C++ WritingMode::IsOrthogonalTo方法代码示例

nscoord
nsTableWrapperFrame::ChildShrinkWrapISize(nsRenderingContext* aRenderingContext,
                                          nsIFrame*           aChildFrame,
                                          WritingMode         aWM,
                                          LogicalSize         aCBSize,
                                          nscoord             aAvailableISize,
                                          nscoord*            aMarginResult) const
{
  AutoMaybeDisableFontInflation an(aChildFrame);

  // For the caption frame, child's WM may differ from the table's main WM.
  WritingMode childWM = aChildFrame->GetWritingMode();

  SizeComputationInput offsets(aChildFrame, aRenderingContext, aWM,
                               aCBSize.ISize(aWM));
  LogicalSize marginSize =
    offsets.ComputedLogicalMargin().Size(childWM).ConvertTo(aWM, childWM);
  LogicalSize paddingSize =
    offsets.ComputedLogicalPadding().Size(childWM).ConvertTo(aWM, childWM);
  LogicalSize bpSize =
    offsets.ComputedLogicalBorderPadding().Size(childWM).ConvertTo(aWM, childWM);

  // Shrink-wrap aChildFrame by default, except if we're a stretched grid item.
  auto flags = ComputeSizeFlags::eShrinkWrap;
  auto parent = GetParent();
  nsIAtom* parentFrameType = parent ? parent->GetType() : nullptr;
  bool isGridItem = (parentFrameType == nsGkAtoms::gridContainerFrame &&
                     !HasAnyStateBits(NS_FRAME_OUT_OF_FLOW));
  if (MOZ_UNLIKELY(isGridItem) &&
      !StyleMargin()->HasInlineAxisAuto(aWM)) {
    auto inlineAxisAlignment = aWM.IsOrthogonalTo(parent->GetWritingMode()) ?
                     StylePosition()->UsedAlignSelf(parent->StyleContext()) :
                     StylePosition()->UsedJustifySelf(parent->StyleContext());
    if (inlineAxisAlignment == NS_STYLE_ALIGN_NORMAL ||
        inlineAxisAlignment == NS_STYLE_ALIGN_STRETCH) {
      flags = nsIFrame::ComputeSizeFlags::eDefault;
    }
  }

  LogicalSize size =
    aChildFrame->ComputeSize(aRenderingContext, aWM, aCBSize, aAvailableISize,
                             marginSize, bpSize - paddingSize, paddingSize,
                             flags);
  if (aMarginResult) {
    *aMarginResult = offsets.ComputedLogicalMargin().IStartEnd(aWM);
  }
  return size.ISize(aWM) + marginSize.ISize(aWM) + bpSize.ISize(aWM);
}

void
nsRubyFrame::ReflowSegment(nsPresContext* aPresContext,
                           const ReflowInput& aReflowInput,
                           nsRubyBaseContainerFrame* aBaseContainer,
                           nsReflowStatus& aStatus)
{
  WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
  LogicalSize availSize(lineWM, aReflowInput.AvailableISize(),
                        aReflowInput.AvailableBSize());
  WritingMode rubyWM = GetWritingMode();
  NS_ASSERTION(!rubyWM.IsOrthogonalTo(lineWM),
               "Ruby frame writing-mode shouldn't be orthogonal to its line");

  AutoRubyTextContainerArray textContainers(aBaseContainer);
  const uint32_t rtcCount = textContainers.Length();

  ReflowOutput baseMetrics(aReflowInput);
  bool pushedFrame;
  aReflowInput.mLineLayout->ReflowFrame(aBaseContainer, aStatus,
                                        &baseMetrics, pushedFrame);

  if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) {
    if (aBaseContainer != mFrames.FirstChild()) {
      // Some segments may have been reflowed before, hence it is not
      // a break-before for the ruby container.
      aStatus = NS_INLINE_LINE_BREAK_AFTER(NS_FRAME_NOT_COMPLETE);
      PushChildren(aBaseContainer, aBaseContainer->GetPrevSibling());
      aReflowInput.mLineLayout->SetDirtyNextLine();
    }
    // This base container is not placed at all, we can skip all
    // text containers paired with it.
    return;
  }
  if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
    // It always promise that if the status is incomplete, there is a
    // break occurs. Break before has been processed above. However,
    // it is possible that break after happens with the frame reflow
    // completed. It happens if there is a force break at the end.
    MOZ_ASSERT(NS_INLINE_IS_BREAK_AFTER(aStatus));
    // Find the previous sibling which we will
    // insert new continuations after.
    nsIFrame* lastChild;
    if (rtcCount > 0) {
      lastChild = textContainers.LastElement();
    } else {
      lastChild = aBaseContainer;
    }

    // Create continuations for the base container
    nsIFrame* newBaseContainer = CreateNextInFlow(aBaseContainer);
    // newBaseContainer is null if there are existing next-in-flows.
    // We only need to move and push if there were not.
    if (newBaseContainer) {
      // Move the new frame after all the text containers
      mFrames.RemoveFrame(newBaseContainer);
      mFrames.InsertFrame(nullptr, lastChild, newBaseContainer);

      // Create continuations for text containers
      nsIFrame* newLastChild = newBaseContainer;
      for (uint32_t i = 0; i < rtcCount; i++) {
        nsIFrame* newTextContainer = CreateNextInFlow(textContainers[i]);
        MOZ_ASSERT(newTextContainer, "Next-in-flow of rtc should not exist "
                   "if the corresponding rbc does not");
        mFrames.RemoveFrame(newTextContainer);
        mFrames.InsertFrame(nullptr, newLastChild, newTextContainer);
        newLastChild = newTextContainer;
      }
    }
    if (lastChild != mFrames.LastChild()) {
      // Always push the next frame after the last child in this segment.
      // It is possible that we pulled it back before our next-in-flow
      // drain our overflow.
      PushChildren(lastChild->GetNextSibling(), lastChild);
      aReflowInput.mLineLayout->SetDirtyNextLine();
    }
  } else {
    // If the ruby base container is reflowed completely, the line
    // layout will remove the next-in-flows of that frame. But the
    // line layout is not aware of the ruby text containers, hence
    // it is necessary to remove them here.
    for (uint32_t i = 0; i < rtcCount; i++) {
      nsIFrame* nextRTC = textContainers[i]->GetNextInFlow();
      if (nextRTC) {
        nextRTC->GetParent()->DeleteNextInFlowChild(nextRTC, true);
      }
    }
  }

  nscoord segmentISize = baseMetrics.ISize(lineWM);
  const nsSize dummyContainerSize;
  LogicalRect baseRect =
    aBaseContainer->GetLogicalRect(lineWM, dummyContainerSize);
  // We need to position our rtc frames on one side or the other of the
  // base container's rect, using a coordinate space that's relative to
  // the ruby frame. Right now, the base container's rect's block-axis
  // position is relative to the block container frame containing the
  // lines, so we use 0 instead. (i.e. we assume that the base container
  // is adjacent to the ruby frame's block-start edge.)
  // XXX We may need to add border/padding here. See bug 1055667.
  baseRect.BStart(lineWM) = 0;
//.........这里部分代码省略.........

/**
 * This function returns the offset of an abs/fixed-pos child's static
 * position, with respect to the "start" corner of its alignment container,
 * according to CSS Box Alignment.  This function only operates in a single
 * axis at a time -- callers can choose which axis via the |aAbsPosCBAxis|
 * parameter.
 *
 * @param aKidReflowInput The ReflowInput for the to-be-aligned abspos child.
 * @param aKidSizeInAbsPosCBWM The child frame's size (after it's been given
 *                             the opportunity to reflow), in terms of the
 *                             containing block's WritingMode.
 * @param aPlaceholderContainer The parent of the child frame's corresponding
 *                              placeholder frame, cast to a nsContainerFrame.
 *                              (This will help us choose which alignment enum
 *                              we should use for the child.)
 * @param aAbsPosCBWM The child frame's containing block's WritingMode.
 * @param aAbsPosCBAxis The axis (of the containing block) that we should
 *                      be doing this computation for.
 */
static nscoord
OffsetToAlignedStaticPos(const ReflowInput& aKidReflowInput,
                         const LogicalSize& aKidSizeInAbsPosCBWM,
                         nsContainerFrame* aPlaceholderContainer,
                         WritingMode aAbsPosCBWM,
                         LogicalAxis aAbsPosCBAxis)
{
  if (!aPlaceholderContainer) {
    // (The placeholder container should be the thing that kicks this whole
    // process off, by setting PLACEHOLDER_STATICPOS_NEEDS_CSSALIGN.  So it
    // should exist... but bail gracefully if it doesn't.)
    NS_ERROR("Missing placeholder-container when computing a "
             "CSS Box Alignment static position");
    return 0;
  }

  // (Most of this function is simply preparing args that we'll pass to
  // AlignJustifySelf at the end.)

  // NOTE: Our alignment container is aPlaceholderContainer's content-box
  // (or an area within it, if aPlaceholderContainer is a grid). So, we'll
  // perform most of our arithmetic/alignment in aPlaceholderContainer's
  // WritingMode. For brevity, we use the abbreviation "pc" for "placeholder
  // container" in variables below.
  WritingMode pcWM = aPlaceholderContainer->GetWritingMode();

  // Find what axis aAbsPosCBAxis corresponds to, in placeholder's parent's
  // writing-mode.
  LogicalAxis pcAxis = (pcWM.IsOrthogonalTo(aAbsPosCBWM)
                        ? GetOrthogonalAxis(aAbsPosCBAxis)
                        : aAbsPosCBAxis);

  nsIAtom* parentType = aPlaceholderContainer->GetType();
  LogicalSize alignAreaSize(pcWM);
  if (parentType == nsGkAtoms::flexContainerFrame) {
    alignAreaSize = aPlaceholderContainer->GetLogicalSize(pcWM);
    LogicalMargin pcBorderPadding =
      aPlaceholderContainer->GetLogicalUsedBorderAndPadding(pcWM);
    alignAreaSize -= pcBorderPadding.Size(pcWM);
  } else {
    NS_ERROR("Unsupported container for abpsos CSS Box Alignment");
    return 0; // (leave the child at the start of its alignment container)
  }

  nscoord alignAreaSizeInAxis = (pcAxis == eLogicalAxisInline)
    ? alignAreaSize.ISize(pcWM)
    : alignAreaSize.BSize(pcWM);

  AlignJustifyFlags flags = AlignJustifyFlags::eIgnoreAutoMargins;
  uint16_t alignConst =
    aPlaceholderContainer->CSSAlignmentForAbsPosChild(aKidReflowInput, pcAxis);
  // XXXdholbert: Handle <overflow-position> in bug 1311892 (by conditionally
  // setting AlignJustifyFlags::eOverflowSafe in |flags|.)  For now, we behave
  // as if "unsafe" was the specified value (which is basically equivalent to
  // the default behavior, when no value is specified -- though the default
  // behavior also has some [at-risk] extra nuance about scroll containers...)
  // For now we ignore & strip off <overflow-position> bits, until bug 1311892.
  alignConst &= ~NS_STYLE_ALIGN_FLAG_BITS;

  // Find out if placeholder-container & the OOF child have the same start-sides
  // in the placeholder-container's pcAxis.
  WritingMode kidWM = aKidReflowInput.GetWritingMode();
  if (pcWM.ParallelAxisStartsOnSameSide(pcAxis, kidWM)) {
    flags |= AlignJustifyFlags::eSameSide;
  }

  // (baselineAdjust is unused. CSSAlignmentForAbsPosChild() should've
  // converted 'baseline'/'last baseline' enums to their fallback values.)
  const nscoord baselineAdjust = nscoord(0);

  // AlignJustifySelf operates in the kid's writing mode, so we need to
  // represent the child's size and the desired axis in that writing mode:
  LogicalSize kidSizeInOwnWM = aKidSizeInAbsPosCBWM.ConvertTo(kidWM,
                                                              aAbsPosCBWM);
  LogicalAxis kidAxis = (kidWM.IsOrthogonalTo(aAbsPosCBWM)
                         ? GetOrthogonalAxis(aAbsPosCBAxis)
                         : aAbsPosCBAxis);

  nscoord offset =
    CSSAlignUtils::AlignJustifySelf(alignConst, kidAxis, flags,
                                    baselineAdjust, alignAreaSizeInAxis,
//.........这里部分代码省略.........

void
nsVideoFrame::Reflow(nsPresContext* aPresContext,
                     ReflowOutput& aMetrics,
                     const ReflowInput& aReflowInput,
                     nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                 ("enter nsVideoFrame::Reflow: availSize=%d,%d",
                  aReflowInput.AvailableWidth(),
                  aReflowInput.AvailableHeight()));

  NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");

  aStatus = NS_FRAME_COMPLETE;

  const WritingMode myWM = aReflowInput.GetWritingMode();
  nscoord contentBoxBSize = aReflowInput.ComputedBSize();
  const nscoord borderBoxISize = aReflowInput.ComputedISize() +
    aReflowInput.ComputedLogicalBorderPadding().IStartEnd(myWM);
  const bool isBSizeShrinkWrapping = (contentBoxBSize == NS_INTRINSICSIZE);

  nscoord borderBoxBSize;
  if (!isBSizeShrinkWrapping) {
    borderBoxBSize = contentBoxBSize +
      aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
  }

  nsMargin borderPadding = aReflowInput.ComputedPhysicalBorderPadding();

  // Reflow the child frames. We may have up to three: an image
  // frame (for the poster image), a container frame for the controls,
  // and a container frame for the caption.
  for (nsIFrame* child : mFrames) {
    nsSize oldChildSize = child->GetSize();

    if (child->GetContent() == mPosterImage) {
      // Reflow the poster frame.
      nsImageFrame* imageFrame = static_cast<nsImageFrame*>(child);
      ReflowOutput kidDesiredSize(aReflowInput);
      WritingMode wm = imageFrame->GetWritingMode();
      LogicalSize availableSize = aReflowInput.AvailableSize(wm);
      LogicalSize cbSize = aMetrics.Size(aMetrics.GetWritingMode()).
                             ConvertTo(wm, aMetrics.GetWritingMode());
      ReflowInput kidReflowInput(aPresContext,
                                       aReflowInput,
                                       imageFrame,
                                       availableSize,
                                       &cbSize);

      nsRect posterRenderRect;
      if (ShouldDisplayPoster()) {
        posterRenderRect =
          nsRect(nsPoint(borderPadding.left, borderPadding.top),
                 nsSize(aReflowInput.ComputedWidth(),
                        aReflowInput.ComputedHeight()));
      }
      kidReflowInput.SetComputedWidth(posterRenderRect.width);
      kidReflowInput.SetComputedHeight(posterRenderRect.height);
      ReflowChild(imageFrame, aPresContext, kidDesiredSize, kidReflowInput,
                  posterRenderRect.x, posterRenderRect.y, 0, aStatus);
      FinishReflowChild(imageFrame, aPresContext,
                        kidDesiredSize, &kidReflowInput,
                        posterRenderRect.x, posterRenderRect.y, 0);

// Android still uses XUL media controls & hence needs this XUL-friendly
// custom reflow code. This will go away in bug 1310907.
#ifdef ANDROID
    } else if (child->GetContent() == mVideoControls) {
      // Reflow the video controls frame.
      nsBoxLayoutState boxState(PresContext(), aReflowInput.mRenderingContext);
      nsBoxFrame::LayoutChildAt(boxState,
                                child,
                                nsRect(borderPadding.left,
                                       borderPadding.top,
                                       aReflowInput.ComputedWidth(),
                                       aReflowInput.ComputedHeight()));

#endif // ANDROID
    } else if (child->GetContent() == mCaptionDiv ||
               child->GetContent() == mVideoControls) {
      // Reflow the caption and control bar frames.
      WritingMode wm = child->GetWritingMode();
      LogicalSize availableSize = aReflowInput.ComputedSize(wm);
      availableSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;

      ReflowInput kidReflowInput(aPresContext,
                                       aReflowInput,
                                       child,
                                       availableSize);
      ReflowOutput kidDesiredSize(kidReflowInput);
      ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput,
                  borderPadding.left, borderPadding.top, 0, aStatus);

      if (child->GetContent() == mVideoControls && isBSizeShrinkWrapping) {
        // Resolve our own BSize based on the controls' size in the same axis.
        contentBoxBSize = myWM.IsOrthogonalTo(wm) ?
          kidDesiredSize.ISize(wm) : kidDesiredSize.BSize(wm);
//.........这里部分代码省略.........