1 //===--- HTMLPrint.cpp - Source code -> HTML pretty-printing --------------===// 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 // Pretty-printing of source code to HTML. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/AST/ASTConsumer.h" 15 #include "clang/AST/ASTContext.h" 16 #include "clang/AST/Decl.h" 17 #include "clang/Basic/Diagnostic.h" 18 #include "clang/Basic/FileManager.h" 19 #include "clang/Basic/SourceManager.h" 20 #include "clang/Lex/Preprocessor.h" 21 #include "clang/Rewrite/Core/HTMLRewrite.h" 22 #include "clang/Rewrite/Core/Rewriter.h" 23 #include "clang/Rewrite/Frontend/ASTConsumers.h" 24 #include "llvm/Support/raw_ostream.h" 25 using namespace clang; 26 27 //===----------------------------------------------------------------------===// 28 // Functional HTML pretty-printing. 29 //===----------------------------------------------------------------------===// 30 31 namespace { 32 class HTMLPrinter : public ASTConsumer { 33 Rewriter R; 34 std::unique_ptr<raw_ostream> Out; 35 Preprocessor &PP; 36 bool SyntaxHighlight, HighlightMacros; 37 38 public: 39 HTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &pp, 40 bool _SyntaxHighlight, bool _HighlightMacros) 41 : Out(std::move(OS)), PP(pp), SyntaxHighlight(_SyntaxHighlight), 42 HighlightMacros(_HighlightMacros) {} 43 44 void Initialize(ASTContext &context) override; 45 void HandleTranslationUnit(ASTContext &Ctx) override; 46 }; 47 } 48 49 std::unique_ptr<ASTConsumer> 50 clang::CreateHTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &PP, 51 bool SyntaxHighlight, bool HighlightMacros) { 52 return llvm::make_unique<HTMLPrinter>(std::move(OS), PP, SyntaxHighlight, 53 HighlightMacros); 54 } 55 56 void HTMLPrinter::Initialize(ASTContext &context) { 57 R.setSourceMgr(context.getSourceManager(), context.getLangOpts()); 58 } 59 60 void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) { 61 if (PP.getDiagnostics().hasErrorOccurred()) 62 return; 63 64 // Format the file. 65 FileID FID = R.getSourceMgr().getMainFileID(); 66 const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID); 67 StringRef Name; 68 // In some cases, in particular the case where the input is from stdin, 69 // there is no entry. Fall back to the memory buffer for a name in those 70 // cases. 71 if (Entry) 72 Name = Entry->getName(); 73 else 74 Name = R.getSourceMgr().getBuffer(FID)->getBufferIdentifier(); 75 76 html::AddLineNumbers(R, FID); 77 html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name); 78 79 // If we have a preprocessor, relex the file and syntax highlight. 80 // We might not have a preprocessor if we come from a deserialized AST file, 81 // for example. 82 83 if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP); 84 if (HighlightMacros) html::HighlightMacros(R, FID, PP); 85 html::EscapeText(R, FID, false, true); 86 87 // Emit the HTML. 88 const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID); 89 char *Buffer = (char*)malloc(RewriteBuf.size()); 90 std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer); 91 Out->write(Buffer, RewriteBuf.size()); 92 free(Buffer); 93 } 94