Session: Add cursor theme initialization

CMakeLists.txt

@@ -27,3 +27,4 @@ add_subdirectory(xembed-sni-proxy)
 add_subdirectory(powerman)
 add_subdirectory(cpufreq)
 add_subdirectory(chotkeys)
+add_subdirectory(cupdatecursor)

cupdatecursor/CMakeLists.txt

@@ -0,0 +1,17 @@
+find_package(Qt5 COMPONENTS Core Gui X11Extras REQUIRED)
+find_package(X11)
+
+add_executable(cupdatecursor
+  main.cpp
+)
+target_link_libraries(cupdatecursor
+    Qt5::Core
+    Qt5::Gui
+    Qt5::X11Extras
+    ${X11_LIBRARIES}
+    X11::X11
+    X11::Xi
+    X11::Xcursor
+)
+
+install(TARGETS cupdatecursor DESTINATION /usr/bin)

cupdatecursor/main.cpp

@@ -0,0 +1,53 @@
+#include <QGuiApplication>
+#include <QX11Info>
+#include <QFile>
+#include <QDebug>
+#include <QSettings>
+#include <QStandardPaths>
+
+#include <X11/X.h>
+#include <X11/Xcursor/Xcursor.h>
+
+inline void applyTheme(const QString &theme, int size)
+{
+    Display *display = QX11Info::display();
+
+    if (!theme.isEmpty())
+        XcursorSetTheme(display, QFile::encodeName(theme));
+
+    if (size >= 0)
+        XcursorSetDefaultSize(display, size);
+
+    Cursor handle = XcursorLibraryLoadCursor(display, "left_ptr");
+    XDefineCursor(display, DefaultRootWindow(display), handle);
+    XFreeCursor(display, handle);
+    XFlush(display);
+
+    // For KWin
+    QSettings settings(QStandardPaths::writableLocation(QStandardPaths::ConfigLocation) + "/kcminputrc",
+                       QSettings::IniFormat);
+    settings.beginGroup("Mouse");
+    settings.setValue("cursorTheme", theme);
+    settings.setValue("cursorSize", size);
+    settings.endGroup();
+    settings.sync();
+}
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication::setDesktopSettingsAware(false);
+    QGuiApplication a(argc, argv);
+
+    if (argc != 3)
+        return 1;
+
+    if (!QX11Info::isPlatformX11())
+        return 2;
+
+    QString theme = QFile::decodeName(argv[1]);
+    QString size = QFile::decodeName(argv[2]);
+
+    applyTheme(theme, size.toInt());
+
+    return 0;
+}

session/application.cpp

@@ -93,6 +93,7 @@ Application::Application(int &argc, char **argv)
     createConfigDirectory();
     initLanguage();
     initScreenScaleFactors();
+    initCursor();
     initFontDpi();
 
     initEnvironments();
@@ -169,6 +170,18 @@ void Application::initFontDpi()
     p.waitForFinished(-1);
 }
 
+void Application::initCursor()
+{
+    QSettings settings(QSettings::UserScope, "cutefishos", "theme");
+    qreal scaleFactor = settings.value("PixelRatio", 1.0).toReal();
+    QString theme = settings.value("cursorTheme", "default").toString();
+    int size = settings.value("cursorSize", 24).toInt();
+
+    runSync("cupdatecursor", {theme, QString::number(size * scaleFactor)});
+    qputenv("XCURSOR_THEME", theme.toLatin1());
+    qputenv("XCURSOR_SIZE", QByteArray::number(size * scaleFactor));
+}
+
 void Application::initLanguage()
 {
     QSettings settings(QSettings::UserScope, "cutefishos", "language");

session/application.h

@@ -64,6 +64,7 @@ public slots:
 private:
     void initEnvironments();
     void initFontDpi();
+    void initCursor();
     void initLanguage();
     void initScreenScaleFactors();
     bool syncDBusEnvironment();