C++ nsHTMLReflowMetrics::Width方法代码示例

void
nsFormControlFrame::Reflow(nsPresContext*          aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsFormControlFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                 ("enter nsFormControlFrame::Reflow: aMaxSize=%d,%d",
                  aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));

  if (mState & NS_FRAME_FIRST_REFLOW) {
    RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
  }

  aStatus = NS_FRAME_COMPLETE;
  aDesiredSize.SetSize(aReflowState.GetWritingMode(),
                       aReflowState.ComputedSizeWithBorderPadding());

  if (nsLayoutUtils::FontSizeInflationEnabled(aPresContext)) {
    float inflation = nsLayoutUtils::FontSizeInflationFor(this);
    aDesiredSize.Width() *= inflation;
    aDesiredSize.Height() *= inflation;
  }

  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                 ("exit nsFormControlFrame::Reflow: size=%d,%d",
                  aDesiredSize.Width(), aDesiredSize.Height()));
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);

  aDesiredSize.SetOverflowAreasToDesiredBounds();
  FinishAndStoreOverflow(&aDesiredSize);
}

void
nsSubDocumentFrame::Reflow(nsPresContext*           aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsSubDocumentFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
  // printf("OuterFrame::Reflow %X (%d,%d) \n", this, aReflowState.AvailableWidth(), aReflowState.AvailableHeight());
  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
     ("enter nsSubDocumentFrame::Reflow: maxSize=%d,%d",
      aReflowState.AvailableWidth(), aReflowState.AvailableHeight()));

  aStatus = NS_FRAME_COMPLETE;

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

  // XUL <iframe> or <browser>, or HTML <iframe>, <object> or <embed>
  nsLeafFrame::DoReflow(aPresContext, aDesiredSize, aReflowState, aStatus);

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

  nsSize innerSize(aDesiredSize.Width(), aDesiredSize.Height());
  innerSize.width  -= aReflowState.ComputedPhysicalBorderPadding().LeftRight();
  innerSize.height -= aReflowState.ComputedPhysicalBorderPadding().TopBottom();

  if (mInnerView) {
    nsViewManager* vm = mInnerView->GetViewManager();
    vm->MoveViewTo(mInnerView, offset.x, offset.y);
    vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), innerSize), 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;
  }

  // printf("OuterFrame::Reflow DONE %X (%d,%d)\n", this,
  //        aDesiredSize.Width(), aDesiredSize.Height());

  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, aReflowState, aDesiredSize);
}

nsresult
nsLeafFrame::DoReflow(nsPresContext* aPresContext,
                      nsHTMLReflowMetrics& aMetrics,
                      const nsHTMLReflowState& aReflowState,
                      nsReflowStatus& aStatus)
{
  NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
               "Shouldn't have unconstrained stuff here "
               "Thanks to the rules of reflow");
  NS_ASSERTION(NS_INTRINSICSIZE != aReflowState.ComputedHeight(),
               "Shouldn't have unconstrained stuff here "
               "thanks to ComputeAutoSize");  

  aMetrics.Width() = aReflowState.ComputedWidth();
  aMetrics.Height() = aReflowState.ComputedHeight();
  
  AddBordersAndPadding(aReflowState, aMetrics);
  aStatus = NS_FRAME_COMPLETE;

  NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
                 ("exit nsLeafFrame::DoReflow: size=%d,%d",
                  aMetrics.Width(), aMetrics.Height()));
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);

  aMetrics.SetOverflowAreasToDesiredBounds();

  return NS_OK;
}

/* virtual */ void
nsMathMLmoFrame::GetIntrinsicISizeMetrics(nsRenderingContext *aRenderingContext, nsHTMLReflowMetrics& aDesiredSize)
{
  ProcessOperatorData();
  if (UseMathMLChar()) {
    uint32_t stretchHint = GetStretchHint(mFlags, mPresentationData, true,
                                          StyleFont());
    aDesiredSize.Width() = mMathMLChar.
      GetMaxWidth(PresContext(), *aRenderingContext,
                  stretchHint, mMaxSize,
                  NS_MATHML_OPERATOR_MAXSIZE_IS_ABSOLUTE(mFlags));
  }
  else {
    nsMathMLTokenFrame::GetIntrinsicISizeMetrics(aRenderingContext,
                                                 aDesiredSize);
  }

  // leadingSpace and trailingSpace are actually applied to the outermost
  // embellished container but for determining total intrinsic width it should
  // be safe to include it for the core here instead.
  bool isRTL = StyleVisibility()->mDirection;
  aDesiredSize.Width() +=
    mEmbellishData.leadingSpace + mEmbellishData.trailingSpace;
  aDesiredSize.mBoundingMetrics.width = aDesiredSize.Width();
  if (isRTL) {
    aDesiredSize.mBoundingMetrics.leftBearing += mEmbellishData.trailingSpace;
    aDesiredSize.mBoundingMetrics.rightBearing += mEmbellishData.trailingSpace;
  } else {
    aDesiredSize.mBoundingMetrics.leftBearing += mEmbellishData.leadingSpace;
    aDesiredSize.mBoundingMetrics.rightBearing += mEmbellishData.leadingSpace;
  }
}

static
void DebugCheckChildSize(nsIFrame*            aChild,
                         nsHTMLReflowMetrics& aMet,
                         nsSize&              aAvailSize)
{
  if ((aMet.Width() < 0) || (aMet.Width() > PROBABLY_TOO_LARGE)) {
    printf("WARNING: cell content %p has large width %d \n",
           static_cast<void*>(aChild), int32_t(aMet.Width()));
  }
}

void
nsMathMLTokenFrame::Reflow(nsPresContext*          aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus)
{
  // initializations needed for empty markup like <mtag></mtag>
  aDesiredSize.Width() = aDesiredSize.Height() = 0;
  aDesiredSize.SetTopAscent(0);
  aDesiredSize.mBoundingMetrics = nsBoundingMetrics();

  nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
  nsIFrame* childFrame = GetFirstPrincipalChild();
  while (childFrame) {
    // ask our children to compute their bounding metrics
    nsHTMLReflowMetrics childDesiredSize(aReflowState.GetWritingMode(),
                                         aDesiredSize.mFlags
                                         | NS_REFLOW_CALC_BOUNDING_METRICS);
    nsHTMLReflowState childReflowState(aPresContext, aReflowState,
                                       childFrame, availSize);
    ReflowChild(childFrame, aPresContext, childDesiredSize,
                childReflowState, aStatus);
    //NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
    SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
                                    childDesiredSize.mBoundingMetrics);

    childFrame = childFrame->GetNextSibling();
  }

  // place and size children
  FinalizeReflow(*aReflowState.rendContext, aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}

nsresult
nsSVGForeignObjectFrame::Reflow(nsPresContext*           aPresContext,
                                nsHTMLReflowMetrics&     aDesiredSize,
                                const nsHTMLReflowState& aReflowState,
                                nsReflowStatus&          aStatus)
{
  NS_ABORT_IF_FALSE(!(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(!aReflowState.parentReflowState,
               "should only get reflow from being reflow root");
  NS_ASSERTION(aReflowState.ComputedWidth() == GetSize().width &&
               aReflowState.ComputedHeight() == GetSize().height,
               "reflow roots should be reflowed at existing size and "
               "svg.css should ensure we have no padding/border/margin");

  DoReflow();

  aDesiredSize.Width() = aReflowState.ComputedWidth();
  aDesiredSize.Height() = aReflowState.ComputedHeight();
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  aStatus = NS_FRAME_COMPLETE;

  return NS_OK;
}

void
nsMathMLmspaceFrame::Reflow(nsPresContext*          aPresContext,
                            nsHTMLReflowMetrics&     aDesiredSize,
                            const nsHTMLReflowState& aReflowState,
                            nsReflowStatus&          aStatus)
{
  MarkInReflow();
  mPresentationData.flags &= ~NS_MATHML_ERROR;
  ProcessAttributes(aPresContext);

  mBoundingMetrics = nsBoundingMetrics();
  mBoundingMetrics.width = mWidth;
  mBoundingMetrics.ascent = mHeight;
  mBoundingMetrics.descent = mDepth;
  mBoundingMetrics.leftBearing = 0;
  mBoundingMetrics.rightBearing = mBoundingMetrics.width;

  aDesiredSize.SetBlockStartAscent(mHeight);
  aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
  aDesiredSize.Height() = aDesiredSize.BlockStartAscent() + mDepth;
  // Also return our bounding metrics
  aDesiredSize.mBoundingMetrics = mBoundingMetrics;

  aStatus = NS_FRAME_COMPLETE;
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}

nsresult
nsFormControlFrame::Reflow(nsPresContext*          aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsFormControlFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);

  if (mState & NS_FRAME_FIRST_REFLOW) {
    RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
  }

  nsresult rv = nsLeafFrame::Reflow(aPresContext, aDesiredSize, aReflowState,
                                    aStatus);
  if (NS_FAILED(rv)) {
    return rv;
  }

  if (nsLayoutUtils::FontSizeInflationEnabled(aPresContext)) {
    float inflation = nsLayoutUtils::FontSizeInflationFor(this);
    aDesiredSize.Width() *= inflation;
    aDesiredSize.Height() *= inflation;
    aDesiredSize.UnionOverflowAreasWithDesiredBounds();
    FinishAndStoreOverflow(&aDesiredSize);
  }
  return NS_OK;
}

// XXX how should border&padding effect baseline alignment?
// => descent = borderPadding.bottom for example
void
nsLeafFrame::AddBordersAndPadding(const nsHTMLReflowState& aReflowState,
                                  nsHTMLReflowMetrics& aMetrics)
{
  aMetrics.Width() += aReflowState.ComputedPhysicalBorderPadding().LeftRight();
  aMetrics.Height() += aReflowState.ComputedPhysicalBorderPadding().TopBottom();
}

void
nsGridContainerFrame::Reflow(nsPresContext*           aPresContext,
                             nsHTMLReflowMetrics&     aDesiredSize,
                             const nsHTMLReflowState& aReflowState,
                             nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsGridContainerFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);

  if (IsFrameTreeTooDeep(aReflowState, aDesiredSize, aStatus)) {
    return;
  }

  nsMargin bp = aReflowState.ComputedPhysicalBorderPadding();
  ApplySkipSides(bp);
  nscoord contentHeight = GetEffectiveComputedHeight(aReflowState);
  if (contentHeight == NS_AUTOHEIGHT) {
    contentHeight = 0;
  }
  aDesiredSize.Width() = aReflowState.ComputedWidth() + bp.LeftRight();
  aDesiredSize.Height() = contentHeight + bp.TopBottom();
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  aStatus = NS_FRAME_COMPLETE;
  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}

/* virtual */ void
nsMathMLmrootFrame::GetIntrinsicISizeMetrics(nsRenderingContext* aRenderingContext, nsHTMLReflowMetrics& aDesiredSize)
{
  nsIFrame* baseFrame = mFrames.FirstChild();
  nsIFrame* indexFrame = nullptr;
  if (baseFrame)
    indexFrame = baseFrame->GetNextSibling();
  if (!indexFrame || indexFrame->GetNextSibling()) {
    ReflowError(aRenderingContext->GetDrawTarget(), aDesiredSize);
    return;
  }

  float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
  nscoord baseWidth =
    nsLayoutUtils::IntrinsicForContainer(aRenderingContext, baseFrame,
                                         nsLayoutUtils::PREF_ISIZE);
  nscoord indexWidth =
    nsLayoutUtils::IntrinsicForContainer(aRenderingContext, indexFrame,
                                         nsLayoutUtils::PREF_ISIZE);
  nscoord sqrWidth = mSqrChar.GetMaxWidth(PresContext(),
                                          aRenderingContext->GetDrawTarget(),
                                          fontSizeInflation);

  nscoord dxSqr;
  RefPtr<nsFontMetrics> fm =
    nsLayoutUtils::GetFontMetricsForFrame(this, fontSizeInflation);
  GetRadicalXOffsets(indexWidth, sqrWidth, fm, nullptr, &dxSqr);

  nscoord width = dxSqr + sqrWidth + baseWidth;

  aDesiredSize.Width() = width;
  aDesiredSize.mBoundingMetrics.width = width;
  aDesiredSize.mBoundingMetrics.leftBearing = 0;
  aDesiredSize.mBoundingMetrics.rightBearing = width;
}

void
nsLeafFrame::SizeToAvailSize(const nsHTMLReflowState& aReflowState,
                             nsHTMLReflowMetrics& aDesiredSize)
{
  aDesiredSize.Width() = aReflowState.AvailableWidth(); // FRAME
  aDesiredSize.Height() = aReflowState.AvailableHeight();
  aDesiredSize.SetOverflowAreasToDesiredBounds();
  FinishAndStoreOverflow(&aDesiredSize);  
}

/* virtual */ nsresult
nsMathMLmspaceFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
                                     nsHTMLReflowMetrics& aDesiredSize)
{
  ProcessAttributes(PresContext());
  mBoundingMetrics = nsBoundingMetrics();
  mBoundingMetrics.width = mWidth;
  aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
  aDesiredSize.mBoundingMetrics = mBoundingMetrics;
  return NS_OK;
}

void
nsRangeFrame::Reflow(nsPresContext*           aPresContext,
                     nsHTMLReflowMetrics&     aDesiredSize,
                     const nsHTMLReflowState& aReflowState,
                     nsReflowStatus&          aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsRangeFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);

  NS_ASSERTION(mTrackDiv, "::-moz-range-track div must exist!");
  NS_ASSERTION(mProgressDiv, "::-moz-range-progress div must exist!");
  NS_ASSERTION(mThumbDiv, "::-moz-range-thumb div must exist!");
  NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
               "nsRangeFrame 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);
  }

  nscoord computedHeight = aReflowState.ComputedHeight();
  if (computedHeight == NS_AUTOHEIGHT) {
    computedHeight = 0;
  }
  aDesiredSize.Width() = aReflowState.ComputedWidth() +
                       aReflowState.ComputedPhysicalBorderPadding().LeftRight();
  aDesiredSize.Height() = computedHeight +
                        aReflowState.ComputedPhysicalBorderPadding().TopBottom();

  ReflowAnonymousContent(aPresContext, aDesiredSize, aReflowState);

  aDesiredSize.SetOverflowAreasToDesiredBounds();

  nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
  if (trackFrame) {
    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, trackFrame);
  }

  nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
  if (rangeProgressFrame) {
    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rangeProgressFrame);
  }

  nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
  if (thumbFrame) {
    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, thumbFrame);
  }

  FinishAndStoreOverflow(&aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}