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|
//===- SourceCoverageViewHTML.cpp - A html code coverage view -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file This file implements the html coverage renderer.
///
//===----------------------------------------------------------------------===//
#include "CoverageReport.h"
#include "SourceCoverageViewHTML.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
using namespace llvm;
namespace {
// Return a string with the special characters in \p Str escaped.
std::string escape(StringRef Str, const CoverageViewOptions &Opts) {
std::string TabExpandedResult;
unsigned ColNum = 0; // Record the column number.
for (char C : Str) {
if (C == '\t') {
// Replace '\t' with up to TabSize spaces.
unsigned NumSpaces = Opts.TabSize - (ColNum % Opts.TabSize);
for (unsigned I = 0; I < NumSpaces; ++I)
TabExpandedResult += ' ';
ColNum += NumSpaces;
} else {
TabExpandedResult += C;
if (C == '\n' || C == '\r')
ColNum = 0;
else
++ColNum;
}
}
std::string EscapedHTML;
{
raw_string_ostream OS{EscapedHTML};
printHTMLEscaped(TabExpandedResult, OS);
}
return EscapedHTML;
}
// 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.empty())
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,
const std::string &TargetName = "") {
std::string Name = TargetName.empty() ? "" : ("name='" + TargetName + "' ");
return "<a " + Name + "href='" + Link + "'>" + Str + "</a>";
}
const char *BeginHeader =
"<head>"
"<meta name='viewport' content='width=device-width,initial-scale=1'>"
"<meta charset='UTF-8'>";
const char *CSSForCoverage =
R"(.red {
background-color: #ffd0d0;
}
.cyan {
background-color: cyan;
}
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;
line-height: 35px;
}
.centered {
display: table;
margin-left: left;
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;
}
.light-row {
background: #ffffff;
border: 1px solid #dbdbdb;
}
.light-row-bold {
background: #ffffff;
border: 1px solid #dbdbdb;
font-weight: bold;
}
.column-entry {
text-align: left;
}
.column-entry-bold {
font-weight: bold;
text-align: left;
}
.column-entry-yellow {
text-align: left;
background-color: #ffffd0;
}
.column-entry-yellow:hover {
background-color: #fffff0;
}
.column-entry-red {
text-align: left;
background-color: #ffd0d0;
}
.column-entry-red:hover {
background-color: #fff0f0;
}
.column-entry-green {
text-align: left;
background-color: #d0ffd0;
}
.column-entry-green:hover {
background-color: #f0fff0;
}
.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 8px;
border-collapse: collapse;
border-right: solid 1px #eee;
border-left: solid 1px #eee;
text-align: left;
}
td pre {
display: inline-block;
}
td:first-child {
border-left: none;
}
td:last-child {
border-right: none;
}
tr:hover {
background-color: #f0f0f0;
}
)";
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>";
const char *ProjectTitleTag = "h1";
const char *ReportTitleTag = "h2";
const char *CreatedTimeTag = "h4";
std::string getPathToStyle(StringRef ViewPath) {
std::string PathToStyle = "";
std::string PathSep = sys::path::get_separator();
unsigned NumSeps = ViewPath.count(PathSep);
for (unsigned I = 0, E = NumSeps; I < E; ++I)
PathToStyle += ".." + PathSep;
return PathToStyle + "style.css";
}
void emitPrelude(raw_ostream &OS, const CoverageViewOptions &Opts,
const std::string &PathToStyle = "") {
OS << "<!doctype html>"
"<html>"
<< BeginHeader;
// Link to a stylesheet if one is available. Otherwise, use the default style.
if (PathToStyle.empty())
OS << "<style>" << CSSForCoverage << "</style>";
else
OS << "<link rel='stylesheet' type='text/css' href='"
<< escape(PathToStyle, Opts) << "'>";
OS << EndHeader << "<body>";
}
void emitEpilog(raw_ostream &OS) {
OS << "</body>"
<< "</html>";
}
} // 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());
if (!Opts.hasOutputDirectory()) {
emitPrelude(*OS.get(), Opts);
} else {
std::string ViewPath = getOutputPath(Path, "html", InToplevel);
emitPrelude(*OS.get(), Opts, getPathToStyle(ViewPath));
}
return std::move(OS);
}
void CoveragePrinterHTML::closeViewFile(OwnedStream OS) {
emitEpilog(*OS.get());
}
/// Emit column labels for the table in the index.
static void emitColumnLabelsForIndex(raw_ostream &OS,
const CoverageViewOptions &Opts) {
SmallVector<std::string, 4> Columns;
Columns.emplace_back(tag("td", "Filename", "column-entry-bold"));
Columns.emplace_back(tag("td", "Function Coverage", "column-entry-bold"));
if (Opts.ShowInstantiationSummary)
Columns.emplace_back(
tag("td", "Instantiation Coverage", "column-entry-bold"));
Columns.emplace_back(tag("td", "Line Coverage", "column-entry-bold"));
if (Opts.ShowRegionSummary)
Columns.emplace_back(tag("td", "Region Coverage", "column-entry-bold"));
OS << tag("tr", join(Columns.begin(), Columns.end(), ""));
}
std::string
CoveragePrinterHTML::buildLinkToFile(StringRef SF,
const FileCoverageSummary &FCS) const {
SmallString<128> LinkTextStr(sys::path::relative_path(FCS.Name));
sys::path::remove_dots(LinkTextStr, /*remove_dot_dots=*/true);
sys::path::native(LinkTextStr);
std::string LinkText = escape(LinkTextStr, Opts);
std::string LinkTarget =
escape(getOutputPath(SF, "html", /*InToplevel=*/false), Opts);
return a(LinkTarget, LinkText);
}
/// Render a file coverage summary (\p FCS) in a table row. If \p IsTotals is
/// false, link the summary to \p SF.
void CoveragePrinterHTML::emitFileSummary(raw_ostream &OS, StringRef SF,
const FileCoverageSummary &FCS,
bool IsTotals) const {
SmallVector<std::string, 8> Columns;
// Format a coverage triple and add the result to the list of columns.
auto AddCoverageTripleToColumn = [&Columns](unsigned Hit, unsigned Total,
float Pctg) {
std::string S;
{
raw_string_ostream RSO{S};
if (Total)
RSO << format("%*.2f", 7, Pctg) << "% ";
else
RSO << "- ";
RSO << '(' << Hit << '/' << Total << ')';
}
const char *CellClass = "column-entry-yellow";
if (Hit == Total)
CellClass = "column-entry-green";
else if (Pctg < 80.0)
CellClass = "column-entry-red";
Columns.emplace_back(tag("td", tag("pre", S), CellClass));
};
// Simplify the display file path, and wrap it in a link if requested.
std::string Filename;
if (IsTotals) {
Filename = SF;
} else {
Filename = buildLinkToFile(SF, FCS);
}
Columns.emplace_back(tag("td", tag("pre", Filename)));
AddCoverageTripleToColumn(FCS.FunctionCoverage.getExecuted(),
FCS.FunctionCoverage.getNumFunctions(),
FCS.FunctionCoverage.getPercentCovered());
if (Opts.ShowInstantiationSummary)
AddCoverageTripleToColumn(FCS.InstantiationCoverage.getExecuted(),
FCS.InstantiationCoverage.getNumFunctions(),
FCS.InstantiationCoverage.getPercentCovered());
AddCoverageTripleToColumn(FCS.LineCoverage.getCovered(),
FCS.LineCoverage.getNumLines(),
FCS.LineCoverage.getPercentCovered());
if (Opts.ShowRegionSummary)
AddCoverageTripleToColumn(FCS.RegionCoverage.getCovered(),
FCS.RegionCoverage.getNumRegions(),
FCS.RegionCoverage.getPercentCovered());
if (IsTotals)
OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row-bold");
else
OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row");
}
Error CoveragePrinterHTML::createIndexFile(
ArrayRef<std::string> SourceFiles, const CoverageMapping &Coverage,
const CoverageFiltersMatchAll &Filters) {
// Emit the default stylesheet.
auto CSSOrErr = createOutputStream("style", "css", /*InToplevel=*/true);
if (Error E = CSSOrErr.takeError())
return E;
OwnedStream CSS = std::move(CSSOrErr.get());
CSS->operator<<(CSSForCoverage);
// Emit a file index along with some coverage statistics.
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();
assert(Opts.hasOutputDirectory() && "No output directory for index file");
emitPrelude(OSRef, Opts, getPathToStyle(""));
// Emit some basic information about the coverage report.
if (Opts.hasProjectTitle())
OSRef << tag(ProjectTitleTag, escape(Opts.ProjectTitle, Opts));
OSRef << tag(ReportTitleTag, "Coverage Report");
if (Opts.hasCreatedTime())
OSRef << tag(CreatedTimeTag, escape(Opts.CreatedTimeStr, Opts));
// Emit a link to some documentation.
OSRef << tag("p", "Click " +
a("http://clang.llvm.org/docs/"
"SourceBasedCodeCoverage.html#interpreting-reports",
"here") +
" for information about interpreting this report.");
// Emit a table containing links to reports for each file in the covmapping.
// Exclude files which don't contain any regions.
OSRef << BeginCenteredDiv << BeginTable;
emitColumnLabelsForIndex(OSRef, Opts);
FileCoverageSummary Totals("TOTALS");
auto FileReports = CoverageReport::prepareFileReports(
Coverage, Totals, SourceFiles, Opts, Filters);
bool EmptyFiles = false;
for (unsigned I = 0, E = FileReports.size(); I < E; ++I) {
if (FileReports[I].FunctionCoverage.getNumFunctions())
emitFileSummary(OSRef, SourceFiles[I], FileReports[I]);
else
EmptyFiles = true;
}
emitFileSummary(OSRef, "Totals", Totals, /*IsTotals=*/true);
OSRef << EndTable << EndCenteredDiv;
// Emit links to files which don't contain any functions. These are normally
// not very useful, but could be relevant for code which abuses the
// preprocessor.
if (EmptyFiles && Filters.empty()) {
OSRef << tag("p", "Files which contain no functions. (These "
"files contain code pulled into other files "
"by the preprocessor.)\n");
OSRef << BeginCenteredDiv << BeginTable;
for (unsigned I = 0, E = FileReports.size(); I < E; ++I)
if (!FileReports[I].FunctionCoverage.getNumFunctions()) {
std::string Link = buildLinkToFile(SourceFiles[I], FileReports[I]);
OSRef << tag("tr", tag("td", tag("pre", Link)), "light-row") << '\n';
}
OSRef << EndTable << EndCenteredDiv;
}
OSRef << tag("h5", escape(Opts.getLLVMVersionString(), Opts));
emitEpilog(OSRef);
return Error::success();
}
void SourceCoverageViewHTML::renderViewHeader(raw_ostream &OS) {
OS << BeginCenteredDiv << BeginTable;
}
void SourceCoverageViewHTML::renderViewFooter(raw_ostream &OS) {
OS << EndTable << EndCenteredDiv;
}
void SourceCoverageViewHTML::renderSourceName(raw_ostream &OS, bool WholeFile) {
OS << BeginSourceNameDiv << tag("pre", escape(getSourceName(), getOptions()))
<< 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 LineCoverageStats &LCS,
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;
CoverageSegmentArray Segments = LCS.getLineSegments();
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<StringRef> 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 CoverageSegment *S) {
return S && (!S->IsGapRegion || (Color && *Color == "red")) &&
S->HasCount && S->Count == 0;
};
if (CheckIfUncovered(LCS.getWrappedSegment())) {
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 (CheckIfUncovered(CurSeg))
Color = "red";
else if (CurSeg->Col == ExpansionCol)
Color = "cyan";
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.
if (shouldRenderRegionMarkers(LCS)) {
// Just consider the segments which start *and* end on this line.
for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) {
const auto *CurSeg = Segments[I];
if (!CurSeg->IsRegionEntry)
continue;
if (CurSeg->Count == LCS.getExecutionCount())
continue;
Snippets[I + 1] =
tag("div", Snippets[I + 1] + tag("span", formatCount(CurSeg->Count),
"tooltip-content"),
"tooltip");
if (getOptions().Debug)
errs() << "Marker at " << CurSeg->Line << ":" << CurSeg->Col << " = "
<< formatCount(CurSeg->Count) << "\n";
}
}
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.getExecutionCount()));
std::string CoverageClass =
(Line.getExecutionCount() > 0) ? "covered-line" : "uncovered-line";
OS << tag("td", Count, CoverageClass);
}
void SourceCoverageViewHTML::renderLineNumberColumn(raw_ostream &OS,
unsigned LineNo) {
std::string LineNoStr = utostr(uint64_t(LineNo));
std::string TargetName = "L" + LineNoStr;
OS << tag("td", a("#" + TargetName, tag("pre", LineNoStr), TargetName),
"line-number");
}
void SourceCoverageViewHTML::renderRegionMarkers(raw_ostream &,
const LineCoverageStats &Line,
unsigned) {
// Region markers are rendered in-line using tooltips.
}
void SourceCoverageViewHTML::renderExpansionSite(raw_ostream &OS, LineRef L,
const LineCoverageStats &LCS,
unsigned ExpansionCol,
unsigned ViewDepth) {
// Render the line containing the expansion site. No extra formatting needed.
renderLine(OS, L, LCS, ExpansionCol, ViewDepth);
}
void SourceCoverageViewHTML::renderExpansionView(raw_ostream &OS,
ExpansionView &ESV,
unsigned ViewDepth) {
OS << BeginExpansionDiv;
ESV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/false,
/*ShowTitle=*/false, ViewDepth + 1);
OS << EndExpansionDiv;
}
void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS,
InstantiationView &ISV,
unsigned ViewDepth) {
OS << BeginExpansionDiv;
if (!ISV.View)
OS << BeginSourceNameDiv
<< tag("pre",
escape("Unexecuted instantiation: " + ISV.FunctionName.str(),
getOptions()))
<< EndSourceNameDiv;
else
ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true,
/*ShowTitle=*/false, ViewDepth);
OS << EndExpansionDiv;
}
void SourceCoverageViewHTML::renderTitle(raw_ostream &OS, StringRef Title) {
if (getOptions().hasProjectTitle())
OS << tag(ProjectTitleTag, escape(getOptions().ProjectTitle, getOptions()));
OS << tag(ReportTitleTag, escape(Title, getOptions()));
if (getOptions().hasCreatedTime())
OS << tag(CreatedTimeTag,
escape(getOptions().CreatedTimeStr, getOptions()));
}
void SourceCoverageViewHTML::renderTableHeader(raw_ostream &OS,
unsigned FirstUncoveredLineNo,
unsigned ViewDepth) {
std::string SourceLabel;
if (FirstUncoveredLineNo == 0) {
SourceLabel = tag("td", tag("pre", "Source"));
} else {
std::string LinkTarget = "#L" + utostr(uint64_t(FirstUncoveredLineNo));
SourceLabel =
tag("td", tag("pre", "Source (" +
a(LinkTarget, "jump to first uncovered line") +
")"));
}
renderLinePrefix(OS, ViewDepth);
OS << tag("td", tag("pre", "Line")) << tag("td", tag("pre", "Count"))
<< SourceLabel;
renderLineSuffix(OS, ViewDepth);
}
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