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LibGUI: Implement trailing whitespace visualization in TextEditor

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This patch adds an optional mode where TextEditor highlights trailing
whitespace characters on each line with a nice reddish dither pattern.

We should probably make this themable and I'm sure it could be nicer
somehow, but this is just a first cut and I do kinda like it. :^)
This commit is contained in:
Andreas Kling 2020-09-01 19:10:55 +02:00
parent 08f1ea3e45
commit aa70d8c217
4 changed files with 52 additions and 0 deletions
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4
Libraries/LibGUI/TextEditor.h
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@ -60,6 +60,9 @@ public:
virtual void set_document(TextDocument&);
void set_visualize_trailing_whitespace(bool);
bool visualize_trailing_whitespace() const { return m_visualize_trailing_whitespace; }
bool has_visible_list() const { return m_has_visible_list; }
void set_has_visible_list(bool);
bool has_open_button() const { return m_has_open_button; }
@ -274,6 +277,7 @@ private:
bool m_line_wrapping_enabled { false };
bool m_has_visible_list { false };
bool m_has_open_button { false };
bool m_visualize_trailing_whitespace { true };
int m_line_spacing { 4 };
size_t m_soft_tab_width { 4 };
int m_horizontal_content_padding { 3 };