Method writeInternal

lib/terminal.ts:534–575

* Internal write implementation (extracted from write())

(data: string | Uint8Array, callback?: () => void)

   * Internal write implementation (extracted from write())
   */
  private writeInternal(data: string | Uint8Array, callback?: () => void): void {
    // Note: We intentionally do NOT clear selection on write - most modern terminals
    // preserve selection when new data arrives. Selection is cleared by user actions
    // like clicking or typing, not by incoming data.

    // Write directly to WASM terminal (handles VT parsing internally)
    this.wasmTerm!.write(data);

    // Process any responses generated by the terminal (e.g., DSR cursor position)
    // These need to be sent back to the PTY via onData
    this.processTerminalResponses();

    // Check for bell character (BEL, \x07)
    // WASM doesn't expose bell events, so we detect it in the data stream
    if (typeof data === 'string' && data.includes('\x07')) {
      this.bellEmitter.fire();
    } else if (data instanceof Uint8Array && data.includes(0x07)) {
      this.bellEmitter.fire();
    }

    // Invalidate link cache (content changed)
    this.linkDetector?.invalidateCache();

    // Phase 2: Auto-scroll to bottom on new output (xterm.js behavior)
    if (this.viewportY !== 0) {
      this.scrollToBottom();
    }

    // Check for title changes (OSC 0, 1, 2 sequences)
    // This is a simplified implementation - Ghostty WASM may provide this
    if (typeof data === 'string' && data.includes('\x1b]')) {
      this.checkForTitleChange(data);
    }

    // Call callback if provided
    if (callback) {
      // Queue callback after next render
      requestAnimationFrame(callback);
    }

    // Render will happen on next animation frame
  }

  /**
   * Write data with newline