C++ nsAString::Last方法代码示例

NS_IMETHODIMP nsFileResult::GetValueAt(int32_t index, nsAString & aValue)
{
  aValue = mValues[index];
  if (aValue.Last() == '/')
    aValue.Truncate(aValue.Length() - 1);
  return NS_OK;
}

static bool
IsMatchingParameter(const nsAString &aString, const nsAString &aParameterName)
{
  // The first two tests ensure aString.Length() > aParameterName.Length()
  // so it's then safe to do the third test
  return StringBeginsWith(aString, aParameterName) &&
         aString.Last() == ')' &&
         aString.CharAt(aParameterName.Length()) == '(';
}

NS_IMETHODIMP
nsAOLCiter::GetCiteString(const nsAString& aInString, nsAString& aOutString)
{
  aOutString.AssignLiteral("\n\n>> ");
  aOutString += aInString;

  // See if the last char is a newline, and replace it if so
  PRUnichar newline ('\n');
  if (aOutString.Last() == newline)
  {
    aOutString.SetLength(aOutString.Length() - 1);
  }

  aOutString.AppendLiteral(" <<\n");

  return NS_OK;
}

/* static */ bool
FileSystemUtils::IsValidRelativeDOMPath(const nsAString& aPath,
                                        nsTArray<nsString>& aParts)
{
  // We don't allow empty relative path to access the root.
  if (aPath.IsEmpty()) {
    return false;
  }

  // Leading and trailing "/" are not allowed.
  if (aPath.First() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR ||
      aPath.Last() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR) {
    return false;
  }

  NS_NAMED_LITERAL_STRING(kCurrentDir, ".");
  NS_NAMED_LITERAL_STRING(kParentDir, "..");

  // Split path and check each path component.
  nsCharSeparatedTokenizerTemplate<TokenizerIgnoreNothing>
    tokenizer(aPath, FILESYSTEM_DOM_PATH_SEPARATOR_CHAR);

  while (tokenizer.hasMoreTokens()) {
    nsDependentSubstring pathComponent = tokenizer.nextToken();
    // The path containing empty components, such as "foo//bar", is invalid.
    // We don't allow paths, such as "../foo", "foo/./bar" and "foo/../bar",
    // to walk up the directory.
    if (pathComponent.IsEmpty() ||
        pathComponent.Equals(kCurrentDir) ||
        pathComponent.Equals(kParentDir)) {
      return false;
    }

    aParts.AppendElement(pathComponent);
  }

  return true;
}

void
CSSLexer::PerformEOFFixup(const nsAString& aInputString, bool aPreserveBackslash,
                          nsAString& aResult)
{
  aResult.Append(aInputString);
  uint32_t eofChars = mScanner.GetEOFCharacters();

  if (aPreserveBackslash &&
      (eofChars & (nsCSSScanner::eEOFCharacters_DropBackslash |
                   nsCSSScanner::eEOFCharacters_ReplacementChar)) != 0) {
    eofChars &= ~(nsCSSScanner::eEOFCharacters_DropBackslash |
                  nsCSSScanner::eEOFCharacters_ReplacementChar);
    aResult.Append('\\');
  }

  if ((eofChars & nsCSSScanner::eEOFCharacters_DropBackslash) != 0 &&
      aResult.Length() > 0 && aResult.Last() == '\\') {
    aResult.Truncate(aResult.Length() - 1);
  }

  nsCSSScanner::AppendImpliedEOFCharacters(nsCSSScanner::EOFCharacters(eofChars),
                                           aResult);
}

nsresult
InternetCiter::Rewrap(const nsAString& aInString,
                      uint32_t aWrapCol,
                      uint32_t aFirstLineOffset,
                      bool aRespectNewlines,
                      nsAString& aOutString)
{
  // There shouldn't be returns in this string, only dom newlines.
  // Check to make sure:
#ifdef DEBUG
  int32_t cr = aInString.FindChar(char16_t('\r'));
  NS_ASSERTION((cr < 0), "Rewrap: CR in string gotten from DOM!\n");
#endif /* DEBUG */

  aOutString.Truncate();

  nsresult rv;

  RefPtr<mozilla::intl::LineBreaker> lineBreaker =
    mozilla::intl::LineBreaker::Create();
  MOZ_ASSERT(lineBreaker);

  // Loop over lines in the input string, rewrapping each one.
  uint32_t length;
  uint32_t posInString = 0;
  uint32_t outStringCol = 0;
  uint32_t citeLevel = 0;
  const nsPromiseFlatString &tString = PromiseFlatString(aInString);
  length = tString.Length();
  while (posInString < length) {
    // Get the new cite level here since we're at the beginning of a line
    uint32_t newCiteLevel = 0;
    while (posInString < length && tString[posInString] == gt) {
      ++newCiteLevel;
      ++posInString;
      while (posInString < length && tString[posInString] == space) {
        ++posInString;
      }
    }
    if (posInString >= length) {
      break;
    }

    // Special case: if this is a blank line, maintain a blank line
    // (retain the original paragraph breaks)
    if (tString[posInString] == nl && !aOutString.IsEmpty()) {
      if (aOutString.Last() != nl) {
        aOutString.Append(nl);
      }
      AddCite(aOutString, newCiteLevel);
      aOutString.Append(nl);

      ++posInString;
      outStringCol = 0;
      continue;
    }

    // If the cite level has changed, then start a new line with the
    // new cite level (but if we're at the beginning of the string,
    // don't bother).
    if (newCiteLevel != citeLevel && posInString > newCiteLevel+1 &&
        outStringCol) {
      BreakLine(aOutString, outStringCol, 0);
    }
    citeLevel = newCiteLevel;

    // Prepend the quote level to the out string if appropriate
    if (!outStringCol) {
      AddCite(aOutString, citeLevel);
      outStringCol = citeLevel + (citeLevel ? 1 : 0);
    }
    // If it's not a cite, and we're not at the beginning of a line in
    // the output string, add a space to separate new text from the
    // previous text.
    else if (outStringCol > citeLevel) {
      aOutString.Append(space);
      ++outStringCol;
    }

    // find the next newline -- don't want to go farther than that
    int32_t nextNewline = tString.FindChar(nl, posInString);
    if (nextNewline < 0) {
      nextNewline = length;
    }

    // For now, don't wrap unquoted lines at all.
    // This is because the plaintext edit window has already wrapped them
    // by the time we get them for rewrap, yet when we call the line
    // breaker, it will refuse to break backwards, and we'll end up
    // with a line that's too long and gets displayed as a lone word
    // on a line by itself.  Need special logic to detect this case
    // and break it ourselves without resorting to the line breaker.
    if (!citeLevel) {
      aOutString.Append(Substring(tString, posInString,
                                  nextNewline-posInString));
      outStringCol += nextNewline - posInString;
      if (nextNewline != (int32_t)length) {
        aOutString.Append(nl);
        outStringCol = 0;
      }
//.........这里部分代码省略.........

NS_IMETHODIMP
nsInternetCiter::Rewrap(const nsAString& aInString,
                        PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
                        PRBool aRespectNewlines,
                        nsAString& aOutString)
{
  // There shouldn't be returns in this string, only dom newlines.
  // Check to make sure:
#ifdef DEBUG
  PRInt32 cr = aInString.FindChar(PRUnichar('\r'));
  NS_ASSERTION((cr < 0), "Rewrap: CR in string gotten from DOM!\n");
#endif /* DEBUG */

  aOutString.Truncate();

  nsCOMPtr<nsILineBreaker> lineBreaker;
  nsILineBreakerFactory *lf;
  nsresult rv;
  rv = CallGetService(NS_LWBRK_CONTRACTID, &lf);
  if (NS_SUCCEEDED(rv))
  {
    nsAutoString lbarg;
    lf->GetBreaker(lbarg, getter_AddRefs(lineBreaker));
    NS_RELEASE(lf);
  }

  // Loop over lines in the input string, rewrapping each one.
  PRUint32 length;
  PRUint32 posInString = 0;
  PRUint32 outStringCol = 0;
  PRUint32 citeLevel = 0;
  const nsPromiseFlatString &tString = PromiseFlatString(aInString);
  length = tString.Length();
#ifdef DEBUG_wrapping
  int loopcount = 0;
#endif
  while (posInString < length)
  {
#ifdef DEBUG_wrapping
    printf("Outer loop: '%s'\n",
           NS_LossyConvertUCS2toASCII(Substring(tString, posInString,
                                                length-posInString)).get());
    printf("out string is now: '%s'\n",
           NS_LossyConvertUCS2toASCII(aOutString).get());

#endif

    // Get the new cite level here since we're at the beginning of a line
    PRUint32 newCiteLevel = 0;
    while (posInString < length && tString[posInString] == gt)
    {
      ++newCiteLevel;
      ++posInString;
      while (posInString < length && tString[posInString] == space)
        ++posInString;
    }
    if (posInString >= length)
      break;

    // Special case: if this is a blank line, maintain a blank line
    // (retain the original paragraph breaks)
    if (tString[posInString] == nl && !aOutString.IsEmpty())
    {
      if (aOutString.Last() != nl)
        aOutString.Append(nl);
      AddCite(aOutString, newCiteLevel);
      aOutString.Append(nl);

      ++posInString;
      outStringCol = 0;
      continue;
    }

    // If the cite level has changed, then start a new line with the
    // new cite level (but if we're at the beginning of the string,
    // don't bother).
    if (newCiteLevel != citeLevel && posInString > newCiteLevel+1
        && outStringCol != 0)
    {
      BreakLine(aOutString, outStringCol, 0);
    }
    citeLevel = newCiteLevel;

    // Prepend the quote level to the out string if appropriate
    if (outStringCol == 0)
    {
      AddCite(aOutString, citeLevel);
      outStringCol = citeLevel + (citeLevel ? 1 : 0);
    }
    // If it's not a cite, and we're not at the beginning of a line in
    // the output string, add a space to separate new text from the
    // previous text.
    else if (outStringCol > citeLevel)
    {
      aOutString.Append(space);
      ++outStringCol;
    }

    // find the next newline -- don't want to go farther than that
    PRInt32 nextNewline = tString.FindChar(nl, posInString);
//.........这里部分代码省略.........