File indexing completed on 2024-05-19 16:34:57

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 1999, 2000 Matthias Ettrich <ettrich@kde.org>
     SPDX-FileCopyrightText: 2003 Lubos Lunak <l.lunak@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 /*
 
  This file is for (very) small utility functions/classes.
 
 */
 
 #include "utils/common.h"
 #include "utils/c_ptr.h"
 
 #include <QPainter>
 #include <QWidget>
 #include <kkeyserver.h>
 
 #ifndef KCMRULES
 #include <QApplication>
 #include <QDebug>
 #endif
 
 Q_LOGGING_CATEGORY(KWIN_CORE, "kwin_core", QtWarningMsg)
 Q_LOGGING_CATEGORY(KWIN_OPENGL, "kwin_scene_opengl", QtWarningMsg)
 Q_LOGGING_CATEGORY(KWIN_QPAINTER, "kwin_scene_qpainter", QtWarningMsg)
 Q_LOGGING_CATEGORY(KWIN_VIRTUALKEYBOARD, "kwin_virtualkeyboard", QtWarningMsg)
 namespace KWin
 {
 
 #ifndef KCMRULES
 
 //************************************
 // StrutRect
 //************************************
 
 StrutRect::StrutRect(QRect rect, StrutArea area)
     : QRect(rect)
     , m_area(area)
 {
 }
 
 StrutRect::StrutRect(int x, int y, int width, int height, StrutArea area)
     : QRect(x, y, width, height)
     , m_area(area)
 {
 }
 
 StrutRect::StrutRect(const StrutRect &other)
     : QRect(other)
     , m_area(other.area())
 {
 }
 
 StrutRect &StrutRect::operator=(const StrutRect &other)
 {
     if (this != &other) {
         QRect::operator=(other);
         m_area = other.area();
     }
     return *this;
 }
 
 static int server_grab_count = 0;
 
 void grabXServer()
 {
     if (++server_grab_count == 1) {
         xcb_grab_server(connection());
     }
 }
 
 void ungrabXServer()
 {
     Q_ASSERT(server_grab_count > 0);
     if (--server_grab_count == 0) {
         xcb_ungrab_server(connection());
         xcb_flush(connection());
     }
 }
 
 static bool keyboard_grabbed = false;
 
 bool grabXKeyboard(xcb_window_t w)
 {
     if (QWidget::keyboardGrabber() != nullptr) {
         return false;
     }
     if (keyboard_grabbed) {
         qCDebug(KWIN_CORE) << "Failed to grab X Keyboard: already grabbed by us";
         return false;
     }
     if (qApp->activePopupWidget() != nullptr) {
         qCDebug(KWIN_CORE) << "Failed to grab X Keyboard: no popup widget";
         return false;
     }
     if (w == XCB_WINDOW_NONE) {
         w = rootWindow();
     }
     const xcb_grab_keyboard_cookie_t c = xcb_grab_keyboard_unchecked(connection(), false, w, xTime(),
                                                                      XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
     UniqueCPtr<xcb_grab_keyboard_reply_t> grab(xcb_grab_keyboard_reply(connection(), c, nullptr));
     if (!grab) {
         qCDebug(KWIN_CORE) << "Failed to grab X Keyboard: grab null";
         return false;
     }
     if (grab->status != XCB_GRAB_STATUS_SUCCESS) {
         qCDebug(KWIN_CORE) << "Failed to grab X Keyboard: grab failed with status" << grab->status;
         return false;
     }
     keyboard_grabbed = true;
     return true;
 }
 
 void ungrabXKeyboard()
 {
     if (!keyboard_grabbed) {
         // grabXKeyboard() may fail sometimes, so don't fail, but at least warn anyway
         qCDebug(KWIN_CORE) << "ungrabXKeyboard() called but keyboard not grabbed!";
     }
     keyboard_grabbed = false;
     xcb_ungrab_keyboard(connection(), XCB_TIME_CURRENT_TIME);
 }
 
 #endif
 
 // converting between X11 mouse/keyboard state mask and Qt button/keyboard states
 
 Qt::MouseButton x11ToQtMouseButton(int button)
 {
     if (button == XCB_BUTTON_INDEX_1) {
         return Qt::LeftButton;
     }
     if (button == XCB_BUTTON_INDEX_2) {
         return Qt::MiddleButton;
     }
     if (button == XCB_BUTTON_INDEX_3) {
         return Qt::RightButton;
     }
     if (button == XCB_BUTTON_INDEX_4) {
         return Qt::XButton1;
     }
     if (button == XCB_BUTTON_INDEX_5) {
         return Qt::XButton2;
     }
     return Qt::NoButton;
 }
 
 Qt::MouseButtons x11ToQtMouseButtons(int state)
 {
     Qt::MouseButtons ret = {};
     if (state & XCB_KEY_BUT_MASK_BUTTON_1) {
         ret |= Qt::LeftButton;
     }
     if (state & XCB_KEY_BUT_MASK_BUTTON_2) {
         ret |= Qt::MiddleButton;
     }
     if (state & XCB_KEY_BUT_MASK_BUTTON_3) {
         ret |= Qt::RightButton;
     }
     if (state & XCB_KEY_BUT_MASK_BUTTON_4) {
         ret |= Qt::XButton1;
     }
     if (state & XCB_KEY_BUT_MASK_BUTTON_5) {
         ret |= Qt::XButton2;
     }
     return ret;
 }
 
 Qt::KeyboardModifiers x11ToQtKeyboardModifiers(int state)
 {
     Qt::KeyboardModifiers ret = {};
     if (state & XCB_KEY_BUT_MASK_SHIFT) {
         ret |= Qt::ShiftModifier;
     }
     if (state & XCB_KEY_BUT_MASK_CONTROL) {
         ret |= Qt::ControlModifier;
     }
     if (state & KKeyServer::modXAlt()) {
         ret |= Qt::AltModifier;
     }
     if (state & KKeyServer::modXMeta()) {
         ret |= Qt::MetaModifier;
     }
     return ret;
 }
 
 QPointF popupOffset(const QRectF &anchorRect, const Qt::Edges anchorEdge, const Qt::Edges gravity, const QSizeF popupSize)
 {
     QPointF anchorPoint;
     switch (anchorEdge & (Qt::LeftEdge | Qt::RightEdge)) {
     case Qt::LeftEdge:
         anchorPoint.setX(anchorRect.x());
         break;
     case Qt::RightEdge:
         anchorPoint.setX(anchorRect.x() + anchorRect.width());
         break;
     default:
         anchorPoint.setX(qRound(anchorRect.x() + anchorRect.width() / 2.0));
     }
     switch (anchorEdge & (Qt::TopEdge | Qt::BottomEdge)) {
     case Qt::TopEdge:
         anchorPoint.setY(anchorRect.y());
         break;
     case Qt::BottomEdge:
         anchorPoint.setY(anchorRect.y() + anchorRect.height());
         break;
     default:
         anchorPoint.setY(qRound(anchorRect.y() + anchorRect.height() / 2.0));
     }
 
     // calculate where the top left point of the popup will end up with the applied gravity
     // gravity indicates direction. i.e if gravitating towards the top the popup's bottom edge
     // will next to the anchor point
     QPointF popupPosAdjust;
     switch (gravity & (Qt::LeftEdge | Qt::RightEdge)) {
     case Qt::LeftEdge:
         popupPosAdjust.setX(-popupSize.width());
         break;
     case Qt::RightEdge:
         popupPosAdjust.setX(0);
         break;
     default:
         popupPosAdjust.setX(qRound(-popupSize.width() / 2.0));
     }
     switch (gravity & (Qt::TopEdge | Qt::BottomEdge)) {
     case Qt::TopEdge:
         popupPosAdjust.setY(-popupSize.height());
         break;
     case Qt::BottomEdge:
         popupPosAdjust.setY(0);
         break;
     default:
         popupPosAdjust.setY(qRound(-popupSize.height() / 2.0));
     }
 
     return anchorPoint + popupPosAdjust;
 }
 
 QRectF gravitateGeometry(const QRectF &rect, const QRectF &bounds, Gravity gravity)
 {
     QRectF geometry = rect;
 
     switch (gravity) {
     case Gravity::TopLeft:
         geometry.moveRight(bounds.right());
         geometry.moveBottom(bounds.bottom());
         break;
     case Gravity::Top:
     case Gravity::TopRight:
         geometry.moveLeft(bounds.left());
         geometry.moveBottom(bounds.bottom());
         break;
     case Gravity::Right:
     case Gravity::BottomRight:
     case Gravity::Bottom:
     case Gravity::None:
         geometry.moveLeft(bounds.left());
         geometry.moveTop(bounds.top());
         break;
     case Gravity::BottomLeft:
     case Gravity::Left:
         geometry.moveRight(bounds.right());
         geometry.moveTop(bounds.top());
         break;
     }
 
     return geometry;
 }
 
 } // namespace
 
 #ifndef KCMRULES
 #endif