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https://github.com/LadybirdBrowser/ladybird.git
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22e80bae29
Having the delete key handling be done via an action limits our ability to support key modifiers (e.g. ctrl+delete deleting the word in front of the cursor). The fact that it was an action _did_ allow us to have a delete button in the TextEditor UI. However, this is an odd choice in the first place that isn't common in other text editors, so I just removed it.
410 lines
15 KiB
C++
410 lines
15 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/Function.h>
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#include <AK/NonnullOwnPtrVector.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <LibCore/ElapsedTimer.h>
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#include <LibCore/Timer.h>
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#include <LibGUI/AbstractScrollableWidget.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/Clipboard.h>
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#include <LibGUI/Forward.h>
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#include <LibGUI/TextDocument.h>
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#include <LibGUI/TextRange.h>
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#include <LibGfx/TextAlignment.h>
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#include <LibSyntax/Forward.h>
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#include <LibSyntax/HighlighterClient.h>
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namespace GUI {
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class TextEditor
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: public AbstractScrollableWidget
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, public TextDocument::Client
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, public Syntax::HighlighterClient
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, public Clipboard::ClipboardClient {
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C_OBJECT(TextEditor);
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public:
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enum Type {
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MultiLine,
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SingleLine
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};
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enum Mode {
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Editable,
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ReadOnly,
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DisplayOnly
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};
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enum WrappingMode {
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NoWrap,
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WrapAnywhere,
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WrapAtWords
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};
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virtual ~TextEditor() override;
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TextDocument const& document() const { return *m_document; }
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TextDocument& document() { return *m_document; }
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bool has_document() const { return !!m_document; }
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virtual void set_document(TextDocument&);
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String const& placeholder() const { return m_placeholder; }
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void set_placeholder(StringView placeholder) { m_placeholder = placeholder; }
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TextDocumentLine& current_line() { return line(m_cursor.line()); }
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TextDocumentLine const& current_line() const { return line(m_cursor.line()); }
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void set_visualize_trailing_whitespace(bool);
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bool visualize_trailing_whitespace() const { return m_visualize_trailing_whitespace; }
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void set_visualize_leading_whitespace(bool);
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bool visualize_leading_whitespace() const { return m_visualize_leading_whitespace; }
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bool is_cursor_line_highlighted() const { return m_cursor_line_highlighting; }
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void set_cursor_line_highlighting(bool);
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virtual bool is_automatic_indentation_enabled() const final { return m_automatic_indentation_enabled; }
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void set_automatic_indentation_enabled(bool enabled) { m_automatic_indentation_enabled = enabled; }
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virtual int soft_tab_width() const final { return m_soft_tab_width; }
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void set_soft_tab_width(int width) { m_soft_tab_width = width; };
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WrappingMode wrapping_mode() const { return m_wrapping_mode; }
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bool is_wrapping_enabled() const { return m_wrapping_mode != WrappingMode::NoWrap; }
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void set_wrapping_mode(WrappingMode);
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Gfx::TextAlignment text_alignment() const { return m_text_alignment; }
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void set_text_alignment(Gfx::TextAlignment);
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Type type() const { return m_type; }
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bool is_single_line() const { return m_type == SingleLine; }
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bool is_multi_line() const { return m_type == MultiLine; }
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Mode mode() const { return m_mode; }
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bool is_editable() const { return m_mode == Editable; }
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bool is_readonly() const { return m_mode == ReadOnly; }
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bool is_displayonly() const { return m_mode == DisplayOnly; }
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void set_mode(const Mode);
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bool is_ruler_visible() const { return m_ruler_visible; }
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void set_ruler_visible(bool);
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bool is_gutter_visible() const { return m_gutter_visible; }
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void set_gutter_visible(bool);
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void set_icon(Gfx::Bitmap const*);
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Gfx::Bitmap const* icon() const { return m_icon; }
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Function<void()> on_cursor_change;
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Function<void()> on_selection_change;
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Function<void()> on_focusin;
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Function<void()> on_focusout;
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void set_text(StringView, AllowCallback = AllowCallback::Yes);
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void scroll_cursor_into_view();
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void scroll_position_into_view(TextPosition const&);
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size_t line_count() const { return document().line_count(); }
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TextDocumentLine& line(size_t index) { return document().line(index); }
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TextDocumentLine const& line(size_t index) const { return document().line(index); }
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NonnullOwnPtrVector<TextDocumentLine>& lines() { return document().lines(); }
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NonnullOwnPtrVector<TextDocumentLine> const& lines() const { return document().lines(); }
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int line_spacing() const { return m_line_spacing; }
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int line_height() const;
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TextPosition cursor() const { return m_cursor; }
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TextRange normalized_selection() const { return m_selection.normalized(); }
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void insert_at_cursor_or_replace_selection(StringView);
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bool write_to_file(String const& path);
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bool write_to_file_and_close(int fd);
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bool has_selection() const { return m_selection.is_valid(); }
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String selected_text() const;
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size_t number_of_words() const;
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size_t number_of_selected_words() const;
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void set_selection(TextRange const&);
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void clear_selection();
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bool can_undo() const { return document().can_undo(); }
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bool can_redo() const { return document().can_redo(); }
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String text() const;
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void clear();
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void cut();
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void copy();
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void paste();
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void do_delete();
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void delete_current_line();
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void delete_previous_word();
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void delete_previous_char();
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void delete_from_line_start_to_cursor();
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void select_all();
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void select_current_line();
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virtual void undo();
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virtual void redo();
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Function<void()> on_change;
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Function<void(bool modified)> on_modified_change;
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Function<void()> on_mousedown;
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Function<void()> on_return_pressed;
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Function<void()> on_shift_return_pressed;
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Function<void()> on_escape_pressed;
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Function<void()> on_up_pressed;
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Function<void()> on_down_pressed;
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Function<void()> on_pageup_pressed;
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Function<void()> on_pagedown_pressed;
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Action& undo_action() { return *m_undo_action; }
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Action& redo_action() { return *m_redo_action; }
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Action& cut_action() { return *m_cut_action; }
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Action& copy_action() { return *m_copy_action; }
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Action& paste_action() { return *m_paste_action; }
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Action& go_to_line_action() { return *m_go_to_line_action; }
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Action& select_all_action() { return *m_select_all_action; }
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void add_custom_context_menu_action(Action&);
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void set_cursor_and_focus_line(size_t line, size_t column);
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void set_cursor(size_t line, size_t column);
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virtual void set_cursor(TextPosition const&);
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Syntax::Highlighter const* syntax_highlighter() const;
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void set_syntax_highlighter(OwnPtr<Syntax::Highlighter>);
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AutocompleteProvider const* autocomplete_provider() const;
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void set_autocomplete_provider(OwnPtr<AutocompleteProvider>&&);
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EditingEngine const* editing_engine() const;
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void set_editing_engine(OwnPtr<EditingEngine>);
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bool should_autocomplete_automatically() const { return m_autocomplete_timer; }
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void set_should_autocomplete_automatically(bool);
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u32 substitution_code_point() const { return m_substitution_code_point; }
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void set_substitution_code_point(u32 code_point);
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bool is_in_drag_select() const { return m_in_drag_select; }
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TextRange& selection() { return m_selection; };
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void did_update_selection();
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void did_change(AllowCallback = AllowCallback::Yes);
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void update_cursor();
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void add_code_point(u32 code_point);
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void reset_cursor_blink();
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void update_selection(bool is_selecting);
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int number_of_visible_lines() const;
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Gfx::IntRect cursor_content_rect() const;
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TextPosition text_position_at_content_position(Gfx::IntPoint const&) const;
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void delete_text_range(TextRange);
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bool text_is_secret() const { return m_text_is_secret; }
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void set_text_is_secret(bool text_is_secret);
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protected:
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explicit TextEditor(Type = Type::MultiLine);
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virtual void did_change_font() override;
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virtual void paint_event(PaintEvent&) override;
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virtual void mousedown_event(MouseEvent&) override;
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virtual void mouseup_event(MouseEvent&) override;
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virtual void mousemove_event(MouseEvent&) override;
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virtual void doubleclick_event(MouseEvent&) override;
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virtual void keydown_event(KeyEvent&) override;
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virtual void focusin_event(FocusEvent&) override;
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virtual void focusout_event(FocusEvent&) override;
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virtual void timer_event(Core::TimerEvent&) override;
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virtual void enter_event(Core::Event&) override;
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virtual void leave_event(Core::Event&) override;
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virtual void context_menu_event(ContextMenuEvent&) override;
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virtual void resize_event(ResizeEvent&) override;
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virtual void theme_change_event(ThemeChangeEvent&) override;
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virtual void cursor_did_change();
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Gfx::IntRect ruler_content_rect(size_t line) const;
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Gfx::IntRect gutter_content_rect(size_t line) const;
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TextPosition text_position_at(Gfx::IntPoint const&) const;
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bool ruler_visible() const { return m_ruler_visible; }
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bool gutter_visible() const { return m_gutter_visible; }
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Gfx::IntRect content_rect_for_position(TextPosition const&) const;
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int ruler_width() const;
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int gutter_width() const;
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private:
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friend class TextDocumentLine;
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// ^TextDocument::Client
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virtual void document_did_append_line() override;
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virtual void document_did_insert_line(size_t) override;
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virtual void document_did_remove_line(size_t) override;
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virtual void document_did_remove_all_lines() override;
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virtual void document_did_change(AllowCallback = AllowCallback::Yes) override;
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virtual void document_did_set_text(AllowCallback = AllowCallback::Yes) override;
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virtual void document_did_set_cursor(TextPosition const&) override;
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virtual void document_did_update_undo_stack() override;
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// ^Syntax::HighlighterClient
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virtual Vector<TextDocumentSpan>& spans() final { return document().spans(); }
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virtual Vector<TextDocumentSpan> const& spans() const final { return document().spans(); }
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virtual void highlighter_did_set_spans(Vector<TextDocumentSpan> spans) final { document().set_spans(move(spans)); }
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virtual void set_span_at_index(size_t index, TextDocumentSpan span) final { document().set_span_at_index(index, move(span)); }
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virtual void highlighter_did_request_update() final { update(); }
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virtual String highlighter_did_request_text() const final { return text(); }
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virtual GUI::TextDocument& highlighter_did_request_document() final { return document(); }
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virtual GUI::TextPosition highlighter_did_request_cursor() const final { return m_cursor; }
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// ^Clipboard::ClipboardClient
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virtual void clipboard_content_did_change(String const& mime_type) override;
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void create_actions();
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void paint_ruler(Painter&);
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void update_content_size();
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int fixed_glyph_width() const;
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void defer_reflow();
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void undefer_reflow();
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enum UserRequestedAutocomplete {
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No,
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Yes
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};
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void try_show_autocomplete(UserRequestedAutocomplete);
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void try_update_autocomplete(Function<void()> callback = {});
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void force_update_autocomplete(Function<void()> callback = {});
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void hide_autocomplete_if_needed();
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void hide_autocomplete();
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int icon_size() const { return 16; }
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int icon_padding() const { return 2; }
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class ReflowDeferrer {
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public:
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ReflowDeferrer(TextEditor& editor)
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: m_editor(editor)
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{
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m_editor.defer_reflow();
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}
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~ReflowDeferrer()
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{
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m_editor.undefer_reflow();
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}
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private:
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TextEditor& m_editor;
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};
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int text_width_for_font(auto const& text_view, Gfx::Font const&) const;
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Utf32View substitution_code_point_view(size_t length) const;
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Gfx::IntRect line_content_rect(size_t item_index) const;
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Gfx::IntRect line_widget_rect(size_t line_index) const;
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void delete_selection();
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int content_x_for_position(TextPosition const&) const;
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Gfx::IntRect ruler_rect_in_inner_coordinates() const;
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Gfx::IntRect gutter_rect_in_inner_coordinates() const;
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Gfx::IntRect visible_text_rect_in_inner_coordinates() const;
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void recompute_all_visual_lines();
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void ensure_cursor_is_valid();
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void rehighlight_if_needed();
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size_t visual_line_containing(size_t line_index, size_t column) const;
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void recompute_visual_lines(size_t line_index);
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void automatic_selection_scroll_timer_fired();
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template<class T, class... Args>
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inline void execute(Args&&... args)
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{
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auto command = make<T>(*m_document, forward<Args>(args)...);
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command->perform_formatting(*this);
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will_execute(*command);
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command->execute_from(*this);
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m_document->add_to_undo_stack(move(command));
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}
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virtual void will_execute(TextDocumentUndoCommand const&) { }
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Type m_type { MultiLine };
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Mode m_mode { Editable };
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TextPosition m_cursor;
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Gfx::TextAlignment m_text_alignment { Gfx::TextAlignment::CenterLeft };
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bool m_cursor_state { true };
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bool m_in_drag_select { false };
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bool m_ruler_visible { false };
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bool m_gutter_visible { false };
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bool m_needs_rehighlight { false };
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bool m_has_pending_change_notification { false };
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bool m_automatic_indentation_enabled { false };
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WrappingMode m_wrapping_mode { WrappingMode::NoWrap };
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bool m_visualize_trailing_whitespace { true };
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bool m_visualize_leading_whitespace { false };
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bool m_cursor_line_highlighting { true };
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int m_line_spacing { 4 };
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size_t m_soft_tab_width { 4 };
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int m_horizontal_content_padding { 3 };
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TextRange m_selection;
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// NOTE: If non-zero, all glyphs will be substituted with this one.
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u32 m_substitution_code_point { 0 };
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mutable OwnPtr<Vector<u32>> m_substitution_string_data; // Used to avoid repeated String construction.
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RefPtr<Menu> m_context_menu;
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RefPtr<Action> m_undo_action;
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RefPtr<Action> m_redo_action;
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RefPtr<Action> m_cut_action;
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RefPtr<Action> m_copy_action;
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RefPtr<Action> m_paste_action;
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RefPtr<Action> m_go_to_line_action;
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RefPtr<Action> m_select_all_action;
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Core::ElapsedTimer m_triple_click_timer;
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NonnullRefPtrVector<Action> m_custom_context_menu_actions;
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size_t m_reflow_deferred { 0 };
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bool m_reflow_requested { false };
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bool is_visual_data_up_to_date() const { return !m_reflow_requested; }
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RefPtr<TextDocument> m_document;
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String m_placeholder { "" };
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template<typename Callback>
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void for_each_visual_line(size_t line_index, Callback) const;
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struct LineVisualData {
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Vector<size_t, 1> visual_line_breaks;
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Gfx::IntRect visual_rect;
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};
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NonnullOwnPtrVector<LineVisualData> m_line_visual_data;
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OwnPtr<Syntax::Highlighter> m_highlighter;
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OwnPtr<AutocompleteProvider> m_autocomplete_provider;
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OwnPtr<AutocompleteBox> m_autocomplete_box;
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bool m_should_keep_autocomplete_box { false };
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size_t m_automatic_autocomplete_delay_ms { 800 };
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RefPtr<Core::Timer> m_automatic_selection_scroll_timer;
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RefPtr<Core::Timer> m_autocomplete_timer;
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OwnPtr<EditingEngine> m_editing_engine;
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Gfx::IntPoint m_last_mousemove_position;
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RefPtr<Gfx::Bitmap> m_icon;
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bool m_text_is_secret { false };
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};
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}
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