File indexing completed on 2024-11-10 04:56:35

 /*
     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 "x11_standalone_effects.h"
 #include "cursor.h"
 #include "screenedge.h"
 #include "utils/common.h"
 #include "workspace.h"
 #include "x11_standalone_backend.h"
 #include "x11_standalone_effects_keyboard_interception_filter.h"
 #include "x11_standalone_effects_mouse_interception_filter.h"
 #include "x11_standalone_keyboard.h"
 
 namespace KWin
 {
 
 EffectsHandlerX11::EffectsHandlerX11(Compositor *compositor, WorkspaceScene *scene)
     : EffectsHandler(compositor, scene)
 {
     connect(this, &EffectsHandler::virtualScreenGeometryChanged, this, [this]() {
         if (m_mouseInterceptionWindow.isValid()) {
             m_mouseInterceptionWindow.setGeometry(virtualScreenGeometry());
         }
     });
 }
 
 EffectsHandlerX11::~EffectsHandlerX11()
 {
     // EffectsHandler 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 EffectsHandlerX11::doGrabKeyboard()
 {
     auto keyboard = static_cast<X11StandaloneBackend *>(kwinApp()->outputBackend())->keyboard();
     if (!keyboard->xkbKeymap()) {
         return false;
     }
     bool ret = grabXKeyboard();
     if (!ret) {
         return false;
     }
     m_x11KeyboardInterception = std::make_unique<EffectsKeyboardInterceptionX11Filter>(this, keyboard);
     return ret;
 }
 
 void EffectsHandlerX11::doUngrabKeyboard()
 {
     ungrabXKeyboard();
     m_x11KeyboardInterception.reset();
 }
 
 void EffectsHandlerX11::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 = workspace()->geometry().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.
     workspace()->screenEdges()->ensureOnTop();
 }
 
 void EffectsHandlerX11::doStopMouseInterception()
 {
     m_mouseInterceptionWindow.unmap();
     m_x11MouseInterception.reset();
     Workspace::self()->stackScreenEdgesUnderOverrideRedirect();
 }
 
 void EffectsHandlerX11::defineCursor(Qt::CursorShape shape)
 {
     const xcb_cursor_t c = Cursors::self()->mouse()->x11Cursor(shape);
     if (c != XCB_CURSOR_NONE) {
         m_mouseInterceptionWindow.defineCursor(c);
     }
 }
 
 void EffectsHandlerX11::doCheckInputWindowStacking()
 {
     m_mouseInterceptionWindow.raise();
     // Raise electric border windows above the input windows
     // so they can still be triggered. TODO: Do both at once.
     workspace()->screenEdges()->ensureOnTop();
 }
 
 }
 
 #include "moc_x11_standalone_effects.cpp"