Method init

content_scripts/mode_visual.js:230–364

(options)

class VisualMode extends KeyHandlerMode {
  init(options) {
    let movement;
    if (options == null) {
      options = {};
    }
    this.movement = new Movement(options.alterMethod != null ? options.alterMethod : "extend");
    this.selection = this.movement.selection;

    // Build the key mapping structure required by KeyHandlerMode. This only handles one- and
    // two-key mappings.
    const keyMapping = {};
    for (const keys of Object.keys(this.movements || {})) {
      movement = this.movements[keys];
      if ("function" === typeof movement) {
        movement = movement.bind(this);
      }
      if (keys.length === 1) {
        keyMapping[keys] = { command: movement };
      } else { // keys.length == 2
        if (keyMapping[keys[0]] == null) {
          keyMapping[keys[0]] = {};
        }
        Object.assign(keyMapping[keys[0]], { [keys[1]]: { command: movement } });
      }
    }

    // Aliases and complex bindings.
    Object.assign(keyMapping, {
      "B": keyMapping.b,
      "W": keyMapping.w,
      "<c-e>": {
        command(count) {
          return Scroller.scrollBy("y", count * Settings.get("scrollStepSize"), 1, false);
        },
      },
      "<c-y>": {
        command(count) {
          return Scroller.scrollBy("y", -count * Settings.get("scrollStepSize"), 1, false);
        },
      },
    });

    super.init(Object.assign(options, {
      name: options.name != null ? options.name : "visual",
      indicator: options.indicator != null ? options.indicator : "Visual mode",
      // Visual mode, visual-line mode and caret mode each displace each other.
      singleton: "visual-mode-group",
      exitOnEscape: true,
      suppressAllKeyboardEvents: true,
      keyMapping,
      commandHandler: this.commandHandler.bind(this),
    }));

    // If there was a range selection when the user lanuched visual mode, then we retain the
    // selection on exit.
    this.shouldRetainSelectionOnExit = this.options.userLaunchedMode &&
      (this.selection.type === "Range");