keygrabber: identify release events

Signed-off-by: Julien Danjou <julien@danjou.info>

event.c

@@ -547,7 +547,7 @@ event_handle_key(void *data __attribute__ ((unused)),
         lua_rawgeti(globalconf.L, LUA_REGISTRYINDEX, globalconf.keygrabber);
         if(keygrabber_handlekpress(globalconf.L, ev))
         {
-            if(lua_pcall(globalconf.L, 2, 1, 0))
+            if(lua_pcall(globalconf.L, 3, 1, 0))
             {
                 warn("error running function: %s", lua_tostring(globalconf.L, -1));
                 luaA_keygrabber_stop(globalconf.L);

keygrabber.c

@@ -680,14 +680,25 @@ keygrabber_handlekpress(lua_State *L, xcb_key_press_event_t *e)
 
     lua_pushstring(L, buf);
 
+    switch(e->response_type)
+    {
+      case XCB_KEY_PRESS:
+        lua_pushliteral(L, "press");
+        break;
+      case XCB_KEY_RELEASE:
+        lua_pushliteral(L, "release");
+        break;
+    }
+
     return true;
 }
 
 /** Grab keyboard and read pressed keys, calling callback function at each key
  * pressed. The callback function must return a boolean value: true to
  * continue grabbing, false to stop.
- * The function is called with 2 arguments:
+ * The function is called with 3 arguments:
- * a table containing modifiers keys and a string, the key pressed.
+ * a table containing modifiers keys, a string with the key pressed and a
+ * string with eithe "press" or "release" to indicate the event type.
  *
  * \param L The Lua VM state.
  * \return The number of elements pushed on stack.

lib/awful/prompt.lua.in

@@ -159,7 +159,8 @@ function run(args, textbox, exe_callback, completion_callback, history_path, his
     end
     textbox.text = prettyprompt .. prompt_text_with_cursor(text, inv_col, cur_col, cur_pos, cur_ul, args.selectall)
     capi.keygrabber.run(
-    function (mod, key)
+    function (mod, key, event)
+        if event ~= "press" then return true end
         -- Get out cases
         if (mod.Control and (key == "c" or key == "g"))
             or (not mod.Control and key == "Escape") then

lib/invaders.lua.in

@@ -285,7 +285,8 @@ function enemies.handle ()
     end
 end
 
-function keyhandler(mod, key)
+function keyhandler(mod, key, event)
+    if event ~= "press" then return true end
     if gamedata.highscore.getkeys then
         if key:len() == 1 and gamedata.name:len() < 20 then
             gamedata.name = gamedata.name .. key

lib/revelation.lua.in

@@ -76,7 +76,8 @@ end
 -- Arrow keys move focus, Return selects, Escape cancels.
 -- Ignores modifiers.
 function keyboardhandler (restore)
-    return function (mod, key)
+    return function (mod, key, event)
+                if event ~= "press" then return true end
                 if key == "Escape" then
                     restore()
                     awful.tag.history.restore()