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GTextEditor: Start working on a line-wrapping feature

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This is not finished, but since the feature is controlled by a runtime
flag, the broken implementation should not affect users of this widget
too much (in theory :^).)
This commit is contained in:
Andreas Kling 2019-08-25 08:43:01 +02:00
parent 280a9a2f34
commit 9752e683f6
2 changed files with 126 additions and 20 deletions
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16
Libraries/LibGUI/GTextEditor.h
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@ -101,6 +101,9 @@ public:
bool is_automatic_indentation_enabled() const { return m_automatic_indentation_enabled; }
void set_automatic_indentation_enabled(bool enabled) { m_automatic_indentation_enabled = enabled; }
bool is_line_wrapping_enabled() const { return m_line_wrapping_enabled; }
void set_line_wrapping_enabled(bool enabled) { m_line_wrapping_enabled = enabled; }
TextAlignment text_alignment() const { return m_text_alignment; }
void set_text_alignment(TextAlignment);
@ -132,7 +135,7 @@ public:
GTextPosition next_position_after(const GTextPosition&, ShouldWrapAtEndOfDocument = ShouldWrapAtEndOfDocument::Yes);
GTextPosition prev_position_before(const GTextPosition&, ShouldWrapAtStartOfDocument = ShouldWrapAtStartOfDocument::Yes);
bool has_selection() const { return m_selection.is_valid(); }
String selected_text() const;
void set_selection(const GTextRange&);
@ -187,6 +190,7 @@ private:
explicit Line(GTextEditor&);
Line(GTextEditor&, const StringView&);
StringView view() const { return { characters(), length() }; }
const char* characters() const { return m_text.data(); }
int length() const { return m_text.size() - 1; }
int width(const Font&) const;
@ -198,12 +202,19 @@ private:
void append(const char*, int);
void truncate(int length);
void clear();
void recompute_visual_lines();
template<typename Callback>
void for_each_visual_line(Callback) const;
private:
GTextEditor& m_editor;
// NOTE: This vector is null terminated.
Vector<char> m_text;
Vector<int, 1> m_visual_line_breaks;
Rect m_visual_rect;
};
Rect line_content_rect(int item_index) const;
@ -228,6 +239,7 @@ private:
char character_at(const GTextPosition&) const;
Rect ruler_rect_in_inner_coordinates() const;
Rect visible_text_rect_in_inner_coordinates() const;
void recompute_all_visual_lines();
Type m_type { MultiLine };
@ -239,6 +251,7 @@ private:
bool m_ruler_visible { false };
bool m_have_pending_change_notification { false };
bool m_automatic_indentation_enabled { false };
bool m_line_wrapping_enabled { false };
bool m_readonly { false };
int m_line_spacing { 4 };
int m_soft_tab_width { 4 };
@ -267,4 +280,3 @@ inline const LogStream& operator<<(const LogStream& stream, const GTextRange& va
return stream << "GTextRange(Invalid)";
return stream << value.start() << '-' << value.end();
}