Added termkey_snprint_key() to render nice string outputs of key events

3 files changed, 49 insertions, 24 deletions

diff --git a/demo.c b/demo.c
index 4a5cb38..94b029c 100644
--- a/demo.c
+++ b/demo.c
@@ -3,36 +3,18 @@
 #include "termkey.h"
 
 int main(int argc, char *argv[]) {
+  char buffer[50];
   termkey_t *tk = termkey_new(0, 0);
 
   termkey_result ret;
   termkey_key key;
 
   while((ret = termkey_waitkey(tk, &key)) != TERMKEY_RES_EOF) {
-    switch(key.type) {
-    case TERMKEY_TYPE_KEYSYM:
-      printf("Key %s%s%s%s (code %d)\n",
-          key.modifiers & TERMKEY_KEYMOD_SHIFT ? "Shift-" : "",
-          key.modifiers & TERMKEY_KEYMOD_ALT   ? "Alt-" : "",
-          key.modifiers & TERMKEY_KEYMOD_CTRL  ? "Ctrl-" : "",
-          termkey_get_keyname(tk, key.code.sym),
-          key.code.sym);
-      break;
-    case TERMKEY_TYPE_FUNCTION:
-      printf("Function key %s%s%sF%d\n",
-          key.modifiers & TERMKEY_KEYMOD_SHIFT ? "Shift-" : "",
-          key.modifiers & TERMKEY_KEYMOD_ALT   ? "Alt-" : "",
-          key.modifiers & TERMKEY_KEYMOD_CTRL  ? "Ctrl-" : "",
-          key.code.number);
-      break;
-    case TERMKEY_TYPE_UNICODE:
-      printf("Unicode %s%s%s%s (U+%04X)\n",
-          key.modifiers & TERMKEY_KEYMOD_SHIFT ? "Shift-" : "",
-          key.modifiers & TERMKEY_KEYMOD_ALT   ? "Alt-" : "",
-          key.modifiers & TERMKEY_KEYMOD_CTRL  ? "Ctrl-" : "",
-          key.utf8,
-          key.code.codepoint);
-      break;
+    if(key.type == TERMKEY_TYPE_UNICODE && !key.modifiers)
+      printf("%s\n", key.utf8);
+    else {
+      termkey_snprint_key(tk, buffer, sizeof buffer, &key, 1);
+      printf("<%s>\n", buffer);
     }
 
     if(key.type == TERMKEY_TYPE_UNICODE && 
diff --git a/termkey.c b/termkey.c
index 9d03aea..0954ac5 100644
--- a/termkey.c
+++ b/termkey.c
@@ -855,3 +855,44 @@ termkey_keysym termkey_register_csifunc_full(termkey_t *tk, termkey_type type, t
 
   return sym;
 }
+
+size_t termkey_snprint_key(termkey_t *tk, char *buffer, size_t len, termkey_key *key, int longmod)
+{
+  size_t pos = 0;
+  size_t l;
+
+  if(key->modifiers & TERMKEY_KEYMOD_CTRL) {
+    l = snprintf(buffer + pos, len - pos, longmod ? "Ctrl-" : "C-");
+    if(l <= 0) return pos;
+    pos += l;
+  }
+
+  if(key->modifiers & TERMKEY_KEYMOD_ALT) {
+    l = snprintf(buffer + pos, len - pos, longmod ? "Alt-" : "A-");
+    if(l <= 0) return pos;
+    pos += l;
+  }
+
+  if(key->modifiers & TERMKEY_KEYMOD_SHIFT) {
+    l = snprintf(buffer + pos, len - pos, longmod ? "Shift-" : "S-");
+    if(l <= 0) return pos;
+    pos += l;
+  }
+
+  switch(key->type) {
+  case TERMKEY_TYPE_UNICODE:
+    l = snprintf(buffer + pos, len - pos, "%s", key->utf8);
+    break;
+  case TERMKEY_TYPE_KEYSYM:
+    l = snprintf(buffer + pos, len - pos, "%s", termkey_get_keyname(tk, key->code.sym));
+    break;
+  case TERMKEY_TYPE_FUNCTION:
+    l = snprintf(buffer + pos, len - pos, "F%d", key->code.number);
+    break;
+  }
+
+  if(l <= 0) return pos;
+  pos += l;
+
+  return pos;
+}
diff --git a/termkey.h b/termkey.h
index a0d26cf..5c50014 100644
--- a/termkey.h
+++ b/termkey.h
@@ -132,4 +132,6 @@ termkey_keysym termkey_register_csi_ss3_full(termkey_t *tk, termkey_type type, t
 termkey_keysym termkey_register_ss3kpalt_full(termkey_t *tk, termkey_type type, termkey_keysym sym, int modifier_set, int modifier_mask, unsigned char cmd, const char *name, char kpalt);
 termkey_keysym termkey_register_csifunc_full(termkey_t *tk, termkey_type type, termkey_keysym sym, int modifier_set, int modifier_mask, int number, const char *name);
 
+size_t termkey_snprint_key(termkey_t *tk, char *buffer, size_t len, termkey_key *key, int longmod);
+
 #endif