bool SourceCoverageView::shouldRenderRegionMarkers(
const LineCoverageStats &LCS) const {
if (!getOptions().ShowRegionMarkers)
return false;
CoverageSegmentArray Segments = LCS.getLineSegments();
if (Segments.empty())
return false;
for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) {
const auto *CurSeg = Segments[I];
if (!CurSeg->IsRegionEntry || CurSeg->Count == LCS.getExecutionCount())
continue;
return true;
}
return false;
}
void SourceCoverageViewHTML::renderLine(
raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned) {
StringRef Line = L.Line;
unsigned LineNo = L.LineNo;
// Steps for handling text-escaping, highlighting, and tooltip creation:
//
// 1. Split the line into N+1 snippets, where N = |Segments|. The first
// snippet starts from Col=1 and ends at the start of the first segment.
// The last snippet starts at the last mapped column in the line and ends
// at the end of the line. Both are required but may be empty.
SmallVector<std::string, 8> Snippets;
unsigned LCol = 1;
auto Snip = [&](unsigned Start, unsigned Len) {
Snippets.push_back(Line.substr(Start, Len));
LCol += Len;
};
Snip(LCol - 1, Segments.empty() ? 0 : (Segments.front()->Col - 1));
for (unsigned I = 1, E = Segments.size(); I < E; ++I)
Snip(LCol - 1, Segments[I]->Col - LCol);
// |Line| + 1 is needed to avoid underflow when, e.g |Line| = 0 and LCol = 1.
Snip(LCol - 1, Line.size() + 1 - LCol);
// 2. Escape all of the snippets.
for (unsigned I = 0, E = Snippets.size(); I < E; ++I)
Snippets[I] = escape(Snippets[I], getOptions());
// 3. Use \p WrappedSegment to set the highlight for snippet 0. Use segment
// 1 to set the highlight for snippet 2, segment 2 to set the highlight for
// snippet 3, and so on.
Optional<std::string> Color;
SmallVector<std::pair<unsigned, unsigned>, 2> HighlightedRanges;
auto Highlight = [&](const std::string &Snippet, unsigned LC, unsigned RC) {
if (getOptions().Debug)
HighlightedRanges.emplace_back(LC, RC);
return tag("span", Snippet, Color.getValue());
};
auto CheckIfUncovered = [](const coverage::CoverageSegment *S) {
return S && S->HasCount && S->Count == 0;
};
if (CheckIfUncovered(WrappedSegment)) {
Color = "red";
if (!Snippets[0].empty())
Snippets[0] = Highlight(Snippets[0], 1, 1 + Snippets[0].size());
}
for (unsigned I = 0, E = Segments.size(); I < E; ++I) {
const auto *CurSeg = Segments[I];
if (CurSeg->Col == ExpansionCol)
Color = "cyan";
else if (CheckIfUncovered(CurSeg))
Color = "red";
else
Color = None;
if (Color.hasValue())
Snippets[I + 1] = Highlight(Snippets[I + 1], CurSeg->Col,
CurSeg->Col + Snippets[I + 1].size());
}
if (Color.hasValue() && Segments.empty())
Snippets.back() = Highlight(Snippets.back(), 1, 1 + Snippets.back().size());
if (getOptions().Debug) {
for (const auto &Range : HighlightedRanges) {
errs() << "Highlighted line " << LineNo << ", " << Range.first << " -> ";
if (Range.second == 0)
errs() << "?";
else
errs() << Range.second;
errs() << "\n";
}
}
// 4. Snippets[1:N+1] correspond to \p Segments[0:N]: use these to generate
// sub-line region count tooltips if needed.
bool HasMultipleRegions = [&] {
unsigned RegionCount = 0;
for (const auto *S : Segments)
if (S->HasCount && S->IsRegionEntry)
if (++RegionCount > 1)
return true;
return false;
}();
if (shouldRenderRegionMarkers(HasMultipleRegions)) {
for (unsigned I = 0, E = Segments.size(); I < E; ++I) {
const auto *CurSeg = Segments[I];
if (!CurSeg->IsRegionEntry || !CurSeg->HasCount)
continue;
Snippets[I + 1] =
tag("div", Snippets[I + 1] + tag("span", formatCount(CurSeg->Count),
"tooltip-content"),
"tooltip");
}
}
OS << BeginCodeTD;
OS << BeginPre;
for (const auto &Snippet : Snippets)
OS << Snippet;
OS << EndPre;
// If there are no sub-views left to attach to this cell, end the cell.
// Otherwise, end it after the sub-views are rendered (renderLineSuffix()).
if (!hasSubViews())
OS << EndCodeTD;
}