BlockSuite API Documentation / @blocksuite/store / Y / RelativePosition

Class: RelativePosition

A relative position is based on the Yjs model and is not affected by document changes. E.g. If you place a relative position before a certain character, it will always point to this character. If you place a relative position at the end of a type, it will always point to the end of the type.

A numeric position is often unsuited for user selections, because it does not change when content is inserted before or after.

Insert(0, 'x')('a|bc') = 'xa|bc' Where | is the relative position.

One of the properties must be defined.

Example

// Current cursor position is at position 10
  const relativePosition = createRelativePositionFromIndex(yText, 10)
  // modify yText
  yText.insert(0, 'abc')
  yText.delete(3, 10)
  // Compute the cursor position
  const absolutePosition = createAbsolutePositionFromRelativePosition(y, relativePosition)
  absolutePosition.type === yText // => true
  console.log('cursor location is ' + absolutePosition.index) // => cursor location is 3

Constructors

new RelativePosition(type, tname, item, assoc)

new RelativePosition(type, tname, item, assoc?): RelativePosition

Parameters

• type: null | ID

• tname: null | string

• item: null | ID

• assoc?: number

Returns

RelativePosition

Source

node_modules/.pnpm/yjs@13.6.14/node_modules/yjs/dist/src/utils/RelativePosition.d.ts:32

Properties

assoc

assoc: number

A relative position is associated to a specific character. By default assoc >= 0, the relative position is associated to the character after the meant position. I.e. position 1 in 'ab' is associated to character 'b'.

If assoc < 0, then the relative position is associated to the caharacter before the meant position.

Source

node_modules/.pnpm/yjs@13.6.14/node_modules/yjs/dist/src/utils/RelativePosition.d.ts:56

---

item

item: null | ID

Source

node_modules/.pnpm/yjs@13.6.14/node_modules/yjs/dist/src/utils/RelativePosition.d.ts:44

---

tname

tname: null | string

Source

node_modules/.pnpm/yjs@13.6.14/node_modules/yjs/dist/src/utils/RelativePosition.d.ts:40

---

type

type: null | ID

Source

node_modules/.pnpm/yjs@13.6.14/node_modules/yjs/dist/src/utils/RelativePosition.d.ts:36