gecko/layout/generic/nsBulletFrame.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* rendering object for list-item bullets */

#include "nsBulletFrame.h"

#include "mozilla/MathAlgorithms.h"
#include "nsCOMPtr.h"
#include "nsGkAtoms.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIDocument.h"
#include "nsRenderingContext.h"
#include "prprf.h"
#include "nsDisplayList.h"
#include "nsCounterManager.h"
#include "nsBidiUtils.h"

#include "imgIContainer.h"
#include "imgRequestProxy.h"
#include "nsIURI.h"

#include <algorithm>

#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif

using namespace mozilla;

NS_DECLARE_FRAME_PROPERTY(FontSizeInflationProperty, nullptr)

NS_IMPL_FRAMEARENA_HELPERS(nsBulletFrame)

#ifdef DEBUG
NS_QUERYFRAME_HEAD(nsBulletFrame)
  NS_QUERYFRAME_ENTRY(nsBulletFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsFrame)
#endif

nsBulletFrame::~nsBulletFrame()
{
}

void
nsBulletFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
  // Stop image loading first
  if (mImageRequest) {
    // Deregister our image request from the refresh driver
    nsLayoutUtils::DeregisterImageRequest(PresContext(),
                                          mImageRequest,
                                          &mRequestRegistered);
    mImageRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
    mImageRequest = nullptr;
  }

  if (mListener) {
    mListener->SetFrame(nullptr);
  }

  // Let base class do the rest
  nsFrame::DestroyFrom(aDestructRoot);
}

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

nsIAtom*
nsBulletFrame::GetType() const
{
  return nsGkAtoms::bulletFrame;
}

bool
nsBulletFrame::IsEmpty()
{
  return IsSelfEmpty();
}

bool
nsBulletFrame::IsSelfEmpty() 
{
  return StyleList()->mListStyleType == NS_STYLE_LIST_STYLE_NONE;
}

/* virtual */ void
nsBulletFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
  nsFrame::DidSetStyleContext(aOldStyleContext);

  imgRequestProxy *newRequest = StyleList()->GetListStyleImage();

  if (newRequest) {

    if (!mListener) {
      mListener = new nsBulletListener();
      mListener->SetFrame(this);
    }

    bool needNewRequest = true;

    if (mImageRequest) {
      // Reload the image, maybe...
      nsCOMPtr<nsIURI> oldURI;
      mImageRequest->GetURI(getter_AddRefs(oldURI));
      nsCOMPtr<nsIURI> newURI;
      newRequest->GetURI(getter_AddRefs(newURI));
      if (oldURI && newURI) {
        bool same;
        newURI->Equals(oldURI, &same);
        if (same) {
          needNewRequest = false;
        }
      }
    }

    if (needNewRequest) {
      nsRefPtr<imgRequestProxy> oldRequest = mImageRequest;
      newRequest->Clone(mListener, getter_AddRefs(mImageRequest));

      // Deregister the old request. We wait until after Clone is done in case
      // the old request and the new request are the same underlying image
      // accessed via different URLs.
      if (oldRequest) {
        nsLayoutUtils::DeregisterImageRequest(PresContext(), oldRequest,
                                              &mRequestRegistered);
        oldRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
        oldRequest = nullptr;
      }

      // Register the new request.
      if (mImageRequest) {
        nsLayoutUtils::RegisterImageRequestIfAnimated(PresContext(),
                                                      mImageRequest,
                                                      &mRequestRegistered);
      }
    }
  } else {
    // No image request on the new style context
    if (mImageRequest) {
      nsLayoutUtils::DeregisterImageRequest(PresContext(), mImageRequest,
                                            &mRequestRegistered);

      mImageRequest->CancelAndForgetObserver(NS_ERROR_FAILURE);
      mImageRequest = nullptr;
    }
  }

#ifdef ACCESSIBILITY
  // Update the list bullet accessible. If old style list isn't available then
  // no need to update the accessible tree because it's not created yet.
  if (aOldStyleContext) {
    nsAccessibilityService* accService = nsIPresShell::AccService();
    if (accService) {
      const nsStyleList* oldStyleList = aOldStyleContext->PeekStyleList();
      if (oldStyleList) {
        bool hadBullet = oldStyleList->GetListStyleImage() ||
            oldStyleList->mListStyleType != NS_STYLE_LIST_STYLE_NONE;

        const nsStyleList* newStyleList = StyleList();
        bool hasBullet = newStyleList->GetListStyleImage() ||
            newStyleList->mListStyleType != NS_STYLE_LIST_STYLE_NONE;

        if (hadBullet != hasBullet) {
          accService->UpdateListBullet(PresContext()->GetPresShell(), mContent,
                                       hasBullet);
        }
      }
    }
  }
#endif
}

class nsDisplayBulletGeometry : public nsDisplayItemGenericGeometry
{
public:
  nsDisplayBulletGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
    : nsDisplayItemGenericGeometry(aItem, aBuilder)
  {
    nsBulletFrame* f = static_cast<nsBulletFrame*>(aItem->Frame());
    mOrdinal = f->GetOrdinal();
  }

  int32_t mOrdinal;
};

class nsDisplayBullet : public nsDisplayItem {
public:
  nsDisplayBullet(nsDisplayListBuilder* aBuilder, nsBulletFrame* aFrame) :
    nsDisplayItem(aBuilder, aFrame) {
    MOZ_COUNT_CTOR(nsDisplayBullet);
  }
#ifdef NS_BUILD_REFCNT_LOGGING
  virtual ~nsDisplayBullet() {
    MOZ_COUNT_DTOR(nsDisplayBullet);
  }
#endif

  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
                           bool* aSnap) MOZ_OVERRIDE
  {
    *aSnap = false;
    return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
  }
  virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                       HitTestState* aState,
                       nsTArray<nsIFrame*> *aOutFrames) MOZ_OVERRIDE {
    aOutFrames->AppendElement(mFrame);
  }
  virtual void Paint(nsDisplayListBuilder* aBuilder,
                     nsRenderingContext* aCtx) MOZ_OVERRIDE;
  NS_DISPLAY_DECL_NAME("Bullet", TYPE_BULLET)

  virtual nsRect GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder) MOZ_OVERRIDE
  {
    bool snap;
    return GetBounds(aBuilder, &snap);
  }

  virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) MOZ_OVERRIDE
  {
    return new nsDisplayBulletGeometry(this, aBuilder);
  }

  virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
                                         const nsDisplayItemGeometry* aGeometry,
                                         nsRegion *aInvalidRegion) MOZ_OVERRIDE
  {
    const nsDisplayBulletGeometry* geometry = static_cast<const nsDisplayBulletGeometry*>(aGeometry);
    nsBulletFrame* f = static_cast<nsBulletFrame*>(mFrame);

    if (f->GetOrdinal() != geometry->mOrdinal) {
      bool snap;
      aInvalidRegion->Or(geometry->mBounds, GetBounds(aBuilder, &snap));
      return;
    }

    nsCOMPtr<imgIContainer> image = f->GetImage();
    if (aBuilder->ShouldSyncDecodeImages() && image && !image->IsDecoded()) {
      // If we are going to do a sync decode and we are not decoded then we are
      // going to be drawing something different from what is currently there,
      // so we add our bounds to the invalid region.
      bool snap;
      aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
    }

    return nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
  }
};

void nsDisplayBullet::Paint(nsDisplayListBuilder* aBuilder,
                            nsRenderingContext* aCtx)
{
  uint32_t flags = imgIContainer::FLAG_NONE;
  if (aBuilder->ShouldSyncDecodeImages()) {
    flags |= imgIContainer::FLAG_SYNC_DECODE;
  }
  static_cast<nsBulletFrame*>(mFrame)->
    PaintBullet(*aCtx, ToReferenceFrame(), mVisibleRect, flags);
}

void
nsBulletFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsRect&           aDirtyRect,
                                const nsDisplayListSet& aLists)
{
  if (!IsVisibleForPainting(aBuilder))
    return;

  DO_GLOBAL_REFLOW_COUNT_DSP("nsBulletFrame");
  
  aLists.Content()->AppendNewToTop(
    new (aBuilder) nsDisplayBullet(aBuilder, this));
}

void
nsBulletFrame::PaintBullet(nsRenderingContext& aRenderingContext, nsPoint aPt,
                           const nsRect& aDirtyRect, uint32_t aFlags)
{
  const nsStyleList* myList = StyleList();
  uint8_t listStyleType = myList->mListStyleType;

  if (myList->GetListStyleImage() && mImageRequest) {
    uint32_t status;
    mImageRequest->GetImageStatus(&status);
    if (status & imgIRequest::STATUS_LOAD_COMPLETE &&
        !(status & imgIRequest::STATUS_ERROR)) {
      nsCOMPtr<imgIContainer> imageCon;
      mImageRequest->GetImage(getter_AddRefs(imageCon));
      if (imageCon) {
        nsRect dest(mPadding.left, mPadding.top,
                    mRect.width - (mPadding.left + mPadding.right),
                    mRect.height - (mPadding.top + mPadding.bottom));
        nsLayoutUtils::DrawSingleImage(&aRenderingContext,
             imageCon, nsLayoutUtils::GetGraphicsFilterForFrame(this),
             dest + aPt, aDirtyRect, nullptr, aFlags);
        return;
      }
    }
  }

  nsRefPtr<nsFontMetrics> fm;
  aRenderingContext.SetColor(nsLayoutUtils::GetColor(this, eCSSProperty_color));

  nsAutoString text;
  switch (listStyleType) {
  case NS_STYLE_LIST_STYLE_NONE:
    break;

  default:
  case NS_STYLE_LIST_STYLE_DISC:
    aRenderingContext.FillEllipse(mPadding.left + aPt.x, mPadding.top + aPt.y,
                                  mRect.width - (mPadding.left + mPadding.right),
                                  mRect.height - (mPadding.top + mPadding.bottom));
    break;

  case NS_STYLE_LIST_STYLE_CIRCLE:
    aRenderingContext.DrawEllipse(mPadding.left + aPt.x, mPadding.top + aPt.y,
                                  mRect.width - (mPadding.left + mPadding.right),
                                  mRect.height - (mPadding.top + mPadding.bottom));
    break;

  case NS_STYLE_LIST_STYLE_SQUARE:
    {
      nsRect rect(aPt, mRect.Size());
      rect.Deflate(mPadding);

      // Snap the height and the width of the rectangle to device pixels,
      // and then center the result within the original rectangle, so that
      // all square bullets at the same font size have the same visual
      // size (bug 376690).
      // FIXME: We should really only do this if we're not transformed
      // (like gfxContext::UserToDevicePixelSnapped does).
      nsPresContext *pc = PresContext();
      nsRect snapRect(rect.x, rect.y, 
                      pc->RoundAppUnitsToNearestDevPixels(rect.width),
                      pc->RoundAppUnitsToNearestDevPixels(rect.height));
      snapRect.MoveBy((rect.width - snapRect.width) / 2,
                      (rect.height - snapRect.height) / 2);
      aRenderingContext.FillRect(snapRect.x, snapRect.y,
                                 snapRect.width, snapRect.height);
    }
    break;

  case NS_STYLE_LIST_STYLE_DECIMAL:
  case NS_STYLE_LIST_STYLE_DECIMAL_LEADING_ZERO:
  case NS_STYLE_LIST_STYLE_CJK_DECIMAL:
  case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
  case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
  case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
  case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
  case NS_STYLE_LIST_STYLE_LOWER_GREEK:
  case NS_STYLE_LIST_STYLE_HEBREW:
  case NS_STYLE_LIST_STYLE_ARMENIAN:
  case NS_STYLE_LIST_STYLE_GEORGIAN:
  case NS_STYLE_LIST_STYLE_CJK_IDEOGRAPHIC:
  case NS_STYLE_LIST_STYLE_HIRAGANA:
  case NS_STYLE_LIST_STYLE_KATAKANA:
  case NS_STYLE_LIST_STYLE_HIRAGANA_IROHA:
  case NS_STYLE_LIST_STYLE_KATAKANA_IROHA:
  case NS_STYLE_LIST_STYLE_JAPANESE_INFORMAL:
  case NS_STYLE_LIST_STYLE_JAPANESE_FORMAL:
  case NS_STYLE_LIST_STYLE_KOREAN_HANGUL_FORMAL:
  case NS_STYLE_LIST_STYLE_KOREAN_HANJA_INFORMAL:
  case NS_STYLE_LIST_STYLE_KOREAN_HANJA_FORMAL:
  case NS_STYLE_LIST_STYLE_SIMP_CHINESE_INFORMAL:
  case NS_STYLE_LIST_STYLE_SIMP_CHINESE_FORMAL:
  case NS_STYLE_LIST_STYLE_TRAD_CHINESE_INFORMAL:
  case NS_STYLE_LIST_STYLE_TRAD_CHINESE_FORMAL:
  case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_INFORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_FORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_INFORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_FORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_INFORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_FORMAL: 
  case NS_STYLE_LIST_STYLE_MOZ_CJK_HEAVENLY_STEM:
  case NS_STYLE_LIST_STYLE_MOZ_CJK_EARTHLY_BRANCH:
  case NS_STYLE_LIST_STYLE_MOZ_ARABIC_INDIC:
  case NS_STYLE_LIST_STYLE_MOZ_PERSIAN:
  case NS_STYLE_LIST_STYLE_MOZ_URDU:
  case NS_STYLE_LIST_STYLE_MOZ_DEVANAGARI:
  case NS_STYLE_LIST_STYLE_MOZ_GURMUKHI:
  case NS_STYLE_LIST_STYLE_MOZ_GUJARATI:
  case NS_STYLE_LIST_STYLE_MOZ_ORIYA:
  case NS_STYLE_LIST_STYLE_MOZ_KANNADA:
  case NS_STYLE_LIST_STYLE_MOZ_MALAYALAM:
  case NS_STYLE_LIST_STYLE_MOZ_BENGALI:
  case NS_STYLE_LIST_STYLE_MOZ_TAMIL:
  case NS_STYLE_LIST_STYLE_MOZ_TELUGU:
  case NS_STYLE_LIST_STYLE_MOZ_THAI:
  case NS_STYLE_LIST_STYLE_MOZ_LAO:
  case NS_STYLE_LIST_STYLE_MOZ_MYANMAR:
  case NS_STYLE_LIST_STYLE_MOZ_KHMER:
  case NS_STYLE_LIST_STYLE_MOZ_HANGUL:
  case NS_STYLE_LIST_STYLE_MOZ_HANGUL_CONSONANT:
  case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME:
  case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_NUMERIC:
  case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_AM:
  case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ER:
  case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ET:
    nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
                                          GetFontSizeInflation());
    GetListItemText(*myList, text);
    aRenderingContext.SetFont(fm);
    nscoord ascent = fm->MaxAscent();
    aPt.MoveBy(mPadding.left, mPadding.top);
    aPt.y = NSToCoordRound(nsLayoutUtils::GetSnappedBaselineY(
            this, aRenderingContext.ThebesContext(), aPt.y, ascent));
    nsPresContext* presContext = PresContext();
    if (!presContext->BidiEnabled() && HasRTLChars(text)) {
      presContext->SetBidiEnabled();
    }
    nsLayoutUtils::DrawString(this, &aRenderingContext,
                              text.get(), text.Length(), aPt);
    break;
  }
}

int32_t
nsBulletFrame::SetListItemOrdinal(int32_t aNextOrdinal,
                                  bool* aChanged,
                                  int32_t aIncrement)
{
  MOZ_ASSERT(aIncrement == 1 || aIncrement == -1,
             "We shouldn't have weird increments here");

  // Assume that the ordinal comes from the caller
  int32_t oldOrdinal = mOrdinal;
  mOrdinal = aNextOrdinal;

  // Try to get value directly from the list-item, if it specifies a
  // value attribute. Note: we do this with our parent's content
  // because our parent is the list-item.
  nsIContent* parentContent = GetParent()->GetContent();
  if (parentContent) {
    nsGenericHTMLElement *hc =
      nsGenericHTMLElement::FromContent(parentContent);
    if (hc) {
      const nsAttrValue* attr = hc->GetParsedAttr(nsGkAtoms::value);
      if (attr && attr->Type() == nsAttrValue::eInteger) {
        // Use ordinal specified by the value attribute
        mOrdinal = attr->GetIntegerValue();
      }
    }
  }

  *aChanged = oldOrdinal != mOrdinal;

  return nsCounterManager::IncrementCounter(mOrdinal, aIncrement);
}


// XXX change roman/alpha to use unsigned math so that maxint and
// maxnegint will work

/**
 * For all functions below, a return value of true means that we
 * could represent mOrder in the desired numbering system.  false
 * means we had to fall back to decimal
 */
static bool DecimalToText(int32_t ordinal, nsString& result)
{
   char cbuf[40];
   PR_snprintf(cbuf, sizeof(cbuf), "%ld", ordinal);
   result.AppendASCII(cbuf);
   return true;
}
static bool DecimalLeadingZeroToText(int32_t ordinal, nsString& result)
{
   char cbuf[40];
   PR_snprintf(cbuf, sizeof(cbuf), "%02ld", ordinal);
   result.AppendASCII(cbuf);
   return true;
}
static bool OtherDecimalToText(int32_t ordinal, char16_t zeroChar, nsString& result)
{
   char16_t diff = zeroChar - char16_t('0');
   // We're going to be appending to whatever is in "result" already, so make
   // sure to only munge the new bits.  Note that we can't just grab the pointer
   // to the new stuff here, since appending to the string can realloc.
   size_t offset = result.Length();
   DecimalToText(ordinal, result);
   char16_t* p = result.BeginWriting() + offset;
   if (ordinal < 0) {
     // skip the leading '-'
     ++p;
   }     
   for(; '\0' != *p ; p++) 
      *p += diff;
   return true;
}
static bool TamilToText(int32_t ordinal,  nsString& result)
{
   if (ordinal < 1 || ordinal > 9999) {
     // Can't do those in this system.
     return false;
   }
   char16_t diff = 0x0BE6 - char16_t('0');
   // We're going to be appending to whatever is in "result" already, so make
   // sure to only munge the new bits.  Note that we can't just grab the pointer
   // to the new stuff here, since appending to the string can realloc.
   size_t offset = result.Length();
   DecimalToText(ordinal, result); 
   char16_t* p = result.BeginWriting() + offset;
   for(; '\0' != *p ; p++) 
      if(*p != char16_t('0'))
         *p += diff;
   return true;
}


static const char gLowerRomanCharsA[] = "ixcm";
static const char gUpperRomanCharsA[] = "IXCM";
static const char gLowerRomanCharsB[] = "vld";
static const char gUpperRomanCharsB[] = "VLD";

static bool RomanToText(int32_t ordinal, nsString& result, const char* achars, const char* bchars)
{
  if (ordinal < 1 || ordinal > 3999) {
    return false;
  }
  nsAutoString addOn, decStr;
  decStr.AppendInt(ordinal, 10);
  int len = decStr.Length();
  const char16_t* dp = decStr.get();
  const char16_t* end = dp + len;
  int romanPos = len;
  int n;

  for (; dp < end; dp++) {
    romanPos--;
    addOn.SetLength(0);
    switch(*dp) {
      case '3':
        addOn.Append(char16_t(achars[romanPos]));
        // FALLTHROUGH
      case '2':
        addOn.Append(char16_t(achars[romanPos]));
        // FALLTHROUGH
      case '1':
        addOn.Append(char16_t(achars[romanPos]));
        break;
      case '4':
        addOn.Append(char16_t(achars[romanPos]));
        // FALLTHROUGH
      case '5': case '6':
      case '7': case '8':
        addOn.Append(char16_t(bchars[romanPos]));
        for(n=0;'5'+n<*dp;n++) {
          addOn.Append(char16_t(achars[romanPos]));
        }
        break;
      case '9':
        addOn.Append(char16_t(achars[romanPos]));
        addOn.Append(char16_t(achars[romanPos+1]));
        break;
      default:
        break;
    }
    result.Append(addOn);
  }
  return true;
}

#define ALPHA_SIZE 26
static const char16_t gLowerAlphaChars[ALPHA_SIZE]  = 
{
0x0061, 0x0062, 0x0063, 0x0064, 0x0065, // A   B   C   D   E
0x0066, 0x0067, 0x0068, 0x0069, 0x006A, // F   G   H   I   J
0x006B, 0x006C, 0x006D, 0x006E, 0x006F, // K   L   M   N   O
0x0070, 0x0071, 0x0072, 0x0073, 0x0074, // P   Q   R   S   T
0x0075, 0x0076, 0x0077, 0x0078, 0x0079, // U   V   W   X   Y
0x007A                                  // Z
};

static const char16_t gUpperAlphaChars[ALPHA_SIZE]  = 
{
0x0041, 0x0042, 0x0043, 0x0044, 0x0045, // A   B   C   D   E
0x0046, 0x0047, 0x0048, 0x0049, 0x004A, // F   G   H   I   J
0x004B, 0x004C, 0x004D, 0x004E, 0x004F, // K   L   M   N   O
0x0050, 0x0051, 0x0052, 0x0053, 0x0054, // P   Q   R   S   T
0x0055, 0x0056, 0x0057, 0x0058, 0x0059, // U   V   W   X   Y
0x005A                                  // Z
};


#define KATAKANA_CHARS_SIZE 48
// Page 94 Writing Systems of The World
// after modification by momoi
static const char16_t gKatakanaChars[KATAKANA_CHARS_SIZE] =
{
0x30A2, 0x30A4, 0x30A6, 0x30A8, 0x30AA, //  a    i   u    e    o
0x30AB, 0x30AD, 0x30AF, 0x30B1, 0x30B3, // ka   ki  ku   ke   ko
0x30B5, 0x30B7, 0x30B9, 0x30BB, 0x30BD, // sa  shi  su   se   so
0x30BF, 0x30C1, 0x30C4, 0x30C6, 0x30C8, // ta  chi tsu   te   to
0x30CA, 0x30CB, 0x30CC, 0x30CD, 0x30CE, // na   ni  nu   ne   no
0x30CF, 0x30D2, 0x30D5, 0x30D8, 0x30DB, // ha   hi  hu   he   ho
0x30DE, 0x30DF, 0x30E0, 0x30E1, 0x30E2, // ma   mi  mu   me   mo
0x30E4,         0x30E6,         0x30E8, // ya       yu        yo 
0x30E9, 0x30EA, 0x30EB, 0x30EC, 0x30ED, // ra   ri  ru   re   ro
0x30EF, 0x30F0,         0x30F1, 0x30F2, // wa (w)i     (w)e (w)o
0x30F3                                  //  n
};

#define HIRAGANA_CHARS_SIZE 48 
static const char16_t gHiraganaChars[HIRAGANA_CHARS_SIZE] =
{
0x3042, 0x3044, 0x3046, 0x3048, 0x304A, //  a    i    u    e    o
0x304B, 0x304D, 0x304F, 0x3051, 0x3053, // ka   ki   ku   ke   ko
0x3055, 0x3057, 0x3059, 0x305B, 0x305D, // sa  shi   su   se   so
0x305F, 0x3061, 0x3064, 0x3066, 0x3068, // ta  chi  tsu   te   to
0x306A, 0x306B, 0x306C, 0x306D, 0x306E, // na   ni   nu   ne   no
0x306F, 0x3072, 0x3075, 0x3078, 0x307B, // ha   hi   hu   he   ho
0x307E, 0x307F, 0x3080, 0x3081, 0x3082, // ma   mi   mu   me   mo
0x3084,         0x3086,         0x3088, // ya        yu       yo 
0x3089, 0x308A, 0x308B, 0x308C, 0x308D, // ra   ri   ru   re   ro
0x308F, 0x3090,         0x3091, 0x3092, // wa (w)i      (w)e (w)o
0x3093                                  // n
};


#define HIRAGANA_IROHA_CHARS_SIZE 47
// Page 94 Writing Systems of The World
static const char16_t gHiraganaIrohaChars[HIRAGANA_IROHA_CHARS_SIZE] =
{
0x3044, 0x308D, 0x306F, 0x306B, 0x307B, //  i   ro   ha   ni   ho
0x3078, 0x3068, 0x3061, 0x308A, 0x306C, // he   to  chi   ri   nu
0x308B, 0x3092, 0x308F, 0x304B, 0x3088, // ru (w)o   wa   ka   yo
0x305F, 0x308C, 0x305D, 0x3064, 0x306D, // ta   re   so  tsu   ne
0x306A, 0x3089, 0x3080, 0x3046, 0x3090, // na   ra   mu    u (w)i
0x306E, 0x304A, 0x304F, 0x3084, 0x307E, // no    o   ku   ya   ma
0x3051, 0x3075, 0x3053, 0x3048, 0x3066, // ke   hu   ko    e   te
0x3042, 0x3055, 0x304D, 0x3086, 0x3081, //  a   sa   ki   yu   me
0x307F, 0x3057, 0x3091, 0x3072, 0x3082, // mi  shi (w)e   hi   mo 
0x305B, 0x3059                          // se   su
};

#define KATAKANA_IROHA_CHARS_SIZE 47
static const char16_t gKatakanaIrohaChars[KATAKANA_IROHA_CHARS_SIZE] =
{
0x30A4, 0x30ED, 0x30CF, 0x30CB, 0x30DB, //  i   ro   ha   ni   ho
0x30D8, 0x30C8, 0x30C1, 0x30EA, 0x30CC, // he   to  chi   ri   nu
0x30EB, 0x30F2, 0x30EF, 0x30AB, 0x30E8, // ru (w)o   wa   ka   yo
0x30BF, 0x30EC, 0x30BD, 0x30C4, 0x30CD, // ta   re   so  tsu   ne
0x30CA, 0x30E9, 0x30E0, 0x30A6, 0x30F0, // na   ra   mu    u (w)i
0x30CE, 0x30AA, 0x30AF, 0x30E4, 0x30DE, // no    o   ku   ya   ma
0x30B1, 0x30D5, 0x30B3, 0x30A8, 0x30C6, // ke   hu   ko    e   te
0x30A2, 0x30B5, 0x30AD, 0x30E6, 0x30E1, //  a   sa   ki   yu   me
0x30DF, 0x30B7, 0x30F1, 0x30D2, 0x30E2, // mi  shi (w)e   hi   mo 
0x30BB, 0x30B9                          // se   su
};

#define LOWER_GREEK_CHARS_SIZE 24
// Note: 0x03C2 GREEK FINAL SIGMA is not used in here....
static const char16_t gLowerGreekChars[LOWER_GREEK_CHARS_SIZE] =
{
0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, // alpha  beta  gamma  delta  epsilon
0x03B6, 0x03B7, 0x03B8, 0x03B9, 0x03BA, // zeta   eta   theta  iota   kappa   
0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF, // lamda  mu    nu     xi     omicron 
0x03C0, 0x03C1, 0x03C3, 0x03C4, 0x03C5, // pi     rho   sigma  tau    upsilon 
0x03C6, 0x03C7, 0x03C8, 0x03C9          // phi    chi   psi    omega    
};

#define CJK_HEAVENLY_STEM_CHARS_SIZE 10 
static const char16_t gCJKHeavenlyStemChars[CJK_HEAVENLY_STEM_CHARS_SIZE] =
{
0x7532, 0x4e59, 0x4e19, 0x4e01, 0x620a,
0x5df1, 0x5e9a, 0x8f9b, 0x58ec, 0x7678
};
#define CJK_EARTHLY_BRANCH_CHARS_SIZE 12 
static const char16_t gCJKEarthlyBranchChars[CJK_EARTHLY_BRANCH_CHARS_SIZE] =
{
0x5b50, 0x4e11, 0x5bc5, 0x536f, 0x8fb0, 0x5df3,
0x5348, 0x672a, 0x7533, 0x9149, 0x620c, 0x4ea5
};
#define HANGUL_CHARS_SIZE 14 
static const char16_t gHangulChars[HANGUL_CHARS_SIZE] =
{
0xac00, 0xb098, 0xb2e4, 0xb77c, 0xb9c8, 0xbc14,
0xc0ac, 0xc544, 0xc790, 0xcc28, 0xce74, 0xd0c0,
0xd30c, 0xd558
};
#define HANGUL_CONSONANT_CHARS_SIZE 14 
static const char16_t gHangulConsonantChars[HANGUL_CONSONANT_CHARS_SIZE] =
{                                      
0x3131, 0x3134, 0x3137, 0x3139, 0x3141, 0x3142,
0x3145, 0x3147, 0x3148, 0x314a, 0x314b, 0x314c,
0x314d, 0x314e
};

// Ge'ez set of Ethiopic ordered list. There are other locale-dependent sets.
// For the time being, let's implement two Ge'ez sets only
// per Momoi san's suggestion in bug 102252. 
// For details, refer to http://www.ethiopic.org/Collation/OrderedLists.html.
#define ETHIOPIC_HALEHAME_CHARS_SIZE 26
static const char16_t gEthiopicHalehameChars[ETHIOPIC_HALEHAME_CHARS_SIZE] =
{                                      
0x1200, 0x1208, 0x1210, 0x1218, 0x1220, 0x1228,
0x1230, 0x1240, 0x1260, 0x1270, 0x1280, 0x1290,
0x12a0, 0x12a8, 0x12c8, 0x12d0, 0x12d8, 0x12e8,
0x12f0, 0x1308, 0x1320, 0x1330, 0x1338, 0x1340,
0x1348, 0x1350
};
#define ETHIOPIC_HALEHAME_AM_CHARS_SIZE 33
static const char16_t gEthiopicHalehameAmChars[ETHIOPIC_HALEHAME_AM_CHARS_SIZE] =
{                                      
0x1200, 0x1208, 0x1210, 0x1218, 0x1220, 0x1228,
0x1230, 0x1238, 0x1240, 0x1260, 0x1270, 0x1278,
0x1280, 0x1290, 0x1298, 0x12a0, 0x12a8, 0x12b8,
0x12c8, 0x12d0, 0x12d8, 0x12e0, 0x12e8, 0x12f0,
0x1300, 0x1308, 0x1320, 0x1328, 0x1330, 0x1338,
0x1340, 0x1348, 0x1350
};
#define ETHIOPIC_HALEHAME_TI_ER_CHARS_SIZE 31
static const char16_t gEthiopicHalehameTiErChars[ETHIOPIC_HALEHAME_TI_ER_CHARS_SIZE] =
{                                      
0x1200, 0x1208, 0x1210, 0x1218, 0x1228, 0x1230,
0x1238, 0x1240, 0x1250, 0x1260, 0x1270, 0x1278,
0x1290, 0x1298, 0x12a0, 0x12a8, 0x12b8, 0x12c8,
0x12d0, 0x12d8, 0x12e0, 0x12e8, 0x12f0, 0x1300,
0x1308, 0x1320, 0x1328, 0x1330, 0x1338, 0x1348,
0x1350
};
#define ETHIOPIC_HALEHAME_TI_ET_CHARS_SIZE 34
static const char16_t gEthiopicHalehameTiEtChars[ETHIOPIC_HALEHAME_TI_ET_CHARS_SIZE] =
{                                      
0x1200, 0x1208, 0x1210, 0x1218, 0x1220, 0x1228,
0x1230, 0x1238, 0x1240, 0x1250, 0x1260, 0x1270,
0x1278, 0x1280, 0x1290, 0x1298, 0x12a0, 0x12a8,
0x12b8, 0x12c8, 0x12d0, 0x12d8, 0x12e0, 0x12e8,
0x12f0, 0x1300, 0x1308, 0x1320, 0x1328, 0x1330,
0x1338, 0x1340, 0x1348, 0x1350
};


// We know cjk-ideographic need 31 characters to display 99,999,999,999,999,999
// georgian needs 6 at most
// armenian needs 12 at most
// hebrew may need more...

#define NUM_BUF_SIZE 34 

static bool CharListToText(int32_t ordinal, nsString& result, const char16_t* chars, int32_t aBase)
{
  char16_t buf[NUM_BUF_SIZE];
  int32_t idx = NUM_BUF_SIZE;
  if (ordinal < 1) {
    return false;
  }
  do {
    ordinal--; // a == 0
    int32_t cur = ordinal % aBase;
    buf[--idx] = chars[cur];
    ordinal /= aBase ;
  } while ( ordinal > 0);
  result.Append(buf+idx,NUM_BUF_SIZE-idx);
  return true;
}

static const char16_t gCJKDecimalChars[10] =
{
  0x3007, 0x4e00, 0x4e8c, 0x4e09, 0x56db,
  0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
};
static bool CharListDecimalToText(int32_t ordinal, nsString& result, const char16_t* chars)
{
  if (ordinal < 0) {
    return false;
  }
  char16_t buf[NUM_BUF_SIZE];
  int32_t idx = NUM_BUF_SIZE;
  do {
    buf[--idx] = chars[ordinal % 10];
    ordinal /= 10;
  } while (ordinal > 0);
  result.Append(buf + idx, NUM_BUF_SIZE - idx);
  return true;
}

enum CJKIdeographicLang {
  CHINESE, KOREAN, JAPANESE
};
struct CJKIdeographicData {
  const char16_t *negative;
  char16_t digit[10];
  char16_t unit[3];
  char16_t unit10K[2];
  uint8_t lang;
  bool informal;
};
static const char16_t gJapaneseNegative[] = {
  0x30de, 0x30a4, 0x30ca, 0x30b9, 0x0000
};
static const CJKIdeographicData gDataJapaneseInformal = {
  gJapaneseNegative,          // negative
  {                           // digit
    0x3007, 0x4e00, 0x4e8c, 0x4e09, 0x56db,
    0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x5341, 0x767e, 0x5343 }, // unit
  { 0x4e07, 0x5104 },         // unit10K
  JAPANESE,                   // lang
  true                        // informal
};
static const CJKIdeographicData gDataJapaneseFormal = {
  gJapaneseNegative,          // negative
  {                           // digit
    0x96f6, 0x58f1, 0x5f10, 0x53c2, 0x56db,
    0x4f0d, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x62fe, 0x767e, 0x9621 }, // unit
  { 0x842c, 0x5104 },         // unit10K
  JAPANESE,                   // lang
  false                       // informal
};
static const char16_t gKoreanNegative[] = {
  0xb9c8, 0xc774, 0xb108, 0xc2a4, 0x0020, 0x0000
};
static const CJKIdeographicData gDataKoreanHangulFormal = {
  gKoreanNegative,            // negative
  {                           // digit
    0xc601, 0xc77c, 0xc774, 0xc0bc, 0xc0ac,
    0xc624, 0xc721, 0xce60, 0xd314, 0xad6c
  },
  { 0xc2ed, 0xbc31, 0xcc9c }, // unit
  { 0xb9cc, 0xc5b5 },         // unit10K
  KOREAN,                     // lang
  false                       // informal
};
static const CJKIdeographicData gDataKoreanHanjaInformal = {
  gKoreanNegative,            // negative
  {                           // digit
    0x96f6, 0x4e00, 0x4e8c, 0x4e09, 0x56db,
    0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x5341, 0x767e, 0x5343 }, // unit
  { 0x842c, 0x5104 },         // unit10K
  KOREAN,                     // lang
  true                        // informal
};
static const CJKIdeographicData gDataKoreanHanjaFormal = {
  gKoreanNegative,            // negative
  {                           // digit
    0x96f6, 0x58f9, 0x8cb3, 0x53c3, 0x56db,
    0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x62fe, 0x767e, 0x4edf }, // unit
  { 0x842c, 0x5104 },         // unit10K
  KOREAN,                     // lang
  false                       // informal
};
static const char16_t gSimpChineseNegative[] = {
  0x8d1f, 0x0000
};
static const CJKIdeographicData gDataSimpChineseInformal = {
  gSimpChineseNegative,       // negative
  {                           // digit
    0x96f6, 0x4e00, 0x4e8c, 0x4e09, 0x56db,
    0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x5341, 0x767e, 0x5343 }, // unit
  { 0x4e07, 0x4ebf },         // unit10K
  CHINESE,                    // lang
  true                        // informal
};
static const CJKIdeographicData gDataSimpChineseFormal = {
  gSimpChineseNegative,       // negative
  {                           // digit
    0x96f6, 0x58f9, 0x8d30, 0x53c1, 0x8086,
    0x4f0d, 0x9646, 0x67d2, 0x634c, 0x7396
  },
  { 0x62fe, 0x4f70, 0x4edf }, // unit
  { 0x4e07, 0x4ebf },         // unit10K
  CHINESE,                    // lang
  false                       // informal
};
static const char16_t gTradChineseNegative[] = {
  0x8ca0, 0x0000
};
static const CJKIdeographicData gDataTradChineseInformal = {
  gTradChineseNegative,       // negative
  {                           // digit
    0x96f6, 0x4e00, 0x4e8c, 0x4e09, 0x56db,
    0x4e94, 0x516d, 0x4e03, 0x516b, 0x4e5d
  },
  { 0x5341, 0x767e, 0x5343 }, // unit
  { 0x842c, 0x5104 },         // unit10K
  CHINESE,                    // lang
  true                        // informal
};
static const CJKIdeographicData gDataTradChineseFormal = {
  gTradChineseNegative,       // negative
  {                           // digit
    0x96f6, 0x58f9, 0x8cb3, 0x53c3, 0x8086,
    0x4f0d, 0x9678, 0x67d2, 0x634c, 0x7396
  },
  { 0x62fe, 0x4f70, 0x4edf }, // unit
  { 0x842c, 0x5104 },         // unit10K
  CHINESE,                    // lang
  false                       // informal
};

static const bool CJKIdeographicToText(int32_t aOrdinal, nsString& result,
                                       const CJKIdeographicData& data)
{
  char16_t buf[NUM_BUF_SIZE];
  int32_t idx = NUM_BUF_SIZE;
  int32_t pos = 0;
  bool isNegative = (aOrdinal < 0);
  bool needZero = (aOrdinal == 0);
  int32_t unitidx = 0, unit10Kidx = 0;
  uint32_t ordinal = mozilla::Abs(aOrdinal);
  do {
    unitidx = pos % 4;
    if (unitidx == 0) {
      unit10Kidx = pos / 4;
    }
    int32_t cur = ordinal % 10;
    if (cur == 0) {
      if (needZero) {
        needZero = false;
        buf[--idx] = data.digit[0];
      }
    } else {
      if (data.lang == CHINESE) {
        needZero = true;
      }
      if (unit10Kidx != 0) {
        if (data.lang == KOREAN && idx != NUM_BUF_SIZE) {
          buf[--idx] = ' ';
        }
        buf[--idx] = data.unit10K[unit10Kidx - 1];
      }
      if (unitidx != 0) {
        buf[--idx] = data.unit[unitidx - 1];
      }
      if (cur != 1) {
        buf[--idx] = data.digit[cur];
      } else {
        bool needOne = true;
        if (data.informal) {
          switch (data.lang) {
            case CHINESE:
              if (unitidx == 1 &&
                  (ordinal == 1 || (pos > 4 && ordinal % 1000 == 1))) {
                needOne = false;
              }
              break;
            case JAPANESE:
              if (unitidx > 0 &&
                  (unitidx != 3 || (pos == 3 && ordinal == 1))) {
                needOne = false;
              }
              break;
            case KOREAN:
              if (unitidx > 0 || (pos == 4 && (ordinal % 1000) == 1)) {
                needOne = false;
              }
              break;
          }
        }
        if (needOne) {
          buf[--idx] = data.digit[1];
        }
      }
      unit10Kidx = 0;
    }
    ordinal /= 10;
    pos++;
  } while (ordinal > 0);
  if (isNegative) {
    result.Append(data.negative);
  }
  result.Append(buf + idx, NUM_BUF_SIZE - idx);
  return true;
}

#define HEBREW_GERESH       0x05F3
static const char16_t gHebrewDigit[22] = 
{
//   1       2       3       4       5       6       7       8       9
0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7, 0x05D8,
//  10      20      30      40      50      60      70      80      90
0x05D9, 0x05DB, 0x05DC, 0x05DE, 0x05E0, 0x05E1, 0x05E2, 0x05E4, 0x05E6,
// 100     200     300     400
0x05E7, 0x05E8, 0x05E9, 0x05EA
};

static bool HebrewToText(int32_t ordinal, nsString& result)
{
  if (ordinal < 1 || ordinal > 999999) {
    return false;
  }
  bool outputSep = false;
  nsAutoString allText, thousandsGroup;
  do {
    thousandsGroup.Truncate();
    int32_t n3 = ordinal % 1000;
    // Process digit for 100 - 900
    for(int32_t n1 = 400; n1 > 0; )
    {
      if( n3 >= n1)
      {
        n3 -= n1;
        thousandsGroup.Append(gHebrewDigit[(n1/100)-1+18]);
      } else {
        n1 -= 100;
      } // if
    } // for

    // Process digit for 10 - 90
    int32_t n2;
    if( n3 >= 10 )
    {
      // Special process for 15 and 16
      if(( 15 == n3 ) || (16 == n3)) {
        // Special rule for religious reason...
        // 15 is represented by 9 and 6, not 10 and 5
        // 16 is represented by 9 and 7, not 10 and 6
        n2 = 9;
        thousandsGroup.Append(gHebrewDigit[ n2 - 1]);
      } else {
        n2 = n3 - (n3 % 10);
        thousandsGroup.Append(gHebrewDigit[(n2/10)-1+9]);
      } // if
      n3 -= n2;
    } // if
  
    // Process digit for 1 - 9 
    if ( n3 > 0)
      thousandsGroup.Append(gHebrewDigit[n3-1]);
    if (outputSep) 
      thousandsGroup.Append((char16_t)HEBREW_GERESH);
    if (allText.IsEmpty())
      allText = thousandsGroup;
    else
      allText = thousandsGroup + allText;
    ordinal /= 1000;
    outputSep = true;
  } while (ordinal >= 1);

  result.Append(allText);
  return true;
}


static bool ArmenianToText(int32_t ordinal, nsString& result)
{
  if (ordinal < 1 || ordinal > 9999) { // zero or reach the limit of Armenian numbering system
    return false;
  }

  char16_t buf[NUM_BUF_SIZE];
  int32_t idx = NUM_BUF_SIZE;
  int32_t d = 0;
  do {
    int32_t cur = ordinal % 10;
    if (cur > 0)
    {
      char16_t u = 0x0530 + (d * 9) + cur;
      buf[--idx] = u;
    }
    ++d;
    ordinal /= 10;
  } while (ordinal > 0);
  result.Append(buf + idx, NUM_BUF_SIZE - idx);
  return true;
}


static const char16_t gGeorgianValue [ 37 ] = { // 4 * 9 + 1 = 37
//      1       2       3       4       5       6       7       8       9
   0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10F1, 0x10D7,
//     10      20      30      40      50      60      70      80      90
   0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10F2, 0x10DD, 0x10DE, 0x10DF,
//    100     200     300     400     500     600     700     800     900
   0x10E0, 0x10E1, 0x10E2, 0x10F3, 0x10E4, 0x10E5, 0x10E6, 0x10E7, 0x10E8,
//   1000    2000    3000    4000    5000    6000    7000    8000    9000
   0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10F4, 0x10EF, 0x10F0,
//  10000
   0x10F5
};
static bool GeorgianToText(int32_t ordinal, nsString& result)
{
  if (ordinal < 1 || ordinal > 19999) { // zero or reach the limit of Georgian numbering system
    return false;
  }

  char16_t buf[NUM_BUF_SIZE];
  int32_t idx = NUM_BUF_SIZE;
  int32_t d = 0;
  do {
    int32_t cur = ordinal % 10;
    if (cur > 0)
    {
      char16_t u = gGeorgianValue[(d * 9 ) + ( cur - 1)];
      buf[--idx] = u;
    }
    ++d;
    ordinal /= 10;
  } while (ordinal > 0);
  result.Append(buf + idx, NUM_BUF_SIZE - idx);
  return true;
}

// Convert ordinal to Ethiopic numeric representation.
// The detail is available at http://www.ethiopic.org/Numerals/
// The algorithm used here is based on the pseudo-code put up there by
// Daniel Yacob <yacob@geez.org>.
// Another reference is Unicode 3.0 standard section 11.1.
#define ETHIOPIC_ONE             0x1369
#define ETHIOPIC_TEN             0x1372
#define ETHIOPIC_HUNDRED         0x137B
#define ETHIOPIC_TEN_THOUSAND    0x137C

static bool EthiopicToText(int32_t ordinal, nsString& result)
{
  if (ordinal < 1) {
    return false;
  }
  nsAutoString asciiNumberString;      // decimal string representation of ordinal
  DecimalToText(ordinal, asciiNumberString);
  uint8_t asciiStringLength = asciiNumberString.Length();

  // If number length is odd, add a leading "0"
  // the leading "0" preconditions the string to always have the
  // leading tens place populated, this avoids a check within the loop.
  // If we didn't add the leading "0", decrement asciiStringLength so
  // it will be equivalent to a zero-based index in both cases.
  if (asciiStringLength & 1) {
    asciiNumberString.Insert(NS_LITERAL_STRING("0"), 0);
  } else {
    asciiStringLength--;
  }

  // Iterate from the highest digits to lowest
  // indexFromLeft       indexes digits (0 = most significant)
  // groupIndexFromRight indexes pairs of digits (0 = least significant)
  for (uint8_t indexFromLeft = 0, groupIndexFromRight = asciiStringLength >> 1;
       indexFromLeft <= asciiStringLength;
       indexFromLeft += 2, groupIndexFromRight--) {
    uint8_t tensValue  = asciiNumberString.CharAt(indexFromLeft) & 0x0F;
    uint8_t unitsValue = asciiNumberString.CharAt(indexFromLeft + 1) & 0x0F;
    uint8_t groupValue = tensValue * 10 + unitsValue;

    bool oddGroup = (groupIndexFromRight & 1);

    // we want to clear ETHIOPIC_ONE when it is superfluous
    if (ordinal > 1 &&
        groupValue == 1 &&                  // one without a leading ten
        (oddGroup || indexFromLeft == 0)) { // preceding (100) or leading the sequence
      unitsValue = 0;
    }

    // put it all together...
    if (tensValue) {
      // map onto Ethiopic "tens":
      result.Append((char16_t) (tensValue +  ETHIOPIC_TEN - 1));
    }
    if (unitsValue) {
      //map onto Ethiopic "units":
      result.Append((char16_t) (unitsValue + ETHIOPIC_ONE - 1));
    }
    // Add a separator for all even groups except the last,
    // and for odd groups with non-zero value.
    if (oddGroup) {
      if (groupValue) {
        result.Append((char16_t) ETHIOPIC_HUNDRED);
      }
    } else {
      if (groupIndexFromRight) {
        result.Append((char16_t) ETHIOPIC_TEN_THOUSAND);
      }
    }
  }
  return true;
}


/* static */ void
nsBulletFrame::AppendCounterText(int32_t aListStyleType,
                                 int32_t aOrdinal,
                                 nsString& result,
                                 bool& isRTL)
{
  bool success = true;
  int32_t fallback = NS_STYLE_LIST_STYLE_DECIMAL;
  isRTL = false;
  
  switch (aListStyleType) {
    case NS_STYLE_LIST_STYLE_NONE: // used by counters code only
      break;

    case NS_STYLE_LIST_STYLE_DISC: // used by counters code only
      // XXX We really need to do this the same way we do list bullets.
      result.Append(char16_t(0x2022));
      break;

    case NS_STYLE_LIST_STYLE_CIRCLE: // used by counters code only
      // XXX We really need to do this the same way we do list bullets.
      result.Append(char16_t(0x25E6));
      break;

    case NS_STYLE_LIST_STYLE_SQUARE: // used by counters code only
      // XXX We really need to do this the same way we do list bullets.
      result.Append(char16_t(0x25FE));
      break;

    case NS_STYLE_LIST_STYLE_DECIMAL:
    default: // CSS2 say "A users  agent that does not recognize a numbering system
      // should use 'decimal'
      success = DecimalToText(aOrdinal, result);
      NS_ASSERTION(success, "DecimalToText must never fail");
      break;

    case NS_STYLE_LIST_STYLE_DECIMAL_LEADING_ZERO:
      success = DecimalLeadingZeroToText(aOrdinal, result);
      break;

    case NS_STYLE_LIST_STYLE_CJK_DECIMAL:
      success = CharListDecimalToText(aOrdinal, result, gCJKDecimalChars);
      break;

    case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
      success = RomanToText(aOrdinal, result,
                            gLowerRomanCharsA, gLowerRomanCharsB);
      break;
    case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
      success = RomanToText(aOrdinal, result,
                            gUpperRomanCharsA, gUpperRomanCharsB);
      break;

    case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
      success = CharListToText(aOrdinal, result, gLowerAlphaChars, ALPHA_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
      success = CharListToText(aOrdinal, result, gUpperAlphaChars, ALPHA_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_KATAKANA:
      success = CharListToText(aOrdinal, result, gKatakanaChars,
                               KATAKANA_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_HIRAGANA:
      success = CharListToText(aOrdinal, result, gHiraganaChars,
                               HIRAGANA_CHARS_SIZE);
      break;
    
    case NS_STYLE_LIST_STYLE_KATAKANA_IROHA:
      success = CharListToText(aOrdinal, result, gKatakanaIrohaChars,
                               KATAKANA_IROHA_CHARS_SIZE);
      break;
 
    case NS_STYLE_LIST_STYLE_HIRAGANA_IROHA:
      success = CharListToText(aOrdinal, result, gHiraganaIrohaChars,
                               HIRAGANA_IROHA_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_LOWER_GREEK:
      success = CharListToText(aOrdinal, result, gLowerGreekChars ,
                               LOWER_GREEK_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_CJK_IDEOGRAPHIC: 
    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_INFORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success =
        CJKIdeographicToText(aOrdinal, result, gDataTradChineseInformal);
      break;

    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_FORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CJKIdeographicToText(aOrdinal, result, gDataTradChineseFormal);
      break;

    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_INFORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success =
        CJKIdeographicToText(aOrdinal, result, gDataSimpChineseInformal);
      break;

    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_FORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CJKIdeographicToText(aOrdinal, result, gDataSimpChineseFormal);
      break;

    case NS_STYLE_LIST_STYLE_JAPANESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_INFORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CJKIdeographicToText(aOrdinal, result, gDataJapaneseInformal);
      break;

    case NS_STYLE_LIST_STYLE_JAPANESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_FORMAL: 
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CJKIdeographicToText(aOrdinal, result, gDataJapaneseFormal);
      break;

    case NS_STYLE_LIST_STYLE_KOREAN_HANGUL_FORMAL:
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success =
        CJKIdeographicToText(aOrdinal, result, gDataKoreanHangulFormal);
      break;

    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_INFORMAL:
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success =
        CJKIdeographicToText(aOrdinal, result, gDataKoreanHanjaInformal);
      break;

    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_FORMAL:
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CJKIdeographicToText(aOrdinal, result, gDataKoreanHanjaFormal);
      break;

    case NS_STYLE_LIST_STYLE_HEBREW: 
      isRTL = true;
      success = HebrewToText(aOrdinal, result);
      break;

    case NS_STYLE_LIST_STYLE_ARMENIAN: 
      success = ArmenianToText(aOrdinal, result);
      break;

    case NS_STYLE_LIST_STYLE_GEORGIAN: 
      success = GeorgianToText(aOrdinal, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_ARABIC_INDIC:
      success = OtherDecimalToText(aOrdinal, 0x0660, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_PERSIAN:
    case NS_STYLE_LIST_STYLE_MOZ_URDU:
      success = OtherDecimalToText(aOrdinal, 0x06f0, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_DEVANAGARI:
      success = OtherDecimalToText(aOrdinal, 0x0966, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_GURMUKHI:
      success = OtherDecimalToText(aOrdinal, 0x0a66, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_GUJARATI:
      success = OtherDecimalToText(aOrdinal, 0x0AE6, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_ORIYA:
      success = OtherDecimalToText(aOrdinal, 0x0B66, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_KANNADA:
      success = OtherDecimalToText(aOrdinal, 0x0CE6, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_MALAYALAM:
      success = OtherDecimalToText(aOrdinal, 0x0D66, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_THAI:
      success = OtherDecimalToText(aOrdinal, 0x0E50, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_LAO:
      success = OtherDecimalToText(aOrdinal, 0x0ED0, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_MYANMAR:
      success = OtherDecimalToText(aOrdinal, 0x1040, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_KHMER:
      success = OtherDecimalToText(aOrdinal, 0x17E0, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_BENGALI:
      success = OtherDecimalToText(aOrdinal, 0x09E6, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_TELUGU:
      success = OtherDecimalToText(aOrdinal, 0x0C66, result);
      break;
 
    case NS_STYLE_LIST_STYLE_MOZ_TAMIL:
      success = TamilToText(aOrdinal, result);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_CJK_HEAVENLY_STEM:
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CharListToText(aOrdinal, result, gCJKHeavenlyStemChars,
                               CJK_HEAVENLY_STEM_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_CJK_EARTHLY_BRANCH:
      fallback = NS_STYLE_LIST_STYLE_CJK_DECIMAL;
      success = CharListToText(aOrdinal, result, gCJKEarthlyBranchChars,
                               CJK_EARTHLY_BRANCH_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_HANGUL:
      success = CharListToText(aOrdinal, result, gHangulChars, HANGUL_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_HANGUL_CONSONANT:
      success = CharListToText(aOrdinal, result, gHangulConsonantChars,
                               HANGUL_CONSONANT_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME:
      success = CharListToText(aOrdinal, result, gEthiopicHalehameChars,
                               ETHIOPIC_HALEHAME_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_NUMERIC:
      success = EthiopicToText(aOrdinal, result);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_AM:
      success = CharListToText(aOrdinal, result, gEthiopicHalehameAmChars,
                               ETHIOPIC_HALEHAME_AM_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ER:
      success = CharListToText(aOrdinal, result, gEthiopicHalehameTiErChars,
                               ETHIOPIC_HALEHAME_TI_ER_CHARS_SIZE);
      break;

    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ET:
      success = CharListToText(aOrdinal, result, gEthiopicHalehameTiEtChars,
                               ETHIOPIC_HALEHAME_TI_ET_CHARS_SIZE);
      break;
  }
  if (!success) {
    AppendCounterText(fallback, aOrdinal, result, isRTL);
  }
}

/* static */ void
nsBulletFrame::GetListItemSuffix(int32_t aListStyleType,
                                 nsString& aResult)
{
  aResult.AssignLiteral(MOZ_UTF16(". "));

  switch (aListStyleType) {
    case NS_STYLE_LIST_STYLE_NONE: // used by counters code only
    case NS_STYLE_LIST_STYLE_DISC: // used by counters code only
    case NS_STYLE_LIST_STYLE_CIRCLE: // used by counters code only
    case NS_STYLE_LIST_STYLE_SQUARE: // used by counters code only
      aResult = ' ';
      break;

    case NS_STYLE_LIST_STYLE_CJK_DECIMAL:
    case NS_STYLE_LIST_STYLE_CJK_IDEOGRAPHIC:
    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_JAPANESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_JAPANESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_CJK_HEAVENLY_STEM:
    case NS_STYLE_LIST_STYLE_MOZ_CJK_EARTHLY_BRANCH:
      aResult = 0x3001;
      break;

    case NS_STYLE_LIST_STYLE_KOREAN_HANGUL_FORMAL:
    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_INFORMAL:
    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_HANGUL:
    case NS_STYLE_LIST_STYLE_MOZ_HANGUL_CONSONANT:
      aResult.AssignLiteral(MOZ_UTF16(", "));
      break;
  }
}

void
nsBulletFrame::GetListItemText(const nsStyleList& aListStyle,
                               nsString& result)
{
  NS_ASSERTION(aListStyle.mListStyleType != NS_STYLE_LIST_STYLE_NONE &&
               aListStyle.mListStyleType != NS_STYLE_LIST_STYLE_DISC &&
               aListStyle.mListStyleType != NS_STYLE_LIST_STYLE_CIRCLE &&
               aListStyle.mListStyleType != NS_STYLE_LIST_STYLE_SQUARE,
               "we should be using specialized code for these types");

  bool isRTL;
  nsAutoString number;
  AppendCounterText(aListStyle.mListStyleType, mOrdinal, number, isRTL);

  nsAutoString suffix;
  GetListItemSuffix(aListStyle.mListStyleType, suffix);

  result.Truncate();
  if (GetWritingMode().IsBidiLTR() != isRTL) {
    result.Append(number);
  } else {
    // RLM = 0x200f, LRM = 0x200e
    char16_t mark = isRTL ? 0x200f : 0x200e;
    result.Append(mark);
    result.Append(number);
    result.Append(mark);
  }
  result.Append(suffix);
}

#define MIN_BULLET_SIZE 1


void
nsBulletFrame::GetDesiredSize(nsPresContext*  aCX,
                              nsRenderingContext *aRenderingContext,
                              nsHTMLReflowMetrics& aMetrics,
                              float aFontSizeInflation)
{
  // Reset our padding.  If we need it, we'll set it below.
  mPadding.SizeTo(0, 0, 0, 0);
  
  const nsStyleList* myList = StyleList();
  nscoord ascent;

  RemoveStateBits(BULLET_FRAME_IMAGE_LOADING);

  if (myList->GetListStyleImage() && mImageRequest) {
    uint32_t status;
    mImageRequest->GetImageStatus(&status);
    if (status & imgIRequest::STATUS_SIZE_AVAILABLE &&
        !(status & imgIRequest::STATUS_ERROR)) {
      // auto size the image
      aMetrics.Width() = mIntrinsicSize.width;
      aMetrics.SetTopAscent(aMetrics.Height() = mIntrinsicSize.height);

      AddStateBits(BULLET_FRAME_IMAGE_LOADING);

      return;
    }
  }

  // If we're getting our desired size and don't have an image, reset
  // mIntrinsicSize to (0,0).  Otherwise, if we used to have an image, it
  // changed, and the new one is coming in, but we're reflowing before it's
  // fully there, we'll end up with mIntrinsicSize not matching our size, but
  // won't trigger a reflow in OnStartContainer (because mIntrinsicSize will
  // match the image size).
  mIntrinsicSize.SizeTo(0, 0);

  nsRefPtr<nsFontMetrics> fm;
  nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
                                        aFontSizeInflation);
  nscoord bulletSize;

  nsAutoString text;
  switch (myList->mListStyleType) {
    case NS_STYLE_LIST_STYLE_NONE:
      aMetrics.Width() = aMetrics.Height() = 0;
      aMetrics.SetTopAscent(0);
      break;

    case NS_STYLE_LIST_STYLE_DISC:
    case NS_STYLE_LIST_STYLE_CIRCLE:
    case NS_STYLE_LIST_STYLE_SQUARE: {
      ascent = fm->MaxAscent();
      bulletSize = std::max(nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
                          NSToCoordRound(0.8f * (float(ascent) / 2.0f)));
      mPadding.bottom = NSToCoordRound(float(ascent) / 8.0f);
      aMetrics.Width() = aMetrics.Height() = bulletSize;
      aMetrics.SetTopAscent(bulletSize + mPadding.bottom);

      // Add spacing to the padding
      nscoord halfEm = fm->EmHeight() / 2;
      WritingMode wm = GetWritingMode();
      if (wm.IsVertical()) {
        mPadding.bottom += halfEm;
      } else if (wm.IsBidiLTR()) {
        mPadding.right += halfEm;
      } else {
        mPadding.left += halfEm;
      }
      break;
    }

    default:
    case NS_STYLE_LIST_STYLE_DECIMAL_LEADING_ZERO:
    case NS_STYLE_LIST_STYLE_DECIMAL:
    case NS_STYLE_LIST_STYLE_CJK_DECIMAL:
    case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
    case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
    case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
    case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
    case NS_STYLE_LIST_STYLE_KATAKANA:
    case NS_STYLE_LIST_STYLE_HIRAGANA:
    case NS_STYLE_LIST_STYLE_KATAKANA_IROHA:
    case NS_STYLE_LIST_STYLE_HIRAGANA_IROHA:
    case NS_STYLE_LIST_STYLE_LOWER_GREEK:
    case NS_STYLE_LIST_STYLE_HEBREW: 
    case NS_STYLE_LIST_STYLE_ARMENIAN: 
    case NS_STYLE_LIST_STYLE_GEORGIAN: 
    case NS_STYLE_LIST_STYLE_CJK_IDEOGRAPHIC: 
    case NS_STYLE_LIST_STYLE_JAPANESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_JAPANESE_FORMAL:
    case NS_STYLE_LIST_STYLE_KOREAN_HANGUL_FORMAL:
    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_INFORMAL:
    case NS_STYLE_LIST_STYLE_KOREAN_HANJA_FORMAL:
    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_SIMP_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_INFORMAL:
    case NS_STYLE_LIST_STYLE_TRAD_CHINESE_FORMAL:
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_INFORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_SIMP_CHINESE_FORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_INFORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_TRAD_CHINESE_FORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_INFORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_JAPANESE_FORMAL: 
    case NS_STYLE_LIST_STYLE_MOZ_CJK_HEAVENLY_STEM:
    case NS_STYLE_LIST_STYLE_MOZ_CJK_EARTHLY_BRANCH:
    case NS_STYLE_LIST_STYLE_MOZ_ARABIC_INDIC:
    case NS_STYLE_LIST_STYLE_MOZ_PERSIAN:
    case NS_STYLE_LIST_STYLE_MOZ_URDU:
    case NS_STYLE_LIST_STYLE_MOZ_DEVANAGARI:
    case NS_STYLE_LIST_STYLE_MOZ_GURMUKHI:
    case NS_STYLE_LIST_STYLE_MOZ_GUJARATI:
    case NS_STYLE_LIST_STYLE_MOZ_ORIYA:
    case NS_STYLE_LIST_STYLE_MOZ_KANNADA:
    case NS_STYLE_LIST_STYLE_MOZ_MALAYALAM:
    case NS_STYLE_LIST_STYLE_MOZ_BENGALI:
    case NS_STYLE_LIST_STYLE_MOZ_TAMIL:
    case NS_STYLE_LIST_STYLE_MOZ_TELUGU:
    case NS_STYLE_LIST_STYLE_MOZ_THAI:
    case NS_STYLE_LIST_STYLE_MOZ_LAO:
    case NS_STYLE_LIST_STYLE_MOZ_MYANMAR:
    case NS_STYLE_LIST_STYLE_MOZ_KHMER:
    case NS_STYLE_LIST_STYLE_MOZ_HANGUL:
    case NS_STYLE_LIST_STYLE_MOZ_HANGUL_CONSONANT:
    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME:
    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_NUMERIC:
    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_AM:
    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ER:
    case NS_STYLE_LIST_STYLE_MOZ_ETHIOPIC_HALEHAME_TI_ET:
      GetListItemText(*myList, text);
      aMetrics.Height() = fm->MaxHeight();
      aRenderingContext->SetFont(fm);
      aMetrics.Width() =
        nsLayoutUtils::GetStringWidth(this, aRenderingContext,
                                      text.get(), text.Length());
      aMetrics.SetTopAscent(fm->MaxAscent());
      break;
  }
}

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

  float inflation = nsLayoutUtils::FontSizeInflationFor(this);
  SetFontSizeInflation(inflation);

  // Get the base size
  GetDesiredSize(aPresContext, aReflowState.rendContext, aMetrics, inflation);

  // Add in the border and padding; split the top/bottom between the
  // ascent and descent to make things look nice
  const nsMargin& borderPadding = aReflowState.ComputedPhysicalBorderPadding();
  mPadding.top += NSToCoordRound(borderPadding.top * inflation);
  mPadding.right += NSToCoordRound(borderPadding.right * inflation);
  mPadding.bottom += NSToCoordRound(borderPadding.bottom * inflation);
  mPadding.left += NSToCoordRound(borderPadding.left * inflation);
  aMetrics.Width() += mPadding.left + mPadding.right;
  aMetrics.Height() += mPadding.top + mPadding.bottom;
  aMetrics.SetTopAscent(aMetrics.TopAscent() + mPadding.top);

  // XXX this is a bit of a hack, we're assuming that no glyphs used for bullets
  // overflow their font-boxes. It'll do for now; to fix it for real, we really
  // should rewrite all the text-handling code here to use gfxTextRun (bug
  // 397294).
  aMetrics.SetOverflowAreasToDesiredBounds();

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

/* virtual */ nscoord
nsBulletFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
  nsHTMLReflowMetrics metrics(GetWritingMode());
  DISPLAY_MIN_WIDTH(this, metrics.Width());
  GetDesiredSize(PresContext(), aRenderingContext, metrics, 1.0f);
  return metrics.Width();
}

/* virtual */ nscoord
nsBulletFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
  nsHTMLReflowMetrics metrics(GetWritingMode());
  DISPLAY_PREF_WIDTH(this, metrics.Width());
  GetDesiredSize(PresContext(), aRenderingContext, metrics, 1.0f);
  return metrics.Width();
}

NS_IMETHODIMP
nsBulletFrame::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
{
  if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
    nsCOMPtr<imgIContainer> image;
    aRequest->GetImage(getter_AddRefs(image));
    return OnStartContainer(aRequest, image);
  }

  if (aType == imgINotificationObserver::FRAME_UPDATE) {
    // The image has changed.
    // Invalidate the entire content area. Maybe it's not optimal but it's simple and
    // always correct, and I'll be a stunned mullet if it ever matters for performance
    InvalidateFrame();
  }

  if (aType == imgINotificationObserver::IS_ANIMATED) {
    // Register the image request with the refresh driver now that we know it's
    // animated.
    if (aRequest == mImageRequest) {
      nsLayoutUtils::RegisterImageRequest(PresContext(), mImageRequest,
                                          &mRequestRegistered);
    }
  }

  return NS_OK;
}

nsresult nsBulletFrame::OnStartContainer(imgIRequest *aRequest,
                                         imgIContainer *aImage)
{
  if (!aImage) return NS_ERROR_INVALID_ARG;
  if (!aRequest) return NS_ERROR_INVALID_ARG;

  uint32_t status;
  aRequest->GetImageStatus(&status);
  if (status & imgIRequest::STATUS_ERROR) {
    return NS_OK;
  }
  
  nscoord w, h;
  aImage->GetWidth(&w);
  aImage->GetHeight(&h);

  nsPresContext* presContext = PresContext();

  nsSize newsize(nsPresContext::CSSPixelsToAppUnits(w),
                 nsPresContext::CSSPixelsToAppUnits(h));

  if (mIntrinsicSize != newsize) {
    mIntrinsicSize = newsize;

    // Now that the size is available (or an error occurred), trigger
    // a reflow of the bullet frame.
    nsIPresShell *shell = presContext->GetPresShell();
    if (shell) {
      shell->FrameNeedsReflow(this, nsIPresShell::eStyleChange,
                              NS_FRAME_IS_DIRTY);
    }
  }

  // Handle animations
  aImage->SetAnimationMode(presContext->ImageAnimationMode());
  // Ensure the animation (if any) is started. Note: There is no
  // corresponding call to Decrement for this. This Increment will be
  // 'cleaned up' by the Request when it is destroyed, but only then.
  aRequest->IncrementAnimationConsumers();
  
  return NS_OK;
}

void
nsBulletFrame::GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup)
{
  if (!aPresContext)
    return;

  NS_PRECONDITION(nullptr != aLoadGroup, "null OUT parameter pointer");

  nsIPresShell *shell = aPresContext->GetPresShell();

  if (!shell)
    return;

  nsIDocument *doc = shell->GetDocument();
  if (!doc)
    return;

  *aLoadGroup = doc->GetDocumentLoadGroup().take();
}

union VoidPtrOrFloat {
  VoidPtrOrFloat() : p(nullptr) {}

  void *p;
  float f;
};

float
nsBulletFrame::GetFontSizeInflation() const
{
  if (!HasFontSizeInflation()) {
    return 1.0f;
  }
  VoidPtrOrFloat u;
  u.p = Properties().Get(FontSizeInflationProperty());
  return u.f;
}

void
nsBulletFrame::SetFontSizeInflation(float aInflation)
{
  if (aInflation == 1.0f) {
    if (HasFontSizeInflation()) {
      RemoveStateBits(BULLET_FRAME_HAS_FONT_INFLATION);
      Properties().Delete(FontSizeInflationProperty());
    }
    return;
  }

  AddStateBits(BULLET_FRAME_HAS_FONT_INFLATION);
  VoidPtrOrFloat u;
  u.f = aInflation;
  Properties().Set(FontSizeInflationProperty(), u.p);
}

already_AddRefed<imgIContainer>
nsBulletFrame::GetImage() const
{
  if (mImageRequest && StyleList()->GetListStyleImage()) {
    nsCOMPtr<imgIContainer> imageCon;
    mImageRequest->GetImage(getter_AddRefs(imageCon));
    return imageCon.forget();
  }

  return nullptr;
}

nscoord
nsBulletFrame::GetBaseline() const
{
  nscoord ascent = 0, bottomPadding;
  if (GetStateBits() & BULLET_FRAME_IMAGE_LOADING) {
    ascent = GetRect().height;
  } else {
    nsRefPtr<nsFontMetrics> fm;
    nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
                                          GetFontSizeInflation());
    const nsStyleList* myList = StyleList();
    switch (myList->mListStyleType) {
      case NS_STYLE_LIST_STYLE_NONE:
        break;

      case NS_STYLE_LIST_STYLE_DISC:
      case NS_STYLE_LIST_STYLE_CIRCLE:
      case NS_STYLE_LIST_STYLE_SQUARE:
        ascent = fm->MaxAscent();
        bottomPadding = NSToCoordRound(float(ascent) / 8.0f);
        ascent = std::max(nsPresContext::CSSPixelsToAppUnits(MIN_BULLET_SIZE),
                        NSToCoordRound(0.8f * (float(ascent) / 2.0f)));
        ascent += bottomPadding;
        break;

      default:
        ascent = fm->MaxAscent();
        break;
    }
  }
  return ascent + GetUsedBorderAndPadding().top;
}








NS_IMPL_ISUPPORTS(nsBulletListener, imgINotificationObserver)

nsBulletListener::nsBulletListener() :
  mFrame(nullptr)
{
}

nsBulletListener::~nsBulletListener()
{
}

NS_IMETHODIMP
nsBulletListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
{
  if (!mFrame)
    return NS_ERROR_FAILURE;
  return mFrame->Notify(aRequest, aType, aData);
}