C++ WritingMode::IsVerticalRL方法代码示例

void
nsMeterFrame::ReflowBarFrame(nsIFrame*                aBarFrame,
                             nsPresContext*           aPresContext,
                             const nsHTMLReflowState& aReflowState,
                             nsReflowStatus&          aStatus)
{
  bool vertical = ResolvedOrientationIsVertical();
  WritingMode wm = aBarFrame->GetWritingMode();
  LogicalSize availSize = aReflowState.ComputedSize(wm);
  availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
  nsHTMLReflowState reflowState(aPresContext, aReflowState,
                                aBarFrame, availSize);
  nscoord size = vertical ? aReflowState.ComputedHeight()
                          : aReflowState.ComputedWidth();
  nscoord xoffset = aReflowState.ComputedPhysicalBorderPadding().left;
  nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;

  // NOTE: Introduce a new function getPosition in the content part ?
  HTMLMeterElement* meterElement = static_cast<HTMLMeterElement*>(mContent);

  double max = meterElement->Max();
  double min = meterElement->Min();
  double value = meterElement->Value();

  double position = max - min;
  position = position != 0 ? (value - min) / position : 1;

  size = NSToCoordRound(size * position);

  if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
    xoffset += aReflowState.ComputedWidth() - size;
  }

  // The bar position is *always* constrained.
  if (vertical) {
    // We want the bar to begin at the bottom.
    yoffset += aReflowState.ComputedHeight() - size;

    size -= reflowState.ComputedPhysicalMargin().TopBottom() +
            reflowState.ComputedPhysicalBorderPadding().TopBottom();
    size = std::max(size, 0);
    reflowState.SetComputedHeight(size);
  } else {
    size -= reflowState.ComputedPhysicalMargin().LeftRight() +
            reflowState.ComputedPhysicalBorderPadding().LeftRight();
    size = std::max(size, 0);
    reflowState.SetComputedWidth(size);
  }

  xoffset += reflowState.ComputedPhysicalMargin().left;
  yoffset += reflowState.ComputedPhysicalMargin().top;

  nsHTMLReflowMetrics barDesiredSize(reflowState);
  ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
              yoffset, 0, aStatus);
  FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
                    xoffset, yoffset, 0);
}

void
nsProgressFrame::ReflowBarFrame(nsIFrame*                aBarFrame,
                                nsPresContext*           aPresContext,
                                const nsHTMLReflowState& aReflowState,
                                nsReflowStatus&          aStatus)
{
  bool vertical = ResolvedOrientationIsVertical();
  WritingMode wm = aBarFrame->GetWritingMode();
  LogicalSize availSize = aReflowState.ComputedSize(wm);
  availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
  nsHTMLReflowState reflowState(aPresContext, aReflowState,
                                aBarFrame, availSize);
  nscoord size = vertical ? aReflowState.ComputedHeight()
                          : aReflowState.ComputedWidth();
  nscoord xoffset = aReflowState.ComputedPhysicalBorderPadding().left;
  nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;

  double position = static_cast<HTMLProgressElement*>(mContent)->Position();

  // Force the bar's size to match the current progress.
  // When indeterminate, the progress' size will be 100%.
  if (position >= 0.0) {
    size *= position;
  }

  if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
    xoffset += aReflowState.ComputedWidth() - size;
  }

  // The bar size is fixed in these cases:
  // - the progress position is determined: the bar size is fixed according
  //   to it's value.
  // - the progress position is indeterminate and the bar appearance should be
  //   shown as native: the bar size is forced to 100%.
  // Otherwise (when the progress is indeterminate and the bar appearance isn't
  // native), the bar size isn't fixed and can be set by the author.
  if (position != -1 || ShouldUseNativeStyle()) {
    if (vertical) {
      // We want the bar to begin at the bottom.
      yoffset += aReflowState.ComputedHeight() - size;

      size -= reflowState.ComputedPhysicalMargin().TopBottom() +
              reflowState.ComputedPhysicalBorderPadding().TopBottom();
      size = std::max(size, 0);
      reflowState.SetComputedHeight(size);
    } else {
      size -= reflowState.ComputedPhysicalMargin().LeftRight() +
              reflowState.ComputedPhysicalBorderPadding().LeftRight();
      size = std::max(size, 0);
      reflowState.SetComputedWidth(size);
    }
  } else if (vertical) {
    // For vertical progress bars, we need to position the bar specificly when
    // the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
    // because aReflowState.ComputedHeight() - size == 0.
    yoffset += aReflowState.ComputedHeight() - reflowState.ComputedHeight();
  }

  xoffset += reflowState.ComputedPhysicalMargin().left;
  yoffset += reflowState.ComputedPhysicalMargin().top;

  nsHTMLReflowMetrics barDesiredSize(aReflowState);
  ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
              yoffset, 0, aStatus);
  FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
                    xoffset, yoffset, 0);
}

//.........这里部分代码省略.........
        }
        child = nullptr;
        break;
      }
    }

    if (PresContext()->HasPendingInterrupt()) {
      // Stop the loop now while |child| still points to the frame that bailed
      // out.  We could keep going here and condition a bunch of the code in
      // this loop on whether there's an interrupt, or even just keep going and
      // trying to reflow the blocks (even though we know they'll interrupt
      // right after their first line), but stopping now is conceptually the
      // simplest (and probably fastest) thing.
      break;
    }

    // Advance to the next column
    child = child->GetNextSibling();

    if (child) {
      childOrigin.I(wm) += aConfig.mColISize + aConfig.mColGap;

#ifdef DEBUG_roc
      printf("*** NEXT CHILD ORIGIN.icoord = %d\n", childOrigin.I(wm));
#endif
    }
  }

  if (PresContext()->CheckForInterrupt(this) &&
      (GetStateBits() & NS_FRAME_IS_DIRTY)) {
    // Mark all our kids starting with |child| dirty

    // Note that this is a CheckForInterrupt call, not a HasPendingInterrupt,
    // because we might have interrupted while reflowing |child|, and since
    // we're about to add a dirty bit to |child| we need to make sure that
    // |this| is scheduled to have dirty bits marked on it and its ancestors.
    // Otherwise, when we go to mark dirty bits on |child|'s ancestors we'll
    // bail out immediately, since it'll already have a dirty bit.
    for (; child; child = child->GetNextSibling()) {
      child->AddStateBits(NS_FRAME_IS_DIRTY);
    }
  }

  aColData.mMaxBSize = contentBEnd;
  LogicalSize contentSize = LogicalSize(wm, contentRect.Size());
  contentSize.BSize(wm) = std::max(contentSize.BSize(wm), contentBEnd);
  mLastFrameStatus = aStatus;

  // Apply computed and min/max values
  if (aConfig.mComputedBSize != NS_INTRINSICSIZE) {
    if (aReflowInput.AvailableBSize() != NS_INTRINSICSIZE) {
      contentSize.BSize(wm) = std::min(contentSize.BSize(wm),
                                       aConfig.mComputedBSize);
    } else {
      contentSize.BSize(wm) = aConfig.mComputedBSize;
    }
  } else {
    // We add the "consumed" block-size back in so that we're applying
    // constraints to the correct bSize value, then subtract it again
    // after we've finished with the min/max calculation. This prevents us from
    // having a last continuation that is smaller than the min bSize. but which
    // has prev-in-flows, trigger a larger bSize than actually required.
    contentSize.BSize(wm) =
      aReflowInput.ApplyMinMaxBSize(contentSize.BSize(wm),
                                    aConfig.mConsumedBSize);
  }
  if (aReflowInput.ComputedISize() != NS_INTRINSICSIZE) {
    contentSize.ISize(wm) = aReflowInput.ComputedISize();
  } else {
    contentSize.ISize(wm) =
      aReflowInput.ApplyMinMaxISize(contentSize.ISize(wm));
  }

  contentSize.ISize(wm) += borderPadding.IStartEnd(wm);
  contentSize.BSize(wm) += borderPadding.BStartEnd(wm);
  aDesiredSize.SetSize(wm, contentSize);
  aDesiredSize.mOverflowAreas = overflowRects;
  aDesiredSize.UnionOverflowAreasWithDesiredBounds();

  // In vertical-rl mode, make a second pass if necessary to reposition the
  // columns with the correct container width. (In other writing modes,
  // correct containerSize was not required for column positioning so we don't
  // need this fixup.)
  if (wm.IsVerticalRL() && containerSize.width != contentSize.Width(wm)) {
    const nsSize finalContainerSize = aDesiredSize.PhysicalSize();
    for (nsIFrame* child : mFrames) {
      // Get the logical position as set previously using a provisional or
      // dummy containerSize, and reset with the correct container size.
      child->SetPosition(wm, child->GetLogicalPosition(wm, containerSize),
                         finalContainerSize);
    }
  }

#ifdef DEBUG_roc
  printf("*** DONE PASS feasible=%d\n", allFit && NS_FRAME_IS_FULLY_COMPLETE(aStatus)
         && !NS_FRAME_IS_TRUNCATED(aStatus));
#endif
  return allFit && NS_FRAME_IS_FULLY_COMPLETE(aStatus)
    && !NS_FRAME_IS_TRUNCATED(aStatus);
}

//.........这里部分代码省略.........
    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;
  // The rect for offsets of text containers.
  LogicalRect offsetRect = baseRect;
  RubyBlockLeadings descLeadings = aBaseContainer->GetDescendantLeadings();
  offsetRect.BStart(lineWM) -= descLeadings.mStart;
  offsetRect.BSize(lineWM) += descLeadings.mStart + descLeadings.mEnd;
  for (uint32_t i = 0; i < rtcCount; i++) {
    nsRubyTextContainerFrame* textContainer = textContainers[i];
    WritingMode rtcWM = textContainer->GetWritingMode();
    nsReflowStatus textReflowStatus;
    ReflowOutput textMetrics(aReflowInput);
    ReflowInput textReflowInput(aPresContext, aReflowInput, textContainer,
                                      availSize.ConvertTo(rtcWM, lineWM));
    textContainer->Reflow(aPresContext, textMetrics,
                          textReflowInput, textReflowStatus);
    // Ruby text containers always return complete reflow status even when
    // they have continuations, because the breaking has already been
    // handled when reflowing the base containers.
    NS_ASSERTION(textReflowStatus.IsEmpty(),
                 "Ruby text container must not break itself inside");
    // The metrics is initialized with reflow state of this ruby frame,
    // hence the writing-mode is tied to rubyWM instead of rtcWM.
    LogicalSize size = textMetrics.Size(rubyWM).ConvertTo(lineWM, rubyWM);
    textContainer->SetSize(lineWM, size);

    nscoord reservedISize = RubyUtils::GetReservedISize(textContainer);
    segmentISize = std::max(segmentISize, size.ISize(lineWM) + reservedISize);

    uint8_t rubyPosition = textContainer->StyleText()->mRubyPosition;
    MOZ_ASSERT(rubyPosition == NS_STYLE_RUBY_POSITION_OVER ||
               rubyPosition == NS_STYLE_RUBY_POSITION_UNDER);
    Maybe<LogicalSide> side;
    if (rubyPosition == NS_STYLE_RUBY_POSITION_OVER) {
      side.emplace(lineWM.LogicalSideForLineRelativeDir(eLineRelativeDirOver));
    } else if (rubyPosition == NS_STYLE_RUBY_POSITION_UNDER) {
      side.emplace(lineWM.LogicalSideForLineRelativeDir(eLineRelativeDirUnder));
    } else {
      // XXX inter-character support in bug 1055672
      MOZ_ASSERT_UNREACHABLE("Unsupported ruby-position");
    }

    LogicalPoint position(lineWM);
    if (side.isSome()) {
      if (nsLayoutUtils::IsInterCharacterRubyEnabled() &&
          rtcWM.IsVerticalRL() &&
          lineWM.GetInlineDir() == WritingMode::eInlineLTR) {
        // Inter-character ruby annotations are only supported for vertical-rl
        // in ltr horizontal writing. Fall back to non-inter-character behavior
        // otherwise.
        LogicalPoint offset(lineWM, offsetRect.ISize(lineWM),
          offsetRect.BSize(lineWM) > size.BSize(lineWM) ?
          (offsetRect.BSize(lineWM) - size.BSize(lineWM)) / 2 : 0);
        position = offsetRect.Origin(lineWM) + offset;
        aReflowInput.mLineLayout->AdvanceICoord(size.ISize(lineWM));
      } else if (side.value() == eLogicalSideBStart) {
        offsetRect.BStart(lineWM) -= size.BSize(lineWM);
        offsetRect.BSize(lineWM) += size.BSize(lineWM);
        position = offsetRect.Origin(lineWM);
      } else if (side.value() == eLogicalSideBEnd) {
        position = offsetRect.Origin(lineWM) +
          LogicalPoint(lineWM, 0, offsetRect.BSize(lineWM));
        offsetRect.BSize(lineWM) += size.BSize(lineWM);
      } else {
        MOZ_ASSERT_UNREACHABLE("???");
      }
    }
    // Using a dummy container-size here, so child positioning may not be
    // correct. We will fix it in nsLineLayout after the whole line is
    // reflowed.
    FinishReflowChild(textContainer, aPresContext, textMetrics,
                      &textReflowInput, lineWM, position, dummyContainerSize, 0);
  }
  MOZ_ASSERT(baseRect.ISize(lineWM) == offsetRect.ISize(lineWM),
             "Annotations should only be placed on the block directions");

  nscoord deltaISize = segmentISize - baseMetrics.ISize(lineWM);
  if (deltaISize <= 0) {
    RubyUtils::ClearReservedISize(aBaseContainer);
  } else {
    RubyUtils::SetReservedISize(aBaseContainer, deltaISize);
    aReflowInput.mLineLayout->AdvanceICoord(deltaISize);
  }

  // Set block leadings of the base container
  nscoord startLeading = baseRect.BStart(lineWM) - offsetRect.BStart(lineWM);
  nscoord endLeading = offsetRect.BEnd(lineWM) - baseRect.BEnd(lineWM);
  // XXX When bug 765861 gets fixed, this warning should be upgraded.
  NS_WARNING_ASSERTION(startLeading >= 0 && endLeading >= 0,
                       "Leadings should be non-negative (because adding "
                       "ruby annotation can only increase the size)");
  mLeadings.Update(startLeading, endLeading);
}