text: /*
   * Copyright (C) 2010 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_DOM_FILE_SYSTEM_H_
  #define THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_DOM_FILE_SYSTEM_H_
  
  #include "base/location.h"
  #include "third_party/blink/public/platform/task_type.h"
  #include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
  #include "third_party/blink/renderer/core/execution_context/execution_context.h"
  #include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
  #include "third_party/blink/renderer/modules/filesystem/dom_file_system_base.h"
  #include "third_party/blink/renderer/modules/modules_export.h"
  #include "third_party/blink/renderer/platform/heap/handle.h"
  
  namespace blink {
  
  class DirectoryEntry;
  class FileEntry;
  
  class MODULES_EXPORT DOMFileSystem final
      : public DOMFileSystemBase,
        public ActiveScriptWrappable<DOMFileSystem>,
        public ExecutionContextClient {
    DEFINE_WRAPPERTYPEINFO();
    USING_GARBAGE_COLLECTED_MIXIN(DOMFileSystem);
  
   public:
    // Creates a new isolated file system for the given filesystemId.
    static DOMFileSystem* CreateIsolatedFileSystem(ExecutionContext*,
                                                   const String& filesystem_id);
  
    DOMFileSystem(ExecutionContext*,
                  const String& name,
                  mojom::blink::FileSystemType,
                  const KURL& root_url);
  
    DirectoryEntry* root() const;
  
    // DOMFileSystemBase overrides.
    void AddPendingCallbacks() override;
    void RemovePendingCallbacks() override;
    void ReportError(ErrorCallback, base::File::Error error) override;
  
    static void ReportError(ExecutionContext*,
                            ErrorCallback,
                            base::File::Error error);
  
    // ScriptWrappable overrides.
    bool HasPendingActivity() const final;
  
    void CreateWriter(const FileEntry*,
                      FileWriterCallbacks::SuccessCallback,
                      FileWriterCallbacks::ErrorCallback);
    void CreateFile(const FileEntry*,
                    SnapshotFileCallback::SuccessCallback,
                    SnapshotFileCallback::ErrorCallback);
  
    // Schedule a callback. This should not cross threads (should be called on the
    // same context thread).
    static void ScheduleCallback(ExecutionContext* execution_context,
                                 base::OnceClosure task);
  
    void Trace(Visitor*) const override;
  
   private:
    static String TaskNameForInstrumentation() { return "FileSystem"; }
  
    int number_of_pending_callbacks_;
    Member<DirectoryEntry> root_entry_;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_DOM_FILE_SYSTEM_H_
  