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:
HTMLPrinter(raw_ostream * OS,Preprocessor & pp,bool _SyntaxHighlight,bool _HighlightMacros)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) override;
46 void HandleTranslationUnit(ASTContext &Ctx) override;
47 };
48 }
49
CreateHTMLPrinter(raw_ostream * OS,Preprocessor & PP,bool SyntaxHighlight,bool HighlightMacros)50 std::unique_ptr<ASTConsumer> clang::CreateHTMLPrinter(raw_ostream *OS,
51 Preprocessor &PP,
52 bool SyntaxHighlight,
53 bool HighlightMacros) {
54 return llvm::make_unique<HTMLPrinter>(OS, PP, SyntaxHighlight,
55 HighlightMacros);
56 }
57
Initialize(ASTContext & context)58 void HTMLPrinter::Initialize(ASTContext &context) {
59 R.setSourceMgr(context.getSourceManager(), context.getLangOpts());
60 }
61
HandleTranslationUnit(ASTContext & Ctx)62 void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) {
63 if (PP.getDiagnostics().hasErrorOccurred())
64 return;
65
66 // Format the file.
67 FileID FID = R.getSourceMgr().getMainFileID();
68 const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID);
69 const char* Name;
70 // In some cases, in particular the case where the input is from stdin,
71 // there is no entry. Fall back to the memory buffer for a name in those
72 // cases.
73 if (Entry)
74 Name = Entry->getName();
75 else
76 Name = R.getSourceMgr().getBuffer(FID)->getBufferIdentifier();
77
78 html::AddLineNumbers(R, FID);
79 html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name);
80
81 // If we have a preprocessor, relex the file and syntax highlight.
82 // We might not have a preprocessor if we come from a deserialized AST file,
83 // for example.
84
85 if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP);
86 if (HighlightMacros) html::HighlightMacros(R, FID, PP);
87 html::EscapeText(R, FID, false, true);
88
89 // Emit the HTML.
90 const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID);
91 char *Buffer = (char*)malloc(RewriteBuf.size());
92 std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer);
93 Out->write(Buffer, RewriteBuf.size());
94 free(Buffer);
95 }
96