[input] Get bindings actually working

The mouse bound to movement axes works (though signs are all over the
place, so movement direction is a little off), and binding F10 (key 68)
to quit works :)

include/QF/input/binding.h

@@ -234,6 +234,7 @@ int IN_RegisterAxis (in_axis_t *axis);
 in_button_t *IN_FindButton (const char *name);
 in_axis_t *IN_FindAxis (const char *name);
 
+void IN_Binding_Activate (void);
 void IN_Binding_Init (void);
 
 #endif

libs/input/in_binding.c

@@ -160,7 +160,7 @@ in_binding_axis (const IE_event_t *ie_event)
 
 	if (db && axis < db->num_axes) {
 		db->axis_info[axis].value = value;
-		if (db->axis_imt_id) {
+		if (db->axis_imt_id >= 0) {
 			IMT_ProcessAxis (db->axis_imt_id + axis, value);
 		}
 	}
@@ -175,7 +175,7 @@ in_binding_button (const IE_event_t *ie_event)
 
 	if (db && button < db->num_buttons) {
 		db->button_info[button].state = state;
-		if (db->button_imt_id) {
+		if (db->button_imt_id >= 0) {
 			IMT_ProcessButton (db->button_imt_id + button, state);
 		}
 	}
@@ -346,7 +346,7 @@ in_bind_f (void)
 		};
 		exprtab_t   vars_tab = { var_syms, 0 };
 		exprctx_t   exprctx = {
-			.external_variables = &vars_tab,
+			.symtab = &vars_tab,
 			.memsuper = new_memsuper (),
 			.messages = PL_NewArray (),
 		};
@@ -355,9 +355,12 @@ in_bind_f (void)
 		int     i;
 		for (i = 6; i < argc; i++) {
 			const char *arg = Cmd_Argv (i);
-			if (!cexpr_eval_string (arg, &exprctx)) {
-				PL_Message (exprctx.messages, 0, "error parsing recipe: %s",
-							arg);
+			if (cexpr_eval_string (arg, &exprctx)) {
+				plitem_t   *messages = exprctx.messages;
+				for (int j = 0; j < PL_A_NumObjects (messages); j++) {
+					Sys_Printf ("%s\n",
+								PL_String (PL_ObjectAtIndex (messages, j)));
+				}
 				break;
 			}
 		}
@@ -376,7 +379,7 @@ in_bind_f (void)
 			return;
 		}
 		if (dev->button_imt_id == -1) {
-			dev->button_imt_id = IMT_GetAxisBlock (dev->num_buttons);
+			dev->button_imt_id = IMT_GetButtonBlock (dev->num_buttons);
 		}
 		IMT_BindButton (imt, dev->button_imt_id + num, binding);
 	}
@@ -686,6 +689,12 @@ static bindcmd_t in_binding_commands[] = {
 #endif
 };
 
+void
+IN_Binding_Activate (void)
+{
+	IE_Set_Focus (in_binding_handler);
+}
+
 void
 IN_Binding_Init (void)
 {

libs/input/in_imt.c

@@ -353,6 +353,7 @@ IMT_BindAxis (imt_t *imt, int axis_num, in_axis_t *axis,
 			*(a->recipe = alloc_recipe ()) = *recipe;
 			Hash_AddElement (recipe_tab, a->recipe);
 		}
+		a->axis = axis;
 	}
 }
 
@@ -392,9 +393,9 @@ IMT_ProcessAxis (int axis, int value)
 			int         deadzone = recipe->deadzone;
 			int         minval = recipe->min + recipe->minzone;
 			int         maxval = recipe->max - recipe->maxzone;
-			int         input  = bound (minval, value, maxval);
 			float       output;
 			if (relative) {
+				int         input = value;
 				if (deadzone > 0) {
 					if (input > deadzone) {
 						input -= deadzone;
@@ -409,6 +410,7 @@ IMT_ProcessAxis (int axis, int value)
 					output = powf (output, recipe->curve);
 				}
 			} else {
+				int         input = bound (minval, value, maxval);
 				int         range = maxval - minval;
 				int         zero = minval;
 				if (recipe->deadzone >= 0) {
@@ -623,6 +625,7 @@ static imtcmd_t imt_commands[] = {
 	{	"imt_drop_all", imt_drop_all_f,
 		"delete all imt tables\n"
 	},
+	{},
 };
 
 void

qw/include/cl_input.h

@@ -32,6 +32,7 @@
 
 #include "qw/protocol.h"
 
+void CL_Input_Activate (void);
 void CL_Input_Init (void);
 void CL_Input_Init_Cvars (void);
 void CL_ClearStates (void);

qw/source/cl_input.c

@@ -580,6 +580,13 @@ CL_Input_Init (void)
 						"Call a game function or QuakeC function.");
 }
 
+void
+CL_Input_Activate (void)
+{
+	IMT_SetContext (cl_game_context);
+	IN_Binding_Activate ();
+}
+
 void
 CL_Input_Init_Cvars (void)
 {

qw/source/cl_main.c

@@ -1162,6 +1162,9 @@ CL_SetState (cactive_t state)
 		}
 	}
 	Con_SetState (state == ca_active ? con_inactive : con_fullscreen);
+	if (state != old_state && state == ca_active) {
+		CL_Input_Activate ();
+	}
 }
 
 void