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Spreadsheet+LibSyntax: Never insert spans directly
Function `CellSyntaxHighlighter::rehighlight()` direct inserted spans to TextDocument `m_span` vector missing out important reordering and merging operation carried out by `TextDocument::set_spans()`. This caused overlapping spans for a cell with only a `=` symbol (one for the actual token and one for the highlighting) to miscalculate `start` and `end` value and a `length` value (of `size_t` type) with a `0-1` substraction (result: 18446744073709551615) causing `Utf32View::substring_view()` to fail the `!Checked<size_t>::addition_would_overflow(offset, length)` assertion This remove the possibility to directly alter `TextDocument`'s spans thus forcing the utilization of `HighlighterClient::do_set_spans()` interface function. Proper refactor have been applied to `CellSyntaxHighlighter::rehighlight()` function
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4 changed files with 31 additions and 30 deletions
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@ -17,9 +17,9 @@ class HighlighterClient {
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public:
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virtual ~HighlighterClient() = default;
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virtual Vector<GUI::TextDocumentSpan>& spans() = 0;
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virtual Vector<GUI::TextDocumentSpan> const& spans() const = 0;
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virtual void set_span_at_index(size_t index, GUI::TextDocumentSpan span) = 0;
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virtual void clear_spans() { do_set_spans({}); };
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virtual Vector<GUI::TextDocumentFoldingRegion>& folding_regions() = 0;
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virtual Vector<GUI::TextDocumentFoldingRegion> const& folding_regions() const = 0;
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