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Libraries: Move to Userland/Libraries/
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1857 changed files with 266 additions and 274 deletions
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/*
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* Copyright (c) 2021, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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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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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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