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https://github.com/LadybirdBrowser/ladybird.git
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6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
/*
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* Copyright (c) 2021-2022, 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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enum EngineType {
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Regular,
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Vim,
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};
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class MoveLineUpOrDownCommand;
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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() = default;
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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(KeyEvent const& event);
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bool is_regular() const { return engine_type() == EngineType::Regular; }
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bool is_vim() const { return engine_type() == EngineType::Vim; }
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void get_selection_line_boundaries(Badge<MoveLineUpOrDownCommand>, size_t& first_line, size_t& last_line);
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protected:
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EditingEngine() = default;
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WeakPtr<TextEditor> m_editor;
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enum class DidMoveALine {
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No,
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Yes,
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};
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void move_one_left();
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void move_one_right();
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void move_one_helper(KeyEvent const& event, VerticalDirection direction);
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DidMoveALine move_one_up(KeyEvent const& event);
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DidMoveALine move_one_down(KeyEvent const& event);
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void move_to_previous_span();
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void move_to_next_span();
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void move_to_logical_line_beginning();
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void move_to_logical_line_end();
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void move_to_line_beginning();
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void move_to_line_end();
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void move_page_up();
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void move_page_down();
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void move_to_first_line();
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void move_to_last_line();
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void move_up(double page_height_factor);
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void move_down(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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virtual EngineType engine_type() const = 0;
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};
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class MoveLineUpOrDownCommand : public TextDocumentUndoCommand {
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public:
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MoveLineUpOrDownCommand(TextDocument&, KeyEvent event, EditingEngine&);
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virtual void undo() override;
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virtual void redo() override;
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bool merge_with(GUI::Command const&) override;
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DeprecatedString action_text() const override;
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static bool valid_operation(EditingEngine& engine, VerticalDirection direction);
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private:
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void move_lines(VerticalDirection);
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TextRange retrieve_selection(VerticalDirection);
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KeyEvent m_event;
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VerticalDirection m_direction;
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EditingEngine& m_engine;
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TextRange m_selection;
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TextPosition m_cursor;
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};
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}
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