private _render()

in src/renderer/CursorRenderLayer.ts [114:176]
51 lines of code
15 McCabe index (conditional complexity)

  private _render(terminal: ITerminal, triggeredByAnimationFrame: boolean): void {
    // Don't draw the cursor if it's hidden
    if (!terminal.cursorState || terminal.cursorHidden) {
      this._clearCursor();
      return;
    }

    const cursorY = terminal.buffer.ybase + terminal.buffer.y;
    const viewportRelativeCursorY = cursorY - terminal.buffer.ydisp;

    // Don't draw the cursor if it's off-screen
    if (viewportRelativeCursorY < 0 || viewportRelativeCursorY >= terminal.rows) {
      this._clearCursor();
      return;
    }

    const charData = terminal.buffer.lines.get(cursorY).get(terminal.buffer.x);
    if (!charData) {
      return;
    }

    if (!terminal.isFocused) {
      this._clearCursor();
      this._ctx.save();
      this._ctx.fillStyle = this._colors.cursor.css;
      this._renderBlurCursor(terminal, terminal.buffer.x, viewportRelativeCursorY, charData);
      this._ctx.restore();
      this._state.x = terminal.buffer.x;
      this._state.y = viewportRelativeCursorY;
      this._state.isFocused = false;
      this._state.style = terminal.options.cursorStyle;
      this._state.width = charData[CHAR_DATA_WIDTH_INDEX];
      return;
    }

    // Don't draw the cursor if it's blinking
    if (this._cursorBlinkStateManager && !this._cursorBlinkStateManager.isCursorVisible) {
      this._clearCursor();
      return;
    }

    if (this._state) {
      // The cursor is already in the correct spot, don't redraw
      if (this._state.x === terminal.buffer.x &&
          this._state.y === viewportRelativeCursorY &&
          this._state.isFocused === terminal.isFocused &&
          this._state.style === terminal.options.cursorStyle &&
          this._state.width === charData[CHAR_DATA_WIDTH_INDEX]) {
        return;
      }
      this._clearCursor();
    }

    this._ctx.save();
    this._cursorRenderers[terminal.options.cursorStyle || 'block'](terminal, terminal.buffer.x, viewportRelativeCursorY, charData);
    this._ctx.restore();

    this._state.x = terminal.buffer.x;
    this._state.y = viewportRelativeCursorY;
    this._state.isFocused = false;
    this._state.style = terminal.options.cursorStyle;
    this._state.width = charData[CHAR_DATA_WIDTH_INDEX];
  }