tools/llvm-cov/SourceCoverageViewHTML.cpp - llvm - Git at Google

 //===- SourceCoverageViewHTML.cpp - A html code coverage view -------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file This file implements the html coverage renderer.
 ///
 //===----------------------------------------------------------------------===//

 #include "SourceCoverageViewHTML.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/Path.h"

 using namespace llvm;

 namespace {

 const char *BeginHeader =
   "<head>"
     "<meta name='viewport' content='width=device-width,initial-scale=1'>"
     "<meta charset='UTF-8'>";

 const char *CSSForCoverage =
   "<style>"
 R"(

 .red {
   background-color: #FFD0D0;
 }
 .cyan {
   background-color: cyan;
 }
 .black {
   background-color: black;
   color: white;
 }
 .green {
   background-color: #98FFA6;
   color: white;
 }
 .magenta {
   background-color: #F998FF;
   color: white;
 }
 body {
   font-family: -apple-system, sans-serif;
 }
 pre {
   margin-top: 0px !important;
   margin-bottom: 0px !important;
 }
 .source-name-title {
   padding: 5px 10px;
   border-bottom: 1px solid #dbdbdb;
   background-color: #eee;
 }
 .centered {
   display: table;
   margin-left: auto;
   margin-right: auto;
   border: 1px solid #dbdbdb;
   border-radius: 3px;
 }
 .expansion-view {
   background-color: rgba(0, 0, 0, 0);
   margin-left: 0px;
   margin-top: 5px;
   margin-right: 5px;
   margin-bottom: 5px;
   border: 1px solid #dbdbdb;
   border-radius: 3px;
 }
 table {
   border-collapse: collapse;
 }
 .line-number {
   text-align: right;
   color: #aaa;
 }
 .covered-line {
   text-align: right;
   color: #0080ff;
 }
 .uncovered-line {
   text-align: right;
   color: #ff3300;
 }
 .tooltip {
   position: relative;
   display: inline;
   background-color: #b3e6ff;
   text-decoration: none;
 }
 .tooltip span.tooltip-content {
   position: absolute;
   width: 100px;
   margin-left: -50px;
   color: #FFFFFF;
   background: #000000;
   height: 30px;
   line-height: 30px;
   text-align: center;
   visibility: hidden;
   border-radius: 6px;
 }
 .tooltip span.tooltip-content:after {
   content: '';
   position: absolute;
   top: 100%;
   left: 50%;
   margin-left: -8px;
   width: 0; height: 0;
   border-top: 8px solid #000000;
   border-right: 8px solid transparent;
   border-left: 8px solid transparent;
 }
 :hover.tooltip span.tooltip-content {
   visibility: visible;
   opacity: 0.8;
   bottom: 30px;
   left: 50%;
   z-index: 999;
 }
 th, td {
   vertical-align: top;
   padding: 2px 5px;
   border-collapse: collapse;
   border-right: solid 1px #eee;
   border-left: solid 1px #eee;
 }
 td:first-child {
   border-left: none;
 }
 td:last-child {
   border-right: none;
 }

 )"
   "</style>";

 const char *EndHeader = "</head>";

 const char *BeginCenteredDiv = "<div class='centered'>";

 const char *EndCenteredDiv = "</div>";

 const char *BeginSourceNameDiv = "<div class='source-name-title'>";

 const char *EndSourceNameDiv = "</div>";

 const char *BeginCodeTD = "<td class='code'>";

 const char *EndCodeTD = "</td>";

 const char *BeginPre = "<pre>";

 const char *EndPre = "</pre>";

 const char *BeginExpansionDiv = "<div class='expansion-view'>";

 const char *EndExpansionDiv = "</div>";

 const char *BeginTable = "<table>";

 const char *EndTable = "</table>";

 void emitPrelude(raw_ostream &OS) {
   OS << "<!doctype html>"
         "<html>"
      << BeginHeader << CSSForCoverage << EndHeader << "<body>"
      << BeginCenteredDiv;
 }

 void emitEpilog(raw_ostream &OS) {
   OS << EndCenteredDiv << "</body>"
                           "</html>";
 }

 // Return a string with the special characters in \p Str escaped.
 std::string escape(StringRef Str) {
   std::string Result;
   for (char C : Str) {
     if (C == '&')
       Result += "&amp;";
     else if (C == '<')
       Result += "&lt;";
     else if (C == '>')
       Result += "&gt;";
     else if (C == '\"')
       Result += "&quot;";
     else
       Result += C;
   }
   return Result;
 }

 // Create a \p Name tag around \p Str, and optionally set its \p ClassName.
 std::string tag(const std::string &Name, const std::string &Str,
                 const std::string &ClassName = "") {
   std::string Tag = "<" + Name;
   if (ClassName != "")
     Tag += " class='" + ClassName + "'";
   return Tag + ">" + Str + "</" + Name + ">";
 }

 // Create an anchor to \p Link with the label \p Str.
 std::string a(const std::string &Link, const std::string &Str) {
   return "<a href='" + Link + "'>" + Str + "</a>";
 }

 } // anonymous namespace

 Expected<CoveragePrinter::OwnedStream>
 CoveragePrinterHTML::createViewFile(StringRef Path, bool InToplevel) {
   auto OSOrErr = createOutputStream(Path, "html", InToplevel);
   if (!OSOrErr)
     return OSOrErr;

   OwnedStream OS = std::move(OSOrErr.get());
   emitPrelude(*OS.get());
   return std::move(OS);
 }

 void CoveragePrinterHTML::closeViewFile(OwnedStream OS) {
   emitEpilog(*OS.get());
 }

 Error CoveragePrinterHTML::createIndexFile(ArrayRef<StringRef> SourceFiles) {
   auto OSOrErr = createOutputStream("index", "html", /*InToplevel=*/true);
   if (Error E = OSOrErr.takeError())
     return E;
   auto OS = std::move(OSOrErr.get());
   raw_ostream &OSRef = *OS.get();

   // Emit a table containing links to reports for each file in the covmapping.
   emitPrelude(OSRef);
   OSRef << BeginSourceNameDiv << "Index" << EndSourceNameDiv;
   OSRef << BeginTable;
   for (StringRef SF : SourceFiles) {
     std::string LinkText = escape(sys::path::relative_path(SF));
     std::string LinkTarget =
         escape(getOutputPath(SF, "html", /*InToplevel=*/false));
     OSRef << tag("tr", tag("td", tag("pre", a(LinkTarget, LinkText), "code")));
   }
   OSRef << EndTable;
   emitEpilog(OSRef);

   return Error::success();
 }

 void SourceCoverageViewHTML::renderViewHeader(raw_ostream &OS) {
   OS << BeginTable;
 }

 void SourceCoverageViewHTML::renderViewFooter(raw_ostream &OS) {
   OS << EndTable;
 }

 void SourceCoverageViewHTML::renderSourceName(raw_ostream &OS) {
   OS << BeginSourceNameDiv << tag("pre", escape(getSourceName()))
      << EndSourceNameDiv;
 }

 void SourceCoverageViewHTML::renderLinePrefix(raw_ostream &OS, unsigned) {
   OS << "<tr>";
 }

 void SourceCoverageViewHTML::renderLineSuffix(raw_ostream &OS, unsigned) {
   // If this view has sub-views, renderLine() cannot close the view's cell.
   // Take care of it here, after all sub-views have been rendered.
   if (hasSubViews())
     OS << EndCodeTD;
   OS << "</tr>";
 }

 void SourceCoverageViewHTML::renderViewDivider(raw_ostream &, unsigned) {
   // The table-based output makes view dividers unnecessary.
 }

 void SourceCoverageViewHTML::renderLine(
     raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
     CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned) {
   StringRef Line = L.Line;

   // 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) {
     assert(Start + Len <= Line.size() && "Snippet extends past the EOL");
     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) {
     assert(LCol == Segments[I - 1]->Col && "Snippet start position is wrong");
     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);
   assert(LCol == Line.size() + 1 && "Final snippet doesn't reach the EOL");

   // 2. Escape all of the snippets.

   for (unsigned I = 0, E = Snippets.size(); I < E; ++I)
     Snippets[I] = escape(Snippets[I]);

   // 3. Use \p WrappedSegment to set the highlight for snippets 0 and 1. 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;
   auto Highlight = [&](const std::string &Snippet) {
     return tag("span", Snippet, Color.getValue());
   };

   auto CheckIfUncovered = [](const coverage::CoverageSegment *S) {
     return S && S->HasCount && S->Count == 0;
   };

   if (CheckIfUncovered(WrappedSegment) ||
       CheckIfUncovered(Segments.empty() ? nullptr : Segments.front())) {
     Color = "red";
     Snippets[0] = Highlight(Snippets[0]);
     Snippets[1] = Highlight(Snippets[1]);
   }

   for (unsigned I = 1, 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]);
   }

   // 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;
 }

 void SourceCoverageViewHTML::renderLineCoverageColumn(
     raw_ostream &OS, const LineCoverageStats &Line) {
   std::string Count = "";
   if (Line.isMapped())
     Count = tag("pre", formatCount(Line.ExecutionCount));
   std::string CoverageClass =
       (Line.ExecutionCount > 0) ? "covered-line" : "uncovered-line";
   OS << tag("td", Count, CoverageClass);
 }

 void SourceCoverageViewHTML::renderLineNumberColumn(raw_ostream &OS,
                                                     unsigned LineNo) {
   OS << tag("td", tag("pre", utostr(uint64_t(LineNo))), "line-number");
 }

 void SourceCoverageViewHTML::renderRegionMarkers(raw_ostream &,
                                                  CoverageSegmentArray,
                                                  unsigned) {
   // Region markers are rendered in-line using tooltips.
 }

 void SourceCoverageViewHTML::renderExpansionSite(
     raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
     CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned ViewDepth) {
   // Render the line containing the expansion site. No extra formatting needed.
   renderLine(OS, L, WrappedSegment, Segments, ExpansionCol, ViewDepth);
 }

 void SourceCoverageViewHTML::renderExpansionView(raw_ostream &OS,
                                                  ExpansionView &ESV,
                                                  unsigned ViewDepth) {
   OS << BeginExpansionDiv;
   ESV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/false,
                   ViewDepth + 1);
   OS << EndExpansionDiv;
 }

 void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS,
                                                      InstantiationView &ISV,
                                                      unsigned ViewDepth) {
   OS << BeginExpansionDiv;
   ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true, ViewDepth);
   OS << EndExpansionDiv;
 }
	//===- SourceCoverageViewHTML.cpp - A html code coverage view -------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file This file implements the html coverage renderer.
	///
	//===----------------------------------------------------------------------===//

	#include "SourceCoverageViewHTML.h"
	#include "llvm/ADT/Optional.h"
	#include "llvm/ADT/SmallString.h"
	#include "llvm/ADT/StringExtras.h"
	#include "llvm/Support/Path.h"

	using namespace llvm;

	namespace {

	const char *BeginHeader =
	"<head>"
	"<meta name='viewport' content='width=device-width,initial-scale=1'>"
	"<meta charset='UTF-8'>";

	const char *CSSForCoverage =
	"<style>"
	R"(

	.red {
	background-color: #FFD0D0;
	}
	.cyan {
	background-color: cyan;
	}
	.black {
	background-color: black;
	color: white;
	}
	.green {
	background-color: #98FFA6;
	color: white;
	}
	.magenta {
	background-color: #F998FF;
	color: white;
	}
	body {
	font-family: -apple-system, sans-serif;
	}
	pre {
	margin-top: 0px !important;
	margin-bottom: 0px !important;
	}
	.source-name-title {
	padding: 5px 10px;
	border-bottom: 1px solid #dbdbdb;
	background-color: #eee;
	}
	.centered {
	display: table;
	margin-left: auto;
	margin-right: auto;
	border: 1px solid #dbdbdb;
	border-radius: 3px;
	}
	.expansion-view {
	background-color: rgba(0, 0, 0, 0);
	margin-left: 0px;
	margin-top: 5px;
	margin-right: 5px;
	margin-bottom: 5px;
	border: 1px solid #dbdbdb;
	border-radius: 3px;
	}
	table {
	border-collapse: collapse;
	}
	.line-number {
	text-align: right;
	color: #aaa;
	}
	.covered-line {
	text-align: right;
	color: #0080ff;
	}
	.uncovered-line {
	text-align: right;
	color: #ff3300;
	}
	.tooltip {
	position: relative;
	display: inline;
	background-color: #b3e6ff;
	text-decoration: none;
	}
	.tooltip span.tooltip-content {
	position: absolute;
	width: 100px;
	margin-left: -50px;
	color: #FFFFFF;
	background: #000000;
	height: 30px;
	line-height: 30px;
	text-align: center;
	visibility: hidden;
	border-radius: 6px;
	}
	.tooltip span.tooltip-content:after {
	content: '';
	position: absolute;
	top: 100%;
	left: 50%;
	margin-left: -8px;
	width: 0; height: 0;
	border-top: 8px solid #000000;
	border-right: 8px solid transparent;
	border-left: 8px solid transparent;
	}
	:hover.tooltip span.tooltip-content {
	visibility: visible;
	opacity: 0.8;
	bottom: 30px;
	left: 50%;
	z-index: 999;
	}
	th, td {
	vertical-align: top;
	padding: 2px 5px;
	border-collapse: collapse;
	border-right: solid 1px #eee;
	border-left: solid 1px #eee;
	}
	td:first-child {
	border-left: none;
	}
	td:last-child {
	border-right: none;
	}

	)"
	"</style>";

	const char *EndHeader = "</head>";

	const char *BeginCenteredDiv = "<div class='centered'>";

	const char *EndCenteredDiv = "</div>";

	const char *BeginSourceNameDiv = "<div class='source-name-title'>";

	const char *EndSourceNameDiv = "</div>";

	const char *BeginCodeTD = "<td class='code'>";

	const char *EndCodeTD = "</td>";

	const char *BeginPre = "<pre>";

	const char *EndPre = "</pre>";

	const char *BeginExpansionDiv = "<div class='expansion-view'>";

	const char *EndExpansionDiv = "</div>";

	const char *BeginTable = "<table>";

	const char *EndTable = "</table>";

	void emitPrelude(raw_ostream &OS) {
	OS << "<!doctype html>"
	"<html>"
	<< BeginHeader << CSSForCoverage << EndHeader << "<body>"
	<< BeginCenteredDiv;
	}

	void emitEpilog(raw_ostream &OS) {
	OS << EndCenteredDiv << "</body>"
	"</html>";
	}

	// Return a string with the special characters in \p Str escaped.
	std::string escape(StringRef Str) {
	std::string Result;
	for (char C : Str) {
	if (C == '&')
	Result += "&";
	else if (C == '<')
	Result += "<";
	else if (C == '>')
	Result += ">";
	else if (C == '\"')
	Result += """;
	else
	Result += C;
	}
	return Result;
	}

	// Create a \p Name tag around \p Str, and optionally set its \p ClassName.
	std::string tag(const std::string &Name, const std::string &Str,
	const std::string &ClassName = "") {
	std::string Tag = "<" + Name;
	if (ClassName != "")
	Tag += " class='" + ClassName + "'";
	return Tag + ">" + Str + "</" + Name + ">";
	}

	// Create an anchor to \p Link with the label \p Str.
	std::string a(const std::string &Link, const std::string &Str) {
	return "<a href='" + Link + "'>" + Str + "</a>";
	}

	} // anonymous namespace

	Expected<CoveragePrinter::OwnedStream>
	CoveragePrinterHTML::createViewFile(StringRef Path, bool InToplevel) {
	auto OSOrErr = createOutputStream(Path, "html", InToplevel);
	if (!OSOrErr)
	return OSOrErr;

	OwnedStream OS = std::move(OSOrErr.get());
	emitPrelude(*OS.get());
	return std::move(OS);
	}

	void CoveragePrinterHTML::closeViewFile(OwnedStream OS) {
	emitEpilog(*OS.get());
	}

	Error CoveragePrinterHTML::createIndexFile(ArrayRef<StringRef> SourceFiles) {
	auto OSOrErr = createOutputStream("index", "html", /InToplevel=/true);
	if (Error E = OSOrErr.takeError())
	return E;
	auto OS = std::move(OSOrErr.get());
	raw_ostream &OSRef = *OS.get();

	// Emit a table containing links to reports for each file in the covmapping.
	emitPrelude(OSRef);
	OSRef << BeginSourceNameDiv << "Index" << EndSourceNameDiv;
	OSRef << BeginTable;
	for (StringRef SF : SourceFiles) {
	std::string LinkText = escape(sys::path::relative_path(SF));
	std::string LinkTarget =
	escape(getOutputPath(SF, "html", /InToplevel=/false));
	OSRef << tag("tr", tag("td", tag("pre", a(LinkTarget, LinkText), "code")));
	}
	OSRef << EndTable;
	emitEpilog(OSRef);

	return Error::success();
	}

	void SourceCoverageViewHTML::renderViewHeader(raw_ostream &OS) {
	OS << BeginTable;
	}

	void SourceCoverageViewHTML::renderViewFooter(raw_ostream &OS) {
	OS << EndTable;
	}

	void SourceCoverageViewHTML::renderSourceName(raw_ostream &OS) {
	OS << BeginSourceNameDiv << tag("pre", escape(getSourceName()))
	<< EndSourceNameDiv;
	}

	void SourceCoverageViewHTML::renderLinePrefix(raw_ostream &OS, unsigned) {
	OS << "<tr>";
	}

	void SourceCoverageViewHTML::renderLineSuffix(raw_ostream &OS, unsigned) {
	// If this view has sub-views, renderLine() cannot close the view's cell.
	// Take care of it here, after all sub-views have been rendered.
	if (hasSubViews())
	OS << EndCodeTD;
	OS << "</tr>";
	}

	void SourceCoverageViewHTML::renderViewDivider(raw_ostream &, unsigned) {
	// The table-based output makes view dividers unnecessary.
	}

	void SourceCoverageViewHTML::renderLine(
	raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
	CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned) {
	StringRef Line = L.Line;

	// 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) {
	assert(Start + Len <= Line.size() && "Snippet extends past the EOL");
	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) {
	assert(LCol == Segments[I - 1]->Col && "Snippet start position is wrong");
	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);
	assert(LCol == Line.size() + 1 && "Final snippet doesn't reach the EOL");

	// 2. Escape all of the snippets.

	for (unsigned I = 0, E = Snippets.size(); I < E; ++I)
	Snippets[I] = escape(Snippets[I]);

	// 3. Use \p WrappedSegment to set the highlight for snippets 0 and 1. 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;
	auto Highlight = [&](const std::string &Snippet) {
	return tag("span", Snippet, Color.getValue());
	};

	auto CheckIfUncovered = [](const coverage::CoverageSegment *S) {
	return S && S->HasCount && S->Count == 0;
	};

	if (CheckIfUncovered(WrappedSegment) \|\|
	CheckIfUncovered(Segments.empty() ? nullptr : Segments.front())) {
	Color = "red";
	Snippets[0] = Highlight(Snippets[0]);
	Snippets[1] = Highlight(Snippets[1]);
	}

	for (unsigned I = 1, 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]);
	}

	// 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;
	}

	void SourceCoverageViewHTML::renderLineCoverageColumn(
	raw_ostream &OS, const LineCoverageStats &Line) {
	std::string Count = "";
	if (Line.isMapped())
	Count = tag("pre", formatCount(Line.ExecutionCount));
	std::string CoverageClass =
	(Line.ExecutionCount > 0) ? "covered-line" : "uncovered-line";
	OS << tag("td", Count, CoverageClass);
	}

	void SourceCoverageViewHTML::renderLineNumberColumn(raw_ostream &OS,
	unsigned LineNo) {
	OS << tag("td", tag("pre", utostr(uint64_t(LineNo))), "line-number");
	}

	void SourceCoverageViewHTML::renderRegionMarkers(raw_ostream &,
	CoverageSegmentArray,
	unsigned) {
	// Region markers are rendered in-line using tooltips.
	}

	void SourceCoverageViewHTML::renderExpansionSite(
	raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
	CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned ViewDepth) {
	// Render the line containing the expansion site. No extra formatting needed.
	renderLine(OS, L, WrappedSegment, Segments, ExpansionCol, ViewDepth);
	}

	void SourceCoverageViewHTML::renderExpansionView(raw_ostream &OS,
	ExpansionView &ESV,
	unsigned ViewDepth) {
	OS << BeginExpansionDiv;
	ESV.View->print(OS, /WholeFile=/false, /ShowSourceName=/false,
	ViewDepth + 1);
	OS << EndExpansionDiv;
	}

	void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS,
	InstantiationView &ISV,
	unsigned ViewDepth) {
	OS << BeginExpansionDiv;
	ISV.View->print(OS, /WholeFile=/false, /ShowSourceName=/true, ViewDepth);
	OS << EndExpansionDiv;
	}