components/clipboard/clipboard_standalone_impl.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_CLIPBOARD_CLIPBOARD_STANDALONE_IMPL_H_
   6 #define COMPONENTS_CLIPBOARD_CLIPBOARD_STANDALONE_IMPL_H_
   7
   8 #include <base/memory/scoped_ptr.h>
   9 #include <string>
  10
  11 #include "components/clipboard/public/interfaces/clipboard.mojom.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
  13
  14 namespace clipboard {
  15
  16 // Stub clipboard implementation.
  17 //
  18 // Eventually, we'll actually want to interact with the system clipboard, but
  19 // that's hard today because the system clipboard is asynchronous (on X11), the
  20 // ui::Clipboard interface is synchronous (which is what we'd use), mojo is
  21 // asynchronous across processes, and the WebClipboard interface is synchronous
  22 // (which is at least tractable).
  23 class ClipboardStandaloneImpl : public mojo::Clipboard {
  24  public:
  25   // mojo::Clipboard exposes three possible clipboards.
  26   static const int kNumClipboards = 3;
  27
  28   explicit ClipboardStandaloneImpl(
  29       mojo::InterfaceRequest<mojo::Clipboard> request);
  30   ~ClipboardStandaloneImpl() override;
  31
  32   // mojo::Clipboard implementation.
  33   void GetSequenceNumber(
  34       mojo::Clipboard::Type clipboard_type,
  35       const mojo::Callback<void(uint64_t)>& callback) override;
  36   void GetAvailableMimeTypes(
  37       mojo::Clipboard::Type clipboard_types,
  38       const mojo::Callback<void(mojo::Array<mojo::String>)>& callback) override;
  39   void ReadMimeType(
  40       mojo::Clipboard::Type clipboard_type,
  41       const mojo::String& mime_type,
  42       const mojo::Callback<void(mojo::Array<uint8_t>)>& callback) override;
  43   void WriteClipboardData(
  44       mojo::Clipboard::Type clipboard_type,
  45       mojo::Map<mojo::String, mojo::Array<uint8_t>> data) override;
  46
  47  private:
  48   uint64_t sequence_number_[kNumClipboards];
  49
  50   // Internal struct which stores the current state of the clipboard.
  51   class ClipboardData;
  52
  53   // The current clipboard state. This is what is read from.
  54   scoped_ptr<ClipboardData> clipboard_state_[kNumClipboards];
  55   mojo::StrongBinding<mojo::Clipboard> binding_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(ClipboardStandaloneImpl);
  58 };
  59
  60 }  // namespace clipboard
  61
  62 #endif  // COMPONENTS_CLIPBOARD_CLIPBOARD_STANDALONE_IMPL_H_