void
nsTableWrapperFrame::OuterDoReflowChild(nsPresContext*             aPresContext,
                                        nsIFrame*                  aChildFrame,
                                        const ReflowInput&   aChildRI,
                                        ReflowOutput&       aMetrics,
                                        nsReflowStatus&            aStatus)
{
  // Using zero as containerSize here because we want consistency between
  // the GetLogicalPosition and ReflowChild calls, to avoid unnecessarily
  // changing the frame's coordinates; but we don't yet know its final
  // position anyway so the actual value is unimportant.
  const nsSize zeroCSize;
  WritingMode wm = aChildRI.GetWritingMode();

  // Use the current position as a best guess for placement.
  LogicalPoint childPt = aChildFrame->GetLogicalPosition(wm, zeroCSize);
  uint32_t flags = NS_FRAME_NO_MOVE_FRAME;

  // We don't want to delete our next-in-flow's child if it's an inner table
  // frame, because table wrapper frames always assume that their inner table
  // frames don't go away. If a table wrapper frame is removed because it is
  // a next-in-flow of an already complete table wrapper frame, then it will
  // take care of removing it's inner table frame.
  if (aChildFrame == InnerTableFrame()) {
    flags |= NS_FRAME_NO_DELETE_NEXT_IN_FLOW_CHILD;
  }

  ReflowChild(aChildFrame, aPresContext, aMetrics, aChildRI,
              wm, childPt, zeroCSize, flags, aStatus);
}
void
nsTableWrapperFrame::InitChildReflowInput(nsPresContext& aPresContext,
                                          ReflowInput&   aReflowInput)
{
  nsMargin collapseBorder;
  nsMargin collapsePadding(0,0,0,0);
  nsMargin* pCollapseBorder  = nullptr;
  nsMargin* pCollapsePadding = nullptr;
  Maybe<LogicalSize> cbSize;
  if (aReflowInput.mFrame == InnerTableFrame()) {
    WritingMode wm = aReflowInput.GetWritingMode();
    if (InnerTableFrame()->IsBorderCollapse()) {
      LogicalMargin border = InnerTableFrame()->GetIncludedOuterBCBorder(wm);
      collapseBorder = border.GetPhysicalMargin(wm);
      pCollapseBorder = &collapseBorder;
      pCollapsePadding = &collapsePadding;
    }
    // Propagate our stored CB size if present, minus any margins.
    if (!HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) {
      LogicalSize* cb = Properties().Get(GridItemCBSizeProperty());
      if (cb) {
        cbSize.emplace(*cb);
        *cbSize -= aReflowInput.ComputedLogicalMargin().Size(wm);
      }
    }
  }
  aReflowInput.Init(&aPresContext, cbSize.ptrOr(nullptr), pCollapseBorder,
                    pCollapsePadding);
}
void
nsSVGForeignObjectFrame::Reflow(nsPresContext*           aPresContext,
                                ReflowOutput&     aDesiredSize,
                                const ReflowInput& aReflowInput,
                                nsReflowStatus&          aStatus)
{
  MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
             "Should not have been called");

  // Only InvalidateAndScheduleBoundsUpdate marks us with NS_FRAME_IS_DIRTY,
  // so if that bit is still set we still have a resize pending. If we hit
  // this assertion, then we should get the presShell to skip reflow roots
  // that have a dirty parent since a reflow is going to come via the
  // reflow root's parent anyway.
  NS_ASSERTION(!(GetStateBits() & NS_FRAME_IS_DIRTY),
               "Reflowing while a resize is pending is wasteful");

  // ReflowSVG makes sure mRect is up to date before we're called.

  NS_ASSERTION(!aReflowInput.mParentReflowInput,
               "should only get reflow from being reflow root");
  NS_ASSERTION(aReflowInput.ComputedWidth() == GetSize().width &&
               aReflowInput.ComputedHeight() == GetSize().height,
               "reflow roots should be reflowed at existing size and "
               "svg.css should ensure we have no padding/border/margin");

  DoReflow();

  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalSize finalSize(wm, aReflowInput.ComputedISize(),
                        aReflowInput.ComputedBSize());
  aDesiredSize.SetSize(wm, finalSize);
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  aStatus = NS_FRAME_COMPLETE;
}
Ejemplo n.º 4
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// Return the inline-size that the float (including margins) will take up
// in the writing mode of the containing block. If this returns
// NS_UNCONSTRAINEDSIZE, we're dealing with an orthogonal block that
// has block-size:auto, and we'll need to actually reflow it to find out
// how much inline-size it will occupy in the containing block's mode.
static nscoord
FloatMarginISize(const ReflowInput& aCBReflowInput,
                 nscoord aFloatAvailableISize,
                 nsIFrame *aFloat,
                 const SizeComputationInput& aFloatOffsetState)
{
  AutoMaybeDisableFontInflation an(aFloat);
  WritingMode wm = aFloatOffsetState.GetWritingMode();

  LogicalSize floatSize =
    aFloat->ComputeSize(
              aCBReflowInput.mRenderingContext,
              wm,
              aCBReflowInput.ComputedSize(wm),
              aFloatAvailableISize,
              aFloatOffsetState.ComputedLogicalMargin().Size(wm),
              aFloatOffsetState.ComputedLogicalBorderPadding().Size(wm) -
                aFloatOffsetState.ComputedLogicalPadding().Size(wm),
              aFloatOffsetState.ComputedLogicalPadding().Size(wm),
              nsIFrame::ComputeSizeFlags::eShrinkWrap);

  WritingMode cbwm = aCBReflowInput.GetWritingMode();
  nscoord floatISize = floatSize.ConvertTo(cbwm, wm).ISize(cbwm);
  if (floatISize == NS_UNCONSTRAINEDSIZE) {
    return NS_UNCONSTRAINEDSIZE; // reflow is needed to get the true size
  }

  return floatISize +
         aFloatOffsetState.ComputedLogicalMargin().Size(wm).
           ConvertTo(cbwm, wm).ISize(cbwm) +
         aFloatOffsetState.ComputedLogicalBorderPadding().Size(wm).
           ConvertTo(cbwm, wm).ISize(cbwm);
}
Ejemplo n.º 5
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void
nsProgressFrame::Reflow(nsPresContext*           aPresContext,
                        ReflowOutput&     aDesiredSize,
                        const ReflowInput& aReflowInput,
                        nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
  NS_ASSERTION(!GetPrevContinuation(),
               "nsProgressFrame should not have continuations; if it does we "
               "need to call RegUnregAccessKey only for the first.");

  if (mState & NS_FRAME_FIRST_REFLOW) {
    nsFormControlFrame::RegUnRegAccessKey(this, true);
  }

  nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
  NS_ASSERTION(barFrame, "The progress frame should have a child with a frame!");

  ReflowBarFrame(barFrame, aPresContext, aReflowInput, aStatus);

  aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
                       aReflowInput.ComputedSizeWithBorderPadding());
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
  FinishAndStoreOverflow(&aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
Ejemplo n.º 6
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void
nsTextControlFrame::Reflow(nsPresContext*   aPresContext,
                           ReflowOutput&     aDesiredSize,
                           const ReflowInput& aReflowInput,
                           nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsTextControlFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  // make sure that the form registers itself on the initial/first reflow
  if (mState & NS_FRAME_FIRST_REFLOW) {
    nsFormControlFrame::RegUnRegAccessKey(this, true);
  }

  // set values of reflow's out parameters
  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalSize
    finalSize(wm,
              aReflowInput.ComputedISize() +
              aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm),
              aReflowInput.ComputedBSize() +
              aReflowInput.ComputedLogicalBorderPadding().BStartEnd(wm));
  aDesiredSize.SetSize(wm, finalSize);

  // computation of the ascent wrt the input height
  nscoord lineHeight = aReflowInput.ComputedBSize();
  float inflation = nsLayoutUtils::FontSizeInflationFor(this);
  if (!IsSingleLineTextControl()) {
    lineHeight = ReflowInput::CalcLineHeight(GetContent(), StyleContext(),
                                                   NS_AUTOHEIGHT, inflation);
  }
  RefPtr<nsFontMetrics> fontMet =
    nsLayoutUtils::GetFontMetricsForFrame(this, inflation);
  // now adjust for our borders and padding
  aDesiredSize.SetBlockStartAscent(
    nsLayoutUtils::GetCenteredFontBaseline(fontMet, lineHeight,
                                           wm.IsLineInverted()) +
    aReflowInput.ComputedLogicalBorderPadding().BStart(wm));

  // overflow handling
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  // perform reflow on all kids
  nsIFrame* kid = mFrames.FirstChild();
  while (kid) {
    ReflowTextControlChild(kid, aPresContext, aReflowInput, aStatus, aDesiredSize);
    kid = kid->GetNextSibling();
  }

  // take into account css properties that affect overflow handling
  FinishAndStoreOverflow(&aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
Ejemplo n.º 7
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static nscoord
GetAvailableContentISize(const ReflowInput& aReflowInput)
{
  if (aReflowInput.AvailableISize() == NS_INTRINSICSIZE) {
    return NS_INTRINSICSIZE;
  }

  WritingMode wm = aReflowInput.GetWritingMode();
  nscoord borderPaddingISize =
    aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm);
  return std::max(0, aReflowInput.AvailableISize() - borderPaddingISize);
}
Ejemplo n.º 8
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nscoord
nsColumnSetFrame::GetAvailableContentBSize(const ReflowInput& aReflowInput)
{
  if (aReflowInput.AvailableBSize() == NS_INTRINSICSIZE) {
    return NS_INTRINSICSIZE;
  }

  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalMargin bp = aReflowInput.ComputedLogicalBorderPadding();
  bp.ApplySkipSides(GetLogicalSkipSides(&aReflowInput));
  bp.BEnd(wm) = aReflowInput.ComputedLogicalBorderPadding().BEnd(wm);
  return std::max(0, aReflowInput.AvailableBSize() - bp.BStartEnd(wm));
}
void
nsTableWrapperFrame::InitChildReflowInput(nsPresContext&     aPresContext,
                                          ReflowInput& aReflowInput)
{
  nsMargin collapseBorder;
  nsMargin collapsePadding(0,0,0,0);
  nsMargin* pCollapseBorder  = nullptr;
  nsMargin* pCollapsePadding = nullptr;
  if (aReflowInput.mFrame == InnerTableFrame() &&
      InnerTableFrame()->IsBorderCollapse()) {
    WritingMode wm = aReflowInput.GetWritingMode();
    LogicalMargin border = InnerTableFrame()->GetIncludedOuterBCBorder(wm);
    collapseBorder = border.GetPhysicalMargin(wm);
    pCollapseBorder = &collapseBorder;
    pCollapsePadding = &collapsePadding;
  }
  aReflowInput.Init(&aPresContext, nullptr, pCollapseBorder, pCollapsePadding);
}
Ejemplo n.º 10
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nscoord
nsSplittableFrame::GetEffectiveComputedBSize(const ReflowInput& aReflowInput,
                                              nscoord aConsumedBSize) const
{
  nscoord bSize = aReflowInput.ComputedBSize();
  if (bSize == NS_INTRINSICSIZE) {
    return NS_INTRINSICSIZE;
  }

  if (aConsumedBSize == NS_INTRINSICSIZE) {
    aConsumedBSize = ConsumedBSize(aReflowInput.GetWritingMode());
  }

  bSize -= aConsumedBSize;

  // We may have stretched the frame beyond its computed height. Oh well.
  return std::max(0, bSize);
}
Ejemplo n.º 11
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/* virtual */ void
nsBackdropFrame::Reflow(nsPresContext* aPresContext,
                        ReflowOutput& aDesiredSize,
                        const ReflowInput& aReflowInput,
                        nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsBackdropFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  // Note that this frame is a child of the viewport frame.
  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalMargin borderPadding = aReflowInput.ComputedLogicalBorderPadding();
  nscoord isize = aReflowInput.ComputedISize() + borderPadding.IStartEnd(wm);
  nscoord bsize = aReflowInput.ComputedBSize() + borderPadding.BStartEnd(wm);
  aDesiredSize.SetSize(wm, LogicalSize(wm, isize, bsize));
  aStatus = NS_FRAME_COMPLETE;
}
void
nsSimplePageSequenceFrame::SetDesiredSize(ReflowOutput& aDesiredSize,
                                          const ReflowInput& aReflowInput,
                                          nscoord aWidth,
                                          nscoord aHeight)
{
  // Aim to fill the whole size of the document, not only so we
  // can act as a background in print preview but also handle overflow
  // in child page frames correctly.
  // Use availableISize so we don't cause a needless horizontal scrollbar.
  WritingMode wm = aReflowInput.GetWritingMode();
  nscoord scaledWidth = aWidth * PresContext()->GetPrintPreviewScale();
  nscoord scaledHeight = aHeight * PresContext()->GetPrintPreviewScale();

  nscoord scaledISize = (wm.IsVertical() ? scaledHeight : scaledWidth);
  nscoord scaledBSize = (wm.IsVertical() ? scaledWidth : scaledHeight);

  aDesiredSize.ISize(wm) = std::max(scaledISize, aReflowInput.AvailableISize());
  aDesiredSize.BSize(wm) = std::max(scaledBSize, aReflowInput.ComputedBSize());
}
// Helper-function that lets us clone the button's reflow state, but with its
// ComputedWidth and ComputedHeight reduced by the amount of renderer-specific
// focus border and padding that we're using. (This lets us provide a more
// appropriate content-box size for descendents' percent sizes to resolve
// against.)
static ReflowInput
CloneReflowInputWithReducedContentBox(
  const ReflowInput& aButtonReflowInput,
  const LogicalMargin& aFocusPadding)
{
  auto wm = aButtonReflowInput.GetWritingMode();
  nscoord adjustedISize = aButtonReflowInput.ComputedISize();
  adjustedISize -= aFocusPadding.IStartEnd(wm);
  adjustedISize = std::max(0, adjustedISize);

  // (Only adjust the block-size if it's an actual length.)
  nscoord adjustedBSize = aButtonReflowInput.ComputedBSize();
  if (adjustedBSize != NS_INTRINSICSIZE) {
    adjustedBSize -= aFocusPadding.BStartEnd(wm);
    adjustedBSize = std::max(0, adjustedBSize);
  }

  ReflowInput clone(aButtonReflowInput);
  clone.SetComputedISize(adjustedISize);
  clone.SetComputedBSize(adjustedBSize);

  return clone;
}
// get the margin and padding data. ReflowInput doesn't handle the
// case of auto margins
void
nsTableWrapperFrame::GetChildMargin(nsPresContext*           aPresContext,
                                    const ReflowInput& aOuterRI,
                                    nsIFrame*                aChildFrame,
                                    nscoord                  aAvailISize,
                                    LogicalMargin&           aMargin)
{
  NS_ASSERTION(!aChildFrame->IsTableCaption(),
               "didn't expect caption frame; writing-mode may be wrong!");

  // construct a reflow state to compute margin and padding. Auto margins
  // will not be computed at this time.

  // create and init the child reflow state
  // XXX We really shouldn't construct a reflow state to do this.
  WritingMode wm = aOuterRI.GetWritingMode();
  LogicalSize availSize(wm, aAvailISize, aOuterRI.AvailableSize(wm).BSize(wm));
  ReflowInput childRI(aPresContext, aOuterRI, aChildFrame, availSize,
                            nullptr, ReflowInput::CALLER_WILL_INIT);
  InitChildReflowInput(*aPresContext, childRI);

  aMargin = childRI.ComputedLogicalMargin();
}
/**
 * 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,
                                    aKidReflowInput, kidSizeInOwnWM);

  // "offset" is in terms of the CSS Box Alignment container (i.e. it's in
  // terms of pcWM). But our return value needs to in terms of the containing
  // block's writing mode, which might have the opposite directionality in the
  // given axis. In that case, we just need to negate "offset" when returning,
  // to make it have the right effect as an offset for coordinates in the
  // containing block's writing mode.
  if (!pcWM.ParallelAxisStartsOnSameSide(pcAxis, aAbsPosCBWM)) {
    return -offset;
  }
  return offset;
}
Ejemplo n.º 16
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void
nsTableCellFrame::Reflow(nsPresContext*           aPresContext,
                         ReflowOutput&     aDesiredSize,
                         const ReflowInput& aReflowInput,
                         nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsTableCellFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  if (aReflowInput.mFlags.mSpecialBSizeReflow) {
    FirstInFlow()->AddStateBits(NS_TABLE_CELL_HAD_SPECIAL_REFLOW);
  }

  // see if a special bsize reflow needs to occur due to having a pct height
  nsTableFrame::CheckRequestSpecialBSizeReflow(aReflowInput);

  aStatus = NS_FRAME_COMPLETE;
  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalSize availSize(wm, aReflowInput.AvailableISize(),
                            aReflowInput.AvailableBSize());

  LogicalMargin borderPadding = aReflowInput.ComputedLogicalPadding();
  LogicalMargin border = GetBorderWidth(wm);
  borderPadding += border;

  // reduce available space by insets, if we're in a constrained situation
  availSize.ISize(wm) -= borderPadding.IStartEnd(wm);
  if (NS_UNCONSTRAINEDSIZE != availSize.BSize(wm)) {
    availSize.BSize(wm) -= borderPadding.BStartEnd(wm);
  }

  // Try to reflow the child into the available space. It might not
  // fit or might need continuing.
  if (availSize.BSize(wm) < 0) {
    availSize.BSize(wm) = 1;
  }

  ReflowOutput kidSize(wm, aDesiredSize.mFlags);
  kidSize.ClearSize();
  SetPriorAvailISize(aReflowInput.AvailableISize());
  nsIFrame* firstKid = mFrames.FirstChild();
  NS_ASSERTION(firstKid, "Frame construction error, a table cell always has an inner cell frame");
  nsTableFrame* tableFrame = GetTableFrame();

  if (aReflowInput.mFlags.mSpecialBSizeReflow) {
    const_cast<ReflowInput&>(aReflowInput).
      SetComputedBSize(BSize(wm) - borderPadding.BStartEnd(wm));
    DISPLAY_REFLOW_CHANGE();
  }
  else if (aPresContext->IsPaginated()) {
    nscoord computedUnpaginatedBSize =
      CalcUnpaginatedBSize((nsTableCellFrame&)*this,
                           *tableFrame, borderPadding.BStartEnd(wm));
    if (computedUnpaginatedBSize > 0) {
      const_cast<ReflowInput&>(aReflowInput).SetComputedBSize(computedUnpaginatedBSize);
      DISPLAY_REFLOW_CHANGE();
    }
  }
  else {
    SetHasPctOverBSize(false);
  }

  WritingMode kidWM = firstKid->GetWritingMode();
  ReflowInput kidReflowInput(aPresContext, aReflowInput, firstKid,
                                   availSize.ConvertTo(kidWM, wm));

  // Don't be a percent height observer if we're in the middle of
  // special-bsize reflow, in case we get an accidental NotifyPercentBSize()
  // call (which we shouldn't honor during special-bsize reflow)
  if (!aReflowInput.mFlags.mSpecialBSizeReflow) {
    // mPercentBSizeObserver is for children of cells in quirks mode,
    // but only those than are tables in standards mode.  NeedsToObserve
    // will determine how far this is propagated to descendants.
    kidReflowInput.mPercentBSizeObserver = this;
  }
  // Don't propagate special bsize reflow state to our kids
  kidReflowInput.mFlags.mSpecialBSizeReflow = false;

  if (aReflowInput.mFlags.mSpecialBSizeReflow ||
      FirstInFlow()->HasAnyStateBits(NS_TABLE_CELL_HAD_SPECIAL_REFLOW)) {
    // We need to force the kid to have mBResize set if we've had a
    // special reflow in the past, since the non-special reflow needs to
    // resize back to what it was without the special bsize reflow.
    kidReflowInput.SetBResize(true);
  }

  nsSize containerSize =
    aReflowInput.ComputedSizeAsContainerIfConstrained();

  LogicalPoint kidOrigin(wm, borderPadding.IStart(wm),
                         borderPadding.BStart(wm));
  nsRect origRect = firstKid->GetRect();
  nsRect origVisualOverflow = firstKid->GetVisualOverflowRect();
  bool firstReflow = firstKid->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);

  ReflowChild(firstKid, aPresContext, kidSize, kidReflowInput,
              wm, kidOrigin, containerSize, 0, aStatus);
  if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus)) {
    // Don't pass OVERFLOW_INCOMPLETE through tables until they can actually handle it
    //XXX should paginate overflow as overflow, but not in this patch (bug 379349)
    NS_FRAME_SET_INCOMPLETE(aStatus);
    printf("Set table cell incomplete %p\n", static_cast<void*>(this));
  }

  // XXXbz is this invalidate actually needed, really?
  if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) {
    InvalidateFrameSubtree();
  }

#ifdef DEBUG
  DebugCheckChildSize(firstKid, kidSize);
#endif

  // 0 dimensioned cells need to be treated specially in Standard/NavQuirks mode
  // see testcase "emptyCells.html"
  nsIFrame* prevInFlow = GetPrevInFlow();
  bool isEmpty;
  if (prevInFlow) {
    isEmpty = static_cast<nsTableCellFrame*>(prevInFlow)->GetContentEmpty();
  } else {
    isEmpty = !CellHasVisibleContent(kidSize.Height(), tableFrame, firstKid);
  }
  SetContentEmpty(isEmpty);

  // Place the child
  FinishReflowChild(firstKid, aPresContext, kidSize, &kidReflowInput,
                    wm, kidOrigin, containerSize, 0);

  nsTableFrame::InvalidateTableFrame(firstKid, origRect, origVisualOverflow,
                                     firstReflow);

  // first, compute the bsize which can be set w/o being restricted by
  // available bsize
  LogicalSize cellSize(wm);
  cellSize.BSize(wm) = kidSize.BSize(wm);

  if (NS_UNCONSTRAINEDSIZE != cellSize.BSize(wm)) {
    cellSize.BSize(wm) += borderPadding.BStartEnd(wm);
  }

  // next determine the cell's isize
  cellSize.ISize(wm) = kidSize.ISize(wm);      // at this point, we've factored in the cell's style attributes

  // factor in border and padding
  if (NS_UNCONSTRAINEDSIZE != cellSize.ISize(wm)) {
    cellSize.ISize(wm) += borderPadding.IStartEnd(wm);
  }

  // set the cell's desired size and max element size
  aDesiredSize.SetSize(wm, cellSize);

  // the overflow area will be computed when BlockDirAlignChild() gets called

  if (aReflowInput.mFlags.mSpecialBSizeReflow) {
    if (aDesiredSize.BSize(wm) > BSize(wm)) {
      // set a bit indicating that the pct bsize contents exceeded
      // the height that they could honor in the pass 2 reflow
      SetHasPctOverBSize(true);
    }
    if (NS_UNCONSTRAINEDSIZE == aReflowInput.AvailableBSize()) {
      aDesiredSize.BSize(wm) = BSize(wm);
    }
  }

  // If our parent is in initial reflow, it'll handle invalidating our
  // entire overflow rect.
  if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW) &&
      nsSize(aDesiredSize.Width(), aDesiredSize.Height()) != mRect.Size()) {
    InvalidateFrame();
  }

  // remember the desired size for this reflow
  SetDesiredSize(aDesiredSize);

  // Any absolutely-positioned children will get reflowed in
  // nsFrame::FixupPositionedTableParts in another pass, so propagate our
  // dirtiness to them before our parent clears our dirty bits.
  PushDirtyBitToAbsoluteFrames();

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
Ejemplo n.º 17
0
void
nsSubDocumentFrame::Reflow(nsPresContext*           aPresContext,
                           ReflowOutput&     aDesiredSize,
                           const ReflowInput& aReflowInput,
                           nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsSubDocumentFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
     ("enter nsSubDocumentFrame::Reflow: maxSize=%d,%d",
      aReflowInput.AvailableWidth(), aReflowInput.AvailableHeight()));

  NS_ASSERTION(aReflowInput.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
               "Shouldn't have unconstrained stuff here "
               "thanks to the rules of reflow");
  NS_ASSERTION(NS_INTRINSICSIZE != aReflowInput.ComputedHeight(),
               "Shouldn't have unconstrained stuff here "
               "thanks to ComputeAutoSize");

  aStatus = NS_FRAME_COMPLETE;

  NS_ASSERTION(mContent->GetPrimaryFrame() == this,
               "Shouldn't happen");

  // XUL <iframe> or <browser>, or HTML <iframe>, <object> or <embed>
  aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
                       aReflowInput.ComputedSizeWithBorderPadding());

  // "offset" is the offset of our content area from our frame's
  // top-left corner.
  nsPoint offset = nsPoint(aReflowInput.ComputedPhysicalBorderPadding().left,
                           aReflowInput.ComputedPhysicalBorderPadding().top);

  if (mInnerView) {
    const nsMargin& bp = aReflowInput.ComputedPhysicalBorderPadding();
    nsSize innerSize(aDesiredSize.Width() - bp.LeftRight(),
                     aDesiredSize.Height() - bp.TopBottom());

    // Size & position the view according to 'object-fit' & 'object-position'.
    nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
    IntrinsicSize intrinsSize;
    nsSize intrinsRatio;
    if (subDocRoot) {
      intrinsSize = subDocRoot->GetIntrinsicSize();
      intrinsRatio = subDocRoot->GetIntrinsicRatio();
    }
    nsRect destRect =
      nsLayoutUtils::ComputeObjectDestRect(nsRect(offset, innerSize),
                                           intrinsSize, intrinsRatio,
                                           StylePosition());

    nsViewManager* vm = mInnerView->GetViewManager();
    vm->MoveViewTo(mInnerView, destRect.x, destRect.y);
    vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), destRect.Size()), true);
  }

  aDesiredSize.SetOverflowAreasToDesiredBounds();
  if (!ShouldClipSubdocument()) {
    nsIFrame* subdocRootFrame = GetSubdocumentRootFrame();
    if (subdocRootFrame) {
      aDesiredSize.mOverflowAreas.UnionWith(subdocRootFrame->GetOverflowAreas() + offset);
    }
  }

  FinishAndStoreOverflow(&aDesiredSize);

  if (!aPresContext->IsPaginated() && !mPostedReflowCallback) {
    PresContext()->PresShell()->PostReflowCallback(this);
    mPostedReflowCallback = true;
  }

  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
     ("exit nsSubDocumentFrame::Reflow: size=%d,%d status=%x",
      aDesiredSize.Width(), aDesiredSize.Height(), aStatus));

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
Ejemplo n.º 18
0
void
BRFrame::Reflow(nsPresContext* aPresContext,
                ReflowOutput& aMetrics,
                const ReflowInput& aReflowInput,
                nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("BRFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalSize finalSize(wm);
  finalSize.BSize(wm) = 0; // BR frames with block size 0 are ignored in quirks
                           // mode by nsLineLayout::VerticalAlignFrames .
                           // However, it's not always 0.  See below.
  finalSize.ISize(wm) = 0;
  aMetrics.SetBlockStartAscent(0);

  // Only when the BR is operating in a line-layout situation will it
  // behave like a BR. Additionally, we suppress breaks from BR inside
  // of ruby frames. To determine if we're inside ruby, we have to rely
  // on the *parent's* ShouldSuppressLineBreak() method, instead of our
  // own, because we may have custom "display" value that makes our
  // ShouldSuppressLineBreak() return false.
  nsLineLayout* ll = aReflowInput.mLineLayout;
  if (ll && !GetParent()->StyleContext()->ShouldSuppressLineBreak()) {
    // Note that the compatibility mode check excludes AlmostStandards
    // mode, since this is the inline box model.  See bug 161691.
    if ( ll->LineIsEmpty() ||
         aPresContext->CompatibilityMode() == eCompatibility_FullStandards ) {
      // The line is logically empty; any whitespace is trimmed away.
      //
      // If this frame is going to terminate the line we know
      // that nothing else will go on the line. Therefore, in this
      // case, we provide some height for the BR frame so that it
      // creates some vertical whitespace.  It's necessary to use the
      // line-height rather than the font size because the
      // quirks-mode fix that doesn't apply the block's min
      // line-height makes this necessary to make BR cause a line
      // of the full line-height

      // We also do this in strict mode because BR should act like a
      // normal inline frame.  That line-height is used is important
      // here for cases where the line-height is less than 1.
      RefPtr<nsFontMetrics> fm =
        nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
      if (fm) {
        nscoord logicalHeight = aReflowInput.CalcLineHeight();
        finalSize.BSize(wm) = logicalHeight;
        aMetrics.SetBlockStartAscent(nsLayoutUtils::GetCenteredFontBaseline(
                                       fm, logicalHeight, wm.IsLineInverted()));
      }
      else {
        aMetrics.SetBlockStartAscent(aMetrics.BSize(wm) = 0);
      }

      // XXX temporary until I figure out a better solution; see the
      // code in nsLineLayout::VerticalAlignFrames that zaps minY/maxY
      // if the width is zero.
      // XXX This also fixes bug 10036!
      // Warning: nsTextControlFrame::CalculateSizeStandard depends on
      // the following line, see bug 228752.
      // The code below in AddInlinePrefISize also adds 1 appunit to width
      finalSize.ISize(wm) = 1;
    }

    // Return our reflow status
    uint32_t breakType = aReflowInput.mStyleDisplay->PhysicalBreakType(wm);
    if (NS_STYLE_CLEAR_NONE == breakType) {
      breakType = NS_STYLE_CLEAR_LINE;
    }

    aStatus = NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
      NS_INLINE_MAKE_BREAK_TYPE(breakType);
    ll->SetLineEndsInBR(true);
  }
  else {
    aStatus = NS_FRAME_COMPLETE;
  }

  aMetrics.SetSize(wm, finalSize);
  aMetrics.SetOverflowAreasToDesiredBounds();

  mAscent = aMetrics.BlockStartAscent();

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
}
Ejemplo n.º 19
0
void
nsFirstLetterFrame::Reflow(nsPresContext*          aPresContext,
                           ReflowOutput&     aMetrics,
                           const ReflowInput& aReflowInput,
                           nsReflowStatus&          aReflowStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsFirstLetterFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aReflowStatus);

  // Grab overflow list
  DrainOverflowFrames(aPresContext);

  nsIFrame* kid = mFrames.FirstChild();

  // Setup reflow state for our child
  WritingMode wm = aReflowInput.GetWritingMode();
  LogicalSize availSize = aReflowInput.AvailableSize();
  const LogicalMargin& bp = aReflowInput.ComputedLogicalBorderPadding();
  NS_ASSERTION(availSize.ISize(wm) != NS_UNCONSTRAINEDSIZE,
               "should no longer use unconstrained inline size");
  availSize.ISize(wm) -= bp.IStartEnd(wm);
  if (NS_UNCONSTRAINEDSIZE != availSize.BSize(wm)) {
    availSize.BSize(wm) -= bp.BStartEnd(wm);
  }

  WritingMode lineWM = aMetrics.GetWritingMode();
  ReflowOutput kidMetrics(lineWM);

  // Reflow the child
  if (!aReflowInput.mLineLayout) {
    // When there is no lineLayout provided, we provide our own. The
    // only time that the first-letter-frame is not reflowing in a
    // line context is when its floating.
    WritingMode kidWritingMode = WritingModeForLine(wm, kid);
    LogicalSize kidAvailSize = availSize.ConvertTo(kidWritingMode, wm);
    ReflowInput rs(aPresContext, aReflowInput, kid, kidAvailSize);
    nsLineLayout ll(aPresContext, nullptr, &aReflowInput, nullptr, nullptr);

    ll.BeginLineReflow(bp.IStart(wm), bp.BStart(wm),
                       availSize.ISize(wm), NS_UNCONSTRAINEDSIZE,
                       false, true, kidWritingMode,
                       nsSize(aReflowInput.AvailableWidth(),
                              aReflowInput.AvailableHeight()));
    rs.mLineLayout = &ll;
    ll.SetInFirstLetter(true);
    ll.SetFirstLetterStyleOK(true);

    kid->Reflow(aPresContext, kidMetrics, rs, aReflowStatus);

    ll.EndLineReflow();
    ll.SetInFirstLetter(false);

    // In the floating first-letter case, we need to set this ourselves;
    // nsLineLayout::BeginSpan will set it in the other case
    mBaseline = kidMetrics.BlockStartAscent();

    // Place and size the child and update the output metrics
    LogicalSize convertedSize = kidMetrics.Size(lineWM).ConvertTo(wm, lineWM);
    kid->SetRect(nsRect(bp.IStart(wm), bp.BStart(wm),
                        convertedSize.ISize(wm), convertedSize.BSize(wm)));
    kid->FinishAndStoreOverflow(&kidMetrics);
    kid->DidReflow(aPresContext, nullptr, nsDidReflowStatus::FINISHED);

    convertedSize.ISize(wm) += bp.IStartEnd(wm);
    convertedSize.BSize(wm) += bp.BStartEnd(wm);
    aMetrics.SetSize(wm, convertedSize);
    aMetrics.SetBlockStartAscent(kidMetrics.BlockStartAscent() +
                                 bp.BStart(wm));

    // Ensure that the overflow rect contains the child textframe's
    // overflow rect.
    // Note that if this is floating, the overline/underline drawable
    // area is in the overflow rect of the child textframe.
    aMetrics.UnionOverflowAreasWithDesiredBounds();
    ConsiderChildOverflow(aMetrics.mOverflowAreas, kid);

    FinishAndStoreOverflow(&aMetrics);
  } else {
    // Pretend we are a span and reflow the child frame
    nsLineLayout* ll = aReflowInput.mLineLayout;
    bool          pushedFrame;

    ll->SetInFirstLetter(
      mStyleContext->GetPseudo() == nsCSSPseudoElements::firstLetter);
    ll->BeginSpan(this, &aReflowInput, bp.IStart(wm),
                  availSize.ISize(wm), &mBaseline);
    ll->ReflowFrame(kid, aReflowStatus, &kidMetrics, pushedFrame);
    NS_ASSERTION(lineWM.IsVertical() == wm.IsVertical(),
                 "we're assuming we can mix sizes between lineWM and wm "
                 "since we shouldn't have orthogonal writing modes within "
                 "a line.");
    aMetrics.ISize(lineWM) = ll->EndSpan(this) + bp.IStartEnd(wm);
    ll->SetInFirstLetter(false);

    if (mStyleContext->StyleTextReset()->mInitialLetterSize != 0.0f) {
      aMetrics.SetBlockStartAscent(kidMetrics.BlockStartAscent() +
                                   bp.BStart(wm));
      aMetrics.BSize(lineWM) = kidMetrics.BSize(lineWM) + bp.BStartEnd(wm);
    } else {
      nsLayoutUtils::SetBSizeFromFontMetrics(this, aMetrics, bp, lineWM, wm);
    }
  }

  if (!NS_INLINE_IS_BREAK_BEFORE(aReflowStatus)) {
    // Create a continuation or remove existing continuations based on
    // the reflow completion status.
    if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
      if (aReflowInput.mLineLayout) {
        aReflowInput.mLineLayout->SetFirstLetterStyleOK(false);
      }
      nsIFrame* kidNextInFlow = kid->GetNextInFlow();
      if (kidNextInFlow) {
        // Remove all of the childs next-in-flows
        kidNextInFlow->GetParent()->DeleteNextInFlowChild(kidNextInFlow, true);
      }
    } else {
      // Create a continuation for the child frame if it doesn't already
      // have one.
      if (!IsFloating()) {
        CreateNextInFlow(kid);
        // And then push it to our overflow list
        const nsFrameList& overflow = mFrames.RemoveFramesAfter(kid);
        if (overflow.NotEmpty()) {
          SetOverflowFrames(overflow);
        }
      } else if (!kid->GetNextInFlow()) {
        // For floating first letter frames (if a continuation wasn't already
        // created for us) we need to put the continuation with the rest of the
        // text that the first letter frame was made out of.
        nsIFrame* continuation;
        CreateContinuationForFloatingParent(aPresContext, kid,
                                            &continuation, true);
      }
    }
  }

  NS_FRAME_SET_TRUNCATION(aReflowStatus, aReflowInput, aMetrics);
}
Ejemplo n.º 20
0
void
nsNumberControlFrame::Reflow(nsPresContext* aPresContext,
                             ReflowOutput& aDesiredSize,
                             const ReflowInput& aReflowInput,
                             nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsNumberControlFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  NS_ASSERTION(mOuterWrapper, "Outer wrapper div must exist!");

  NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
               "nsNumberControlFrame should not have continuations; if it does we "
               "need to call RegUnregAccessKey only for the first");

  NS_ASSERTION(!mFrames.FirstChild() ||
               !mFrames.FirstChild()->GetNextSibling(),
               "We expect at most one direct child frame");

  if (mState & NS_FRAME_FIRST_REFLOW) {
    nsFormControlFrame::RegUnRegAccessKey(this, true);
  }

  const WritingMode myWM = aReflowInput.GetWritingMode();

  // The ISize of our content box, which is the available ISize
  // for our anonymous content:
  const nscoord contentBoxISize = aReflowInput.ComputedISize();
  nscoord contentBoxBSize = aReflowInput.ComputedBSize();

  // Figure out our border-box sizes as well (by adding borderPadding to
  // content-box sizes):
  const nscoord borderBoxISize = contentBoxISize +
    aReflowInput.ComputedLogicalBorderPadding().IStartEnd(myWM);

  nscoord borderBoxBSize;
  if (contentBoxBSize != NS_INTRINSICSIZE) {
    borderBoxBSize = contentBoxBSize +
      aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
  } // else, we'll figure out borderBoxBSize after we resolve contentBoxBSize.

  nsIFrame* outerWrapperFrame = mOuterWrapper->GetPrimaryFrame();

  if (!outerWrapperFrame) { // display:none?
    if (contentBoxBSize == NS_INTRINSICSIZE) {
      contentBoxBSize = 0;
      borderBoxBSize =
        aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
    }
  } else {
    NS_ASSERTION(outerWrapperFrame == mFrames.FirstChild(), "huh?");

    ReflowOutput wrappersDesiredSize(aReflowInput);

    WritingMode wrapperWM = outerWrapperFrame->GetWritingMode();
    LogicalSize availSize = aReflowInput.ComputedSize(wrapperWM);
    availSize.BSize(wrapperWM) = NS_UNCONSTRAINEDSIZE;

    ReflowInput wrapperReflowInput(aPresContext, aReflowInput,
                                         outerWrapperFrame, availSize);

    // Convert wrapper margin into my own writing-mode (in case it differs):
    LogicalMargin wrapperMargin =
      wrapperReflowInput.ComputedLogicalMargin().ConvertTo(myWM, wrapperWM);

    // offsets of wrapper frame within this frame:
    LogicalPoint
      wrapperOffset(myWM,
                    aReflowInput.ComputedLogicalBorderPadding().IStart(myWM) +
                    wrapperMargin.IStart(myWM),
                    aReflowInput.ComputedLogicalBorderPadding().BStart(myWM) +
                    wrapperMargin.BStart(myWM));

    nsReflowStatus childStatus;
    // We initially reflow the child with a dummy containerSize; positioning
    // will be fixed later.
    const nsSize dummyContainerSize;
    ReflowChild(outerWrapperFrame, aPresContext, wrappersDesiredSize,
                wrapperReflowInput, myWM, wrapperOffset, dummyContainerSize, 0,
                childStatus);
    MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(childStatus),
               "We gave our child unconstrained available block-size, "
               "so it should be complete");

    nscoord wrappersMarginBoxBSize =
      wrappersDesiredSize.BSize(myWM) + wrapperMargin.BStartEnd(myWM);

    if (contentBoxBSize == NS_INTRINSICSIZE) {
      // We are intrinsically sized -- we should shrinkwrap the outer wrapper's
      // block-size:
      contentBoxBSize = wrappersMarginBoxBSize;

      // Make sure we obey min/max-bsize in the case when we're doing intrinsic
      // sizing (we get it for free when we have a non-intrinsic
      // aReflowInput.ComputedBSize()).  Note that we do this before
      // adjusting for borderpadding, since ComputedMaxBSize and
      // ComputedMinBSize are content heights.
      contentBoxBSize =
        NS_CSS_MINMAX(contentBoxBSize,
                      aReflowInput.ComputedMinBSize(),
                      aReflowInput.ComputedMaxBSize());

      borderBoxBSize = contentBoxBSize +
        aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
    }

    // Center child in block axis
    nscoord extraSpace = contentBoxBSize - wrappersMarginBoxBSize;
    wrapperOffset.B(myWM) += std::max(0, extraSpace / 2);

    // Needed in FinishReflowChild, for logical-to-physical conversion:
    nsSize borderBoxSize = LogicalSize(myWM, borderBoxISize, borderBoxBSize).
                           GetPhysicalSize(myWM);

    // Place the child
    FinishReflowChild(outerWrapperFrame, aPresContext, wrappersDesiredSize,
                      &wrapperReflowInput, myWM, wrapperOffset,
                      borderBoxSize, 0);

    nsSize contentBoxSize =
      LogicalSize(myWM, contentBoxISize, contentBoxBSize).
        GetPhysicalSize(myWM);
    aDesiredSize.SetBlockStartAscent(
       wrappersDesiredSize.BlockStartAscent() +
       outerWrapperFrame->BStart(aReflowInput.GetWritingMode(),
                                 contentBoxSize));
  }

  LogicalSize logicalDesiredSize(myWM, borderBoxISize, borderBoxBSize);
  aDesiredSize.SetSize(myWM, logicalDesiredSize);

  aDesiredSize.SetOverflowAreasToDesiredBounds();

  if (outerWrapperFrame) {
    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, outerWrapperFrame);
  }

  FinishAndStoreOverflow(&aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
void
nsHTMLButtonControlFrame::ReflowButtonContents(nsPresContext* aPresContext,
                                               ReflowOutput& aButtonDesiredSize,
                                               const ReflowInput& aButtonReflowInput,
                                               nsIFrame* aFirstKid)
{
  WritingMode wm = GetWritingMode();
  LogicalSize availSize = aButtonReflowInput.ComputedSize(wm);
  availSize.BSize(wm) = NS_INTRINSICSIZE;

  // Buttons have some bonus renderer-determined border/padding,
  // which occupies part of the button's content-box area:
  LogicalMargin focusPadding =
    LogicalMargin(wm, mRenderer.GetAddedButtonBorderAndPadding());

  // See whether out availSize's inline-size is big enough.  If it's
  // smaller than our intrinsic min iSize, that means that the kid
  // wouldn't really fit.  In that case, we overflow into our internal
  // focuspadding (which other browsers don't have) so that there's a
  // little more space for it.
  // Note that GetMinISize includes the focusPadding.
  nscoord IOverflow = GetMinISize(aButtonReflowInput.mRenderingContext) -
                      aButtonReflowInput.ComputedISize();
  nscoord IFocusPadding = focusPadding.IStartEnd(wm);
  nscoord focusPaddingReduction = std::min(IFocusPadding,
                                           std::max(IOverflow, 0));
  if (focusPaddingReduction > 0) {
    nscoord startReduction = focusPadding.IStart(wm);
    if (focusPaddingReduction != IFocusPadding) {
      startReduction = NSToCoordRound(startReduction *
                                      (float(focusPaddingReduction) /
                                       float(IFocusPadding)));
    }
    focusPadding.IStart(wm) -= startReduction;
    focusPadding.IEnd(wm) -= focusPaddingReduction - startReduction;
  }

  // shorthand for a value we need to use in a bunch of places
  const LogicalMargin& clbp = aButtonReflowInput.ComputedLogicalBorderPadding();

  // Indent the child inside us by the focus border. We must do this separate
  // from the regular border.
  availSize.ISize(wm) -= focusPadding.IStartEnd(wm);

  LogicalPoint childPos(wm);
  childPos.I(wm) = focusPadding.IStart(wm) + clbp.IStart(wm);
  availSize.ISize(wm) = std::max(availSize.ISize(wm), 0);

  // Give child a clone of the button's reflow state, with height/width reduced
  // by focusPadding, so that descendants with height:100% don't protrude.
  ReflowInput adjustedButtonReflowInput =
    CloneReflowInputWithReducedContentBox(aButtonReflowInput, focusPadding);

  ReflowInput contentsReflowInput(aPresContext,
                                        adjustedButtonReflowInput,
                                        aFirstKid, availSize);

  nsReflowStatus contentsReflowStatus;
  ReflowOutput contentsDesiredSize(aButtonReflowInput);
  childPos.B(wm) = 0; // This will be set properly later, after reflowing the
                      // child to determine its size.

  // We just pass a dummy containerSize here, as the child will be
  // repositioned later by FinishReflowChild.
  nsSize dummyContainerSize;
  ReflowChild(aFirstKid, aPresContext,
              contentsDesiredSize, contentsReflowInput,
              wm, childPos, dummyContainerSize, 0, contentsReflowStatus);
  MOZ_ASSERT(NS_FRAME_IS_COMPLETE(contentsReflowStatus),
             "We gave button-contents frame unconstrained available height, "
             "so it should be complete");

  // Compute the button's content-box size:
  LogicalSize buttonContentBox(wm);
  if (aButtonReflowInput.ComputedBSize() != NS_INTRINSICSIZE) {
    // Button has a fixed block-size -- that's its content-box bSize.
    buttonContentBox.BSize(wm) = aButtonReflowInput.ComputedBSize();
  } else {
    // Button is intrinsically sized -- it should shrinkwrap the
    // button-contents' bSize, plus any focus-padding space:
    buttonContentBox.BSize(wm) =
      contentsDesiredSize.BSize(wm) + focusPadding.BStartEnd(wm);

    // Make sure we obey min/max-bSize in the case when we're doing intrinsic
    // sizing (we get it for free when we have a non-intrinsic
    // aButtonReflowInput.ComputedBSize()).  Note that we do this before
    // adjusting for borderpadding, since mComputedMaxBSize and
    // mComputedMinBSize are content bSizes.
    buttonContentBox.BSize(wm) =
      NS_CSS_MINMAX(buttonContentBox.BSize(wm),
                    aButtonReflowInput.ComputedMinBSize(),
                    aButtonReflowInput.ComputedMaxBSize());
  }
  if (aButtonReflowInput.ComputedISize() != NS_INTRINSICSIZE) {
    buttonContentBox.ISize(wm) = aButtonReflowInput.ComputedISize();
  } else {
    buttonContentBox.ISize(wm) =
      contentsDesiredSize.ISize(wm) + focusPadding.IStartEnd(wm);
    buttonContentBox.ISize(wm) =
      NS_CSS_MINMAX(buttonContentBox.ISize(wm),
                    aButtonReflowInput.ComputedMinISize(),
                    aButtonReflowInput.ComputedMaxISize());
  }

  // Center child in the block-direction in the button
  // (technically, inside of the button's focus-padding area)
  nscoord extraSpace =
    buttonContentBox.BSize(wm) - focusPadding.BStartEnd(wm) -
    contentsDesiredSize.BSize(wm);

  childPos.B(wm) = std::max(0, extraSpace / 2);

  // Adjust childPos.B() to be in terms of the button's frame-rect, instead of
  // its focus-padding rect:
  childPos.B(wm) += focusPadding.BStart(wm) + clbp.BStart(wm);

  nsSize containerSize =
    (buttonContentBox + clbp.Size(wm)).GetPhysicalSize(wm);

  // Place the child
  FinishReflowChild(aFirstKid, aPresContext,
                    contentsDesiredSize, &contentsReflowInput,
                    wm, childPos, containerSize, 0);

  // Make sure we have a useful 'ascent' value for the child
  if (contentsDesiredSize.BlockStartAscent() ==
      ReflowOutput::ASK_FOR_BASELINE) {
    WritingMode wm = aButtonReflowInput.GetWritingMode();
    contentsDesiredSize.SetBlockStartAscent(aFirstKid->GetLogicalBaseline(wm));
  }

  // OK, we're done with the child frame.
  // Use what we learned to populate the button frame's reflow metrics.
  //  * Button's height & width are content-box size + border-box contribution:
  aButtonDesiredSize.SetSize(wm,
    LogicalSize(wm, aButtonReflowInput.ComputedISize() + clbp.IStartEnd(wm),
                    buttonContentBox.BSize(wm) + clbp.BStartEnd(wm)));

  //  * Button's ascent is its child's ascent, plus the child's block-offset
  // within our frame... unless it's orthogonal, in which case we'll use the
  // contents inline-size as an approximation for now.
  // XXX is there a better strategy? should we include border-padding?
  if (aButtonDesiredSize.GetWritingMode().IsOrthogonalTo(wm)) {
    aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.ISize(wm));
  } else {
    aButtonDesiredSize.SetBlockStartAscent(contentsDesiredSize.BlockStartAscent() +
                                           childPos.B(wm));
  }

  aButtonDesiredSize.SetOverflowAreasToDesiredBounds();
}
void
nsTableWrapperFrame::Reflow(nsPresContext*           aPresContext,
                            ReflowOutput&     aDesiredSize,
                            const ReflowInput& aOuterRI,
                            nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsTableWrapperFrame");
  DISPLAY_REFLOW(aPresContext, this, aOuterRI, aDesiredSize, aStatus);

  // Initialize out parameters
  aDesiredSize.ClearSize();
  aStatus = NS_FRAME_COMPLETE;

  if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
    // Set up our kids.  They're already present, on an overflow list,
    // or there are none so we'll create them now
    MoveOverflowToChildList();
  }

  Maybe<ReflowInput> captionRI;
  Maybe<ReflowInput> innerRI;

  nsRect origInnerRect = InnerTableFrame()->GetRect();
  nsRect origInnerVisualOverflow = InnerTableFrame()->GetVisualOverflowRect();
  bool innerFirstReflow =
    InnerTableFrame()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
  nsRect origCaptionRect;
  nsRect origCaptionVisualOverflow;
  bool captionFirstReflow = false;
  if (mCaptionFrames.NotEmpty()) {
    origCaptionRect = mCaptionFrames.FirstChild()->GetRect();
    origCaptionVisualOverflow =
      mCaptionFrames.FirstChild()->GetVisualOverflowRect();
    captionFirstReflow =
      mCaptionFrames.FirstChild()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
  }
  
  // ComputeAutoSize has to match this logic.
  WritingMode wm = aOuterRI.GetWritingMode();
  uint8_t captionSide = GetCaptionSide();
  WritingMode captionWM = wm; // will be changed below if necessary

  if (captionSide == NO_SIDE) {
    // We don't have a caption.
    OuterBeginReflowChild(aPresContext, InnerTableFrame(), aOuterRI,
                          innerRI, aOuterRI.ComputedSize(wm).ISize(wm));
  } else if (captionSide == NS_STYLE_CAPTION_SIDE_LEFT ||
             captionSide == NS_STYLE_CAPTION_SIDE_RIGHT) {
    // ComputeAutoSize takes care of making side captions small. Compute
    // the caption's size first, and tell the table to fit in what's left.
    OuterBeginReflowChild(aPresContext, mCaptionFrames.FirstChild(), aOuterRI,
                          captionRI, aOuterRI.ComputedSize(wm).ISize(wm));
    captionWM = captionRI->GetWritingMode();
    nscoord innerAvailISize = aOuterRI.ComputedSize(wm).ISize(wm) -
      captionRI->ComputedSizeWithMarginBorderPadding(wm).ISize(wm);
    OuterBeginReflowChild(aPresContext, InnerTableFrame(), aOuterRI,
                          innerRI, innerAvailISize);
  } else if (captionSide == NS_STYLE_CAPTION_SIDE_TOP ||
             captionSide == NS_STYLE_CAPTION_SIDE_BOTTOM) {
    // Compute the table's size first, and then prevent the caption from
    // being larger in the inline dir unless it has to be.
    //
    // Note that CSS 2.1 (but not 2.0) says:
    //   The width of the anonymous box is the border-edge width of the
    //   table box inside it
    // We don't actually make our anonymous box that isize (if we did,
    // it would break 'auto' margins), but this effectively does that.
    OuterBeginReflowChild(aPresContext, InnerTableFrame(), aOuterRI,
                          innerRI, aOuterRI.ComputedSize(wm).ISize(wm));
    // It's good that CSS 2.1 says not to include margins, since we
    // can't, since they already been converted so they exactly
    // fill the available isize (ignoring the margin on one side if
    // neither are auto).  (We take advantage of that later when we call
    // GetCaptionOrigin, though.)
    nscoord innerBorderISize =
      innerRI->ComputedSizeWithBorderPadding(wm).ISize(wm);
    OuterBeginReflowChild(aPresContext, mCaptionFrames.FirstChild(), aOuterRI,
                          captionRI, innerBorderISize);
    captionWM = captionRI->GetWritingMode();
  } else {
    NS_ASSERTION(captionSide == NS_STYLE_CAPTION_SIDE_TOP_OUTSIDE ||
                 captionSide == NS_STYLE_CAPTION_SIDE_BOTTOM_OUTSIDE,
                 "unexpected caption-side");
    // Size the table and the caption independently.
    captionWM = mCaptionFrames.FirstChild()->GetWritingMode();
    OuterBeginReflowChild(aPresContext, mCaptionFrames.FirstChild(),
                          aOuterRI, captionRI,
                          aOuterRI.ComputedSize(captionWM).ISize(captionWM));
    OuterBeginReflowChild(aPresContext, InnerTableFrame(), aOuterRI,
                          innerRI, aOuterRI.ComputedSize(wm).ISize(wm));
  }

  // First reflow the caption.
  Maybe<ReflowOutput> captionMet;
  LogicalSize captionSize(wm);
  LogicalMargin captionMargin(wm);
  if (mCaptionFrames.NotEmpty()) {
    captionMet.emplace(wm);
    nsReflowStatus capStatus; // don't let the caption cause incomplete
    OuterDoReflowChild(aPresContext, mCaptionFrames.FirstChild(),
                       *captionRI, *captionMet, capStatus);
    captionSize.ISize(wm) = captionMet->ISize(wm);
    captionSize.BSize(wm) = captionMet->BSize(wm);
    captionMargin =
      captionRI->ComputedLogicalMargin().ConvertTo(wm, captionWM);
    // Now that we know the bsize of the caption, reduce the available bsize
    // for the table frame if we are bsize constrained and the caption is above
    // or below the inner table.  Also reduce the CB size that we store for
    // our children in case we're a grid item, by the same amount.
    LogicalSize* cbSize = Properties().Get(GridItemCBSizeProperty());
    if (NS_UNCONSTRAINEDSIZE != aOuterRI.AvailableBSize() || cbSize) {
      nscoord captionBSize = 0;
      nscoord captionISize = 0;
      switch (captionSide) {
        case NS_STYLE_CAPTION_SIDE_TOP:
        case NS_STYLE_CAPTION_SIDE_BOTTOM:
        case NS_STYLE_CAPTION_SIDE_TOP_OUTSIDE:
        case NS_STYLE_CAPTION_SIDE_BOTTOM_OUTSIDE:
          captionBSize = captionSize.BSize(wm) + captionMargin.BStartEnd(wm);
          break;
        case NS_STYLE_CAPTION_SIDE_LEFT:
        case NS_STYLE_CAPTION_SIDE_RIGHT:
          captionISize = captionSize.ISize(wm) + captionMargin.IStartEnd(wm);
          break;
      }
      if (NS_UNCONSTRAINEDSIZE != aOuterRI.AvailableBSize()) {
        innerRI->AvailableBSize() =
          std::max(0, innerRI->AvailableBSize() - captionBSize);
      }
      if (cbSize) {
        // Shrink the CB size by the size reserved for the caption.
        LogicalSize oldCBSize = *cbSize;
        cbSize->ISize(wm) = std::max(0, cbSize->ISize(wm) - captionISize);
        cbSize->BSize(wm) = std::max(0, cbSize->BSize(wm) - captionBSize);
        if (oldCBSize != *cbSize) {
          // Reset the inner table's ReflowInput to stretch it to the new size.
          innerRI.reset();
          OuterBeginReflowChild(aPresContext, InnerTableFrame(), aOuterRI,
                                innerRI, aOuterRI.ComputedSize(wm).ISize(wm));
        }
      }
    }
  }

  // Then, now that we know how much to reduce the isize of the inner
  // table to account for side captions, reflow the inner table.
  ReflowOutput innerMet(innerRI->GetWritingMode());
  OuterDoReflowChild(aPresContext, InnerTableFrame(), *innerRI,
                     innerMet, aStatus);
  LogicalSize innerSize(wm, innerMet.ISize(wm), innerMet.BSize(wm));
  LogicalMargin innerMargin = innerRI->ComputedLogicalMargin();

  LogicalSize containSize(wm, GetContainingBlockSize(aOuterRI));

  // Now that we've reflowed both we can place them.
  // XXXldb Most of the input variables here are now uninitialized!

  // XXX Need to recompute inner table's auto margins for the case of side
  // captions.  (Caption's are broken too, but that should be fixed earlier.)

  // Compute the desiredSize so that we can use it as the containerSize
  // for the FinishReflowChild calls below.
  LogicalSize desiredSize(wm);
  SetDesiredSize(captionSide, innerSize, captionSize,
                 innerMargin, captionMargin,
                 desiredSize.ISize(wm), desiredSize.BSize(wm), wm);
  aDesiredSize.SetSize(wm, desiredSize);
  nsSize containerSize = aDesiredSize.PhysicalSize();
  // XXX It's possible for this to be NS_UNCONSTRAINEDSIZE, which will result
  // in assertions from FinishReflowChild.

  if (mCaptionFrames.NotEmpty()) {
    LogicalPoint captionOrigin(wm);
    GetCaptionOrigin(captionSide, containSize, innerSize, innerMargin,
                     captionSize, captionMargin, captionOrigin, wm);
    FinishReflowChild(mCaptionFrames.FirstChild(), aPresContext, *captionMet,
                      captionRI.ptr(), wm, captionOrigin, containerSize, 0);
    captionRI.reset();
  }
  // XXX If the bsize is constrained then we need to check whether
  // everything still fits...

  LogicalPoint innerOrigin(wm);
  GetInnerOrigin(captionSide, containSize, captionSize, captionMargin,
                 innerSize, innerMargin, innerOrigin, wm);
  FinishReflowChild(InnerTableFrame(), aPresContext, innerMet, innerRI.ptr(),
                    wm, innerOrigin, containerSize, 0);
  innerRI.reset();

  nsTableFrame::InvalidateTableFrame(InnerTableFrame(), origInnerRect,
                                     origInnerVisualOverflow,
                                     innerFirstReflow);
  if (mCaptionFrames.NotEmpty()) {
    nsTableFrame::InvalidateTableFrame(mCaptionFrames.FirstChild(),
                                       origCaptionRect,
                                       origCaptionVisualOverflow,
                                       captionFirstReflow);
  }

  UpdateOverflowAreas(aDesiredSize);

  if (GetPrevInFlow()) {
    ReflowOverflowContainerChildren(aPresContext, aOuterRI,
                                    aDesiredSize.mOverflowAreas, 0,
                                    aStatus);
  }

  FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aOuterRI, aStatus);

  // Return our desired rect

  NS_FRAME_SET_TRUNCATION(aStatus, aOuterRI, aDesiredSize);
}
Ejemplo n.º 23
0
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);
      }

      FinishReflowChild(child, aPresContext,
                        kidDesiredSize, &kidReflowInput,
                        borderPadding.left, borderPadding.top, 0);
    }

    if (child->GetContent() == mVideoControls && child->GetSize() != oldChildSize) {
      RefPtr<Runnable> event = new DispatchResizeToControls(child->GetContent());
      nsContentUtils::AddScriptRunner(event);
    }
  }

  if (isBSizeShrinkWrapping) {
    if (contentBoxBSize == NS_INTRINSICSIZE) {
      // We didn't get a BSize from our intrinsic size/ratio, nor did we
      // get one from our controls. Just use BSize of 0.
      contentBoxBSize = 0;
    }
    contentBoxBSize = NS_CSS_MINMAX(contentBoxBSize,
                                    aReflowInput.ComputedMinBSize(),
                                    aReflowInput.ComputedMaxBSize());
    borderBoxBSize = contentBoxBSize +
      aReflowInput.ComputedLogicalBorderPadding().BStartEnd(myWM);
  }

  LogicalSize logicalDesiredSize(myWM, borderBoxISize, borderBoxBSize);
  aMetrics.SetSize(myWM, logicalDesiredSize);

  aMetrics.SetOverflowAreasToDesiredBounds();

  FinishAndStoreOverflow(&aMetrics);

  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                 ("exit nsVideoFrame::Reflow: size=%d,%d",
                  aMetrics.Width(), aMetrics.Height()));
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aMetrics);
}
Ejemplo n.º 24
0
BlockReflowInput::BlockReflowInput(const ReflowInput& aReflowInput,
                                       nsPresContext* aPresContext,
                                       nsBlockFrame* aFrame,
                                       bool aBStartMarginRoot,
                                       bool aBEndMarginRoot,
                                       bool aBlockNeedsFloatManager,
                                       nscoord aConsumedBSize)
  : mBlock(aFrame),
    mPresContext(aPresContext),
    mReflowInput(aReflowInput),
    mContentArea(aReflowInput.GetWritingMode()),
    mPushedFloats(nullptr),
    mOverflowTracker(nullptr),
    mBorderPadding(mReflowInput.ComputedLogicalBorderPadding()),
    mPrevBEndMargin(),
    mLineNumber(0),
    mFloatBreakType(StyleClear::None),
    mConsumedBSize(aConsumedBSize)
{
  if (!sFloatFragmentsInsideColumnPrefCached) {
    sFloatFragmentsInsideColumnPrefCached = true;
    Preferences::AddBoolVarCache(&sFloatFragmentsInsideColumnEnabled,
                                 "layout.float-fragments-inside-column.enabled");
  }
  mFlags.mFloatFragmentsInsideColumnEnabled = sFloatFragmentsInsideColumnEnabled;

  WritingMode wm = aReflowInput.GetWritingMode();
  mFlags.mIsFirstInflow = !aFrame->GetPrevInFlow();
  mFlags.mIsOverflowContainer = IS_TRUE_OVERFLOW_CONTAINER(aFrame);

  nsIFrame::LogicalSides logicalSkipSides =
    aFrame->GetLogicalSkipSides(&aReflowInput);
  mBorderPadding.ApplySkipSides(logicalSkipSides);

  // Note that mContainerSize is the physical size, needed to
  // convert logical block-coordinates in vertical-rl writing mode
  // (measured from a RHS origin) to physical coordinates within the
  // containing block.
  // If aReflowInput doesn't have a constrained ComputedWidth(), we set
  // mContainerSize.width to zero, which means lines will be positioned
  // (physically) incorrectly; we will fix them up at the end of
  // nsBlockFrame::Reflow, after we know the total block-size of the
  // frame.
  mContainerSize.width = aReflowInput.ComputedWidth();
  if (mContainerSize.width == NS_UNCONSTRAINEDSIZE) {
    mContainerSize.width = 0;
  }

  mContainerSize.width += mBorderPadding.LeftRight(wm);

  // For now at least, we don't do that fix-up for mContainerHeight.
  // It's only used in nsBidiUtils::ReorderFrames for vertical rtl
  // writing modes, which aren't fully supported for the time being.
  mContainerSize.height = aReflowInput.ComputedHeight() +
                          mBorderPadding.TopBottom(wm);

  if ((aBStartMarginRoot && !logicalSkipSides.BStart()) ||
      0 != mBorderPadding.BStart(wm)) {
    mFlags.mIsBStartMarginRoot = true;
    mFlags.mShouldApplyBStartMargin = true;
  }
  if ((aBEndMarginRoot && !logicalSkipSides.BEnd()) ||
      0 != mBorderPadding.BEnd(wm)) {
    mFlags.mIsBEndMarginRoot = true;
  }
  if (aBlockNeedsFloatManager) {
    mFlags.mBlockNeedsFloatManager = true;
  }

  mFloatManager = aReflowInput.mFloatManager;

  NS_ASSERTION(mFloatManager,
               "FloatManager should be set in BlockReflowInput" );
  if (mFloatManager) {
    // Save the coordinate system origin for later.
    mFloatManager->GetTranslation(mFloatManagerI, mFloatManagerB);
    mFloatManager->PushState(&mFloatManagerStateBefore); // never popped
  }

  mReflowStatus = NS_FRAME_COMPLETE;

  mNextInFlow = static_cast<nsBlockFrame*>(mBlock->GetNextInFlow());

  LAYOUT_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedISize(),
                       "have unconstrained width; this should only result "
                       "from very large sizes, not attempts at intrinsic "
                       "width calculation");
  mContentArea.ISize(wm) = aReflowInput.ComputedISize();

  // Compute content area height. Unlike the width, if we have a
  // specified style height we ignore it since extra content is
  // managed by the "overflow" property. When we don't have a
  // specified style height then we may end up limiting our height if
  // the availableHeight is constrained (this situation occurs when we
  // are paginated).
  if (NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableBSize()) {
    // We are in a paginated situation. The bottom edge is just inside
    // the bottom border and padding. The content area height doesn't
    // include either border or padding edge.
    mBEndEdge = aReflowInput.AvailableBSize() - mBorderPadding.BEnd(wm);
    mContentArea.BSize(wm) = std::max(0, mBEndEdge - mBorderPadding.BStart(wm));
  }
  else {
    // When we are not in a paginated situation then we always use
    // a constrained height.
    mFlags.mHasUnconstrainedBSize = true;
    mContentArea.BSize(wm) = mBEndEdge = NS_UNCONSTRAINEDSIZE;
  }
  mContentArea.IStart(wm) = mBorderPadding.IStart(wm);
  mBCoord = mContentArea.BStart(wm) = mBorderPadding.BStart(wm);

  mPrevChild = nullptr;
  mCurrentLine = aFrame->LinesEnd();

  mMinLineHeight = aReflowInput.CalcLineHeight();
}
Ejemplo n.º 25
0
void
ViewportFrame::Reflow(nsPresContext*           aPresContext,
                      ReflowOutput&     aDesiredSize,
                      const ReflowInput& aReflowInput,
                      nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("ViewportFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
  NS_FRAME_TRACE_REFLOW_IN("ViewportFrame::Reflow");

  // Initialize OUT parameters
  aStatus = NS_FRAME_COMPLETE;

  // Because |Reflow| sets ComputedBSize() on the child to our
  // ComputedBSize().
  AddStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE);

  // Set our size up front, since some parts of reflow depend on it
  // being already set.  Note that the computed height may be
  // unconstrained; that's ok.  Consumers should watch out for that.
  SetSize(nsSize(aReflowInput.ComputedWidth(), aReflowInput.ComputedHeight()));

  // Reflow the main content first so that the placeholders of the
  // fixed-position frames will be in the right places on an initial
  // reflow.
  nscoord kidBSize = 0;
  WritingMode wm = aReflowInput.GetWritingMode();

  if (mFrames.NotEmpty()) {
    // Deal with a non-incremental reflow or an incremental reflow
    // targeted at our one-and-only principal child frame.
    if (aReflowInput.ShouldReflowAllKids() ||
        aReflowInput.IsBResize() ||
        NS_SUBTREE_DIRTY(mFrames.FirstChild())) {
      // Reflow our one-and-only principal child frame
      nsIFrame*           kidFrame = mFrames.FirstChild();
      ReflowOutput kidDesiredSize(aReflowInput);
      WritingMode         wm = kidFrame->GetWritingMode();
      LogicalSize         availableSpace = aReflowInput.AvailableSize(wm);
      ReflowInput   kidReflowInput(aPresContext, aReflowInput,
                                         kidFrame, availableSpace);

      // Reflow the frame
      kidReflowInput.SetComputedBSize(aReflowInput.ComputedBSize());
      ReflowChild(kidFrame, aPresContext, kidDesiredSize, kidReflowInput,
                  0, 0, 0, aStatus);
      kidBSize = kidDesiredSize.BSize(wm);

      FinishReflowChild(kidFrame, aPresContext, kidDesiredSize, nullptr, 0, 0, 0);
    } else {
      kidBSize = LogicalSize(wm, mFrames.FirstChild()->GetSize()).BSize(wm);
    }
  }

  NS_ASSERTION(aReflowInput.AvailableISize() != NS_UNCONSTRAINEDSIZE,
               "shouldn't happen anymore");

  // Return the max size as our desired size
  LogicalSize maxSize(wm, aReflowInput.AvailableISize(),
                      // Being flowed initially at an unconstrained block size
                      // means we should return our child's intrinsic size.
                      aReflowInput.ComputedBSize() != NS_UNCONSTRAINEDSIZE
                        ? aReflowInput.ComputedBSize()
                        : kidBSize);
  aDesiredSize.SetSize(wm, maxSize);
  aDesiredSize.SetOverflowAreasToDesiredBounds();

  if (HasAbsolutelyPositionedChildren()) {
    // Make a copy of the reflow state and change the computed width and height
    // to reflect the available space for the fixed items
    ReflowInput reflowInput(aReflowInput);

    if (reflowInput.AvailableBSize() == NS_UNCONSTRAINEDSIZE) {
      // We have an intrinsic-height document with abs-pos/fixed-pos children.
      // Set the available height and mComputedHeight to our chosen height.
      reflowInput.AvailableBSize() = maxSize.BSize(wm);
      // Not having border/padding simplifies things
      NS_ASSERTION(reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0,0,0,0),
                   "Viewports can't have border/padding");
      reflowInput.SetComputedBSize(maxSize.BSize(wm));
    }

    nsRect rect = AdjustReflowInputAsContainingBlock(&reflowInput);
    nsOverflowAreas* overflowAreas = &aDesiredSize.mOverflowAreas;
    nsIScrollableFrame* rootScrollFrame =
                    aPresContext->PresShell()->GetRootScrollFrameAsScrollable();
    if (rootScrollFrame && !rootScrollFrame->IsIgnoringViewportClipping()) {
      overflowAreas = nullptr;
    }
    AbsPosReflowFlags flags =
      AbsPosReflowFlags::eCBWidthAndHeightChanged; // XXX could be optimized
    GetAbsoluteContainingBlock()->Reflow(this, aPresContext, reflowInput, aStatus,
                                         rect, flags, overflowAreas);
  }

  if (mFrames.NotEmpty()) {
    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, mFrames.FirstChild());
  }

  // If we were dirty then do a repaint
  if (GetStateBits() & NS_FRAME_IS_DIRTY) {
    InvalidateFrame();
  }

  // Clipping is handled by the document container (e.g., nsSubDocumentFrame),
  // so we don't need to change our overflow areas.
  bool overflowChanged = FinishAndStoreOverflow(&aDesiredSize);
  if (overflowChanged) {
    // We may need to alert our container to get it to pick up the
    // overflow change.
    nsSubDocumentFrame* container = static_cast<nsSubDocumentFrame*>
      (nsLayoutUtils::GetCrossDocParentFrame(this));
    if (container && !container->ShouldClipSubdocument()) {
      container->PresContext()->PresShell()->
        FrameNeedsReflow(container, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);
    }
  }

  NS_FRAME_TRACE_REFLOW_OUT("ViewportFrame::Reflow", aStatus);
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
Ejemplo n.º 26
0
/* virtual */ void
nsRubyFrame::Reflow(nsPresContext* aPresContext,
                    ReflowOutput& aDesiredSize,
                    const ReflowInput& aReflowInput,
                    nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsRubyFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");

  if (!aReflowInput.mLineLayout) {
    NS_ASSERTION(aReflowInput.mLineLayout,
                 "No line layout provided to RubyFrame reflow method.");
    return;
  }

  // Grab overflow frames from prev-in-flow and its own.
  MoveInlineOverflowToChildList(
    aReflowInput.mLineLayout->LineContainerFrame());

  // Clear leadings
  mLeadings.Reset();

  // Since the ruby base container is going to reflow not only the ruby
  // base frames, but also the ruby text frames, and then *afterwards*
  // we're going to reflow the ruby text containers (which do not reflow
  // their children), we need to transfer NS_FRAME_IS_DIRTY status from
  // the ruby text containers to their child ruby texts now, both so
  // that the ruby texts are marked dirty if needed, and so that the
  // ruby text container doesn't mark the ruby text frames dirty *after*
  // they're reflowed and leave dirty bits in a clean tree (suppressing
  // future reflows, due to lack of a queued reflow to clean them).
  for (nsIFrame* child : PrincipalChildList()) {
    if (child->HasAnyStateBits(NS_FRAME_IS_DIRTY) &&
        child->IsRubyTextContainerFrame()) {
      for (nsIFrame* grandchild : child->PrincipalChildList()) {
        grandchild->AddStateBits(NS_FRAME_IS_DIRTY);
      }
      // Replace NS_FRAME_IS_DIRTY with NS_FRAME_HAS_DIRTY_CHILDREN so
      // we still have a dirty marking, but one that we won't transfer
      // to children again.
      child->RemoveStateBits(NS_FRAME_IS_DIRTY);
      child->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
    }
  }

  // Begin the span for the ruby frame
  WritingMode frameWM = aReflowInput.GetWritingMode();
  WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
  LogicalMargin borderPadding = aReflowInput.ComputedLogicalBorderPadding();
  nscoord startEdge = 0;
  const bool boxDecorationBreakClone =
    StyleBorder()->mBoxDecorationBreak == StyleBoxDecorationBreak::Clone;
  if (boxDecorationBreakClone || !GetPrevContinuation()) {
    startEdge = borderPadding.IStart(frameWM);
  }
  NS_ASSERTION(aReflowInput.AvailableISize() != NS_UNCONSTRAINEDSIZE,
               "should no longer use available widths");
  nscoord availableISize = aReflowInput.AvailableISize();
  availableISize -= startEdge + borderPadding.IEnd(frameWM);
  aReflowInput.mLineLayout->BeginSpan(this, &aReflowInput,
                                      startEdge, availableISize, &mBaseline);

  for (RubySegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
    ReflowSegment(aPresContext, aReflowInput, e.GetBaseContainer(), aStatus);

    if (aStatus.IsInlineBreak()) {
      // A break occurs when reflowing the segment.
      // Don't continue reflowing more segments.
      break;
    }
  }

  ContinuationTraversingState pullState(this);
  while (aStatus.IsEmpty()) {
    nsRubyBaseContainerFrame* baseContainer =
      PullOneSegment(aReflowInput.mLineLayout, pullState);
    if (!baseContainer) {
      // No more continuations after, finish now.
      break;
    }
    ReflowSegment(aPresContext, aReflowInput, baseContainer, aStatus);
  }
  // We never handle overflow in ruby.
  MOZ_ASSERT(!aStatus.IsOverflowIncomplete());

  aDesiredSize.ISize(lineWM) = aReflowInput.mLineLayout->EndSpan(this);
  if (boxDecorationBreakClone || !GetPrevContinuation()) {
    aDesiredSize.ISize(lineWM) += borderPadding.IStart(frameWM);
  }
  if (boxDecorationBreakClone || aStatus.IsComplete()) {
    aDesiredSize.ISize(lineWM) += borderPadding.IEnd(frameWM);
  }

  // Update descendant leadings of ancestor ruby base container.
  if (nsRubyBaseContainerFrame* rbc = FindRubyBaseContainerAncestor(this)) {
    rbc->UpdateDescendantLeadings(mLeadings);
  }

  nsLayoutUtils::SetBSizeFromFontMetrics(this, aDesiredSize,
                                         borderPadding, lineWM, frameWM);
}
Ejemplo n.º 27
0
void
nsInlineFrame::ReflowFrames(nsPresContext* aPresContext,
                            const ReflowInput& aReflowInput,
                            InlineReflowInput& irs,
                            ReflowOutput& aMetrics,
                            nsReflowStatus& aStatus)
{
  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");

  nsLineLayout* lineLayout = aReflowInput.mLineLayout;
  bool inFirstLine = aReflowInput.mLineLayout->GetInFirstLine();
  RestyleManager* restyleManager = aPresContext->RestyleManager();
  WritingMode frameWM = aReflowInput.GetWritingMode();
  WritingMode lineWM = aReflowInput.mLineLayout->mRootSpan->mWritingMode;
  LogicalMargin framePadding = aReflowInput.ComputedLogicalBorderPadding();
  nscoord startEdge = 0;
  const bool boxDecorationBreakClone =
    MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
                   StyleBoxDecorationBreak::Clone);
  // Don't offset by our start borderpadding if we have a prev continuation or
  // if we're in a part of an {ib} split other than the first one. For
  // box-decoration-break:clone we always offset our start since all
  // continuations have border/padding.
  if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
      boxDecorationBreakClone) {
    startEdge = framePadding.IStart(frameWM);
  }
  nscoord availableISize = aReflowInput.AvailableISize();
  NS_ASSERTION(availableISize != NS_UNCONSTRAINEDSIZE,
               "should no longer use available widths");
  // Subtract off inline axis border+padding from availableISize
  availableISize -= startEdge;
  availableISize -= framePadding.IEnd(frameWM);
  lineLayout->BeginSpan(this, &aReflowInput, startEdge,
                        startEdge + availableISize, &mBaseline);

  // First reflow our principal children.
  nsIFrame* frame = mFrames.FirstChild();
  bool done = false;
  while (frame) {
    // Check if we should lazily set the child frame's parent pointer.
    if (irs.mSetParentPointer) {
      nsIFrame* child = frame;
      do {
        child->SetParent(this);
        if (inFirstLine) {
          restyleManager->ReparentStyleContext(child);
          nsLayoutUtils::MarkDescendantsDirty(child);
        }
        // We also need to do the same for |frame|'s next-in-flows that are in
        // the sibling list. Otherwise, if we reflow |frame| and it's complete
        // we'll crash when trying to delete its next-in-flow.
        // This scenario doesn't happen often, but it can happen.
        nsIFrame* nextSibling = child->GetNextSibling();
        child = child->GetNextInFlow();
        if (MOZ_UNLIKELY(child)) {
          while (child != nextSibling && nextSibling) {
            nextSibling = nextSibling->GetNextSibling();
          }
          if (!nextSibling) {
            child = nullptr;
          }
        }
        MOZ_ASSERT(!child || mFrames.ContainsFrame(child));
      } while (child);

      // Fix the parent pointer for ::first-letter child frame next-in-flows,
      // so nsFirstLetterFrame::Reflow can destroy them safely (bug 401042).
      nsIFrame* realFrame = nsPlaceholderFrame::GetRealFrameFor(frame);
      if (realFrame->IsLetterFrame()) {
        nsIFrame* child = realFrame->PrincipalChildList().FirstChild();
        if (child) {
          NS_ASSERTION(child->IsTextFrame(), "unexpected frame type");
          nsIFrame* nextInFlow = child->GetNextInFlow();
          for ( ; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
            NS_ASSERTION(nextInFlow->IsTextFrame(), "unexpected frame type");
            if (mFrames.ContainsFrame(nextInFlow)) {
              nextInFlow->SetParent(this);
              if (inFirstLine) {
                restyleManager->ReparentStyleContext(nextInFlow);
                nsLayoutUtils::MarkDescendantsDirty(nextInFlow);
              }
            }
            else {
#ifdef DEBUG
              // Once we find a next-in-flow that isn't ours none of the
              // remaining next-in-flows should be either.
              for ( ; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
                NS_ASSERTION(!mFrames.ContainsFrame(nextInFlow),
                             "unexpected letter frame flow");
              }
#endif
              break;
            }
          }
        }
      }
    }
    MOZ_ASSERT(frame->GetParent() == this);

    if (!done) {
      bool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
      ReflowInlineFrame(aPresContext, aReflowInput, irs, frame, aStatus);
      done = aStatus.IsInlineBreak() ||
             (!reflowingFirstLetter && aStatus.IsIncomplete());
      if (done) {
        if (!irs.mSetParentPointer) {
          break;
        }
        // Keep reparenting the remaining siblings, but don't reflow them.
        nsFrameList* pushedFrames = GetOverflowFrames();
        if (pushedFrames && pushedFrames->FirstChild() == frame) {
          // Don't bother if |frame| was pushed to our overflow list.
          break;
        }
      } else {
        irs.mPrevFrame = frame;
      }
    }
    frame = frame->GetNextSibling();
  }

  // Attempt to pull frames from our next-in-flow until we can't
  if (!done && GetNextInFlow()) {
    while (true) {
      bool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
      bool isComplete;
      if (!frame) { // Could be non-null if we pulled a first-letter frame and
                    // it created a continuation, since we don't push those.
        frame = PullOneFrame(aPresContext, irs, &isComplete);
      }
#ifdef NOISY_PUSHING
      printf("%p pulled up %p\n", this, frame);
#endif
      if (nullptr == frame) {
        if (!isComplete) {
          aStatus.Reset();
          aStatus.SetIncomplete();
        }
        break;
      }
      ReflowInlineFrame(aPresContext, aReflowInput, irs, frame, aStatus);
      if (aStatus.IsInlineBreak() ||
          (!reflowingFirstLetter && aStatus.IsIncomplete())) {
        break;
      }
      irs.mPrevFrame = frame;
      frame = frame->GetNextSibling();
    }
  }

  NS_ASSERTION(!aStatus.IsComplete() || !GetOverflowFrames(),
               "We can't be complete AND have overflow frames!");

  // If after reflowing our children they take up no area then make
  // sure that we don't either.
  //
  // Note: CSS demands that empty inline elements still affect the
  // line-height calculations. However, continuations of an inline
  // that are empty we force to empty so that things like collapsed
  // whitespace in an inline element don't affect the line-height.
  aMetrics.ISize(lineWM) = lineLayout->EndSpan(this);

  // Compute final width.

  // XXX Note that that the padding start and end are in the frame's
  //     writing mode, but the metrics' inline-size is in the line's
  //     writing mode. This makes sense if the line and frame are both
  //     vertical or both horizontal, but what should happen with
  //     orthogonal inlines?

  // Make sure to not include our start border and padding if we have a prev
  // continuation or if we're in a part of an {ib} split other than the first
  // one.  For box-decoration-break:clone we always include our start border
  // and padding since all continuations have them.
  if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
      boxDecorationBreakClone) {
    aMetrics.ISize(lineWM) += framePadding.IStart(frameWM);
  }

  /*
   * We want to only apply the end border and padding if we're the last
   * continuation and either not in an {ib} split or the last part of it.  To
   * be the last continuation we have to be complete (so that we won't get a
   * next-in-flow) and have no non-fluid continuations on our continuation
   * chain.  For box-decoration-break:clone we always apply the end border and
   * padding since all continuations have them.
   */
  if ((aStatus.IsComplete() &&
       !LastInFlow()->GetNextContinuation() &&
       !FrameIsNonLastInIBSplit()) ||
      boxDecorationBreakClone) {
    aMetrics.ISize(lineWM) += framePadding.IEnd(frameWM);
  }

  nsLayoutUtils::SetBSizeFromFontMetrics(this, aMetrics,
                                         framePadding, lineWM, frameWM);

  // For now our overflow area is zero. The real value will be
  // computed in |nsLineLayout::RelativePositionFrames|.
  aMetrics.mOverflowAreas.Clear();

#ifdef NOISY_FINAL_SIZE
  ListTag(stdout);
  printf(": metrics=%d,%d ascent=%d\n",
         aMetrics.Width(), aMetrics.Height(), aMetrics.TopAscent());
#endif
}
void
nsAbsoluteContainingBlock::ResolveSizeDependentOffsets(
  nsPresContext* aPresContext,
  ReflowInput& aKidReflowInput,
  const LogicalSize& aKidSize,
  const LogicalMargin& aMargin,
  LogicalMargin* aOffsets,
  LogicalSize* aLogicalCBSize)
{
  WritingMode wm = aKidReflowInput.GetWritingMode();
  WritingMode outerWM = aKidReflowInput.mParentReflowInput->GetWritingMode();

  // Now that we know the child's size, we resolve any sentinel values in its
  // IStart/BStart offset coordinates that depend on that size.
  //  * NS_AUTOOFFSET indicates that the child's position in the given axis
  // is determined by its end-wards offset property, combined with its size and
  // available space. e.g.: "top: auto; height: auto; bottom: 50px"
  //  * m{I,B}OffsetsResolvedAfterSize indicate that the child is using its
  // static position in that axis, *and* its static position is determined by
  // the axis-appropriate css-align property (which may require the child's
  // size, e.g. to center it within the parent).
  if ((NS_AUTOOFFSET == aOffsets->IStart(outerWM)) ||
      (NS_AUTOOFFSET == aOffsets->BStart(outerWM)) ||
      aKidReflowInput.mFlags.mIOffsetsNeedCSSAlign ||
      aKidReflowInput.mFlags.mBOffsetsNeedCSSAlign) {
    if (-1 == aLogicalCBSize->ISize(wm)) {
      // Get the containing block width/height
      const ReflowInput* parentRI = aKidReflowInput.mParentReflowInput;
      *aLogicalCBSize =
        aKidReflowInput.ComputeContainingBlockRectangle(aPresContext,
                                                        parentRI);
    }

    const LogicalSize logicalCBSizeOuterWM = aLogicalCBSize->ConvertTo(outerWM,
                                                                       wm);

    // placeholderContainer is used in each of the m{I,B}OffsetsNeedCSSAlign
    // clauses. We declare it at this scope so we can avoid having to look
    // it up twice (and only look it up if it's needed).
    nsContainerFrame* placeholderContainer = nullptr;

    if (NS_AUTOOFFSET == aOffsets->IStart(outerWM)) {
      NS_ASSERTION(NS_AUTOOFFSET != aOffsets->IEnd(outerWM),
                   "Can't solve for both start and end");
      aOffsets->IStart(outerWM) =
        logicalCBSizeOuterWM.ISize(outerWM) -
        aOffsets->IEnd(outerWM) - aMargin.IStartEnd(outerWM) -
        aKidSize.ISize(outerWM);
    } else if (aKidReflowInput.mFlags.mIOffsetsNeedCSSAlign) {
      placeholderContainer = GetPlaceholderContainer(aPresContext,
                                                     aKidReflowInput.mFrame);
      nscoord offset = OffsetToAlignedStaticPos(aKidReflowInput, aKidSize,
                                                placeholderContainer,
                                                outerWM, eLogicalAxisInline);
      // Shift IStart from its current position (at start corner of the
      // alignment container) by the returned offset.  And set IEnd to the
      // distance between the kid's end edge to containing block's end edge.
      aOffsets->IStart(outerWM) += offset;
      aOffsets->IEnd(outerWM) =
        logicalCBSizeOuterWM.ISize(outerWM) -
        (aOffsets->IStart(outerWM) + aKidSize.ISize(outerWM));
    }

    if (NS_AUTOOFFSET == aOffsets->BStart(outerWM)) {
      aOffsets->BStart(outerWM) =
        logicalCBSizeOuterWM.BSize(outerWM) -
        aOffsets->BEnd(outerWM) - aMargin.BStartEnd(outerWM) -
        aKidSize.BSize(outerWM);
    } else if (aKidReflowInput.mFlags.mBOffsetsNeedCSSAlign) {
      if (!placeholderContainer) {
        placeholderContainer = GetPlaceholderContainer(aPresContext,
                                                       aKidReflowInput.mFrame);
      }
      nscoord offset = OffsetToAlignedStaticPos(aKidReflowInput, aKidSize,
                                                placeholderContainer,
                                                outerWM, eLogicalAxisBlock);
      // Shift BStart from its current position (at start corner of the
      // alignment container) by the returned offset.  And set BEnd to the
      // distance between the kid's end edge to containing block's end edge.
      aOffsets->BStart(outerWM) += offset;
      aOffsets->BEnd(outerWM) =
        logicalCBSizeOuterWM.BSize(outerWM) -
        (aOffsets->BStart(outerWM) + aKidSize.BSize(outerWM));
    }
    aKidReflowInput.SetComputedLogicalOffsets(aOffsets->ConvertTo(wm, outerWM));
  }
}
Ejemplo n.º 29
0
/* virtual */ void
nsRubyFrame::Reflow(nsPresContext* aPresContext,
                    ReflowOutput& aDesiredSize,
                    const ReflowInput& aReflowInput,
                    nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsRubyFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
  
  if (!aReflowInput.mLineLayout) {
    NS_ASSERTION(aReflowInput.mLineLayout,
                 "No line layout provided to RubyFrame reflow method.");
    aStatus = NS_FRAME_COMPLETE;
    return;
  }

  // Grab overflow frames from prev-in-flow and its own.
  MoveOverflowToChildList();

  // Clear leadings
  mBStartLeading = mBEndLeading = 0;

  // Begin the span for the ruby frame
  WritingMode frameWM = aReflowInput.GetWritingMode();
  WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
  LogicalMargin borderPadding = aReflowInput.ComputedLogicalBorderPadding();
  nscoord startEdge = 0;
  const bool boxDecorationBreakClone =
    StyleBorder()->mBoxDecorationBreak == StyleBoxDecorationBreak::Clone;
  if (boxDecorationBreakClone || !GetPrevContinuation()) {
    startEdge = borderPadding.IStart(frameWM);
  }
  NS_ASSERTION(aReflowInput.AvailableISize() != NS_UNCONSTRAINEDSIZE,
               "should no longer use available widths");
  nscoord availableISize = aReflowInput.AvailableISize();
  availableISize -= startEdge + borderPadding.IEnd(frameWM);
  aReflowInput.mLineLayout->BeginSpan(this, &aReflowInput,
                                      startEdge, availableISize, &mBaseline);

  aStatus = NS_FRAME_COMPLETE;
  for (RubySegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
    ReflowSegment(aPresContext, aReflowInput, e.GetBaseContainer(), aStatus);

    if (NS_INLINE_IS_BREAK(aStatus)) {
      // A break occurs when reflowing the segment.
      // Don't continue reflowing more segments.
      break;
    }
  }

  ContinuationTraversingState pullState(this);
  while (aStatus == NS_FRAME_COMPLETE) {
    nsRubyBaseContainerFrame* baseContainer =
      PullOneSegment(aReflowInput.mLineLayout, pullState);
    if (!baseContainer) {
      // No more continuations after, finish now.
      break;
    }
    ReflowSegment(aPresContext, aReflowInput, baseContainer, aStatus);
  }
  // We never handle overflow in ruby.
  MOZ_ASSERT(!NS_FRAME_OVERFLOW_IS_INCOMPLETE(aStatus));

  aDesiredSize.ISize(lineWM) = aReflowInput.mLineLayout->EndSpan(this);
  if (boxDecorationBreakClone || !GetPrevContinuation()) {
    aDesiredSize.ISize(lineWM) += borderPadding.IStart(frameWM);
  }
  if (boxDecorationBreakClone || NS_FRAME_IS_COMPLETE(aStatus)) {
    aDesiredSize.ISize(lineWM) += borderPadding.IEnd(frameWM);
  }

  nsLayoutUtils::SetBSizeFromFontMetrics(this, aDesiredSize,
                                         borderPadding, lineWM, frameWM);
}
void
nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame*                aDelegatingFrame,
                                               nsPresContext*           aPresContext,
                                               const ReflowInput& aReflowInput,
                                               const nsRect&            aContainingBlock,
                                               AbsPosReflowFlags        aFlags,
                                               nsIFrame*                aKidFrame,
                                               nsReflowStatus&          aStatus,
                                               nsOverflowAreas*         aOverflowAreas)
{
#ifdef DEBUG
  if (nsBlockFrame::gNoisyReflow) {
    nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
    printf("abs pos ");
    nsAutoString name;
    aKidFrame->GetFrameName(name);
    printf("%s ", NS_LossyConvertUTF16toASCII(name).get());

    char width[16];
    char height[16];
    PrettyUC(aReflowInput.AvailableWidth(), width, 16);
    PrettyUC(aReflowInput.AvailableHeight(), height, 16);
    printf(" a=%s,%s ", width, height);
    PrettyUC(aReflowInput.ComputedWidth(), width, 16);
    PrettyUC(aReflowInput.ComputedHeight(), height, 16);
    printf("c=%s,%s \n", width, height);
  }
  AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
#endif // DEBUG

  WritingMode wm = aKidFrame->GetWritingMode();
  LogicalSize logicalCBSize(wm, aContainingBlock.Size());
  nscoord availISize = logicalCBSize.ISize(wm);
  if (availISize == -1) {
    NS_ASSERTION(aReflowInput.ComputedSize(wm).ISize(wm) !=
                   NS_UNCONSTRAINEDSIZE,
                 "Must have a useful inline-size _somewhere_");
    availISize =
      aReflowInput.ComputedSizeWithPadding(wm).ISize(wm);
  }

  uint32_t rsFlags = 0;
  if (aFlags & AbsPosReflowFlags::eIsGridContainerCB) {
    // When a grid container generates the abs.pos. CB for a *child* then
    // the static-position is the CB origin (i.e. of the grid area rect).
    // https://drafts.csswg.org/css-grid/#static-position
    nsIFrame* placeholder =
      aPresContext->PresShell()->GetPlaceholderFrameFor(aKidFrame);
    if (placeholder && placeholder->GetParent() == aDelegatingFrame) {
      rsFlags |= ReflowInput::STATIC_POS_IS_CB_ORIGIN;
    }
  }
  ReflowInput kidReflowInput(aPresContext, aReflowInput, aKidFrame,
                                   LogicalSize(wm, availISize,
                                               NS_UNCONSTRAINEDSIZE),
                                   &logicalCBSize, rsFlags);

  // Get the border values
  WritingMode outerWM = aReflowInput.GetWritingMode();
  const LogicalMargin border(outerWM,
                             aReflowInput.mStyleBorder->GetComputedBorder());
  LogicalMargin margin =
    kidReflowInput.ComputedLogicalMargin().ConvertTo(outerWM, wm);

  // If we're doing CSS Box Alignment in either axis, that will apply the
  // margin for us in that axis (since the thing that's aligned is the margin
  // box).  So, we clear out the margin here to avoid applying it twice.
  if (kidReflowInput.mFlags.mIOffsetsNeedCSSAlign) {
    margin.IStart(outerWM) = margin.IEnd(outerWM) = 0;
  }
  if (kidReflowInput.mFlags.mBOffsetsNeedCSSAlign) {
    margin.BStart(outerWM) = margin.BEnd(outerWM) = 0;
  }

  bool constrainBSize = (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE)
    && (aFlags & AbsPosReflowFlags::eConstrainHeight)
       // Don't split if told not to (e.g. for fixed frames)
    && (aDelegatingFrame->GetType() != nsGkAtoms::inlineFrame)
       //XXX we don't handle splitting frames for inline absolute containing blocks yet
    && (aKidFrame->GetLogicalRect(aContainingBlock.Size()).BStart(wm) <=
        aReflowInput.AvailableBSize());
       // Don't split things below the fold. (Ideally we shouldn't *have*
       // anything totally below the fold, but we can't position frames
       // across next-in-flow breaks yet.
  if (constrainBSize) {
    kidReflowInput.AvailableBSize() =
      aReflowInput.AvailableBSize() - border.ConvertTo(wm, outerWM).BStart(wm) -
      kidReflowInput.ComputedLogicalMargin().BStart(wm);
    if (NS_AUTOOFFSET != kidReflowInput.ComputedLogicalOffsets().BStart(wm)) {
      kidReflowInput.AvailableBSize() -=
        kidReflowInput.ComputedLogicalOffsets().BStart(wm);
    }
  }

  // Do the reflow
  ReflowOutput kidDesiredSize(kidReflowInput);
  aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowInput, aStatus);

  const LogicalSize kidSize = kidDesiredSize.Size(wm).ConvertTo(outerWM, wm);

  LogicalMargin offsets =
    kidReflowInput.ComputedLogicalOffsets().ConvertTo(outerWM, wm);

  // If we're solving for start in either inline or block direction,
  // then compute it now that we know the dimensions.
  ResolveSizeDependentOffsets(aPresContext, kidReflowInput, kidSize, margin,
                              &offsets, &logicalCBSize);

  // Position the child relative to our padding edge
  LogicalRect rect(outerWM,
                   border.IStart(outerWM) + offsets.IStart(outerWM) +
                     margin.IStart(outerWM),
                   border.BStart(outerWM) + offsets.BStart(outerWM) +
                     margin.BStart(outerWM),
                   kidSize.ISize(outerWM), kidSize.BSize(outerWM));
  nsRect r =
    rect.GetPhysicalRect(outerWM, logicalCBSize.GetPhysicalSize(wm) +
                         border.Size(outerWM).GetPhysicalSize(outerWM));

  // Offset the frame rect by the given origin of the absolute containing block.
  // If the frame is auto-positioned on both sides of an axis, it will be
  // positioned based on its containing block and we don't need to offset
  // (unless the caller demands it (the STATIC_POS_IS_CB_ORIGIN case)).
  if (aContainingBlock.TopLeft() != nsPoint(0, 0)) {
    const nsStyleSides& offsets = kidReflowInput.mStylePosition->mOffset;
    if (!(offsets.GetLeftUnit() == eStyleUnit_Auto &&
          offsets.GetRightUnit() == eStyleUnit_Auto) ||
        (rsFlags & ReflowInput::STATIC_POS_IS_CB_ORIGIN)) {
      r.x += aContainingBlock.x;
    }
    if (!(offsets.GetTopUnit() == eStyleUnit_Auto &&
          offsets.GetBottomUnit() == eStyleUnit_Auto) ||
        (rsFlags & ReflowInput::STATIC_POS_IS_CB_ORIGIN)) {
      r.y += aContainingBlock.y;
    }
  }

  aKidFrame->SetRect(r);

  nsView* view = aKidFrame->GetView();
  if (view) {
    // Size and position the view and set its opacity, visibility, content
    // transparency, and clip
    nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
                                               kidDesiredSize.VisualOverflow());
  } else {
    nsContainerFrame::PositionChildViews(aKidFrame);
  }

  aKidFrame->DidReflow(aPresContext, &kidReflowInput,
                       nsDidReflowStatus::FINISHED);

#ifdef DEBUG
  if (nsBlockFrame::gNoisyReflow) {
    nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
    printf("abs pos ");
    nsAutoString name;
    aKidFrame->GetFrameName(name);
    printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
    printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
           r.x, r.y, r.width, r.height);
  }
#endif

  if (aOverflowAreas) {
    aOverflowAreas->UnionWith(kidDesiredSize.mOverflowAreas + r.TopLeft());
  }
}