GTK: handle dom_ui-generated download drag events.

BUG=36512
TEST=drag a file out of the downloads page

Review URL: http://codereview.chromium.org/657026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@39815 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 80 insertions, 0 deletions

diff --git a/chrome/browser/gtk/download_item_drag.cc b/chrome/browser/gtk/download_item_drag.cc
new file mode 100644
index 0000000..4106a91
--- /dev/null
+++ b/chrome/browser/gtk/download_item_drag.cc
@@ -0,0 +1,80 @@
+// Copyright (c) 2010 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_drag.h"
+
+#include "app/gfx/gtk_util.h"
+#include "app/gtk_dnd_util.h"
+#include "base/string_util.h"
+#include "chrome/browser/download/download_manager.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/net_util.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace {
+
+const int kCodeMask = GtkDndUtil::TEXT_URI_LIST |
+                      GtkDndUtil::CHROME_NAMED_URL;
+const GdkDragAction kDragAction = GDK_ACTION_COPY;
+
+void OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
+                   GtkSelectionData* selection_data,
+                   guint target_type, guint time,
+                   DownloadItem* download_item) {
+  GURL url = net::FilePathToFileURL(download_item->full_path());
+  GtkDndUtil::WriteURLWithName(selection_data, url,
+      UTF8ToUTF16(download_item->GetFileName().value()), target_type);
+}
+
+} // namespace
+
+// static
+void DownloadItemDrag::SetSource(GtkWidget* widget, DownloadItem* item) {
+  gtk_drag_source_set(widget, GDK_BUTTON1_MASK, NULL, 0,
+                      kDragAction);
+  GtkDndUtil::SetSourceTargetListFromCodeMask(widget, kCodeMask);
+  g_signal_connect(widget, "drag-data-get",
+                   G_CALLBACK(OnDragDataGet), item);
+}
+
+// static
+void DownloadItemDrag::BeginDrag(const DownloadItem* item, SkBitmap* icon) {
+  new DownloadItemDrag(item, icon);
+}
+
+DownloadItemDrag::DownloadItemDrag(const DownloadItem* item,
+                                   SkBitmap* icon)
+    : drag_widget_(gtk_invisible_new()),
+      pixbuf_(gfx::GdkPixbufFromSkBitmap(icon)) {
+  g_object_ref_sink(drag_widget_);
+  g_signal_connect(drag_widget_, "drag-data-get",
+                   G_CALLBACK(OnDragDataGet), const_cast<DownloadItem*>(item));
+  g_signal_connect(drag_widget_, "drag-begin",
+                   G_CALLBACK(OnDragBegin), this);
+  g_signal_connect(drag_widget_, "drag-end",
+                   G_CALLBACK(OnDragEnd), this);
+
+  GtkTargetList* list = GtkDndUtil::GetTargetListFromCodeMask(kCodeMask);
+  gtk_drag_begin(drag_widget_, list, kDragAction, 1, gtk_get_current_event());
+  gtk_target_list_unref(list);
+}
+
+DownloadItemDrag::~DownloadItemDrag() {
+  g_object_unref(pixbuf_);
+  g_object_unref(drag_widget_);
+}
+
+// static
+void DownloadItemDrag::OnDragBegin(GtkWidget* widget,
+                                   GdkDragContext* drag_context,
+                                   DownloadItemDrag* drag) {
+  gtk_drag_set_icon_pixbuf(drag_context, drag->pixbuf_, 0, 0);
+}
+
+// static
+void DownloadItemDrag::OnDragEnd(GtkWidget* widget,
+                                 GdkDragContext* drag_context,
+                                 DownloadItemDrag* drag) {
+  delete drag;
+}