Move browser-specific FileAPI code from webkit/fileapi to webkit/browser/fileapi

webkit/fileapi/file_system_operation_context.h

-// 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 WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_
-#define WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_
-
-#include "base/supports_user_data.h"
-#include "base/threading/thread_checker.h"
-#include "webkit/browser/fileapi/task_runner_bound_observer_list.h"
-#include "webkit/quota/quota_types.h"
-#include "webkit/storage/webkit_storage_export.h"
-
-namespace base {
-class SequencedTaskRunner;
-}
-
-namespace fileapi {
-
-class FileSystemContext;
-
-// A context class which is carried around by FileSystemOperation and
-// its delegated tasks. It is valid to reuse one context instance across
-// multiple operations as far as those operations are supposed to share
-// the same context (e.g. use the same task runner, share the quota etc).
-// Note that the remaining quota bytes (allowed_bytes_growth) may be
-// updated during the execution of write operations.
-class WEBKIT_STORAGE_EXPORT_PRIVATE FileSystemOperationContext
-    : public base::SupportsUserData {
- public:
-  explicit FileSystemOperationContext(FileSystemContext* context);
-
-  // Specifies |task_runner| which the operation is performed on.
-  FileSystemOperationContext(FileSystemContext* context,
-                             base::SequencedTaskRunner* task_runner);
-
-  virtual ~FileSystemOperationContext();
-
-  FileSystemContext* file_system_context() const {
-    return file_system_context_;
-  }
-
-  // Updates the current remaining quota.
-  // This can be called to update the remaining quota during the operation.
-  void set_allowed_bytes_growth(const int64& allowed_bytes_growth) {
-    allowed_bytes_growth_ = allowed_bytes_growth;
-  }
-
-  // Returns the current remaining quota.
-  int64 allowed_bytes_growth() const { return allowed_bytes_growth_; }
-
-  quota::QuotaLimitType quota_limit_type() const {
-    return quota_limit_type_;
-  }
-
-  // Returns TaskRunner which the operation is performed on.
-  base::SequencedTaskRunner* task_runner() const {
-    return task_runner_.get();
-  }
-
-  ChangeObserverList* change_observers() { return &change_observers_; }
-  AccessObserverList* access_observers() { return &access_observers_; }
-  UpdateObserverList* update_observers() { return &update_observers_; }
-
-  // Following setters should be called only on the same thread as the
-  // FileSystemOperationContext is created (i.e. are not supposed be updated
-  // after the context's passed onto other task runners).
-  void set_change_observers(const ChangeObserverList& list) {
-    DCHECK(setter_thread_checker_.CalledOnValidThread());
-    change_observers_ = list;
-  }
-  void set_access_observers(const AccessObserverList& list) {
-    DCHECK(setter_thread_checker_.CalledOnValidThread());
-    access_observers_ = list;
-  }
-  void set_update_observers(const UpdateObserverList& list) {
-    DCHECK(setter_thread_checker_.CalledOnValidThread());
-    update_observers_ = list;
-  }
-  void set_quota_limit_type(quota::QuotaLimitType limit_type) {
-    DCHECK(setter_thread_checker_.CalledOnValidThread());
-    quota_limit_type_ = limit_type;
-  }
-
-  // Gets and sets value-type (or not-owned) variable as UserData.
-  // (SetUserValue can be called only on the same thread as this context
-  // is created as well as other setters.)
-  template <typename T> T GetUserValue(const char* key) const {
-    ValueAdapter<T>* v = static_cast<ValueAdapter<T>*>(GetUserData(key));
-    return v ? v->value() : T();
-  }
-  template <typename T> void SetUserValue(const char* key, const T& value) {
-    DCHECK(setter_thread_checker_.CalledOnValidThread());
-    SetUserData(key, new ValueAdapter<T>(value));
-  }
-
- private:
-  // An adapter for setting a value-type (or not owned) data as UserData.
-  template <typename T> class ValueAdapter
-      : public base::SupportsUserData::Data {
-   public:
-    ValueAdapter(const T& value) : value_(value) {}
-    const T& value() const { return value_; }
-   private:
-    T value_;
-    DISALLOW_COPY_AND_ASSIGN(ValueAdapter);
-  };
-
-  FileSystemContext* file_system_context_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  int64 allowed_bytes_growth_;
-  quota::QuotaLimitType quota_limit_type_;
-
-  AccessObserverList access_observers_;
-  ChangeObserverList change_observers_;
-  UpdateObserverList update_observers_;
-
-  // Used to check its setters are not called on arbitrary thread.
-  base::ThreadChecker setter_thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(FileSystemOperationContext);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_FILE_SYSTEM_OPERATION_CONTEXT_H_