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//== HTMLRewrite.cpp - Translate source code into prettified HTML --*- C++ -*-//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the HTMLRewriter clas, which is used to translate the
// text of a source file into prettified HTML.
//
//===----------------------------------------------------------------------===//
#include "clang/Rewrite/Rewriter.h"
#include "clang/Rewrite/HTMLRewrite.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/MemoryBuffer.h"
#include <sstream>
using namespace clang;
void html::EscapeText(Rewriter& R, unsigned FileID, bool EscapeSpaces) {
const llvm::MemoryBuffer *Buf = R.getSourceMgr().getBuffer(FileID);
const char* C = Buf->getBufferStart();
const char* FileEnd = Buf->getBufferEnd();
assert (C <= FileEnd);
for (unsigned FilePos = 0; C != FileEnd ; ++C, ++FilePos) {
SourceLocation Loc = SourceLocation::getFileLoc(FileID, FilePos);
switch (*C) {
default: break;
case ' ':
if (EscapeSpaces) R.ReplaceText(Loc, 1, " ", 5);
break;
case '<': R.ReplaceText(Loc, 1, "<", 4); break;
case '>': R.ReplaceText(Loc, 1, ">", 4); break;
case '&': R.ReplaceText(Loc, 1, "&", 5); break;
}
}
}
static void AddLineNumber(Rewriter& R, unsigned LineNo,
SourceLocation B, SourceLocation E) {
// Surround the line text with a div tag.
if (B == E) // Handle empty lines.
R.InsertCStrBefore(B, "<div class=\"lines\"> </div>");
else {
R.InsertCStrBefore(E, "</div>");
R.InsertCStrBefore(B, "<div class=\"lines\">");
}
// Insert a div tag for the line number.
std::ostringstream os;
os << "<div class=\"nums\">" << LineNo << "</div>";
R.InsertStrBefore(B, os.str());
// Now surround the whole line with another div tag.
R.InsertCStrBefore(B, "<div class=\"codeline\">");
R.InsertCStrAfter(E, "</div>");
}
void html::AddLineNumbers(Rewriter& R, unsigned FileID) {
const llvm::MemoryBuffer *Buf = R.getSourceMgr().getBuffer(FileID);
const char* FileBeg = Buf->getBufferStart();
const char* FileEnd = Buf->getBufferEnd();
const char* C = FileBeg;
assert (C <= FileEnd);
unsigned LineNo = 0;
unsigned FilePos = 0;
while (C != FileEnd) {
++LineNo;
unsigned LineStartPos = FilePos;
unsigned LineEndPos = FileEnd - FileBeg;
assert (FilePos <= LineEndPos);
assert (C < FileEnd);
// Scan until the newline (or end-of-file).
for ( ; C != FileEnd ; ++C, ++FilePos)
if (*C == '\n') {
LineEndPos = FilePos;
break;
}
AddLineNumber(R, LineNo,
SourceLocation::getFileLoc(FileID, LineStartPos),
SourceLocation::getFileLoc(FileID, LineEndPos));
if (C != FileEnd) {
++C;
++FilePos;
}
}
// Add one big div tag that surrounds all of the code.
R.InsertCStrBefore(SourceLocation::getFileLoc(FileID, 0),
"<div id=\"codeblock\">");
R.InsertCStrAfter(SourceLocation::getFileLoc(FileID, FileEnd - FileBeg),
"</div>");
}
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