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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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3
Libraries/LibGUI/GTextDocument.h
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@ -15,8 +15,10 @@ class GTextDocumentLine;
struct GTextDocumentSpan {
GTextRange range;
Color color;
Optional<Color> background_color;
bool is_skippable { false };
const Font* font { nullptr };
void* data { nullptr };
};
class GTextDocument : public RefCounted<GTextDocument> {
@ -54,6 +56,7 @@ public:
bool has_spans() const { return !m_spans.is_empty(); }
const Vector<GTextDocumentSpan>& spans() const { return m_spans; }
void set_span_at_index(int index, GTextDocumentSpan span) { m_spans[index] = move(span); }
void append_line(NonnullOwnPtr<GTextDocumentLine>);
void remove_line(int line_index);