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/*
* Copyright (c) 2021, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Noncopyable.h>
#include <LibGUI/Event.h>
#include <LibGUI/TextDocument.h>
namespace GUI {
enum CursorWidth {
NARROW,
WIDE
};
class EditingEngine {
AK_MAKE_NONCOPYABLE(EditingEngine);
AK_MAKE_NONMOVABLE(EditingEngine);
public:
virtual ~EditingEngine();
virtual CursorWidth cursor_width() const { return NARROW; }
void attach(TextEditor& editor);
void detach();
virtual bool on_key(const KeyEvent& event);
protected:
EditingEngine() { }
WeakPtr<TextEditor> m_editor;
void move_one_left(const KeyEvent& event);
void move_one_right(const KeyEvent& event);
void move_one_up(const KeyEvent& event);
void move_one_down(const KeyEvent& event);
void move_to_previous_span(const KeyEvent& event);
void move_to_next_span(const KeyEvent& event);
void move_to_line_beginning(const KeyEvent& event);
void move_to_line_end(const KeyEvent& event);
void move_page_up(const KeyEvent& event);
void move_page_down(const KeyEvent& event);
void move_to_first_line();
void move_to_last_line();
void move_to_beginning_of_next_word();
void move_to_end_of_next_word();
void move_to_end_of_previous_word();
void move_to_beginning_of_previous_word();
void move_up(const KeyEvent& event, double page_height_factor);
void move_down(const KeyEvent& event, double page_height_factor);
void get_selection_line_boundaries(size_t& first_line, size_t& last_line);
void delete_line();
void delete_char();
private:
void move_selected_lines_up();
void move_selected_lines_down();
};
}
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