Componentize component_updater: Move over a bunch of files to the component.

chrome/browser/component_updater/component_patcher_operation.h

-// Copyright 2013 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_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/compiler_specific.h"
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "chrome/browser/component_updater/component_unpacker.h"
-
-namespace base {
-class DictionaryValue;
-}  // namespace base
-
-namespace component_updater {
-
-extern const char kOp[];
-extern const char kBsdiff[];
-extern const char kCourgette[];
-extern const char kInput[];
-extern const char kPatch[];
-
-class ComponentInstaller;
-
-class DeltaUpdateOp : public base::RefCountedThreadSafe<DeltaUpdateOp> {
- public:
-  DeltaUpdateOp();
-
-  // Parses, runs, and verifies the operation. Calls |callback| with the
-  // result of the operation. The callback is called using |task_runner|.
-  void Run(const base::DictionaryValue* command_args,
-           const base::FilePath& input_dir,
-           const base::FilePath& unpack_dir,
-           ComponentInstaller* installer,
-           const ComponentUnpacker::Callback& callback,
-           scoped_refptr<base::SequencedTaskRunner> task_runner);
-
- protected:
-  virtual ~DeltaUpdateOp();
-
-  scoped_refptr<base::SequencedTaskRunner> GetTaskRunner();
-
-  std::string output_sha256_;
-  base::FilePath output_abs_path_;
-
- private:
-  friend class base::RefCountedThreadSafe<DeltaUpdateOp>;
-
-  ComponentUnpacker::Error CheckHash();
-
-  // Subclasses must override DoParseArguments to parse operation-specific
-  // arguments. DoParseArguments returns DELTA_OK on success; any other code
-  // represents failure.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      const base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) = 0;
-
-  // Subclasses must override DoRun to actually perform the patching operation.
-  // They must call the provided callback when they have completed their
-  // operations. In practice, the provided callback is always for "DoneRunning".
-  virtual void DoRun(const ComponentUnpacker::Callback& callback) = 0;
-
-  // Callback given to subclasses for when they complete their operation.
-  // Validates the output, and posts a task to the patching operation's
-  // callback.
-  void DoneRunning(ComponentUnpacker::Error error, int extended_error);
-
-  ComponentUnpacker::Callback callback_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOp);
-};
-
-// A 'copy' operation takes a file currently residing on the disk and moves it
-// into the unpacking directory: this represents "no change" in the file being
-// installed.
-class DeltaUpdateOpCopy : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpCopy();
-
- private:
-  virtual ~DeltaUpdateOpCopy();
-
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      const base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual void DoRun(const ComponentUnpacker::Callback& callback) OVERRIDE;
-
-  base::FilePath input_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpCopy);
-};
-
-// A 'create' operation takes a full file that was sent in the delta update
-// archive and moves it into the unpacking directory: this represents the
-// addition of a new file, or a file so different that no bandwidth could be
-// saved by transmitting a differential update.
-class DeltaUpdateOpCreate : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpCreate();
-
- private:
-  virtual ~DeltaUpdateOpCreate();
-
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      const base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual void DoRun(const ComponentUnpacker::Callback& callback) OVERRIDE;
-
-  base::FilePath patch_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpCreate);
-};
-
-// An interface an embedder may fulfill to enable out-of-process patching.
-class OutOfProcessPatcher
-    : public base::RefCountedThreadSafe<OutOfProcessPatcher> {
- public:
-  virtual void Patch(const std::string& operation,
-                     scoped_refptr<base::SequencedTaskRunner> task_runner,
-                     base::FilePath& input_abs_path,
-                     base::FilePath& patch_abs_path,
-                     base::FilePath& output_abs_path,
-                     base::Callback<void(int result)> callback) = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<OutOfProcessPatcher>;
-
-  virtual ~OutOfProcessPatcher() {}
-};
-
-// Both 'bsdiff' and 'courgette' operations take an existing file on disk,
-// and a bsdiff- or Courgette-format patch file provided in the delta update
-// package, and run bsdiff or Courgette to construct an output file in the
-// unpacking directory.
-class DeltaUpdateOpPatch : public DeltaUpdateOp {
- public:
-  // |out_of_process_patcher| may be NULL.
-  DeltaUpdateOpPatch(const std::string& operation,
-                     scoped_refptr<OutOfProcessPatcher> out_of_process_patcher);
-
- private:
-  virtual ~DeltaUpdateOpPatch();
-
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      const base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual void DoRun(const ComponentUnpacker::Callback& callback) OVERRIDE;
-
-  // |success_code| is the code that indicates a successful patch.
-  // |result| is the code the patching operation returned.
-  void DonePatching(const ComponentUnpacker::Callback& callback, int result);
-
-  std::string operation_;
-  scoped_refptr<OutOfProcessPatcher> out_of_process_patcher_;
-  base::FilePath patch_abs_path_;
-  base::FilePath input_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpPatch);
-};
-
-DeltaUpdateOp* CreateDeltaUpdateOp(
-    const std::string& operation,
-    scoped_refptr<OutOfProcessPatcher> out_of_process_patcher);
-
-}  // namespace component_updater
-
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_