fix: repair XIM context lifecycle

xim/keymap.c

@@ -0,0 +1,37 @@
+#include <xkbcommon/xkbcommon.h>
+#include "keymap.h"
+
+enum
+{
+	ShiftMask = 1<<0,
+	LockMask = 1<<1,
+	GroupShift = 13,
+	GroupMask = 3,
+};
+
+uint32_t
+keymaplookup(const uint32_t *syms, int nsyms, uint16_t state)
+{
+	uint32_t lo, hi, lower, upper;
+	int col, group, shift;
+
+	if(syms == NULL || nsyms <= 0)
+		return XKB_KEY_NoSymbol;
+	group = (state >> GroupShift) & GroupMask;
+	col = group * 2;
+	if(col >= nsyms || syms[col] == XKB_KEY_NoSymbol)
+		col = 0;
+	lo = syms[col];
+	if(lo == XKB_KEY_NoSymbol)
+		return XKB_KEY_NoSymbol;
+	hi = col + 1 < nsyms ? syms[col + 1] : XKB_KEY_NoSymbol;
+	lower = xkb_keysym_to_lower(lo);
+	upper = xkb_keysym_to_upper(lo);
+	if(hi == XKB_KEY_NoSymbol)
+		hi = lower != upper ? upper : lo;
+	shift = (state & ShiftMask) != 0;
+	/* Lock reverses Shift only for keys with an alphabetic case pair. */
+	if((state & LockMask) && lower != upper)
+		shift = !shift;
+	return shift ? hi : lo;
+}