C++ nsTArray::IndexOf方法代码示例

void
WidgetKeyboardEvent::GetAccessKeyCandidates(nsTArray<uint32_t>& aCandidates)
{
  MOZ_ASSERT(aCandidates.IsEmpty(), "aCandidates must be empty");

  // return the lower cased charCode candidates for access keys.
  // the priority of the charCodes are:
  //   0: charCode, 1: unshiftedCharCodes[0], 2: shiftedCharCodes[0]
  //   3: unshiftedCharCodes[1], 4: shiftedCharCodes[1],...
  if (charCode) {
    uint32_t ch = charCode;
    if (IS_IN_BMP(ch)) {
      ch = ToLowerCase(static_cast<char16_t>(ch));
    }
    aCandidates.AppendElement(ch);
  }
  for (uint32_t i = 0; i < alternativeCharCodes.Length(); ++i) {
    uint32_t ch[2] =
      { alternativeCharCodes[i].mUnshiftedCharCode,
        alternativeCharCodes[i].mShiftedCharCode };
    for (uint32_t j = 0; j < 2; ++j) {
      if (!ch[j]) {
        continue;
      }
      if (IS_IN_BMP(ch[j])) {
        ch[j] = ToLowerCase(static_cast<char16_t>(ch[j]));
      }
      // Don't append the charCode that was already appended.
      if (aCandidates.IndexOf(ch[j]) == aCandidates.NoIndex) {
        aCandidates.AppendElement(ch[j]);
      }
    }
  }
  // Special case for "Space" key.  With some keyboard layouts, "Space" with
  // or without Shift key causes non-ASCII space.  For such keyboard layouts,
  // we should guarantee that the key press works as an ASCII white space key
  // press.  However, if the space key is assigned to a function key, it
  // shouldn't work as a space key.
  if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
      mCodeNameIndex == CODE_NAME_INDEX_Space &&
      charCode != static_cast<uint32_t>(' ')) {
    aCandidates.AppendElement(static_cast<uint32_t>(' '));
  }
  return;
}

void
nsFontCache::Compact()
{
    // Need to loop backward because the running element can be removed on
    // the way
    for (int32_t i = mFontMetrics.Length()-1; i >= 0; --i) {
        nsFontMetrics* fm = mFontMetrics[i];
        nsFontMetrics* oldfm = fm;
        // Destroy() isn't here because we want our device context to be
        // notified
        NS_RELEASE(fm); // this will reset fm to nullptr
        // if the font is really gone, it would have called back in
        // FontMetricsDeleted() and would have removed itself
        if (mFontMetrics.IndexOf(oldfm) != mFontMetrics.NoIndex) {
            // nope, the font is still there, so let's hold onto it too
            NS_ADDREF(oldfm);
        }
    }
}

void
DBusWatcher::HandleWatchRemove()
{
  int fd;
  ssize_t res = TEMP_FAILURE_RETRY(read(mControlFdR.get(), &fd, sizeof(fd)));
  if (res < 0) {
    LOG("Cannot read DBus watch remove descriptor data from socket!\n");
    return;
  }

  unsigned int flags;
  res = TEMP_FAILURE_RETRY(read(mControlFdR.get(), &flags, sizeof(flags)));
  if (res < 0) {
    LOG("Cannot read DBus watch remove flag data from socket!\n");
    return;
  }

  struct pollfd p = {
    fd, // .fd
    DBusFlagsToUnixEvents(flags), // .events
    0 // .revents
  };
  int index = mPollData.IndexOf(p, 0, PollFdComparator());
  // There are times where removes can be requested for watches that
  // haven't been added (for example, whenever gecko comes up after
  // adapters have already been enabled), so check to make sure we're
  // using the watch in the first place
  if (index < 0) {
    LOG("DBus requested watch removal of non-existant socket, ignoring...");
    return;
  }
  mPollData.RemoveElementAt(index);

  // DBusWatch pointers are maintained by DBus, so we won't leak by
  // removing.
  mWatchData.RemoveElementAt(index);
}