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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 <stdint.h>
#include <map>
#include <memory>
#include <set>
#include <string>
#include "base/files/file.h"
#include "base/macros.h"
#include "base/memory/singleton.h"
#include "base/process/process.h"
#include "content/common/download/mhtml_save_status.h"
#include "content/public/common/mhtml_generation_params.h"
#include "ipc/ipc_platform_file.h"
namespace base {
class FilePath;
}
namespace content {
class RenderFrameHostImpl;
class WebContents;
// The class and all of its members live on the UI thread. Only static methods
// are executed on other threads.
//
// MHTMLGenerationManager is a singleton. Each call to SaveMHTML method creates
// a new instance of MHTMLGenerationManager::Job that tracks generation of a
// single MHTML file.
class MHTMLGenerationManager {
public:
static MHTMLGenerationManager* GetInstance();
// GenerateMHTMLCallback is called to report completion and status of MHTML
// generation. On success |file_size| indicates the size of the
// generated file. On failure |file_size| is -1.
using GenerateMHTMLCallback = base::OnceCallback<void(int64_t file_size)>;
// Instructs the RenderFrames in |web_contents| to generate a MHTML
// representation of the current page.
void SaveMHTML(WebContents* web_contents,
const MHTMLGenerationParams& params,
GenerateMHTMLCallback callback);
// Handler for FrameHostMsg_SerializeAsMHTMLResponse (a notification from the
// renderer that the MHTML generation finished for a single frame).
void OnSerializeAsMHTMLResponse(
RenderFrameHostImpl* sender,
int job_id,
MhtmlSaveStatus save_status,
const std::set<std::string>& digests_of_uris_of_serialized_resources,
base::TimeDelta renderer_main_thread_time);
private:
friend struct base::DefaultSingletonTraits<MHTMLGenerationManager>;
class Job;
MHTMLGenerationManager();
virtual ~MHTMLGenerationManager();
// Called on the file thread to create |file|.
static base::File CreateFile(const base::FilePath& file_path);
// Called on the UI thread when the file that should hold the MHTML data has
// been created.
void OnFileAvailable(int job_id, base::File browser_file);
// Called on the UI thread when a job has been finished.
void JobFinished(Job* job, MhtmlSaveStatus save_status);
// Called on the UI thread after the file got finalized and we have its size.
void OnFileClosed(
int job_id,
const std::tuple<MhtmlSaveStatus, int64_t>& save_status_size);
// Creates and registers a new job.
Job* NewJob(WebContents* web_contents,
const MHTMLGenerationParams& params,
GenerateMHTMLCallback callback);
// Finds job by id. Returns nullptr if no job with a given id was found.
Job* FindJob(int job_id);
// Called when the render process connected to a job exits.
void RenderProcessExited(Job* job);
std::map<int, std::unique_ptr<Job>> id_to_job_;
int next_job_id_;
DISALLOW_COPY_AND_ASSIGN(MHTMLGenerationManager);
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_MHTML_GENERATION_MANAGER_H_
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