kwin/plugins/platforms/x11/standalone/effects_x11.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
SPDX-FileCopyrightText: 2010, 2011, 2017 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*********************************************************************/
#include "effects_x11.h"
#include "effects_mouse_interception_x11_filter.h"
#include "cursor.h"
#include "screenedge.h"
#include "screens.h"
#include "utils.h"
#include "workspace.h"
#include <QDesktopWidget>
namespace KWin
{
EffectsHandlerImplX11::EffectsHandlerImplX11(Compositor *compositor, Scene *scene)
: EffectsHandlerImpl(compositor, scene)
{
connect(this, &EffectsHandlerImpl::screenGeometryChanged, this,
[this] (const QSize &size) {
if (m_mouseInterceptionWindow.isValid()) {
m_mouseInterceptionWindow.setGeometry(QRect(0, 0, size.width(), size.height()));
}
}
);
}
EffectsHandlerImplX11::~EffectsHandlerImplX11()
{
// EffectsHandlerImpl tries to unload all effects when it's destroyed.
// The routine that unloads effects makes some calls (indirectly) to
// doUngrabKeyboard and doStopMouseInterception, which are virtual.
// Given that any call to a virtual function in the destructor of a base
// class will never go to a derived class, we have to unload effects
// here. Yeah, this is quite a bit ugly but it's fine; someday, X11
// will be dead (or not?).
unloadAllEffects();
}
bool EffectsHandlerImplX11::doGrabKeyboard()
{
bool ret = grabXKeyboard();
if (!ret)
return false;
// Workaround for Qt 5.9 regression introduced with 2b34aefcf02f09253473b096eb4faffd3e62b5f4
// we no longer get any events for the root window, one needs to call winId() on the desktop window
// TODO: change effects event handling to create the appropriate QKeyEvent without relying on Qt
// as it's done already in the Wayland case.
qApp->desktop()->winId();
return ret;
}
void EffectsHandlerImplX11::doUngrabKeyboard()
{
ungrabXKeyboard();
}
void EffectsHandlerImplX11::doStartMouseInterception(Qt::CursorShape shape)
{
// NOTE: it is intended to not perform an XPointerGrab on X11. See documentation in kwineffects.h
// The mouse grab is implemented by using a full screen input only window
if (!m_mouseInterceptionWindow.isValid()) {
const QSize &s = screens()->size();
const QRect geo(0, 0, s.width(), s.height());
const uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
const uint32_t values[] = {
true,
XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION
};
m_mouseInterceptionWindow.reset(Xcb::createInputWindow(geo, mask, values));
defineCursor(shape);
} else {
defineCursor(shape);
}
m_mouseInterceptionWindow.map();
m_mouseInterceptionWindow.raise();
m_x11MouseInterception = std::make_unique<EffectsMouseInterceptionX11Filter>(m_mouseInterceptionWindow, this);
// Raise electric border windows above the input windows
// so they can still be triggered.
ScreenEdges::self()->ensureOnTop();
}
void EffectsHandlerImplX11::doStopMouseInterception()
{
m_mouseInterceptionWindow.unmap();
m_x11MouseInterception.reset();
Workspace::self()->stackScreenEdgesUnderOverrideRedirect();
}
void EffectsHandlerImplX11::defineCursor(Qt::CursorShape shape)
{
const xcb_cursor_t c = Cursors::self()->mouse()->x11Cursor(shape);
if (c != XCB_CURSOR_NONE) {
m_mouseInterceptionWindow.defineCursor(c);
}
}
void EffectsHandlerImplX11::doCheckInputWindowStacking()
{
m_mouseInterceptionWindow.raise();
// Raise electric border windows above the input windows
// so they can still be triggered. TODO: Do both at once.
ScreenEdges::self()->ensureOnTop();
}
}