Merge pull request #51597 from RandomShaper/input_buffering

1 files changed, 91 insertions, 0 deletions

diff --git a/platform/android/android_input_handler.h b/platform/android/android_input_handler.h
new file mode 100644
index 0000000000..2918ca300b
--- /dev/null
+++ b/platform/android/android_input_handler.h
@@ -0,0 +1,91 @@
+/*************************************************************************/
+/*  android_input_handler.h                                              */
+/*************************************************************************/
+/*                       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.                */
+/*************************************************************************/
+
+#ifndef ANDROID_INPUT_HANDLER_H
+#define ANDROID_INPUT_HANDLER_H
+
+#include "core/input/input.h"
+
+// This class encapsulates all the handling of input events that come from the Android UI thread.
+// Remarks:
+// - It's not thread-safe by itself, so its functions must only be called on a single thread, which is the Android UI thread.
+// - Its functions must only call thread-safe methods.
+class AndroidInputHandler {
+public:
+	struct TouchPos {
+		int id = 0;
+		Point2 pos;
+	};
+
+	enum {
+		JOY_EVENT_BUTTON = 0,
+		JOY_EVENT_AXIS = 1,
+		JOY_EVENT_HAT = 2
+	};
+
+	struct JoypadEvent {
+		int device = 0;
+		int type = 0;
+		int index = 0;
+		bool pressed = false;
+		float value = 0;
+		int hat = 0;
+	};
+
+private:
+	bool alt_mem = false;
+	bool shift_mem = false;
+	bool control_mem = false;
+	bool meta_mem = false;
+
+	MouseButton buttons_state = MOUSE_BUTTON_NONE;
+
+	Vector<TouchPos> touch;
+	Point2 hover_prev_pos; // needed to calculate the relative position on hover events
+	Point2 scroll_prev_pos; // needed to calculate the relative position on scroll events
+
+	void _set_key_modifier_state(Ref<InputEventWithModifiers> ev);
+
+	static MouseButton _button_index_from_mask(MouseButton button_mask);
+	static MouseButton _android_button_mask_to_godot_button_mask(int android_button_mask);
+
+	void _wheel_button_click(MouseButton event_buttons_mask, const Ref<InputEventMouseButton> &ev, MouseButton wheel_button, float factor);
+
+public:
+	void process_touch(int p_event, int p_pointer, const Vector<TouchPos> &p_points);
+	void process_hover(int p_type, Point2 p_pos);
+	void process_mouse_event(int input_device, int event_action, int event_android_buttons_mask, Point2 event_pos, float event_vertical_factor = 0, float event_horizontal_factor = 0);
+	void process_double_tap(int event_android_button_mask, Point2 p_pos);
+	void process_scroll(Point2 p_pos);
+	void process_joy_event(JoypadEvent p_event);
+	void process_key_event(int p_keycode, int p_scancode, int p_unicode_char, bool p_pressed);
+};
+
+#endif