Revert "views: Move widget/ directory to ui/views." properly.

views/widget/drop_target_gtk.cc

+// Copyright (c) 2011 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 "views/widget/drop_target_gtk.h"
+
+#include <algorithm>
+#include <iterator>
+#include <string>
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/utf_string_conversions.h"
+#include "net/base/net_util.h"
+#include "ui/base/dragdrop/drag_drop_types.h"
+#include "ui/base/dragdrop/gtk_dnd_util.h"
+#include "ui/base/dragdrop/os_exchange_data_provider_gtk.h"
+#include "ui/gfx/point.h"
+#include "views/widget/root_view.h"
+#include "views/widget/native_widget_gtk.h"
+
+using ui::OSExchangeData;
+
+namespace {
+
+std::string GdkAtomToString(GdkAtom atom) {
+  gchar* c_name = gdk_atom_name(atom);
+  std::string name(c_name);
+  g_free(c_name);
+  return name;
+}
+
+// Returns true if |name| is a known name of plain text.
+bool IsTextType(const std::string& name) {
+  return name == "text/plain" || name == "TEXT" ||
+         name == "STRING" || name == "UTF8_STRING" ||
+         name == "text/plain;charset=utf-8";
+}
+
+// Returns the OSExchangeData::Formats in |targets| and all the
+// OSExchangeData::CustomFormats in |type_set|.
+int CalculateTypes(GList* targets, std::set<GdkAtom>* type_set) {
+  int types = 0;
+  for (GList* element = targets; element;
+       element = g_list_next(element)) {
+    GdkAtom atom = static_cast<GdkAtom>(element->data);
+    type_set->insert(atom);
+    if (atom == GDK_TARGET_STRING) {
+      types |= OSExchangeData::STRING;
+    } else if (atom == ui::GetAtomForTarget(ui::CHROME_NAMED_URL)) {
+      types |= OSExchangeData::URL;
+    } else if (atom == ui::GetAtomForTarget(ui::TEXT_URI_LIST)) {
+      // TEXT_URI_LIST is used for files as well as urls.
+      types |= OSExchangeData::URL | OSExchangeData::FILE_NAME;
+    } else {
+      std::string target_name = GdkAtomToString(atom);
+      if (IsTextType(target_name)) {
+        types |= OSExchangeData::STRING;
+      } else {
+        // Assume any unknown data is pickled.
+        types |= OSExchangeData::PICKLED_DATA;
+      }
+    }
+  }
+  return types;
+}
+
+}  // namespace
+
+namespace views {
+
+DropTargetGtk::DropTargetGtk(internal::RootView* root_view,
+                             GdkDragContext* context)
+    : helper_(root_view),
+      requested_formats_(0),
+      waiting_for_data_(false),
+      received_drop_(false),
+      pending_view_(NULL) {
+  std::set<GdkAtom> all_formats;
+  int source_formats = CalculateTypes(context->targets, &all_formats);
+  data_.reset(new OSExchangeData(new OSExchangeDataProviderGtk(
+                                     source_formats, all_formats)));
+}
+
+DropTargetGtk::~DropTargetGtk() {
+}
+
+void DropTargetGtk::ResetTargetViewIfEquals(View* view) {
+  helper_.ResetTargetViewIfEquals(view);
+}
+
+void DropTargetGtk::OnDragDataReceived(GdkDragContext* context,
+                                       gint x,
+                                       gint y,
+                                       GtkSelectionData* data,
+                                       guint info,
+                                       guint time) {
+  std::string target_name = GdkAtomToString(data->type);
+  if (data->type == GDK_TARGET_STRING || IsTextType(target_name)) {
+    guchar* text_data = gtk_selection_data_get_text(data);
+    string16 result;
+    if (text_data) {
+      char* as_char = reinterpret_cast<char*>(text_data);
+      UTF8ToUTF16(as_char, strlen(as_char), &result);
+      g_free(text_data);
+    }
+    data_provider().SetString(result);
+  } else if (requested_custom_formats_.find(data->type) !=
+             requested_custom_formats_.end()) {
+    Pickle result;
+    if (data->length > 0)
+      result = Pickle(reinterpret_cast<char*>(data->data), data->length);
+    data_provider().SetPickledData(data->type, result);
+  } else if (data->type == ui::GetAtomForTarget(ui::CHROME_NAMED_URL)) {
+    GURL url;
+    string16 title;
+    ui::ExtractNamedURL(data, &url, &title);
+    data_provider().SetURL(url, title);
+  } else if (data->type == ui::GetAtomForTarget(ui::TEXT_URI_LIST)) {
+    std::vector<GURL> urls;
+    ui::ExtractURIList(data, &urls);
+    if (urls.size() == 1 && urls[0].is_valid()) {
+      data_provider().SetURL(urls[0], string16());
+
+      // TEXT_URI_LIST is used for files as well as urls.
+      if (urls[0].SchemeIsFile()) {
+        FilePath file_path;
+        if (net::FileURLToFilePath(urls[0], &file_path))
+          data_provider().SetFilename(file_path);
+      }
+    } else {
+      // Consumers of OSExchangeData will see this as an invalid URL. That is,
+      // when GetURL is invoked on the OSExchangeData this triggers false to
+      // be returned.
+      data_provider().SetURL(GURL(), string16());
+    }
+  }
+
+  if (!data_->HasAllFormats(requested_formats_, requested_custom_formats_))
+    return;  // Waiting on more data.
+
+  int drag_operation = ui::DragDropTypes::GdkDragActionToDragOperation(
+      context->actions);
+  gfx::Point root_view_location(x, y);
+  drag_operation = helper_.OnDragOver(*data_, root_view_location,
+                                      drag_operation);
+  GdkDragAction gdk_action = static_cast<GdkDragAction>(
+      ui::DragDropTypes::DragOperationToGdkDragAction(drag_operation));
+  if (!received_drop_)
+    gdk_drag_status(context, gdk_action, time);
+
+  waiting_for_data_ = false;
+
+  if (pending_view_ && received_drop_) {
+    FinishDrop(context, x, y, time);
+    // WARNING: we've been deleted.
+    return;
+  }
+}
+
+gboolean DropTargetGtk::OnDragDrop(GdkDragContext* context,
+                                   gint x,
+                                   gint y,
+                                   guint time) {
+  received_drop_ = true;
+  OnDragMotion(context, x, y, time);
+  if (!pending_view_) {
+    // User isn't over a view, no drop can occur.
+    static_cast<NativeWidgetGtk*>(
+        helper_.root_view()->GetWidget()->native_widget())->ResetDropTarget();
+    // WARNING: we've been deleted.
+    return FALSE;
+  }
+
+  if (!waiting_for_data_) {
+    // We've got all the data now.
+    FinishDrop(context, x, y, time);
+    // WARNING: we've been deleted.
+    return TRUE;
+  }
+  // We're waiting on data.
+  return TRUE;
+}
+
+void DropTargetGtk::OnDragLeave(GdkDragContext* context, guint time) {
+  helper_.OnDragExit();
+}
+
+gboolean DropTargetGtk::OnDragMotion(GdkDragContext* context,
+                                     gint x,
+                                     gint y,
+                                     guint time) {
+  waiting_for_data_ = false;
+  gfx::Point root_view_location(x, y);
+  pending_view_ =
+      helper_.CalculateTargetView(root_view_location, *data_, false);
+  if (pending_view_ &&
+      (received_drop_ || (pending_view_ != helper_.target_view() &&
+                          pending_view_->AreDropTypesRequired()))) {
+    // The target requires drop types before it can answer CanDrop,
+    // ask for the data now.
+    int formats = 0;
+    std::set<GdkAtom> custom_formats;
+    pending_view_->GetDropFormats(&formats, &custom_formats);
+    IntersectFormats(data_provider().known_formats(),
+                     data_provider().known_custom_formats(),
+                     &formats, &custom_formats);
+    if (!data_provider().HasDataForAllFormats(formats, custom_formats)) {
+      if (!received_drop_)
+        helper_.OnDragExit();
+
+      // The target needs data for all the types before it can test if the
+      // drop is valid, but we don't have all the data. Request the data
+      // now. When we get back the data we'll update the target.
+      RequestFormats(context, formats, custom_formats, time);
+
+      waiting_for_data_ = true;
+
+      return TRUE;
+    }
+  }
+
+  int drag_operation = ui::DragDropTypes::GdkDragActionToDragOperation(
+      context->actions);
+  drag_operation = helper_.OnDragOver(*data_, root_view_location,
+                                      drag_operation);
+  if (!received_drop_) {
+    GdkDragAction gdk_action =
+        static_cast<GdkDragAction>(
+            ui::DragDropTypes::DragOperationToGdkDragAction(drag_operation));
+    gdk_drag_status(context, gdk_action, time);
+  }
+  return TRUE;
+}
+
+void DropTargetGtk::FinishDrop(GdkDragContext* context,
+                               gint x, gint y, guint time) {
+  gfx::Point root_view_location(x, y);
+  int drag_operation = ui::DragDropTypes::GdkDragActionToDragOperation(
+      context->actions);
+  drag_operation = helper_.OnDrop(*data_, root_view_location,
+                                  drag_operation);
+  GdkDragAction gdk_action =
+      static_cast<GdkDragAction>(
+          ui::DragDropTypes::DragOperationToGdkDragAction(drag_operation));
+  gtk_drag_finish(context, gdk_action != 0, (gdk_action & GDK_ACTION_MOVE),
+                  time);
+
+  static_cast<NativeWidgetGtk*>(helper_.root_view()->GetWidget()->
+      native_widget())->ResetDropTarget();
+  // WARNING: we've been deleted.
+}
+
+void DropTargetGtk::IntersectFormats(int f1, const std::set<GdkAtom>& cf1,
+                                     int* f2, std::set<GdkAtom>* cf2) {
+  *f2 = (*f2 & f1);
+  std::set<GdkAtom> cf;
+  std::set_intersection(
+      cf1.begin(), cf1.end(), cf2->begin(), cf2->end(),
+      std::insert_iterator<std::set<GdkAtom> >(cf, cf.begin()));
+  cf.swap(*cf2);
+}
+
+void DropTargetGtk::RequestFormats(GdkDragContext* context,
+                                   int formats,
+                                   const std::set<GdkAtom>& custom_formats,
+                                   guint time) {
+  GtkWidget* widget = static_cast<NativeWidgetGtk*>(helper_.root_view()->
+      GetWidget()->native_widget())->window_contents();
+
+  const std::set<GdkAtom>& known_formats =
+      data_provider().known_custom_formats();
+  if ((formats & OSExchangeData::STRING) != 0 &&
+      (requested_formats_ & OSExchangeData::STRING) == 0) {
+    requested_formats_ |= OSExchangeData::STRING;
+    if (known_formats.count(gdk_atom_intern("UTF8_STRING", false))) {
+      gtk_drag_get_data(widget, context,
+                        gdk_atom_intern("UTF8_STRING", false), time);
+    } else if (known_formats.count(gdk_atom_intern("text/plain;charset=utf-8",
+                                                   false))) {
+      gtk_drag_get_data(widget, context,
+                        gdk_atom_intern("text/plain;charset=utf-8", false),
+                        time);
+    } else if (known_formats.count(GDK_TARGET_STRING)) {
+      gtk_drag_get_data(widget, context, GDK_TARGET_STRING, time);
+    } else if (known_formats.count(gdk_atom_intern("text/plain", false))) {
+      gtk_drag_get_data(widget, context, gdk_atom_intern("text/plain", false),
+                        time);
+    } else if (known_formats.count(gdk_atom_intern("TEXT", false))) {
+        gtk_drag_get_data(widget, context, gdk_atom_intern("TEXT", false),
+                          time);
+    } else if (known_formats.count(gdk_atom_intern("STRING", false))) {
+      gtk_drag_get_data(widget, context, gdk_atom_intern("STRING", false),
+                        time);
+    }
+  }
+  if ((formats & OSExchangeData::URL) != 0 &&
+      (requested_formats_ & OSExchangeData::URL) == 0) {
+    requested_formats_ |= OSExchangeData::URL;
+    if (known_formats.count(ui::GetAtomForTarget(ui::CHROME_NAMED_URL))) {
+      gtk_drag_get_data(widget, context,
+                        ui::GetAtomForTarget(ui::CHROME_NAMED_URL), time);
+    } else if (known_formats.count(
+                   ui::GetAtomForTarget(ui::TEXT_URI_LIST))) {
+      gtk_drag_get_data(widget, context,
+                        ui::GetAtomForTarget(ui::TEXT_URI_LIST), time);
+    }
+  }
+  if (((formats & OSExchangeData::FILE_NAME) != 0) &&
+      (requested_formats_ & OSExchangeData::FILE_NAME) == 0) {
+    requested_formats_ |= OSExchangeData::FILE_NAME;
+    gtk_drag_get_data(widget, context,
+                      ui::GetAtomForTarget(ui::TEXT_URI_LIST), time);
+  }
+  for (std::set<GdkAtom>::const_iterator i = custom_formats.begin();
+       i != custom_formats.end(); ++i) {
+    if (requested_custom_formats_.find(*i) ==
+        requested_custom_formats_.end()) {
+      requested_custom_formats_.insert(*i);
+      gtk_drag_get_data(widget, context, *i, time);
+    }
+  }
+}
+
+OSExchangeDataProviderGtk& DropTargetGtk::data_provider() const {
+  return static_cast<OSExchangeDataProviderGtk&>(data_->provider());
+}
+
+}  // namespace views