1 //===- SourceCoverageViewHTML.cpp - A html code coverage view -------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// 10 /// \file This file implements the html coverage renderer. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "CoverageReport.h" 15 #include "SourceCoverageViewHTML.h" 16 #include "llvm/ADT/Optional.h" 17 #include "llvm/ADT/SmallString.h" 18 #include "llvm/ADT/StringExtras.h" 19 #include "llvm/Support/FileSystem.h" 20 #include "llvm/Support/Format.h" 21 #include "llvm/Support/Path.h" 22 23 using namespace llvm; 24 25 namespace { 26 27 // Return a string with the special characters in \p Str escaped. 28 std::string escape(StringRef Str, const CoverageViewOptions &Opts) { 29 std::string Result; 30 unsigned ColNum = 0; // Record the column number. 31 for (char C : Str) { 32 ++ColNum; 33 if (C == '&') 34 Result += "&"; 35 else if (C == '<') 36 Result += "<"; 37 else if (C == '>') 38 Result += ">"; 39 else if (C == '\"') 40 Result += """; 41 else if (C == '\n' || C == '\r') { 42 Result += C; 43 ColNum = 0; 44 } else if (C == '\t') { 45 // Replace '\t' with TabSize spaces. 46 unsigned NumSpaces = Opts.TabSize - (--ColNum % Opts.TabSize); 47 for (unsigned I = 0; I < NumSpaces; ++I) 48 Result += " "; 49 ColNum += NumSpaces; 50 } else 51 Result += C; 52 } 53 return Result; 54 } 55 56 // Create a \p Name tag around \p Str, and optionally set its \p ClassName. 57 std::string tag(const std::string &Name, const std::string &Str, 58 const std::string &ClassName = "") { 59 std::string Tag = "<" + Name; 60 if (ClassName != "") 61 Tag += " class='" + ClassName + "'"; 62 return Tag + ">" + Str + "</" + Name + ">"; 63 } 64 65 // Create an anchor to \p Link with the label \p Str. 66 std::string a(const std::string &Link, const std::string &Str, 67 const std::string &TargetName = "") { 68 std::string Name = TargetName.empty() ? "" : ("name='" + TargetName + "' "); 69 return "<a " + Name + "href='" + Link + "'>" + Str + "</a>"; 70 } 71 72 const char *BeginHeader = 73 "<head>" 74 "<meta name='viewport' content='width=device-width,initial-scale=1'>" 75 "<meta charset='UTF-8'>"; 76 77 const char *CSSForCoverage = 78 R"(.red { 79 background-color: #ffd0d0; 80 } 81 .cyan { 82 background-color: cyan; 83 } 84 body { 85 font-family: -apple-system, sans-serif; 86 } 87 pre { 88 margin-top: 0px !important; 89 margin-bottom: 0px !important; 90 } 91 .source-name-title { 92 padding: 5px 10px; 93 border-bottom: 1px solid #dbdbdb; 94 background-color: #eee; 95 line-height: 35px; 96 } 97 .centered { 98 display: table; 99 margin-left: left; 100 margin-right: auto; 101 border: 1px solid #dbdbdb; 102 border-radius: 3px; 103 } 104 .expansion-view { 105 background-color: rgba(0, 0, 0, 0); 106 margin-left: 0px; 107 margin-top: 5px; 108 margin-right: 5px; 109 margin-bottom: 5px; 110 border: 1px solid #dbdbdb; 111 border-radius: 3px; 112 } 113 table { 114 border-collapse: collapse; 115 } 116 .light-row { 117 background: #ffffff; 118 border: 1px solid #dbdbdb; 119 } 120 .column-entry { 121 text-align: right; 122 } 123 .column-entry-left { 124 text-align: left; 125 } 126 .column-entry-yellow { 127 text-align: right; 128 background-color: #ffffd0; 129 } 130 .column-entry-red { 131 text-align: right; 132 background-color: #ffd0d0; 133 } 134 .column-entry-green { 135 text-align: right; 136 background-color: #d0ffd0; 137 } 138 .line-number { 139 text-align: right; 140 color: #aaa; 141 } 142 .covered-line { 143 text-align: right; 144 color: #0080ff; 145 } 146 .uncovered-line { 147 text-align: right; 148 color: #ff3300; 149 } 150 .tooltip { 151 position: relative; 152 display: inline; 153 background-color: #b3e6ff; 154 text-decoration: none; 155 } 156 .tooltip span.tooltip-content { 157 position: absolute; 158 width: 100px; 159 margin-left: -50px; 160 color: #FFFFFF; 161 background: #000000; 162 height: 30px; 163 line-height: 30px; 164 text-align: center; 165 visibility: hidden; 166 border-radius: 6px; 167 } 168 .tooltip span.tooltip-content:after { 169 content: ''; 170 position: absolute; 171 top: 100%; 172 left: 50%; 173 margin-left: -8px; 174 width: 0; height: 0; 175 border-top: 8px solid #000000; 176 border-right: 8px solid transparent; 177 border-left: 8px solid transparent; 178 } 179 :hover.tooltip span.tooltip-content { 180 visibility: visible; 181 opacity: 0.8; 182 bottom: 30px; 183 left: 50%; 184 z-index: 999; 185 } 186 th, td { 187 vertical-align: top; 188 padding: 2px 5px; 189 border-collapse: collapse; 190 border-right: solid 1px #eee; 191 border-left: solid 1px #eee; 192 } 193 td:first-child { 194 border-left: none; 195 } 196 td:last-child { 197 border-right: none; 198 } 199 )"; 200 201 const char *EndHeader = "</head>"; 202 203 const char *BeginCenteredDiv = "<div class='centered'>"; 204 205 const char *EndCenteredDiv = "</div>"; 206 207 const char *BeginSourceNameDiv = "<div class='source-name-title'>"; 208 209 const char *EndSourceNameDiv = "</div>"; 210 211 const char *BeginCodeTD = "<td class='code'>"; 212 213 const char *EndCodeTD = "</td>"; 214 215 const char *BeginPre = "<pre>"; 216 217 const char *EndPre = "</pre>"; 218 219 const char *BeginExpansionDiv = "<div class='expansion-view'>"; 220 221 const char *EndExpansionDiv = "</div>"; 222 223 const char *BeginTable = "<table>"; 224 225 const char *EndTable = "</table>"; 226 227 const char *ProjectTitleTag = "h1"; 228 229 const char *ReportTitleTag = "h2"; 230 231 const char *CreatedTimeTag = "h4"; 232 233 std::string getPathToStyle(StringRef ViewPath) { 234 std::string PathToStyle = ""; 235 std::string PathSep = sys::path::get_separator(); 236 unsigned NumSeps = ViewPath.count(PathSep); 237 for (unsigned I = 0, E = NumSeps; I < E; ++I) 238 PathToStyle += ".." + PathSep; 239 return PathToStyle + "style.css"; 240 } 241 242 void emitPrelude(raw_ostream &OS, const CoverageViewOptions &Opts, 243 const std::string &PathToStyle = "") { 244 OS << "<!doctype html>" 245 "<html>" 246 << BeginHeader; 247 248 // Link to a stylesheet if one is available. Otherwise, use the default style. 249 if (PathToStyle.empty()) 250 OS << "<style>" << CSSForCoverage << "</style>"; 251 else 252 OS << "<link rel='stylesheet' type='text/css' href='" 253 << escape(PathToStyle, Opts) << "'>"; 254 255 OS << EndHeader << "<body>"; 256 } 257 258 void emitEpilog(raw_ostream &OS) { 259 OS << "</body>" 260 << "</html>"; 261 } 262 263 } // anonymous namespace 264 265 Expected<CoveragePrinter::OwnedStream> 266 CoveragePrinterHTML::createViewFile(StringRef Path, bool InToplevel) { 267 auto OSOrErr = createOutputStream(Path, "html", InToplevel); 268 if (!OSOrErr) 269 return OSOrErr; 270 271 OwnedStream OS = std::move(OSOrErr.get()); 272 273 if (!Opts.hasOutputDirectory()) { 274 emitPrelude(*OS.get(), Opts); 275 } else { 276 std::string ViewPath = getOutputPath(Path, "html", InToplevel); 277 emitPrelude(*OS.get(), Opts, getPathToStyle(ViewPath)); 278 } 279 280 return std::move(OS); 281 } 282 283 void CoveragePrinterHTML::closeViewFile(OwnedStream OS) { 284 emitEpilog(*OS.get()); 285 } 286 287 /// Emit column labels for the table in the index. 288 static void emitColumnLabelsForIndex(raw_ostream &OS, 289 const CoverageViewOptions &Opts) { 290 SmallVector<std::string, 4> Columns; 291 Columns.emplace_back(tag("td", "Filename", "column-entry-left")); 292 Columns.emplace_back(tag("td", "Function Coverage", "column-entry")); 293 if (Opts.ShowInstantiationSummary) 294 Columns.emplace_back(tag("td", "Instantiation Coverage", "column-entry")); 295 Columns.emplace_back(tag("td", "Line Coverage", "column-entry")); 296 if (Opts.ShowRegionSummary) 297 Columns.emplace_back(tag("td", "Region Coverage", "column-entry")); 298 OS << tag("tr", join(Columns.begin(), Columns.end(), "")); 299 } 300 301 std::string 302 CoveragePrinterHTML::buildLinkToFile(StringRef SF, 303 const FileCoverageSummary &FCS) const { 304 SmallString<128> LinkTextStr(sys::path::relative_path(FCS.Name)); 305 sys::path::remove_dots(LinkTextStr, /*remove_dot_dots=*/true); 306 sys::path::native(LinkTextStr); 307 std::string LinkText = escape(LinkTextStr, Opts); 308 std::string LinkTarget = 309 escape(getOutputPath(SF, "html", /*InToplevel=*/false), Opts); 310 return a(LinkTarget, LinkText); 311 } 312 313 /// Render a file coverage summary (\p FCS) in a table row. If \p IsTotals is 314 /// false, link the summary to \p SF. 315 void CoveragePrinterHTML::emitFileSummary(raw_ostream &OS, StringRef SF, 316 const FileCoverageSummary &FCS, 317 bool IsTotals) const { 318 SmallVector<std::string, 8> Columns; 319 320 // Format a coverage triple and add the result to the list of columns. 321 auto AddCoverageTripleToColumn = [&Columns](unsigned Hit, unsigned Total, 322 float Pctg) { 323 std::string S; 324 { 325 raw_string_ostream RSO{S}; 326 if (Total) 327 RSO << format("%*.2f", 7, Pctg) << "% "; 328 else 329 RSO << "- "; 330 RSO << '(' << Hit << '/' << Total << ')'; 331 } 332 const char *CellClass = "column-entry-yellow"; 333 if (Hit == Total) 334 CellClass = "column-entry-green"; 335 else if (Pctg < 80.0) 336 CellClass = "column-entry-red"; 337 Columns.emplace_back(tag("td", tag("pre", S), CellClass)); 338 }; 339 340 // Simplify the display file path, and wrap it in a link if requested. 341 std::string Filename; 342 if (IsTotals) { 343 Filename = "TOTALS"; 344 } else { 345 Filename = buildLinkToFile(SF, FCS); 346 } 347 348 Columns.emplace_back(tag("td", tag("pre", Filename))); 349 AddCoverageTripleToColumn(FCS.FunctionCoverage.getExecuted(), 350 FCS.FunctionCoverage.getNumFunctions(), 351 FCS.FunctionCoverage.getPercentCovered()); 352 if (Opts.ShowInstantiationSummary) 353 AddCoverageTripleToColumn(FCS.InstantiationCoverage.getExecuted(), 354 FCS.InstantiationCoverage.getNumFunctions(), 355 FCS.InstantiationCoverage.getPercentCovered()); 356 AddCoverageTripleToColumn(FCS.LineCoverage.getCovered(), 357 FCS.LineCoverage.getNumLines(), 358 FCS.LineCoverage.getPercentCovered()); 359 if (Opts.ShowRegionSummary) 360 AddCoverageTripleToColumn(FCS.RegionCoverage.getCovered(), 361 FCS.RegionCoverage.getNumRegions(), 362 FCS.RegionCoverage.getPercentCovered()); 363 364 OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row"); 365 } 366 367 Error CoveragePrinterHTML::createIndexFile( 368 ArrayRef<std::string> SourceFiles, 369 const coverage::CoverageMapping &Coverage) { 370 // Emit the default stylesheet. 371 auto CSSOrErr = createOutputStream("style", "css", /*InToplevel=*/true); 372 if (Error E = CSSOrErr.takeError()) 373 return E; 374 375 OwnedStream CSS = std::move(CSSOrErr.get()); 376 CSS->operator<<(CSSForCoverage); 377 378 // Emit a file index along with some coverage statistics. 379 auto OSOrErr = createOutputStream("index", "html", /*InToplevel=*/true); 380 if (Error E = OSOrErr.takeError()) 381 return E; 382 auto OS = std::move(OSOrErr.get()); 383 raw_ostream &OSRef = *OS.get(); 384 385 assert(Opts.hasOutputDirectory() && "No output directory for index file"); 386 emitPrelude(OSRef, Opts, getPathToStyle("")); 387 388 // Emit some basic information about the coverage report. 389 if (Opts.hasProjectTitle()) 390 OSRef << tag(ProjectTitleTag, escape(Opts.ProjectTitle, Opts)); 391 OSRef << tag(ReportTitleTag, "Coverage Report"); 392 if (Opts.hasCreatedTime()) 393 OSRef << tag(CreatedTimeTag, escape(Opts.CreatedTimeStr, Opts)); 394 395 // Emit a link to some documentation. 396 OSRef << tag("p", "Click " + 397 a("http://clang.llvm.org/docs/" 398 "SourceBasedCodeCoverage.html#interpreting-reports", 399 "here") + 400 " for information about interpreting this report."); 401 402 // Emit a table containing links to reports for each file in the covmapping. 403 // Exclude files which don't contain any regions. 404 OSRef << BeginCenteredDiv << BeginTable; 405 emitColumnLabelsForIndex(OSRef, Opts); 406 FileCoverageSummary Totals("TOTALS"); 407 auto FileReports = 408 CoverageReport::prepareFileReports(Coverage, Totals, SourceFiles, Opts); 409 bool EmptyFiles = false; 410 for (unsigned I = 0, E = FileReports.size(); I < E; ++I) { 411 if (FileReports[I].FunctionCoverage.getNumFunctions()) 412 emitFileSummary(OSRef, SourceFiles[I], FileReports[I]); 413 else 414 EmptyFiles = true; 415 } 416 emitFileSummary(OSRef, "Totals", Totals, /*IsTotals=*/true); 417 OSRef << EndTable << EndCenteredDiv; 418 419 // Emit links to files which don't contain any functions. These are normally 420 // not very useful, but could be relevant for code which abuses the 421 // preprocessor. 422 if (EmptyFiles) { 423 OSRef << tag("p", "Files which contain no functions. (These " 424 "files contain code pulled into other files " 425 "by the preprocessor.)\n"); 426 OSRef << BeginCenteredDiv << BeginTable; 427 for (unsigned I = 0, E = FileReports.size(); I < E; ++I) 428 if (!FileReports[I].FunctionCoverage.getNumFunctions()) { 429 std::string Link = buildLinkToFile(SourceFiles[I], FileReports[I]); 430 OSRef << tag("tr", tag("td", tag("pre", Link)), "light-row") << '\n'; 431 } 432 OSRef << EndTable << EndCenteredDiv; 433 } 434 435 OSRef << tag("h5", escape(Opts.getLLVMVersionString(), Opts)); 436 emitEpilog(OSRef); 437 438 return Error::success(); 439 } 440 441 void SourceCoverageViewHTML::renderViewHeader(raw_ostream &OS) { 442 OS << BeginCenteredDiv << BeginTable; 443 } 444 445 void SourceCoverageViewHTML::renderViewFooter(raw_ostream &OS) { 446 OS << EndTable << EndCenteredDiv; 447 } 448 449 void SourceCoverageViewHTML::renderSourceName(raw_ostream &OS, bool WholeFile) { 450 OS << BeginSourceNameDiv << tag("pre", escape(getSourceName(), getOptions())) 451 << EndSourceNameDiv; 452 } 453 454 void SourceCoverageViewHTML::renderLinePrefix(raw_ostream &OS, unsigned) { 455 OS << "<tr>"; 456 } 457 458 void SourceCoverageViewHTML::renderLineSuffix(raw_ostream &OS, unsigned) { 459 // If this view has sub-views, renderLine() cannot close the view's cell. 460 // Take care of it here, after all sub-views have been rendered. 461 if (hasSubViews()) 462 OS << EndCodeTD; 463 OS << "</tr>"; 464 } 465 466 void SourceCoverageViewHTML::renderViewDivider(raw_ostream &, unsigned) { 467 // The table-based output makes view dividers unnecessary. 468 } 469 470 void SourceCoverageViewHTML::renderLine( 471 raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment, 472 CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned) { 473 StringRef Line = L.Line; 474 unsigned LineNo = L.LineNo; 475 476 // Steps for handling text-escaping, highlighting, and tooltip creation: 477 // 478 // 1. Split the line into N+1 snippets, where N = |Segments|. The first 479 // snippet starts from Col=1 and ends at the start of the first segment. 480 // The last snippet starts at the last mapped column in the line and ends 481 // at the end of the line. Both are required but may be empty. 482 483 SmallVector<std::string, 8> Snippets; 484 485 unsigned LCol = 1; 486 auto Snip = [&](unsigned Start, unsigned Len) { 487 Snippets.push_back(Line.substr(Start, Len)); 488 LCol += Len; 489 }; 490 491 Snip(LCol - 1, Segments.empty() ? 0 : (Segments.front()->Col - 1)); 492 493 for (unsigned I = 1, E = Segments.size(); I < E; ++I) 494 Snip(LCol - 1, Segments[I]->Col - LCol); 495 496 // |Line| + 1 is needed to avoid underflow when, e.g |Line| = 0 and LCol = 1. 497 Snip(LCol - 1, Line.size() + 1 - LCol); 498 499 // 2. Escape all of the snippets. 500 501 for (unsigned I = 0, E = Snippets.size(); I < E; ++I) 502 Snippets[I] = escape(Snippets[I], getOptions()); 503 504 // 3. Use \p WrappedSegment to set the highlight for snippet 0. Use segment 505 // 1 to set the highlight for snippet 2, segment 2 to set the highlight for 506 // snippet 3, and so on. 507 508 Optional<std::string> Color; 509 SmallVector<std::pair<unsigned, unsigned>, 2> HighlightedRanges; 510 auto Highlight = [&](const std::string &Snippet, unsigned LC, unsigned RC) { 511 if (getOptions().Debug) 512 HighlightedRanges.emplace_back(LC, RC); 513 return tag("span", Snippet, Color.getValue()); 514 }; 515 516 auto CheckIfUncovered = [](const coverage::CoverageSegment *S) { 517 return S && S->HasCount && S->Count == 0; 518 }; 519 520 if (CheckIfUncovered(WrappedSegment)) { 521 Color = "red"; 522 if (!Snippets[0].empty()) 523 Snippets[0] = Highlight(Snippets[0], 1, 1 + Snippets[0].size()); 524 } 525 526 for (unsigned I = 0, E = Segments.size(); I < E; ++I) { 527 const auto *CurSeg = Segments[I]; 528 if (CurSeg->Col == ExpansionCol) 529 Color = "cyan"; 530 else if (CheckIfUncovered(CurSeg)) 531 Color = "red"; 532 else 533 Color = None; 534 535 if (Color.hasValue()) 536 Snippets[I + 1] = Highlight(Snippets[I + 1], CurSeg->Col, 537 CurSeg->Col + Snippets[I + 1].size()); 538 } 539 540 if (Color.hasValue() && Segments.empty()) 541 Snippets.back() = Highlight(Snippets.back(), 1, 1 + Snippets.back().size()); 542 543 if (getOptions().Debug) { 544 for (const auto &Range : HighlightedRanges) { 545 errs() << "Highlighted line " << LineNo << ", " << Range.first << " -> "; 546 if (Range.second == 0) 547 errs() << "?"; 548 else 549 errs() << Range.second; 550 errs() << "\n"; 551 } 552 } 553 554 // 4. Snippets[1:N+1] correspond to \p Segments[0:N]: use these to generate 555 // sub-line region count tooltips if needed. 556 557 if (shouldRenderRegionMarkers(Segments)) { 558 // Just consider the segments which start *and* end on this line. 559 for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) { 560 const auto *CurSeg = Segments[I]; 561 if (!CurSeg->IsRegionEntry) 562 continue; 563 564 Snippets[I + 1] = 565 tag("div", Snippets[I + 1] + tag("span", formatCount(CurSeg->Count), 566 "tooltip-content"), 567 "tooltip"); 568 569 if (getOptions().Debug) 570 errs() << "Marker at " << CurSeg->Line << ":" << CurSeg->Col << " = " 571 << formatCount(CurSeg->Count) << "\n"; 572 } 573 } 574 575 OS << BeginCodeTD; 576 OS << BeginPre; 577 for (const auto &Snippet : Snippets) 578 OS << Snippet; 579 OS << EndPre; 580 581 // If there are no sub-views left to attach to this cell, end the cell. 582 // Otherwise, end it after the sub-views are rendered (renderLineSuffix()). 583 if (!hasSubViews()) 584 OS << EndCodeTD; 585 } 586 587 void SourceCoverageViewHTML::renderLineCoverageColumn( 588 raw_ostream &OS, const LineCoverageStats &Line) { 589 std::string Count = ""; 590 if (Line.isMapped()) 591 Count = tag("pre", formatCount(Line.ExecutionCount)); 592 std::string CoverageClass = 593 (Line.ExecutionCount > 0) ? "covered-line" : "uncovered-line"; 594 OS << tag("td", Count, CoverageClass); 595 } 596 597 void SourceCoverageViewHTML::renderLineNumberColumn(raw_ostream &OS, 598 unsigned LineNo) { 599 std::string LineNoStr = utostr(uint64_t(LineNo)); 600 std::string TargetName = "L" + LineNoStr; 601 OS << tag("td", a("#" + TargetName, tag("pre", LineNoStr), TargetName), 602 "line-number"); 603 } 604 605 void SourceCoverageViewHTML::renderRegionMarkers(raw_ostream &, 606 CoverageSegmentArray, 607 unsigned) { 608 // Region markers are rendered in-line using tooltips. 609 } 610 611 void SourceCoverageViewHTML::renderExpansionSite( 612 raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment, 613 CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned ViewDepth) { 614 // Render the line containing the expansion site. No extra formatting needed. 615 renderLine(OS, L, WrappedSegment, Segments, ExpansionCol, ViewDepth); 616 } 617 618 void SourceCoverageViewHTML::renderExpansionView(raw_ostream &OS, 619 ExpansionView &ESV, 620 unsigned ViewDepth) { 621 OS << BeginExpansionDiv; 622 ESV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/false, 623 ViewDepth + 1); 624 OS << EndExpansionDiv; 625 } 626 627 void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS, 628 InstantiationView &ISV, 629 unsigned ViewDepth) { 630 OS << BeginExpansionDiv; 631 if (!ISV.View) 632 OS << BeginSourceNameDiv 633 << tag("pre", 634 escape("Unexecuted instantiation: " + ISV.FunctionName.str(), 635 getOptions())) 636 << EndSourceNameDiv; 637 else 638 ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true, 639 ViewDepth); 640 OS << EndExpansionDiv; 641 } 642 643 void SourceCoverageViewHTML::renderTitle(raw_ostream &OS, StringRef Title) { 644 if (getOptions().hasProjectTitle()) 645 OS << tag(ProjectTitleTag, escape(getOptions().ProjectTitle, getOptions())); 646 OS << tag(ReportTitleTag, escape(Title, getOptions())); 647 if (getOptions().hasCreatedTime()) 648 OS << tag(CreatedTimeTag, 649 escape(getOptions().CreatedTimeStr, getOptions())); 650 } 651 652 void SourceCoverageViewHTML::renderTableHeader(raw_ostream &OS, 653 unsigned FirstUncoveredLineNo, 654 unsigned ViewDepth) { 655 std::string SourceLabel; 656 if (FirstUncoveredLineNo == 0) { 657 SourceLabel = tag("td", tag("pre", "Source")); 658 } else { 659 std::string LinkTarget = "#L" + utostr(uint64_t(FirstUncoveredLineNo)); 660 SourceLabel = 661 tag("td", tag("pre", "Source (" + 662 a(LinkTarget, "jump to first uncovered line") + 663 ")")); 664 } 665 666 renderLinePrefix(OS, ViewDepth); 667 OS << tag("td", tag("pre", "Line")) << tag("td", tag("pre", "Count")) 668 << SourceLabel; 669 renderLineSuffix(OS, ViewDepth); 670 } 671