93 lines · cpp
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-exception6//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/SourceManager.h"18#include "clang/Lex/Preprocessor.h"19#include "clang/Rewrite/Core/HTMLRewrite.h"20#include "clang/Rewrite/Core/Rewriter.h"21#include "clang/Rewrite/Frontend/ASTConsumers.h"22#include "llvm/ADT/RewriteBuffer.h"23#include "llvm/Support/raw_ostream.h"24using namespace clang;25using llvm::RewriteBuffer;26 27//===----------------------------------------------------------------------===//28// Functional HTML pretty-printing.29//===----------------------------------------------------------------------===//30 31namespace {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 49std::unique_ptr<ASTConsumer>50clang::CreateHTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &PP,51 bool SyntaxHighlight, bool HighlightMacros) {52 return std::make_unique<HTMLPrinter>(std::move(OS), PP, SyntaxHighlight,53 HighlightMacros);54}55 56void HTMLPrinter::Initialize(ASTContext &context) {57 R.setSourceMgr(context.getSourceManager(), context.getLangOpts());58}59 60void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) {61 if (PP.getDiagnostics().hasErrorOccurred())62 return;63 64 // Format the file.65 FileID FID = R.getSourceMgr().getMainFileID();66 OptionalFileEntryRef Entry = R.getSourceMgr().getFileEntryRefForID(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 those70 // cases.71 if (Entry)72 Name = Entry->getName();73 else74 Name = R.getSourceMgr().getBufferOrFake(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 std::unique_ptr<char[]> Buffer(new char[RewriteBuf.size()]);90 std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer.get());91 Out->write(Buffer.get(), RewriteBuf.size());92}93