| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_UI_SAD_TAB_HELPER_H_ |
| #define CHROME_BROWSER_UI_SAD_TAB_HELPER_H_ |
| |
| #include <memory> |
| |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| class SadTab; |
| |
| // Per-tab class to manage sad tab views. The sad tab view appears when the main |
| // frame of a WebContents has crashed. The behaviour depends on whether |
| // content::ShouldSkipEarlyCommitPendingForCrashedFrame is true or not. |
| // |
| // TODO(crbug.com/40052076): The early commit path is being removed, tidy |
| // these docs when that happens. |
| // |
| // If we are doing the early commit then the sad tab is removed when |
| // WebContentsObserver::RenderViewReady is signalled and does not come back |
| // unless the new frame also crashes. |
| // |
| // If we are not doing the early commit then the sad tab is removed when the new |
| // frame is created but the new frame is left invisible, this leaves the empty |
| // WebContents displaying. If the new frame commits, it becomes visible. If the |
| // commit is aborted, we reinstate the sad tab. |
| // |
| class SadTabHelper : public content::WebContentsObserver, |
| public content::WebContentsUserData<SadTabHelper> { |
| public: |
| SadTabHelper(const SadTabHelper&) = delete; |
| SadTabHelper& operator=(const SadTabHelper&) = delete; |
| |
| ~SadTabHelper() override; |
| |
| SadTab* sad_tab() { return sad_tab_.get(); } |
| |
| // Called when the sad tab needs to be reinstalled in the WebView, |
| // for example because a tab was activated, or because a tab was |
| // dragged to a new browser window. |
| void ReinstallInWebView(); |
| |
| private: |
| friend class content::WebContentsUserData<SadTabHelper>; |
| |
| explicit SadTabHelper(content::WebContents* web_contents); |
| |
| void InstallSadTab(base::TerminationStatus status); |
| |
| // Overridden from content::WebContentsObserver: |
| void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override; |
| void PrimaryMainFrameRenderProcessGone( |
| base::TerminationStatus status) override; |
| void RenderViewReady() override; |
| void DidFinishNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| |
| std::unique_ptr<SadTab> sad_tab_; |
| |
| WEB_CONTENTS_USER_DATA_KEY_DECL(); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_SAD_TAB_HELPER_H_ |