mojo: Create a basic clipboard.

mojo/services/clipboard/clipboard_standalone_impl.cc

+// Copyright (c) 2014 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.
+
+#include "mojo/services/clipboard/clipboard_standalone_impl.h"
+
+namespace mojo {
+
+// ClipboardData contains data copied to the Clipboard for a variety of formats.
+// It mostly just provides APIs to cleanly access and manipulate this data.
+class ClipboardStandaloneImpl::ClipboardData {
+ public:
+  ClipboardData() {}
+  virtual ~ClipboardData() {}
+
+  std::vector<std::string> GetMimeTypes() const {
+    std::vector<std::string> types;
+    for (std::map<std::string, std::string>::const_iterator it =
+             data_types_.begin();
+         it != data_types_.end();
+         ++it) {
+      types.push_back(it->first);
+    }
+
+    return types;
+  }
+
+  void SetData(const std::string& mime_type, const std::string& data) {
+    data_types_[mime_type] = data;
+  }
+
+  bool GetData(const std::string& mime_type, std::string* data) const {
+    std::map<std::string, std::string>::const_iterator it =
+        data_types_.find(mime_type);
+    if (it != data_types_.end()) {
+      *data = it->second;
+      return true;
+    }
+
+    return false;
+  }
+
+  // Extended data for mime type "text/html".
+  const std::string& html_url() const { return html_url_; }
+  void set_html_url(const std::string& url) { html_url_ = url; }
+
+  // TODO(erg): We also need to handle images.
+
+ private:
+  // Storage for all normal, one byte-string datatypes. Some datatypes also
+  // specify an additional piece of data, which live below.
+  std::map<std::string, std::string> data_types_;
+
+  // The URL parameter on an HTML in UTF8 format.
+  std::string html_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClipboardData);
+};
+
+ClipboardStandaloneImpl::ClipboardStandaloneImpl() {
+  for (int i = 0; i < kNumClipboards; ++i) {
+    sequence_number_[i] = 0;
+    clipboard_state_[i].reset(new ClipboardData);
+    queued_data_[i].reset(new ClipboardData);
+  }
+}
+
+ClipboardStandaloneImpl::~ClipboardStandaloneImpl() {
+}
+
+void ClipboardStandaloneImpl::GetSequenceNumber(
+    Clipboard::Type clipboard_type,
+    const mojo::Callback<void(uint64_t)>& callback) {
+  callback.Run(sequence_number_[clipboard_type]);
+}
+
+void ClipboardStandaloneImpl::GetAvailableFormatMimeTypes(
+    Clipboard::Type clipboard_type,
+    const mojo::Callback<void(mojo::Array<mojo::String>)>& callback) {
+  mojo::Array<mojo::String> types = mojo::Array<mojo::String>::From(
+      clipboard_state_[clipboard_type]->GetMimeTypes());
+  callback.Run(types.Pass());
+}
+
+void ClipboardStandaloneImpl::ReadPlainText(
+    Clipboard::Type clipboard_type,
+    const mojo::Callback<void(mojo::String)>& callback) {
+  std::string text;
+  clipboard_state_[clipboard_type]->GetData(mojo::Clipboard::MIME_TYPE_TEXT,
+                                            &text);
+  callback.Run(text);
+}
+
+void ClipboardStandaloneImpl::ReadHTML(
+    Clipboard::Type clipboard_type,
+    const mojo::Callback<void(mojo::String, mojo::String, uint32_t, uint32_t)>&
+        callback) {
+  std::string html_text;
+  if (clipboard_state_[clipboard_type]->GetData(mojo::Clipboard::MIME_TYPE_HTML,
+                                                &html_text)) {
+    // Note: the fragment positioning is apparently relevant on Windows, because
+    // the system passes additional context back to us. It's not relevant here,
+    // but still needs to be part of the interface.
+    uint32_t html_end = static_cast<uint32_t>(html_text.size());
+    callback.Run(
+        html_text, clipboard_state_[clipboard_type]->html_url(), 0, html_end);
+    return;
+  }
+
+  // Send back an empty.
+  callback.Run(std::string(), std::string(), 0, 0);
+}
+
+void ClipboardStandaloneImpl::ReadMIMEType(
+    Clipboard::Type clipboard_type,
+    const mojo::String& mime_type,
+    const mojo::Callback<void(mojo::String)>& callback) {
+  std::string mime_data;
+  clipboard_state_[clipboard_type]->GetData(mime_type.To<std::string>(),
+                                            &mime_data);
+  callback.Run(mime_data);
+}
+
+void ClipboardStandaloneImpl::QueueWritePlainText(
+    Clipboard::Type clipboard_type,
+    const mojo::String& text) {
+  queued_data_[clipboard_type]->SetData(mojo::Clipboard::MIME_TYPE_TEXT,
+                                        text.To<std::string>());
+}
+
+void ClipboardStandaloneImpl::QueueWriteHTML(Clipboard::Type clipboard_type,
+                                             const mojo::String& html_text,
+                                             const mojo::String& url) {
+  queued_data_[clipboard_type]->SetData(mojo::Clipboard::MIME_TYPE_HTML,
+                                        html_text.To<std::string>());
+  queued_data_[clipboard_type]->set_html_url(url.To<std::string>());
+}
+
+void ClipboardStandaloneImpl::QueueWriteMIMEType(Clipboard::Type clipboard_type,
+                                                 const mojo::String& mime_type,
+                                                 const mojo::String& data) {
+  queued_data_[clipboard_type]->SetData(mime_type.To<std::string>(),
+                                        data.To<std::string>());
+}
+
+void ClipboardStandaloneImpl::WriteQueuedData(Clipboard::Type clipboard_type) {
+  sequence_number_[clipboard_type]++;
+  clipboard_state_[clipboard_type] = queued_data_[clipboard_type].Pass();
+  queued_data_[clipboard_type].reset(new ClipboardData);
+}
+
+}  // namespace mojo