tor-browser

The Tor Browser
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nsContainerFrameInlines.h (4074B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef nsContainerFrameInlines_h___
      8 #define nsContainerFrameInlines_h___
      9 
     10 #include "nsContainerFrame.h"
     11 
     12 template <typename ISizeData, typename F>
     13 void nsContainerFrame::DoInlineIntrinsicISize(ISizeData* aData,
     14                                              F& aHandleChildren) {
     15  using namespace mozilla;
     16 
     17  auto GetMargin = [](const AnchorResolvedMargin& aCoord) -> nscoord {
     18    if (!aCoord->IsLengthPercentage()) {
     19      MOZ_ASSERT(aCoord->IsAuto(), "Didn't resolve anchor functions first?");
     20      return 0;
     21    }
     22    return aCoord->AsLengthPercentage().Resolve(0);
     23  };
     24 
     25  if (GetPrevInFlow()) {
     26    return;  // Already added.
     27  }
     28 
     29  WritingMode wm = GetWritingMode();
     30  Side startSide = wm.PhysicalSideForInlineAxis(LogicalEdge::Start);
     31  Side endSide = wm.PhysicalSideForInlineAxis(LogicalEdge::End);
     32 
     33  const nsStylePadding* stylePadding = StylePadding();
     34  const nsStyleBorder* styleBorder = StyleBorder();
     35  const nsStyleMargin* styleMargin = StyleMargin();
     36  const auto anchorResolutionParams = AnchorPosResolutionParams::From(this);
     37 
     38  // This goes at the beginning no matter how things are broken and how
     39  // messy the bidi situations are, since per CSS2.1 section 8.6
     40  // (implemented in bug 328168), the startSide border is always on the
     41  // first line.
     42  // This frame is a first-in-flow, but it might have a previous bidi
     43  // continuation, in which case that continuation should handle the startSide
     44  // border.
     45  // For box-decoration-break:clone we setup clonePBM = startPBM + endPBM and
     46  // add that to each line.  For box-decoration-break:slice clonePBM is zero.
     47  nscoord clonePBM = 0;  // PBM = PaddingBorderMargin
     48  const bool sliceBreak =
     49      styleBorder->mBoxDecorationBreak == StyleBoxDecorationBreak::Slice;
     50  if (!GetPrevContinuation() || MOZ_UNLIKELY(!sliceBreak)) {
     51    nscoord startPBM =
     52        // clamp negative calc() to 0
     53        std::max(stylePadding->mPadding.Get(startSide).Resolve(0), 0) +
     54        styleBorder->GetComputedBorderWidth(startSide) +
     55        GetMargin(styleMargin->GetMargin(startSide, anchorResolutionParams));
     56    if (MOZ_LIKELY(sliceBreak)) {
     57      aData->mCurrentLine += startPBM;
     58    } else {
     59      clonePBM = startPBM;
     60    }
     61  }
     62 
     63  nscoord endPBM =
     64      // clamp negative calc() to 0
     65      std::max(stylePadding->mPadding.Get(endSide).Resolve(0), 0) +
     66      styleBorder->GetComputedBorderWidth(endSide) +
     67      GetMargin(styleMargin->GetMargin(endSide, anchorResolutionParams));
     68  if (MOZ_UNLIKELY(!sliceBreak)) {
     69    clonePBM += endPBM;
     70    aData->mCurrentLine += clonePBM;
     71  }
     72 
     73  const LineListIterator* savedLine = aData->mLine;
     74  nsIFrame* const savedLineContainer = aData->LineContainer();
     75 
     76  nsContainerFrame* lastInFlow;
     77  for (nsContainerFrame* nif = this; nif;
     78       nif = static_cast<nsContainerFrame*>(nif->GetNextInFlow())) {
     79    if (aData->mCurrentLine == 0) {
     80      aData->mCurrentLine = clonePBM;
     81    }
     82    aHandleChildren(nif, aData);
     83 
     84    // After we advance to our next-in-flow, the stored line and line container
     85    // may no longer be correct. Just forget them.
     86    aData->mLine = nullptr;
     87    aData->SetLineContainer(nullptr);
     88 
     89    lastInFlow = nif;
     90  }
     91 
     92  aData->mLine = savedLine;
     93  aData->SetLineContainer(savedLineContainer);
     94 
     95  // This goes at the end no matter how things are broken and how
     96  // messy the bidi situations are, since per CSS2.1 section 8.6
     97  // (implemented in bug 328168), the endSide border is always on the
     98  // last line.
     99  // We reached the last-in-flow, but it might have a next bidi
    100  // continuation, in which case that continuation should handle
    101  // the endSide border.
    102  if (MOZ_LIKELY(!lastInFlow->GetNextContinuation() && sliceBreak)) {
    103    aData->mCurrentLine += endPBM;
    104  }
    105 }
    106 
    107 #endif  // nsContainerFrameInlines_h___