73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CHROME_BROWSER_UI_WEBUI_FILEICON_SOURCE_H_
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#define CHROME_BROWSER_UI_WEBUI_FILEICON_SOURCE_H_
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#include <string>
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#include "base/files/file_path.h"
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#include "base/macros.h"
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#include "base/task/cancelable_task_tracker.h"
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#include "chrome/browser/icon_manager.h"
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#include "content/public/browser/url_data_source.h"
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namespace gfx {
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class Image;
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}
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namespace content {
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class ResourceRequestInfo;
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}
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// FileIconSource is the gateway between network-level chrome:
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// requests for favicons and the history backend that serves these.
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class FileIconSource : public content::URLDataSource {
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public:
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FileIconSource();
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// content::URLDataSource implementation.
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std::string GetSource() const override;
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// void StartDataRequest(
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// const std::string& path,
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// const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
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// const content::URLDataSource::GotDataCallback& callback) override;
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std::string GetMimeType(const std::string&) const override;
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protected:
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~FileIconSource() override;
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// Once the |path| and |icon_size| has been determined from the request, this
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// function is called to perform the actual fetch. Declared as virtual for
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// testing.
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virtual void FetchFileIcon(
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const base::FilePath& path,
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float scale_factor,
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IconLoader::IconSize icon_size,
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const content::URLDataSource::GotDataCallback& callback);
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private:
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// Contains the necessary information for completing an icon fetch request.
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struct IconRequestDetails {
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IconRequestDetails();
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IconRequestDetails(const IconRequestDetails& other);
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~IconRequestDetails();
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// The callback to run with the response.
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content::URLDataSource::GotDataCallback callback;
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// The requested scale factor to respond with.
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float scale_factor;
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};
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// Called when favicon data is available from the history backend.
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void OnFileIconDataAvailable(const IconRequestDetails& details,
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gfx::Image* icon);
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// Tracks tasks requesting file icons.
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base::CancelableTaskTracker cancelable_task_tracker_;
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DISALLOW_COPY_AND_ASSIGN(FileIconSource);
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};
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#endif // CHROME_BROWSER_UI_WEBUI_FILEICON_SOURCE_H_
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