initial commit

1 files changed, 237 insertions, 0 deletions

diff --git a/src/input.c b/src/input.c
new file mode 100644
index 0000000..40f7b74
--- /dev/null
+++ b/src/input.c
@@ -0,0 +1,237 @@
+/* 
+*  BSD 2-Clause “Simplified” License
+*  Copyright (c) 2019, Aldrik Ramaekers, aldrik.ramaekers@protonmail.com
+*  All rights reserved.
+*/
+
+inline bool is_left_down(mouse_input *input)
+{
+	return input->left_state & MOUSE_DOWN;
+}
+
+inline bool is_left_released(mouse_input *input)
+{
+	return input->left_state & MOUSE_RELEASE;
+}
+
+inline bool is_left_clicked(mouse_input *input)
+{
+	return input->left_state & MOUSE_CLICK;
+}
+
+inline bool is_left_double_clicked(mouse_input *input)
+{
+	return input->left_state & MOUSE_DOUBLE_CLICK;
+}
+
+inline bool is_right_down(mouse_input *input)
+{
+	return input->right_state & MOUSE_DOWN;
+}
+
+inline bool is_right_released(mouse_input *input)
+{
+	return input->right_state & MOUSE_RELEASE;
+}
+
+inline bool is_right_clicked(mouse_input *input)
+{
+	return input->right_state & MOUSE_CLICK;
+}
+
+inline bool keyboard_is_key_down(keyboard_input *keyboard, s16 key)
+{
+	return keyboard->keys[key];
+}
+
+inline bool keyboard_is_key_pressed(keyboard_input *keyboard, s16 key)
+{
+	return keyboard->input_keys[key];
+}
+
+inline void keyboard_set_input_text(keyboard_input *keyboard, char *text)
+{
+	string_copyn(keyboard->input_text, text, MAX_INPUT_LENGTH);
+	u32 len = utf8len(keyboard->input_text);
+	keyboard->cursor = len;
+	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;
+	
+	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 *keyboard, keyboard_input_mode mode)
+{
+	keyboard->input_mode = mode;
+}
+
+inline void keyboard_input_destroy(keyboard_input *keyboard)
+{
+	mem_free(keyboard->input_text);
+}
+
+static void keyboard_handle_input_copy_and_paste(platform_window *window, keyboard_input *keyboard)
+{
+	bool is_lctrl_down = keyboard->keys[KEY_LEFT_CONTROL];
+	
+	if (is_lctrl_down && keyboard_is_key_pressed(keyboard, KEY_V))
+	{
+		char buf[MAX_INPUT_LENGTH];
+		bool result = platform_get_clipboard(window, buf);
+		
+		if (keyboard->input_mode == INPUT_NUMERIC && !is_string_numeric(buf))
+		{
+			return;
+		}
+		
+		if (keyboard->has_selection)
+		{
+			keyboard->cursor = keyboard->selection_begin_offset;
+			utf8_str_remove_range(keyboard->input_text, keyboard->selection_begin_offset,
+								  keyboard->selection_begin_offset + keyboard->selection_length);
+			keyboard->has_selection = false;
+			keyboard->text_changed = true;
+		}
+		
+		if (result)
+		{
+			s32 len = utf8len(buf);
+			utf8_str_insert_utf8str(keyboard->input_text, keyboard->cursor, buf);
+			
+			keyboard->cursor += len;
+			keyboard->input_text_len += len;
+			keyboard->text_changed = true;
+		}
+	}
+	else if (is_lctrl_down && keyboard_is_key_pressed(keyboard, KEY_C))
+	{
+		char buffer[MAX_INPUT_LENGTH];
+		utf8_str_copy_range(keyboard->input_text, 
+							keyboard->selection_begin_offset,
+							keyboard->selection_begin_offset+keyboard->selection_length,
+							buffer);
+		
+		if (!string_equals(buffer, ""))
+			platform_set_clipboard(window, buffer);
+	}
+}
+
+void keyboard_handle_input_string(platform_window *window, keyboard_input *keyboard, char *ch)
+{
+	keyboard_handle_input_copy_and_paste(window, keyboard);
+	
+	bool is_lctrl_down = keyboard->keys[KEY_LEFT_CONTROL];
+	
+	if (ch)
+	{
+		if (keyboard->input_text_len < MAX_INPUT_LENGTH && !is_lctrl_down)
+		{
+			if (keyboard->has_selection)
+			{
+				keyboard->cursor = keyboard->selection_begin_offset;
+				utf8_str_remove_range(keyboard->input_text, keyboard->selection_begin_offset,
+									  keyboard->selection_begin_offset + keyboard->selection_length);
+				keyboard->has_selection = false;
+				keyboard->text_changed = true;
+			}
+			
+			if (keyboard->input_text_len)
+			{
+				utf8_str_insert_at(keyboard->input_text, keyboard->cursor, *ch);
+				keyboard->text_changed = true;
+			}
+			else
+			{
+				string_appendn(keyboard->input_text, ch, MAX_INPUT_LENGTH);
+				keyboard->text_changed = true;
+			}
+			
+			keyboard->cursor++;
+			keyboard->input_text_len = utf8len(keyboard->input_text);
+		}
+	}
+	else
+	{
+		bool is_lctrl_down = keyboard->keys[KEY_LEFT_CONTROL];
+		
+		// cursor movement
+		if (keyboard_is_key_down(keyboard, KEY_LEFT) && keyboard->cursor > 0)
+		{
+			if (is_lctrl_down)
+				keyboard->cursor = 0;
+			else
+				keyboard->cursor--;
+		}
+		if (keyboard_is_key_down(keyboard, KEY_RIGHT) && keyboard->cursor < keyboard->input_text_len)
+		{
+			if (is_lctrl_down)
+				keyboard->cursor = utf8len(keyboard->input_text);
+			else
+				keyboard->cursor++;
+		}
+	}
+	
+	if (keyboard_is_key_down(keyboard, KEY_BACKSPACE))
+	{
+		bool is_lctrl_down = keyboard->keys[KEY_LEFT_CONTROL];
+		
+		if (keyboard->has_selection)
+		{
+			utf8_str_remove_range(keyboard->input_text, keyboard->selection_begin_offset,
+								  keyboard->selection_begin_offset + keyboard->selection_length);
+			keyboard->has_selection = false;
+			keyboard->text_changed = true;
+			
+			if (keyboard->selection_begin_offset < keyboard->cursor)
+			{
+				keyboard->cursor -= keyboard->selection_length-1;
+			}
+		}
+		else if (is_lctrl_down)
+		{
+			for (s32 i = 0; i < keyboard->cursor; i++)
+			{
+				utf8_str_remove_at(keyboard->input_text, 0);
+			}
+			keyboard->cursor = 0;
+			keyboard->text_changed = true;
+		}
+		else if (keyboard->cursor > 0)
+		{
+			utf8_str_remove_at(keyboard->input_text, keyboard->cursor-1);
+			
+			keyboard->cursor--;
+			keyboard->text_changed = true;
+		}
+		
+		keyboard->input_text_len = utf8len(keyboard->input_text);
+	}
+}
\ No newline at end of file