Merge pull request #52811 from Faless/js/4.x_our_input

platform/javascript/.eslintrc.libs.js

@@ -15,6 +15,7 @@ module.exports = {
 		"IDBFS": true,
 		"GodotOS": true,
 		"GodotConfig": true,
+		"GodotEventListeners": true,
 		"GodotRuntime": true,
 		"GodotFS": true,
 		"IDHandler": true,

platform/javascript/SCsub

@@ -20,6 +20,7 @@ sys_env.AddJSLibraries(
         "js/libs/library_godot_fetch.js",
         "js/libs/library_godot_os.js",
         "js/libs/library_godot_runtime.js",
+        "js/libs/library_godot_input.js",
     ]
 )
 

platform/javascript/display_server_javascript.cpp

@@ -62,26 +62,13 @@ bool DisplayServerJavaScript::check_size_force_redraw() {
 	return godot_js_display_size_update() != 0;
 }
 
-Point2 DisplayServerJavaScript::compute_position_in_canvas(int p_x, int p_y) {
-	int point[2];
-	godot_js_display_compute_position(p_x, p_y, point, point + 1);
-	return Point2(point[0], point[1]);
-}
-
-EM_BOOL DisplayServerJavaScript::fullscreen_change_callback(int p_event_type, const EmscriptenFullscreenChangeEvent *p_event, void *p_user_data) {
+void DisplayServerJavaScript::fullscreen_change_callback(int p_fullscreen) {
 	DisplayServerJavaScript *display = get_singleton();
-	// Empty ID is canvas.
-	String target_id = String::utf8(p_event->id);
-	if (target_id.is_empty() || target_id == String::utf8(&(display->canvas_id[1]))) {
-		// This event property is the only reliable data on
-		// browser fullscreen state.
-		if (p_event->isFullscreen) {
-			display->window_mode = WINDOW_MODE_FULLSCREEN;
-		} else {
-			display->window_mode = WINDOW_MODE_WINDOWED;
-		}
+	if (p_fullscreen) {
+		display->window_mode = WINDOW_MODE_FULLSCREEN;
+	} else {
+		display->window_mode = WINDOW_MODE_WINDOWED;
 	}
-	return false;
 }
 
 // Drag and drop callback.
@@ -118,88 +105,51 @@ void DisplayServerJavaScript::request_quit_callback() {
 
 // Keys
 
-template <typename T>
-void DisplayServerJavaScript::dom2godot_mod(T *emscripten_event_ptr, Ref<InputEventWithModifiers> godot_event) {
-	godot_event->set_shift_pressed(emscripten_event_ptr->shiftKey);
-	godot_event->set_alt_pressed(emscripten_event_ptr->altKey);
-	godot_event->set_ctrl_pressed(emscripten_event_ptr->ctrlKey);
-	godot_event->set_meta_pressed(emscripten_event_ptr->metaKey);
+void DisplayServerJavaScript::dom2godot_mod(Ref<InputEventWithModifiers> ev, int p_mod) {
+	ev->set_shift_pressed(p_mod & 1);
+	ev->set_alt_pressed(p_mod & 2);
+	ev->set_ctrl_pressed(p_mod & 4);
+	ev->set_meta_pressed(p_mod & 8);
 }
 
-Ref<InputEventKey> DisplayServerJavaScript::setup_key_event(const EmscriptenKeyboardEvent *emscripten_event) {
+void DisplayServerJavaScript::key_callback(int p_pressed, int p_repeat, int p_modifiers) {
+	DisplayServerJavaScript *ds = get_singleton();
+	JSKeyEvent &key_event = ds->key_event;
+	// Resume audio context after input in case autoplay was denied.
+	OS_JavaScript::get_singleton()->resume_audio();
+
 	Ref<InputEventKey> ev;
 	ev.instantiate();
-	ev->set_echo(emscripten_event->repeat);
-	dom2godot_mod(emscripten_event, ev);
-	ev->set_keycode(dom_code2godot_scancode(emscripten_event->code, emscripten_event->key, false));
-	ev->set_physical_keycode(dom_code2godot_scancode(emscripten_event->code, emscripten_event->key, true));
-
-	String unicode = String::utf8(emscripten_event->key);
-	// Check if empty or multi-character (e.g. `CapsLock`).
-	if (unicode.length() != 1) {
-		// Might be empty as well, but better than nonsense.
-		unicode = String::utf8(emscripten_event->charValue);
-	}
+	ev->set_echo(p_repeat);
+	ev->set_keycode(dom_code2godot_scancode(key_event.code, key_event.key, false));
+	ev->set_physical_keycode(dom_code2godot_scancode(key_event.code, key_event.key, true));
+	ev->set_pressed(p_pressed);
+	dom2godot_mod(ev, p_modifiers);
+
+	String unicode = String::utf8(key_event.key);
 	if (unicode.length() == 1) {
 		ev->set_unicode(unicode[0]);
 	}
-
-	return ev;
-}
-
-EM_BOOL DisplayServerJavaScript::keydown_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *display = get_singleton();
-	Ref<InputEventKey> ev = setup_key_event(p_event);
-	ev->set_pressed(true);
-	if (ev->get_unicode() == 0 && keycode_has_unicode(ev->get_keycode())) {
-		// Defer to keypress event for legacy unicode retrieval.
-		display->deferred_key_event = ev;
-		// Do not suppress keypress event.
-		return false;
-	}
 	Input::get_singleton()->parse_input_event(ev);
 
 	// Make sure to flush all events so we can call restricted APIs inside the event.
 	Input::get_singleton()->flush_buffered_events();
-
-	return true;
-}
-
-EM_BOOL DisplayServerJavaScript::keypress_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *display = get_singleton();
-	display->deferred_key_event->set_unicode(p_event->charCode);
-	Input::get_singleton()->parse_input_event(display->deferred_key_event);
-
-	// Make sure to flush all events so we can call restricted APIs inside the event.
-	Input::get_singleton()->flush_buffered_events();
-
-	return true;
-}
-
-EM_BOOL DisplayServerJavaScript::keyup_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data) {
-	Ref<InputEventKey> ev = setup_key_event(p_event);
-	ev->set_pressed(false);
-	Input::get_singleton()->parse_input_event(ev);
-
-	// Make sure to flush all events so we can call restricted APIs inside the event.
-	Input::get_singleton()->flush_buffered_events();
-
-	return ev->get_keycode() != KEY_UNKNOWN && ev->get_keycode() != (Key)0;
 }
 
 // Mouse
 
-EM_BOOL DisplayServerJavaScript::mouse_button_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *display = get_singleton();
+int DisplayServerJavaScript::mouse_button_callback(int p_pressed, int p_button, double p_x, double p_y, int p_modifiers) {
+	DisplayServerJavaScript *ds = get_singleton();
 
 	Ref<InputEventMouseButton> ev;
 	ev.instantiate();
-	ev->set_pressed(p_event_type == EMSCRIPTEN_EVENT_MOUSEDOWN);
-	ev->set_position(compute_position_in_canvas(p_event->clientX, p_event->clientY));
+	ev->set_pressed(p_pressed);
+	ev->set_position(Point2(p_x, p_y));
 	ev->set_global_position(ev->get_position());
-	dom2godot_mod(p_event, ev);
+	ev->set_pressed(p_pressed);
+	dom2godot_mod(ev, p_modifiers);
 
-	switch (p_event->button) {
+	switch (p_button) {
 		case DOM_BUTTON_LEFT:
 			ev->set_button_index(MOUSE_BUTTON_LEFT);
 			break;
@@ -219,34 +169,30 @@ EM_BOOL DisplayServerJavaScript::mouse_button_callback(int p_event_type, const E
 			return false;
 	}
 
-	if (ev->is_pressed()) {
-		double diff = emscripten_get_now() - display->last_click_ms;
+	if (p_pressed) {
+		uint64_t diff = (OS::get_singleton()->get_ticks_usec() / 1000) - ds->last_click_ms;
 
-		if (ev->get_button_index() == display->last_click_button_index) {
-			if (diff < 400 && Point2(display->last_click_pos).distance_to(ev->get_position()) < 5) {
-				display->last_click_ms = 0;
-				display->last_click_pos = Point2(-100, -100);
-				display->last_click_button_index = -1;
+		if (ev->get_button_index() == ds->last_click_button_index) {
+			if (diff < 400 && Point2(ds->last_click_pos).distance_to(ev->get_position()) < 5) {
+				ds->last_click_ms = 0;
+				ds->last_click_pos = Point2(-100, -100);
+				ds->last_click_button_index = -1;
 				ev->set_double_click(true);
 			}
 
 		} else {
-			display->last_click_button_index = ev->get_button_index();
+			ds->last_click_button_index = ev->get_button_index();
 		}
 
 		if (!ev->is_double_click()) {
-			display->last_click_ms += diff;
-			display->last_click_pos = ev->get_position();
+			ds->last_click_ms += diff;
+			ds->last_click_pos = ev->get_position();
 		}
 	}
 
-	Input *input = Input::get_singleton();
-	int mask = input->get_mouse_button_mask();
-	MouseButton button_flag = MouseButton(1 << (ev->get_button_index() - 1));
+	int mask = Input::get_singleton()->get_mouse_button_mask();
+	int button_flag = 1 << (ev->get_button_index() - 1);
 	if (ev->is_pressed()) {
-		// Since the event is consumed, focus manually. The containing iframe,
-		// if exists, may not have focus yet, so focus even if already focused.
-		focus_canvas();
 		mask |= button_flag;
 	} else if (mask & button_flag) {
 		mask &= ~button_flag;
@@ -256,7 +202,9 @@ EM_BOOL DisplayServerJavaScript::mouse_button_callback(int p_event_type, const E
 	}
 	ev->set_button_mask(mask);
 
-	input->parse_input_event(ev);
+	Input::get_singleton()->parse_input_event(ev);
+	// Resume audio context after input in case autoplay was denied.
+	OS_JavaScript::get_singleton()->resume_audio();
 
 	// Make sure to flush all events so we can call restricted APIs inside the event.
 	Input::get_singleton()->flush_buffered_events();
@@ -266,31 +214,26 @@ EM_BOOL DisplayServerJavaScript::mouse_button_callback(int p_event_type, const E
 	return true;
 }
 
-EM_BOOL DisplayServerJavaScript::mousemove_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *ds = get_singleton();
-	Input *input = Input::get_singleton();
-	int input_mask = input->get_mouse_button_mask();
-	Point2 pos = compute_position_in_canvas(p_event->clientX, p_event->clientY);
+void DisplayServerJavaScript::mouse_move_callback(double p_x, double p_y, double p_rel_x, double p_rel_y, int p_modifiers) {
+	int input_mask = Input::get_singleton()->get_mouse_button_mask();
 	// For motion outside the canvas, only read mouse movement if dragging
 	// started inside the canvas; imitating desktop app behaviour.
-	if (!ds->cursor_inside_canvas && !input_mask)
-		return false;
+	if (!get_singleton()->cursor_inside_canvas && !input_mask)
+		return;
 
 	Ref<InputEventMouseMotion> ev;
 	ev.instantiate();
-	dom2godot_mod(p_event, ev);
+	dom2godot_mod(ev, p_modifiers);
 	ev->set_button_mask(input_mask);
 
-	ev->set_position(pos);
+	ev->set_position(Point2(p_x, p_y));
 	ev->set_global_position(ev->get_position());
 
-	ev->set_relative(Vector2(p_event->movementX, p_event->movementY));
-	input->set_mouse_position(ev->get_position());
-	ev->set_speed(input->get_last_mouse_speed());
+	ev->set_relative(Vector2(p_rel_x, p_rel_y));
+	Input::get_singleton()->set_mouse_position(ev->get_position());
+	ev->set_speed(Input::get_singleton()->get_last_mouse_speed());
 
-	input->parse_input_event(ev);
-	// Don't suppress mouseover/-leave events.
-	return false;
+	Input::get_singleton()->parse_input_event(ev);
 }
 
 // Cursor
@@ -430,17 +373,15 @@ void DisplayServerJavaScript::mouse_set_mode(MouseMode p_mode) {
 
 	if (p_mode == MOUSE_MODE_VISIBLE) {
 		godot_js_display_cursor_set_visible(1);
-		emscripten_exit_pointerlock();
+		godot_js_display_cursor_lock_set(0);
 
 	} else if (p_mode == MOUSE_MODE_HIDDEN) {
 		godot_js_display_cursor_set_visible(0);
-		emscripten_exit_pointerlock();
+		godot_js_display_cursor_lock_set(0);
 
 	} else if (p_mode == MOUSE_MODE_CAPTURED) {
 		godot_js_display_cursor_set_visible(1);
-		EMSCRIPTEN_RESULT result = emscripten_request_pointerlock(canvas_id, false);
-		ERR_FAIL_COND_MSG(result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED, "MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback.");
-		ERR_FAIL_COND_MSG(result != EMSCRIPTEN_RESULT_SUCCESS, "MOUSE_MODE_CAPTURED can only be entered from within an appropriate input callback.");
+		godot_js_display_cursor_lock_set(1);
 	}
 }
 
@@ -449,18 +390,17 @@ DisplayServer::MouseMode DisplayServerJavaScript::mouse_get_mode() const {
 		return MOUSE_MODE_HIDDEN;
 	}
 
-	EmscriptenPointerlockChangeEvent ev;
-	emscripten_get_pointerlock_status(&ev);
-	return (ev.isActive && String::utf8(ev.id) == String::utf8(&canvas_id[1])) ? MOUSE_MODE_CAPTURED : MOUSE_MODE_VISIBLE;
+	if (godot_js_display_cursor_is_locked()) {
+		return MOUSE_MODE_CAPTURED;
+	}
+	return MOUSE_MODE_VISIBLE;
 }
 
 // Wheel
-EM_BOOL DisplayServerJavaScript::wheel_callback(int p_event_type, const EmscriptenWheelEvent *p_event, void *p_user_data) {
-	ERR_FAIL_COND_V(p_event_type != EMSCRIPTEN_EVENT_WHEEL, false);
-	DisplayServerJavaScript *ds = get_singleton();
-	if (!is_canvas_focused()) {
-		if (ds->cursor_inside_canvas) {
-			focus_canvas();
+int DisplayServerJavaScript::mouse_wheel_callback(double p_delta_x, double p_delta_y) {
+	if (!godot_js_display_canvas_is_focused()) {
+		if (get_singleton()->cursor_inside_canvas) {
+			godot_js_display_canvas_focus();
 		} else {
 			return false;
 		}
@@ -477,16 +417,17 @@ EM_BOOL DisplayServerJavaScript::wheel_callback(int p_event_type, const Emscript
 	ev->set_ctrl_pressed(input->is_key_pressed(KEY_CTRL));
 	ev->set_meta_pressed(input->is_key_pressed(KEY_META));
 
-	if (p_event->deltaY < 0)
+	if (p_delta_y < 0) {
 		ev->set_button_index(MOUSE_BUTTON_WHEEL_UP);
-	else if (p_event->deltaY > 0)
+	} else if (p_delta_y > 0) {
 		ev->set_button_index(MOUSE_BUTTON_WHEEL_DOWN);
-	else if (p_event->deltaX > 0)
+	} else if (p_delta_x > 0) {
 		ev->set_button_index(MOUSE_BUTTON_WHEEL_LEFT);
-	else if (p_event->deltaX < 0)
+	} else if (p_delta_x < 0) {
 		ev->set_button_index(MOUSE_BUTTON_WHEEL_RIGHT);
-	else
+	} else {
 		return false;
+	}
 
 	// Different browsers give wildly different delta values, and we can't
 	// interpret deltaMode, so use default value for wheel events' factor.
@@ -494,7 +435,7 @@ EM_BOOL DisplayServerJavaScript::wheel_callback(int p_event_type, const Emscript
 	int button_flag = 1 << (ev->get_button_index() - 1);
 
 	ev->set_pressed(true);
-	ev->set_button_mask(MouseButton(input->get_mouse_button_mask() | button_flag));
+	ev->set_button_mask(input->get_mouse_button_mask() | button_flag);
 	input->parse_input_event(ev);
 
 	Ref<InputEventMouseButton> release = ev->duplicate();
@@ -506,52 +447,43 @@ EM_BOOL DisplayServerJavaScript::wheel_callback(int p_event_type, const Emscript
 }
 
 // Touch
-EM_BOOL DisplayServerJavaScript::touch_press_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *display = get_singleton();
-	Ref<InputEventScreenTouch> ev;
-	int lowest_id_index = -1;
-	for (int i = 0; i < p_event->numTouches; ++i) {
-		const EmscriptenTouchPoint &touch = p_event->touches[i];
-		if (lowest_id_index == -1 || touch.identifier < p_event->touches[lowest_id_index].identifier)
-			lowest_id_index = i;
-		if (!touch.isChanged)
-			continue;
-		ev.instantiate();
-		ev->set_index(touch.identifier);
-		ev->set_position(compute_position_in_canvas(touch.clientX, touch.clientY));
-		display->touches[i] = ev->get_position();
-		ev->set_pressed(p_event_type == EMSCRIPTEN_EVENT_TOUCHSTART);
+void DisplayServerJavaScript::touch_callback(int p_type, int p_count) {
+	DisplayServerJavaScript *ds = get_singleton();
 
-		Input::get_singleton()->parse_input_event(ev);
-	}
+	const JSTouchEvent &touch_event = ds->touch_event;
+	for (int i = 0; i < p_count; i++) {
+		Point2 point(touch_event.coords[i * 2], touch_event.coords[i * 2 + 1]);
+		if (p_type == 2) {
+			// touchmove
+			Ref<InputEventScreenDrag> ev;
+			ev.instantiate();
+			ev->set_index(touch_event.identifier[i]);
+			ev->set_position(point);
+
+			Point2 &prev = ds->touches[i];
+			ev->set_relative(ev->get_position() - prev);
+			prev = ev->get_position();
+
+			Input::get_singleton()->parse_input_event(ev);
+		} else {
+			// touchstart/touchend
+			Ref<InputEventScreenTouch> ev;
 
-	// Make sure to flush all events so we can call restricted APIs inside the event.
-	Input::get_singleton()->flush_buffered_events();
+			// Resume audio context after input in case autoplay was denied.
+			OS_JavaScript::get_singleton()->resume_audio();
 
-	// Resume audio context after input in case autoplay was denied.
-	return true;
-}
+			ev.instantiate();
+			ev->set_index(touch_event.identifier[i]);
+			ev->set_position(point);
+			ev->set_pressed(p_type == 0);
+			ds->touches[i] = point;
 
-EM_BOOL DisplayServerJavaScript::touchmove_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data) {
-	DisplayServerJavaScript *display = get_singleton();
-	Ref<InputEventScreenDrag> ev;
-	int lowest_id_index = -1;
-	for (int i = 0; i < p_event->numTouches; ++i) {
-		const EmscriptenTouchPoint &touch = p_event->touches[i];
-		if (lowest_id_index == -1 || touch.identifier < p_event->touches[lowest_id_index].identifier)
-			lowest_id_index = i;
-		if (!touch.isChanged)
-			continue;
-		ev.instantiate();
-		ev->set_index(touch.identifier);
-		ev->set_position(compute_position_in_canvas(touch.clientX, touch.clientY));
-		Point2 &prev = display->touches[i];
-		ev->set_relative(ev->get_position() - prev);
-		prev = ev->get_position();
-
-		Input::get_singleton()->parse_input_event(ev);
+			Input::get_singleton()->parse_input_event(ev);
+
+			// Make sure to flush all events so we can call restricted APIs inside the event.
+			Input::get_singleton()->flush_buffered_events();
+		}
 	}
-	return true;
 }
 
 bool DisplayServerJavaScript::screen_is_touchscreen(int p_screen) const {
@@ -595,10 +527,8 @@ void DisplayServerJavaScript::virtual_keyboard_hide() {
 	godot_js_display_vk_hide();
 }
 
-// Window blur callback
-EM_BOOL DisplayServerJavaScript::blur_callback(int p_event_type, const EmscriptenFocusEvent *p_event, void *p_user_data) {
+void DisplayServerJavaScript::window_blur_callback() {
 	Input::get_singleton()->release_pressed_events();
-	return false;
 }
 
 // Gamepad
@@ -613,14 +543,14 @@ void DisplayServerJavaScript::gamepad_callback(int p_index, int p_connected, con
 
 void DisplayServerJavaScript::process_joypads() {
 	Input *input = Input::get_singleton();
-	int32_t pads = godot_js_display_gamepad_sample_count();
+	int32_t pads = godot_js_input_gamepad_sample_count();
 	int32_t s_btns_num = 0;
 	int32_t s_axes_num = 0;
 	int32_t s_standard = 0;
 	float s_btns[16];
 	float s_axes[10];
 	for (int idx = 0; idx < pads; idx++) {
-		int err = godot_js_display_gamepad_sample_get(idx, s_btns, &s_btns_num, s_axes, &s_axes_num, &s_standard);
+		int err = godot_js_input_gamepad_sample_get(idx, s_btns, &s_btns_num, s_axes, &s_axes_num, &s_standard);
 		if (err) {
 			continue;
 		}
@@ -718,11 +648,6 @@ void DisplayServerJavaScript::set_icon(const Ref<Image> &p_icon) {
 }
 
 void DisplayServerJavaScript::_dispatch_input_event(const Ref<InputEvent> &p_event) {
-	OS_JavaScript *os = OS_JavaScript::get_singleton();
-
-	// Resume audio context after input in case autoplay was denied.
-	os->resume_audio();
-
 	Callable cb = get_singleton()->input_event_callback;
 	if (!cb.is_null()) {
 		Variant ev = p_event;
@@ -788,44 +713,24 @@ DisplayServerJavaScript::DisplayServerJavaScript(const String &p_rendering_drive
 	video_driver_index = p_video_driver;
 #endif
 
-	EMSCRIPTEN_RESULT result;
-#define EM_CHECK(ev)                         \
-	if (result != EMSCRIPTEN_RESULT_SUCCESS) \
-		ERR_PRINT("Error while setting " #ev " callback: Code " + itos(result));
-#define SET_EM_CALLBACK(target, ev, cb)                                  \
-	result = emscripten_set_##ev##_callback(target, nullptr, true, &cb); \
-	EM_CHECK(ev)
-#define SET_EM_WINDOW_CALLBACK(ev, cb)                                                            \
-	result = emscripten_set_##ev##_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, nullptr, false, &cb); \
-	EM_CHECK(ev)
-	// These callbacks from Emscripten's html5.h suffice to access most
-	// JavaScript APIs.
-	SET_EM_CALLBACK(canvas_id, mousedown, mouse_button_callback)
-	SET_EM_WINDOW_CALLBACK(mousemove, mousemove_callback)
-	SET_EM_WINDOW_CALLBACK(mouseup, mouse_button_callback)
-	SET_EM_WINDOW_CALLBACK(blur, blur_callback)
-	SET_EM_CALLBACK(canvas_id, wheel, wheel_callback)
-	SET_EM_CALLBACK(canvas_id, touchstart, touch_press_callback)
-	SET_EM_CALLBACK(canvas_id, touchmove, touchmove_callback)
-	SET_EM_CALLBACK(canvas_id, touchend, touch_press_callback)
-	SET_EM_CALLBACK(canvas_id, touchcancel, touch_press_callback)
-	SET_EM_CALLBACK(canvas_id, keydown, keydown_callback)
-	SET_EM_CALLBACK(canvas_id, keypress, keypress_callback)
-	SET_EM_CALLBACK(canvas_id, keyup, keyup_callback)
-	SET_EM_CALLBACK(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, fullscreenchange, fullscreen_change_callback)
-#undef SET_EM_CALLBACK
-#undef EM_CHECK
-
-	// For APIs that are not (sufficiently) exposed, a
-	// library is used below (implemented in library_godot_display.js).
+	// JS Input interface (js/libs/library_godot_input.js)
+	godot_js_input_mouse_button_cb(&DisplayServerJavaScript::mouse_button_callback);
+	godot_js_input_mouse_move_cb(&DisplayServerJavaScript::mouse_move_callback);
+	godot_js_input_mouse_wheel_cb(&DisplayServerJavaScript::mouse_wheel_callback);
+	godot_js_input_touch_cb(&DisplayServerJavaScript::touch_callback, touch_event.identifier, touch_event.coords);
+	godot_js_input_key_cb(&DisplayServerJavaScript::key_callback, key_event.code, key_event.key);
+	godot_js_input_paste_cb(update_clipboard_callback);
+	godot_js_input_drop_files_cb(drop_files_js_callback);
+	godot_js_input_gamepad_cb(&DisplayServerJavaScript::gamepad_callback);
+
+	// JS Display interface (js/libs/library_godot_display.js)
+	godot_js_display_fullscreen_cb(&DisplayServerJavaScript::fullscreen_change_callback);
+	godot_js_display_window_blur_cb(&window_blur_callback);
 	godot_js_display_notification_cb(&send_window_event_callback,
 			WINDOW_EVENT_MOUSE_ENTER,
 			WINDOW_EVENT_MOUSE_EXIT,
 			WINDOW_EVENT_FOCUS_IN,
 			WINDOW_EVENT_FOCUS_OUT);
-	godot_js_display_paste_cb(update_clipboard_callback);
-	godot_js_display_drop_files_cb(drop_files_js_callback);
-	godot_js_display_gamepad_cb(&DisplayServerJavaScript::gamepad_callback);
 	godot_js_display_vk_cb(&vk_input_text_callback);
 
 	Input::get_singleton()->set_event_dispatch_function(_dispatch_input_event);
@@ -1048,7 +953,7 @@ bool DisplayServerJavaScript::can_any_window_draw() const {
 
 void DisplayServerJavaScript::process_events() {
 	Input::get_singleton()->flush_buffered_events();
-	if (godot_js_display_gamepad_sample() == OK) {
+	if (godot_js_input_gamepad_sample() == OK) {
 		process_joypads();
 	}
 }

platform/javascript/display_server_javascript.h

@@ -38,6 +38,19 @@
 
 class DisplayServerJavaScript : public DisplayServer {
 private:
+	struct JSTouchEvent {
+		uint32_t identifier[32] = { 0 };
+		double coords[64] = { 0 };
+	};
+	JSTouchEvent touch_event;
+
+	struct JSKeyEvent {
+		char code[32] = { 0 };
+		char key[32] = { 0 };
+		uint8_t modifiers[4] = { 0 };
+	};
+	JSKeyEvent key_event;
+
 	WindowMode window_mode = WINDOW_MODE_WINDOWED;
 	ObjectID window_attached_instance_id = {};
 
@@ -47,46 +60,31 @@ private:
 	Callable drop_files_callback;
 
 	String clipboard;
-	Ref<InputEventKey> deferred_key_event;
 	Point2 touches[32];
 
 	char canvas_id[256] = { 0 };
 	bool cursor_inside_canvas = true;
 	CursorShape cursor_shape = CURSOR_ARROW;
 	Point2i last_click_pos = Point2(-100, -100); // TODO check this again.
-	double last_click_ms = 0;
+	uint64_t last_click_ms = 0;
 	int last_click_button_index = -1;
 
 	bool swap_cancel_ok = false;
 
 	// utilities
-	static Point2 compute_position_in_canvas(int p_x, int p_y);
 	static void focus_canvas();
 	static bool is_canvas_focused();
-	template <typename T>
-	static void dom2godot_mod(T *emscripten_event_ptr, Ref<InputEventWithModifiers> godot_event);
-	static Ref<InputEventKey> setup_key_event(const EmscriptenKeyboardEvent *emscripten_event);
+	static void dom2godot_mod(Ref<InputEventWithModifiers> ev, int p_mod);
 	static const char *godot2dom_cursor(DisplayServer::CursorShape p_shape);
 
 	// events
-	static EM_BOOL fullscreen_change_callback(int p_event_type, const EmscriptenFullscreenChangeEvent *p_event, void *p_user_data);
-
-	static EM_BOOL keydown_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
-	static EM_BOOL keypress_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
-	static EM_BOOL keyup_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
-
+	static void fullscreen_change_callback(int p_fullscreen);
+	static int mouse_button_callback(int p_pressed, int p_button, double p_x, double p_y, int p_modifiers);
+	static void mouse_move_callback(double p_x, double p_y, double p_rel_x, double p_rel_y, int p_modifiers);
+	static int mouse_wheel_callback(double p_delta_x, double p_delta_y);
+	static void touch_callback(int p_type, int p_count);
+	static void key_callback(int p_pressed, int p_repeat, int p_modifiers);
 	static void vk_input_text_callback(const char *p_text, int p_cursor);
-
-	static EM_BOOL mousemove_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
-	static EM_BOOL mouse_button_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
-
-	static EM_BOOL wheel_callback(int p_event_type, const EmscriptenWheelEvent *p_event, void *p_user_data);
-
-	static EM_BOOL touch_press_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data);
-	static EM_BOOL touchmove_callback(int p_event_type, const EmscriptenTouchEvent *p_event, void *p_user_data);
-
-	static EM_BOOL blur_callback(int p_event_type, const EmscriptenFocusEvent *p_event, void *p_user_data);
-
 	static void gamepad_callback(int p_index, int p_connected, const char *p_id, const char *p_guid);
 	void process_joypads();
 
@@ -96,6 +94,7 @@ private:
 	static void _dispatch_input_event(const Ref<InputEvent> &p_event);
 
 	static void request_quit_callback();
+	static void window_blur_callback();
 	static void update_clipboard_callback(const char *p_text);
 	static void send_window_event_callback(int p_notification);
 	static void drop_files_js_callback(char **p_filev, int p_filec);

platform/javascript/godot_js.h

@@ -50,12 +50,28 @@ extern int godot_js_os_execute(const char *p_json);
 extern void godot_js_os_shell_open(const char *p_uri);
 extern int godot_js_os_hw_concurrency_get();
 
+// Input
+extern void godot_js_input_mouse_button_cb(int (*p_callback)(int p_pressed, int p_button, double p_x, double p_y, int p_modifiers));
+extern void godot_js_input_mouse_move_cb(void (*p_callback)(double p_x, double p_y, double p_rel_x, double p_rel_y, int p_modifiers));
+extern void godot_js_input_mouse_wheel_cb(int (*p_callback)(double p_delta_x, double p_delta_y));
+extern void godot_js_input_touch_cb(void (*p_callback)(int p_type, int p_count), uint32_t *r_identifiers, double *r_coords);
+extern void godot_js_input_key_cb(void (*p_callback)(int p_type, int p_repeat, int p_modifiers), char r_code[32], char r_key[32]);
+
+// Input gamepad
+extern void godot_js_input_gamepad_cb(void (*p_on_change)(int p_index, int p_connected, const char *p_id, const char *p_guid));
+extern int godot_js_input_gamepad_sample();
+extern int godot_js_input_gamepad_sample_count();
+extern int godot_js_input_gamepad_sample_get(int p_idx, float r_btns[16], int32_t *r_btns_num, float r_axes[10], int32_t *r_axes_num, int32_t *r_standard);
+extern void godot_js_input_paste_cb(void (*p_callback)(const char *p_text));
+extern void godot_js_input_drop_files_cb(void (*p_callback)(char **p_filev, int p_filec));
+
 // Display
 extern int godot_js_display_screen_dpi_get();
 extern double godot_js_display_pixel_ratio_get();
 extern void godot_js_display_alert(const char *p_text);
 extern int godot_js_display_touchscreen_is_available();
 extern int godot_js_display_is_swap_ok_cancel();
+extern void godot_js_display_setup_canvas(int p_width, int p_height, int p_fullscreen, int p_hidpi);
 
 // Display canvas
 extern void godot_js_display_canvas_focus();
@@ -68,7 +84,6 @@ extern void godot_js_display_window_size_get(int32_t *p_x, int32_t *p_y);
 extern void godot_js_display_screen_size_get(int32_t *p_x, int32_t *p_y);
 extern int godot_js_display_fullscreen_request();
 extern int godot_js_display_fullscreen_exit();
-extern void godot_js_display_compute_position(int p_x, int p_y, int32_t *r_x, int32_t *r_y);
 extern void godot_js_display_window_title_set(const char *p_text);
 extern void godot_js_display_window_icon_set(const uint8_t *p_ptr, int p_len);
 extern int godot_js_display_has_webgl(int p_version);
@@ -82,18 +97,13 @@ extern void godot_js_display_cursor_set_shape(const char *p_cursor);
 extern int godot_js_display_cursor_is_hidden();
 extern void godot_js_display_cursor_set_custom_shape(const char *p_shape, const uint8_t *p_ptr, int p_len, int p_hotspot_x, int p_hotspot_y);
 extern void godot_js_display_cursor_set_visible(int p_visible);
-
-// Display gamepad
-extern void godot_js_display_gamepad_cb(void (*p_on_change)(int p_index, int p_connected, const char *p_id, const char *p_guid));
-extern int godot_js_display_gamepad_sample();
-extern int godot_js_display_gamepad_sample_count();
-extern int godot_js_display_gamepad_sample_get(int p_idx, float r_btns[16], int32_t *r_btns_num, float r_axes[10], int32_t *r_axes_num, int32_t *r_standard);
+extern void godot_js_display_cursor_lock_set(int p_lock);
+extern int godot_js_display_cursor_is_locked();
 
 // Display listeners
+extern void godot_js_display_fullscreen_cb(void (*p_callback)(int p_fullscreen));
+extern void godot_js_display_window_blur_cb(void (*p_callback)());
 extern void godot_js_display_notification_cb(void (*p_callback)(int p_notification), int p_enter, int p_exit, int p_in, int p_out);
-extern void godot_js_display_paste_cb(void (*p_callback)(const char *p_text));
-extern void godot_js_display_drop_files_cb(void (*p_callback)(char **p_filev, int p_filec));
-extern void godot_js_display_setup_canvas(int p_width, int p_height, int p_fullscreen, int p_hidpi);
 
 // Display Virtual Keyboard
 extern int godot_js_display_vk_available();

platform/javascript/js/libs/library_godot_display.js

@@ -28,224 +28,9 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
-/*
- * Display Server listeners.
- * Keeps track of registered event listeners so it can remove them on shutdown.
- */
-const GodotDisplayListeners = {
-	$GodotDisplayListeners__deps: ['$GodotOS'],
-	$GodotDisplayListeners__postset: 'GodotOS.atexit(function(resolve, reject) { GodotDisplayListeners.clear(); resolve(); });',
-	$GodotDisplayListeners: {
-		handlers: [],
-
-		has: function (target, event, method, capture) {
-			return GodotDisplayListeners.handlers.findIndex(function (e) {
-				return e.target === target && e.event === event && e.method === method && e.capture === capture;
-			}) !== -1;
-		},
-
-		add: function (target, event, method, capture) {
-			if (GodotDisplayListeners.has(target, event, method, capture)) {
-				return;
-			}
-			function Handler(p_target, p_event, p_method, p_capture) {
-				this.target = p_target;
-				this.event = p_event;
-				this.method = p_method;
-				this.capture = p_capture;
-			}
-			GodotDisplayListeners.handlers.push(new Handler(target, event, method, capture));
-			target.addEventListener(event, method, capture);
-		},
-
-		clear: function () {
-			GodotDisplayListeners.handlers.forEach(function (h) {
-				h.target.removeEventListener(h.event, h.method, h.capture);
-			});
-			GodotDisplayListeners.handlers.length = 0;
-		},
-	},
-};
-mergeInto(LibraryManager.library, GodotDisplayListeners);
-
-/*
- * Drag and drop handler.
- * This is pretty big, but basically detect dropped files on GodotConfig.canvas,
- * process them one by one (recursively for directories), and copies them to
- * the temporary FS path '/tmp/drop-[random]/' so it can be emitted as a godot
- * event (that requires a string array of paths).
- *
- * NOTE: The temporary files are removed after the callback. This means that
- * deferred callbacks won't be able to access the files.
- */
-const GodotDisplayDragDrop = {
-	$GodotDisplayDragDrop__deps: ['$FS', '$GodotFS'],
-	$GodotDisplayDragDrop: {
-		promises: [],
-		pending_files: [],
-
-		add_entry: function (entry) {
-			if (entry.isDirectory) {
-				GodotDisplayDragDrop.add_dir(entry);
-			} else if (entry.isFile) {
-				GodotDisplayDragDrop.add_file(entry);
-			} else {
-				GodotRuntime.error('Unrecognized entry...', entry);
-			}
-		},
-
-		add_dir: function (entry) {
-			GodotDisplayDragDrop.promises.push(new Promise(function (resolve, reject) {
-				const reader = entry.createReader();
-				reader.readEntries(function (entries) {
-					for (let i = 0; i < entries.length; i++) {
-						GodotDisplayDragDrop.add_entry(entries[i]);
-					}
-					resolve();
-				});
-			}));
-		},
-
-		add_file: function (entry) {
-			GodotDisplayDragDrop.promises.push(new Promise(function (resolve, reject) {
-				entry.file(function (file) {
-					const reader = new FileReader();
-					reader.onload = function () {
-						const f = {
-							'path': file.relativePath || file.webkitRelativePath,
-							'name': file.name,
-							'type': file.type,
-							'size': file.size,
-							'data': reader.result,
-						};
-						if (!f['path']) {
-							f['path'] = f['name'];
-						}
-						GodotDisplayDragDrop.pending_files.push(f);
-						resolve();
-					};
-					reader.onerror = function () {
-						GodotRuntime.print('Error reading file');
-						reject();
-					};
-					reader.readAsArrayBuffer(file);
-				}, function (err) {
-					GodotRuntime.print('Error!');
-					reject();
-				});
-			}));
-		},
-
-		process: function (resolve, reject) {
-			if (GodotDisplayDragDrop.promises.length === 0) {
-				resolve();
-				return;
-			}
-			GodotDisplayDragDrop.promises.pop().then(function () {
-				setTimeout(function () {
-					GodotDisplayDragDrop.process(resolve, reject);
-				}, 0);
-			});
-		},
-
-		_process_event: function (ev, callback) {
-			ev.preventDefault();
-			if (ev.dataTransfer.items) {
-				// Use DataTransferItemList interface to access the file(s)
-				for (let i = 0; i < ev.dataTransfer.items.length; i++) {
-					const item = ev.dataTransfer.items[i];
-					let entry = null;
-					if ('getAsEntry' in item) {
-						entry = item.getAsEntry();
-					} else if ('webkitGetAsEntry' in item) {
-						entry = item.webkitGetAsEntry();
-					}
-					if (entry) {
-						GodotDisplayDragDrop.add_entry(entry);
-					}
-				}
-			} else {
-				GodotRuntime.error('File upload not supported');
-			}
-			new Promise(GodotDisplayDragDrop.process).then(function () {
-				const DROP = `/tmp/drop-${parseInt(Math.random() * (1 << 30), 10)}/`;
-				const drops = [];
-				const files = [];
-				FS.mkdir(DROP);
-				GodotDisplayDragDrop.pending_files.forEach((elem) => {
-					const path = elem['path'];
-					GodotFS.copy_to_fs(DROP + path, elem['data']);
-					let idx = path.indexOf('/');
-					if (idx === -1) {
-						// Root file
-						drops.push(DROP + path);
-					} else {
-						// Subdir
-						const sub = path.substr(0, idx);
-						idx = sub.indexOf('/');
-						if (idx < 0 && drops.indexOf(DROP + sub) === -1) {
-							drops.push(DROP + sub);
-						}
-					}
-					files.push(DROP + path);
-				});
-				GodotDisplayDragDrop.promises = [];
-				GodotDisplayDragDrop.pending_files = [];
-				callback(drops);
-				if (GodotConfig.persistent_drops) {
-					// Delay removal at exit.
-					GodotOS.atexit(function (resolve, reject) {
-						GodotDisplayDragDrop.remove_drop(files, DROP);
-						resolve();
-					});
-				} else {
-					GodotDisplayDragDrop.remove_drop(files, DROP);
-				}
-			});
-		},
-
-		remove_drop: function (files, drop_path) {
-			const dirs = [drop_path.substr(0, drop_path.length - 1)];
-			// Remove temporary files
-			files.forEach(function (file) {
-				FS.unlink(file);
-				let dir = file.replace(drop_path, '');
-				let idx = dir.lastIndexOf('/');
-				while (idx > 0) {
-					dir = dir.substr(0, idx);
-					if (dirs.indexOf(drop_path + dir) === -1) {
-						dirs.push(drop_path + dir);
-					}
-					idx = dir.lastIndexOf('/');
-				}
-			});
-			// Remove dirs.
-			dirs.sort(function (a, b) {
-				const al = (a.match(/\//g) || []).length;
-				const bl = (b.match(/\//g) || []).length;
-				if (al > bl) {
-					return -1;
-				} else if (al < bl) {
-					return 1;
-				}
-				return 0;
-			}).forEach(function (dir) {
-				FS.rmdir(dir);
-			});
-		},
-
-		handler: function (callback) {
-			return function (ev) {
-				GodotDisplayDragDrop._process_event(ev, callback);
-			};
-		},
-	},
-};
-mergeInto(LibraryManager.library, GodotDisplayDragDrop);
-
 const GodotDisplayVK = {
 
-	$GodotDisplayVK__deps: ['$GodotRuntime', '$GodotConfig', '$GodotDisplayListeners'],
+	$GodotDisplayVK__deps: ['$GodotRuntime', '$GodotConfig', '$GodotEventListeners'],
 	$GodotDisplayVK__postset: 'GodotOS.atexit(function(resolve, reject) { GodotDisplayVK.clear(); resolve(); });',
 	$GodotDisplayVK: {
 		textinput: null,
@@ -271,12 +56,12 @@ const GodotDisplayVK = {
 				elem.style.outline = 'none';
 				elem.readonly = true;
 				elem.disabled = true;
-				GodotDisplayListeners.add(elem, 'input', function (evt) {
+				GodotEventListeners.add(elem, 'input', function (evt) {
 					const c_str = GodotRuntime.allocString(elem.value);
 					input_cb(c_str, elem.selectionEnd);
 					GodotRuntime.free(c_str);
 				}, false);
-				GodotDisplayListeners.add(elem, 'blur', function (evt) {
+				GodotEventListeners.add(elem, 'blur', function (evt) {
 					elem.style.display = 'none';
 					elem.readonly = true;
 					elem.disabled = true;
@@ -376,136 +161,23 @@ const GodotDisplayCursor = {
 				delete GodotDisplayCursor.cursors[key];
 			});
 		},
-	},
-};
-mergeInto(LibraryManager.library, GodotDisplayCursor);
-
-/*
- * Display Gamepad API helper.
- */
-const GodotDisplayGamepads = {
-	$GodotDisplayGamepads__deps: ['$GodotRuntime', '$GodotDisplayListeners'],
-	$GodotDisplayGamepads: {
-		samples: [],
-
-		get_pads: function () {
-			try {
-				// Will throw in iframe when permission is denied.
-				// Will throw/warn in the future for insecure contexts.
-				// See https://github.com/w3c/gamepad/pull/120
-				const pads = navigator.getGamepads();
-				if (pads) {
-					return pads;
-				}
-				return [];
-			} catch (e) {
-				return [];
-			}
-		},
-
-		get_samples: function () {
-			return GodotDisplayGamepads.samples;
-		},
-
-		get_sample: function (index) {
-			const samples = GodotDisplayGamepads.samples;
-			return index < samples.length ? samples[index] : null;
-		},
-
-		sample: function () {
-			const pads = GodotDisplayGamepads.get_pads();
-			const samples = [];
-			for (let i = 0; i < pads.length; i++) {
-				const pad = pads[i];
-				if (!pad) {
-					samples.push(null);
-					continue;
-				}
-				const s = {
-					standard: pad.mapping === 'standard',
-					buttons: [],
-					axes: [],
-					connected: pad.connected,
-				};
-				for (let b = 0; b < pad.buttons.length; b++) {
-					s.buttons.push(pad.buttons[b].value);
-				}
-				for (let a = 0; a < pad.axes.length; a++) {
-					s.axes.push(pad.axes[a]);
-				}
-				samples.push(s);
+		lockPointer: function () {
+			const canvas = GodotConfig.canvas;
+			if (canvas.requestPointerLock) {
+				canvas.requestPointerLock();
 			}
-			GodotDisplayGamepads.samples = samples;
 		},
-
-		init: function (onchange) {
-			GodotDisplayListeners.samples = [];
-			function add(pad) {
-				const guid = GodotDisplayGamepads.get_guid(pad);
-				const c_id = GodotRuntime.allocString(pad.id);
-				const c_guid = GodotRuntime.allocString(guid);
-				onchange(pad.index, 1, c_id, c_guid);
-				GodotRuntime.free(c_id);
-				GodotRuntime.free(c_guid);
+		releasePointer: function () {
+			if (document.exitPointerLock) {
+				document.exitPointerLock();
 			}
-			const pads = GodotDisplayGamepads.get_pads();
-			for (let i = 0; i < pads.length; i++) {
-				// Might be reserved space.
-				if (pads[i]) {
-					add(pads[i]);
-				}
-			}
-			GodotDisplayListeners.add(window, 'gamepadconnected', function (evt) {
-				add(evt.gamepad);
-			}, false);
-			GodotDisplayListeners.add(window, 'gamepaddisconnected', function (evt) {
-				onchange(evt.gamepad.index, 0);
-			}, false);
 		},
-
-		get_guid: function (pad) {
-			if (pad.mapping) {
-				return pad.mapping;
-			}
-			const ua = navigator.userAgent;
-			let os = 'Unknown';
-			if (ua.indexOf('Android') >= 0) {
-				os = 'Android';
-			} else if (ua.indexOf('Linux') >= 0) {
-				os = 'Linux';
-			} else if (ua.indexOf('iPhone') >= 0) {
-				os = 'iOS';
-			} else if (ua.indexOf('Macintosh') >= 0) {
-				// Updated iPads will fall into this category.
-				os = 'MacOSX';
-			} else if (ua.indexOf('Windows') >= 0) {
-				os = 'Windows';
-			}
-
-			const id = pad.id;
-			// Chrom* style: NAME (Vendor: xxxx Product: xxxx)
-			const exp1 = /vendor: ([0-9a-f]{4}) product: ([0-9a-f]{4})/i;
-			// Firefox/Safari style (safari may remove leading zeores)
-			const exp2 = /^([0-9a-f]+)-([0-9a-f]+)-/i;
-			let vendor = '';
-			let product = '';
-			if (exp1.test(id)) {
-				const match = exp1.exec(id);
-				vendor = match[1].padStart(4, '0');
-				product = match[2].padStart(4, '0');
-			} else if (exp2.test(id)) {
-				const match = exp2.exec(id);
-				vendor = match[1].padStart(4, '0');
-				product = match[2].padStart(4, '0');
-			}
-			if (!vendor || !product) {
-				return `${os}Unknown`;
-			}
-			return os + vendor + product;
+		isPointerLocked: function () {
+			return document.pointerLockElement === GodotConfig.canvas;
 		},
 	},
 };
-mergeInto(LibraryManager.library, GodotDisplayGamepads);
+mergeInto(LibraryManager.library, GodotDisplayCursor);
 
 const GodotDisplayScreen = {
 	$GodotDisplayScreen__deps: ['$GodotConfig', '$GodotOS', '$GL', 'emscripten_webgl_get_current_context'],
@@ -622,7 +294,7 @@ mergeInto(LibraryManager.library, GodotDisplayScreen);
  * Exposes all the functions needed by DisplayServer implementation.
  */
 const GodotDisplay = {
-	$GodotDisplay__deps: ['$GodotConfig', '$GodotRuntime', '$GodotDisplayCursor', '$GodotDisplayListeners', '$GodotDisplayDragDrop', '$GodotDisplayGamepads', '$GodotDisplayScreen', '$GodotDisplayVK'],
+	$GodotDisplay__deps: ['$GodotConfig', '$GodotRuntime', '$GodotDisplayCursor', '$GodotEventListeners', '$GodotDisplayScreen', '$GodotDisplayVK'],
 	$GodotDisplay: {
 		window_icon: '',
 		findDPI: function () {
@@ -710,15 +382,6 @@ const GodotDisplay = {
 		GodotRuntime.setHeapValue(p_height, GodotConfig.canvas.height, 'i32');
 	},
 
-	godot_js_display_compute_position: function (x, y, r_x, r_y) {
-		const canvas = GodotConfig.canvas;
-		const rect = canvas.getBoundingClientRect();
-		const rw = canvas.width / rect.width;
-		const rh = canvas.height / rect.height;
-		GodotRuntime.setHeapValue(r_x, (x - rect.x) * rw, 'i32');
-		GodotRuntime.setHeapValue(r_y, (y - rect.y) * rh, 'i32');
-	},
-
 	godot_js_display_has_webgl__sig: 'ii',
 	godot_js_display_has_webgl: function (p_version) {
 		if (p_version !== 1 && p_version !== 2) {
@@ -859,60 +522,64 @@ const GodotDisplay = {
 		}
 	},
 
+	godot_js_display_cursor_lock_set__sig: 'vi',
+	godot_js_display_cursor_lock_set: function (p_lock) {
+		if (p_lock) {
+			GodotDisplayCursor.lockPointer();
+		} else {
+			GodotDisplayCursor.releasePointer();
+		}
+	},
+
+	godot_js_display_cursor_is_locked__sig: 'i',
+	godot_js_display_cursor_is_locked: function () {
+		return GodotDisplayCursor.isPointerLocked() ? 1 : 0;
+	},
+
 	/*
 	 * Listeners
 	 */
-	godot_js_display_notification_cb__sig: 'viiiii',
-	godot_js_display_notification_cb: function (callback, p_enter, p_exit, p_in, p_out) {
+	godot_js_display_fullscreen_cb__sig: 'vi',
+	godot_js_display_fullscreen_cb: function (callback) {
 		const canvas = GodotConfig.canvas;
 		const func = GodotRuntime.get_func(callback);
-		const notif = [p_enter, p_exit, p_in, p_out];
-		['mouseover', 'mouseleave', 'focus', 'blur'].forEach(function (evt_name, idx) {
-			GodotDisplayListeners.add(canvas, evt_name, function () {
-				func(notif[idx]);
-			}, true);
-		});
+		function change_cb(evt) {
+			if (evt.target === canvas) {
+				func(GodotDisplayScreen.isFullscreen());
+			}
+		}
+		GodotEventListeners.add(document, 'fullscreenchange', change_cb, false);
+		GodotEventListeners.add(document, 'mozfullscreenchange', change_cb, false);
+		GodotEventListeners.add(document, 'webkitfullscreenchange', change_cb, false);
 	},
 
-	godot_js_display_paste_cb__sig: 'vi',
-	godot_js_display_paste_cb: function (callback) {
+	godot_js_display_window_blur_cb__sig: 'vi',
+	godot_js_display_window_blur_cb: function (callback) {
 		const func = GodotRuntime.get_func(callback);
-		GodotDisplayListeners.add(window, 'paste', function (evt) {
-			const text = evt.clipboardData.getData('text');
-			const ptr = GodotRuntime.allocString(text);
-			func(ptr);
-			GodotRuntime.free(ptr);
+		GodotEventListeners.add(window, 'blur', function () {
+			func();
 		}, false);
 	},
 
-	godot_js_display_drop_files_cb__sig: 'vi',
-	godot_js_display_drop_files_cb: function (callback) {
-		const func = GodotRuntime.get_func(callback);
-		const dropFiles = function (files) {
-			const args = files || [];
-			if (!args.length) {
-				return;
-			}
-			const argc = args.length;
-			const argv = GodotRuntime.allocStringArray(args);
-			func(argv, argc);
-			GodotRuntime.freeStringArray(argv, argc);
-		};
+	godot_js_display_notification_cb__sig: 'viiiii',
+	godot_js_display_notification_cb: function (callback, p_enter, p_exit, p_in, p_out) {
 		const canvas = GodotConfig.canvas;
-		GodotDisplayListeners.add(canvas, 'dragover', function (ev) {
-			// Prevent default behavior (which would try to open the file(s))
-			ev.preventDefault();
-		}, false);
-		GodotDisplayListeners.add(canvas, 'drop', GodotDisplayDragDrop.handler(dropFiles));
+		const func = GodotRuntime.get_func(callback);
+		const notif = [p_enter, p_exit, p_in, p_out];
+		['mouseover', 'mouseleave', 'focus', 'blur'].forEach(function (evt_name, idx) {
+			GodotEventListeners.add(canvas, evt_name, function () {
+				func(notif[idx]);
+			}, true);
+		});
 	},
 
 	godot_js_display_setup_canvas__sig: 'viiii',
 	godot_js_display_setup_canvas: function (p_width, p_height, p_fullscreen, p_hidpi) {
 		const canvas = GodotConfig.canvas;
-		GodotDisplayListeners.add(canvas, 'contextmenu', function (ev) {
+		GodotEventListeners.add(canvas, 'contextmenu', function (ev) {
 			ev.preventDefault();
 		}, false);
-		GodotDisplayListeners.add(canvas, 'webglcontextlost', function (ev) {
+		GodotEventListeners.add(canvas, 'webglcontextlost', function (ev) {
 			alert('WebGL context lost, please reload the page'); // eslint-disable-line no-alert
 			ev.preventDefault();
 		}, false);
@@ -965,49 +632,6 @@ const GodotDisplay = {
 			GodotDisplayVK.init(input_cb);
 		}
 	},
-
-	/*
-	 * Gamepads
-	 */
-	godot_js_display_gamepad_cb__sig: 'vi',
-	godot_js_display_gamepad_cb: function (change_cb) {
-		const onchange = GodotRuntime.get_func(change_cb);
-		GodotDisplayGamepads.init(onchange);
-	},
-
-	godot_js_display_gamepad_sample_count__sig: 'i',
-	godot_js_display_gamepad_sample_count: function () {
-		return GodotDisplayGamepads.get_samples().length;
-	},
-
-	godot_js_display_gamepad_sample__sig: 'i',
-	godot_js_display_gamepad_sample: function () {
-		GodotDisplayGamepads.sample();
-		return 0;
-	},
-
-	godot_js_display_gamepad_sample_get__sig: 'iiiiiii',
-	godot_js_display_gamepad_sample_get: function (p_index, r_btns, r_btns_num, r_axes, r_axes_num, r_standard) {
-		const sample = GodotDisplayGamepads.get_sample(p_index);
-		if (!sample || !sample.connected) {
-			return 1;
-		}
-		const btns = sample.buttons;
-		const btns_len = btns.length < 16 ? btns.length : 16;
-		for (let i = 0; i < btns_len; i++) {
-			GodotRuntime.setHeapValue(r_btns + (i << 2), btns[i], 'float');
-		}
-		GodotRuntime.setHeapValue(r_btns_num, btns_len, 'i32');
-		const axes = sample.axes;
-		const axes_len = axes.length < 10 ? axes.length : 10;
-		for (let i = 0; i < axes_len; i++) {
-			GodotRuntime.setHeapValue(r_axes + (i << 2), axes[i], 'float');
-		}
-		GodotRuntime.setHeapValue(r_axes_num, axes_len, 'i32');
-		const is_standard = sample.standard ? 1 : 0;
-		GodotRuntime.setHeapValue(r_standard, is_standard, 'i32');
-		return 0;
-	},
 };
 
 autoAddDeps(GodotDisplay, '$GodotDisplay');

platform/javascript/js/libs/library_godot_input.js

@@ -0,0 +1,526 @@
+/*************************************************************************/
+/*  library_godot_input.js                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+/*
+ * Gamepad API helper.
+ */
+const GodotInputGamepads = {
+	$GodotInputGamepads__deps: ['$GodotRuntime', '$GodotEventListeners'],
+	$GodotInputGamepads: {
+		samples: [],
+
+		get_pads: function () {
+			try {
+				// Will throw in iframe when permission is denied.
+				// Will throw/warn in the future for insecure contexts.
+				// See https://github.com/w3c/gamepad/pull/120
+				const pads = navigator.getGamepads();
+				if (pads) {
+					return pads;
+				}
+				return [];
+			} catch (e) {
+				return [];
+			}
+		},
+
+		get_samples: function () {
+			return GodotInputGamepads.samples;
+		},
+
+		get_sample: function (index) {
+			const samples = GodotInputGamepads.samples;
+			return index < samples.length ? samples[index] : null;
+		},
+
+		sample: function () {
+			const pads = GodotInputGamepads.get_pads();
+			const samples = [];
+			for (let i = 0; i < pads.length; i++) {
+				const pad = pads[i];
+				if (!pad) {
+					samples.push(null);
+					continue;
+				}
+				const s = {
+					standard: pad.mapping === 'standard',
+					buttons: [],
+					axes: [],
+					connected: pad.connected,
+				};
+				for (let b = 0; b < pad.buttons.length; b++) {
+					s.buttons.push(pad.buttons[b].value);
+				}
+				for (let a = 0; a < pad.axes.length; a++) {
+					s.axes.push(pad.axes[a]);
+				}
+				samples.push(s);
+			}
+			GodotInputGamepads.samples = samples;
+		},
+
+		init: function (onchange) {
+			GodotEventListeners.samples = [];
+			function add(pad) {
+				const guid = GodotInputGamepads.get_guid(pad);
+				const c_id = GodotRuntime.allocString(pad.id);
+				const c_guid = GodotRuntime.allocString(guid);
+				onchange(pad.index, 1, c_id, c_guid);
+				GodotRuntime.free(c_id);
+				GodotRuntime.free(c_guid);
+			}
+			const pads = GodotInputGamepads.get_pads();
+			for (let i = 0; i < pads.length; i++) {
+				// Might be reserved space.
+				if (pads[i]) {
+					add(pads[i]);
+				}
+			}
+			GodotEventListeners.add(window, 'gamepadconnected', function (evt) {
+				add(evt.gamepad);
+			}, false);
+			GodotEventListeners.add(window, 'gamepaddisconnected', function (evt) {
+				onchange(evt.gamepad.index, 0);
+			}, false);
+		},
+
+		get_guid: function (pad) {
+			if (pad.mapping) {
+				return pad.mapping;
+			}
+			const ua = navigator.userAgent;
+			let os = 'Unknown';
+			if (ua.indexOf('Android') >= 0) {
+				os = 'Android';
+			} else if (ua.indexOf('Linux') >= 0) {
+				os = 'Linux';
+			} else if (ua.indexOf('iPhone') >= 0) {
+				os = 'iOS';
+			} else if (ua.indexOf('Macintosh') >= 0) {
+				// Updated iPads will fall into this category.
+				os = 'MacOSX';
+			} else if (ua.indexOf('Windows') >= 0) {
+				os = 'Windows';
+			}
+
+			const id = pad.id;
+			// Chrom* style: NAME (Vendor: xxxx Product: xxxx)
+			const exp1 = /vendor: ([0-9a-f]{4}) product: ([0-9a-f]{4})/i;
+			// Firefox/Safari style (safari may remove leading zeores)
+			const exp2 = /^([0-9a-f]+)-([0-9a-f]+)-/i;
+			let vendor = '';
+			let product = '';
+			if (exp1.test(id)) {
+				const match = exp1.exec(id);
+				vendor = match[1].padStart(4, '0');
+				product = match[2].padStart(4, '0');
+			} else if (exp2.test(id)) {
+				const match = exp2.exec(id);
+				vendor = match[1].padStart(4, '0');
+				product = match[2].padStart(4, '0');
+			}
+			if (!vendor || !product) {
+				return `${os}Unknown`;
+			}
+			return os + vendor + product;
+		},
+	},
+};
+mergeInto(LibraryManager.library, GodotInputGamepads);
+
+/*
+ * Drag and drop helper.
+ * This is pretty big, but basically detect dropped files on GodotConfig.canvas,
+ * process them one by one (recursively for directories), and copies them to
+ * the temporary FS path '/tmp/drop-[random]/' so it can be emitted as a godot
+ * event (that requires a string array of paths).
+ *
+ * NOTE: The temporary files are removed after the callback. This means that
+ * deferred callbacks won't be able to access the files.
+ */
+const GodotInputDragDrop = {
+	$GodotInputDragDrop__deps: ['$FS', '$GodotFS'],
+	$GodotInputDragDrop: {
+		promises: [],
+		pending_files: [],
+
+		add_entry: function (entry) {
+			if (entry.isDirectory) {
+				GodotInputDragDrop.add_dir(entry);
+			} else if (entry.isFile) {
+				GodotInputDragDrop.add_file(entry);
+			} else {
+				GodotRuntime.error('Unrecognized entry...', entry);
+			}
+		},
+
+		add_dir: function (entry) {
+			GodotInputDragDrop.promises.push(new Promise(function (resolve, reject) {
+				const reader = entry.createReader();
+				reader.readEntries(function (entries) {
+					for (let i = 0; i < entries.length; i++) {
+						GodotInputDragDrop.add_entry(entries[i]);
+					}
+					resolve();
+				});
+			}));
+		},
+
+		add_file: function (entry) {
+			GodotInputDragDrop.promises.push(new Promise(function (resolve, reject) {
+				entry.file(function (file) {
+					const reader = new FileReader();
+					reader.onload = function () {
+						const f = {
+							'path': file.relativePath || file.webkitRelativePath,
+							'name': file.name,
+							'type': file.type,
+							'size': file.size,
+							'data': reader.result,
+						};
+						if (!f['path']) {
+							f['path'] = f['name'];
+						}
+						GodotInputDragDrop.pending_files.push(f);
+						resolve();
+					};
+					reader.onerror = function () {
+						GodotRuntime.print('Error reading file');
+						reject();
+					};
+					reader.readAsArrayBuffer(file);
+				}, function (err) {
+					GodotRuntime.print('Error!');
+					reject();
+				});
+			}));
+		},
+
+		process: function (resolve, reject) {
+			if (GodotInputDragDrop.promises.length === 0) {
+				resolve();
+				return;
+			}
+			GodotInputDragDrop.promises.pop().then(function () {
+				setTimeout(function () {
+					GodotInputDragDrop.process(resolve, reject);
+				}, 0);
+			});
+		},
+
+		_process_event: function (ev, callback) {
+			ev.preventDefault();
+			if (ev.dataTransfer.items) {
+				// Use DataTransferItemList interface to access the file(s)
+				for (let i = 0; i < ev.dataTransfer.items.length; i++) {
+					const item = ev.dataTransfer.items[i];
+					let entry = null;
+					if ('getAsEntry' in item) {
+						entry = item.getAsEntry();
+					} else if ('webkitGetAsEntry' in item) {
+						entry = item.webkitGetAsEntry();
+					}
+					if (entry) {
+						GodotInputDragDrop.add_entry(entry);
+					}
+				}
+			} else {
+				GodotRuntime.error('File upload not supported');
+			}
+			new Promise(GodotInputDragDrop.process).then(function () {
+				const DROP = `/tmp/drop-${parseInt(Math.random() * (1 << 30), 10)}/`;
+				const drops = [];
+				const files = [];
+				FS.mkdir(DROP);
+				GodotInputDragDrop.pending_files.forEach((elem) => {
+					const path = elem['path'];
+					GodotFS.copy_to_fs(DROP + path, elem['data']);
+					let idx = path.indexOf('/');
+					if (idx === -1) {
+						// Root file
+						drops.push(DROP + path);
+					} else {
+						// Subdir
+						const sub = path.substr(0, idx);
+						idx = sub.indexOf('/');
+						if (idx < 0 && drops.indexOf(DROP + sub) === -1) {
+							drops.push(DROP + sub);
+						}
+					}
+					files.push(DROP + path);
+				});
+				GodotInputDragDrop.promises = [];
+				GodotInputDragDrop.pending_files = [];
+				callback(drops);
+				if (GodotConfig.persistent_drops) {
+					// Delay removal at exit.
+					GodotOS.atexit(function (resolve, reject) {
+						GodotInputDragDrop.remove_drop(files, DROP);
+						resolve();
+					});
+				} else {
+					GodotInputDragDrop.remove_drop(files, DROP);
+				}
+			});
+		},
+
+		remove_drop: function (files, drop_path) {
+			const dirs = [drop_path.substr(0, drop_path.length - 1)];
+			// Remove temporary files
+			files.forEach(function (file) {
+				FS.unlink(file);
+				let dir = file.replace(drop_path, '');
+				let idx = dir.lastIndexOf('/');
+				while (idx > 0) {
+					dir = dir.substr(0, idx);
+					if (dirs.indexOf(drop_path + dir) === -1) {
+						dirs.push(drop_path + dir);
+					}
+					idx = dir.lastIndexOf('/');
+				}
+			});
+			// Remove dirs.
+			dirs.sort(function (a, b) {
+				const al = (a.match(/\//g) || []).length;
+				const bl = (b.match(/\//g) || []).length;
+				if (al > bl) {
+					return -1;
+				} else if (al < bl) {
+					return 1;
+				}
+				return 0;
+			}).forEach(function (dir) {
+				FS.rmdir(dir);
+			});
+		},
+
+		handler: function (callback) {
+			return function (ev) {
+				GodotInputDragDrop._process_event(ev, callback);
+			};
+		},
+	},
+};
+mergeInto(LibraryManager.library, GodotInputDragDrop);
+
+/*
+ * Godot exposed input functions.
+ */
+const GodotInput = {
+	$GodotInput__deps: ['$GodotRuntime', '$GodotConfig', '$GodotEventListeners', '$GodotInputGamepads', '$GodotInputDragDrop'],
+	$GodotInput: {
+		getModifiers: function (evt) {
+			return (evt.shiftKey + 0) + ((evt.altKey + 0) << 1) + ((evt.ctrlKey + 0) << 2) + ((evt.metaKey + 0) << 3);
+		},
+		computePosition: function (evt, rect) {
+			const canvas = GodotConfig.canvas;
+			const rw = canvas.width / rect.width;
+			const rh = canvas.height / rect.height;
+			const x = (evt.clientX - rect.x) * rw;
+			const y = (evt.clientY - rect.y) * rh;
+			return [x, y];
+		},
+	},
+
+	/*
+	 * Mouse API
+	 */
+	godot_js_input_mouse_move_cb__sig: 'vi',
+	godot_js_input_mouse_move_cb: function (callback) {
+		const func = GodotRuntime.get_func(callback);
+		const canvas = GodotConfig.canvas;
+		function move_cb(evt) {
+			const rect = canvas.getBoundingClientRect();
+			const pos = GodotInput.computePosition(evt, rect);
+			// Scale movement
+			const rw = canvas.width / rect.width;
+			const rh = canvas.height / rect.height;
+			const rel_pos_x = evt.movementX * rw;
+			const rel_pos_y = evt.movementY * rh;
+			const modifiers = GodotInput.getModifiers(evt);
+			func(pos[0], pos[1], rel_pos_x, rel_pos_y, modifiers);
+		}
+		GodotEventListeners.add(window, 'mousemove', move_cb, false);
+	},
+
+	godot_js_input_mouse_wheel_cb__sig: 'vi',
+	godot_js_input_mouse_wheel_cb: function (callback) {
+		const func = GodotRuntime.get_func(callback);
+		function wheel_cb(evt) {
+			if (func(evt['deltaX'] || 0, evt['deltaY'] || 0)) {
+				evt.preventDefault();
+			}
+		}
+		GodotEventListeners.add(GodotConfig.canvas, 'wheel', wheel_cb, false);
+	},
+
+	godot_js_input_mouse_button_cb__sig: 'vi',
+	godot_js_input_mouse_button_cb: function (callback) {
+		const func = GodotRuntime.get_func(callback);
+		const canvas = GodotConfig.canvas;
+		function button_cb(p_pressed, evt) {
+			const rect = canvas.getBoundingClientRect();
+			const pos = GodotInput.computePosition(evt, rect);
+			const modifiers = GodotInput.getModifiers(evt);
+			if (func(p_pressed, evt.button, pos[0], pos[1], modifiers)) {
+				evt.preventDefault();
+			}
+		}
+		GodotEventListeners.add(canvas, 'mousedown', button_cb.bind(null, 1), false);
+		GodotEventListeners.add(window, 'mouseup', button_cb.bind(null, 0), false);
+	},
+
+	/*
+	 * Touch API
+	 */
+	godot_js_input_touch_cb__sig: 'viii',
+	godot_js_input_touch_cb: function (callback, ids, coords) {
+		const func = GodotRuntime.get_func(callback);
+		const canvas = GodotConfig.canvas;
+		function touch_cb(type, evt) {
+			const rect = canvas.getBoundingClientRect();
+			const touches = evt.changedTouches;
+			for (let i = 0; i < touches.length; i++) {
+				const touch = touches[i];
+				const pos = GodotInput.computePosition(touch, rect);
+				GodotRuntime.setHeapValue(coords + (i * 2), pos[0], 'double');
+				GodotRuntime.setHeapValue(coords + (i * 2 + 8), pos[1], 'double');
+				GodotRuntime.setHeapValue(ids + i, touch.identifier, 'i32');
+			}
+			func(type, touches.length);
+			if (evt.cancelable) {
+				evt.preventDefault();
+			}
+		}
+		GodotEventListeners.add(canvas, 'touchstart', touch_cb.bind(null, 0), false);
+		GodotEventListeners.add(canvas, 'touchend', touch_cb.bind(null, 1), false);
+		GodotEventListeners.add(canvas, 'touchcancel', touch_cb.bind(null, 1), false);
+		GodotEventListeners.add(canvas, 'touchmove', touch_cb.bind(null, 2), false);
+	},
+
+	/*
+	 * Key API
+	 */
+	godot_js_input_key_cb__sig: 'viii',
+	godot_js_input_key_cb: function (callback, code, key) {
+		const func = GodotRuntime.get_func(callback);
+		function key_cb(pressed, evt) {
+			const modifiers = GodotInput.getModifiers(evt);
+			GodotRuntime.stringToHeap(evt.code, code, 32);
+			GodotRuntime.stringToHeap(evt.key, key, 32);
+			func(pressed, evt.repeat, modifiers);
+			evt.preventDefault();
+		}
+		GodotEventListeners.add(GodotConfig.canvas, 'keydown', key_cb.bind(null, 1), false);
+		GodotEventListeners.add(GodotConfig.canvas, 'keyup', key_cb.bind(null, 0), false);
+	},
+
+	/*
+	 * Gamepad API
+	 */
+	godot_js_input_gamepad_cb__sig: 'vi',
+	godot_js_input_gamepad_cb: function (change_cb) {
+		const onchange = GodotRuntime.get_func(change_cb);
+		GodotInputGamepads.init(onchange);
+	},
+
+	godot_js_input_gamepad_sample_count__sig: 'i',
+	godot_js_input_gamepad_sample_count: function () {
+		return GodotInputGamepads.get_samples().length;
+	},
+
+	godot_js_input_gamepad_sample__sig: 'i',
+	godot_js_input_gamepad_sample: function () {
+		GodotInputGamepads.sample();
+		return 0;
+	},
+
+	godot_js_input_gamepad_sample_get__sig: 'iiiiiii',
+	godot_js_input_gamepad_sample_get: function (p_index, r_btns, r_btns_num, r_axes, r_axes_num, r_standard) {
+		const sample = GodotInputGamepads.get_sample(p_index);
+		if (!sample || !sample.connected) {
+			return 1;
+		}
+		const btns = sample.buttons;
+		const btns_len = btns.length < 16 ? btns.length : 16;
+		for (let i = 0; i < btns_len; i++) {
+			GodotRuntime.setHeapValue(r_btns + (i << 2), btns[i], 'float');
+		}
+		GodotRuntime.setHeapValue(r_btns_num, btns_len, 'i32');
+		const axes = sample.axes;
+		const axes_len = axes.length < 10 ? axes.length : 10;
+		for (let i = 0; i < axes_len; i++) {
+			GodotRuntime.setHeapValue(r_axes + (i << 2), axes[i], 'float');
+		}
+		GodotRuntime.setHeapValue(r_axes_num, axes_len, 'i32');
+		const is_standard = sample.standard ? 1 : 0;
+		GodotRuntime.setHeapValue(r_standard, is_standard, 'i32');
+		return 0;
+	},
+
+	/*
+	 * Drag/Drop API
+	 */
+	godot_js_input_drop_files_cb__sig: 'vi',
+	godot_js_input_drop_files_cb: function (callback) {
+		const func = GodotRuntime.get_func(callback);
+		const dropFiles = function (files) {
+			const args = files || [];
+			if (!args.length) {
+				return;
+			}
+			const argc = args.length;
+			const argv = GodotRuntime.allocStringArray(args);
+			func(argv, argc);
+			GodotRuntime.freeStringArray(argv, argc);
+		};
+		const canvas = GodotConfig.canvas;
+		GodotEventListeners.add(canvas, 'dragover', function (ev) {
+			// Prevent default behavior (which would try to open the file(s))
+			ev.preventDefault();
+		}, false);
+		GodotEventListeners.add(canvas, 'drop', GodotInputDragDrop.handler(dropFiles));
+	},
+
+	/* Paste API */
+	godot_js_input_paste_cb__sig: 'vi',
+	godot_js_input_paste_cb: function (callback) {
+		const func = GodotRuntime.get_func(callback);
+		GodotEventListeners.add(window, 'paste', function (evt) {
+			const text = evt.clipboardData.getData('text');
+			const ptr = GodotRuntime.allocString(text);
+			func(ptr);
+			GodotRuntime.free(ptr);
+		}, false);
+	},
+};
+
+autoAddDeps(GodotInput, '$GodotInput');
+mergeInto(LibraryManager.library, GodotInput);

platform/javascript/js/libs/library_godot_os.js

@@ -328,3 +328,43 @@ const GodotOS = {
 
 autoAddDeps(GodotOS, '$GodotOS');
 mergeInto(LibraryManager.library, GodotOS);
+
+/*
+ * Godot event listeners.
+ * Keeps track of registered event listeners so it can remove them on shutdown.
+ */
+const GodotEventListeners = {
+	$GodotEventListeners__deps: ['$GodotOS'],
+	$GodotEventListeners__postset: 'GodotOS.atexit(function(resolve, reject) { GodotEventListeners.clear(); resolve(); });',
+	$GodotEventListeners: {
+		handlers: [],
+
+		has: function (target, event, method, capture) {
+			return GodotEventListeners.handlers.findIndex(function (e) {
+				return e.target === target && e.event === event && e.method === method && e.capture === capture;
+			}) !== -1;
+		},
+
+		add: function (target, event, method, capture) {
+			if (GodotEventListeners.has(target, event, method, capture)) {
+				return;
+			}
+			function Handler(p_target, p_event, p_method, p_capture) {
+				this.target = p_target;
+				this.event = p_event;
+				this.method = p_method;
+				this.capture = p_capture;
+			}
+			GodotEventListeners.handlers.push(new Handler(target, event, method, capture));
+			target.addEventListener(event, method, capture);
+		},
+
+		clear: function () {
+			GodotEventListeners.handlers.forEach(function (h) {
+				h.target.removeEventListener(h.event, h.method, h.capture);
+			});
+			GodotEventListeners.handlers.length = 0;
+		},
+	},
+};
+mergeInto(LibraryManager.library, GodotEventListeners);