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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"
26 using namespace clang;
27
28 //===----------------------------------------------------------------------===//
29 // Functional HTML pretty-printing.
30 //===----------------------------------------------------------------------===//
31
32 namespace {
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
50 ASTConsumer* clang::CreateHTMLPrinter(raw_ostream *OS,
51                                       Preprocessor &PP,
52                                       bool SyntaxHighlight,
53                                       bool HighlightMacros) {
54   return new HTMLPrinter(OS, PP, SyntaxHighlight, HighlightMacros);
55 }
56
57 void HTMLPrinter::Initialize(ASTContext &context) {
58   R.setSourceMgr(context.getSourceManager(), context.getLangOpts());
59 }
60
61 void 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 }