HTMLPrint.cpp revision 305c613af6cfc40e519c75d9d2c84c6fa9a841c0 
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/Rewrite/Frontend/ASTConsumers.h"
15#include "clang/AST/ASTConsumer.h"
16#include "clang/AST/ASTContext.h"
17#include "clang/AST/Decl.h"
18#include "clang/Basic/Diagnostic.h"
19#include "clang/Basic/FileManager.h"
20#include "clang/Basic/SourceManager.h"
21#include "clang/Lex/Preprocessor.h"
22#include "clang/Rewrite/Core/HTMLRewrite.h"
23#include "clang/Rewrite/Core/Rewriter.h"
24#include "llvm/Support/MemoryBuffer.h"
25#include "llvm/Support/raw_ostream.h"
26using namespace clang;
27
28//===----------------------------------------------------------------------===//
29// Functional HTML pretty-printing.
30//===----------------------------------------------------------------------===//
31
32namespace {
33  class HTMLPrinter : public ASTConsumer {
34    Rewriter R;
35    raw_ostream *Out;
36    Preprocessor &PP;
37    bool SyntaxHighlight, HighlightMacros;
38
39  public:
40    HTMLPrinter(raw_ostream *OS, Preprocessor &pp,
41                bool _SyntaxHighlight, bool _HighlightMacros)
42      : Out(OS), PP(pp), SyntaxHighlight(_SyntaxHighlight),
43        HighlightMacros(_HighlightMacros) {}
44
45    void Initialize(ASTContext &context);
46    void HandleTranslationUnit(ASTContext &Ctx);
47  };
48}
49
50ASTConsumer* clang::CreateHTMLPrinter(raw_ostream *OS,
51                                      Preprocessor &PP,
52                                      bool SyntaxHighlight,
53                                      bool HighlightMacros) {
54  return new HTMLPrinter(OS, PP, SyntaxHighlight, HighlightMacros);
55}
56
57void HTMLPrinter::Initialize(ASTContext &context) {
58  R.setSourceMgr(context.getSourceManager(), context.getLangOpts());
59}
60
61void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) {
62  if (PP.getDiagnostics().hasErrorOccurred())
63    return;
64
65  // Format the file.
66  FileID FID = R.getSourceMgr().getMainFileID();
67  const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID);
68  const char* Name;
69  // In some cases, in particular the case where the input is from stdin,
70  // there is no entry.  Fall back to the memory buffer for a name in those
71  // cases.
72  if (Entry)
73    Name = Entry->getName();
74  else
75    Name = R.getSourceMgr().getBuffer(FID)->getBufferIdentifier();
76
77  html::AddLineNumbers(R, FID);
78  html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name);
79
80  // If we have a preprocessor, relex the file and syntax highlight.
81  // We might not have a preprocessor if we come from a deserialized AST file,
82  // for example.
83
84  if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP);
85  if (HighlightMacros) html::HighlightMacros(R, FID, PP);
86  html::EscapeText(R, FID, false, true);
87
88  // Emit the HTML.
89  const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID);
90  char *Buffer = (char*)malloc(RewriteBuf.size());
91  std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer);
92  Out->write(Buffer, RewriteBuf.size());
93  free(Buffer);
94}
95