add projbase to repo

1 files changed, 339 insertions, 0 deletions

diff --git a/project-base/src/input.c b/project-base/src/input.c
new file mode 100644
index 0000000..7151c6a
--- /dev/null
+++ b/project-base/src/input.c
@@ -0,0 +1,339 @@
+/* 
+*  BSD 2-Clause “Simplified” License
+*  Copyright (c) 2019, Aldrik Ramaekers, aldrik.ramaekers@protonmail.com
+*  All rights reserved.
+*/
+
+inline bool mouse_interacts_peak(s32 x, s32 y, s32 w, s32 h)
+{
+	// Mouse is in rectangle and mouse has not been clicked yet.
+	vec4 area = renderer->render_get_scissor();
+	bool result = (!_global_mouse.is_hovering_item) && 
+				  (_global_mouse.x >= x && _global_mouse.x <= x+w && _global_mouse.y >= y && _global_mouse.y <= y+h) &&
+				  (_global_mouse.x >= area.x && _global_mouse.x <= area.x+area.w && _global_mouse.y >= area.y && _global_mouse.y <= area.y+area.h);
+	return result;
+}
+
+inline bool mouse_interacts(s32 x, s32 y, s32 w, s32 h)
+{
+	// Mouse is in rectangle and mouse has not been clicked yet.
+	vec4 area = renderer->render_get_scissor();
+	bool result = (!_global_mouse.is_hovering_item) && 
+				  (_global_mouse.x >= x && _global_mouse.x <= x+w && _global_mouse.y >= y && _global_mouse.y <= y+h) &&
+				  (_global_mouse.x >= area.x && _global_mouse.x <= area.x+area.w && _global_mouse.y >= area.y && _global_mouse.y <= area.y+area.h);
+	if (result) _global_mouse.is_hovering_item = true;
+	return result;
+}
+
+inline bool is_left_down()
+{
+	bool result = _global_mouse.left_state & MOUSE_DOWN;
+	if (result) reset_left_down();
+	return result;
+}
+
+inline bool is_left_released()
+{
+	return _global_mouse.left_state & MOUSE_RELEASE;
+}
+
+inline bool is_left_clicked_peak()
+{
+	return _global_mouse.left_state & MOUSE_CLICK && _global_mouse.inside_of_window;
+}
+
+inline bool is_left_clicked()
+{
+	bool result = _global_mouse.left_state & MOUSE_CLICK && _global_mouse.inside_of_window;
+	if (result) reset_left_click();
+	return result;
+}
+
+inline bool is_left_double_clicked()
+{
+	return _global_mouse.left_state & MOUSE_DOUBLE_CLICK;
+}
+
+inline bool is_right_down()
+{
+	return _global_mouse.right_state & MOUSE_DOWN;
+}
+
+inline bool is_right_released()
+{
+	return _global_mouse.right_state & MOUSE_RELEASE;
+}
+
+inline bool is_right_clicked()
+{
+	return _global_mouse.right_state & MOUSE_CLICK;
+}
+
+inline bool keyboard_is_key_down(s16 key)
+{
+	return _global_keyboard.keys[key];
+}
+
+inline bool keyboard_is_key_pressed(s16 key)
+{
+	return _global_keyboard.input_keys[key];
+}
+
+inline void keyboard_set_input_text(char *text)
+{
+	string_copyn(_global_keyboard.input_text, text, MAX_INPUT_LENGTH);
+	u32 len = utf8len(_global_keyboard.input_text);
+	_global_keyboard.cursor = len;
+	_global_keyboard.input_text_len = len;
+}
+
+mouse_input mouse_input_create()
+{
+	mouse_input mouse;
+	mouse.x = -1;
+	mouse.y = -1;
+	mouse.move_x = 0;
+	mouse.move_y = 0;
+	mouse.left_state = 0;
+	mouse.right_state = 0;
+	mouse.is_hovering_item = false;
+	mouse.inside_of_window = false;
+	
+	return mouse;
+}
+
+keyboard_input keyboard_input_create()
+{
+	keyboard_input keyboard;
+	keyboard.modifier_state = 0;
+	keyboard.input_text = mem_alloc(MAX_INPUT_LENGTH);
+	keyboard.input_text[0] = '\0';
+	keyboard.take_input = false;
+	keyboard.cursor = 0;
+	keyboard.input_text_len = 0;
+	keyboard.input_mode = INPUT_FULL;
+	keyboard.has_selection = false;
+	keyboard.selection_begin_offset = 0;
+	keyboard.selection_length = 0;
+	memset(keyboard.keys, 0, MAX_KEYCODE);
+	
+	return keyboard;
+}
+
+void keyboard_set_input_mode(keyboard_input_mode mode)
+{
+	_global_keyboard.input_mode = mode;
+}
+
+inline void keyboard_input_destroy()
+{
+	mem_free(_global_keyboard.input_text);
+}
+
+static void keyboard_handle_input_copy_and_paste(platform_window *window)
+{
+	bool is_lctrl_down = _global_keyboard.keys[KEY_LEFT_CONTROL];
+	
+	if (is_lctrl_down && keyboard_is_key_pressed(KEY_V))
+	{
+		char buf[MAX_INPUT_LENGTH];
+		bool result = platform_get_clipboard(window, buf);
+		
+		if (_global_keyboard.input_mode == INPUT_NUMERIC && !string_is_numeric(buf))
+		{
+			return;
+		}
+		
+		if (_global_keyboard.has_selection)
+		{
+			_global_keyboard.cursor = _global_keyboard.selection_begin_offset;
+			utf8_str_remove_range(_global_keyboard.input_text, _global_keyboard.selection_begin_offset,
+								  _global_keyboard.selection_begin_offset + _global_keyboard.selection_length);
+			_global_keyboard.has_selection = false;
+			_global_keyboard.text_changed = true;
+		}
+		
+		if (result)
+		{
+			s32 len = utf8len(buf);
+			utf8_str_insert_utf8str(_global_keyboard.input_text, _global_keyboard.cursor, buf);
+			
+			_global_keyboard.cursor += len;
+			_global_keyboard.input_text_len += len;
+			_global_keyboard.text_changed = true;
+		}
+	}
+	else if (is_lctrl_down && keyboard_is_key_pressed(KEY_C))
+	{
+		char buffer[MAX_INPUT_LENGTH];
+		utf8_str_copy_range(_global_keyboard.input_text, 
+							_global_keyboard.selection_begin_offset,
+							_global_keyboard.selection_begin_offset+_global_keyboard.selection_length,
+							buffer);
+		
+		if (!string_equals(buffer, ""))
+			platform_set_clipboard(window, buffer);
+	}
+}
+
+void keyboard_handle_input_string(platform_window *window, char *ch)
+{
+	keyboard_handle_input_copy_and_paste(window);
+	
+	bool is_lctrl_down = _global_keyboard.keys[KEY_LEFT_CONTROL];
+	
+	if (ch)
+	{
+		if (string_equals(ch, "\n")) is_lctrl_down = false;
+		
+		if (_global_keyboard.input_text_len < MAX_INPUT_LENGTH && !is_lctrl_down)
+		{
+			if (_global_keyboard.has_selection)
+			{
+				_global_keyboard.cursor = _global_keyboard.selection_begin_offset;
+				utf8_str_remove_range(_global_keyboard.input_text, _global_keyboard.selection_begin_offset,
+									  _global_keyboard.selection_begin_offset + _global_keyboard.selection_length);
+				_global_keyboard.has_selection = false;
+				_global_keyboard.text_changed = true;
+			}
+			
+			if (_global_keyboard.input_text_len)
+			{
+				utf8_str_insert_at(_global_keyboard.input_text, _global_keyboard.cursor, *ch);
+				_global_keyboard.text_changed = true;
+			}
+			else
+			{
+				string_appendn(_global_keyboard.input_text, ch, MAX_INPUT_LENGTH);
+				_global_keyboard.text_changed = true;
+			}
+			
+			_global_keyboard.cursor++;
+			_global_keyboard.input_text_len = utf8len(_global_keyboard.input_text);
+		}
+	}
+	else
+	{
+		bool is_lctrl_down = _global_keyboard.keys[KEY_LEFT_CONTROL];
+		
+		// cursor movement
+		if (keyboard_is_key_down(KEY_LEFT) && _global_keyboard.cursor > 0)
+		{
+			if (is_lctrl_down)
+				_global_keyboard.cursor = 0;
+			else
+				_global_keyboard.cursor--;
+		}
+		if (keyboard_is_key_down(KEY_RIGHT) && _global_keyboard.cursor < _global_keyboard.input_text_len)
+		{
+			if (is_lctrl_down)
+				_global_keyboard.cursor = utf8len(_global_keyboard.input_text);
+			else
+				_global_keyboard.cursor++;
+		}
+	}
+	
+	if (keyboard_is_key_pressed(KEY_X))
+	{
+		bool is_lctrl_down = _global_keyboard.keys[KEY_LEFT_CONTROL];
+		
+		if (is_lctrl_down)
+		{
+			// copy selection
+			if (_global_keyboard.has_selection)
+			{
+				char buffer[MAX_INPUT_LENGTH];
+				utf8_str_copy_range(_global_keyboard.input_text, 
+									_global_keyboard.selection_begin_offset,
+									_global_keyboard.selection_begin_offset+_global_keyboard.selection_length,
+									buffer);
+				
+				if (!string_equals(buffer, ""))
+					platform_set_clipboard(window, buffer);
+			}
+			
+			// delete selection
+			if (_global_keyboard.has_selection)
+			{
+				utf8_str_remove_range(_global_keyboard.input_text, _global_keyboard.selection_begin_offset,
+									  _global_keyboard.selection_begin_offset + _global_keyboard.selection_length);
+				_global_keyboard.has_selection = false;
+				_global_keyboard.text_changed = true;
+				
+				if (_global_keyboard.selection_begin_offset < _global_keyboard.cursor)
+				{
+					_global_keyboard.cursor -= _global_keyboard.selection_length;
+				}
+			}
+			
+			_global_keyboard.input_text_len = utf8len(_global_keyboard.input_text);
+		}
+	}
+	
+	if (keyboard_is_key_down(KEY_BACKSPACE))
+	{
+		_global_keyboard.keys[KEY_BACKSPACE] = false;
+		
+		bool is_lctrl_down = _global_keyboard.keys[KEY_LEFT_CONTROL];
+		
+		if (_global_keyboard.has_selection)
+		{
+			utf8_str_remove_range(_global_keyboard.input_text, _global_keyboard.selection_begin_offset,
+								  _global_keyboard.selection_begin_offset + _global_keyboard.selection_length);
+			_global_keyboard.has_selection = false;
+			_global_keyboard.text_changed = true;
+			
+			if (_global_keyboard.selection_begin_offset < _global_keyboard.cursor)
+			{
+				_global_keyboard.cursor -= _global_keyboard.selection_length;
+			}
+		}
+		else if (is_lctrl_down)
+		{
+			char *iter = _global_keyboard.input_text;
+			s32 index = 0;
+			s32 found_index = 0;
+			utf8_int32_t br;
+			while((iter = utf8codepoint(iter, &br)) && index < _global_keyboard.cursor && br)
+			{
+				index++;
+				if (br == ' ' && index+1 < _global_keyboard.cursor)
+				{
+					found_index = index;
+				}
+			}
+			
+			for (s32 i = found_index; i < _global_keyboard.cursor; i++)
+			{
+				utf8_str_remove_at(_global_keyboard.input_text, found_index);
+			}
+			_global_keyboard.cursor = found_index;
+			_global_keyboard.text_changed = true;
+		}
+		else if (_global_keyboard.cursor > 0)
+		{
+			utf8_str_remove_at(_global_keyboard.input_text, _global_keyboard.cursor-1);
+			
+			_global_keyboard.cursor--;
+			_global_keyboard.text_changed = true;
+		}
+		
+		_global_keyboard.input_text_len = utf8len(_global_keyboard.input_text);
+	}
+}
+
+inline bool keyboard_is_shortcut_down(s32 shortcut_keys[2])
+{
+	return keyboard_is_key_down(shortcut_keys[0]) &&
+		keyboard_is_key_pressed(shortcut_keys[1]);
+}
+
+inline void reset_left_click() {
+	_global_mouse.left_state &= ~MOUSE_CLICK;
+}
+inline void reset_left_down() {
+	_global_mouse.left_state &= ~MOUSE_DOWN;
+}
+inline void reset_right_click() {
+	_global_mouse.right_state &= ~MOUSE_CLICK;
+}
\ No newline at end of file