GTK: Download item as drag source....

chrome/browser/gtk/download_item_gtk.cc

 // Copyright (c) 2009 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 "chrome/browser/gtk/download_item_gtk.h"
 
 #include "app/l10n_util.h"
 #include "app/gfx/canvas_paint.h"
 #include "app/gfx/font.h"
 #include "app/gfx/text_elider.h"
+#include "app/gtk_dnd_util.h"
 #include "app/resource_bundle.h"
 #include "app/slide_animation.h"
 #include "base/basictypes.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/gtk/download_shelf_gtk.h"
 #include "chrome/browser/gtk/gtk_theme_provider.h"
 #include "chrome/browser/gtk/menu_gtk.h"
 #include "chrome/browser/gtk/nine_box.h"
 #include "chrome/browser/gtk/standard_menus.h"
 #include "chrome/common/gtk_util.h"
 #include "chrome/common/notification_service.h"
+#include "net/base/net_util.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace {
 
 // The width of the |menu_button_| widget. It has to be at least as wide as the
 // bitmap that we use to draw it, i.e. 16, but can be more.
 const int kMenuButtonWidth = 16;
 
@@ skipping 172 matching lines @@
                    G_CALLBACK(OnExpose), this);
   g_signal_connect(body_.get(), "clicked",
                    G_CALLBACK(OnClick), this);
   GTK_WIDGET_UNSET_FLAGS(body_.get(), GTK_CAN_FOCUS);
   // Remove internal padding on the button.
   GtkRcStyle* no_padding_style = gtk_rc_style_new();
   no_padding_style->xthickness = 0;
   no_padding_style->ythickness = 0;
   gtk_widget_modify_style(body_.get(), no_padding_style);
   g_object_unref(no_padding_style);
 

[Nico, 2009/09/18 01:05:42]

is this newline intentional? i don't care either way, but i rarely see 2
consecutive newlines in chrome source, and the style guide says something along
the lines of "compress vertically" iirc.

[Evan Stade, 2009/09/18 02:43:42]

nope, fixed

+
   name_label_ = gtk_label_new(NULL);
 
   // TODO(estade): This is at best an educated guess, since we don't actually
   // use gfx::Font() to draw the text. This is why we need to add so
   // much padding when we set the size request. We need to either use gfx::Font
   // or somehow extend TextElider.
   UpdateNameLabel();
 
   status_label_ = gtk_label_new(NULL);
   // Left align and vertically center the labels.
@@ skipping 150 matching lines @@
   switch (download->state()) {
     case DownloadItem::REMOVING:
       parent_shelf_->RemoveDownloadItem(this);  // This will delete us!
       return;
     case DownloadItem::CANCELLED:
       StopDownloadProgress();
       gtk_widget_queue_draw(progress_area_.get());
       break;
     case DownloadItem::COMPLETE:
       StopDownloadProgress();
+
+      // Set up the widget as a drag source.
+      gtk_drag_source_set(body_.get(), GDK_BUTTON1_MASK, NULL, 0,
+                          GDK_ACTION_COPY);
+      GtkDndUtil::SetSourceTargetListFromCodeMask(body_.get(),
+                                                  GtkDndUtil::TEXT_URI_LIST |
+                                                  GtkDndUtil::CHROME_NAMED_URL);
+      g_signal_connect(body_.get(), "drag-data-get",
+                       G_CALLBACK(OnDragDataGet), this);
+
       complete_animation_.reset(new SlideAnimation(this));
       complete_animation_->SetSlideDuration(kCompleteAnimationDurationMs);
       complete_animation_->SetTweenType(SlideAnimation::NONE);
       complete_animation_->Show();
       break;
     case DownloadItem::IN_PROGRESS:
       get_download()->is_paused() ?
           StopDownloadProgress() : StartDownloadProgress();
       break;
     default:
@@ skipping 443 matching lines @@
   if (l10n_util::GetTextDirection() == l10n_util::RIGHT_TO_LEFT)
     out_of_bounds = !out_of_bounds;
 
   if (out_of_bounds)
     gtk_widget_hide(item->hbox_.get());
   else
     gtk_widget_show(item->hbox_.get());
 }
 
 // static
+void DownloadItemGtk::OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                                    GtkSelectionData* selection_data,
+                                    guint target_type, guint time,
+                                    DownloadItemGtk* item) {
+  GURL url = net::FilePathToFileURL(
+      item->get_download()->full_path());

[Nico, 2009/09/18 01:05:42]

This looks like it might fit into one line.

[Evan Stade, 2009/09/18 02:43:42]

so it does

+
+  GtkDndUtil::WriteURLWithName(selection_data, url,
+      UTF8ToUTF16(item->get_download()->GetFileName().value()), target_type);
+}
+
+// static
 gboolean DownloadItemGtk::OnDangerousPromptExpose(GtkWidget* widget,
     GdkEventExpose* event, DownloadItemGtk* item) {
   if (!item->theme_provider_->UseGtkTheme()) {
     // The hbox renderer will take care of the border when in GTK mode.
     dangerous_nine_box_->RenderToWidget(widget);
   }
   return FALSE;  // Continue propagation.
 }
 
 // static
 void DownloadItemGtk::OnDangerousAccept(GtkWidget* button,
                                         DownloadItemGtk* item) {
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.save_download",
                            base::Time::Now() - item->creation_time_);
   item->get_download()->manager()->DangerousDownloadValidated(
       item->get_download());
 }
 
 // static
 void DownloadItemGtk::OnDangerousDecline(GtkWidget* button,
                                          DownloadItemGtk* item) {
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.discard_download",
                            base::Time::Now() - item->creation_time_);
   if (item->get_download()->state() == DownloadItem::IN_PROGRESS)
     item->get_download()->Cancel(true);
   item->get_download()->Remove(true);
 }