mirror of
https://github.com/classilla/tenfourfox.git
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677 lines
24 KiB
C++
677 lines
24 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsTextRunTransformations.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Move.h"
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#include "nsGkAtoms.h"
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#include "nsStyleConsts.h"
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#include "nsUnicharUtils.h"
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#include "nsUnicodeProperties.h"
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#include "nsSpecialCasingData.h"
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#include "mozilla/gfx/2D.h"
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#include "nsTextFrameUtils.h"
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#include "nsIPersistentProperties2.h"
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#include "GreekCasing.h"
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#include "IrishCasing.h"
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using namespace mozilla;
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// Unicode characters needing special casing treatment in tr/az languages
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#define LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE 0x0130
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#define LATIN_SMALL_LETTER_DOTLESS_I 0x0131
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// Greek sigma needs custom handling for the lowercase transform; for details
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// see comments under "case NS_STYLE_TEXT_TRANSFORM_LOWERCASE" within
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// nsCaseTransformTextRunFactory::RebuildTextRun(), and bug 740120.
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#define GREEK_CAPITAL_LETTER_SIGMA 0x03A3
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#define GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
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#define GREEK_SMALL_LETTER_SIGMA 0x03C3
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nsTransformedTextRun *
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nsTransformedTextRun::Create(const gfxTextRunFactory::Parameters* aParams,
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nsTransformingTextRunFactory* aFactory,
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gfxFontGroup* aFontGroup,
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const char16_t* aString, uint32_t aLength,
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const uint32_t aFlags,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles,
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bool aOwnsFactory)
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{
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NS_ASSERTION(!(aFlags & gfxTextRunFactory::TEXT_IS_8BIT),
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"didn't expect text to be marked as 8-bit here");
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void *storage = AllocateStorageForTextRun(sizeof(nsTransformedTextRun), aLength);
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if (!storage) {
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return nullptr;
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}
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return new (storage) nsTransformedTextRun(aParams, aFactory, aFontGroup,
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aString, aLength,
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aFlags, Move(aStyles),
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aOwnsFactory);
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}
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void
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nsTransformedTextRun::SetCapitalization(uint32_t aStart, uint32_t aLength,
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bool* aCapitalization,
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gfxContext* aRefContext)
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{
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if (mCapitalize.IsEmpty()) {
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if (!mCapitalize.AppendElements(GetLength()))
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return;
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memset(mCapitalize.Elements(), 0, GetLength()*sizeof(bool));
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}
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memcpy(mCapitalize.Elements() + aStart, aCapitalization, aLength*sizeof(bool));
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mNeedsRebuild = true;
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}
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bool
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nsTransformedTextRun::SetPotentialLineBreaks(uint32_t aStart, uint32_t aLength,
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uint8_t* aBreakBefore,
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gfxContext* aRefContext)
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{
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bool changed = gfxTextRun::SetPotentialLineBreaks(aStart, aLength,
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aBreakBefore, aRefContext);
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if (changed) {
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mNeedsRebuild = true;
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}
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return changed;
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}
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size_t
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nsTransformedTextRun::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
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{
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size_t total = gfxTextRun::SizeOfExcludingThis(aMallocSizeOf);
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total += mStyles.ShallowSizeOfExcludingThis(aMallocSizeOf);
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total += mCapitalize.ShallowSizeOfExcludingThis(aMallocSizeOf);
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if (mOwnsFactory) {
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total += aMallocSizeOf(mFactory);
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}
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return total;
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}
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size_t
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nsTransformedTextRun::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
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{
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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nsTransformedTextRun*
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nsTransformingTextRunFactory::MakeTextRun(const char16_t* aString, uint32_t aLength,
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const gfxTextRunFactory::Parameters* aParams,
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gfxFontGroup* aFontGroup, uint32_t aFlags,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles,
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bool aOwnsFactory)
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{
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return nsTransformedTextRun::Create(aParams, this, aFontGroup,
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aString, aLength, aFlags, Move(aStyles),
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aOwnsFactory);
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}
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nsTransformedTextRun*
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nsTransformingTextRunFactory::MakeTextRun(const uint8_t* aString, uint32_t aLength,
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const gfxTextRunFactory::Parameters* aParams,
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gfxFontGroup* aFontGroup, uint32_t aFlags,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles,
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bool aOwnsFactory)
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{
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// We'll only have a Unicode code path to minimize the amount of code needed
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// for these rarely used features
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NS_ConvertASCIItoUTF16 unicodeString(reinterpret_cast<const char*>(aString), aLength);
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return MakeTextRun(unicodeString.get(), aLength, aParams, aFontGroup,
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aFlags & ~(gfxFontGroup::TEXT_IS_PERSISTENT | gfxFontGroup::TEXT_IS_8BIT),
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Move(aStyles), aOwnsFactory);
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}
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void
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MergeCharactersInTextRun(gfxTextRun* aDest, gfxTextRun* aSrc,
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const bool* aCharsToMerge, const bool* aDeletedChars)
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{
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aDest->ResetGlyphRuns();
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gfxTextRun::GlyphRunIterator iter(aSrc, 0, aSrc->GetLength());
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uint32_t offset = 0;
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nsAutoTArray<gfxTextRun::DetailedGlyph,2> glyphs;
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while (iter.NextRun()) {
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gfxTextRun::GlyphRun* run = iter.GetGlyphRun();
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nsresult rv = aDest->AddGlyphRun(run->mFont, run->mMatchType,
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offset, false, run->mOrientation);
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if (NS_FAILED(rv))
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return;
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bool anyMissing = false;
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uint32_t mergeRunStart = iter.GetStringStart();
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const gfxTextRun::CompressedGlyph *srcGlyphs = aSrc->GetCharacterGlyphs();
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gfxTextRun::CompressedGlyph mergedGlyph = srcGlyphs[mergeRunStart];
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uint32_t stringEnd = iter.GetStringEnd();
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for (uint32_t k = iter.GetStringStart(); k < stringEnd; ++k) {
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const gfxTextRun::CompressedGlyph g = srcGlyphs[k];
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if (g.IsSimpleGlyph()) {
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if (!anyMissing) {
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gfxTextRun::DetailedGlyph details;
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details.mGlyphID = g.GetSimpleGlyph();
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details.mAdvance = g.GetSimpleAdvance();
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details.mXOffset = 0;
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details.mYOffset = 0;
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glyphs.AppendElement(details);
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}
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} else {
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if (g.IsMissing()) {
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anyMissing = true;
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glyphs.Clear();
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}
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if (g.GetGlyphCount() > 0) {
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glyphs.AppendElements(aSrc->GetDetailedGlyphs(k), g.GetGlyphCount());
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}
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}
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if (k + 1 < iter.GetStringEnd() && aCharsToMerge[k + 1]) {
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// next char is supposed to merge with current, so loop without
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// writing current merged glyph to the destination
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continue;
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}
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// If the start of the merge run is actually a character that should
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// have been merged with the previous character (this can happen
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// if there's a font change in the middle of a case-mapped character,
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// that decomposed into a sequence of base+diacritics, for example),
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// just discard the entire merge run. See comment at start of this
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// function.
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NS_WARN_IF_FALSE(!aCharsToMerge[mergeRunStart],
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"unable to merge across a glyph run boundary, "
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"glyph(s) discarded");
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if (!aCharsToMerge[mergeRunStart]) {
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if (anyMissing) {
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mergedGlyph.SetMissing(glyphs.Length());
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} else {
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mergedGlyph.SetComplex(mergedGlyph.IsClusterStart(),
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mergedGlyph.IsLigatureGroupStart(),
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glyphs.Length());
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}
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aDest->SetGlyphs(offset, mergedGlyph, glyphs.Elements());
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++offset;
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while (offset < aDest->GetLength() && aDeletedChars[offset]) {
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aDest->SetGlyphs(offset++, gfxTextRun::CompressedGlyph(), nullptr);
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}
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}
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glyphs.Clear();
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anyMissing = false;
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mergeRunStart = k + 1;
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if (mergeRunStart < stringEnd) {
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mergedGlyph = srcGlyphs[mergeRunStart];
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}
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}
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NS_ASSERTION(glyphs.Length() == 0,
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"Leftover glyphs, don't request merging of the last character with its next!");
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}
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NS_ASSERTION(offset == aDest->GetLength(), "Bad offset calculations");
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}
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gfxTextRunFactory::Parameters
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GetParametersForInner(nsTransformedTextRun* aTextRun, uint32_t* aFlags,
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gfxContext* aRefContext)
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{
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gfxTextRunFactory::Parameters params =
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{ aRefContext, nullptr, nullptr,
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nullptr, 0, aTextRun->GetAppUnitsPerDevUnit()
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};
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*aFlags = aTextRun->GetFlags() & ~gfxFontGroup::TEXT_IS_PERSISTENT;
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return params;
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}
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// Some languages have special casing conventions that differ from the
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// default Unicode mappings.
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// The enum values here are named for well-known exemplar languages that
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// exhibit the behavior in question; multiple lang tags may map to the
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// same setting here, if the behavior is shared by other languages.
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enum LanguageSpecificCasingBehavior {
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eLSCB_None, // default non-lang-specific behavior
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eLSCB_Dutch, // treat "ij" digraph as a unit for capitalization
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eLSCB_Greek, // strip accent when uppercasing Greek vowels
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eLSCB_Irish, // keep prefix letters as lowercase when uppercasing Irish
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eLSCB_Turkish // preserve dotted/dotless-i distinction in uppercase
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};
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static LanguageSpecificCasingBehavior
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GetCasingFor(const nsIAtom* aLang)
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{
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if (!aLang) {
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return eLSCB_None;
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}
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if (aLang == nsGkAtoms::tr ||
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aLang == nsGkAtoms::az ||
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aLang == nsGkAtoms::ba ||
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aLang == nsGkAtoms::crh ||
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aLang == nsGkAtoms::tt) {
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return eLSCB_Turkish;
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}
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if (aLang == nsGkAtoms::nl) {
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return eLSCB_Dutch;
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}
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if (aLang == nsGkAtoms::el) {
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return eLSCB_Greek;
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}
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if (aLang == nsGkAtoms::ga) {
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return eLSCB_Irish;
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}
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// Is there a region subtag we should ignore?
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nsAtomString langStr(const_cast<nsIAtom*>(aLang));
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int index = langStr.FindChar('-');
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if (index > 0) {
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langStr.Truncate(index);
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nsCOMPtr<nsIAtom> truncatedLang = do_GetAtom(langStr);
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return GetCasingFor(truncatedLang);
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}
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return eLSCB_None;
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}
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bool
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nsCaseTransformTextRunFactory::TransformString(
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const nsAString& aString,
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nsString& aConvertedString,
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bool aAllUppercase,
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const nsIAtom* aLanguage,
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nsTArray<bool>& aCharsToMergeArray,
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nsTArray<bool>& aDeletedCharsArray,
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nsTransformedTextRun* aTextRun,
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nsTArray<uint8_t>* aCanBreakBeforeArray,
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nsTArray<RefPtr<nsTransformedCharStyle>>* aStyleArray)
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{
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NS_PRECONDITION(!aTextRun || (aCanBreakBeforeArray && aStyleArray),
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"either none or all three optional parameters required");
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uint32_t length = aString.Length();
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const char16_t* str = aString.BeginReading();
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bool mergeNeeded = false;
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bool capitalizeDutchIJ = false;
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bool prevIsLetter = false;
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bool ntPrefix = false; // true immediately after a word-initial 'n' or 't'
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// when doing Irish lowercasing
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uint32_t sigmaIndex = uint32_t(-1);
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nsIUGenCategory::nsUGenCategory cat;
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uint8_t style = aAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE : 0;
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const nsIAtom* lang = aLanguage;
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LanguageSpecificCasingBehavior languageSpecificCasing = GetCasingFor(lang);
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mozilla::GreekCasing::State greekState;
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mozilla::IrishCasing::State irishState;
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uint32_t irishMark = uint32_t(-1); // location of possible prefix letter(s)
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// in the output string
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uint32_t irishMarkSrc; // corresponding location in source string (may differ
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// from output due to expansions like eszet -> 'SS')
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for (uint32_t i = 0; i < length; ++i) {
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uint32_t ch = str[i];
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RefPtr<nsTransformedCharStyle> charStyle;
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if (aTextRun) {
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charStyle = aTextRun->mStyles[i];
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style = aAllUppercase ? NS_STYLE_TEXT_TRANSFORM_UPPERCASE :
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charStyle->mTextTransform;
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nsIAtom* newLang = charStyle->mExplicitLanguage
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? charStyle->mLanguage : nullptr;
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if (lang != newLang) {
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lang = newLang;
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languageSpecificCasing = GetCasingFor(lang);
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greekState.Reset();
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irishState.Reset();
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irishMark = uint32_t(-1);
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}
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}
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int extraChars = 0;
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const mozilla::unicode::MultiCharMapping *mcm;
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bool inhibitBreakBefore = false; // have we just deleted preceding hyphen?
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if (NS_IS_HIGH_SURROGATE(ch) && i < length - 1 &&
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NS_IS_LOW_SURROGATE(str[i + 1])) {
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ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
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}
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switch (style) {
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case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
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if (languageSpecificCasing == eLSCB_Turkish) {
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if (ch == 'I') {
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ch = LATIN_SMALL_LETTER_DOTLESS_I;
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prevIsLetter = true;
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sigmaIndex = uint32_t(-1);
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break;
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}
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if (ch == LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE) {
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ch = 'i';
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prevIsLetter = true;
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sigmaIndex = uint32_t(-1);
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break;
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}
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}
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cat = mozilla::unicode::GetGenCategory(ch);
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if (languageSpecificCasing == eLSCB_Irish &&
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cat == nsIUGenCategory::kLetter) {
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// See bug 1018805 for Irish lowercasing requirements
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if (!prevIsLetter && (ch == 'n' || ch == 't')) {
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ntPrefix = true;
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} else {
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if (ntPrefix && mozilla::IrishCasing::IsUpperVowel(ch)) {
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aConvertedString.Append('-');
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++extraChars;
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}
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ntPrefix = false;
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}
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} else {
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ntPrefix = false;
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}
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// Special lowercasing behavior for Greek Sigma: note that this is listed
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// as context-sensitive in Unicode's SpecialCasing.txt, but is *not* a
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// language-specific mapping; it applies regardless of the language of
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// the element.
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//
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// The lowercase mapping for CAPITAL SIGMA should be to SMALL SIGMA (i.e.
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// the non-final form) whenever there is a following letter, or when the
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// CAPITAL SIGMA occurs in isolation (neither preceded nor followed by a
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// LETTER); and to FINAL SIGMA when it is preceded by another letter but
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// not followed by one.
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//
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// To implement the context-sensitive nature of this mapping, we keep
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// track of whether the previous character was a letter. If not, CAPITAL
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// SIGMA will map directly to SMALL SIGMA. If the previous character
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// was a letter, CAPITAL SIGMA maps to FINAL SIGMA and we record the
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// position in the converted string; if we then encounter another letter,
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// that FINAL SIGMA is replaced with a standard SMALL SIGMA.
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// If sigmaIndex is not -1, it marks where we have provisionally mapped
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// a CAPITAL SIGMA to FINAL SIGMA; if we now find another letter, we
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// need to change it to SMALL SIGMA.
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if (sigmaIndex != uint32_t(-1)) {
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if (cat == nsIUGenCategory::kLetter) {
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aConvertedString.SetCharAt(GREEK_SMALL_LETTER_SIGMA, sigmaIndex);
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}
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}
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if (ch == GREEK_CAPITAL_LETTER_SIGMA) {
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// If preceding char was a letter, map to FINAL instead of SMALL,
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// and note where it occurred by setting sigmaIndex; we'll change it
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// to standard SMALL SIGMA later if another letter follows
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if (prevIsLetter) {
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ch = GREEK_SMALL_LETTER_FINAL_SIGMA;
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sigmaIndex = aConvertedString.Length();
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} else {
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// CAPITAL SIGMA not preceded by a letter is unconditionally mapped
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// to SMALL SIGMA
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ch = GREEK_SMALL_LETTER_SIGMA;
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sigmaIndex = uint32_t(-1);
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}
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prevIsLetter = true;
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break;
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}
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// ignore diacritics for the purpose of contextual sigma mapping;
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// otherwise, reset prevIsLetter appropriately and clear the
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// sigmaIndex marker
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if (cat != nsIUGenCategory::kMark) {
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prevIsLetter = (cat == nsIUGenCategory::kLetter);
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sigmaIndex = uint32_t(-1);
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}
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mcm = mozilla::unicode::SpecialLower(ch);
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if (mcm) {
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int j = 0;
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while (j < 2 && mcm->mMappedChars[j + 1]) {
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aConvertedString.Append(mcm->mMappedChars[j]);
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++extraChars;
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++j;
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}
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ch = mcm->mMappedChars[j];
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break;
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}
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ch = ToLowerCase(ch);
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break;
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case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
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if (languageSpecificCasing == eLSCB_Turkish && ch == 'i') {
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ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
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break;
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}
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if (languageSpecificCasing == eLSCB_Greek) {
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ch = mozilla::GreekCasing::UpperCase(ch, greekState);
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break;
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}
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if (languageSpecificCasing == eLSCB_Irish) {
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bool mark;
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uint8_t action;
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ch = mozilla::IrishCasing::UpperCase(ch, irishState, mark, action);
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if (mark) {
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irishMark = aConvertedString.Length();
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irishMarkSrc = i;
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break;
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} else if (action) {
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nsString& str = aConvertedString; // shorthand
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switch (action) {
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case 1:
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// lowercase a single prefix letter
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NS_ASSERTION(str.Length() > 0 && irishMark < str.Length(),
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"bad irishMark!");
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str.SetCharAt(ToLowerCase(str[irishMark]), irishMark);
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irishMark = uint32_t(-1);
|
|
break;
|
|
case 2:
|
|
// lowercase two prefix letters (immediately before current pos)
|
|
NS_ASSERTION(str.Length() >= 2 && irishMark == str.Length() - 2,
|
|
"bad irishMark!");
|
|
str.SetCharAt(ToLowerCase(str[irishMark]), irishMark);
|
|
str.SetCharAt(ToLowerCase(str[irishMark + 1]), irishMark + 1);
|
|
irishMark = uint32_t(-1);
|
|
break;
|
|
case 3:
|
|
// lowercase one prefix letter, and delete following hyphen
|
|
// (which must be the immediately-preceding char)
|
|
NS_ASSERTION(str.Length() >= 2 && irishMark == str.Length() - 2,
|
|
"bad irishMark!");
|
|
str.Replace(irishMark, 2, ToLowerCase(str[irishMark]));
|
|
aDeletedCharsArray[irishMarkSrc + 1] = true;
|
|
// Remove the trailing entries (corresponding to the deleted hyphen)
|
|
// from the auxiliary arrays.
|
|
aCharsToMergeArray.SetLength(aCharsToMergeArray.Length() - 1);
|
|
if (aTextRun) {
|
|
aStyleArray->SetLength(aStyleArray->Length() - 1);
|
|
aCanBreakBeforeArray->SetLength(aCanBreakBeforeArray->Length() - 1);
|
|
inhibitBreakBefore = true;
|
|
}
|
|
mergeNeeded = true;
|
|
irishMark = uint32_t(-1);
|
|
break;
|
|
}
|
|
// ch has been set to the uppercase for current char;
|
|
// No need to check for SpecialUpper here as none of the characters
|
|
// that could trigger an Irish casing action have special mappings.
|
|
break;
|
|
}
|
|
// If we didn't have any special action to perform, fall through
|
|
// to check for special uppercase (ß)
|
|
}
|
|
|
|
mcm = mozilla::unicode::SpecialUpper(ch);
|
|
if (mcm) {
|
|
int j = 0;
|
|
while (j < 2 && mcm->mMappedChars[j + 1]) {
|
|
aConvertedString.Append(mcm->mMappedChars[j]);
|
|
++extraChars;
|
|
++j;
|
|
}
|
|
ch = mcm->mMappedChars[j];
|
|
break;
|
|
}
|
|
|
|
ch = ToUpperCase(ch);
|
|
break;
|
|
|
|
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
|
|
if (aTextRun) {
|
|
if (capitalizeDutchIJ && ch == 'j') {
|
|
ch = 'J';
|
|
capitalizeDutchIJ = false;
|
|
break;
|
|
}
|
|
capitalizeDutchIJ = false;
|
|
if (i < aTextRun->mCapitalize.Length() && aTextRun->mCapitalize[i]) {
|
|
if (languageSpecificCasing == eLSCB_Turkish && ch == 'i') {
|
|
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
|
|
break;
|
|
}
|
|
if (languageSpecificCasing == eLSCB_Dutch && ch == 'i') {
|
|
ch = 'I';
|
|
capitalizeDutchIJ = true;
|
|
break;
|
|
}
|
|
|
|
mcm = mozilla::unicode::SpecialTitle(ch);
|
|
if (mcm) {
|
|
int j = 0;
|
|
while (j < 2 && mcm->mMappedChars[j + 1]) {
|
|
aConvertedString.Append(mcm->mMappedChars[j]);
|
|
++extraChars;
|
|
++j;
|
|
}
|
|
ch = mcm->mMappedChars[j];
|
|
break;
|
|
}
|
|
|
|
ch = ToTitleCase(ch);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case NS_STYLE_TEXT_TRANSFORM_FULLWIDTH:
|
|
ch = mozilla::unicode::GetFullWidth(ch);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (ch == uint32_t(-1)) {
|
|
aDeletedCharsArray.AppendElement(true);
|
|
mergeNeeded = true;
|
|
} else {
|
|
aDeletedCharsArray.AppendElement(false);
|
|
aCharsToMergeArray.AppendElement(false);
|
|
if (aTextRun) {
|
|
aStyleArray->AppendElement(charStyle);
|
|
aCanBreakBeforeArray->AppendElement(
|
|
inhibitBreakBefore ? gfxShapedText::CompressedGlyph::FLAG_BREAK_TYPE_NONE
|
|
: aTextRun->CanBreakBefore(i));
|
|
}
|
|
|
|
if (IS_IN_BMP(ch)) {
|
|
aConvertedString.Append(ch);
|
|
} else {
|
|
aConvertedString.Append(H_SURROGATE(ch));
|
|
aConvertedString.Append(L_SURROGATE(ch));
|
|
++i;
|
|
aDeletedCharsArray.AppendElement(true); // not exactly deleted, but the
|
|
// trailing surrogate is skipped
|
|
++extraChars;
|
|
}
|
|
|
|
while (extraChars-- > 0) {
|
|
mergeNeeded = true;
|
|
aCharsToMergeArray.AppendElement(true);
|
|
if (aTextRun) {
|
|
aStyleArray->AppendElement(charStyle);
|
|
aCanBreakBeforeArray->AppendElement(
|
|
gfxShapedText::CompressedGlyph::FLAG_BREAK_TYPE_NONE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return mergeNeeded;
|
|
}
|
|
|
|
void
|
|
nsCaseTransformTextRunFactory::RebuildTextRun(nsTransformedTextRun* aTextRun,
|
|
gfxContext* aRefContext, gfxMissingFontRecorder *aMFR)
|
|
{
|
|
nsAutoString convertedString;
|
|
nsAutoTArray<bool,50> charsToMergeArray;
|
|
nsAutoTArray<bool,50> deletedCharsArray;
|
|
nsAutoTArray<uint8_t,50> canBreakBeforeArray;
|
|
nsAutoTArray<RefPtr<nsTransformedCharStyle>,50> styleArray;
|
|
|
|
bool mergeNeeded = TransformString(aTextRun->mString,
|
|
convertedString,
|
|
mAllUppercase,
|
|
nullptr,
|
|
charsToMergeArray,
|
|
deletedCharsArray,
|
|
aTextRun,
|
|
&canBreakBeforeArray,
|
|
&styleArray);
|
|
|
|
uint32_t flags;
|
|
gfxTextRunFactory::Parameters innerParams =
|
|
GetParametersForInner(aTextRun, &flags, aRefContext);
|
|
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
|
|
|
|
nsAutoPtr<nsTransformedTextRun> transformedChild;
|
|
nsAutoPtr<gfxTextRun> cachedChild;
|
|
gfxTextRun* child;
|
|
|
|
if (mInnerTransformingTextRunFactory) {
|
|
transformedChild = mInnerTransformingTextRunFactory->MakeTextRun(
|
|
convertedString.BeginReading(), convertedString.Length(),
|
|
&innerParams, fontGroup, flags, Move(styleArray), false);
|
|
child = transformedChild.get();
|
|
} else {
|
|
cachedChild = fontGroup->MakeTextRun(
|
|
convertedString.BeginReading(), convertedString.Length(),
|
|
&innerParams, flags, aMFR);
|
|
child = cachedChild.get();
|
|
}
|
|
if (!child)
|
|
return;
|
|
// Copy potential linebreaks into child so they're preserved
|
|
// (and also child will be shaped appropriately)
|
|
NS_ASSERTION(convertedString.Length() == canBreakBeforeArray.Length(),
|
|
"Dropped characters or break-before values somewhere!");
|
|
child->SetPotentialLineBreaks(0, canBreakBeforeArray.Length(),
|
|
canBreakBeforeArray.Elements(), aRefContext);
|
|
if (transformedChild) {
|
|
transformedChild->FinishSettingProperties(aRefContext, aMFR);
|
|
}
|
|
|
|
if (mergeNeeded) {
|
|
// Now merge multiple characters into one multi-glyph character as required
|
|
// and deal with skipping deleted accent chars
|
|
NS_ASSERTION(charsToMergeArray.Length() == child->GetLength(),
|
|
"source length mismatch");
|
|
NS_ASSERTION(deletedCharsArray.Length() == aTextRun->GetLength(),
|
|
"destination length mismatch");
|
|
MergeCharactersInTextRun(aTextRun, child, charsToMergeArray.Elements(),
|
|
deletedCharsArray.Elements());
|
|
} else {
|
|
// No merging to do, so just copy; this produces a more optimized textrun.
|
|
// We can't steal the data because the child may be cached and stealing
|
|
// the data would break the cache.
|
|
aTextRun->ResetGlyphRuns();
|
|
aTextRun->CopyGlyphDataFrom(child, 0, child->GetLength(), 0);
|
|
}
|
|
}
|