mus: Implement OSExchangeDataProviderMus.

ui/views/mus/os_exchange_data_provider_mus.cc

 // 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.
 
 #include "ui/views/mus/os_exchange_data_provider_mus.h"
 
+#include "base/stl_util.h"
+#include "base/strings/string_split.h"
+#include "base/strings/utf_string_conversions.h"
+#include "mojo/common/common_type_converters.h"
+#include "net/base/filename_util.h"
+#include "services/ui/public/interfaces/clipboard.mojom.h"
+#include "ui/base/dragdrop/file_info.h"
+#include "url/gurl.h"
+
 namespace views {
 
+namespace {
+
+std::vector<uint8_t> FromString(const std::string& str) {
+  return std::vector<uint8_t>(str.begin(), str.end());
+}
+
+std::string ToString(const std::vector<uint8_t>& v) {
+  return std::string(v.begin(), v.end());
+}
+
+base::string16 ToString16(const std::vector<uint8_t>& v) {
+  return base::string16(

[sky, 2016/08/15 20:31:26]

This seems rather risky. Wouldn't it be better to map string16 to utf8?

[Elliot Glaysher, 2016/08/15 21:53:13]

As mentioned in person, we do this in the linux port.

+      reinterpret_cast<const base::char16*>(v.data()),
+      v.size() / 2);
+}
+
+std::vector<base::StringPiece> ParseURIList(const std::vector<uint8_t>& data) {
+  return base::SplitStringPiece(
+      base::StringPiece(
+          reinterpret_cast<const char*>(&data.front()), data.size()),
+      "\n",
+      base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
+}
+
+void AddString16ToVector(const base::string16& str,
+                         std::vector<uint8_t>* bytes) {
+  const unsigned char* front =
+      reinterpret_cast<const uint8_t*>(str.data());
+  bytes->insert(bytes->end(), front, front + (str.size() * 2));
+}
+
+}  // namespace
+
 OSExchangeDataProviderMus::OSExchangeDataProviderMus() {}
 
 OSExchangeDataProviderMus::~OSExchangeDataProviderMus() {}
 
+OSExchangeDataProviderMus::Data OSExchangeDataProviderMus::GetData() const {
+  return mime_data_;
+}
+
 std::unique_ptr<ui::OSExchangeData::Provider>
 OSExchangeDataProviderMus::Clone() const {
-  return std::unique_ptr<ui::OSExchangeData::Provider>();
+  std::unique_ptr<OSExchangeDataProviderMus> r =
+      base::MakeUnique<OSExchangeDataProviderMus>();
+  r->drag_image_ = drag_image_;
+  r->drag_image_offset_ = drag_image_offset_;
+  r->mime_data_ = mime_data_;
+  return base::WrapUnique<ui::OSExchangeData::Provider>(r.release());
 }
 
 void OSExchangeDataProviderMus::MarkOriginatedFromRenderer() {
+  // Currently unimplemented because ChromeOS doesn't need this.
+  //
+  // TODO(erg): Implement this when we start porting mus to other platforms.
 }
 
 bool OSExchangeDataProviderMus::DidOriginateFromRenderer() const {
   return false;
 }
 
 void OSExchangeDataProviderMus::SetString(const base::string16& data) {
+  if (HasString())
+    return;
+
+  mime_data_[ui::mojom::kMimeTypeText] = FromString(base::UTF16ToUTF8(data));
 }
 
 void OSExchangeDataProviderMus::SetURL(const GURL& url,
                                        const base::string16& title) {
+  base::string16 spec = base::UTF8ToUTF16(url.spec());
+  std::vector<unsigned char> data;
+  AddString16ToVector(spec, &data);
+  AddString16ToVector(base::ASCIIToUTF16("\n"), &data);
+  AddString16ToVector(title, &data);
+  mime_data_[ui::mojom::kMimeTypeMozillaURL] = std::move(data);
+
+  if (!base::ContainsKey(mime_data_, ui::mojom::kMimeTypeText))
+    mime_data_[ui::mojom::kMimeTypeText] = FromString(url.spec());
 }
 
 void OSExchangeDataProviderMus::SetFilename(const base::FilePath& path) {
+  std::vector<ui::FileInfo> data;
+  data.push_back(ui::FileInfo(path, base::FilePath()));
+  SetFilenames(data);
 }
 
 void OSExchangeDataProviderMus::SetFilenames(
     const std::vector<ui::FileInfo>& file_names) {
+  std::vector<std::string> paths;
+  for (std::vector<ui::FileInfo>::const_iterator it = file_names.begin();
+       it != file_names.end();
+       ++it) {
+    std::string url_spec = net::FilePathToFileURL(it->path).spec();
+    if (!url_spec.empty())
+      paths.push_back(url_spec);
+  }
+
+  std::string joined_data = base::JoinString(paths, "\n");
+  mime_data_[ui::mojom::kMimeTypeURIList] = FromString(joined_data);
 }
 
 void OSExchangeDataProviderMus::SetPickledData(
     const ui::Clipboard::FormatType& format,
-    const base::Pickle& data) {
+    const base::Pickle& pickle) {
+  const unsigned char* bytes =
+      reinterpret_cast<const unsigned char*>(pickle.data());
+
+  mime_data_[format.Serialize()] = mojo::Array<uint8_t>(
+      std::vector<uint8_t>(bytes, bytes + pickle.size()));
 }
 
 bool OSExchangeDataProviderMus::GetString(base::string16* data) const {
-  return false;
+  auto it = mime_data_.find(ui::mojom::kMimeTypeText);
+  if (it != mime_data_.end())
+    *data = base::UTF8ToUTF16(ToString(it->second));
+  return it != mime_data_.end();
 }
 
 bool OSExchangeDataProviderMus::GetURLAndTitle(
     ui::OSExchangeData::FilenameToURLPolicy policy,
     GURL* url,
     base::string16* title) const {
-  return false;
+  auto it = mime_data_.find(ui::mojom::kMimeTypeMozillaURL);
+  if (it == mime_data_.end()) {
+    title->clear();
+    return GetPlainTextURL(url) ||
+           (policy == ui::OSExchangeData::CONVERT_FILENAMES && GetFileURL(url));
+  }
+
+  base::string16 data = ToString16(it->second);
+  base::string16::size_type newline = data.find('\n');
+  if (newline == std::string::npos)
+    return false;
+
+  GURL unparsed_url(data.substr(0, newline));
+  if (!unparsed_url.is_valid())
+    return false;
+
+  *url = unparsed_url;
+  *title = data.substr(newline + 1);
+  return true;
 }
 
 bool OSExchangeDataProviderMus::GetFilename(base::FilePath* path) const {
+  std::vector<ui::FileInfo> filenames;
+  if (GetFilenames(&filenames)) {
+    *path = filenames.front().path;
+    return true;
+  }
+
   return false;
 }
 
 bool OSExchangeDataProviderMus::GetFilenames(
     std::vector<ui::FileInfo>* file_names) const {
-  return false;
+  auto it = mime_data_.find(ui::mojom::kMimeTypeURIList);
+  if (it == mime_data_.end())
+    return false;
+
+  file_names->clear();
+  for (const base::StringPiece& piece : ParseURIList(it->second)) {
+    GURL url(piece);
+    base::FilePath file_path;
+    if (url.SchemeIsFile() && net::FileURLToFilePath(url, &file_path))
+      file_names->push_back(ui::FileInfo(file_path, base::FilePath()));
+  }
+
+  return true;
 }
 
 bool OSExchangeDataProviderMus::GetPickledData(
     const ui::Clipboard::FormatType& format,
     base::Pickle* data) const {
-  return false;
+  auto it = mime_data_.find(format.Serialize());
+  if (it == mime_data_.end())
+    return false;
+
+  // Note that the pickle object on the right hand side of the assignment
+  // only refers to the bytes in |data|. The assignment copies the data.
+  *data = base::Pickle(reinterpret_cast<const char*>(it->second.data()),
+                       static_cast<int>(it->second.size()));
+  return true;
 }
 
 bool OSExchangeDataProviderMus::HasString() const {
-  return false;
+  return base::ContainsKey(mime_data_, ui::mojom::kMimeTypeText);
 }
 
 bool OSExchangeDataProviderMus::HasURL(
     ui::OSExchangeData::FilenameToURLPolicy policy) const {
+  if (base::ContainsKey(mime_data_, ui::mojom::kMimeTypeMozillaURL))
+    return true;
+
+  auto it = mime_data_.find(ui::mojom::kMimeTypeURIList);
+  if (it == mime_data_.end())
+    return false;
+
+  for (const base::StringPiece& piece : ParseURIList(it->second)) {
+    if (!GURL(piece).SchemeIsFile() ||
+        policy == ui::OSExchangeData::CONVERT_FILENAMES) {
+      return true;
+    }
+  }
+
   return false;
 }
 
 bool OSExchangeDataProviderMus::HasFile() const {
+  auto it = mime_data_.find(ui::mojom::kMimeTypeURIList);
+  if (it == mime_data_.end())
+    return false;
+
+  for (const base::StringPiece& piece : ParseURIList(it->second)) {
+    GURL url(piece);
+    base::FilePath file_path;
+    if (url.SchemeIsFile() && net::FileURLToFilePath(url, &file_path))
+      return true;
+  }
+
   return false;
 }
 
 bool OSExchangeDataProviderMus::HasCustomFormat(
     const ui::Clipboard::FormatType& format) const {
-  return false;
+  return base::ContainsKey(mime_data_, format.Serialize());
 }
 
 // These methods were added in an ad-hoc way to different operating
 // systems. We need to support them until they get cleaned up.
 #if (!defined(OS_CHROMEOS) && defined(USE_X11)) || defined(OS_WIN)
 void OSExchangeDataProviderMus::SetFileContents(
     const base::FilePath& filename,
     const std::string& file_contents) {
 
 }
@@ skipping 11 matching lines @@
 }
 
 void OSExchangeDataProviderMus::SetDownloadFileInfo(
     const ui::OSExchangeData::DownloadFileInfo& download) {
 }
 #endif
 
 #if defined(USE_AURA)
 void OSExchangeDataProviderMus::SetHtml(const base::string16& html,
                                         const GURL& base_url) {
-
+  std::vector<unsigned char> bytes;
+  // Manually jam a UTF16 BOM into bytes because otherwise, other programs will
+  // assume UTF-8.
+  bytes.push_back(0xFF);
+  bytes.push_back(0xFE);
+  AddString16ToVector(html, &bytes);
+  mime_data_[ui::mojom::kMimeTypeHTML] = bytes;
 }
 
 bool OSExchangeDataProviderMus::GetHtml(base::string16* html,
                                         GURL* base_url) const {
-  return false;
+  auto it = mime_data_.find(ui::mojom::kMimeTypeHTML);
+  if (it == mime_data_.end())
+    return false;
+
+  const unsigned char* data = it->second.data();
+  size_t size = it->second.size();
+  base::string16 markup;
+
+  // If the data starts with 0xFEFF, i.e., Byte Order Mark, assume it is
+  // UTF-16, otherwise assume UTF-8.
+  if (size >= 2 &&
+      reinterpret_cast<const uint16_t*>(data)[0] == 0xFEFF) {
+    markup.assign(reinterpret_cast<const base::char16*>(data) + 1,
+                  (size / 2) - 1);
+  } else {
+    base::UTF8ToUTF16(reinterpret_cast<const char*>(data), size, &markup);
+  }
+
+  // If there is a terminating NULL, drop it.
+  if (!markup.empty() && markup.at(markup.length() - 1) == '\0')
+    markup.resize(markup.length() - 1);
+
+  *html = markup;
+  *base_url = GURL();
+  return true;
 }
 
 bool OSExchangeDataProviderMus::HasHtml() const {
-  return false;
+  return base::ContainsKey(mime_data_, ui::mojom::kMimeTypeHTML);
 }
 #endif
 
 #if defined(USE_AURA) || defined(OS_MACOSX)
 void OSExchangeDataProviderMus::SetDragImage(
     const gfx::ImageSkia& image,
     const gfx::Vector2d& cursor_offset) {
   drag_image_ = image;
   drag_image_offset_ = cursor_offset;
 }
 
 const gfx::ImageSkia& OSExchangeDataProviderMus::GetDragImage() const {
   return drag_image_;
 }
 
 const gfx::Vector2d& OSExchangeDataProviderMus::GetDragImageOffset() const {
   return drag_image_offset_;
 }
 #endif
 
+bool OSExchangeDataProviderMus::GetFileURL(GURL* url) const {
+  base::FilePath file_path;
+  if (!GetFilename(&file_path))
+    return false;
+
+  GURL test_url = net::FilePathToFileURL(file_path);
+  if (!test_url.is_valid())
+    return false;
+
+  if (url)
+    *url = test_url;
+  return true;
+}
+
+bool OSExchangeDataProviderMus::GetPlainTextURL(GURL* url) const {
+  base::string16 str;
+  if (!GetString(&str))
+    return false;
+
+  GURL test_url(str);
+  if (!test_url.is_valid())
+    return false;
+
+  if (url)
+    *url = test_url;
+  return true;
+}
+
 }  // namespace views