Use the new glfw API to set WM_CLASS if available

kitty/glfw.c

@@ -208,6 +208,18 @@ glfw_get_key_name(PyObject UNUSED *self, PyObject *args) {
     return Py_BuildValue("s", glfwGetKeyName(key, scancode));
 }
 
+PyObject*
+glfw_init_hint_string(PyObject UNUSED *self, PyObject *args) {
+    int hint_id;
+    char *hint;
+    if (!PyArg_ParseTuple(args, "is", &hint_id, &hint)) return NULL;
+#ifdef glfwInitHintString
+    glfwInitHintString(hint_id, hint);
+#endif
+    Py_RETURN_NONE;
+}
+
+
 // }}}
 
 static void
@@ -448,6 +460,10 @@ init_glfw(PyObject *m) {
     PyEval_InitThreads();
     glfwSetErrorCallback(cb_error_callback);
 #define ADDC(n) if(PyModule_AddIntConstant(m, #n, n) != 0) return false;
+#ifdef GLFW_X11_WM_CLASS_NAME
+    ADDC(GLFW_X11_WM_CLASS_NAME)
+    ADDC(GLFW_X11_WM_CLASS_CLASS)
+#endif
     ADDC(GLFW_RELEASE);
     ADDC(GLFW_PRESS);
     ADDC(GLFW_REPEAT);

kitty/glfw.h

@@ -17,6 +17,7 @@ PyObject* glfw_wait_events(PyObject UNUSED *self, PyObject*);
 PyObject* glfw_post_empty_event(PyObject UNUSED *self);
 PyObject* glfw_get_physical_dpi(PyObject UNUSED *self);
 PyObject* glfw_get_key_name(PyObject UNUSED *self, PyObject *args);
+PyObject* glfw_init_hint_string(PyObject UNUSED *self, PyObject *args);
 
 #ifdef __APPLE__
 PyObject* cocoa_hide_titlebar(PyObject UNUSED *self, PyObject *window_id);
@@ -38,6 +39,7 @@ PyObject* cocoa_get_lang(PyObject UNUSED *self);
     {"glfw_post_empty_event", (PyCFunction)glfw_post_empty_event, METH_NOARGS, ""}, \
     {"glfw_get_physical_dpi", (PyCFunction)glfw_get_physical_dpi, METH_NOARGS, ""}, \
     {"glfw_get_key_name", (PyCFunction)glfw_get_key_name, METH_VARARGS, ""}, \
+    {"glfw_init_hint_string", (PyCFunction)glfw_init_hint_string, METH_VARARGS, ""}, \
     COCOA_HIDE_TITLEBAR \
     COCOA_GET_LANG
 

kitty/main.py

@@ -25,8 +25,12 @@ from .fast_data_types import (
     GLFW_STENCIL_BITS, Window, change_wcwidth,
     enable_automatic_opengl_error_checking, glClear, glClearColor, glewInit,
     glfw_init, glfw_set_error_callback, glfw_swap_interval, glfw_terminate,
-    glfw_wait_events, glfw_window_hint
+    glfw_wait_events, glfw_window_hint, glfw_init_hint_string
 )
+try:
+    from .fast_data_types import GLFW_X11_WM_CLASS_NAME, GLFW_X11_WM_CLASS_CLASS
+except ImportError:
+    GLFW_X11_WM_CLASS_NAME = GLFW_X11_WM_CLASS_CLASS = None
 from .layout import all_layouts
 from .shaders import GL_VERSION
 from .utils import safe_print
@@ -269,6 +273,8 @@ def main():
     change_wcwidth(not opts.use_system_wcwidth)
     glfw_set_error_callback(on_glfw_error)
     enable_automatic_opengl_error_checking(args.debug_gl)
+    if GLFW_X11_WM_CLASS_CLASS is not None:
+        glfw_init_hint_string(GLFW_X11_WM_CLASS_CLASS, opts.cls)
     if not glfw_init():
         raise SystemExit('GLFW initialization failed')
     try: