Better mod key logic in input and mouse motion check.

src/input.c

@@ -28,14 +28,22 @@ input_init(Input *input)
 	input->lastMouseButtonState = 0;
 	input->mouseX = 0;
 	input->mouseY = 0;
+	input->lastMouseX = 0;
+	input->lastMouseY = 0;
+	input->modKeyState = 0;
+	input->lastModKeyState = 0;
 }
 
 void input_reset(Input *input)
 {
 	input->lastKeyState = input->keyState;
 	input->lastMouseButtonState = input->mouseButtonState;
+	input->lastModKeyState = input->modKeyState;
 	input->keyState = 0;
 	input->mouseButtonState = 0;
+	input->modKeyState = 0;
+	input->lastMouseX = input->mouseX;
+	input->lastMouseY = input->mouseY;
 }
 
 static Uint64
@@ -48,9 +56,8 @@ get_event_key(SDL_Event *event)
 			return KEY_UP;
 		case SDLK_DOWN:
 		case SDLK_j:
-			return KEY_DOWN;
 		case SDLK_s:
-			return KEY_DOWN | KEY_S;
+			return KEY_DOWN;
 		case SDLK_LEFT:
 		case SDLK_h:
 		case SDLK_a:
@@ -83,19 +90,27 @@ get_event_key(SDL_Event *event)
 			return KEY_ESC;
 		case SDLK_RETURN:
 			return KEY_ENTER;
-		case SDLK_LALT:
-		case SDLK_RALT:
-			return KEY_ALT;
-		case SDLK_LCTRL:
-		case SDLK_RCTRL:
-			return KEY_CTRL;
-		case SDLK_m:
-			return KEY_M;
 		default:
 			return 0;
 	}
 }
 
+static Uint32
+get_event_modkey(SDL_Event *event)
+{
+	if (event->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
+		switch (event->key.keysym.sym) {
+			case SDLK_s:
+				return KEY_CTRL_S;
+			case SDLK_m:
+				return KEY_CTRL_M;
+			default:
+				return 0;
+		}
+	}
+	return 0;
+}
+
 static Uint32
 get_event_mousebutton(SDL_Event *event)
 {
@@ -114,10 +129,20 @@ get_event_mousebutton(SDL_Event *event)
 void
 input_handle_event(Input *input, SDL_Event *event)
 {
-	if (event->type == SDL_KEYDOWN)
-		input->keyState |= get_event_key(event);
-	else if (event->type == SDL_KEYUP) 
-		input->keyState &= ~get_event_key(event);
+	if (event->type == SDL_KEYDOWN) {
+		Uint32 key;
+		if ((key = get_event_modkey(event)))
+			input->modKeyState |= key;
+		else
+			input->keyState |= get_event_key(event);
+	}
+	else if (event->type == SDL_KEYUP) {
+		Uint32 key;
+		if ((key = get_event_modkey(event)))
+			input->modKeyState &= ~key;
+		else
+			input->keyState &= ~get_event_key(event);
+	}
 	else if (event->type == SDL_MOUSEBUTTONDOWN)
 		input->mouseButtonState |= get_event_mousebutton(event);
 	else if (event->type == SDL_MOUSEBUTTONUP)
@@ -134,6 +159,13 @@ input_key_is_pressed(Input *input, Uint64 key)
 	return (input->keyState & key) && !(input->lastKeyState & key);
 }
 
+bool
+input_modkey_is_pressed(Input *input, Uint32 key)
+{
+	return (input->modKeyState & key)
+		&& !(input->lastModKeyState & key);
+}
+
 bool
 input_key_is_released(Input *input, Uint64 key)
 {
@@ -152,3 +184,10 @@ input_mousebutton_is_pressed(Input *input, Uint8 button)
 	return (input->mouseButtonState & button)
 		&& !(input->lastMouseButtonState & button);
 }
+
+bool
+input_mouse_moved(Input *input)
+{
+	return (input->mouseX != input->lastMouseX)
+		|| (input->mouseY != input->lastMouseY);
+}

src/input.h

@@ -38,10 +38,9 @@
 #define KEY_NUM9	8192
 #define KEY_ESC		16384
 #define KEY_ENTER	32768
-#define KEY_CTRL	65536
-#define KEY_ALT		131072
-#define KEY_M		262144
-#define KEY_S		524288
+
+#define KEY_CTRL_M		1
+#define KEY_CTRL_S		2
 
 #define MBUTTON_LEFT	1
 #define MBUTTON_MIDDLE	2
@@ -52,6 +51,10 @@ typedef struct Input {
 	Uint64 lastKeyState;
 	Uint32 mouseButtonState;
 	Uint32 lastMouseButtonState;
+	Uint32 modKeyState;
+	Uint32 lastModKeyState;
+	Uint32 lastMouseX;
+	Uint32 lastMouseY;
 	Uint32 mouseX;
 	Uint32 mouseY;
 } Input;
@@ -74,8 +77,14 @@ input_key_is_released(Input *, Uint64 key);
 bool
 input_key_is_down(Input *, Uint64 key);
 
+bool
+input_modkey_is_pressed(Input *, Uint32 key);
+
 bool
 input_mousebutton_is_pressed(Input *, Uint8 button);
 
+bool
+input_mouse_moved(Input*);
+
 #endif // INPUT_H_
 

src/main.c

@@ -373,8 +373,7 @@ handle_main_input(void)
 		}
 	}
 
-	if (input_key_is_down(&input, KEY_CTRL)
-	    && input_key_is_pressed(&input, SDLK_m)) {
+	if (input_modkey_is_pressed(&input, KEY_CTRL_M)) {
 		if (mixer_toggle_music(&gGameState))
 			gui_log("Music enabled");
 		else
@@ -382,8 +381,7 @@ handle_main_input(void)
 		return true;
 	}
 
-	if (input_key_is_down(&input, KEY_CTRL)
-	    && input_key_is_pressed(&input, SDLK_s)) {
+	if (input_modkey_is_pressed(&input, KEY_CTRL_S)) {
 		if (mixer_toggle_sound())
 			gui_log("Sound enabled");
 		else

test/test_input.c

@@ -109,6 +109,27 @@ test_mousebuttons(void **state)
 	assert_true(input_mousebutton_is_pressed(&input, MBUTTON_RIGHT));
 }
 
+static void
+test_mouse_moved(void **state)
+{
+	(void) state;
+
+	Input input;
+	input_init(&input);
+
+	input.mouseX = 30;
+	input.mouseY = 30;
+	input.lastMouseX = 30;
+	input.lastMouseY = 30;
+
+	assert_true(!input_mouse_moved(&input));
+
+	input.lastMouseX += 30;
+	input.lastMouseY += 30;
+
+	assert_true(input_mouse_moved(&input));
+}
+
 int main(int argc, char *argv[])
 {
 	(void) argc;
@@ -120,6 +141,7 @@ int main(int argc, char *argv[])
 		cmocka_unit_test(test_keydown),
 		cmocka_unit_test(test_event_parse),
 		cmocka_unit_test(test_mousebuttons),
+		cmocka_unit_test(test_mouse_moved),
 	};
 
 	return cmocka_run_group_tests(tests, NULL, NULL);