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/*
* Copyright (C) 2009, 2010 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "DragClientGtk.h"
#include "ClipboardGtk.h"
#include "ClipboardUtilitiesGtk.h"
#include "DataObjectGtk.h"
#include "Document.h"
#include "DragController.h"
#include "Element.h"
#include "Frame.h"
#include "GOwnPtrGtk.h"
#include "GRefPtrGtk.h"
#include "GtkVersioning.h"
#include "NotImplemented.h"
#include "PasteboardHelper.h"
#include "RenderObject.h"
#include "webkitwebframeprivate.h"
#include "webkitwebviewprivate.h"
#include "webkitwebview.h"
#include <gdk/gdk.h>
#include <gtk/gtk.h>
using namespace WebCore;
namespace WebKit {
#ifdef GTK_API_VERSION_2
static gboolean dragIconWindowDrawEventCallback(GtkWidget* widget, GdkEventExpose* event, DragClient* client)
{
RefPtr<cairo_t> context = adoptRef(gdk_cairo_create(event->window));
client->drawDragIconWindow(widget, context.get());
return TRUE;
}
#else
static gboolean dragIconWindowDrawEventCallback(GtkWidget* widget, cairo_t* context, DragClient* client)
{
if (!gdk_cairo_get_clip_rectangle(context, 0))
return FALSE;
client->drawDragIconWindow(widget, context);
return TRUE;
}
#endif // GTK_API_VERSION_2
DragClient::DragClient(WebKitWebView* webView)
: m_webView(webView)
, m_startPos(0, 0)
, m_dragIconWindow(gtk_window_new(GTK_WINDOW_POPUP))
{
#ifdef GTK_API_VERSION_2
g_signal_connect(m_dragIconWindow, "expose-event", G_CALLBACK(dragIconWindowDrawEventCallback), this);
#else
g_signal_connect(m_dragIconWindow, "draw", G_CALLBACK(dragIconWindowDrawEventCallback), this);
#endif
}
DragClient::~DragClient()
{
gtk_widget_destroy(m_dragIconWindow);
}
void DragClient::willPerformDragDestinationAction(DragDestinationAction, DragData*)
{
}
void DragClient::willPerformDragSourceAction(DragSourceAction, const IntPoint& startPos, Clipboard*)
{
m_startPos = startPos;
}
DragDestinationAction DragClient::actionMaskForDrag(DragData*)
{
notImplemented();
return DragDestinationActionAny;
}
DragSourceAction DragClient::dragSourceActionMaskForPoint(const IntPoint&)
{
notImplemented();
return DragSourceActionAny;
}
void DragClient::startDrag(DragImageRef image, const IntPoint& dragImageOrigin, const IntPoint& eventPos, Clipboard* clipboard, Frame* frame, bool linkDrag)
{
ClipboardGtk* clipboardGtk = reinterpret_cast<ClipboardGtk*>(clipboard);
WebKitWebView* webView = webkit_web_frame_get_web_view(kit(frame));
RefPtr<DataObjectGtk> dataObject = clipboardGtk->dataObject();
GRefPtr<GtkTargetList> targetList(clipboardGtk->helper()->targetListForDataObject(dataObject.get()));
GOwnPtr<GdkEvent> currentEvent(gtk_get_current_event());
GdkDragContext* context = gtk_drag_begin(GTK_WIDGET(m_webView), targetList.get(), dragOperationToGdkDragActions(clipboard->sourceOperation()), 1, currentEvent.get());
webView->priv->draggingDataObjects.set(context, dataObject);
// A drag starting should prevent a double-click from happening. This might
// happen if a drag is followed very quickly by another click (like in the DRT).
webView->priv->previousClickTime = 0;
// This strategy originally comes from Chromium:
// src/chrome/browser/gtk/tab_contents_drag_source.cc
if (image) {
m_dragImage = image;
IntSize imageSize(cairo_image_surface_get_width(image), cairo_image_surface_get_height(image));
gtk_window_resize(GTK_WINDOW(m_dragIconWindow), imageSize.width(), imageSize.height());
if (!gtk_widget_get_realized(m_dragIconWindow)) {
GdkScreen* screen = gtk_widget_get_screen(m_dragIconWindow);
#ifdef GTK_API_VERSION_2
GdkColormap* rgba = gdk_screen_get_rgba_colormap(screen);
if (rgba)
gtk_widget_set_colormap(m_dragIconWindow, rgba);
#else
GdkVisual* visual = gdk_screen_get_rgba_visual(screen);
if (!visual)
visual = gdk_screen_get_system_visual(screen);
gtk_widget_set_visual(m_dragIconWindow, visual);
#endif // GTK_API_VERSION_2
}
IntSize origin = eventPos - dragImageOrigin;
gtk_drag_set_icon_widget(context, m_dragIconWindow,
origin.width(), origin.height());
} else
gtk_drag_set_icon_default(context);
}
void DragClient::drawDragIconWindow(GtkWidget* widget, cairo_t* context)
{
cairo_rectangle(context, 0, 0,
cairo_image_surface_get_width(m_dragImage.get()),
cairo_image_surface_get_height(m_dragImage.get()));
cairo_set_operator(context, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(context, m_dragImage.get(), 0, 0);
cairo_fill(context);
}
void DragClient::dragControllerDestroyed()
{
delete this;
}
}
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