Method advanceCurrentMatch

src/cmd_line/commandLine.ts:529–541

* Called when or is pressed during SearchInProgress mode

(vimState: VimState, direction: SearchDirection)

   * Called when <C-g> or <C-t> is pressed during SearchInProgress mode
   */
  public advanceCurrentMatch(vimState: VimState, direction: SearchDirection): void {
    // <C-g> always moves forward in the document, and <C-t> always moves back, regardless of search direction.
    // To compensate, multiply the desired direction by the searchState's direction, so that
    // effectiveDirection == direction * (searchState.direction)^2 == direction.
    this.currentMatchDisplacement += this.searchState.direction * direction;

    // With nowrapscan, <C-g>/<C-t> shouldn't do anything if it would mean advancing past the last reachable match in the buffer.
    // We account for this by checking whether getCurrentMatchRange returns undefined once this.currentMatchDisplacement is advanced.
    // If it does, we undo the change to this.currentMatchDisplacement before exiting, making this command a noop.
    if (!configuration.wrapscan && !this.getCurrentMatchRange(vimState)) {
      this.currentMatchDisplacement -= this.searchState.direction * direction;
    }
  }
}