forked from mirrors/gecko-dev
940 lines
38 KiB
C++
940 lines
38 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 <utility>
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#include "GreekCasing.h"
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#include "IrishCasing.h"
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#include "MathMLTextRunFactory.h"
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#include "mozilla/ComputedStyleInlines.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/StaticPrefs_layout.h"
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#include "mozilla/StaticPrefs_mathml.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/gfx/2D.h"
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#include "nsGkAtoms.h"
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#include "nsSpecialCasingData.h"
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#include "nsStyleConsts.h"
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#include "nsTextFrameUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsUnicodeProperties.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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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 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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already_AddRefed<nsTransformedTextRun> nsTransformedTextRun::Create(
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const gfxTextRunFactory::Parameters* aParams,
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nsTransformingTextRunFactory* aFactory, gfxFontGroup* aFontGroup,
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const char16_t* aString, uint32_t aLength,
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const gfx::ShapedTextFlags aFlags, const nsTextFrameUtils::Flags aFlags2,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles, bool aOwnsFactory) {
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NS_ASSERTION(!(aFlags & gfx::ShapedTextFlags::TEXT_IS_8BIT),
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"didn't expect text to be marked as 8-bit here");
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void* storage =
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AllocateStorageForTextRun(sizeof(nsTransformedTextRun), aLength);
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if (!storage) {
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return nullptr;
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}
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RefPtr<nsTransformedTextRun> result = new (storage)
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nsTransformedTextRun(aParams, aFactory, aFontGroup, aString, aLength,
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aFlags, aFlags2, std::move(aStyles), aOwnsFactory);
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return result.forget();
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}
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void nsTransformedTextRun::SetCapitalization(uint32_t aStart, uint32_t aLength,
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bool* aCapitalization) {
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if (mCapitalize.IsEmpty()) {
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// XXX(Bug 1631371) Check if this should use a fallible operation as it
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// pretended earlier.
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mCapitalize.AppendElements(GetLength());
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memset(mCapitalize.Elements(), 0, GetLength() * sizeof(bool));
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}
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memcpy(mCapitalize.Elements() + aStart, aCapitalization,
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aLength * sizeof(bool));
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mNeedsRebuild = true;
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}
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bool nsTransformedTextRun::SetPotentialLineBreaks(Range aRange,
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const uint8_t* aBreakBefore) {
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bool changed = gfxTextRun::SetPotentialLineBreaks(aRange, aBreakBefore);
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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 nsTransformedTextRun::SizeOfExcludingThis(
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mozilla::MallocSizeOf aMallocSizeOf) {
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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 nsTransformedTextRun::SizeOfIncludingThis(
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mozilla::MallocSizeOf aMallocSizeOf) {
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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already_AddRefed<nsTransformedTextRun>
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nsTransformingTextRunFactory::MakeTextRun(
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const char16_t* aString, uint32_t aLength,
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const gfxTextRunFactory::Parameters* aParams, gfxFontGroup* aFontGroup,
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gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles, bool aOwnsFactory) {
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return nsTransformedTextRun::Create(aParams, this, aFontGroup, aString,
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aLength, aFlags, aFlags2,
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std::move(aStyles), aOwnsFactory);
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}
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already_AddRefed<nsTransformedTextRun>
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nsTransformingTextRunFactory::MakeTextRun(
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const uint8_t* aString, uint32_t aLength,
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const gfxTextRunFactory::Parameters* aParams, gfxFontGroup* aFontGroup,
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gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2,
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nsTArray<RefPtr<nsTransformedCharStyle>>&& aStyles, bool aOwnsFactory) {
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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),
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aLength);
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return MakeTextRun(unicodeString.get(), aLength, aParams, aFontGroup,
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aFlags & ~gfx::ShapedTextFlags::TEXT_IS_8BIT, aFlags2,
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std::move(aStyles), aOwnsFactory);
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}
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void MergeCharactersInTextRun(gfxTextRun* aDest, gfxTextRun* aSrc,
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const bool* aCharsToMerge,
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const bool* aDeletedChars) {
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MOZ_ASSERT(!aDest->TrailingGlyphRun(), "unexpected glyphRuns in aDest!");
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uint32_t offset = 0;
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AutoTArray<gfxTextRun::DetailedGlyph, 2> glyphs;
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const gfxTextRun::CompressedGlyph continuationGlyph =
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gfxTextRun::CompressedGlyph::MakeComplex(false, false);
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const gfxTextRun::CompressedGlyph* srcGlyphs = aSrc->GetCharacterGlyphs();
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gfxTextRun::CompressedGlyph* destGlyphs = aDest->GetCharacterGlyphs();
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for (gfxTextRun::GlyphRunIterator iter(aSrc, gfxTextRun::Range(aSrc));
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!iter.AtEnd(); iter.NextRun()) {
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const gfxTextRun::GlyphRun* run = iter.GlyphRun();
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aDest->AddGlyphRun(run->mFont, run->mMatchType, offset, false,
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run->mOrientation, run->mIsCJK);
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bool anyMissing = false;
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uint32_t mergeRunStart = iter.StringStart();
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// Initialize to a copy of the first source glyph in the merge run.
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gfxTextRun::CompressedGlyph mergedGlyph = srcGlyphs[mergeRunStart];
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uint32_t stringEnd = iter.StringEnd();
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for (uint32_t k = iter.StringStart(); 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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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.StringEnd() && 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_WARNING_ASSERTION(
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!aCharsToMerge[mergeRunStart],
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"unable to merge across a glyph run boundary, glyph(s) discarded");
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if (!aCharsToMerge[mergeRunStart]) {
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// Determine if we can just copy the existing simple glyph record.
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if (mergedGlyph.IsSimpleGlyph() && glyphs.Length() == 1) {
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destGlyphs[offset] = mergedGlyph;
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} else {
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// Otherwise set up complex glyph record and store detailed glyphs.
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mergedGlyph.SetComplex(mergedGlyph.IsClusterStart(),
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mergedGlyph.IsLigatureGroupStart());
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destGlyphs[offset] = mergedGlyph;
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aDest->SetDetailedGlyphs(offset, glyphs.Length(), glyphs.Elements());
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if (anyMissing) {
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destGlyphs[offset].SetMissing();
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}
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}
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offset++;
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while (offset < aDest->GetLength() && aDeletedChars[offset]) {
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destGlyphs[offset++] = continuationGlyph;
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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 "
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"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 GetParametersForInner(
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nsTransformedTextRun* aTextRun, gfx::ShapedTextFlags* aFlags,
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DrawTarget* aRefDrawTarget) {
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gfxTextRunFactory::Parameters params = {
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aRefDrawTarget, nullptr, nullptr,
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nullptr, 0, aTextRun->GetAppUnitsPerDevUnit()};
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*aFlags = aTextRun->GetFlags();
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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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eLSCB_Lithuanian // retain dot on lowercase i/j when an accent is present
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};
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static LanguageSpecificCasingBehavior GetCasingFor(const nsAtom* aLang) {
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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 || aLang == nsGkAtoms::az ||
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aLang == nsGkAtoms::ba || 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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if (aLang == nsGkAtoms::lt_) {
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return eLSCB_Lithuanian;
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}
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// Is there a region subtag we should ignore?
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nsAtomString langStr(const_cast<nsAtom*>(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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RefPtr<nsAtom> truncatedLang = NS_Atomize(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 nsCaseTransformTextRunFactory::TransformString(
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const nsAString& aString, nsString& aConvertedString,
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const Maybe<StyleTextTransform>& aGlobalTransform, char16_t aMaskChar,
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bool aCaseTransformsOnly, const nsAtom* aLanguage,
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nsTArray<bool>& aCharsToMergeArray, nsTArray<bool>& aDeletedCharsArray,
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const nsTransformedTextRun* aTextRun, uint32_t aOffsetInTextRun,
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nsTArray<uint8_t>* aCanBreakBeforeArray,
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nsTArray<RefPtr<nsTransformedCharStyle>>* aStyleArray) {
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bool auxiliaryOutputArrays = aCanBreakBeforeArray && aStyleArray;
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MOZ_ASSERT(!auxiliaryOutputArrays || aTextRun,
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"text run must be provided to use aux output arrays");
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uint32_t length = aString.Length();
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const char16_t* str = aString.BeginReading();
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// If an unconditional mask character was passed, we'll use it; if not, any
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// masking called for by the textrun styles will use TextEditor's mask char.
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const char16_t mask = aMaskChar ? aMaskChar : TextEditor::PasswordMask();
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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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bool seenSoftDotted = false; // true immediately after an I or J that is
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// converted to lowercase in Lithuanian mode
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uint32_t sigmaIndex = uint32_t(-1);
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nsUGenCategory cat;
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StyleTextTransform style =
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aGlobalTransform.valueOr(StyleTextTransform::None());
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bool forceNonFullWidth = false;
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const nsAtom* 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 = uint32_t(-1); // corresponding location in source
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// string (may differ from output due
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// to expansions like eszet -> 'SS')
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uint32_t greekMark = uint32_t(-1); // location of uppercase ETA that may need
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// tonos added (if it is disjunctive eta)
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const char16_t kGreekUpperEta = 0x0397;
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for (uint32_t i = 0; i < length; ++i, ++aOffsetInTextRun) {
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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[aOffsetInTextRun];
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style = aGlobalTransform.valueOr(charStyle->mTextTransform);
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forceNonFullWidth = charStyle->mForceNonFullWidth;
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nsAtom* newLang =
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charStyle->mExplicitLanguage ? charStyle->mLanguage.get() : 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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irishMarkSrc = uint32_t(-1);
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greekMark = uint32_t(-1);
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}
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}
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// These should be mutually exclusive: mMaskPassword is set if we are
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// handling <input type=password>, where the TextEditor code controls
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// masking and we use its PasswordMask() character, in which case
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// aMaskChar (from -webkit-text-security) is not used.
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MOZ_ASSERT_IF(aMaskChar, !(charStyle && charStyle->mMaskPassword));
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bool maskPassword = (charStyle && charStyle->mMaskPassword) || aMaskChar;
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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 (i < length - 1 && NS_IS_SURROGATE_PAIR(ch, str[i + 1])) {
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ch = SURROGATE_TO_UCS4(ch, str[i + 1]);
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}
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const uint32_t originalCh = ch;
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// Skip case transform if we're masking current character.
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if (!maskPassword) {
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switch (style.case_) {
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case StyleTextTransformCase::None:
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break;
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case StyleTextTransformCase::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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if (languageSpecificCasing == eLSCB_Lithuanian) {
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// clang-format off
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/* From SpecialCasing.txt:
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* # Introduce an explicit dot above when lowercasing capital I's and J's
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* # whenever there are more accents above.
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* # (of the accents used in Lithuanian: grave, acute, tilde above, and ogonek)
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*
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* 0049; 0069 0307; 0049; 0049; lt More_Above; # LATIN CAPITAL LETTER I
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* 004A; 006A 0307; 004A; 004A; lt More_Above; # LATIN CAPITAL LETTER J
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* 012E; 012F 0307; 012E; 012E; lt More_Above; # LATIN CAPITAL LETTER I WITH OGONEK
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* 00CC; 0069 0307 0300; 00CC; 00CC; lt; # LATIN CAPITAL LETTER I WITH GRAVE
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* 00CD; 0069 0307 0301; 00CD; 00CD; lt; # LATIN CAPITAL LETTER I WITH ACUTE
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* 0128; 0069 0307 0303; 0128; 0128; lt; # LATIN CAPITAL LETTER I WITH TILDE
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*/
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// clang-format on
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if (ch == 'I' || ch == 'J' || ch == 0x012E) {
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ch = ToLowerCase(ch);
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prevIsLetter = true;
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seenSoftDotted = true;
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sigmaIndex = uint32_t(-1);
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break;
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}
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if (ch == 0x00CC) {
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aConvertedString.Append('i');
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aConvertedString.Append(0x0307);
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extraChars += 2;
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ch = 0x0300;
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prevIsLetter = true;
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seenSoftDotted = false;
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sigmaIndex = uint32_t(-1);
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break;
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}
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if (ch == 0x00CD) {
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aConvertedString.Append('i');
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aConvertedString.Append(0x0307);
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extraChars += 2;
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ch = 0x0301;
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prevIsLetter = true;
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seenSoftDotted = false;
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sigmaIndex = uint32_t(-1);
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break;
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}
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if (ch == 0x0128) {
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aConvertedString.Append('i');
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aConvertedString.Append(0x0307);
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extraChars += 2;
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ch = 0x0303;
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prevIsLetter = true;
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seenSoftDotted = false;
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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 == nsUGenCategory::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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}
|
|
ntPrefix = false;
|
|
}
|
|
} else {
|
|
ntPrefix = false;
|
|
}
|
|
|
|
if (seenSoftDotted && cat == nsUGenCategory::kMark) {
|
|
// The seenSoftDotted flag will only be set in Lithuanian mode.
|
|
if (ch == 0x0300 || ch == 0x0301 || ch == 0x0303) {
|
|
aConvertedString.Append(0x0307);
|
|
++extraChars;
|
|
}
|
|
}
|
|
seenSoftDotted = false;
|
|
|
|
// Special lowercasing behavior for Greek Sigma: note that this is
|
|
// listed as context-sensitive in Unicode's SpecialCasing.txt, but is
|
|
// *not* a language-specific mapping; it applies regardless of the
|
|
// language of the element.
|
|
//
|
|
// The lowercase mapping for CAPITAL SIGMA should be to SMALL SIGMA
|
|
// (i.e. the non-final form) whenever there is a following letter, or
|
|
// when the CAPITAL SIGMA occurs in isolation (neither preceded nor
|
|
// followed by a LETTER); and to FINAL SIGMA when it is preceded by
|
|
// another letter but not followed by one.
|
|
//
|
|
// To implement the context-sensitive nature of this mapping, we keep
|
|
// track of whether the previous character was a letter. If not,
|
|
// CAPITAL SIGMA will map directly to SMALL SIGMA. If the previous
|
|
// character was a letter, CAPITAL SIGMA maps to FINAL SIGMA and we
|
|
// record the position in the converted string; if we then encounter
|
|
// another letter, that FINAL SIGMA is replaced with a standard
|
|
// SMALL SIGMA.
|
|
|
|
// If sigmaIndex is not -1, it marks where we have provisionally
|
|
// mapped a CAPITAL SIGMA to FINAL SIGMA; if we now find another
|
|
// letter, we need to change it to SMALL SIGMA.
|
|
if (sigmaIndex != uint32_t(-1)) {
|
|
if (cat == nsUGenCategory::kLetter) {
|
|
aConvertedString.SetCharAt(GREEK_SMALL_LETTER_SIGMA, sigmaIndex);
|
|
}
|
|
}
|
|
|
|
if (ch == GREEK_CAPITAL_LETTER_SIGMA) {
|
|
// If preceding char was a letter, map to FINAL instead of SMALL,
|
|
// and note where it occurred by setting sigmaIndex; we'll change
|
|
// it to standard SMALL SIGMA later if another letter follows
|
|
if (prevIsLetter) {
|
|
ch = GREEK_SMALL_LETTER_FINAL_SIGMA;
|
|
sigmaIndex = aConvertedString.Length();
|
|
} else {
|
|
// CAPITAL SIGMA not preceded by a letter is unconditionally
|
|
// mapped to SMALL SIGMA
|
|
ch = GREEK_SMALL_LETTER_SIGMA;
|
|
sigmaIndex = uint32_t(-1);
|
|
}
|
|
prevIsLetter = true;
|
|
break;
|
|
}
|
|
|
|
// ignore diacritics for the purpose of contextual sigma mapping;
|
|
// otherwise, reset prevIsLetter appropriately and clear the
|
|
// sigmaIndex marker
|
|
if (cat != nsUGenCategory::kMark) {
|
|
prevIsLetter = (cat == nsUGenCategory::kLetter);
|
|
sigmaIndex = uint32_t(-1);
|
|
}
|
|
|
|
mcm = mozilla::unicode::SpecialLower(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 = ToLowerCase(ch);
|
|
break;
|
|
|
|
case StyleTextTransformCase::Uppercase:
|
|
if (languageSpecificCasing == eLSCB_Turkish && ch == 'i') {
|
|
ch = LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE;
|
|
break;
|
|
}
|
|
|
|
if (languageSpecificCasing == eLSCB_Greek) {
|
|
bool markEta;
|
|
bool updateEta;
|
|
ch = mozilla::GreekCasing::UpperCase(ch, greekState, markEta,
|
|
updateEta);
|
|
if (markEta) {
|
|
greekMark = aConvertedString.Length();
|
|
} else if (updateEta) {
|
|
// Remove the TONOS from an uppercase ETA-TONOS that turned out
|
|
// not to be disjunctive-eta.
|
|
MOZ_ASSERT(aConvertedString.Length() > 0 &&
|
|
greekMark < aConvertedString.Length(),
|
|
"bad greekMark!");
|
|
aConvertedString.SetCharAt(kGreekUpperEta, greekMark);
|
|
greekMark = uint32_t(-1);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (languageSpecificCasing == eLSCB_Lithuanian) {
|
|
/*
|
|
* # Remove DOT ABOVE after "i" with upper or titlecase
|
|
*
|
|
* 0307; 0307; ; ; lt After_Soft_Dotted; # COMBINING DOT ABOVE
|
|
*/
|
|
if (ch == 'i' || ch == 'j' || ch == 0x012F) {
|
|
seenSoftDotted = true;
|
|
ch = ToTitleCase(ch);
|
|
break;
|
|
}
|
|
if (seenSoftDotted) {
|
|
seenSoftDotted = false;
|
|
if (ch == 0x0307) {
|
|
ch = uint32_t(-1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (languageSpecificCasing == eLSCB_Irish) {
|
|
bool mark;
|
|
uint8_t action;
|
|
ch = mozilla::IrishCasing::UpperCase(ch, irishState, mark, action);
|
|
if (mark) {
|
|
irishMark = aConvertedString.Length();
|
|
irishMarkSrc = i;
|
|
break;
|
|
} else if (action) {
|
|
nsString& str = aConvertedString; // shorthand
|
|
switch (action) {
|
|
case 1:
|
|
// lowercase a single prefix letter
|
|
MOZ_ASSERT(str.Length() > 0 && irishMark < str.Length(),
|
|
"bad irishMark!");
|
|
str.SetCharAt(ToLowerCase(str[irishMark]), irishMark);
|
|
irishMark = uint32_t(-1);
|
|
irishMarkSrc = uint32_t(-1);
|
|
break;
|
|
case 2:
|
|
// lowercase two prefix letters (immediately before current
|
|
// pos)
|
|
MOZ_ASSERT(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);
|
|
irishMarkSrc = uint32_t(-1);
|
|
break;
|
|
case 3:
|
|
// lowercase one prefix letter, and delete following hyphen
|
|
// (which must be the immediately-preceding char)
|
|
MOZ_ASSERT(str.Length() >= 2 && irishMark == str.Length() - 2,
|
|
"bad irishMark!");
|
|
MOZ_ASSERT(
|
|
irishMark != uint32_t(-1) && irishMarkSrc != uint32_t(-1),
|
|
"failed to set irishMarks");
|
|
str.Replace(irishMark, 2, ToLowerCase(str[irishMark]));
|
|
aDeletedCharsArray[irishMarkSrc + 1] = true;
|
|
// Remove the trailing entries (corresponding to the deleted
|
|
// hyphen) from the auxiliary arrays.
|
|
uint32_t len = aCharsToMergeArray.Length();
|
|
MOZ_ASSERT(len >= 2);
|
|
aCharsToMergeArray.TruncateLength(len - 1);
|
|
if (auxiliaryOutputArrays) {
|
|
MOZ_ASSERT(aStyleArray->Length() == len);
|
|
MOZ_ASSERT(aCanBreakBeforeArray->Length() == len);
|
|
aStyleArray->TruncateLength(len - 1);
|
|
aCanBreakBeforeArray->TruncateLength(len - 1);
|
|
inhibitBreakBefore = true;
|
|
}
|
|
mergeNeeded = true;
|
|
irishMark = uint32_t(-1);
|
|
irishMarkSrc = 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)
|
|
}
|
|
|
|
// Updated mapping for German eszett, not currently reflected in the
|
|
// Unicode data files. This is behind a pref, as it may not work well
|
|
// with many (esp. older) fonts.
|
|
if (ch == 0x00DF &&
|
|
StaticPrefs::
|
|
layout_css_text_transform_uppercase_eszett_enabled()) {
|
|
ch = 0x1E9E;
|
|
break;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
// Bug 1476304: we exclude Georgian letters U+10D0..10FF because of
|
|
// lack of widespread font support for the corresponding Mtavruli
|
|
// characters at this time (July 2018).
|
|
// This condition is to be removed once the major platforms ship with
|
|
// fonts that support U+1C90..1CBF.
|
|
if (ch < 0x10D0 || ch > 0x10FF) {
|
|
ch = ToUpperCase(ch);
|
|
}
|
|
break;
|
|
|
|
case StyleTextTransformCase::Capitalize:
|
|
if (aTextRun) {
|
|
if (capitalizeDutchIJ && ch == 'j') {
|
|
ch = 'J';
|
|
capitalizeDutchIJ = false;
|
|
break;
|
|
}
|
|
capitalizeDutchIJ = false;
|
|
if (aOffsetInTextRun < aTextRun->mCapitalize.Length() &&
|
|
aTextRun->mCapitalize[aOffsetInTextRun]) {
|
|
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;
|
|
}
|
|
if (languageSpecificCasing == eLSCB_Lithuanian) {
|
|
/*
|
|
* # Remove DOT ABOVE after "i" with upper or titlecase
|
|
*
|
|
* 0307; 0307; ; ; lt After_Soft_Dotted; # COMBINING DOT ABOVE
|
|
*/
|
|
if (ch == 'i' || ch == 'j' || ch == 0x012F) {
|
|
seenSoftDotted = true;
|
|
ch = ToTitleCase(ch);
|
|
break;
|
|
}
|
|
if (seenSoftDotted) {
|
|
seenSoftDotted = false;
|
|
if (ch == 0x0307) {
|
|
ch = uint32_t(-1);
|
|
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 StyleTextTransformCase::MathAuto:
|
|
// text-transform: math-auto is used for automatic italicization of
|
|
// single-char <mi> elements. However, some legacy cases (italic style
|
|
// fallback and <mi> with leading/trailing whitespace) are still
|
|
// handled in MathMLTextRunFactory.
|
|
if (length == 1) {
|
|
uint32_t ch2 =
|
|
MathMLTextRunFactory::MathVariant(ch, StyleMathVariant::Italic);
|
|
if (StaticPrefs::mathml_mathvariant_styling_fallback_disabled()) {
|
|
ch = ch2;
|
|
} else if (ch2 != ch) {
|
|
// Bug 930504. Some platforms do not have fonts for Mathematical
|
|
// Alphanumeric Symbols. Hence we only perform the transform if a
|
|
// character is actually available.
|
|
FontMatchType matchType;
|
|
RefPtr<gfxFont> mathFont =
|
|
aTextRun->GetFontGroup()->FindFontForChar(
|
|
ch2, 0, 0, intl::Script::COMMON, nullptr, &matchType);
|
|
if (mathFont) {
|
|
ch = ch2;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("all cases should be handled");
|
|
break;
|
|
}
|
|
|
|
if (!aCaseTransformsOnly) {
|
|
if (!forceNonFullWidth &&
|
|
(style.other_ & StyleTextTransformOther::FULL_WIDTH)) {
|
|
ch = mozilla::unicode::GetFullWidth(ch);
|
|
}
|
|
|
|
if (style.other_ & StyleTextTransformOther::FULL_SIZE_KANA) {
|
|
// clang-format off
|
|
static const uint32_t kSmallKanas[] = {
|
|
// ぁ ぃ ぅ ぇ ぉ っ ゃ ゅ ょ
|
|
0x3041, 0x3043, 0x3045, 0x3047, 0x3049, 0x3063, 0x3083, 0x3085, 0x3087,
|
|
// ゎ ゕ ゖ
|
|
0x308E, 0x3095, 0x3096,
|
|
// ァ ィ ゥ ェ ォ ッ ャ ュ ョ
|
|
0x30A1, 0x30A3, 0x30A5, 0x30A7, 0x30A9, 0x30C3, 0x30E3, 0x30E5, 0x30E7,
|
|
// ヮ ヵ ヶ ㇰ ㇱ ㇲ ㇳ ㇴ ㇵ
|
|
0x30EE, 0x30F5, 0x30F6, 0x31F0, 0x31F1, 0x31F2, 0x31F3, 0x31F4, 0x31F5,
|
|
// ㇶ ㇷ ㇸ ㇹ ㇺ ㇻ ㇼ ㇽ ㇾ
|
|
0x31F6, 0x31F7, 0x31F8, 0x31F9, 0x31FA, 0x31FB, 0x31FC, 0x31FD, 0x31FE,
|
|
// ㇿ
|
|
0x31FF,
|
|
// ｧ ｨ ｩ ｪ ｫ ｬ ｭ ｮ ｯ
|
|
0xFF67, 0xFF68, 0xFF69, 0xFF6A, 0xFF6B, 0xFF6C, 0xFF6D, 0xFF6E, 0xFF6F,
|
|
// 𛄲 𛅐 𛅑 𛅒 𛅕 𛅤 𛅥 𛅦
|
|
0x1B132, 0x1B150, 0x1B151, 0x1B152, 0x1B155, 0x1B164, 0x1B165, 0x1B166,
|
|
// 𛅧
|
|
0x1B167};
|
|
static const uint16_t kFullSizeKanas[] = {
|
|
// あ い う え お つ や ゆ よ
|
|
0x3042, 0x3044, 0x3046, 0x3048, 0x304A, 0x3064, 0x3084, 0x3086, 0x3088,
|
|
// わ か け
|
|
0x308F, 0x304B, 0x3051,
|
|
// ア イ ウ エ オ ツ ヤ ユ ヨ
|
|
0x30A2, 0x30A4, 0x30A6, 0x30A8, 0x30AA, 0x30C4, 0x30E4, 0x30E6, 0x30E8,
|
|
// ワ カ ケ ク シ ス ト ヌ ハ
|
|
0x30EF, 0x30AB, 0x30B1, 0x30AF, 0x30B7, 0x30B9, 0x30C8, 0x30CC, 0x30CF,
|
|
// ヒ フ ヘ ホ ム ラ リ ル レ
|
|
0x30D2, 0x30D5, 0x30D8, 0x30DB, 0x30E0, 0x30E9, 0x30EA, 0x30EB, 0x30EC,
|
|
// ロ
|
|
0x30ED,
|
|
// ｱ ｲ ｳ ｴ ｵ ﾔ ﾕ ﾖ ﾂ
|
|
0xFF71, 0xFF72, 0xFF73, 0xFF74, 0xFF75, 0xFF94, 0xFF95, 0xFF96, 0xFF82,
|
|
// こ ゐ ゑ を コ ヰ ヱ ヲ ン
|
|
0x3053, 0x3090, 0x3091, 0x3092, 0x30B3, 0x30F0, 0x30F1, 0x30F2, 0x30F3};
|
|
// clang-format on
|
|
|
|
size_t index;
|
|
const uint16_t len = MOZ_ARRAY_LENGTH(kSmallKanas);
|
|
if (mozilla::BinarySearch(kSmallKanas, 0, len, ch, &index)) {
|
|
ch = kFullSizeKanas[index];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (forceNonFullWidth) {
|
|
ch = mozilla::unicode::GetFullWidthInverse(ch);
|
|
}
|
|
}
|
|
|
|
if (ch == uint32_t(-1)) {
|
|
aDeletedCharsArray.AppendElement(true);
|
|
mergeNeeded = true;
|
|
} else {
|
|
aDeletedCharsArray.AppendElement(false);
|
|
aCharsToMergeArray.AppendElement(false);
|
|
if (auxiliaryOutputArrays) {
|
|
aStyleArray->AppendElement(charStyle);
|
|
aCanBreakBeforeArray->AppendElement(
|
|
inhibitBreakBefore
|
|
? gfxShapedText::CompressedGlyph::FLAG_BREAK_TYPE_NONE
|
|
: aTextRun->CanBreakBefore(aOffsetInTextRun));
|
|
}
|
|
|
|
if (IS_IN_BMP(ch)) {
|
|
aConvertedString.Append(maskPassword ? mask : ch);
|
|
} else {
|
|
if (maskPassword) {
|
|
aConvertedString.Append(mask);
|
|
// TODO: We should show a password mask for a surrogate pair later.
|
|
aConvertedString.Append(mask);
|
|
} else {
|
|
aConvertedString.Append(H_SURROGATE(ch));
|
|
aConvertedString.Append(L_SURROGATE(ch));
|
|
}
|
|
++extraChars;
|
|
}
|
|
if (!IS_IN_BMP(originalCh)) {
|
|
// Skip the trailing surrogate.
|
|
++aOffsetInTextRun;
|
|
++i;
|
|
aDeletedCharsArray.AppendElement(true);
|
|
}
|
|
|
|
while (extraChars-- > 0) {
|
|
mergeNeeded = true;
|
|
aCharsToMergeArray.AppendElement(true);
|
|
if (auxiliaryOutputArrays) {
|
|
aStyleArray->AppendElement(charStyle);
|
|
aCanBreakBeforeArray->AppendElement(
|
|
gfxShapedText::CompressedGlyph::FLAG_BREAK_TYPE_NONE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// These output arrays, if present, must always have matching lengths:
|
|
if (auxiliaryOutputArrays) {
|
|
DebugOnly<uint32_t> len = aCharsToMergeArray.Length();
|
|
MOZ_ASSERT(aStyleArray->Length() == len);
|
|
MOZ_ASSERT(aCanBreakBeforeArray->Length() == len);
|
|
}
|
|
|
|
return mergeNeeded;
|
|
}
|
|
|
|
void nsCaseTransformTextRunFactory::RebuildTextRun(
|
|
nsTransformedTextRun* aTextRun, DrawTarget* aRefDrawTarget,
|
|
gfxMissingFontRecorder* aMFR) {
|
|
nsAutoString convertedString;
|
|
AutoTArray<bool, 50> charsToMergeArray;
|
|
AutoTArray<bool, 50> deletedCharsArray;
|
|
AutoTArray<uint8_t, 50> canBreakBeforeArray;
|
|
AutoTArray<RefPtr<nsTransformedCharStyle>, 50> styleArray;
|
|
|
|
auto globalTransform =
|
|
mAllUppercase
|
|
? Some(StyleTextTransform{StyleTextTransformCase::Uppercase, {}})
|
|
: Nothing();
|
|
bool mergeNeeded = TransformString(
|
|
aTextRun->mString, convertedString, globalTransform, mMaskChar,
|
|
/* aCaseTransformsOnly = */ false, nullptr, charsToMergeArray,
|
|
deletedCharsArray, aTextRun, 0, &canBreakBeforeArray, &styleArray);
|
|
|
|
gfx::ShapedTextFlags flags;
|
|
gfxTextRunFactory::Parameters innerParams =
|
|
GetParametersForInner(aTextRun, &flags, aRefDrawTarget);
|
|
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
|
|
|
|
RefPtr<nsTransformedTextRun> transformedChild;
|
|
RefPtr<gfxTextRun> cachedChild;
|
|
gfxTextRun* child;
|
|
|
|
if (mInnerTransformingTextRunFactory) {
|
|
transformedChild = mInnerTransformingTextRunFactory->MakeTextRun(
|
|
convertedString.BeginReading(), convertedString.Length(), &innerParams,
|
|
fontGroup, flags, nsTextFrameUtils::Flags(), std::move(styleArray),
|
|
false);
|
|
child = transformedChild.get();
|
|
} else {
|
|
cachedChild = fontGroup->MakeTextRun(
|
|
convertedString.BeginReading(), convertedString.Length(), &innerParams,
|
|
flags, nsTextFrameUtils::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!");
|
|
gfxTextRun::Range range(0, uint32_t(canBreakBeforeArray.Length()));
|
|
child->SetPotentialLineBreaks(range, canBreakBeforeArray.Elements());
|
|
if (transformedChild) {
|
|
transformedChild->FinishSettingProperties(aRefDrawTarget, aMFR);
|
|
}
|
|
|
|
aTextRun->ResetGlyphRuns();
|
|
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->CopyGlyphDataFrom(child, gfxTextRun::Range(child), 0);
|
|
}
|
|
}
|