elements within range with provided {@link module:engine/view/attributeelement~ViewAttributeElement ViewAttributeElement}.
	* If a collapsed range is provided, it will be wrapped only if it is equal to view selection.
	*
	* If a collapsed range was passed and is same as selection, the selection
	* will be moved to the inside of the wrapped attribute element.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-invalid-range-container`
	* when {@link module:engine/view/range~ViewRange#start}
	* and {@link module:engine/view/range~ViewRange#end} positions are not placed inside same parent container.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not
	* an instance of {@link module:engine/view/attributeelement~ViewAttributeElement ViewAttributeElement}.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-nonselection-collapsed-range` when passed range
	* is collapsed and different than view selection.
	*
	* @param range Range to wrap.
	* @param attribute Attribute element to use as wrapper.
	* @returns range Range after wrapping, spanning over wrapping attribute element.
	*/
	wrap(range: ViewRange, attribute: ViewAttributeElement): ViewRange;
	/**
	* Unwraps nodes within provided range from attribute element.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when
	* {@link module:engine/view/range~ViewRange#start start} and {@link module:engine/view/range~ViewRange#end end}
	* positions are not placed inside same parent container.
	*/
	unwrap(range: ViewRange, attribute: ViewAttributeElement): ViewRange;
	/**
	* Renames element by creating a copy of renamed element but with changed name and then moving contents of the
	* old element to the new one. Keep in mind that this will invalidate all {@link module:engine/view/position~ViewPosition positions}
	* which has renamed element as {@link module:engine/view/position~ViewPosition#parent a parent}.
	*
	* New element has to be created because `Element#tagName` property in DOM is readonly.
	*
	* Since this function creates a new element and removes the given one, the new element is returned to keep reference.
	*
	* @param newName New name for element.
	* @param viewElement Element to be renamed.
	* @returns Element created due to rename.
	*/
	rename(newName: string, viewElement: ViewContainerElement): ViewContainerElement;
	/**
	* Cleans up memory by removing obsolete cloned elements group from the writer.
	*
	* Should be used whenever all {@link module:engine/view/attributeelement~ViewAttributeElement attribute elements}
	* with the same {@link module:engine/view/attributeelement~ViewAttributeElement#id id} are going to be removed from the view and
	* the group will no longer be needed.
	*
	* Cloned elements group are not removed automatically in case if the group is still needed after all its elements
	* were removed from the view.
	*
	* Keep in mind that group names are equal to the `id` property of the attribute element.
	*
	* @param groupName Name of the group to clear.
	*/
	clearClonedElementsGroup(groupName: string): void;
	/**
	* Creates position at the given location. The location can be specified as:
	*
	* * a {@link module:engine/view/position~ViewPosition position},
	* * parent element and offset (offset defaults to `0`),
	* * parent element and `'end'` (sets position at the end of that element),
	* * {@link module:engine/view/item~ViewItem view item} and `'before'` or `'after'` (sets position before or after given view item).
	*
	* This method is a shortcut to other constructors such as:
	*
	* * {@link #createPositionBefore},
	* * {@link #createPositionAfter},
	*
	* @param offset Offset or one of the flags. Used only when the first parameter is a {@link module:engine/view/item~ViewItem view item}.
	*/
	createPositionAt(itemOrPosition: ViewItem | ViewPosition, offset?: ViewPositionOffset): ViewPosition;
	/**
	* Creates a new position after given view item.
	*
	* @param item View item after which the position should be located.
	*/
	createPositionAfter(item: ViewItem): ViewPosition;
	/**
	* Creates a new position before given view item.
	*
	* @param item View item before which the position should be located.
	*/
	createPositionBefore(item: ViewItem): ViewPosition;
	/**
	* Creates a range spanning from `start` position to `end` position.
	*
	* **Note:** This factory method creates its own {@link module:engine/view/position~ViewPosition} instances basing on passed values.
	*
	* @param start Start position.
	* @param end End position. If not set, range will be collapsed at `start` position.
	*/
	createRange(start: ViewPosition, end?: ViewPosition | null): ViewRange;
	/**
	* Creates a range that starts before given {@link module:engine/view/item~ViewItem view item} and ends after it.
	*/
	createRangeOn(item: ViewItem): ViewRange;
	/**
	* Creates a range inside an {@link module:engine/view/element~ViewElement element} which starts before the first child of
	* that element and ends after the last child of that element.
	*
	* @param element Element which is a parent for the range.
	*/
	createRangeIn(element: ViewElement | ViewDocumentFragment): ViewRange;
	/**
	* Creates new {@link module:engine/view/selection~ViewSelection} instance.
	*
	* ```ts
	* // Creates collapsed selection at the position of given item and offset.
	* const paragraph = writer.createContainerElement( 'p' );
	* const selection = writer.createSelection( paragraph, offset );
	*
	* // Creates a range inside an {@link module:engine/view/element~ViewElement element} which starts before the
	* // first child of that element and ends after the last child of that element.
	* const selection = writer.createSelection( paragraph, 'in' );
	*
	* // Creates a range on an {@link module:engine/view/item~ViewItem item} which starts before the item and ends
	* // just after the item.
	* const selection = writer.createSelection( paragraph, 'on' );
	* ```
	*
	* `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.
	*
	* ```ts
	* // Creates backward selection.
	* const selection = writer.createSelection( element, 'in', { backward: true } );
	* ```
	*
	* Fake selection does not render as browser native selection over selected elements and is hidden to the user.
	* This way, no native selection UI artifacts are displayed to the user and selection over elements can be
	* represented in other way, for example by applying proper CSS class.
	*
	* Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM
	* (and be  properly handled by screen readers).
	*
	* ```ts
	* // Creates fake selection with label.
	* const selection = writer.createSelection( element, 'in', { fake: true, label: 'foo' } );
	* ```
	*
	* See also: {@link #createSelection:SELECTABLE `createSelection( selectable, options )`}.
	*
	* @label NODE_OFFSET
	*/
	createSelection(selectable: ViewNode, placeOrOffset: ViewPlaceOrOffset, options?: ViewSelectionOptions): ViewSelection;
	/**
	* Creates new {@link module:engine/view/selection~ViewSelection} instance.
	*
	* ```ts
	* // Creates empty selection without ranges.
	* const selection = writer.createSelection();
	*
	* // Creates selection at the given range.
	* const range = writer.createRange( start, end );
	* const selection = writer.createSelection( range );
	*
	* // Creates selection at the given ranges
	* const ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];
	* const selection = writer.createSelection( ranges );
	*
	* // Creates selection from the other selection.
	* const otherSelection = writer.createSelection();
	* const selection = writer.createSelection( otherSelection );
	*
	* // Creates selection from the document selection.
	* const selection = writer.createSelection( editor.editing.view.document.selection );
	*
	* // Creates selection at the given position.
	* const position = writer.createPositionFromPath( root, path );
	* const selection = writer.createSelection( position );
	* ```
	*
	* `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.
	*
	* ```ts
	* // Creates backward selection.
	* const selection = writer.createSelection( range, { backward: true } );
	* ```
	*
	* Fake selection does not render as browser native selection over selected elements and is hidden to the user.
	* This way, no native selection UI artifacts are displayed to the user and selection over elements can be
	* represented in other way, for example by applying proper CSS class.
	*
	* Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM
	* (and be  properly handled by screen readers).
	*
	* ```ts
	* // Creates fake selection with label.
	* const selection = writer.createSelection( range, { fake: true, label: 'foo' } );
	* ```
	*
	* See also: {@link #createSelection:NODE_OFFSET `createSelection( node, placeOrOffset, options )`}.
	*
	* @label SELECTABLE
	*/
	createSelection(selectable?: Exclude<ViewSelectable, ViewNode>, option?: ViewSelectionOptions): ViewSelection;
	/**
	* Creates placeholders for child elements of the {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToStructure
	* `elementToStructure()`} conversion helper.
	*
	* ```ts
	* const viewSlot = conversionApi.writer.createSlot();
	* const viewPosition = conversionApi.writer.createPositionAt( viewElement, 0 );
	*
	* conversionApi.writer.insert( viewPosition, viewSlot );
	* ```
	*
	* It could be filtered down to a specific subset of children (only `<foo>` model elements in this case):
	*
	* ```ts
	* const viewSlot = conversionApi.writer.createSlot( node => node.is( 'element', 'foo' ) );
	* const viewPosition = conversionApi.writer.createPositionAt( viewElement, 0 );
	*
	* conversionApi.writer.insert( viewPosition, viewSlot );
	* ```
	*
	* While providing a filtered slot, make sure to provide slots for all child nodes. A single node cannot be downcasted into
	* multiple slots.
	*
	* **Note**: You should not change the order of nodes. View elements should be in the same order as model nodes.
	*
	* @param modeOrFilter The filter for child nodes.
	* @returns The slot element to be placed in to the view structure while processing
	* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToStructure `elementToStructure()`}.
	*/
	createSlot(modeOrFilter?: "children" | DowncastSlotFilter): ViewElement;
	/**
	* Registers a slot factory.
	*
	* @internal
	* @param slotFactory The slot factory.
	*/
	_registerSlotFactory(slotFactory: (writer: ViewDowncastWriter, modeOrFilter: "children" | DowncastSlotFilter) => ViewElement): void;
	/**
	* Clears the registered slot factory.
	*
	* @internal
	*/
	_clearSlotFactory(): void;
	/**
	* Inserts a node or nodes at the specified position. Takes care of breaking attributes before insertion
	* and merging them afterwards if requested by the breakAttributes param.
	*
	* @param position Insertion position.
	* @param nodes Node or nodes to insert.
	* @param breakAttributes Whether attributes should be broken.
	* @returns Range around inserted nodes.
	*/
	private _insertNodes;
	/**
	* Wraps children with provided `wrapElement`. Only children contained in `parent` element between
	* `startOffset` and `endOffset` will be wrapped.
	*/
	private _wrapChildren;
	/**
	* Unwraps children from provided `unwrapElement`. Only children contained in `parent` element between
	* `startOffset` and `endOffset` will be unwrapped.
	*/
	private _unwrapChildren;
	/**
	* Helper function for `view.writer.wrap`. Wraps range with provided attribute element.
	* This method will also merge newly added attribute element with its siblings whenever possible.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not
	* an instance of {@link module:engine/view/attributeelement~ViewAttributeElement ViewAttributeElement}.
	*
	* @returns New range after wrapping, spanning over wrapping attribute element.
	*/
	private _wrapRange;
	/**
	* Helper function for {@link #wrap}. Wraps position with provided attribute element.
	* This method will also merge newly added attribute element with its siblings whenever possible.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not
	* an instance of {@link module:engine/view/attributeelement~ViewAttributeElement ViewAttributeElement}.
	*
	* @returns New position after wrapping.
	*/
	private _wrapPosition;
	/**
	* Helper function used by other `ViewDowncastWriter` methods. Breaks attribute elements at the boundaries of given range.
	*
	* @param range Range which `start` and `end` positions will be used to break attributes.
	* @param forceSplitText If set to `true`, will break text nodes even if they are directly in container element.
	* This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.
	* @returns New range with located at break positions.
	*/
	private _breakAttributesRange;
	/**
	* Helper function used by other `ViewDowncastWriter` methods. Breaks attribute elements at given position.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position
	* is placed inside {@link module:engine/view/emptyelement~ViewEmptyElement ViewEmptyElement}.
	*
	* Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position
	* is placed inside {@link module:engine/view/uielement~ViewUIElement UIElement}.
	*
	* @param position Position where to break attributes.
	* @param forceSplitText If set to `true`, will break text nodes even if they are directly in container element.
	* This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.
	* @returns New position after breaking the attributes.
	*/
	private _breakAttributes;
	/**
	* Stores the information that an {@link module:engine/view/attributeelement~ViewAttributeElement attribute element} was
	* added to the tree. Saves the reference to the group in the given element and updates the group, so other elements
	* from the group now keep a reference to the given attribute element.
	*
	* The clones group can be obtained using {@link module:engine/view/attributeelement~ViewAttributeElement#getElementsWithSameId}.
	*
	* Does nothing if added element has no {@link module:engine/view/attributeelement~ViewAttributeElement#id id}.
	*
	* @param element Attribute element to save.
	*/
	private _addToClonedElementsGroup;
	/**
	* Removes all the information about the given {@link module:engine/view/attributeelement~ViewAttributeElement attribute element}
	* from its clones group.
	*
	* Keep in mind, that the element will still keep a reference to the group (but the group will not keep a reference to it).
	* This allows to reference the whole group even if the element was already removed from the tree.
	*
	* Does nothing if the element has no {@link module:engine/view/attributeelement~ViewAttributeElement#id id}.
	*
	* @param element Attribute element to remove.
	*/
	private _removeFromClonedElementsGroup;
}
export {};