linux_aura: Implement dropping in chrome.

ui/base/dragdrop/os_exchange_data_provider_aurax11.cc

+// Copyright (c) 2012 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/base/dragdrop/os_exchange_data_provider_aurax11.h"
+
+#include "base/logging.h"
+#include "base/message_pump_aurax11.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "net/base/net_util.h"
+#include "ui/base/clipboard/clipboard.h"
+#include "ui/base/clipboard/scoped_clipboard_writer.h"
+#include "ui/base/dragdrop/desktop_selection_provider_aurax11.h"
+#include "ui/base/x/selection_utils.h"
+#include "ui/base/x/x11_util.h"
+
+// Note: the GetBlah() methods are used immediately by the
+// web_contents_view_aura.cc:PrepareWebDropData(), while the omnibox is a
+// little more discriminating and calls HasBlah() before trying to get the
+// information.
+
+namespace ui {
+
+namespace {
+
+const char kDndSelection[] = "XdndSelection";
+
+const char* kAtomsToCache[] = {
+  kString,
+  kText,
+  kUtf8String,
+  kDndSelection,
+  Clipboard::kMimeTypeURIList,
+  kMimeTypeMozillaURL,
+  NULL
+};
+
+}  // namespace
+
+OSExchangeDataProviderAuraX11::OSExchangeDataProviderAuraX11(
+    ui::DesktopSelectionProviderAuraX11* provider,
+    ::Window x_window,
+    const std::vector< ::Atom> targets)
+    : x_display_(GetXDisplay()),
+      x_root_window_(DefaultRootWindow(x_display_)),
+      own_window_(false),
+      selection_event_provider_(provider),
+      x_window_(x_window),
+      atom_cache_(x_display_, kAtomsToCache),
+      selection_requestor_(x_display_, x_window_,
+                           atom_cache_.GetAtom(kDndSelection)),
+      selection_owner_(x_display_, x_window_,
+                       atom_cache_.GetAtom(kDndSelection)),
+      targets_(targets) {
+  // We don't know all possible MIME types at compile time.
+  atom_cache_.allow_uncached_atoms();
+
+  selection_event_provider_->SetDropHandler(this);
+}
+
+OSExchangeDataProviderAuraX11::OSExchangeDataProviderAuraX11()
+    : x_display_(GetXDisplay()),
+      x_root_window_(DefaultRootWindow(x_display_)),
+      own_window_(true),
+      selection_event_provider_(NULL),
+      x_window_(XCreateWindow(
+          x_display_,
+          x_root_window_,
+          -100, -100, 10, 10,  // x, y, width, height
+          0,                   // border width
+          CopyFromParent,      // depth
+          InputOnly,
+          CopyFromParent,      // visual
+          0,
+          NULL)),
+      atom_cache_(x_display_, kAtomsToCache),
+      selection_requestor_(x_display_, x_window_,
+                           atom_cache_.GetAtom(kDndSelection)),
+      selection_owner_(x_display_, x_window_,
+                       atom_cache_.GetAtom(kDndSelection)) {
+  // We don't know all possible MIME types at compile time.
+  atom_cache_.allow_uncached_atoms();
+
+  XStoreName(x_display_, x_window_, "Chromium Drag & Drop Window");
+
+  base::MessagePumpAuraX11::Current()->AddDispatcherForWindow(this, x_window_);
+}
+
+OSExchangeDataProviderAuraX11::~OSExchangeDataProviderAuraX11() {
+  if (own_window_) {
+    base::MessagePumpAuraX11::Current()->RemoveDispatcherForWindow(x_window_);
+    XDestroyWindow(x_display_, x_window_);
+  } else {
+    selection_event_provider_->SetDropHandler(NULL);
+  }
+}
+
+void OSExchangeDataProviderAuraX11::OnSelectionNotify(
+    const XSelectionEvent& event) {
+  selection_requestor_.OnSelectionNotify(event);
+}
+
+void OSExchangeDataProviderAuraX11::SetString(const string16& data) {
+  NOTIMPLEMENTED();
+}
+
+void OSExchangeDataProviderAuraX11::SetURL(const GURL& url,
+                                           const string16& title) {
+  NOTIMPLEMENTED();
+}
+
+void OSExchangeDataProviderAuraX11::SetFilename(const base::FilePath& path) {
+  NOTIMPLEMENTED();
+}
+
+void OSExchangeDataProviderAuraX11::SetFilenames(
+    const std::vector<OSExchangeData::FileInfo>& filenames) {
+  NOTIMPLEMENTED();
+}
+
+void OSExchangeDataProviderAuraX11::SetPickledData(
+    OSExchangeData::CustomFormat format,
+    const Pickle& data) {
+  NOTIMPLEMENTED();
+}
+
+bool OSExchangeDataProviderAuraX11::GetString(string16* result) const {
+  std::vector< ::Atom> text_atoms = ui::GetTextAtomsFrom(&atom_cache_);
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(text_atoms, targets_, &requested_types);
+
+  scoped_ptr<ui::SelectionData> data(
+      selection_requestor_.RequestAndWaitForTypes(requested_types));
+  if (data) {
+    std::string text = data->GetText();
+    *result = UTF8ToUTF16(text);
+    return true;
+  }
+
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::GetURLAndTitle(GURL* url,
+                                                   string16* title) const {
+  std::vector< ::Atom> url_atoms = ui::GetURLAtomsFrom(&atom_cache_);
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(url_atoms, targets_, &requested_types);
+
+  scoped_ptr<ui::SelectionData> data(
+      selection_requestor_.RequestAndWaitForTypes(requested_types));
+  if (data) {
+    // TODO(erg): Technically, both of these forms can accept multiple URLs,
+    // but that doesn't match the assumptions of the rest of the system which
+    // expect single types.
+
+    if (data->type() == atom_cache_.GetAtom(kMimeTypeMozillaURL)) {
+      // Mozilla URLs are (UTF16: URL, newline, title).
+      string16 unparsed;
+      data->AssignTo(&unparsed);
+
+      std::vector<string16> tokens;
+      size_t num_tokens = Tokenize(unparsed, ASCIIToUTF16("\n"), &tokens);
+      if (num_tokens >= 2) {
+        *url = GURL(tokens[0]);
+        *title = tokens[1];
+        return true;
+      } else {
+        NOTREACHED() << "Data that claimed to be a Mozilla URL has "
+                     << num_tokens << " tokens instead of 2.";
+      }
+    } else if (data->type() == atom_cache_.GetAtom(
+                   Clipboard::kMimeTypeURIList)) {
+      // uri-lists are newline separated file lists in URL encoding.
+      std::string unparsed;
+      data->AssignTo(&unparsed);
+
+      std::vector<std::string> tokens;
+      size_t num_tokens = Tokenize(unparsed, "\n", &tokens);
+      if (!num_tokens) {
+        NOTREACHED() << "Empty URI list";
+        return false;
+      }
+
+      *url = GURL(tokens[0]);
+      *title = string16();
+
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::GetFilename(base::FilePath* path) const {
+  // On X11, files are passed by URL and aren't separate.
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::GetFilenames(
+    std::vector<OSExchangeData::FileInfo>* filenames) const {
+  // On X11, files are passed by URL and aren't separate.
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::GetPickledData(
+    OSExchangeData::CustomFormat format,
+    Pickle* data) const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::HasString() const {
+  std::vector< ::Atom> text_atoms = ui::GetTextAtomsFrom(&atom_cache_);
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(text_atoms, targets_, &requested_types);
+  return !requested_types.empty();
+}
+
+bool OSExchangeDataProviderAuraX11::HasURL() const {
+  std::vector< ::Atom> url_atoms = ui::GetURLAtomsFrom(&atom_cache_);
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(url_atoms, targets_, &requested_types);
+  return !requested_types.empty();
+}
+
+bool OSExchangeDataProviderAuraX11::HasFile() const {
+  // On X11, files are passed by URL and aren't separate.
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::HasCustomFormat(
+    OSExchangeData::CustomFormat format) const {
+  std::vector< ::Atom> url_atoms;
+  url_atoms.push_back(atom_cache_.GetAtom(format.ToString().c_str()));
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(url_atoms, targets_, &requested_types);
+
+  return !requested_types.empty();
+}
+
+void OSExchangeDataProviderAuraX11::SetHtml(const string16& html,
+                                            const GURL& base_url) {
+  NOTIMPLEMENTED();
+}
+
+bool OSExchangeDataProviderAuraX11::GetHtml(string16* html,
+                                            GURL* base_url) const {
+  std::vector< ::Atom> url_atoms;
+  url_atoms.push_back(atom_cache_.GetAtom(Clipboard::kMimeTypeHTML));
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(url_atoms, targets_, &requested_types);
+
+  scoped_ptr<ui::SelectionData> data(
+      selection_requestor_.RequestAndWaitForTypes(requested_types));
+  if (data) {
+    *html = data->GetHtml();
+    *base_url = GURL();
+    return true;
+  }
+
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::HasHtml() const {
+  std::vector< ::Atom> url_atoms;
+  url_atoms.push_back(atom_cache_.GetAtom(Clipboard::kMimeTypeHTML));
+  std::vector< ::Atom> requested_types;
+  ui::GetAtomIntersection(url_atoms, targets_, &requested_types);
+
+  return !requested_types.empty();
+}
+
+void OSExchangeDataProviderAuraX11::SetDragImage(
+    const gfx::ImageSkia& image,
+    const gfx::Vector2d& cursor_offset) {
+  NOTIMPLEMENTED();
+}
+
+const gfx::ImageSkia& OSExchangeDataProviderAuraX11::GetDragImage() const {
+  NOTIMPLEMENTED();
+  return drag_image_;
+}
+
+const gfx::Vector2d& OSExchangeDataProviderAuraX11::GetDragImageOffset() const {
+  NOTIMPLEMENTED();
+  return drag_image_offset_;
+}
+
+bool OSExchangeDataProviderAuraX11::Dispatch(const base::NativeEvent& event) {
+  // TODO(erg): Implement this side when we implement sending data.
+  return false;
+}
+
+bool OSExchangeDataProviderAuraX11::GetPlainTextURL(GURL* url) const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// OSExchangeData, public:
+
+// static
+OSExchangeData::Provider* OSExchangeData::CreateProvider() {
+  return new OSExchangeDataProviderAuraX11();
+}
+
+// static
+OSExchangeData::CustomFormat
+OSExchangeData::RegisterCustomFormat(const std::string& type) {
+  // On AuraX11 you probably want to just use the Clipboard::Get*FormatType APIs
+  // instead.  But we can also dynamically generate new CustomFormat objects
+  // here too if really necessary.
+  return Clipboard::FormatType::Deserialize(type);
+}
+
+}  // namespace ui