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// 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 CONTENT_BROWSER_DOWNLOAD_MHTML_GENERATION_MANAGER_H_
#define CONTENT_BROWSER_DOWNLOAD_MHTML_GENERATION_MANAGER_H_
#include <map>
#include "base/memory/singleton.h"
#include "base/platform_file.h"
#include "base/process/process.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "ipc/ipc_platform_file.h"
namespace base {
class FilePath;
}
namespace content {
class WebContents;
class MHTMLGenerationManager : public NotificationObserver {
public:
static MHTMLGenerationManager* GetInstance();
typedef base::Callback<void(int64 /* size of the file */)>
GenerateMHTMLCallback;
// Instructs the render view to generate a MHTML representation of the current
// page for |web_contents|.
void SaveMHTML(WebContents* web_contents,
const base::FilePath& file,
const GenerateMHTMLCallback& callback);
// Instructs the render view to generate a MHTML representation of the current
// page for |web_contents|.
void StreamMHTML(WebContents* web_contents,
const base::PlatformFile file,
const GenerateMHTMLCallback& callback);
// Notification from the renderer that the MHTML generation finished.
// |mhtml_data_size| contains the size in bytes of the generated MHTML data,
// or -1 in case of failure.
void MHTMLGenerated(int job_id, int64 mhtml_data_size);
private:
friend struct DefaultSingletonTraits<MHTMLGenerationManager>;
struct Job{
Job();
~Job();
// The handles to file the MHTML is saved to, for the browser and renderer
// processes.
base::PlatformFile browser_file;
IPC::PlatformFileForTransit renderer_file;
// The IDs mapping to a specific contents.
int process_id;
int routing_id;
// The callback to call once generation is complete.
GenerateMHTMLCallback callback;
};
MHTMLGenerationManager();
virtual ~MHTMLGenerationManager();
// Called on the file thread to create |file|.
void CreateFile(int job_id,
const base::FilePath& file,
base::ProcessHandle renderer_process);
// Called on the UI thread when the file that should hold the MHTML data has
// been created. This returns a handle to that file for the browser process
// and one for the renderer process. These handles are
// kInvalidPlatformFileValue if the file could not be opened.
void FileHandleAvailable(int job_id,
base::PlatformFile browser_file,
IPC::PlatformFileForTransit renderer_file);
// Called on the file thread to close the file the MHTML was saved to.
void CloseFile(base::PlatformFile file);
// Called on the UI thread when a job has been processed (successfully or
// not). Closes the file and removes the job from the job map.
// |mhtml_data_size| is -1 if the MHTML generation failed.
void JobFinished(int job_id, int64 mhtml_data_size);
// Creates an register a new job.
int NewJob(WebContents* web_contents, const GenerateMHTMLCallback& callback);
// Implementation of NotificationObserver.
virtual void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) OVERRIDE;
typedef std::map<int, Job> IDToJobMap;
IDToJobMap id_to_job_;
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(MHTMLGenerationManager);
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_MHTML_GENERATION_MANAGER_H_
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