mojo: Create a basic clipboard.

mojo/services/html_viewer/webclipboard_impl.cc

+// Copyright 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/html_viewer/webclipboard_impl.h"
+
+#include "base/bind.h"
+
+namespace mojo {
+namespace {
+
+void CopyUint64(uint64_t* output, uint64_t input) {
+  *output = input;
+}
+
+void CopyString(std::string* output, const mojo::String& input) {
+  *output = input.To<std::string>();
+}
+
+void CopyVectorString(std::vector<std::string>* output,
+                      const Array<String>& input) {
+  *output = input.To<std::vector<std::string> >();
+}
+
+// Work around having an odd arrity in base/bind.h.pump.
+struct HTMLOutput {
+  std::string* text_output;
+  blink::WebURL* url_output;
+  unsigned* start_output;
+  unsigned* end_output;
+};
+void CopyHTMLReturnValues(HTMLOutput* output,
+                          const mojo::String& text_input,
+                          const mojo::String& url_input,
+                          uint32_t start_input,
+                          uint32_t end_input) {
+  *output->text_output = text_input.To<std::string>();
+  *output->url_output = GURL(url_input.To<std::string>());
+  *output->start_output = start_input;
+  *output->end_output = end_input;
+}
+
+template <typename T, typename U>
+bool Contains(const std::vector<T>& v, const U& item) {
+  return std::find(v.begin(), v.end(), item) != v.end();
+}
+
+const char kMimeTypeWebkitSmartPaste[] = "chromium/x-webkit-paste";
+
+}  // namespace
+
+WebClipboardImpl::WebClipboardImpl(ClipboardPtr clipboard)
+    : clipboard_(clipboard.Pass()) {
+}
+
+WebClipboardImpl::~WebClipboardImpl() {
+}
+
+uint64_t WebClipboardImpl::sequenceNumber(Buffer buffer) {
+  mojo::Clipboard::Type clipboard_type = ConvertBufferType(buffer);
+
+  uint64_t number = 0;
+  clipboard_->GetSequenceNumber(clipboard_type,
+                                base::Bind(&CopyUint64, &number));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+  return number;
+}
+
+bool WebClipboardImpl::isFormatAvailable(Format format, Buffer buffer) {
+  mojo::Clipboard::Type clipboard_type = ConvertBufferType(buffer);
+
+  std::vector<std::string> types;
+  clipboard_->GetAvailableFormatMimeTypes(
+      clipboard_type, base::Bind(&CopyVectorString, &types));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+
+  switch (format) {
+    case FormatPlainText:
+      return Contains(types, mojo::Clipboard::MIME_TYPE_TEXT);
+    case FormatHTML:
+      return Contains(types, mojo::Clipboard::MIME_TYPE_HTML);
+    case FormatSmartPaste:
+      return Contains(types, kMimeTypeWebkitSmartPaste);
+    case FormatBookmark:
+      // This might be difficult.
+      return false;
+  }
+
+  return false;
+}
+
+blink::WebVector<blink::WebString> WebClipboardImpl::readAvailableTypes(
+    Buffer buffer,
+    bool* containsFilenames) {
+  mojo::Clipboard::Type clipboard_type = ConvertBufferType(buffer);
+
+  std::vector<std::string> types;
+  clipboard_->GetAvailableFormatMimeTypes(
+      clipboard_type, base::Bind(&CopyVectorString, &types));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+
+  // AFAICT, every instance of setting containsFilenames is false.
+  *containsFilenames = false;
+
+  blink::WebVector<blink::WebString> output(types.size());
+  for (size_t i = 0; i < types.size(); ++i) {
+    output[i] = blink::WebString::fromUTF8(types[i]);
+  }
+
+  return output;
+}
+
+blink::WebString WebClipboardImpl::readPlainText(Buffer buffer) {
+  mojo::Clipboard::Type type = ConvertBufferType(buffer);
+
+  std::string text;
+  clipboard_->ReadPlainText(type, base::Bind(&CopyString, &text));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+
+  return blink::WebString::fromUTF8(text);
+}
+
+blink::WebString WebClipboardImpl::readHTML(Buffer buffer,
+                                            blink::WebURL* pageURL,
+                                            unsigned* fragmentStart,
+                                            unsigned* fragmentEnd) {
+  mojo::Clipboard::Type type = ConvertBufferType(buffer);
+
+  std::string text;
+  struct HTMLOutput output = {&text, pageURL, fragmentStart, fragmentEnd};
+  clipboard_->ReadHTML(type, base::Bind(&CopyHTMLReturnValues, &output));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+
+  return blink::WebString::fromUTF8(text);
+}
+
+blink::WebString WebClipboardImpl::readCustomData(
+    Buffer buffer,
+    const blink::WebString& mime_type) {
+  mojo::Clipboard::Type clipboard_type = ConvertBufferType(buffer);
+
+  std::string data;
+  clipboard_->ReadMIMEType(
+      clipboard_type, mime_type.utf8(), base::Bind(&CopyString, &data));
+
+  // Force this to be synchronous.
+  clipboard_.WaitForIncomingMethodCall();
+
+  return blink::WebString::fromUTF8(data);
+}
+
+void WebClipboardImpl::writePlainText(const blink::WebString& text) {
+  // TODO(erg): What about the target buffer here!?
+  clipboard_->QueueWritePlainText(mojo::Clipboard::TYPE_COPY_PASTE,
+                                  text.utf8());
+
+  clipboard_->WriteQueuedData(mojo::Clipboard::TYPE_COPY_PASTE);
+}
+
+void WebClipboardImpl::writeHTML(const blink::WebString& htmlText,
+                                 const blink::WebURL& url,
+                                 const blink::WebString& plainText,
+                                 bool writeSmartPaste) {
+  clipboard_->QueueWriteHTML(
+      mojo::Clipboard::TYPE_COPY_PASTE, htmlText.utf8(), url.string().utf8());
+  clipboard_->QueueWritePlainText(mojo::Clipboard::TYPE_COPY_PASTE,
+                                  plainText.utf8());
+
+  if (writeSmartPaste) {
+    clipboard_->QueueWriteMIMEType(mojo::Clipboard::TYPE_COPY_PASTE,
+                                   kMimeTypeWebkitSmartPaste,
+                                   std::string());
+  }
+
+  clipboard_->WriteQueuedData(mojo::Clipboard::TYPE_COPY_PASTE);
+}
+
+mojo::Clipboard::Type WebClipboardImpl::ConvertBufferType(Buffer buffer) {
+  switch (buffer) {
+    case BufferStandard:
+      return mojo::Clipboard::TYPE_COPY_PASTE;
+    case BufferSelection:
+      return mojo::Clipboard::TYPE_SELECTION;
+  }
+
+  NOTREACHED();
+  return mojo::Clipboard::TYPE_COPY_PASTE;
+}
+
+}  // namespace mojo