Allow checking for exact matches with Action events.

Added additional param to action related methods to test for exactness.
If "p_exact_match" is true, then the action will only be "matched" if the provided input event *exactly* matches with the action event.

Before:
* Action Event = KEY_S
* Input Event = KEY_CONTROL + KEY_S
* Is Action Pressed = True

Now:
You can still do the above, however you can optionally check that the input is exactly what the action event is:
* Action Event = KEY_S
* Input Event = KEY_CONTROL + KEY_S
* p_exact_match = True
* Is Action Pressed = False
* If the Input Event was only KEY_S, then the result would be true.

Usage:

```gdscript
Input.is_action_pressed(action_name: String, exact_match: bool)
Input.is_action_pressed("my_action", true)

InputMap.event_is_action(p_event, "my_action", true)

func _input(event: InputEvent):
  event.is_action_pressed("my_action", false, true) # false = "allow_echo", true = "exact_match"
  event.is_action("my_action", true)
```

6 files changed, 70 insertions, 50 deletions

diff --git a/core/input/input.cpp b/core/input/input.cpp
index 153656e44a..cf41471f3a 100644
--- a/core/input/input.cpp
+++ b/core/input/input.cpp
@@ -91,11 +91,11 @@ void Input::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_key_pressed", "keycode"), &Input::is_key_pressed);
 	ClassDB::bind_method(D_METHOD("is_mouse_button_pressed", "button"), &Input::is_mouse_button_pressed);
 	ClassDB::bind_method(D_METHOD("is_joy_button_pressed", "device", "button"), &Input::is_joy_button_pressed);
-	ClassDB::bind_method(D_METHOD("is_action_pressed", "action"), &Input::is_action_pressed);
-	ClassDB::bind_method(D_METHOD("is_action_just_pressed", "action"), &Input::is_action_just_pressed);
-	ClassDB::bind_method(D_METHOD("is_action_just_released", "action"), &Input::is_action_just_released);
-	ClassDB::bind_method(D_METHOD("get_action_strength", "action"), &Input::get_action_strength);
-	ClassDB::bind_method(D_METHOD("get_action_raw_strength", "action"), &Input::get_action_strength);
+	ClassDB::bind_method(D_METHOD("is_action_pressed", "action", "exact"), &Input::is_action_pressed, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("is_action_just_pressed", "action", "exact"), &Input::is_action_just_pressed, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("is_action_just_released", "action", "exact"), &Input::is_action_just_released, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("get_action_strength", "action", "exact"), &Input::get_action_strength, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("get_action_raw_strength", "action", "exact"), &Input::get_action_strength, DEFVAL(false));
 	ClassDB::bind_method(D_METHOD("get_axis", "negative_action", "positive_action"), &Input::get_axis);
 	ClassDB::bind_method(D_METHOD("get_vector", "negative_x", "positive_x", "negative_y", "positive_y", "deadzone"), &Input::get_vector, DEFVAL(-1.0f));
 	ClassDB::bind_method(D_METHOD("add_joy_mapping", "mapping", "update_existing"), &Input::add_joy_mapping, DEFVAL(false));
@@ -234,16 +234,20 @@ bool Input::is_joy_button_pressed(int p_device, int p_button) const {
 	return joy_buttons_pressed.has(_combine_device(p_button, p_device));
 }
 
-bool Input::is_action_pressed(const StringName &p_action) const {
-	return action_state.has(p_action) && action_state[p_action].pressed;
+bool Input::is_action_pressed(const StringName &p_action, bool p_exact) const {
+	return action_state.has(p_action) && action_state[p_action].pressed && (p_exact ? action_state[p_action].exact : true);
 }
 
-bool Input::is_action_just_pressed(const StringName &p_action) const {
+bool Input::is_action_just_pressed(const StringName &p_action, bool p_exact) const {
 	const Map<StringName, Action>::Element *E = action_state.find(p_action);
 	if (!E) {
 		return false;
 	}
 
+	if (p_exact && E->get().exact == false) {
+		return false;
+	}
+
 	if (Engine::get_singleton()->is_in_physics_frame()) {
 		return E->get().pressed && E->get().physics_frame == Engine::get_singleton()->get_physics_frames();
 	} else {
@@ -251,12 +255,16 @@ bool Input::is_action_just_pressed(const StringName &p_action) const {
 	}
 }
 
-bool Input::is_action_just_released(const StringName &p_action) const {
+bool Input::is_action_just_released(const StringName &p_action, bool p_exact) const {
 	const Map<StringName, Action>::Element *E = action_state.find(p_action);
 	if (!E) {
 		return false;
 	}
 
+	if (p_exact && E->get().exact == false) {
+		return false;
+	}
+
 	if (Engine::get_singleton()->is_in_physics_frame()) {
 		return !E->get().pressed && E->get().physics_frame == Engine::get_singleton()->get_physics_frames();
 	} else {
@@ -264,21 +272,29 @@ bool Input::is_action_just_released(const StringName &p_action) const {
 	}
 }
 
-float Input::get_action_strength(const StringName &p_action) const {
+float Input::get_action_strength(const StringName &p_action, bool p_exact) const {
 	const Map<StringName, Action>::Element *E = action_state.find(p_action);
 	if (!E) {
 		return 0.0f;
 	}
 
+	if (p_exact && E->get().exact == false) {
+		return 0.0f;
+	}
+
 	return E->get().strength;
 }
 
-float Input::get_action_raw_strength(const StringName &p_action) const {
+float Input::get_action_raw_strength(const StringName &p_action, bool p_exact) const {
 	const Map<StringName, Action>::Element *E = action_state.find(p_action);
 	if (!E) {
 		return 0.0f;
 	}
 
+	if (p_exact && E->get().exact == false) {
+		return 0.0f;
+	}
+
 	return E->get().raw_strength;
 }
 
@@ -584,14 +600,15 @@ void Input::_parse_input_event_impl(const Ref<InputEvent> &p_event, bool p_is_em
 
 	for (const Map<StringName, InputMap::Action>::Element *E = InputMap::get_singleton()->get_action_map().front(); E; E = E->next()) {
 		if (InputMap::get_singleton()->event_is_action(p_event, E->key())) {
-			// Save the action's state
-			if (!p_event->is_echo() && is_action_pressed(E->key()) != p_event->is_action_pressed(E->key())) {
+			// If not echo and action pressed state has changed
+			if (!p_event->is_echo() && is_action_pressed(E->key(), false) != p_event->is_action_pressed(E->key())) {
 				Action action;
 				action.physics_frame = Engine::get_singleton()->get_physics_frames();
 				action.idle_frame = Engine::get_singleton()->get_idle_frames();
 				action.pressed = p_event->is_action_pressed(E->key());
 				action.strength = 0.0f;
 				action.raw_strength = 0.0f;
+				action.exact = InputMap::get_singleton()->event_is_action(p_event, E->key(), true);
 				action_state[E->key()] = action;
 			}
 			action_state[E->key()].strength = p_event->get_action_strength(E->key());
diff --git a/core/input/input.h b/core/input/input.h
index 1b2df49ac0..318f505dc4 100644
--- a/core/input/input.h
+++ b/core/input/input.h
@@ -116,6 +116,7 @@ private:
 		uint64_t physics_frame;
 		uint64_t idle_frame;
 		bool pressed;
+		bool exact;
 		float strength;
 		float raw_strength;
 	};
@@ -261,11 +262,11 @@ public:
 	bool is_key_pressed(int p_keycode) const;
 	bool is_mouse_button_pressed(int p_button) const;
 	bool is_joy_button_pressed(int p_device, int p_button) const;
-	bool is_action_pressed(const StringName &p_action) const;
-	bool is_action_just_pressed(const StringName &p_action) const;
-	bool is_action_just_released(const StringName &p_action) const;
-	float get_action_strength(const StringName &p_action) const;
-	float get_action_raw_strength(const StringName &p_action) const;
+	bool is_action_pressed(const StringName &p_action, bool p_exact = false) const;
+	bool is_action_just_pressed(const StringName &p_action, bool p_exact = false) const;
+	bool is_action_just_released(const StringName &p_action, bool p_exact = false) const;
+	float get_action_strength(const StringName &p_action, bool p_exact = false) const;
+	float get_action_raw_strength(const StringName &p_action, bool p_exact = false) const;
 
 	float get_axis(const StringName &p_negative_action, const StringName &p_positive_action) const;
 	Vector2 get_vector(const StringName &p_negative_x, const StringName &p_positive_x, const StringName &p_negative_y, const StringName &p_positive_y, float p_deadzone = -1.0f) const;
diff --git a/core/input/input_event.cpp b/core/input/input_event.cpp
index e04e642f6b..d9ac31f3fb 100644
--- a/core/input/input_event.cpp
+++ b/core/input/input_event.cpp
@@ -44,31 +44,31 @@ int InputEvent::get_device() const {
 	return device;
 }
 
-bool InputEvent::is_action(const StringName &p_action) const {
-	return InputMap::get_singleton()->event_is_action(Ref<InputEvent>((InputEvent *)this), p_action);
+bool InputEvent::is_action(const StringName &p_action, bool p_exact_match) const {
+	return InputMap::get_singleton()->event_is_action(Ref<InputEvent>((InputEvent *)this), p_action, p_exact_match);
 }
 
-bool InputEvent::is_action_pressed(const StringName &p_action, bool p_allow_echo) const {
+bool InputEvent::is_action_pressed(const StringName &p_action, bool p_allow_echo, bool p_exact_match) const {
 	bool pressed;
-	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, &pressed);
+	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, p_exact_match, &pressed, nullptr, nullptr);
 	return valid && pressed && (p_allow_echo || !is_echo());
 }
 
-bool InputEvent::is_action_released(const StringName &p_action) const {
+bool InputEvent::is_action_released(const StringName &p_action, bool p_exact_match) const {
 	bool pressed;
-	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, &pressed);
+	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, p_exact_match, &pressed, nullptr, nullptr);
 	return valid && !pressed;
 }
 
-float InputEvent::get_action_strength(const StringName &p_action) const {
+float InputEvent::get_action_strength(const StringName &p_action, bool p_exact_match) const {
 	float strength;
-	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, nullptr, &strength);
+	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, p_exact_match, nullptr, &strength, nullptr);
 	return valid ? strength : 0.0f;
 }
 
-float InputEvent::get_action_raw_strength(const StringName &p_action) const {
+float InputEvent::get_action_raw_strength(const StringName &p_action, bool p_exact_match) const {
 	float raw_strength;
-	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, nullptr, nullptr, &raw_strength);
+	bool valid = InputMap::get_singleton()->event_get_action_status(Ref<InputEvent>((InputEvent *)this), p_action, p_exact_match, nullptr, nullptr, &raw_strength);
 	return valid ? raw_strength : 0.0f;
 }
 
@@ -100,10 +100,10 @@ void InputEvent::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_device", "device"), &InputEvent::set_device);
 	ClassDB::bind_method(D_METHOD("get_device"), &InputEvent::get_device);
 
-	ClassDB::bind_method(D_METHOD("is_action", "action"), &InputEvent::is_action);
-	ClassDB::bind_method(D_METHOD("is_action_pressed", "action", "allow_echo"), &InputEvent::is_action_pressed, DEFVAL(false));
-	ClassDB::bind_method(D_METHOD("is_action_released", "action"), &InputEvent::is_action_released);
-	ClassDB::bind_method(D_METHOD("get_action_strength", "action"), &InputEvent::get_action_strength);
+	ClassDB::bind_method(D_METHOD("is_action", "action", "exact_match"), &InputEvent::is_action, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("is_action_pressed", "action", "allow_echo", "exact_match"), &InputEvent::is_action_pressed, DEFVAL(false), DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("is_action_released", "action", "exact_match"), &InputEvent::is_action_released, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("get_action_strength", "action", "exact_match"), &InputEvent::get_action_strength, DEFVAL(false));
 
 	ClassDB::bind_method(D_METHOD("is_pressed"), &InputEvent::is_pressed);
 	ClassDB::bind_method(D_METHOD("is_echo"), &InputEvent::is_echo);
diff --git a/core/input/input_event.h b/core/input/input_event.h
index 6a71a24c8b..d70883fcf7 100644
--- a/core/input/input_event.h
+++ b/core/input/input_event.h
@@ -122,11 +122,11 @@ public:
 	void set_device(int p_device);
 	int get_device() const;
 
-	bool is_action(const StringName &p_action) const;
-	bool is_action_pressed(const StringName &p_action, bool p_allow_echo = false) const;
-	bool is_action_released(const StringName &p_action) const;
-	float get_action_strength(const StringName &p_action) const;
-	float get_action_raw_strength(const StringName &p_action) const;
+	bool is_action(const StringName &p_action, bool p_exact_match = false) const;
+	bool is_action_pressed(const StringName &p_action, bool p_allow_echo = false, bool p_exact_match = false) const;
+	bool is_action_released(const StringName &p_action, bool p_exact_match = false) const;
+	float get_action_strength(const StringName &p_action, bool p_exact_match = false) const;
+	float get_action_raw_strength(const StringName &p_action, bool p_exact_match = false) const;
 
 	// To be removed someday, since they do not make sense for all events
 	virtual bool is_pressed() const;
diff --git a/core/input/input_map.cpp b/core/input/input_map.cpp
index 979809c7af..f3c2e2eb9a 100644
--- a/core/input/input_map.cpp
+++ b/core/input/input_map.cpp
@@ -50,7 +50,7 @@ void InputMap::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("action_erase_event", "action", "event"), &InputMap::action_erase_event);
 	ClassDB::bind_method(D_METHOD("action_erase_events", "action"), &InputMap::action_erase_events);
 	ClassDB::bind_method(D_METHOD("action_get_events", "action"), &InputMap::_action_get_events);
-	ClassDB::bind_method(D_METHOD("event_is_action", "event", "action"), &InputMap::event_is_action);
+	ClassDB::bind_method(D_METHOD("event_is_action", "event", "action", "exact_match"), &InputMap::event_is_action, DEFVAL(false));
 	ClassDB::bind_method(D_METHOD("load_from_project_settings"), &InputMap::load_from_project_settings);
 }
 
@@ -95,7 +95,7 @@ List<StringName> InputMap::get_actions() const {
 	return actions;
 }
 
-List<Ref<InputEvent>>::Element *InputMap::_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool *p_pressed, float *p_strength, float *p_raw_strength) const {
+List<Ref<InputEvent>>::Element *InputMap::_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool p_exact_match, bool *p_pressed, float *p_strength, float *p_raw_strength) const {
 	ERR_FAIL_COND_V(!p_event.is_valid(), nullptr);
 
 	for (List<Ref<InputEvent>>::Element *E = p_action.inputs.front(); E; E = E->next()) {
@@ -106,7 +106,9 @@ List<Ref<InputEvent>>::Element *InputMap::_find_event(Action &p_action, const Re
 
 		int device = e->get_device();
 		if (device == ALL_DEVICES || device == p_event->get_device()) {
-			if (e->action_match(p_event, p_pressed, p_strength, p_raw_strength, p_action.deadzone)) {
+			if (p_exact_match && e->shortcut_match(p_event)) {
+				return E;
+			} else if (!p_exact_match && e->action_match(p_event, p_pressed, p_strength, p_raw_strength, p_action.deadzone)) {
 				return E;
 			}
 		}
@@ -134,7 +136,7 @@ void InputMap::action_set_deadzone(const StringName &p_action, float p_deadzone)
 void InputMap::action_add_event(const StringName &p_action, const Ref<InputEvent> &p_event) {
 	ERR_FAIL_COND_MSG(p_event.is_null(), "It's not a reference to a valid InputEvent object.");
 	ERR_FAIL_COND_MSG(!input_map.has(p_action), "Request for nonexistent InputMap action '" + String(p_action) + "'.");
-	if (_find_event(input_map[p_action], p_event)) {
+	if (_find_event(input_map[p_action], p_event, true)) {
 		return; // Already addded.
 	}
 
@@ -143,13 +145,13 @@ void InputMap::action_add_event(const StringName &p_action, const Ref<InputEvent
 
 bool InputMap::action_has_event(const StringName &p_action, const Ref<InputEvent> &p_event) {
 	ERR_FAIL_COND_V_MSG(!input_map.has(p_action), false, "Request for nonexistent InputMap action '" + String(p_action) + "'.");
-	return (_find_event(input_map[p_action], p_event) != nullptr);
+	return (_find_event(input_map[p_action], p_event, true) != nullptr);
 }
 
 void InputMap::action_erase_event(const StringName &p_action, const Ref<InputEvent> &p_event) {
 	ERR_FAIL_COND_MSG(!input_map.has(p_action), "Request for nonexistent InputMap action '" + String(p_action) + "'.");
 
-	List<Ref<InputEvent>>::Element *E = _find_event(input_map[p_action], p_event);
+	List<Ref<InputEvent>>::Element *E = _find_event(input_map[p_action], p_event, true);
 	if (E) {
 		input_map[p_action].inputs.erase(E);
 		if (Input::get_singleton()->is_action_pressed(p_action)) {
@@ -185,11 +187,11 @@ const List<Ref<InputEvent>> *InputMap::action_get_events(const StringName &p_act
 	return &E->get().inputs;
 }
 
-bool InputMap::event_is_action(const Ref<InputEvent> &p_event, const StringName &p_action) const {
-	return event_get_action_status(p_event, p_action);
+bool InputMap::event_is_action(const Ref<InputEvent> &p_event, const StringName &p_action, bool p_exact_match) const {
+	return event_get_action_status(p_event, p_action, p_exact_match);
 }
 
-bool InputMap::event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool *p_pressed, float *p_strength, float *p_raw_strength) const {
+bool InputMap::event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool p_exact_match, bool *p_pressed, float *p_strength, float *p_raw_strength) const {
 	Map<StringName, Action>::Element *E = input_map.find(p_action);
 	ERR_FAIL_COND_V_MSG(!E, false, "Request for nonexistent InputMap action '" + String(p_action) + "'.");
 
@@ -207,7 +209,7 @@ bool InputMap::event_get_action_status(const Ref<InputEvent> &p_event, const Str
 	bool pressed;
 	float strength;
 	float raw_strength;
-	List<Ref<InputEvent>>::Element *event = _find_event(E->get(), p_event, &pressed, &strength, &raw_strength);
+	List<Ref<InputEvent>>::Element *event = _find_event(E->get(), p_event, p_exact_match, &pressed, &strength, &raw_strength);
 	if (event != nullptr) {
 		if (p_pressed != nullptr) {
 			*p_pressed = pressed;
diff --git a/core/input/input_map.h b/core/input/input_map.h
index 948d78ebdd..cec25d2330 100644
--- a/core/input/input_map.h
+++ b/core/input/input_map.h
@@ -54,7 +54,7 @@ private:
 
 	mutable Map<StringName, Action> input_map;
 
-	List<Ref<InputEvent>>::Element *_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool *p_pressed = nullptr, float *p_strength = nullptr, float *p_raw_strength = nullptr) const;
+	List<Ref<InputEvent>>::Element *_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool p_exact_match = false, bool *p_pressed = nullptr, float *p_strength = nullptr, float *p_raw_strength = nullptr) const;
 
 	Array _action_get_events(const StringName &p_action);
 	Array _get_actions();
@@ -78,8 +78,8 @@ public:
 	void action_erase_events(const StringName &p_action);
 
 	const List<Ref<InputEvent>> *action_get_events(const StringName &p_action);
-	bool event_is_action(const Ref<InputEvent> &p_event, const StringName &p_action) const;
-	bool event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool *p_pressed = nullptr, float *p_strength = nullptr, float *p_raw_strength = nullptr) const;
+	bool event_is_action(const Ref<InputEvent> &p_event, const StringName &p_action, bool p_exact_match = false) const;
+	bool event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool p_exact_match = false, bool *p_pressed = nullptr, float *p_strength = nullptr, float *p_raw_strength = nullptr) const;
 
 	const Map<StringName, Action> &get_action_map() const;
 	void load_from_project_settings();