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HackStudio+LibGUI: Implement matching curly brace highlighting

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This works for C++ syntax highlighted text documents by caching the C++
token type in a new "arbitrary data" member of GTextDocumentSpan.

When the cursor is placed immediately before a '{' or immediately after
a '}', we highlight both of these brace buddies by changing their
corresponding spans to have a different background color.

..and spans can also now have a custom background color. :^)
This commit is contained in:
Andreas Kling 2019-11-18 19:10:06 +01:00
parent 5f7f97355e
commit c8e02e60a6
6 changed files with 89 additions and 1 deletions
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9
DevTools/HackStudio/Editor.h
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@ -20,6 +20,7 @@ private:
virtual void focusout_event(CEvent&) override;
virtual void paint_event(GPaintEvent&) override;
virtual void mousemove_event(GMouseEvent&) override;
virtual void cursor_did_change() override;
void show_documentation_tooltip_if_available(const String&, const Point& screen_location);
@ -28,4 +29,12 @@ private:
RefPtr<GWindow> m_documentation_tooltip_window;
RefPtr<HtmlView> m_documentation_html_view;
String m_last_parsed_token;
struct BuddySpan {
int index { -1 };
GTextDocumentSpan span_backup;
};
bool m_has_brace_buddies { false };
BuddySpan m_brace_buddies[2];
};