92 lines
3.3 KiB
C++
92 lines
3.3 KiB
C++
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//===--- HTMLPrint.cpp - Source code -> HTML pretty-printing --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Pretty-printing of source code to HTML.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Rewrite/Core/HTMLRewrite.h"
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#include "clang/Rewrite/Core/Rewriter.h"
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#include "clang/Rewrite/Frontend/ASTConsumers.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Functional HTML pretty-printing.
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//===----------------------------------------------------------------------===//
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namespace {
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class HTMLPrinter : public ASTConsumer {
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Rewriter R;
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std::unique_ptr<raw_ostream> Out;
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Preprocessor &PP;
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bool SyntaxHighlight, HighlightMacros;
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public:
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HTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &pp,
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bool _SyntaxHighlight, bool _HighlightMacros)
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: Out(std::move(OS)), PP(pp), SyntaxHighlight(_SyntaxHighlight),
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HighlightMacros(_HighlightMacros) {}
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void Initialize(ASTContext &context) override;
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void HandleTranslationUnit(ASTContext &Ctx) override;
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};
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}
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std::unique_ptr<ASTConsumer>
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clang::CreateHTMLPrinter(std::unique_ptr<raw_ostream> OS, Preprocessor &PP,
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bool SyntaxHighlight, bool HighlightMacros) {
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return std::make_unique<HTMLPrinter>(std::move(OS), PP, SyntaxHighlight,
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HighlightMacros);
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}
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void HTMLPrinter::Initialize(ASTContext &context) {
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R.setSourceMgr(context.getSourceManager(), context.getLangOpts());
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}
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void HTMLPrinter::HandleTranslationUnit(ASTContext &Ctx) {
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if (PP.getDiagnostics().hasErrorOccurred())
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return;
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// Format the file.
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FileID FID = R.getSourceMgr().getMainFileID();
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const FileEntry* Entry = R.getSourceMgr().getFileEntryForID(FID);
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StringRef Name;
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// In some cases, in particular the case where the input is from stdin,
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// there is no entry. Fall back to the memory buffer for a name in those
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// cases.
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if (Entry)
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Name = Entry->getName();
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else
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Name = R.getSourceMgr().getBufferOrFake(FID).getBufferIdentifier();
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html::AddLineNumbers(R, FID);
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html::AddHeaderFooterInternalBuiltinCSS(R, FID, Name);
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// If we have a preprocessor, relex the file and syntax highlight.
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// We might not have a preprocessor if we come from a deserialized AST file,
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// for example.
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if (SyntaxHighlight) html::SyntaxHighlight(R, FID, PP);
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if (HighlightMacros) html::HighlightMacros(R, FID, PP);
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html::EscapeText(R, FID, false, true);
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// Emit the HTML.
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const RewriteBuffer &RewriteBuf = R.getEditBuffer(FID);
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std::unique_ptr<char[]> Buffer(new char[RewriteBuf.size()]);
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std::copy(RewriteBuf.begin(), RewriteBuf.end(), Buffer.get());
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Out->write(Buffer.get(), RewriteBuf.size());
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}
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