| // Copyright 2014 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 ATHENA_CONTENT_CONTENT_PROXY_H_ |
| #define ATHENA_CONTENT_CONTENT_PROXY_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted_memory.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/weak_ptr.h" |
| #include "ui/gfx/image/image_skia.h" |
| |
| namespace views { |
| class WebView; |
| } |
| |
| namespace athena { |
| |
| class ProxyImageData; |
| |
| // This object creates and holds proxy content which gets shown instead of the |
| // actual web content, generated from the passed |web_view|. |
| // The created |proxy_content_| will be destroyed with the destruction of this |
| // object. |
| // Calling EvictContent() will release the rendered content. |
| // When ContentGetsDestroyed() gets called, the old view will be made visible |
| // and then the link to the |web_view_| will get severed. |
| class ContentProxy { |
| public: |
| // Creates the object by creating a sized down |web_view| layer. |
| explicit ContentProxy(views::WebView* web_view); |
| // TODO(skuhne): Add a function to create this object from a passed PNG, so |
| // that we can create it from a session restore. |
| |
| // With the destruction of the object, the layer should get destroyed and the |
| // content should become visible again. |
| virtual ~ContentProxy(); |
| |
| // Called when the content will get unloaded. |
| void ContentWillUnload(); |
| |
| // Can be called to save resources by creating a layer with a solid color |
| // instead of creating a content image layer. |
| // Note: Currently the GPU does create a full size texture and fills it with |
| // the given color - so there isn't really memory savings yet. |
| void EvictContent(); |
| |
| // Get the image of the content. If there is no image known, an empty image |
| // will be returned. |
| gfx::ImageSkia GetContentImage(); |
| |
| // The content is about to get destroyed by its creator. |
| // Note: This function should only be used by AppActivity. |
| void OnPreContentDestroyed(); |
| |
| private: |
| // Make the original (web)content visible. This call should only be paired |
| // with HideOriginalContent. |
| void ShowOriginalContent(); |
| |
| // Make the content invisible. This call should only be paired with |
| // MakeVisible. |
| void HideOriginalContent(); |
| |
| // Creates proxy content from |web_view_|. |
| void CreateProxyContent(); |
| |
| // Creates an image from the current content. |
| bool CreateContentImage(); |
| |
| // Called once the content was read back. |
| void OnContentImageRead(bool success, const SkBitmap& bitmap); |
| |
| // Called once the image content has been converted to PNG. |
| void OnContentImageEncodeComplete(scoped_refptr<ProxyImageData> image); |
| |
| // The web view which was passed on creation and is associated with this |
| // object. It will be shown when OnPreContentDestroyed() gets called and then |
| // set to NULL. The ownership remains with the creator. |
| views::WebView* web_view_; |
| |
| // While we are doing our PNG encode, we keep the read back image to have |
| // something which we can pass back to the overview mode. (It would make no |
| // sense to the user to see that more recent windows get painted later than |
| // older ones). |
| gfx::ImageSkia raw_image_; |
| |
| // True if the content is visible. |
| bool content_visible_; |
| |
| // True if the content is loaded and needs a re-layout when it gets shown |
| // again. |
| bool content_loaded_; |
| |
| // True if a content creation was kicked off once. This ensures that the |
| // function is never called twice. |
| bool content_creation_called_; |
| |
| // The PNG image data. |
| scoped_refptr<base::RefCountedBytes> png_data_; |
| |
| // Creating an encoded image from the content will be asynchronous. Use a |
| // weakptr for the callback to make sure that the read back / encoding image |
| // completion callback does not trigger on a destroyed ContentProxy. |
| base::WeakPtrFactory<ContentProxy> proxy_content_to_image_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ContentProxy); |
| }; |
| |
| } // namespace athena |
| |
| #endif // ATHENA_CONTENT_CONTENT_PROXY_H_ |