public setMode()

in src/InputHandler.ts [1219:1329]
83 lines of code
27 McCabe index (conditional complexity)

  public setMode(params: number[], collect?: string): void {
    if (params.length > 1) {
      for (let i = 0; i < params.length; i++) {
        this.setMode([params[i]]);
      }

      return;
    }

    if (!collect) {
      switch (params[0]) {
        case 4:
          this._terminal.insertMode = true;
          break;
        case 20:
          // this._t.convertEol = true;
          break;
      }
    } else if (collect === '?') {
      switch (params[0]) {
        case 1:
          this._terminal.applicationCursor = true;
          break;
        case 2:
          this._terminal.setgCharset(0, DEFAULT_CHARSET);
          this._terminal.setgCharset(1, DEFAULT_CHARSET);
          this._terminal.setgCharset(2, DEFAULT_CHARSET);
          this._terminal.setgCharset(3, DEFAULT_CHARSET);
          // set VT100 mode here
          break;
        case 3: // 132 col mode
          this._terminal.savedCols = this._terminal.cols;
          this._terminal.resize(132, this._terminal.rows);
          break;
        case 6:
          this._terminal.originMode = true;
          break;
        case 7:
          this._terminal.wraparoundMode = true;
          break;
        case 12:
          // this.cursorBlink = true;
          break;
        case 66:
          this._terminal.log('Serial port requested application keypad.');
          this._terminal.applicationKeypad = true;
          this._terminal.viewport.syncScrollArea();
          break;
        case 9: // X10 Mouse
          // no release, no motion, no wheel, no modifiers.
        case 1000: // vt200 mouse
          // no motion.
          // no modifiers, except control on the wheel.
        case 1002: // button event mouse
        case 1003: // any event mouse
          // any event - sends motion events,
          // even if there is no button held down.

          // TODO: Why are params[0] compares nested within a switch for params[0]?

          this._terminal.x10Mouse = params[0] === 9;
          this._terminal.vt200Mouse = params[0] === 1000;
          this._terminal.normalMouse = params[0] > 1000;
          this._terminal.mouseEvents = true;
          this._terminal.element.classList.add('enable-mouse-events');
          this._terminal.selectionManager.disable();
          this._terminal.log('Binding to mouse events.');
          break;
        case 1004: // send focusin/focusout events
          // focusin: ^[[I
          // focusout: ^[[O
          this._terminal.sendFocus = true;
          break;
        case 1005: // utf8 ext mode mouse
          this._terminal.utfMouse = true;
          // for wide terminals
          // simply encodes large values as utf8 characters
          break;
        case 1006: // sgr ext mode mouse
          this._terminal.sgrMouse = true;
          // for wide terminals
          // does not add 32 to fields
          // press: ^[[<b;x;yM
          // release: ^[[<b;x;ym
          break;
        case 1015: // urxvt ext mode mouse
          this._terminal.urxvtMouse = true;
          // for wide terminals
          // numbers for fields
          // press: ^[[b;x;yM
          // motion: ^[[b;x;yT
          break;
        case 25: // show cursor
          this._terminal.cursorHidden = false;
          break;
        case 1049: // alt screen buffer cursor
          // TODO: Not sure if we need to save/restore after switching the buffer
          // this.saveCursor(params);
          // FALL-THROUGH
        case 47: // alt screen buffer
        case 1047: // alt screen buffer
          this._terminal.buffers.activateAltBuffer();
          this._terminal.viewport.syncScrollArea();
          this._terminal.showCursor();
          break;
        case 2004: // bracketed paste mode (https://cirw.in/blog/bracketed-paste)
          this._terminal.bracketedPasteMode = true;
          break;
      }
    }
  }