fix: preserve emoji commits through XIM

xim/ximtext.c

@@ -0,0 +1,28 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <xcb-imdkit/encoding.h>
+#include "ximtext.h"
+
+char*
+ximcompound(const char *s, size_t len, size_t *outlen)
+{
+	static const char utf8[] = "\033%G";
+	char *ct;
+
+	if(s == NULL || len > SIZE_MAX - sizeof utf8)
+		return NULL;
+	ct = xcb_utf8_to_compound_text(s, len, outlen);
+	if(ct != NULL)
+		return ct;
+	/* X11 Compound Text reserves ESC % G for an embedded UTF-8 run. */
+	ct = malloc(len + sizeof utf8);
+	if(ct == NULL)
+		return NULL;
+	memcpy(ct, utf8, sizeof utf8 - 1);
+	memcpy(ct + sizeof utf8 - 1, s, len);
+	ct[len + sizeof utf8 - 1] = '\0';
+	if(outlen != NULL)
+		*outlen = len + sizeof utf8 - 1;
+	return ct;
+}