1 //===--- HTMLPrint.cpp - Source code -> HTML pretty-printing --------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Pretty-printing of source code to HTML. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/AST/ASTConsumer.h" 14 #include "clang/AST/ASTContext.h" 15 #include "clang/AST/Decl.h" 16 #include "clang/Basic/Diagnostic.h" 17 #include "clang/Basic/FileManager.h" 18 #include "clang/Basic/SourceManager.h" 19 #include "clang/Lex/Preprocessor.h" 20 #include "clang/Rewrite/Core/HTMLRewrite.h" 21 #include "clang/Rewrite/Core/Rewriter.h" 22 #include "clang/Rewrite/Frontend/ASTConsumers.h" 23 #include "llvm/Support/raw_ostream.h" 24 using namespace clang; 25 26 //===----------------------------------------------------------------------===// 27 // Functional HTML pretty-printing. 28 //===----------------------------------------------------------------------===// 29 30 namespace { 31 class HTMLPrinter : public ASTConsumer { 32 Rewriter R; 33 std::unique_ptr<raw_ostream> Out; 34 Preprocessor &PP; 35 bool SyntaxHighlight, HighlightMacros; 36 37 public: 38 HTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &pp, 39 bool _SyntaxHighlight, bool _HighlightMacros) 40 : Out(std::move(OS)), PP(pp), SyntaxHighlight(_SyntaxHighlight), 41 HighlightMacros(_HighlightMacros) {} 42 43 void Initialize(ASTContext &context) override; 44 void HandleTranslationUnit(ASTContext &Ctx) override; 45 }; 46 } 47 48 std::unique_ptr<ASTConsumer> 49 clang::CreateHTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &PP, 50 bool SyntaxHighlight, bool HighlightMacros) { 51 return std::make_unique<HTMLPrinter>(std::move(OS), PP, SyntaxHighlight, 52 HighlightMacros); 53 } 54 55 void HTMLPrinter::Initialize(ASTContext &context) { 56 R.setSourceMgr(context.getSourceManager(), context.getLangOpts()); 57 } 58 59 void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) { 60 if (PP.getDiagnostics().hasErrorOccurred()) 61 return; 62 63 // Format the file. 64 FileID FID = R.getSourceMgr().getMainFileID(); 65 const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID); 66 StringRef Name; 67 // In some cases, in particular the case where the input is from stdin, 68 // there is no entry. Fall back to the memory buffer for a name in those 69 // cases. 70 if (Entry) 71 Name = Entry->getName(); 72 else 73 Name = R.getSourceMgr().getBufferOrFake(FID).getBufferIdentifier(); 74 75 html::AddLineNumbers(R, FID); 76 html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name); 77 78 // If we have a preprocessor, relex the file and syntax highlight. 79 // We might not have a preprocessor if we come from a deserialized AST file, 80 // for example. 81 82 if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP); 83 if (HighlightMacros) html::HighlightMacros(R, FID, PP); 84 html::EscapeText(R, FID, false, true); 85 86 // Emit the HTML. 87 const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID); 88 std::unique_ptr<char[]> Buffer(new char[RewriteBuf.size()]); 89 std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer.get()); 90 Out->write(Buffer.get(), RewriteBuf.size()); 91 } 92