| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/public/browser/web_contents_observer.h" |
| |
| #include "content/browser/web_contents/web_contents_impl.h" |
| #include "content/public/browser/navigation_details.h" |
| |
| namespace content { |
| |
| WebContentsObserver::WebContentsObserver(WebContents* web_contents) { |
| Observe(web_contents); |
| } |
| |
| WebContentsObserver::WebContentsObserver() = default; |
| |
| WebContentsObserver::~WebContentsObserver() { |
| if (web_contents_) |
| static_cast<WebContentsImpl*>(web_contents_)->RemoveObserver(this); |
| } |
| |
| WebContents* WebContentsObserver::web_contents() const { |
| return web_contents_; |
| } |
| |
| void WebContentsObserver::Observe(WebContents* web_contents) { |
| if (web_contents == web_contents_) { |
| // Early exit to avoid infinite loops if we're in the middle of a callback. |
| return; |
| } |
| if (web_contents_) |
| static_cast<WebContentsImpl*>(web_contents_)->RemoveObserver(this); |
| web_contents_ = web_contents; |
| if (web_contents_) { |
| static_cast<WebContentsImpl*>(web_contents_)->AddObserver(this); |
| } |
| } |
| |
| bool WebContentsObserver::OnMessageReceived( |
| const IPC::Message& message, |
| RenderFrameHost* render_frame_host) { |
| return false; |
| } |
| |
| void WebContentsObserver::ResetWebContents() { |
| static_cast<WebContentsImpl*>(web_contents_)->RemoveObserver(this); |
| web_contents_ = nullptr; |
| } |
| |
| } // namespace content |