C++ nsTArray::InsertElementAt方法代码示例

void
nsWindow::BringToTop()
{
    if (!sTopWindows.IsEmpty()) {
        if (nsIWidgetListener* listener = sTopWindows[0]->GetWidgetListener())
            listener->WindowDeactivated();
    }

    sTopWindows.RemoveElement(this);
    sTopWindows.InsertElementAt(0, this);

    if (mWidgetListener)
        mWidgetListener->WindowActivated();
    Invalidate(sVirtualBounds);
}

void
nsWindow::BringToTop()
{
    if (!sTopWindows.IsEmpty()) {
        nsGUIEvent event(true, NS_DEACTIVATE, sTopWindows[0]);
        (*mEventCallback)(&event);
    }

    sTopWindows.RemoveElement(this);
    sTopWindows.InsertElementAt(0, this);

    nsGUIEvent event(true, NS_ACTIVATE, this);
    (*mEventCallback)(&event);
    Invalidate(sVirtualBounds);
}

nsresult
ICameraControl::GetListOfCameras(nsTArray<nsString>& aList)
{
  int32_t count = android::Camera::getNumberOfCameras();
  DOM_CAMERA_LOGI("getListOfCameras : getNumberOfCameras() returned %d\n", count);
  if (count <= 0) {
    aList.Clear();
    return NS_OK;
  }

  // Allocate 2 extra slots to reserve space for 'front' and 'back' cameras
  // at the front of the array--we will collapse any empty slots below.
  aList.SetLength(2);
  uint32_t extraIdx = 2;
  bool gotFront = false;
  bool gotBack = false;
  while (count--) {
    nsCString cameraName;
    nsresult result = GetCameraName(count, cameraName);
    if (result != NS_OK) {
      continue;
    }

    // The first camera we find named 'back' gets slot 0; and the first
    // we find named 'front' gets slot 1.  All others appear after these.
    if (cameraName.EqualsLiteral("back")) {
      CopyUTF8toUTF16(cameraName, aList[0]);
      gotBack = true;
    } else if (cameraName.EqualsLiteral("front")) {
      CopyUTF8toUTF16(cameraName, aList[1]);
      gotFront = true;
    } else {
      CopyUTF8toUTF16(cameraName, *aList.InsertElementAt(extraIdx));
      extraIdx++;
    }
  }

  if (!gotFront) {
    aList.RemoveElementAt(1);
  }

  if (!gotBack) {
    aList.RemoveElementAt(0);
  }

  return NS_OK;
}

//.........这里部分代码省略.........
        mSkipBytes = mElement.mSize.mValue;
        mState = SKIP_DATA;
        mNextState = READ_ELEMENT_ID;
        break;
      }
      break;
    case READ_VINT: {
      unsigned char c = *p++;
      uint32_t mask;
      mVInt.mLength = VIntLength(c, &mask);
      mVIntLeft = mVInt.mLength - 1;
      mVInt.mValue = mVIntRaw ? c : c & ~mask;
      mState = READ_VINT_REST;
      break;
    }
    case READ_VINT_REST:
      if (mVIntLeft) {
        mVInt.mValue <<= 8;
        mVInt.mValue |= *p++;
        mVIntLeft -= 1;
      } else {
        mState = mNextState;
      }
      break;
    case READ_TIMECODESCALE:
      MOZ_ASSERT(mGotTimecodeScale);
      mTimecodeScale = mVInt.mValue;
      mState = READ_ELEMENT_ID;
      break;
    case READ_CLUSTER_TIMECODE:
      mClusterTimecode = mVInt.mValue;
      mState = READ_ELEMENT_ID;
      break;
    case READ_BLOCK_TIMECODE:
      if (mBlockTimecodeLength) {
        mBlockTimecode <<= 8;
        mBlockTimecode |= *p++;
        mBlockTimecodeLength -= 1;
      } else {
        // It's possible we've parsed this data before, so avoid inserting
        // duplicate WebMTimeDataOffset entries.
        {
          ReentrantMonitorAutoEnter mon(aReentrantMonitor);
          int64_t endOffset = mBlockOffset + mBlockSize +
                              mElement.mID.mLength + mElement.mSize.mLength;
          uint32_t idx = aMapping.IndexOfFirstElementGt(endOffset);
          if (idx == 0 || aMapping[idx - 1] != endOffset) {
            // Don't insert invalid negative timecodes.
            if (mBlockTimecode >= 0 || mClusterTimecode >= uint16_t(abs(mBlockTimecode))) {
              MOZ_ASSERT(mGotTimecodeScale);
              uint64_t absTimecode = mClusterTimecode + mBlockTimecode;
              absTimecode *= mTimecodeScale;
              WebMTimeDataOffset entry(endOffset, absTimecode, mLastInitStartOffset,
                                       mClusterOffset, mClusterEndOffset);
              aMapping.InsertElementAt(idx, entry);
            }
          }
        }

        // Skip rest of block header and the block's payload.
        mBlockSize -= mVInt.mLength;
        mBlockSize -= BLOCK_TIMECODE_LENGTH;
        mSkipBytes = uint32_t(mBlockSize);
        mState = SKIP_DATA;
        mNextState = READ_ELEMENT_ID;
      }
      break;
    case SKIP_DATA:
      if (mSkipBytes) {
        uint32_t left = aLength - (p - aBuffer);
        left = std::min(left, mSkipBytes);
        p += left;
        mSkipBytes -= left;
      }
      if (!mSkipBytes) {
        mBlockEndOffset = mCurrentOffset + (p - aBuffer);
        mState = mNextState;
      }
      break;
    case CHECK_INIT_FOUND:
      if (mSkipBytes) {
        uint32_t left = aLength - (p - aBuffer);
        left = std::min(left, mSkipBytes);
        p += left;
        mSkipBytes -= left;
      }
      if (!mSkipBytes) {
        if (mInitEndOffset < 0) {
          mInitEndOffset = mCurrentOffset + (p - aBuffer);
          mBlockEndOffset = mCurrentOffset + (p - aBuffer);
        }
        mState = READ_ELEMENT_ID;
      }
      break;
    }
  }

  NS_ASSERTION(p == aBuffer + aLength, "Must have parsed to end of data.");
  mCurrentOffset += aLength;
}

nsresult txStylesheet::addStripSpace(
    txStripSpaceItem* aStripSpaceItem,
    nsTArray<txStripSpaceTest*>& aFrameStripSpaceTests) {
  int32_t testCount = aStripSpaceItem->mStripSpaceTests.Length();
  for (; testCount > 0; --testCount) {
    txStripSpaceTest* sst = aStripSpaceItem->mStripSpaceTests[testCount - 1];
    double priority = sst->getDefaultPriority();
    int32_t i, frameCount = aFrameStripSpaceTests.Length();
    for (i = 0; i < frameCount; ++i) {
      if (aFrameStripSpaceTests[i]->getDefaultPriority() < priority) {
        break;
      }
    }
    if (!aFrameStripSpaceTests.InsertElementAt(i, sst)) {
      return NS_ERROR_OUT_OF_MEMORY;
    }

    aStripSpaceItem->mStripSpaceTests.RemoveElementAt(testCount - 1);
  }

  return NS_OK;
}

//.........这里部分代码省略.........
        mVInt <<= 8;
        mVInt |= *p++;
        mVIntLeft -= 1;
      } else {
        mState = mNextState;
      }
      break;
    case TIMECODE_SYNC:
      if (*p++ != TIMECODE_ID) {
        p -= 1;
        mState = CLUSTER_SYNC;
        break;
      }
      mClusterTimecode = 0;
      mState = READ_VINT;
      mNextState = READ_CLUSTER_TIMECODE;
      break;
    case READ_CLUSTER_TIMECODE:
      if (mVInt) {
        mClusterTimecode <<= 8;
        mClusterTimecode |= *p++;
        mVInt -= 1;
      } else {
        mState = ANY_BLOCK_SYNC;
      }
      break;
    case ANY_BLOCK_SYNC: {
      unsigned char c = *p++;
      if (c == BLOCKGROUP_ID) {
        mState = READ_VINT;
        mNextState = ANY_BLOCK_SYNC;
      } else if (c == SIMPLEBLOCK_ID || c == BLOCK_ID) {
        mBlockOffset = mCurrentOffset + (p - aBuffer) - 1;
        mState = READ_VINT;
        mNextState = READ_BLOCK;
      } else {
        uint32_t length = VIntLength(c, nullptr);
        if (length == 4) {
          p -= 1;
          mState = CLUSTER_SYNC;
        } else {
          mState = READ_VINT;
          mNextState = SKIP_ELEMENT;
        }
      }
      break;
    }
    case READ_BLOCK:
      mBlockSize = mVInt;
      mBlockTimecode = 0;
      mBlockTimecodeLength = 2;
      mState = READ_VINT;
      mNextState = READ_BLOCK_TIMECODE;
      break;
    case READ_BLOCK_TIMECODE:
      if (mBlockTimecodeLength) {
        mBlockTimecode <<= 8;
        mBlockTimecode |= *p++;
        mBlockTimecodeLength -= 1;
      } else {
        // It's possible we've parsed this data before, so avoid inserting
        // duplicate nsWebMTimeDataOffset entries.
        {
          ReentrantMonitorAutoEnter mon(aReentrantMonitor);
          uint32_t idx;
          if (!aMapping.GreatestIndexLtEq(mBlockOffset, idx)) {
            nsWebMTimeDataOffset entry(mBlockOffset, mClusterTimecode + mBlockTimecode);
            aMapping.InsertElementAt(idx, entry);
          }
        }

        // Skip rest of block header and the block's payload.
        mBlockSize -= mVIntLength;
        mBlockSize -= 2;
        mSkipBytes = uint32_t(mBlockSize);
        mState = SKIP_DATA;
        mNextState = ANY_BLOCK_SYNC;
      }
      break;
    case SKIP_DATA:
      if (mSkipBytes) {
        uint32_t left = aLength - (p - aBuffer);
        left = NS_MIN(left, mSkipBytes);
        p += left;
        mSkipBytes -= left;
      } else {
        mState = mNextState;
      }
      break;
    case SKIP_ELEMENT:
      mSkipBytes = uint32_t(mVInt);
      mState = SKIP_DATA;
      mNextState = ANY_BLOCK_SYNC;
      break;
    }
  }

  NS_ASSERTION(p == aBuffer + aLength, "Must have parsed to end of data.");
  mCurrentOffset += aLength;
}