Support the decorations field from the _MOTIF_WM_HINTS prop (Attempt y…

…shui#2 using just a type and comparing the 2nd index)

src/atom.h

@@ -46,6 +46,7 @@
 	_NET_WM_STATE, \
 	_NET_WM_STATE_FULLSCREEN, \
 	_NET_WM_BYPASS_COMPOSITOR, \
+	_MOTIF_WM_HINTS, \
 	UTF8_STRING, \
 	C_STRING
 // clang-format on

src/c2.c

@@ -136,6 +136,7 @@ struct _c2_l {
 		C2_L_TWINDOW,
 		C2_L_TATOM,
 		C2_L_TDRAWABLE,
+                C2_L_TMOTIFHINTS,
 	} type;
 	int format;
 	enum {
@@ -1334,6 +1335,7 @@ static xcb_atom_t c2_get_atom_type(const c2_l_t *pleaf) {
 	case C2_L_TSTRING: return XCB_ATOM_STRING;
 	case C2_L_TATOM: return XCB_ATOM_ATOM;
 	case C2_L_TDRAWABLE: return XCB_ATOM_DRAWABLE;
+	case C2_L_TMOTIFHINTS: return XCB_ATOM_CARDINAL;
 	default: assert(0); break;
 	}
 	unreachable();

tests/testcases/wm_motif_hints.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+
+import xcffib.xproto as xproto
+import xcffib
+import time
+from common import set_window_name, to_atom
+import struct
+
+def set_MOTIF_WM_HINTS(conn, wid, hints):
+    struct.pack('LLLLL',*hints)
+    prop_name = to_atom(conn, "_MOTIF_WM_HINTS")
+    str_type = to_atom(conn, "_MOTIF_WM_HINTS")
+    conn.core.ChangePropertyChecked(xproto.PropMode.Replace, wid, prop_name, str_type, 32, len(hints), hints).check()
+
+
+conn = xcffib.connect()
+setup = conn.get_setup()
+root = setup.roots[0].root
+visual = setup.roots[0].root_visual
+depth = setup.roots[0].root_depth
+
+# making sure disabling shadow while screen is unredirected doesn't cause assertion failure
+wid = conn.generate_id()
+
+# Create a window
+conn.core.CreateWindowChecked(depth, wid, root, 0, 0, 100, 100, 0, xproto.WindowClass.InputOutput, visual, 0, []).check()
+
+# Set Window name
+set_window_name(conn, wid, "WM MOTIF HINTS TEST")
+
+# Set WM MOTIF HINTS
+set_MOTIF_WM_HINTS(conn, wid, (2, 1, 0, 0, 0))
+
+# Map the window
+conn.core.MapWindowChecked(wid).check()
+
+# Idle loop
+
+try:
+    while True:
+        # Running
+        time.sleep(0.1)
+except KeyboardInterrupt:
+    pass
+
+# Destroy the window
+conn.core.DestroyWindowChecked(wid).check()