Allow usage of strings as key names for root.fake_input

Signed-off-by: Uli Schlachter <psychon@znc.in>

root.c

@@ -19,6 +19,8 @@
  *
  */
 
+#include <X11/keysym.h>
+#include <X11/XF86keysym.h>
 #include <xcb/xtest.h>
 
 #include "globalconf.h"
@@ -29,6 +31,23 @@
 #include "common/xcursor.h"
 #include "common/xutil.h"
 
+static xcb_keycode_t
+_string_to_key_code(const char *s)
+{
+    xcb_keysym_t keysym;
+    xcb_keycode_t *keycodes;
+
+    keysym   = XStringToKeysym(s);
+    keycodes = xcb_key_symbols_get_keycode(globalconf.keysyms, keysym);
+
+    if(keycodes) {
+        return keycodes[0]; /* XXX only returning the first is probably not
+                             * the best */
+    } else {
+        return 0;
+    }
+}
+
 /** Send fake events. Usually the current focused client will get it.
  * \param L The Lua VM state.
  * \return The number of element pushed on stack.
@@ -58,13 +77,21 @@ luaA_root_fake_input(lua_State *L)
     if (A_STREQ(stype, "key_press"))
     {
         type = XCB_KEY_PRESS;
+        if(lua_type(L, 2) == LUA_TSTRING) {
+            detail = _string_to_key_code(lua_tostring(L, 2)); /* keysym */
+        } else {
             detail = luaL_checknumber(L, 2); /* keycode */
         }
+    }
     else if(A_STREQ(stype, "key_release"))
     {
         type = XCB_KEY_RELEASE;
+        if(lua_type(L, 2) == LUA_TSTRING) {
+            detail = _string_to_key_code(lua_tostring(L, 2)); /* keysym */
+        } else {
             detail = luaL_checknumber(L, 2); /* keycode */
         }
+    }
     else if(A_STREQ(stype, "button_press"))
     {
         type = XCB_BUTTON_PRESS;