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53aec3e06d
This patch implements Vim motions. The VimMotion class will accept keycodes from the editing engine to build up a motion, and will signal when a motion is complete via VimMotion::is_complete(). The editing engine can then call VimMotion::get_range() to obtain a TextRange object which can be used to perform operations on the text, or VimMotion::get_position() to obtain a TextPosition which is the new position of the cursor after the motion. Currently, the following motions are supported: - h/j/k/l, regular Vim line and character movements - 0/^/$, start/end of line and start of non-blank - w/e/b/ge, word-related movements - W/E/B/gE, WORD (anything non-blank) versions of the above motions - gg/G, document related movements - t/f, to/find character All motions except gg/G accept a number prefix to repeat the motion that many times. This patch updates insert, normal and visual modes to use this motion system for movement.
79 lines
2 KiB
C++
79 lines
2 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <LibGUI/Event.h>
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#include <LibGUI/TextDocument.h>
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namespace GUI {
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enum CursorWidth {
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NARROW,
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WIDE
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};
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class EditingEngine {
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AK_MAKE_NONCOPYABLE(EditingEngine);
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AK_MAKE_NONMOVABLE(EditingEngine);
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public:
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virtual ~EditingEngine();
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virtual CursorWidth cursor_width() const { return NARROW; }
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void attach(TextEditor& editor);
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void detach();
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TextEditor& editor()
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{
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VERIFY(!m_editor.is_null());
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return *m_editor.unsafe_ptr();
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}
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virtual bool on_key(const KeyEvent& event);
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protected:
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EditingEngine() { }
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WeakPtr<TextEditor> m_editor;
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void move_one_left(const KeyEvent& event);
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void move_one_right(const KeyEvent& event);
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void move_one_up(const KeyEvent& event);
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void move_one_down(const KeyEvent& event);
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void move_to_previous_span(const KeyEvent& event);
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void move_to_next_span(const KeyEvent& event);
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void move_to_line_beginning(const KeyEvent& event);
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void move_to_line_end(const KeyEvent& event);
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void move_page_up(const KeyEvent& event);
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void move_page_down(const KeyEvent& event);
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void move_to_first_line();
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void move_to_last_line();
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TextPosition find_beginning_of_next_word();
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void move_to_beginning_of_next_word();
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TextPosition find_end_of_next_word();
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void move_to_end_of_next_word();
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TextPosition find_end_of_previous_word();
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void move_to_end_of_previous_word();
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TextPosition find_beginning_of_previous_word();
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void move_to_beginning_of_previous_word();
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void move_up(const KeyEvent& event, double page_height_factor);
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void move_down(const KeyEvent& event, double page_height_factor);
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void get_selection_line_boundaries(size_t& first_line, size_t& last_line);
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void delete_line();
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void delete_char();
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private:
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void move_selected_lines_up();
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void move_selected_lines_down();
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};
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}
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