File indexing completed on 2024-05-12 05:35:43

 /*
     SPDX-FileCopyrightText: 2010 Andriy Rysin <rysin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "layout_memory.h"
 #include "debug.h"
 
 #include <KWindowInfo>
 #include <KWindowSystem>
 #include <KX11Extras>
 
 #include "xkb_helper.h"
 
 LayoutMemory::LayoutMemory(const KeyboardConfig &keyboardConfig_)
     : prevLayoutList(X11Helper::getLayoutsList())
     , keyboardConfig(keyboardConfig_)
 {
     registerListeners();
 }
 
 LayoutMemory::~LayoutMemory()
 {
     unregisterListeners();
 }
 
 void LayoutMemory::configChanged()
 {
     //  this->layoutMap.clear();    // if needed this will be done on layoutMapChanged event
     unregisterListeners();
     registerListeners();
 }
 
 void LayoutMemory::registerListeners()
 {
     if (keyboardConfig.switchingPolicy() == KeyboardConfig::SWITCH_POLICY_WINDOW || keyboardConfig.switchingPolicy() == KeyboardConfig::SWITCH_POLICY_APPLICATION) {
         connect(KX11Extras::self(), &KX11Extras::activeWindowChanged, this, &LayoutMemory::windowChanged);
         //      connect(KWindowSystem::self(), SIGNAL(windowRemoved(WId)), this, SLOT(windowRemoved(WId)));
     }
     if (keyboardConfig.switchingPolicy() == KeyboardConfig::SWITCH_POLICY_DESKTOP) {
         connect(KX11Extras::self(), &KX11Extras::currentDesktopChanged, this, &LayoutMemory::desktopChanged);
     }
 }
 
 void LayoutMemory::unregisterListeners()
 {
     disconnect(KX11Extras::self(), &KX11Extras::activeWindowChanged, this, &LayoutMemory::windowChanged);
     disconnect(KX11Extras::self(), &KX11Extras::currentDesktopChanged, this, &LayoutMemory::desktopChanged);
     //  disconnect(KWindowSystem::self(), SIGNAL(windowRemoved(WId)), this, SLOT(windowRemoved(WId)));
 }
 
 QString LayoutMemory::getCurrentMapKey()
 {
     switch (keyboardConfig.switchingPolicy()) {
     case KeyboardConfig::SWITCH_POLICY_WINDOW: {
         WId wid = KX11Extras::self()->activeWindow();
         KWindowInfo winInfo(wid, NET::WMWindowType);
         NET::WindowType windowType = winInfo.windowType(NET::NormalMask | NET::DesktopMask | NET::DialogMask);
         qCDebug(KCM_KEYBOARD, ) << "window type" << windowType;
 
         // we ignore desktop type so that our keyboard layout applet on desktop could change layout properly
         if (windowType == NET::Desktop)
             return previousLayoutMapKey;
         if (windowType != NET::Unknown && windowType != NET::Normal && windowType != NET::Dialog)
             return QString();
 
         return QString::number(wid);
     }
     case KeyboardConfig::SWITCH_POLICY_APPLICATION: {
         WId wid = KX11Extras::self()->activeWindow();
         KWindowInfo winInfo(wid, NET::WMWindowType, NET::WM2WindowClass);
         NET::WindowType windowType = winInfo.windowType(NET::NormalMask | NET::DesktopMask | NET::DialogMask);
         qCDebug(KCM_KEYBOARD, ) << "window type" << windowType;
 
         // we ignore desktop type so that our keyboard layout applet on desktop could change layout properly
         if (windowType == NET::Desktop)
             return previousLayoutMapKey;
         if (windowType != NET::Unknown && windowType != NET::Normal && windowType != NET::Dialog)
             return QString();
 
         // shall we use pid or window class ??? - class seems better (see e.g. https://bugs.kde.org/show_bug.cgi?id=245507)
         // for window class shall we use class.class or class.name? (seem class.class is a bit better - more app-oriented)
         qCDebug(KCM_KEYBOARD, ) << "New active window with class.class: " << winInfo.windowClassClass();
         return QString(winInfo.windowClassClass());
         //      NETWinInfo winInfoForPid( QX11Info::display(), wid, QX11Info::appRootWindow(), NET::WMPid);
         //      return QString::number(winInfoForPid.pid());
     }
     case KeyboardConfig::SWITCH_POLICY_DESKTOP:
         return QString::number(KX11Extras::self()->currentDesktop());
     default:
         return QString();
     }
 }
 
 static bool isExtraSubset(const QList<LayoutUnit> &allLayouts, const QList<LayoutUnit> &newList)
 {
     if (allLayouts.isEmpty() || newList.isEmpty() || allLayouts.first() != newList.first())
         return false;
     for (const LayoutUnit &layoutUnit : newList) {
         if (!allLayouts.contains(layoutUnit))
             return false;
     }
     return true;
 }
 
 void LayoutMemory::layoutMapChanged()
 {
     QList<LayoutUnit> newLayoutList(X11Helper::getLayoutsList());
 
     if (prevLayoutList == newLayoutList)
         return;
 
     qCDebug(KCM_KEYBOARD, ) << "Layout map change: " << LayoutSet::toString(prevLayoutList) << "-->" << LayoutSet::toString(newLayoutList);
     prevLayoutList = newLayoutList;
 
     // TODO: need more thinking here on how to support external map resetting
     if (keyboardConfig.configureLayouts() && isExtraSubset(keyboardConfig.layouts, newLayoutList)) {
         qCDebug(KCM_KEYBOARD, ) << "Layout map change for extra layout";
         layoutChanged(); // to remember new map for active "window"
     } else {
         if (newLayoutList != keyboardConfig.getDefaultLayouts()) {
             qCDebug(KCM_KEYBOARD, ) << "Layout map change from external source: clearing layout memory";
             layoutMap.clear();
         }
     }
 }
 
 void LayoutMemory::layoutChanged()
 {
     QString layoutMapKey = getCurrentMapKey();
     if (layoutMapKey.isEmpty())
         return;
 
     layoutMap[layoutMapKey] = X11Helper::getCurrentLayouts();
 }
 
 void LayoutMemory::setCurrentLayoutFromMap()
 {
     QString layoutMapKey = getCurrentMapKey();
     if (layoutMapKey.isEmpty())
         return;
 
     if (!layoutMap.contains(layoutMapKey)) {
         //      qCDebug(KCM_KEYBOARD, ) << "new key for layout map" << layoutMapKey;
 
         if (!X11Helper::isDefaultLayout()) {
             //          qCDebug(KCM_KEYBOARD, ) << "setting default layout for container key" << layoutMapKey;
             if (keyboardConfig.configureLayouts() && X11Helper::getLayoutsList() != keyboardConfig.getDefaultLayouts()) {
                 XkbHelper::initializeKeyboardLayouts(keyboardConfig.getDefaultLayouts());
             }
             X11Helper::setDefaultLayout();
         }
     } else {
         LayoutSet layoutFromMap = layoutMap[layoutMapKey];
         qCDebug(KCM_KEYBOARD, ) << "Setting layout map item" << layoutFromMap.currentLayout.toString() << "for container key" << layoutMapKey;
 
         LayoutSet currentLayouts = X11Helper::getCurrentLayouts();
         if (layoutFromMap.layouts != currentLayouts.layouts) {
             if (keyboardConfig.configureLayouts()) {
                 XkbHelper::initializeKeyboardLayouts(layoutFromMap.layouts);
             }
             X11Helper::setLayout(layoutFromMap.currentLayout);
         } else if (layoutFromMap.currentLayout != currentLayouts.currentLayout) {
             X11Helper::setLayout(layoutFromMap.currentLayout);
         }
     }
 
     previousLayoutMapKey = layoutMapKey;
 }
 
 void LayoutMemory::windowChanged(WId /*wId*/)
 {
     setCurrentLayoutFromMap();
 }
 
 void LayoutMemory::desktopChanged(int /*desktop*/)
 {
     setCurrentLayoutFromMap();
 }