| // Copyright 2017 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. |
| |
| #ifndef CONTENT_BROWSER_ANDROID_RENDER_WIDGET_HOST_CONNECTOR_H_ |
| #define CONTENT_BROWSER_ANDROID_RENDER_WIDGET_HOST_CONNECTOR_H_ |
| |
| #include "base/gtest_prod_util.h" |
| #include "base/memory/weak_ptr.h" |
| #include "content/browser/renderer_host/render_widget_host_view_android.h" |
| #include "content/public/browser/web_contents_observer.h" |
| |
| namespace content { |
| |
| // A base class used to connect an object of the content layer lifecycle |
| // to |RenderWidgetHostViewAndroid|. The inherting class needs to |
| // override |UpdateRenderProcessConnection| to set itself to the RWHVA |
| // brought up foreground, and null out its reference in the RWHVA going |
| // away so it won't access the object any more. |
| // This class owns itself and gets deleted when the WebContents is deleted. |
| // Can also delete this object early (before the WebContents is destroyed) |
| // by calling Destroy directly. |
| class RenderWidgetHostConnector { |
| public: |
| explicit RenderWidgetHostConnector(WebContents* web_contents); |
| virtual ~RenderWidgetHostConnector(); |
| |
| // Establish initial connection to rwhva if it is present. |
| void Initialize(); |
| |
| // Method to set itself to the |new_rwhva|, and null out the reference |
| // in |old_rwvha|. Example: |
| // |
| // if (old_rwhva) |
| // old_rwhva->set_object(nullptr); |
| // if (new_rwhva) |
| // new_rwhva->set_object(this); |
| virtual void UpdateRenderProcessConnection( |
| RenderWidgetHostViewAndroid* old_rwhva, |
| RenderWidgetHostViewAndroid* new_rhwva) = 0; |
| |
| RenderWidgetHostViewAndroid* GetRWHVAForTesting() const; |
| |
| protected: |
| FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostConnectorTest, DestroyEarly); |
| |
| WebContents* web_contents() const; |
| |
| // Deletes this now. Note this is usually not required as this is |
| // deleted when the corresponding WebContents is destroyed. |
| void DestroyEarly(); |
| |
| private: |
| class Observer; |
| std::unique_ptr<Observer> render_widget_observer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostConnector); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_ANDROID_RENDER_WIDGET_HOST_CONNECTOR_H_ |