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// 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 "chrome/browser/ui/gtk/custom_drag.h"
#include "base/files/file_path.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/ui/gtk/bookmarks/bookmark_utils_gtk.h"
#include "content/public/browser/download_item.h"
#include "googleurl/src/gurl.h"
#include "net/base/net_util.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/dragdrop/gtk_dnd_util.h"
#include "ui/gfx/gtk_util.h"
#include "ui/gfx/image/image.h"
using content::DownloadItem;
namespace {
const int kDownloadItemCodeMask = ui::TEXT_URI_LIST | ui::CHROME_NAMED_URL;
const GdkDragAction kDownloadItemDragAction = GDK_ACTION_COPY;
const GdkDragAction kBookmarkDragAction =
static_cast<GdkDragAction>(GDK_ACTION_COPY | GDK_ACTION_MOVE);
} // namespace
// CustomDrag ------------------------------------------------------------------
CustomDrag::CustomDrag(gfx::Image* icon, int code_mask, GdkDragAction action)
: drag_widget_(gtk_invisible_new()),
image_(icon) {
g_signal_connect(drag_widget_, "drag-data-get",
G_CALLBACK(OnDragDataGetThunk), this);
g_signal_connect(drag_widget_, "drag-begin",
G_CALLBACK(OnDragBeginThunk), this);
g_signal_connect(drag_widget_, "drag-end",
G_CALLBACK(OnDragEndThunk), this);
GtkTargetList* list = ui::GetTargetListFromCodeMask(code_mask);
GdkEvent* event = gtk_get_current_event();
gtk_drag_begin(drag_widget_, list, action, 1, event);
if (event)
gdk_event_free(event);
gtk_target_list_unref(list);
}
CustomDrag::~CustomDrag() {
gtk_widget_destroy(drag_widget_);
}
void CustomDrag::OnDragBegin(GtkWidget* widget, GdkDragContext* drag_context) {
if (image_)
gtk_drag_set_icon_pixbuf(drag_context, image_->ToGdkPixbuf(), 0, 0);
}
void CustomDrag::OnDragEnd(GtkWidget* widget, GdkDragContext* drag_context) {
delete this;
}
// DownloadItemDrag ------------------------------------------------------------
// Stores metadata for a drag & drop operation.
class DownloadItemDrag::DragData {
public:
// Constructs a DragData object based on the current state of |item|.
explicit DragData(const DownloadItem* item);
// 'drag-data-get' signal handler.
CHROMEGTK_CALLBACK_4(DragData, void, OnDragDataGet, GdkDragContext*,
GtkSelectionData*, guint, guint);
// Sets up a drag source and connects |drag_data| to 'drag-data-get' on
// |widget|. If |icon| is non-NULL it will be used as the drag icon. The
// object pointed to by |drag_data| will be deleted when the signal is
// disconnected.
static void AttachToWidget(scoped_ptr<DragData> drag_data,
GtkWidget* widget,
gfx::Image* icon);
private:
// GClosureNotify handler for destroying a DragData object. |data| is assumed
// to be a DragData*.
static void OnDestroy(gpointer data, GClosure* closure);
GURL url_;
string16 display_name_;
};
DownloadItemDrag::DragData::DragData(const DownloadItem* item)
: url_(net::FilePathToFileURL(item->GetTargetFilePath())),
display_name_(item->GetFileNameToReportUser().LossyDisplayName()) {
DCHECK(item->IsComplete());
}
void DownloadItemDrag::DragData::OnDragDataGet(GtkWidget* widget,
GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type,
guint time) {
ui::WriteURLWithName(selection_data, url_, display_name_, target_type);
}
// static
void DownloadItemDrag::DragData::AttachToWidget(scoped_ptr<DragData> drag_data,
GtkWidget* widget,
gfx::Image* icon) {
gtk_drag_source_set(widget, GDK_BUTTON1_MASK, NULL, 0,
kDownloadItemDragAction);
ui::SetSourceTargetListFromCodeMask(widget, kDownloadItemCodeMask);
// Disconnect previous signal handlers, if any.
g_signal_handlers_disconnect_matched(
widget, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
reinterpret_cast<gpointer>(&OnDragDataGetThunk),
NULL);
// Connect new signal handlers.
g_signal_connect_data(
widget, "drag-data-get",
G_CALLBACK(&OnDragDataGetThunk),
reinterpret_cast<gpointer>(drag_data.release()),
&OnDestroy,
static_cast<GConnectFlags>(0));
if (icon)
gtk_drag_source_set_icon_pixbuf(widget, icon->ToGdkPixbuf());
}
// static
void DownloadItemDrag::DragData::OnDestroy(gpointer data, GClosure* closure) {
DragData* drag_data = reinterpret_cast<DragData*>(data);
delete drag_data;
}
DownloadItemDrag::DownloadItemDrag(const DownloadItem* item,
gfx::Image* icon)
: CustomDrag(icon, kDownloadItemCodeMask, kDownloadItemDragAction),
drag_data_(new DragData(item)) {
}
DownloadItemDrag::~DownloadItemDrag() {
}
void DownloadItemDrag::OnDragDataGet(
GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time) {
drag_data_->OnDragDataGet(widget, context, selection_data, target_type, time);
}
// static
void DownloadItemDrag::SetSource(GtkWidget* widget,
const DownloadItem* item,
gfx::Image* icon) {
scoped_ptr<DragData> drag_data(new DragData(item));
DragData::AttachToWidget(drag_data.Pass(), widget, icon);
}
// static
void DownloadItemDrag::BeginDrag(const DownloadItem* item, gfx::Image* icon) {
new DownloadItemDrag(item, icon);
}
// BookmarkDrag ----------------------------------------------------------------
BookmarkDrag::BookmarkDrag(Profile* profile,
const std::vector<const BookmarkNode*>& nodes)
: CustomDrag(NULL,
bookmark_utils::GetCodeMask(false),
kBookmarkDragAction),
profile_(profile),
nodes_(nodes) {
}
BookmarkDrag::~BookmarkDrag() {
}
void BookmarkDrag::OnDragDataGet(GtkWidget* widget, GdkDragContext* context,
GtkSelectionData* selection_data,
guint target_type, guint time) {
bookmark_utils::WriteBookmarksToSelection(nodes_, selection_data,
target_type, profile_);
}
// static
void BookmarkDrag::BeginDrag(Profile* profile,
const std::vector<const BookmarkNode*>& nodes) {
new BookmarkDrag(profile, nodes);
}
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