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/*
Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "PluginContainerQt.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameView.h"
#include "Page.h"
#include "PlatformKeyboardEvent.h"
#include "PlatformWheelEvent.h"
#include "PluginView.h"
#include <QApplication>
#include <QX11Info>
using namespace WebCore;
PluginClientWrapper::PluginClientWrapper(QWidget* parent, WId client)
: QWidget(0, Qt::Popup)
{
// create a QWidget that adopts the plugin window id, do not give it
// a parent so that we don't end up handling events supposed to be
// handled by the QX11EmbedContainer.
// without the parent this will be considered a toplevel widget,
// and thus make Qt not quit the event loop after the last window
// has been closed. In order to work around this, we set the window
// type to Qt::Popup.
create(client, false, true);
m_parent = parent;
}
PluginClientWrapper::~PluginClientWrapper()
{
destroy(false, false);
}
bool PluginClientWrapper::x11Event(XEvent* event)
{
// modify the event window id and insert it into the Qt event system.
event->xany.window = m_parent->parentWidget()->winId();
static_cast<QApplication*>(QApplication::instance())->x11ProcessEvent(event);
return true;
}
PluginContainerQt::PluginContainerQt(PluginView* view, QWidget* parent)
: QX11EmbedContainer(parent)
, m_pluginView(view)
, m_clientWrapper(0)
{
connect(this, SIGNAL(clientClosed()), this, SLOT(on_clientClosed()));
connect(this, SIGNAL(clientIsEmbedded()), this, SLOT(on_clientIsEmbedded()));
}
PluginContainerQt::~PluginContainerQt()
{
delete m_clientWrapper;
m_pluginView->setPlatformPluginWidget(0);
}
void PluginContainerQt::on_clientClosed()
{
delete m_clientWrapper;
m_clientWrapper = 0;
}
void PluginContainerQt::on_clientIsEmbedded()
{
delete m_clientWrapper;
m_clientWrapper = 0;
// Only create a QWidget wrapper for the plugin in the case it isn't in the
// Qt window mapper, and thus receiving events from the Qt event system.
// This way the PluginClientWrapper receives the scroll events and passes
// them to the parent. NOTICE: Native Qt based plugins running in process,
// will already be in the window mapper, and thus creating a wrapper, stops
// them from getting events from Qt, as they are redirected to the wrapper.
if (!QWidget::find(clientWinId()))
m_clientWrapper = new PluginClientWrapper(this, clientWinId());
}
void PluginContainerQt::redirectWheelEventsToParent(bool enable)
{
// steal wheel events from the plugin as we want to handle it. When doing this
// all button 4, 5, 6, and 7, ButtonPress and ButtonRelease events are passed
// to the x11Event handler of the PluginClientWrapper, which then changes the
// window id of the event to the parent of PluginContainer and puts the event
// back into the Qt event loop, so that we will actually scroll the parent
// frame.
for (int buttonNo = 4; buttonNo < 8; buttonNo++) {
if (enable)
XGrabButton(x11Info().display(), buttonNo, AnyModifier, clientWinId(),
false, ButtonPressMask, GrabModeAsync, GrabModeAsync, 0L, 0L);
else
XUngrabButton(x11Info().display(), buttonNo, AnyModifier, clientWinId());
}
}
bool PluginContainerQt::x11Event(XEvent* event)
{
switch (event->type) {
case EnterNotify:
// if the plugin window doesn't have focus we do not want to send wheel
// events to it, but to the parent frame, so let's redirect here.
redirectWheelEventsToParent(!hasFocus());
break;
case LeaveNotify:
// it is always safe to ungrab wheel events when the mouse leaves the
// plugin window.
redirectWheelEventsToParent(false);
break;
}
return QX11EmbedContainer::x11Event(event);
}
void PluginContainerQt::focusInEvent(QFocusEvent* event)
{
// we got focus, stop redirecting the wheel events
redirectWheelEventsToParent(false);
if (Page* page = m_pluginView->parentFrame()->page())
page->focusController()->setActive(true);
m_pluginView->focusPluginElement();
}
void PluginContainerQt::focusOutEvent(QFocusEvent*)
{
if (Page* page = m_pluginView->parentFrame()->page())
page->focusController()->setActive(false);
}
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