Implement ui::ClipboardMus.

ui/views/mus/clipboard_mus.h

Index: ui/views/mus/clipboard_mus.h
diff --git a/ui/views/mus/clipboard_mus.h b/ui/views/mus/clipboard_mus.h
new file mode 100644
index 0000000000000000000000000000000000000000..b215832adfa9fe5d0b618f0d747a43b991770765
--- /dev/null
+++ b/ui/views/mus/clipboard_mus.h
@@ -0,0 +1,82 @@
+// Copyright 2016 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 UI_VIEWS_MUS_CLIPBOARD_MUS_H_
+#define UI_VIEWS_MUS_CLIPBOARD_MUS_H_
+
+#include "components/mus/public/interfaces/clipboard.mojom.h"
+#include "ui/base/clipboard/clipboard.h"
+#include "ui/views/mus/mus_export.h"
+
+namespace shell {
+class Connector;
+}
+
+namespace views {
+
+// An adaptor class which translates the ui::Clipboard interface to the
+// clipboard provided by mus.
+class VIEWS_MUS_EXPORT ClipboardMus : public ui::Clipboard {
+ public:
+  ClipboardMus();
+  ~ClipboardMus() override;
+
+  void Init(shell::Connector* connector);
+
+ private:
+  mojo::String GetMimeTypeFor(const FormatType& format) const;
+
+  bool HasMimeType(const mojo::Array<mojo::String>& available_types,
+                   const std::string& type) const;
+
+  // Clipboard overrides:
+  uint64_t GetSequenceNumber(ui::ClipboardType type) const override;
+  bool IsFormatAvailable(const FormatType& format,
+                         ui::ClipboardType type) const override;
+  void Clear(ui::ClipboardType type) override;
+  void ReadAvailableTypes(ui::ClipboardType type,
+                          std::vector<base::string16>* types,
+                          bool* contains_filenames) const override;
+  void ReadText(ui::ClipboardType type, base::string16* result) const override;
+  void ReadAsciiText(ui::ClipboardType type,
+                     std::string* result) const override;
+  void ReadHTML(ui::ClipboardType type,
+                base::string16* markup,
+                std::string* src_url,
+                uint32_t* fragment_start,
+                uint32_t* fragment_end) const override;
+  void ReadRTF(ui::ClipboardType type, std::string* result) const override;
+  SkBitmap ReadImage(ui::ClipboardType type) const override;
+  void ReadCustomData(ui::ClipboardType clipboard_type,
+                      const base::string16& type,
+                      base::string16* result) const override;
+  void ReadBookmark(base::string16* title, std::string* url) const override;
+  void ReadData(const FormatType& format, std::string* result) const override;
+  void WriteObjects(ui::ClipboardType type, const ObjectMap& objects) override;
+  void WriteText(const char* text_data, size_t text_len) override;
+  void WriteHTML(const char* markup_data,
+                 size_t markup_len,
+                 const char* url_data,
+                 size_t url_len) override;
+  void WriteRTF(const char* rtf_data, size_t data_len) override;
+  void WriteBookmark(const char* title_data,
+                     size_t title_len,
+                     const char* url_data,
+                     size_t url_len) override;
+  void WriteWebSmartPaste() override;
+  void WriteBitmap(const SkBitmap& bitmap) override;
+  void WriteData(const FormatType& format,
+                 const char* data_data,
+                 size_t data_len) override;
+
+  mus::mojom::ClipboardPtr clipboard_;
+
+  mojo::Map<mojo::String, mojo::Array<uint8_t>> current_clipboard_;

[sky, 2016/05/26 23:10:27]

I'm confused about when you use this and when you don't. For example, ReadHTML
calls to clipboard_ but WriteHtml writes to current_clipboard_.

[Elliot Glaysher, 2016/05/31 17:01:40]

Elaborated about this temporary buffer.

+
+  DISALLOW_COPY_AND_ASSIGN(ClipboardMus);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_MUS_CLIPBOARD_MUS_H_