C++ AutoTArray::AppendElements方法代码示例

void
NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
                        uint8_t* aBreakBefore)
{
  NS_ASSERTION(aText, "aText shouldn't be null"); 

  int outItems = 0;
  HRESULT result;
  AutoTArray<SCRIPT_ITEM, 64> items;
  char16ptr_t text = aText;

  memset(aBreakBefore, false, aLength);

  if (!items.AppendElements(64))
    return;

  do {
    result = ScriptItemize(text, aLength, items.Length(), nullptr, nullptr,
                           items.Elements(), &outItems);

    if (result == E_OUTOFMEMORY) {
      if (!items.AppendElements(items.Length()))
        return;
    }
  } while (result == E_OUTOFMEMORY);

  for (int iItem = 0; iItem < outItems; ++iItem)  {
    uint32_t endOffset = (iItem + 1 == outItems ? aLength : items[iItem + 1].iCharPos);
    uint32_t startOffset = items[iItem].iCharPos;
    AutoTArray<SCRIPT_LOGATTR, 64> sla;
    
    if (!sla.AppendElements(endOffset - startOffset))
      return;

    if (ScriptBreak(text + startOffset, endOffset - startOffset,
                    &items[iItem].a,  sla.Elements()) < 0) 
      return;

    for (uint32_t j=0; j+startOffset < endOffset; ++j) {
       aBreakBefore[j+startOffset] = sla[j].fSoftBreak;
    }
  }
}

void
GMPDecryptorChild::KeyStatusChanged(const char* aSessionId,
                                    uint32_t aSessionIdLength,
                                    const uint8_t* aKeyId,
                                    uint32_t aKeyIdLength,
                                    GMPMediaKeyStatus aStatus)
{
  AutoTArray<uint8_t, 16> kid;
  kid.AppendElements(aKeyId, aKeyIdLength);
  CALL_ON_GMP_THREAD(SendKeyStatusChanged,
                     nsCString(aSessionId, aSessionIdLength), kid,
                     aStatus);
}

void
NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
                        uint8_t* aBreakBefore)
{
  NS_ASSERTION(aText, "aText shouldn't be null");

  memset(aBreakBefore, false, aLength * sizeof(uint8_t));

  AutoTArray<PangoLogAttr, 2000> attrBuffer;
  if (!attrBuffer.AppendElements(aLength + 1))
    return;

  NS_ConvertUTF16toUTF8 aUTF8(aText, aLength);

  const gchar* p = aUTF8.Data();
  const gchar* end = p + aUTF8.Length();
  uint32_t     u16Offset = 0;

  static PangoLanguage* language = pango_language_from_string("en");

  while (p < end)
  {
    PangoLogAttr* attr = attrBuffer.Elements();
    pango_get_log_attrs(p, end - p, -1, language, attr, attrBuffer.Length());

    while (p < end)
    {
      aBreakBefore[u16Offset] = attr->is_line_break;
      if (NS_IS_LOW_SURROGATE(aText[u16Offset]))
        aBreakBefore[++u16Offset] = false; // Skip high surrogate
      ++u16Offset;

      bool err;
      uint32_t ch = UTF8CharEnumerator::NextChar(&p, end, &err);
      ++attr;

      if (ch == 0 || err) {
        // pango_break (pango 1.16.2) only analyses text before the
        // first NUL (but sets one extra attr). Workaround loop to call
        // pango_break again to analyse after the NUL is done somewhere else
        // (gfx/thebes/gfxFontconfigFonts.cpp: SetupClusterBoundaries()).
        // So, we do the same here for pango_get_log_attrs.
        break;
      }
    }
  }
}

//.........这里部分代码省略.........
            MakeUnique<RestyleTimelineMarker>(
              data->mRestyleHint, MarkerTracingType::START)));
        }

#if defined(MOZ_ENABLE_PROFILER_SPS)
        Maybe<GeckoProfilerTracingRAII> profilerRAII;
        if (profiler_feature_active("restyle")) {
          profilerRAII.emplace("Paint", "Styles", Move(data->mBacktrace));
        }
#endif
        ProcessOneRestyle(element, data->mRestyleHint, data->mChangeHint,
                          data->mRestyleHintData);
        AddRestyleRootsIfAwaitingRestyle(data->mDescendants);

        if (isTimelineRecording) {
          timelines->AddMarkerForDocShell(docShell, Move(
            MakeUnique<RestyleTimelineMarker>(
              data->mRestyleHint, MarkerTracingType::END)));
        }
      }

      if (mHaveLaterSiblingRestyles) {
        // Keep processing restyles for now
        continue;
      }

      // Now we only have entries with change hints left.  To be safe in
      // case of reentry from the handing of the change hint, use a
      // scratch array instead of calling out to ProcessOneRestyle while
      // enumerating the hashtable.  Use the stack if we can, otherwise
      // fall back on heap-allocation.
      AutoTArray<RestyleEnumerateData, RESTYLE_ARRAY_STACKSIZE> restyleArr;
      RestyleEnumerateData* restylesToProcess =
        restyleArr.AppendElements(mPendingRestyles.Count());
      if (restylesToProcess) {
        RestyleEnumerateData* restyle = restylesToProcess;
#ifdef RESTYLE_LOGGING
        uint32_t count = 0;
#endif
        for (auto iter = mPendingRestyles.Iter(); !iter.Done(); iter.Next()) {
          auto element = static_cast<dom::Element*>(iter.Key());
          RestyleTracker::RestyleData* data = iter.Data();

          // Only collect the entries that actually need restyling by us (and
          // haven't, for example, already been restyled).
          // It's important to not mess with the flags on entries not in our
          // document.
          if (element->GetComposedDoc() != Document() ||
              !element->HasFlag(RestyleBit())) {
            LOG_RESTYLE("skipping pending restyle %s, already restyled or no "
                        "longer in the document",
                        FrameTagToString(element).get());
            continue;
          }

          NS_ASSERTION(
            !element->HasFlag(RootBit()) ||
            // Maybe we're just not reachable via the frame tree?
            (element->GetFlattenedTreeParent() &&
             (!element->GetFlattenedTreeParent()->GetPrimaryFrame() ||
              element->GetFlattenedTreeParent()->GetPrimaryFrame()->IsLeaf() ||
              element->GetComposedDoc()->GetShell()->FrameManager()
                ->GetDisplayContentsStyleFor(element))) ||
            // Or not reachable due to an async reinsert we have
            // pending?  If so, we'll have a reframe hint around.
            // That incidentally makes it safe that we still have

nsresult
nsLineBreaker::FlushCurrentWord()
{
  uint32_t length = mCurrentWord.Length();
  AutoTArray<uint8_t,4000> breakState;
  if (!breakState.AppendElements(length))
    return NS_ERROR_OUT_OF_MEMORY;
  
  nsTArray<bool> capitalizationState;

  if (!mCurrentWordContainsComplexChar) {
    // For break-strict set everything internal to "break", otherwise
    // to "no break"!
    memset(breakState.Elements(),
           mWordBreak == nsILineBreaker::kWordBreak_BreakAll ?
             gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NORMAL :
             gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE,
           length*sizeof(uint8_t));
  } else {
    nsContentUtils::LineBreaker()->
      GetJISx4051Breaks(mCurrentWord.Elements(), length, mWordBreak,
                        breakState.Elements());
  }

  bool autoHyphenate = mCurrentWordLanguage &&
    !mCurrentWordContainsMixedLang;
  uint32_t i;
  for (i = 0; autoHyphenate && i < mTextItems.Length(); ++i) {
    TextItem* ti = &mTextItems[i];
    if (!(ti->mFlags & BREAK_USE_AUTO_HYPHENATION)) {
      autoHyphenate = false;
    }
  }
  if (autoHyphenate) {
    RefPtr<nsHyphenator> hyphenator =
      nsHyphenationManager::Instance()->GetHyphenator(mCurrentWordLanguage);
    if (hyphenator) {
      FindHyphenationPoints(hyphenator,
                            mCurrentWord.Elements(),
                            mCurrentWord.Elements() + length,
                            breakState.Elements());
    }
  }

  uint32_t offset = 0;
  for (i = 0; i < mTextItems.Length(); ++i) {
    TextItem* ti = &mTextItems[i];
    NS_ASSERTION(ti->mLength > 0, "Zero length word contribution?");

    if ((ti->mFlags & BREAK_SUPPRESS_INITIAL) && ti->mSinkOffset == 0) {
      breakState[offset] = gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE;
    }
    if (ti->mFlags & BREAK_SUPPRESS_INSIDE) {
      uint32_t exclude = ti->mSinkOffset == 0 ? 1 : 0;
      memset(breakState.Elements() + offset + exclude,
             gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE,
             (ti->mLength - exclude)*sizeof(uint8_t));
    }

    // Don't set the break state for the first character of the word, because
    // it was already set correctly earlier and we don't know what the true
    // value should be.
    uint32_t skipSet = i == 0 ? 1 : 0;
    if (ti->mSink) {
      ti->mSink->SetBreaks(ti->mSinkOffset + skipSet, ti->mLength - skipSet,
                           breakState.Elements() + offset + skipSet);

      if (ti->mFlags & BREAK_NEED_CAPITALIZATION) {
        if (capitalizationState.Length() == 0) {
          if (!capitalizationState.AppendElements(length))
            return NS_ERROR_OUT_OF_MEMORY;
          memset(capitalizationState.Elements(), false, length*sizeof(bool));
          SetupCapitalization(mCurrentWord.Elements(), length,
                              capitalizationState.Elements());
        }
        ti->mSink->SetCapitalization(ti->mSinkOffset, ti->mLength,
                                     capitalizationState.Elements() + offset);
      }
    }
    
    offset += ti->mLength;
  }

  mCurrentWord.Clear();
  mTextItems.Clear();
  mCurrentWordContainsComplexChar = false;
  mCurrentWordContainsMixedLang = false;
  mCurrentWordLanguage = nullptr;
  return NS_OK;
}

nsresult
nsLineBreaker::AppendText(nsIAtom* aHyphenationLanguage, const uint8_t* aText, uint32_t aLength,
                          uint32_t aFlags, nsILineBreakSink* aSink)
{
  NS_ASSERTION(aLength > 0, "Appending empty text...");

  if (aFlags & (BREAK_NEED_CAPITALIZATION | BREAK_USE_AUTO_HYPHENATION)) {
    // Defer to the Unicode path if capitalization or hyphenation is required
    nsAutoString str;
    const char* cp = reinterpret_cast<const char*>(aText);
    CopyASCIItoUTF16(nsDependentCSubstring(cp, cp + aLength), str);
    return AppendText(aHyphenationLanguage, str.get(), aLength, aFlags, aSink);
  }

  uint32_t offset = 0;

  // Continue the current word
  if (mCurrentWord.Length() > 0) {
    NS_ASSERTION(!mAfterBreakableSpace && !mBreakHere, "These should not be set");

    while (offset < aLength && !IsSpace(aText[offset])) {
      mCurrentWord.AppendElement(aText[offset]);
      if (!mCurrentWordContainsComplexChar &&
          IsComplexASCIIChar(aText[offset])) {
        mCurrentWordContainsComplexChar = true;
      }
      ++offset;
    }

    if (offset > 0) {
      mTextItems.AppendElement(TextItem(aSink, 0, offset, aFlags));
    }

    if (offset == aLength) {
      // We did not encounter whitespace so the word hasn't finished yet.
      return NS_OK;
    }

    // We encountered whitespace, so we're done with this word
    nsresult rv = FlushCurrentWord();
    if (NS_FAILED(rv))
      return rv;
  }

  AutoTArray<uint8_t,4000> breakState;
  if (aSink) {
    if (!breakState.AppendElements(aLength))
      return NS_ERROR_OUT_OF_MEMORY;
  }

  uint32_t start = offset;
  bool noBreaksNeeded = !aSink ||
    ((aFlags & NO_BREAKS_NEEDED_FLAGS) == NO_BREAKS_NEEDED_FLAGS &&
     !mBreakHere && !mAfterBreakableSpace);
  if (noBreaksNeeded) {
    // Skip to the space before the last word, since either the break data
    // here is not needed, or no breaks are set in the sink and there cannot
    // be any breaks in this chunk; all we need is the context for the next
    // chunk (if any)
    offset = aLength;
    while (offset > start) {
      --offset;
      if (IsSpace(aText[offset]))
        break;
    }
  }
  uint32_t wordStart = offset;
  bool wordHasComplexChar = false;

  for (;;) {
    uint8_t ch = aText[offset];
    bool isSpace = IsSpace(ch);
    bool isBreakableSpace = isSpace && !(aFlags & BREAK_SUPPRESS_INSIDE);

    if (aSink) {
      // Consider word-break style.  Since the break position of CJK scripts
      // will be set by nsILineBreaker, we don't consider CJK at this point.
      breakState[offset] =
        mBreakHere || (mAfterBreakableSpace && !isBreakableSpace) ||
        (mWordBreak == nsILineBreaker::kWordBreak_BreakAll) ?
          gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NORMAL :
          gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE;
    }
    mBreakHere = false;
    mAfterBreakableSpace = isBreakableSpace;

    if (isSpace) {
      if (offset > wordStart && wordHasComplexChar) {
        if (aSink && !(aFlags & BREAK_SUPPRESS_INSIDE)) {
          // Save current start-of-word state because GetJISx4051Breaks will
          // set it to false
          uint8_t currentStart = breakState[wordStart];
          nsContentUtils::LineBreaker()->
            GetJISx4051Breaks(aText + wordStart, offset - wordStart,
                              mWordBreak,
                              breakState.Elements() + wordStart);
          breakState[wordStart] = currentStart;
        }
        wordHasComplexChar = false;
      }
//.........这里部分代码省略.........

nsresult
nsLineBreaker::AppendText(nsIAtom* aHyphenationLanguage, const char16_t* aText, uint32_t aLength,
                          uint32_t aFlags, nsILineBreakSink* aSink)
{
  NS_ASSERTION(aLength > 0, "Appending empty text...");

  uint32_t offset = 0;

  // Continue the current word
  if (mCurrentWord.Length() > 0) {
    NS_ASSERTION(!mAfterBreakableSpace && !mBreakHere, "These should not be set");

    while (offset < aLength && !IsSpace(aText[offset])) {
      mCurrentWord.AppendElement(aText[offset]);
      if (!mCurrentWordContainsComplexChar && IsComplexChar(aText[offset])) {
        mCurrentWordContainsComplexChar = true;
      }
      UpdateCurrentWordLanguage(aHyphenationLanguage);
      ++offset;
    }

    if (offset > 0) {
      mTextItems.AppendElement(TextItem(aSink, 0, offset, aFlags));
    }

    if (offset == aLength)
      return NS_OK;

    // We encountered whitespace, so we're done with this word
    nsresult rv = FlushCurrentWord();
    if (NS_FAILED(rv))
      return rv;
  }

  AutoTArray<uint8_t,4000> breakState;
  if (aSink) {
    if (!breakState.AppendElements(aLength))
      return NS_ERROR_OUT_OF_MEMORY;
  }

  bool noCapitalizationNeeded = true;
  nsTArray<bool> capitalizationState;
  if (aSink && (aFlags & BREAK_NEED_CAPITALIZATION)) {
    if (!capitalizationState.AppendElements(aLength))
      return NS_ERROR_OUT_OF_MEMORY;
    memset(capitalizationState.Elements(), false, aLength*sizeof(bool));
    noCapitalizationNeeded = false;
  }

  uint32_t start = offset;
  bool noBreaksNeeded = !aSink ||
    ((aFlags & NO_BREAKS_NEEDED_FLAGS) == NO_BREAKS_NEEDED_FLAGS &&
     !mBreakHere && !mAfterBreakableSpace);
  if (noBreaksNeeded && noCapitalizationNeeded) {
    // Skip to the space before the last word, since either the break data
    // here is not needed, or no breaks are set in the sink and there cannot
    // be any breaks in this chunk; and we don't need to do word-initial
    // capitalization. All we need is the context for the next chunk (if any).
    offset = aLength;
    while (offset > start) {
      --offset;
      if (IsSpace(aText[offset]))
        break;
    }
  }
  uint32_t wordStart = offset;
  bool wordHasComplexChar = false;

  RefPtr<nsHyphenator> hyphenator;
  if ((aFlags & BREAK_USE_AUTO_HYPHENATION) &&
      !(aFlags & BREAK_SUPPRESS_INSIDE) &&
      aHyphenationLanguage) {
    hyphenator = nsHyphenationManager::Instance()->GetHyphenator(aHyphenationLanguage);
  }

  for (;;) {
    char16_t ch = aText[offset];
    bool isSpace = IsSpace(ch);
    bool isBreakableSpace = isSpace && !(aFlags & BREAK_SUPPRESS_INSIDE);

    if (aSink && !noBreaksNeeded) {
      breakState[offset] =
        mBreakHere || (mAfterBreakableSpace && !isBreakableSpace) ||
        (mWordBreak == nsILineBreaker::kWordBreak_BreakAll)  ?
          gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NORMAL :
          gfxTextRun::CompressedGlyph::FLAG_BREAK_TYPE_NONE;
    }
    mBreakHere = false;
    mAfterBreakableSpace = isBreakableSpace;

    if (isSpace) {
      if (offset > wordStart && aSink) {
        if (!(aFlags & BREAK_SUPPRESS_INSIDE)) {
          if (wordHasComplexChar) {
            // Save current start-of-word state because GetJISx4051Breaks will
            // set it to false
            uint8_t currentStart = breakState[wordStart];
            nsContentUtils::LineBreaker()->
              GetJISx4051Breaks(aText + wordStart, offset - wordStart,
                                mWordBreak,
//.........这里部分代码省略.........