DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (5350524bb654)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code is subject to the terms of the Mozilla Public License
 * version 2.0 (the "License"). You can obtain a copy of the License at
 * http://mozilla.org/MPL/2.0/. */

/* rendering object for CSS "display: ruby-text-container" */

#include "nsRubyTextContainerFrame.h"

#include "mozilla/UniquePtr.h"
#include "mozilla/WritingModes.h"
#include "nsLineLayout.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"

using namespace mozilla;

//----------------------------------------------------------------------

// Frame class boilerplate
// =======================

NS_QUERYFRAME_HEAD(nsRubyTextContainerFrame)
  NS_QUERYFRAME_ENTRY(nsRubyTextContainerFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)

NS_IMPL_FRAMEARENA_HELPERS(nsRubyTextContainerFrame)

nsContainerFrame*
NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
                             nsStyleContext* aContext)
{
  return new (aPresShell) nsRubyTextContainerFrame(aContext);
}


//----------------------------------------------------------------------

// nsRubyTextContainerFrame Method Implementations
// ===============================================

nsIAtom*
nsRubyTextContainerFrame::GetType() const
{
  return nsGkAtoms::rubyTextContainerFrame;
}

#ifdef DEBUG_FRAME_DUMP
nsresult
nsRubyTextContainerFrame::GetFrameName(nsAString& aResult) const
{
  return MakeFrameName(NS_LITERAL_STRING("RubyTextContainer"), aResult);
}
#endif

/* virtual */ bool
nsRubyTextContainerFrame::IsFrameOfType(uint32_t aFlags) const
{
  if (aFlags & eSupportsCSSTransforms) {
    return false;
  }
  return nsContainerFrame::IsFrameOfType(aFlags);
}

/* virtual */ void
nsRubyTextContainerFrame::SetInitialChildList(ChildListID aListID,
                                              nsFrameList& aChildList)
{
  nsContainerFrame::SetInitialChildList(aListID, aChildList);
  if (aListID == kPrincipalList) {
    UpdateSpanFlag();
  }
}

/* virtual */ void
nsRubyTextContainerFrame::AppendFrames(ChildListID aListID,
                                       nsFrameList& aFrameList)
{
  nsContainerFrame::AppendFrames(aListID, aFrameList);
  UpdateSpanFlag();
}

/* virtual */ void
nsRubyTextContainerFrame::InsertFrames(ChildListID aListID,
                                       nsIFrame* aPrevFrame,
                                       nsFrameList& aFrameList)
{
  nsContainerFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
  UpdateSpanFlag();
}

/* virtual */ void
nsRubyTextContainerFrame::RemoveFrame(ChildListID aListID,
                                      nsIFrame* aOldFrame)
{
  nsContainerFrame::RemoveFrame(aListID, aOldFrame);
  UpdateSpanFlag();
}

void
nsRubyTextContainerFrame::UpdateSpanFlag()
{
  bool isSpan = false;
  // The continuation checks are safe here because spans never break.
  if (!GetPrevContinuation() && !GetNextContinuation()) {
    nsIFrame* onlyChild = mFrames.OnlyChild();
    if (onlyChild && onlyChild->IsPseudoFrame(GetContent())) {
      // Per CSS Ruby spec, if the only child of an rtc frame is
      // a pseudo rt frame, it spans all bases in the segment.
      isSpan = true;
    }
  }

  if (isSpan) {
    AddStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
  } else {
    RemoveStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
  }
}

/* virtual */ void
nsRubyTextContainerFrame::Reflow(nsPresContext* aPresContext,
                                 ReflowOutput& aDesiredSize,
                                 const ReflowInput& aReflowInput,
                                 nsReflowStatus& aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsRubyTextContainerFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  // Although a ruby text container may have continuations, returning
  // NS_FRAME_COMPLETE here is still safe, since its parent, ruby frame,
  // ignores the status, and continuations of the ruby base container
  // will take care of our continuations.
  aStatus = NS_FRAME_COMPLETE;
  WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();

  nscoord minBCoord = nscoord_MAX;
  nscoord maxBCoord = nscoord_MIN;
  // The container size is not yet known, so we use a dummy (0, 0) size.
  // The block-dir position will be corrected below after containerSize
  // is finalized.
  const nsSize dummyContainerSize;
  for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
    nsIFrame* child = e.get();
    MOZ_ASSERT(child->GetType() == nsGkAtoms::rubyTextFrame);
    LogicalRect rect = child->GetLogicalRect(lineWM, dummyContainerSize);
    LogicalMargin margin = child->GetLogicalUsedMargin(lineWM);
    nscoord blockStart = rect.BStart(lineWM) - margin.BStart(lineWM);
    minBCoord = std::min(minBCoord, blockStart);
    nscoord blockEnd = rect.BEnd(lineWM) + margin.BEnd(lineWM);
    maxBCoord = std::max(maxBCoord, blockEnd);
  }

  LogicalSize size(lineWM, mISize, 0);
  if (!mFrames.IsEmpty()) {
    if (MOZ_UNLIKELY(minBCoord > maxBCoord)) {
      // XXX When bug 765861 gets fixed, this warning should be upgraded.
      NS_WARNING("bad block coord");
      minBCoord = maxBCoord = 0;
    }
    size.BSize(lineWM) = maxBCoord - minBCoord;
    nsSize containerSize = size.GetPhysicalSize(lineWM);
    for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
      nsIFrame* child = e.get();
      // We reflowed the child with a dummy container size, as the true size
      // was not yet known at that time.
      LogicalPoint pos = child->GetLogicalPosition(lineWM, dummyContainerSize);
      // Adjust block position to account for minBCoord,
      // then reposition child based on the true container width.
      pos.B(lineWM) -= minBCoord;
      // Relative positioning hasn't happened yet.
      // So MovePositionBy should not be used here.
      child->SetPosition(lineWM, pos, containerSize);
      nsContainerFrame::PlaceFrameView(child);
    }
  }

  aDesiredSize.SetSize(lineWM, size);
}