Type Editor / @type-editor/viewdesc / TrailingHackViewDesc / TrailingHackViewDesc

Class: TrailingHackViewDesc

A dummy desc used to tag trailing BR or IMG nodes created to work around contentEditable terribleness.

Browsers behave inconsistently with empty block elements or blocks ending without proper line breaks. These hack nodes ensure proper cursor placement and visual representation:

BR: Makes empty blocks or block ends properly display and accept cursor
IMG: Used as a separator in some cases to work around browser bugs

Extends

ViewDesc

Constructors

Constructor

new TrailingHackViewDesc(
   parent,
   children,
   dom,
   contentDOM): TrailingHackViewDesc;

Defined in: ViewDesc.ts:39

Creates a new ViewDesc instance.

Parameters

Parameter	Type	Description
`parent`	`ViewDesc`	The parent ViewDesc in the tree hierarchy
`children`	`ViewDesc`[]	Array of child ViewDesc instances
`dom`	`Node`	The DOM node this description wraps
`contentDOM`	`HTMLElement`	The DOM node that holds the child views. May be null for descs that don't have children.

Returns

TrailingHackViewDesc

Inherited from

ViewDesc.constructor

Properties

Property	Modifier	Type	Default value	Inherited from	Defined in
`_children`	`protected`	`ViewDesc`[]	`undefined`	`ViewDesc`.`_children`	ViewDesc.ts:28
`_contentDOM`	`readonly`	`HTMLElement`	`undefined`	`ViewDesc`.`_contentDOM`	ViewDesc.ts:24
`_dirty`	`protected`	`ViewDirtyState`	`ViewDirtyState.NOT_DIRTY`	`ViewDesc`.`_dirty`	ViewDesc.ts:25
`_dom`	`protected`	`Node`	`undefined`	`ViewDesc`.`_dom`	ViewDesc.ts:29
`_node`	`protected`	`Node_2`	`undefined`	`ViewDesc`.`_node`	ViewDesc.ts:26
`_parent`	`protected`	`ViewDesc`	`undefined`	`ViewDesc`.`_parent`	ViewDesc.ts:27

Accessors

border

Get Signature

get border(): number;

Defined in: ViewDesc.ts:181

For block nodes, this represents the space taken up by their start/end tokens.

Returns

number

Inherited from

ViewDesc.border

children

Get Signature

get children(): ViewDesc[];

Defined in: ViewDesc.ts:88

The child view descriptions of this view.

Returns

ViewDesc[]

Set Signature

set children(children): void;

Defined in: ViewDesc.ts:92

Parameters

Parameter	Type
`children`	`ViewDesc`[]

Returns

void

Inherited from

ViewDesc.children

contentDOM

Get Signature

get contentDOM(): HTMLElement;

Defined in: ViewDesc.ts:106

The DOM node that contains child content, if any.

Returns

HTMLElement

Inherited from

ViewDesc.contentDOM

contentLost

Get Signature

get contentLost(): boolean;

Defined in: ViewDesc.ts:134

Checks if the content DOM has been detached from the main DOM.

Returns

boolean

Inherited from

ViewDesc.contentLost

dirty

Get Signature

get dirty(): ViewDirtyState;

Defined in: ViewDesc.ts:59

The dirty state of this description. Can be NOT_DIRTY, CHILD_DIRTY, CONTENT_DIRTY, or NODE_DIRTY.

Returns

ViewDirtyState

Set Signature

set dirty(dirty): void;

Defined in: ViewDesc.ts:63

Parameters

Parameter	Type
`dirty`	`ViewDirtyState`

Returns

void

Inherited from

ViewDesc.dirty

dom

Get Signature

get dom(): Node;

Defined in: ViewDesc.ts:99

The DOM node this description represents.

Returns

Node

Inherited from

ViewDesc.dom

domAtom

Get Signature

get domAtom(): boolean;

Defined in: TrailingHackViewDesc.ts:23

Hack nodes are atomic and should not be split or entered.

Returns

boolean

Overrides

ViewDesc.domAtom

ignoreForCoords

Get Signature

get ignoreForCoords(): boolean;

Defined in: TrailingHackViewDesc.ts:30

IMG hack nodes should be ignored for coordinate calculations.

Returns

boolean

Overrides

ViewDesc.ignoreForCoords

ignoreForSelection

Get Signature

get ignoreForSelection(): boolean;

Defined in: ViewDesc.ts:127

Whether this view should be ignored for selection purposes.

Returns

boolean

Inherited from

ViewDesc.ignoreForSelection

node

Get Signature

get node(): Node_2;

Defined in: ViewDesc.ts:70

The ProseMirror node this description represents, if any.

Returns

Node_2

Inherited from

ViewDesc.node

nodeDOM

Get Signature

get nodeDOM(): Node;

Defined in: AbstractViewDesc.ts:22

The DOM node that directly represents this ProseMirror node. May differ from dom if outer decorations wrap it.

Returns

Node

The node DOM element, or null if this view doesn't have a direct node representation

Inherited from

ViewDesc.nodeDOM

parent

Get Signature

get parent(): ViewDesc;

Defined in: ViewDesc.ts:77

The parent view description in the tree.

Returns

ViewDesc

Set Signature

set parent(parent): void;

Defined in: ViewDesc.ts:81

Parameters

Parameter	Type
`parent`	`ViewDesc`

Returns

void

Inherited from

ViewDesc.parent

posAfter

Get Signature

get posAfter(): number;

Defined in: ViewDesc.ts:155

The document position just after this view.

Returns

number

Inherited from

ViewDesc.posAfter

posAtEnd

Get Signature

get posAtEnd(): number;

Defined in: ViewDesc.ts:162

The document position at the end of this view's content.

Returns

number

Inherited from

ViewDesc.posAtEnd

posAtStart

Get Signature

get posAtStart(): number;

Defined in: ViewDesc.ts:148

The document position at the start of this view's content.

Returns

number

Inherited from

ViewDesc.posAtStart

posBefore

Get Signature

get posBefore(): number;

Defined in: ViewDesc.ts:141

The document position just before this view.

Returns

number

Inherited from

ViewDesc.posBefore

side

Get Signature

get side(): number;

Defined in: ViewDesc.ts:185

Gets the side value which determines positioning behavior of the view.

Negative values: positioned before content
Zero: neutral positioning
Positive values: positioned after content

Returns

number

Inherited from

ViewDesc.side

size

Get Signature

get size(): number;

Defined in: ViewDesc.ts:169

The size of the content represented by this desc.

Returns

number

Inherited from

ViewDesc.size

Methods

descAt()

descAt(pos): ViewDesc;

Defined in: ViewDesc.ts:371

Find the desc for the node after the given pos, if any. (When a parent node overrode rendering, there might not be one.)

Parameters

Parameter	Type	Description
`pos`	`number`	The document position to search for

Returns

ViewDesc

The view description at that position, or undefined

Inherited from

ViewDesc.descAt

destroy()

destroy(): void;

Defined in: ViewDesc.ts:265

Destroys this view description and all its children, cleaning up references.

This method ensures proper cleanup even if exceptions occur during child destruction.

Returns

void

Inherited from

ViewDesc.destroy

domAfterPos()

domAfterPos(pos): Node;

Defined in: ViewDesc.ts:468

Gets the DOM node immediately after a given document position.

Parameters

Parameter	Type	Description
`pos`	`number`	The document position

Returns

Node

The DOM node after the position

Throws

RangeError if there's no node after the position

Inherited from

ViewDesc.domAfterPos

domFromPos()

domFromPos(pos, side): {
  atom?: number;
  node: Node;
  offset: number;
};

Defined in: ViewDesc.ts:408

Converts a document position to a DOM position.

The algorithm:

For leaf nodes: return the DOM node itself with atom marker
For container nodes: find which child contains the position
If inside a child: recurse into that child
If at boundary: adjust for zero-width widgets and find DOM position

Parameters

Parameter	Type	Description
`pos`	`number`	The document position (relative to this view's start)
`side`	`number`	Direction to favor (-1 for before, 0 for neutral, 1 for after)

Returns

{
  atom?: number;
  node: Node;
  offset: number;
}

Object containing the DOM node, offset, and optionally an atom marker

Name	Type	Defined in
`atom?`	`number`	ViewDesc.ts:409
`node`	`Node`	ViewDesc.ts:409
`offset`	`number`	ViewDesc.ts:409

Inherited from

ViewDesc.domFromPos

emptyChildAt()

emptyChildAt(side): boolean;

Defined in: ViewDesc.ts:452

Checks if there's an empty child at the start or end of this view.

Parameters

Parameter	Type	Description
`side`	`number`	Direction to check (-1 for start, 1 for end)

Returns

boolean

True if there's an empty child at the specified side

Inherited from

ViewDesc.emptyChildAt

getDesc()

getDesc(dom): ViewDesc;

Defined in: ViewDesc.ts:333

Gets a view description from a DOM node if it's a descendant of this description.

Parameters

Parameter	Type	Description
`dom`	`Node`	The DOM node to check

Returns

ViewDesc

The view description if it's a descendant, undefined otherwise

Inherited from

ViewDesc.getDesc

getType()

getType(): ViewDescType;

Defined in: TrailingHackViewDesc.ts:55

Returns

ViewDescType

Overrides

ViewDesc.getType

ignoreMutation()

ignoreMutation(mutation): boolean;

Defined in: ViewDesc.ts:509

Determines if a mutation can be safely ignored.

Parameters

Parameter	Type	Description
`mutation`	`ViewMutationRecord`	The mutation record to check

Returns

boolean

True if the mutation can be ignored, false if it needs processing

Inherited from

ViewDesc.ignoreMutation

isText()

isText(_text): boolean;

Defined in: ViewDesc.ts:549

Checks if this view represents text with a specific content.

Parameters

Parameter	Type	Description
`_text`	`string`	The text content to check against

Returns

boolean

True if this is a text view with the given content

Inherited from

ViewDesc.isText

localPosFromDOM()

localPosFromDOM(
   dom,
   offset,
   bias): number;

Defined in: ViewDesc.ts:316

Converts a DOM position within this view to a document position.

Uses two strategies:

If position is inside contentDOM: scans through children to find nearest view desc
If position is outside contentDOM: uses heuristics based on DOM structure

Parameters

Parameter	Type	Description
`dom`	`Node`	The DOM node where the position is
`offset`	`number`	The offset within the DOM node
`bias`	`number`	Direction bias for ambiguous positions (-1 for before, 1 for after)

Returns

number

The document position corresponding to the DOM position

Inherited from

ViewDesc.localPosFromDOM

markDirty()

markDirty(from, to): void;

Defined in: ViewDesc.ts:524

Marks a subtree that has been touched by a DOM change for redrawing.

The algorithm walks through children to find which ones overlap with the dirty range, then either:

Recursively marks the child if range is fully contained
Marks the child for full recreation if range partially overlaps

Parameters

Parameter	Type	Description
`from`	`number`	Start position of the dirty range
`to`	`number`	End position of the dirty range

Returns

void

Inherited from

ViewDesc.markDirty

markParentsDirty()

markParentsDirty(): void;

Defined in: ViewDesc.ts:557

Marks this description and its parents as dirty, propagating the dirty state up the tree. Sets the dirty level to CONTENT_DIRTY for the immediate parent and CHILD_DIRTY for ancestors.

Returns

void

Inherited from

ViewDesc.markParentsDirty

matchesHack()

matchesHack(nodeName): boolean;

Defined in: TrailingHackViewDesc.ts:50

Checks if this hack node matches a given node name.

Parameters

Parameter	Type	Description
`nodeName`	`string`	The node name to check (e.g., 'BR', 'IMG')

Returns

boolean

True if not dirty and names match

Overrides

ViewDesc.matchesHack

matchesMark()

matchesMark(_mark): boolean;

Defined in: ViewDesc.ts:214

Checks if this description matches a given mark.

Parameters

Parameter	Type	Description
`_mark`	`Mark`	The mark to check against

Returns

boolean

True if this description represents the given mark

Inherited from

ViewDesc.matchesMark

matchesNode()

matchesNode(
   _node,
   _outerDeco,
   _innerDeco): boolean;

Defined in: ViewDesc.ts:226

Checks if this description matches a given node with decorations.

Parameters

Parameter	Type	Description
`_node`	`Node_2`	The node to check against
`_outerDeco`	readonly `PmDecoration`[]	The outer decorations to check
`_innerDeco`	`DecorationSource`	The inner decoration source to check

Returns

boolean

True if this description represents the given node with matching decorations

Inherited from

ViewDesc.matchesNode

matchesWidget()

matchesWidget(_widget): boolean;

Defined in: ViewDesc.ts:199

Checks if this description matches a given widget decoration.

Parameters

Parameter	Type	Description
`_widget`	`PmDecoration`	The widget decoration to check against

Returns

boolean

True if this description represents the given widget

Inherited from

ViewDesc.matchesWidget

parseRange()

parseRange(
   from,
   to,
   base?): {
  from: number;
  fromOffset: number;
  node: Node;
  to: number;
  toOffset: number;
};

Defined in: ViewDesc.ts:435

Finds a DOM range in a single parent for a given changed range.

This method maps document positions to DOM child indices, which is needed for parsing changed content. It tries to optimize by recursing into a single child when the entire range fits inside it.

Parameters

Parameter	Type	Default value	Description
`from`	`number`	`undefined`	Start position of the range
`to`	`number`	`undefined`	End position of the range
`base`	`number`	`0`	Base offset for position calculations (default: 0)

Returns

{
  from: number;
  fromOffset: number;
  node: Node;
  to: number;
  toOffset: number;
}

Object containing the DOM node and offsets for the range

Name	Type	Defined in
`from`	`number`	ViewDesc.ts:437
`fromOffset`	`number`	ViewDesc.ts:437
`node`	`Node`	ViewDesc.ts:437
`to`	`number`	ViewDesc.ts:437
`toOffset`	`number`	ViewDesc.ts:437

Inherited from

ViewDesc.parseRange

parseRule()

parseRule(): {
  ignore: boolean;
};

Defined in: TrailingHackViewDesc.ts:40

These hack nodes should be ignored during parsing since they're not part of the document content.

Returns

{
  ignore: boolean;
}

Parse rule with ignore flag set

Name	Type	Defined in
`ignore`	`boolean`	TrailingHackViewDesc.ts:40

Overrides

ViewDesc.parseRule

posBeforeChild()

posBeforeChild(child): number;

Defined in: ViewDesc.ts:293

Calculates the document position just before a given child view.

Parameters

Parameter	Type	Description
`child`	`PmViewDesc`	The child view to locate

Returns

number

The document position before the child

Inherited from

ViewDesc.posBeforeChild

posFromDOM()

posFromDOM(
   dom,
   offset,
   bias): number;

Defined in: ViewDesc.ts:354

Converts a DOM position to a document position.

Parameters

Parameter	Type	Description
`dom`	`Node`	The DOM node containing the position
`offset`	`number`	The offset within the DOM node
`bias`	`number`	Direction bias for ambiguous positions

Returns

number

The document position, or -1 if not found

Inherited from

ViewDesc.posFromDOM

setDomNode()

protected setDomNode(dom): void;

Defined in: ViewDesc.ts:575

Sets the DOM node for this description and establishes the bidirectional link.

Parameters

Parameter	Type	Description
`dom`	`Node`	The DOM node to associate with this description

Returns

void

Inherited from

ViewDesc.setDomNode

setSelection()

setSelection(
   anchor,
   head,
   view,
   force?): void;

Defined in: ViewDesc.ts:492

Sets a selection within this view description or delegates to a child.

View descs are responsible for setting selections that fall entirely inside them, allowing custom node views to implement specialized selection behavior.

Strategy:

If selection is entirely within a child → delegate to that child
Otherwise → convert positions to DOM and apply selection

Parameters

Parameter	Type	Default value	Description
`anchor`	`number`	`undefined`	The anchor position of the selection
`head`	`number`	`undefined`	The head position of the selection
`view`	`PmEditorView`	`undefined`	The editor view
`force`	`boolean`	`false`	Whether to force the selection update even if it appears unchanged

Returns

void

Inherited from

ViewDesc.setSelection

stopEvent()

stopEvent(_event): boolean;

Defined in: ViewDesc.ts:256

Used by the editor's event handler to ignore events that come from certain descs.

Parameters

Parameter	Type	Description
`_event`	`Event`	The DOM event to check

Returns

boolean

True if the event should be stopped/ignored

Inherited from

ViewDesc.stopEvent

Class: TrailingHackViewDesc ​

Extends ​

Constructors ​

Constructor ​

Parameters ​

Returns ​

Inherited from ​

Properties ​

Accessors ​

border ​

Get Signature ​

Returns ​

Inherited from ​

children ​

Get Signature ​

Returns ​

Set Signature ​

Parameters ​

Returns ​

Inherited from ​

contentDOM ​

Get Signature ​

Returns ​

Inherited from ​

contentLost ​

Get Signature ​

Returns ​

Inherited from ​

dirty ​

Get Signature ​

Returns ​

Set Signature ​

Parameters ​

Returns ​

Inherited from ​

dom ​

Get Signature ​

Returns ​

Inherited from ​

domAtom ​

Get Signature ​

Returns ​

Overrides ​

ignoreForCoords ​

Get Signature ​

Returns ​

Overrides ​

ignoreForSelection ​

Get Signature ​

Returns ​

Inherited from ​

node ​

Get Signature ​

Returns ​

Inherited from ​

nodeDOM ​

Get Signature ​

Returns ​

Inherited from ​

parent ​

Get Signature ​

Returns ​

Set Signature ​

Parameters ​

Returns ​

Inherited from ​

posAfter ​

Get Signature ​

Returns ​

Inherited from ​

posAtEnd ​

Get Signature ​

Returns ​

Inherited from ​

posAtStart ​

Get Signature ​

Returns ​

Inherited from ​

posBefore ​

Get Signature ​

Class: TrailingHackViewDesc

Extends

Constructors

Constructor

Parameters

Returns

Inherited from

Properties

Accessors

border

Get Signature

Returns

Inherited from

children

Get Signature

Returns

Set Signature

Parameters

Returns

Inherited from

contentDOM

Get Signature

Returns

Inherited from

contentLost

Get Signature

Returns

Inherited from

dirty

Get Signature

Returns

Set Signature

Parameters

Returns

Inherited from

dom

Get Signature

Returns

Inherited from

domAtom

Get Signature

Returns

Overrides

ignoreForCoords

Get Signature

Returns

Overrides

ignoreForSelection

Get Signature

Returns

Inherited from

node

Get Signature

Returns

Inherited from

nodeDOM

Get Signature

Returns

Inherited from

parent

Get Signature

Returns

Set Signature

Parameters

Returns

Inherited from

posAfter

Get Signature

Returns

Inherited from

posAtEnd

Get Signature

Returns

Inherited from

posAtStart

Get Signature

Returns

Inherited from

posBefore

Get Signature