Class KeyFinder

constructor

• new KeyFinder(
      context: IExceptionContext,
      key: (rowIndex: number) => string,
  ): KeyFinder

• constructor for fast key based row access

  Parameters

  • context: IExceptionContext

    context to use
  • key: (rowIndex: number) => string

    key function

  Returns KeyFinder

Readonlycontext

Readonlykey

exceptionHeightOf

• exceptionHeightOf(index: number, returnDefault?: boolean): null | number

• see heightOf but ignores padding and optional null in case of default height

  Parameters

  • index: number

    row index
  • OptionalreturnDefault: boolean

    return null if default height

  Returns null | number
• exceptionHeightOf(index: number, returnDefault: true): number

• see heightOf but ignores padding and optional null in case of default height

  Parameters

  • index: number

    row index
  • returnDefault: true

    return null if default height

  Returns number

heightOf

• heightOf(index: number): number

• returns the height of the row identified by index

  Parameters

  • index: number

  Returns number

padding

• padding(index: number): number

• padding of the given index

  Parameters

  • index: number

  Returns number

pos

• pos(index: number): number

• returns the position of the given index

  Parameters

  • index: number

    index to look for

  Returns number

posByKey

• posByKey(key: string): { index: number; pos: number }

• returns the position of the given given or -1 if not found

  Parameters

  • key: string

  Returns { index: number; pos: number }

positions

• positions(
      first: number,
      last: number,
      offset: number,
      callback?: (index: number, key: string, pos: number) => void,
  ): void

• computes the positions and keys for a range of given indices

  Parameters

  • first: number

    first row index
  • last: number

    last row index
  • offset: number

    pos offset for the first row index
  • Optionalcallback: (index: number, key: string, pos: number) => void

    callback for each identified index

  Returns void