| // 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. |
| |
| #ifndef CHROME_BROWSER_UI_WEBUI_FAVICON_SOURCE_H_ |
| #define CHROME_BROWSER_UI_WEBUI_FAVICON_SOURCE_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/task/cancelable_task_tracker.h" |
| #include "components/favicon/core/favicon_service.h" |
| #include "components/favicon_base/favicon_request_metrics.h" |
| #include "content/public/browser/url_data_source.h" |
| #include "ui/gfx/favicon_size.h" |
| |
| class Profile; |
| |
| namespace base { |
| class RefCountedMemory; |
| } |
| |
| namespace ui { |
| class NativeTheme; |
| } |
| |
| // FaviconSource is the gateway between network-level chrome: |
| // requests for favicons and the history backend that serves these. |
| // |
| // Format: |
| // chrome://favicon/size&scalefactor/iconurl/url |
| // Some parameters are optional as described below. However, the order of the |
| // parameters is not interchangeable. |
| // |
| // Parameter: |
| // 'url' Required |
| // Specifies the page URL of the requested favicon. If the 'iconurl' |
| // parameter is specified, the URL refers to the URL of the favicon image |
| // instead. |
| // 'size&scalefactor' Optional |
| // Values: ['size/aa@bx/'] |
| // Specifies the requested favicon's size in DIP (aa) and the requested |
| // favicon's scale factor. (b). |
| // The supported requested DIP sizes are: 16x16, 32x32 and 64x64. |
| // If the parameter is unspecified, the requested favicon's size defaults |
| // to 16 and the requested scale factor defaults to 1x. |
| // Example: chrome://favicon/size/16@2x/https://www.google.com/ |
| // 'iconurl' Optional |
| // Values: ['iconurl'] |
| // 'iconurl': Specifies that the url parameter refers to the URL of |
| // the favicon image as opposed to the URL of the page that the favicon is |
| // on. |
| // Example: chrome://favicon/iconurl/https://www.google.com/favicon.ico |
| class FaviconSource : public content::URLDataSource { |
| public: |
| // |type| is the type of icon this FaviconSource will provide. |
| explicit FaviconSource(Profile* profile); |
| |
| ~FaviconSource() override; |
| |
| // content::URLDataSource implementation. |
| std::string GetSource() const override; |
| void StartDataRequest( |
| const std::string& path, |
| const content::ResourceRequestInfo::WebContentsGetter& wc_getter, |
| const content::URLDataSource::GotDataCallback& callback) override; |
| std::string GetMimeType(const std::string&) const override; |
| bool AllowCaching() const override; |
| bool ShouldReplaceExistingSource() const override; |
| bool ShouldServiceRequest(const GURL& url, |
| content::ResourceContext* resource_context, |
| int render_process_id) const override; |
| |
| protected: |
| struct IconRequest { |
| IconRequest(); |
| IconRequest(const content::URLDataSource::GotDataCallback& cb, |
| const GURL& path, |
| int size, |
| float scale, |
| favicon::FaviconRequestOrigin origin); |
| IconRequest(const IconRequest& other); |
| ~IconRequest(); |
| |
| content::URLDataSource::GotDataCallback callback; |
| GURL request_path; |
| int size_in_dip; |
| float device_scale_factor; |
| favicon::FaviconRequestOrigin icon_request_origin; |
| }; |
| |
| // Called when the favicon data is missing to perform additional checks to |
| // locate the resource. |
| // |request| contains information for the failed request. |
| // Returns true if the missing resource is found. |
| virtual bool HandleMissingResource(const IconRequest& request); |
| |
| // Exposed for testing. |
| virtual ui::NativeTheme* GetNativeTheme(); |
| virtual base::RefCountedMemory* LoadIconBytes(const IconRequest& request, |
| int resource_id); |
| |
| Profile* profile_; |
| |
| private: |
| // Defines the allowed pixel sizes for requested favicons. |
| enum IconSize { |
| SIZE_16, |
| SIZE_32, |
| SIZE_64, |
| NUM_SIZES |
| }; |
| |
| // Called when favicon data is available from the history backend. |
| void OnFaviconDataAvailable( |
| const IconRequest& request, |
| const favicon_base::FaviconRawBitmapResult& bitmap_result); |
| |
| // Sends the 16x16 DIP 1x default favicon. |
| void SendDefaultResponse( |
| const content::URLDataSource::GotDataCallback& callback); |
| |
| // Sends the default favicon. |
| void SendDefaultResponse(const IconRequest& request); |
| |
| base::CancelableTaskTracker cancelable_task_tracker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FaviconSource); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_FAVICON_SOURCE_H_ |