Add support for iso14755

We launch dmenu for getting a codepoint, then convert it and send it to
the terminal.

2 files changed, 29 insertions, 0 deletions

diff --git a/config.def.h b/config.def.h
index b41747f..c2e4ffd 100644
--- a/config.def.h
+++ b/config.def.h
@@ -172,6 +172,7 @@ static Shortcut shortcuts[] = {
         { MODKEY|ShiftMask,     XK_C,           clipcopy,       {.i =  0} },
         { MODKEY|ShiftMask,     XK_V,           clippaste,      {.i =  0} },
         { MODKEY,               XK_Num_Lock,    numlock,        {.i =  0} },
+        { MODKEY,               XK_Control_L,   iso14755,       {.i =  0} },
 };
 
 /*
diff --git a/st.c b/st.c
index 6c16386..c67623f 100644
--- a/st.c
+++ b/st.c
@@ -66,6 +66,7 @@ char *argv0;
 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
 #define MAX(a, b)               ((a) < (b) ? (b) : (a))
 #define LEN(a)                  (sizeof(a) / sizeof(a)[0])
+#define NUMMAXLEN(x)            ((int)(sizeof(x) * 2.56 + 0.5) + 1)
 #define DEFAULT(a, b)           (a) = (a) ? (a) : (b)
 #define BETWEEN(x, a, b)        ((a) <= (x) && (x) <= (b))
 #define DIVCEIL(n, d)           (((n) + ((d) - 1)) / (d))
@@ -87,6 +88,8 @@ char *argv0;
 #define TRUEGREEN(x)            (((x) & 0xff00))
 #define TRUEBLUE(x)             (((x) & 0xff) << 8)
 
+/* constants */
+#define ISO14755CMD             "dmenu -w %lu -p codepoint: </dev/null"
 
 enum glyph_attribute {
         ATTR_NULL       = 0,
@@ -338,6 +341,7 @@ static void xzoomabs(const Arg *);
 static void xzoomreset(const Arg *);
 static void printsel(const Arg *);
 static void printscreen(const Arg *) ;
+static void iso14755(const Arg *);
 static void toggleprinter(const Arg *);
 static void sendbreak(const Arg *);
 
@@ -2633,6 +2637,30 @@ tprinter(char *s, size_t len)
 }
 
 void
+iso14755(const Arg *arg)
+{
+        char cmd[sizeof(ISO14755CMD) + NUMMAXLEN(xw.win)];
+        FILE *p;
+        char *us, *e, codepoint[9], uc[UTF_SIZ];
+        unsigned long utf32;
+
+        snprintf(cmd, sizeof(cmd), ISO14755CMD, xw.win);
+        if (!(p = popen(cmd, "r")))
+                return;
+
+        us = fgets(codepoint, sizeof(codepoint), p);
+        pclose(p);
+
+        if (!us || *us == '\0' || *us == '-' || strlen(us) > 7)
+                return;
+        if ((utf32 = strtoul(us, &e, 16)) == ULONG_MAX ||
+            (*e != '\n' && *e != '\0'))
+                return;
+
+        ttysend(uc, utf8encode(utf32, uc));
+}
+
+void
 toggleprinter(const Arg *arg)
 {
         term.mode ^= MODE_PRINT;