fix: set cursor on root window

CHANGELOG

@@ -4,6 +4,7 @@
 * update kotlin version to 1.5.10
 * adjust ordering of monitors by y and x values
 * include alternative actions window-move-next and window-move-previous
+* set cursor on root window
 
 21.2
 * fix window toggling (forward)

src/nativeInterop/cinterop/xlib.def

@@ -5,6 +5,7 @@ headers = X11/Xlib.h \
     X11/xpm.h \
     X11/extensions/Xrandr.h \
     X11/XF86keysym.h \
+    X11/cursorfont.h \
     pango/pango.h \
     pango/pangoxft.h \
     libxml/parser.h

src/nativeMain/kotlin/de/atennert/lcarswm/lifecycle/startup.kt

@@ -101,6 +101,8 @@ fun startup(system: SystemApi, logger: Logger): RuntimeResources? {
 
     system.setErrorHandler(staticCFunction { _, err -> staticLogger?.logError("::runWindowManager::error code: ${err?.pointed?.error_code}"); 0 })
 
+    system.defineCursor(screen.root, system.createFontCursor(XC_left_ptr))
+
     rootWindowPropertyHandler
         .closeWith(RootWindowPropertyHandler::unsetWindowProperties)
         .setSupportWindowProperties()

src/nativeMain/kotlin/de/atennert/lcarswm/system/SystemFacade.kt

@@ -413,6 +413,14 @@ class SystemFacade : SystemApi {
         return XUngrabButton(display, button, modifiers, window)
     }
 
+    override fun createFontCursor(fontValue: Int): Cursor {
+        return XCreateFontCursor(display, fontValue.convert())
+    }
+
+    override fun defineCursor(window: Window, cursor: Cursor): Int {
+        return XDefineCursor(display, window, cursor)
+    }
+
     override fun allowEvents(eventMode: Int, time: Time) {
         XAllowEvents(display, eventMode, time)
     }

src/nativeMain/kotlin/de/atennert/lcarswm/system/api/InputApi.kt

@@ -25,6 +25,10 @@ interface InputApi {
 
     fun ungrabButton(button: UInt, modifiers: UInt, window: Window): Int
 
+    fun createFontCursor(fontValue: Int): Cursor
+
+    fun defineCursor(window: Window, cursor: Cursor): Int
+
     fun getModifierMapping(): CPointer<XModifierKeymap>?
 
     fun getDisplayKeyCodeMinMaxCounts(): Pair<Int, Int>

src/nativeTest/kotlin/de/atennert/lcarswm/system/SystemFacadeMock.kt

@@ -230,6 +230,14 @@ open class SystemFacadeMock : SystemApi {
         return 0
     }
 
+    override fun createFontCursor(fontValue: Int): Cursor {
+        return 0.convert()
+    }
+
+    override fun defineCursor(window: Window, cursor: Cursor): Int {
+        return 1
+    }
+
     override fun allowEvents(eventMode: Int, time: Time) {
         functionCalls.add(FunctionCall("allowEvents", eventMode, time))
     }