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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __nsWhitespaceTokenizer_h
#define __nsWhitespaceTokenizer_h
#include "mozilla/RangedPtr.h"
#include "nsDependentSubstring.h"
#include "nsCRT.h"
template<typename DependentSubstringType, bool IsWhitespace(char16_t)>
class nsTWhitespaceTokenizer
{
typedef typename DependentSubstringType::char_type CharType;
typedef typename DependentSubstringType::substring_type SubstringType;
public:
explicit nsTWhitespaceTokenizer(const SubstringType& aSource)
: mIter(aSource.Data(), aSource.Length())
, mEnd(aSource.Data() + aSource.Length(), aSource.Data(),
aSource.Length())
, mWhitespaceBeforeFirstToken(false)
, mWhitespaceAfterCurrentToken(false)
{
while (mIter < mEnd && IsWhitespace(*mIter)) {
mWhitespaceBeforeFirstToken = true;
++mIter;
}
}
/**
* Checks if any more tokens are available.
*/
bool hasMoreTokens() const
{
return mIter < mEnd;
}
/*
* Returns true if there is whitespace prior to the first token.
*/
bool whitespaceBeforeFirstToken() const
{
return mWhitespaceBeforeFirstToken;
}
/*
* Returns true if there is any whitespace after the current token.
* This is always true unless we're reading the last token.
*/
bool whitespaceAfterCurrentToken() const
{
return mWhitespaceAfterCurrentToken;
}
/**
* Returns the next token.
*/
const DependentSubstringType nextToken()
{
const mozilla::RangedPtr<const CharType> tokenStart = mIter;
while (mIter < mEnd && !IsWhitespace(*mIter)) {
++mIter;
}
const mozilla::RangedPtr<const CharType> tokenEnd = mIter;
mWhitespaceAfterCurrentToken = false;
while (mIter < mEnd && IsWhitespace(*mIter)) {
mWhitespaceAfterCurrentToken = true;
++mIter;
}
return Substring(tokenStart.get(), tokenEnd.get());
}
private:
mozilla::RangedPtr<const CharType> mIter;
const mozilla::RangedPtr<const CharType> mEnd;
bool mWhitespaceBeforeFirstToken;
bool mWhitespaceAfterCurrentToken;
};
template<bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
class nsWhitespaceTokenizerTemplate
: public nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace>
{
public:
explicit nsWhitespaceTokenizerTemplate(const nsSubstring& aSource)
: nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace>(aSource)
{
}
};
typedef nsWhitespaceTokenizerTemplate<> nsWhitespaceTokenizer;
template<bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
class nsCWhitespaceTokenizerTemplate
: public nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace>
{
public:
explicit nsCWhitespaceTokenizerTemplate(const nsCSubstring& aSource)
: nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace>(aSource)
{
}
};
typedef nsCWhitespaceTokenizerTemplate<> nsCWhitespaceTokenizer;
#endif /* __nsWhitespaceTokenizer_h */
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