mirror of
https://github.com/mozilla/gecko-dev.git
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3961 lines
147 KiB
C++
3961 lines
147 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=4 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 "gfxTextRun.h"
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#include "gfx2DGlue.h"
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#include "gfxContext.h"
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#include "gfxFontConstants.h"
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#include "gfxFontMissingGlyphs.h"
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#include "gfxGlyphExtents.h"
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#include "gfxHarfBuzzShaper.h"
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#include "gfxPlatformFontList.h"
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#include "gfxScriptItemizer.h"
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#include "gfxUserFontSet.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Logging.h" // for gfxCriticalError
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/intl/Locale.h"
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#include "mozilla/intl/String.h"
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#include "mozilla/intl/UnicodeProperties.h"
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#include "mozilla/Likely.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/Sprintf.h"
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#include "mozilla/StaticPresData.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/Unused.h"
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#include "nsStyleConsts.h"
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#include "nsStyleUtil.h"
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#include "nsUnicodeProperties.h"
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#include "SharedFontList-impl.h"
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#include "TextDrawTarget.h"
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#ifdef XP_WIN
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# include "gfxWindowsPlatform.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::gfx;
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using namespace mozilla::intl;
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using namespace mozilla::unicode;
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using mozilla::services::GetObserverService;
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static const char16_t kEllipsisChar[] = {0x2026, 0x0};
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static const char16_t kASCIIPeriodsChar[] = {'.', '.', '.', 0x0};
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#ifdef DEBUG_roc
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# define DEBUG_TEXT_RUN_STORAGE_METRICS
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#endif
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#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
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extern uint32_t gTextRunStorageHighWaterMark;
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extern uint32_t gTextRunStorage;
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extern uint32_t gFontCount;
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extern uint32_t gGlyphExtentsCount;
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extern uint32_t gGlyphExtentsWidthsTotalSize;
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extern uint32_t gGlyphExtentsSetupEagerSimple;
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extern uint32_t gGlyphExtentsSetupEagerTight;
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extern uint32_t gGlyphExtentsSetupLazyTight;
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extern uint32_t gGlyphExtentsSetupFallBackToTight;
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#endif
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void gfxTextRun::GlyphRunIterator::NextRun() {
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if (mReverse) {
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if (mGlyphRun == mTextRun->mGlyphRuns.begin()) {
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mGlyphRun = nullptr;
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return;
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}
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--mGlyphRun;
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} else {
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MOZ_DIAGNOSTIC_ASSERT(mGlyphRun != mTextRun->mGlyphRuns.end());
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++mGlyphRun;
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if (mGlyphRun == mTextRun->mGlyphRuns.end()) {
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mGlyphRun = nullptr;
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return;
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}
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}
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if (mGlyphRun->mCharacterOffset >= mEndOffset) {
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mGlyphRun = nullptr;
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return;
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}
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uint32_t glyphRunEndOffset = mGlyphRun == mTextRun->mGlyphRuns.end() - 1
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? mTextRun->GetLength()
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: (mGlyphRun + 1)->mCharacterOffset;
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if (glyphRunEndOffset < mStartOffset) {
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mGlyphRun = nullptr;
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return;
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}
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mStringEnd = std::min(mEndOffset, glyphRunEndOffset);
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mStringStart = std::max(mStartOffset, mGlyphRun->mCharacterOffset);
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}
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#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
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static void AccountStorageForTextRun(gfxTextRun* aTextRun, int32_t aSign) {
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// Ignores detailed glyphs... we don't know when those have been constructed
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// Also ignores gfxSkipChars dynamic storage (which won't be anything
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// for preformatted text)
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// Also ignores GlyphRun array, again because it hasn't been constructed
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// by the time this gets called. If there's only one glyphrun that's stored
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// directly in the textrun anyway so no additional overhead.
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uint32_t length = aTextRun->GetLength();
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int32_t bytes = length * sizeof(gfxTextRun::CompressedGlyph);
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bytes += sizeof(gfxTextRun);
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gTextRunStorage += bytes * aSign;
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gTextRunStorageHighWaterMark =
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std::max(gTextRunStorageHighWaterMark, gTextRunStorage);
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}
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#endif
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bool gfxTextRun::NeedsGlyphExtents() const {
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if (GetFlags() & gfx::ShapedTextFlags::TEXT_NEED_BOUNDING_BOX) {
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return true;
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}
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for (const auto& run : mGlyphRuns) {
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if (run.mFont->GetFontEntry()->IsUserFont()) {
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return true;
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}
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}
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return false;
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}
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// Helper for textRun creation to preallocate storage for glyph records;
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// this function returns a pointer to the newly-allocated glyph storage.
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// Returns nullptr if allocation fails.
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void* gfxTextRun::AllocateStorageForTextRun(size_t aSize, uint32_t aLength) {
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// Allocate the storage we need, returning nullptr on failure rather than
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// throwing an exception (because web content can create huge runs).
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void* storage = malloc(aSize + aLength * sizeof(CompressedGlyph));
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if (!storage) {
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NS_WARNING("failed to allocate storage for text run!");
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return nullptr;
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}
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// Initialize the glyph storage (beyond aSize) to zero
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memset(reinterpret_cast<char*>(storage) + aSize, 0,
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aLength * sizeof(CompressedGlyph));
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return storage;
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}
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already_AddRefed<gfxTextRun> gfxTextRun::Create(
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const gfxTextRunFactory::Parameters* aParams, uint32_t aLength,
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gfxFontGroup* aFontGroup, gfx::ShapedTextFlags aFlags,
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nsTextFrameUtils::Flags aFlags2) {
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void* storage = AllocateStorageForTextRun(sizeof(gfxTextRun), aLength);
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if (!storage) {
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return nullptr;
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}
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RefPtr<gfxTextRun> result =
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new (storage) gfxTextRun(aParams, aLength, aFontGroup, aFlags, aFlags2);
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return result.forget();
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}
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gfxTextRun::gfxTextRun(const gfxTextRunFactory::Parameters* aParams,
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uint32_t aLength, gfxFontGroup* aFontGroup,
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gfx::ShapedTextFlags aFlags,
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nsTextFrameUtils::Flags aFlags2)
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: gfxShapedText(aLength, aFlags, aParams->mAppUnitsPerDevUnit),
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mUserData(aParams->mUserData),
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mFontGroup(aFontGroup),
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mFlags2(aFlags2),
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mReleasedFontGroup(false),
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mReleasedFontGroupSkippedDrawing(false),
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mShapingState(eShapingState_Normal) {
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NS_ASSERTION(mAppUnitsPerDevUnit > 0, "Invalid app unit scale");
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NS_ADDREF(mFontGroup);
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#ifndef RELEASE_OR_BETA
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gfxTextPerfMetrics* tp = aFontGroup->GetTextPerfMetrics();
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if (tp) {
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tp->current.textrunConst++;
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}
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#endif
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mCharacterGlyphs = reinterpret_cast<CompressedGlyph*>(this + 1);
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if (aParams->mSkipChars) {
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mSkipChars.TakeFrom(aParams->mSkipChars);
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}
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#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
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AccountStorageForTextRun(this, 1);
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#endif
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mDontSkipDrawing =
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!!(aFlags2 & nsTextFrameUtils::Flags::DontSkipDrawingForPendingUserFonts);
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}
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gfxTextRun::~gfxTextRun() {
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#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
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AccountStorageForTextRun(this, -1);
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#endif
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#ifdef DEBUG
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// Make it easy to detect a dead text run
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mFlags = ~gfx::ShapedTextFlags();
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mFlags2 = ~nsTextFrameUtils::Flags();
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#endif
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// The cached ellipsis textrun (if any) in a fontgroup will have already
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// been told to release its reference to the group, so we mustn't do that
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// again here.
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if (!mReleasedFontGroup) {
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#ifndef RELEASE_OR_BETA
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gfxTextPerfMetrics* tp = mFontGroup->GetTextPerfMetrics();
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if (tp) {
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tp->current.textrunDestr++;
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}
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#endif
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NS_RELEASE(mFontGroup);
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}
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}
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void gfxTextRun::ReleaseFontGroup() {
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NS_ASSERTION(!mReleasedFontGroup, "doubly released!");
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// After dropping our reference to the font group, we'll no longer be able
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// to get up-to-date results for ShouldSkipDrawing(). Store the current
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// value in mReleasedFontGroupSkippedDrawing.
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//
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// (It doesn't actually matter that we can't get up-to-date results for
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// ShouldSkipDrawing(), since the only text runs that we call
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// ReleaseFontGroup() for are ellipsis text runs, and we ask the font
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// group for a new ellipsis text run each time we want to draw one,
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// and ensure that the cached one is cleared in ClearCachedData() when
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// font loading status changes.)
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mReleasedFontGroupSkippedDrawing = mFontGroup->ShouldSkipDrawing();
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NS_RELEASE(mFontGroup);
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mReleasedFontGroup = true;
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}
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bool gfxTextRun::SetPotentialLineBreaks(Range aRange,
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const uint8_t* aBreakBefore) {
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NS_ASSERTION(aRange.end <= GetLength(), "Overflow");
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uint32_t changed = 0;
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CompressedGlyph* cg = mCharacterGlyphs + aRange.start;
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const CompressedGlyph* const end = cg + aRange.Length();
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while (cg < end) {
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uint8_t canBreak = *aBreakBefore++;
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if (canBreak && !cg->IsClusterStart()) {
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// XXX If we replace the line-breaker with one based more closely
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// on UAX#14 (e.g. using ICU), this may not be needed any more.
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// Avoid possible breaks inside a cluster, EXCEPT when the previous
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// character was a space (compare UAX#14 rules LB9, LB10).
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if (cg == mCharacterGlyphs || !(cg - 1)->CharIsSpace()) {
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canBreak = CompressedGlyph::FLAG_BREAK_TYPE_NONE;
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}
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}
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// If a break is allowed here, set the break flag, but don't clear a
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// possible pre-existing emergency-break flag already in the run.
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if (canBreak) {
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changed |= cg->SetCanBreakBefore(canBreak);
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}
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++cg;
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}
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return changed != 0;
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}
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gfxTextRun::LigatureData gfxTextRun::ComputeLigatureData(
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Range aPartRange, const PropertyProvider* aProvider) const {
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NS_ASSERTION(aPartRange.start < aPartRange.end,
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"Computing ligature data for empty range");
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NS_ASSERTION(aPartRange.end <= GetLength(), "Character length overflow");
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LigatureData result;
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const CompressedGlyph* charGlyphs = mCharacterGlyphs;
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uint32_t i;
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for (i = aPartRange.start; !charGlyphs[i].IsLigatureGroupStart(); --i) {
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NS_ASSERTION(i > 0, "Ligature at the start of the run??");
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}
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result.mRange.start = i;
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for (i = aPartRange.start + 1;
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i < GetLength() && !charGlyphs[i].IsLigatureGroupStart(); ++i) {
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}
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result.mRange.end = i;
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int32_t ligatureWidth = GetAdvanceForGlyphs(result.mRange);
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// Count the number of started clusters we have seen
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uint32_t totalClusterCount = 0;
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uint32_t partClusterIndex = 0;
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uint32_t partClusterCount = 0;
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for (i = result.mRange.start; i < result.mRange.end; ++i) {
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// Treat the first character of the ligature as the start of a
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// cluster for our purposes of allocating ligature width to its
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// characters.
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if (i == result.mRange.start || charGlyphs[i].IsClusterStart()) {
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++totalClusterCount;
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if (i < aPartRange.start) {
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++partClusterIndex;
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} else if (i < aPartRange.end) {
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++partClusterCount;
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}
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}
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}
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NS_ASSERTION(totalClusterCount > 0, "Ligature involving no clusters??");
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result.mPartAdvance = partClusterIndex * (ligatureWidth / totalClusterCount);
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result.mPartWidth = partClusterCount * (ligatureWidth / totalClusterCount);
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// Any rounding errors are apportioned to the final part of the ligature,
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// so that measuring all parts of a ligature and summing them is equal to
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// the ligature width.
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if (aPartRange.end == result.mRange.end) {
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gfxFloat allParts = totalClusterCount * (ligatureWidth / totalClusterCount);
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result.mPartWidth += ligatureWidth - allParts;
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}
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if (partClusterCount == 0) {
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// nothing to draw
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result.mClipBeforePart = result.mClipAfterPart = true;
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} else {
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// Determine whether we should clip before or after this part when
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// drawing its slice of the ligature.
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// We need to clip before the part if any cluster is drawn before
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// this part.
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result.mClipBeforePart = partClusterIndex > 0;
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// We need to clip after the part if any cluster is drawn after
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// this part.
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result.mClipAfterPart =
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partClusterIndex + partClusterCount < totalClusterCount;
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}
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if (aProvider && (mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_SPACING)) {
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gfxFont::Spacing spacing;
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if (aPartRange.start == result.mRange.start) {
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aProvider->GetSpacing(Range(aPartRange.start, aPartRange.start + 1),
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&spacing);
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result.mPartWidth += spacing.mBefore;
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}
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if (aPartRange.end == result.mRange.end) {
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aProvider->GetSpacing(Range(aPartRange.end - 1, aPartRange.end),
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&spacing);
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result.mPartWidth += spacing.mAfter;
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}
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}
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return result;
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}
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gfxFloat gfxTextRun::ComputePartialLigatureWidth(
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Range aPartRange, const PropertyProvider* aProvider) const {
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if (aPartRange.start >= aPartRange.end) return 0;
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LigatureData data = ComputeLigatureData(aPartRange, aProvider);
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return data.mPartWidth;
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}
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int32_t gfxTextRun::GetAdvanceForGlyphs(Range aRange) const {
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int32_t advance = 0;
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for (auto i = aRange.start; i < aRange.end; ++i) {
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advance += GetAdvanceForGlyph(i);
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}
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return advance;
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}
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static void GetAdjustedSpacing(
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const gfxTextRun* aTextRun, gfxTextRun::Range aRange,
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const gfxTextRun::PropertyProvider& aProvider,
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gfxTextRun::PropertyProvider::Spacing* aSpacing) {
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if (aRange.start >= aRange.end) {
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return;
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}
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aProvider.GetSpacing(aRange, aSpacing);
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#ifdef DEBUG
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// Check to see if we have spacing inside ligatures
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const gfxTextRun::CompressedGlyph* charGlyphs =
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aTextRun->GetCharacterGlyphs();
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uint32_t i;
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for (i = aRange.start; i < aRange.end; ++i) {
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if (!charGlyphs[i].IsLigatureGroupStart()) {
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NS_ASSERTION(i == aRange.start || aSpacing[i - aRange.start].mBefore == 0,
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"Before-spacing inside a ligature!");
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NS_ASSERTION(
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i - 1 <= aRange.start || aSpacing[i - 1 - aRange.start].mAfter == 0,
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"After-spacing inside a ligature!");
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}
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}
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#endif
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}
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bool gfxTextRun::GetAdjustedSpacingArray(
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Range aRange, const PropertyProvider* aProvider, Range aSpacingRange,
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nsTArray<PropertyProvider::Spacing>* aSpacing) const {
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if (!aProvider || !(mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_SPACING)) {
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return false;
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}
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if (!aSpacing->AppendElements(aRange.Length(), fallible)) {
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return false;
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}
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auto spacingOffset = aSpacingRange.start - aRange.start;
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memset(aSpacing->Elements(), 0, sizeof(gfxFont::Spacing) * spacingOffset);
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GetAdjustedSpacing(this, aSpacingRange, *aProvider,
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aSpacing->Elements() + spacingOffset);
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memset(aSpacing->Elements() + spacingOffset + aSpacingRange.Length(), 0,
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sizeof(gfxFont::Spacing) * (aRange.end - aSpacingRange.end));
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return true;
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}
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bool gfxTextRun::ShrinkToLigatureBoundaries(Range* aRange) const {
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if (aRange->start >= aRange->end) {
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return false;
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}
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const CompressedGlyph* charGlyphs = mCharacterGlyphs;
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bool adjusted = false;
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while (aRange->start < aRange->end &&
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!charGlyphs[aRange->start].IsLigatureGroupStart()) {
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++aRange->start;
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adjusted = true;
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}
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if (aRange->end < GetLength()) {
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while (aRange->end > aRange->start &&
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!charGlyphs[aRange->end].IsLigatureGroupStart()) {
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--aRange->end;
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adjusted = true;
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}
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}
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return adjusted;
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}
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void gfxTextRun::DrawGlyphs(gfxFont* aFont, Range aRange, gfx::Point* aPt,
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const PropertyProvider* aProvider,
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Range aSpacingRange, TextRunDrawParams& aParams,
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gfx::ShapedTextFlags aOrientation) const {
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AutoTArray<PropertyProvider::Spacing, 200> spacingBuffer;
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bool haveSpacing =
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GetAdjustedSpacingArray(aRange, aProvider, aSpacingRange, &spacingBuffer);
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aParams.spacing = haveSpacing ? spacingBuffer.Elements() : nullptr;
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aFont->Draw(this, aRange.start, aRange.end, aPt, aParams, aOrientation);
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}
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static void ClipPartialLigature(const gfxTextRun* aTextRun, gfxFloat* aStart,
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gfxFloat* aEnd, gfxFloat aOrigin,
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gfxTextRun::LigatureData* aLigature) {
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if (aLigature->mClipBeforePart) {
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if (aTextRun->IsRightToLeft()) {
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*aEnd = std::min(*aEnd, aOrigin);
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} else {
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*aStart = std::max(*aStart, aOrigin);
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}
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}
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if (aLigature->mClipAfterPart) {
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gfxFloat endEdge =
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aOrigin + aTextRun->GetDirection() * aLigature->mPartWidth;
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if (aTextRun->IsRightToLeft()) {
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*aStart = std::max(*aStart, endEdge);
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} else {
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*aEnd = std::min(*aEnd, endEdge);
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}
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}
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}
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void gfxTextRun::DrawPartialLigature(gfxFont* aFont, Range aRange,
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gfx::Point* aPt,
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|
const PropertyProvider* aProvider,
|
|
TextRunDrawParams& aParams,
|
|
gfx::ShapedTextFlags aOrientation) const {
|
|
if (aRange.start >= aRange.end) {
|
|
return;
|
|
}
|
|
|
|
// Draw partial ligature. We hack this by clipping the ligature.
|
|
LigatureData data = ComputeLigatureData(aRange, aProvider);
|
|
gfxRect clipExtents = aParams.context->GetClipExtents();
|
|
gfxFloat start, end;
|
|
if (aParams.isVerticalRun) {
|
|
start = clipExtents.Y() * mAppUnitsPerDevUnit;
|
|
end = clipExtents.YMost() * mAppUnitsPerDevUnit;
|
|
ClipPartialLigature(this, &start, &end, aPt->y, &data);
|
|
} else {
|
|
start = clipExtents.X() * mAppUnitsPerDevUnit;
|
|
end = clipExtents.XMost() * mAppUnitsPerDevUnit;
|
|
ClipPartialLigature(this, &start, &end, aPt->x, &data);
|
|
}
|
|
|
|
gfxClipAutoSaveRestore autoSaveClip(aParams.context);
|
|
{
|
|
// use division here to ensure that when the rect is aligned on multiples
|
|
// of mAppUnitsPerDevUnit, we clip to true device unit boundaries.
|
|
// Also, make sure we snap the rectangle to device pixels.
|
|
Rect clipRect =
|
|
aParams.isVerticalRun
|
|
? Rect(clipExtents.X(), start / mAppUnitsPerDevUnit,
|
|
clipExtents.Width(), (end - start) / mAppUnitsPerDevUnit)
|
|
: Rect(start / mAppUnitsPerDevUnit, clipExtents.Y(),
|
|
(end - start) / mAppUnitsPerDevUnit, clipExtents.Height());
|
|
MaybeSnapToDevicePixels(clipRect, *aParams.dt, true);
|
|
|
|
autoSaveClip.Clip(clipRect);
|
|
}
|
|
|
|
gfx::Point pt;
|
|
if (aParams.isVerticalRun) {
|
|
pt = Point(aPt->x, aPt->y - aParams.direction * data.mPartAdvance);
|
|
} else {
|
|
pt = Point(aPt->x - aParams.direction * data.mPartAdvance, aPt->y);
|
|
}
|
|
|
|
DrawGlyphs(aFont, data.mRange, &pt, aProvider, aRange, aParams, aOrientation);
|
|
|
|
if (aParams.isVerticalRun) {
|
|
aPt->y += aParams.direction * data.mPartWidth;
|
|
} else {
|
|
aPt->x += aParams.direction * data.mPartWidth;
|
|
}
|
|
}
|
|
|
|
// Returns true if the font has synthetic bolding enabled,
|
|
// or is a color font (COLR/SVG/sbix/CBDT), false otherwise. This is used to
|
|
// check whether the text run needs to be explicitly composited in order to
|
|
// support opacity.
|
|
static bool HasSyntheticBoldOrColor(gfxFont* aFont) {
|
|
if (aFont->ApplySyntheticBold()) {
|
|
return true;
|
|
}
|
|
gfxFontEntry* fe = aFont->GetFontEntry();
|
|
if (fe->TryGetSVGData(aFont) || fe->TryGetColorGlyphs()) {
|
|
return true;
|
|
}
|
|
#if defined(XP_MACOSX) // sbix fonts only supported via Core Text
|
|
if (fe->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'))) {
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
// helper class for double-buffering drawing with non-opaque color
|
|
struct MOZ_STACK_CLASS BufferAlphaColor {
|
|
explicit BufferAlphaColor(gfxContext* aContext) : mContext(aContext) {}
|
|
|
|
~BufferAlphaColor() = default;
|
|
|
|
void PushSolidColor(const gfxRect& aBounds, const DeviceColor& aAlphaColor,
|
|
uint32_t appsPerDevUnit) {
|
|
mContext->Save();
|
|
mContext->SnappedClip(gfxRect(
|
|
aBounds.X() / appsPerDevUnit, aBounds.Y() / appsPerDevUnit,
|
|
aBounds.Width() / appsPerDevUnit, aBounds.Height() / appsPerDevUnit));
|
|
mContext->SetDeviceColor(
|
|
DeviceColor(aAlphaColor.r, aAlphaColor.g, aAlphaColor.b));
|
|
mContext->PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, aAlphaColor.a);
|
|
}
|
|
|
|
void PopAlpha() {
|
|
// pop the text, using the color alpha as the opacity
|
|
mContext->PopGroupAndBlend();
|
|
mContext->Restore();
|
|
}
|
|
|
|
gfxContext* mContext;
|
|
};
|
|
|
|
void gfxTextRun::Draw(const Range aRange, const gfx::Point aPt,
|
|
const DrawParams& aParams) const {
|
|
NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
|
|
NS_ASSERTION(aParams.drawMode == DrawMode::GLYPH_PATH ||
|
|
!(aParams.drawMode & DrawMode::GLYPH_PATH),
|
|
"GLYPH_PATH cannot be used with GLYPH_FILL, GLYPH_STROKE or "
|
|
"GLYPH_STROKE_UNDERNEATH");
|
|
NS_ASSERTION(aParams.drawMode == DrawMode::GLYPH_PATH || !aParams.callbacks,
|
|
"callback must not be specified unless using GLYPH_PATH");
|
|
|
|
bool skipDrawing =
|
|
!mDontSkipDrawing && (mFontGroup ? mFontGroup->ShouldSkipDrawing()
|
|
: mReleasedFontGroupSkippedDrawing);
|
|
auto* textDrawer = aParams.context->GetTextDrawer();
|
|
if (aParams.drawMode & DrawMode::GLYPH_FILL) {
|
|
DeviceColor currentColor;
|
|
if (aParams.context->GetDeviceColor(currentColor) && currentColor.a == 0 &&
|
|
!textDrawer) {
|
|
skipDrawing = true;
|
|
}
|
|
}
|
|
|
|
gfxFloat direction = GetDirection();
|
|
|
|
if (skipDrawing) {
|
|
// We don't need to draw anything;
|
|
// but if the caller wants advance width, we need to compute it here
|
|
if (aParams.advanceWidth) {
|
|
gfxTextRun::Metrics metrics =
|
|
MeasureText(aRange, gfxFont::LOOSE_INK_EXTENTS,
|
|
aParams.context->GetDrawTarget(), aParams.provider);
|
|
*aParams.advanceWidth = metrics.mAdvanceWidth * direction;
|
|
}
|
|
|
|
// return without drawing
|
|
return;
|
|
}
|
|
|
|
// synthetic bolding draws glyphs twice ==> colors with opacity won't draw
|
|
// correctly unless first drawn without alpha
|
|
BufferAlphaColor syntheticBoldBuffer(aParams.context);
|
|
DeviceColor currentColor;
|
|
bool mayNeedBuffering =
|
|
aParams.drawMode & DrawMode::GLYPH_FILL &&
|
|
aParams.context->HasNonOpaqueNonTransparentColor(currentColor) &&
|
|
!textDrawer;
|
|
|
|
// If we need to double-buffer, we'll need to measure the text first to
|
|
// get the bounds of the area of interest. Ideally we'd do that just for
|
|
// the specific glyph run(s) that need buffering, but because of bug
|
|
// 1612610 we currently use the extent of the entire range even when
|
|
// just buffering a subrange. So we'll measure the full range once and
|
|
// keep the metrics on hand for any subsequent subranges.
|
|
gfxTextRun::Metrics metrics;
|
|
bool gotMetrics = false;
|
|
|
|
// Set up parameters that will be constant across all glyph runs we need
|
|
// to draw, regardless of the font used.
|
|
TextRunDrawParams params(aParams.paletteCache);
|
|
params.context = aParams.context;
|
|
params.devPerApp = 1.0 / double(GetAppUnitsPerDevUnit());
|
|
params.isVerticalRun = IsVertical();
|
|
params.isRTL = IsRightToLeft();
|
|
params.direction = direction;
|
|
params.strokeOpts = aParams.strokeOpts;
|
|
params.textStrokeColor = aParams.textStrokeColor;
|
|
params.fontPalette = aParams.fontPalette;
|
|
params.textStrokePattern = aParams.textStrokePattern;
|
|
params.drawOpts = aParams.drawOpts;
|
|
params.drawMode = aParams.drawMode;
|
|
params.hasTextShadow = aParams.hasTextShadow;
|
|
params.callbacks = aParams.callbacks;
|
|
params.runContextPaint = aParams.contextPaint;
|
|
params.paintSVGGlyphs =
|
|
!aParams.callbacks || aParams.callbacks->mShouldPaintSVGGlyphs;
|
|
params.dt = aParams.context->GetDrawTarget();
|
|
params.textDrawer = textDrawer;
|
|
if (textDrawer) {
|
|
params.clipRect = textDrawer->GeckoClipRect();
|
|
}
|
|
params.allowGDI = aParams.allowGDI;
|
|
|
|
gfxFloat advance = 0.0;
|
|
gfx::Point pt = aPt;
|
|
|
|
for (GlyphRunIterator iter(this, aRange); !iter.AtEnd(); iter.NextRun()) {
|
|
gfxFont* font = iter.GlyphRun()->mFont;
|
|
Range runRange(iter.StringStart(), iter.StringEnd());
|
|
|
|
bool needToRestore = false;
|
|
if (mayNeedBuffering && HasSyntheticBoldOrColor(font)) {
|
|
needToRestore = true;
|
|
if (!gotMetrics) {
|
|
// Measure text; use the bounding box to determine the area we need
|
|
// to buffer. We measure the entire range, rather than just the glyph
|
|
// run that we're actually handling, because of bug 1612610: if the
|
|
// bounding box passed to PushSolidColor does not intersect the
|
|
// drawTarget's current clip, the skia backend fails to clip properly.
|
|
// This means we may use a larger buffer than actually needed, but is
|
|
// otherwise harmless.
|
|
metrics = MeasureText(aRange, gfxFont::LOOSE_INK_EXTENTS, params.dt,
|
|
aParams.provider);
|
|
if (IsRightToLeft()) {
|
|
metrics.mBoundingBox.MoveBy(
|
|
gfxPoint(aPt.x - metrics.mAdvanceWidth, aPt.y));
|
|
} else {
|
|
metrics.mBoundingBox.MoveBy(gfxPoint(aPt.x, aPt.y));
|
|
}
|
|
gotMetrics = true;
|
|
}
|
|
syntheticBoldBuffer.PushSolidColor(metrics.mBoundingBox, currentColor,
|
|
GetAppUnitsPerDevUnit());
|
|
}
|
|
|
|
Range ligatureRange(runRange);
|
|
bool adjusted = ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
bool drawPartial =
|
|
adjusted &&
|
|
((aParams.drawMode & (DrawMode::GLYPH_FILL | DrawMode::GLYPH_STROKE)) ||
|
|
(aParams.drawMode == DrawMode::GLYPH_PATH && aParams.callbacks));
|
|
gfx::Point origPt = pt;
|
|
|
|
if (drawPartial) {
|
|
DrawPartialLigature(font, Range(runRange.start, ligatureRange.start), &pt,
|
|
aParams.provider, params,
|
|
iter.GlyphRun()->mOrientation);
|
|
}
|
|
|
|
DrawGlyphs(font, ligatureRange, &pt, aParams.provider, ligatureRange,
|
|
params, iter.GlyphRun()->mOrientation);
|
|
|
|
if (drawPartial) {
|
|
DrawPartialLigature(font, Range(ligatureRange.end, runRange.end), &pt,
|
|
aParams.provider, params,
|
|
iter.GlyphRun()->mOrientation);
|
|
}
|
|
|
|
if (params.isVerticalRun) {
|
|
advance += (pt.y - origPt.y) * params.direction;
|
|
} else {
|
|
advance += (pt.x - origPt.x) * params.direction;
|
|
}
|
|
|
|
// composite result when synthetic bolding used
|
|
if (needToRestore) {
|
|
syntheticBoldBuffer.PopAlpha();
|
|
}
|
|
}
|
|
|
|
if (aParams.advanceWidth) {
|
|
*aParams.advanceWidth = advance;
|
|
}
|
|
}
|
|
|
|
// This method is mostly parallel to Draw().
|
|
void gfxTextRun::DrawEmphasisMarks(
|
|
gfxContext* aContext, gfxTextRun* aMark, gfxFloat aMarkAdvance,
|
|
gfx::Point aPt, Range aRange, const PropertyProvider* aProvider,
|
|
mozilla::gfx::PaletteCache& aPaletteCache) const {
|
|
MOZ_ASSERT(aRange.end <= GetLength());
|
|
|
|
EmphasisMarkDrawParams params(aContext, aPaletteCache);
|
|
params.mark = aMark;
|
|
params.advance = aMarkAdvance;
|
|
params.direction = GetDirection();
|
|
params.isVertical = IsVertical();
|
|
|
|
float& inlineCoord = params.isVertical ? aPt.y.value : aPt.x.value;
|
|
float direction = params.direction;
|
|
|
|
for (GlyphRunIterator iter(this, aRange); !iter.AtEnd(); iter.NextRun()) {
|
|
gfxFont* font = iter.GlyphRun()->mFont;
|
|
uint32_t start = iter.StringStart();
|
|
uint32_t end = iter.StringEnd();
|
|
Range ligatureRange(start, end);
|
|
bool adjusted = ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
if (adjusted) {
|
|
inlineCoord +=
|
|
direction * ComputePartialLigatureWidth(
|
|
Range(start, ligatureRange.start), aProvider);
|
|
}
|
|
|
|
AutoTArray<PropertyProvider::Spacing, 200> spacingBuffer;
|
|
bool haveSpacing = GetAdjustedSpacingArray(ligatureRange, aProvider,
|
|
ligatureRange, &spacingBuffer);
|
|
params.spacing = haveSpacing ? spacingBuffer.Elements() : nullptr;
|
|
font->DrawEmphasisMarks(this, &aPt, ligatureRange.start,
|
|
ligatureRange.Length(), params);
|
|
|
|
if (adjusted) {
|
|
inlineCoord += direction * ComputePartialLigatureWidth(
|
|
Range(ligatureRange.end, end), aProvider);
|
|
}
|
|
}
|
|
}
|
|
|
|
void gfxTextRun::AccumulateMetricsForRun(
|
|
gfxFont* aFont, Range aRange, gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget, const PropertyProvider* aProvider,
|
|
Range aSpacingRange, gfx::ShapedTextFlags aOrientation,
|
|
Metrics* aMetrics) const {
|
|
AutoTArray<PropertyProvider::Spacing, 200> spacingBuffer;
|
|
bool haveSpacing =
|
|
GetAdjustedSpacingArray(aRange, aProvider, aSpacingRange, &spacingBuffer);
|
|
Metrics metrics = aFont->Measure(
|
|
this, aRange.start, aRange.end, aBoundingBoxType, aRefDrawTarget,
|
|
haveSpacing ? spacingBuffer.Elements() : nullptr, aOrientation);
|
|
aMetrics->CombineWith(metrics, IsRightToLeft());
|
|
}
|
|
|
|
void gfxTextRun::AccumulatePartialLigatureMetrics(
|
|
gfxFont* aFont, Range aRange, gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget, const PropertyProvider* aProvider,
|
|
gfx::ShapedTextFlags aOrientation, Metrics* aMetrics) const {
|
|
if (aRange.start >= aRange.end) return;
|
|
|
|
// Measure partial ligature. We hack this by clipping the metrics in the
|
|
// same way we clip the drawing.
|
|
LigatureData data = ComputeLigatureData(aRange, aProvider);
|
|
|
|
// First measure the complete ligature
|
|
Metrics metrics;
|
|
AccumulateMetricsForRun(aFont, data.mRange, aBoundingBoxType, aRefDrawTarget,
|
|
aProvider, aRange, aOrientation, &metrics);
|
|
|
|
// Clip the bounding box to the ligature part
|
|
gfxFloat bboxLeft = metrics.mBoundingBox.X();
|
|
gfxFloat bboxRight = metrics.mBoundingBox.XMost();
|
|
// Where we are going to start "drawing" relative to our left baseline origin
|
|
gfxFloat origin =
|
|
IsRightToLeft() ? metrics.mAdvanceWidth - data.mPartAdvance : 0;
|
|
ClipPartialLigature(this, &bboxLeft, &bboxRight, origin, &data);
|
|
metrics.mBoundingBox.SetBoxX(bboxLeft, bboxRight);
|
|
|
|
// mBoundingBox is now relative to the left baseline origin for the entire
|
|
// ligature. Shift it left.
|
|
metrics.mBoundingBox.MoveByX(
|
|
-(IsRightToLeft()
|
|
? metrics.mAdvanceWidth - (data.mPartAdvance + data.mPartWidth)
|
|
: data.mPartAdvance));
|
|
metrics.mAdvanceWidth = data.mPartWidth;
|
|
|
|
aMetrics->CombineWith(metrics, IsRightToLeft());
|
|
}
|
|
|
|
gfxTextRun::Metrics gfxTextRun::MeasureText(
|
|
Range aRange, gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget, const PropertyProvider* aProvider) const {
|
|
NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
|
|
|
|
Metrics accumulatedMetrics;
|
|
for (GlyphRunIterator iter(this, aRange); !iter.AtEnd(); iter.NextRun()) {
|
|
gfxFont* font = iter.GlyphRun()->mFont;
|
|
uint32_t start = iter.StringStart();
|
|
uint32_t end = iter.StringEnd();
|
|
Range ligatureRange(start, end);
|
|
bool adjusted = ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
if (adjusted) {
|
|
AccumulatePartialLigatureMetrics(font, Range(start, ligatureRange.start),
|
|
aBoundingBoxType, aRefDrawTarget,
|
|
aProvider, iter.GlyphRun()->mOrientation,
|
|
&accumulatedMetrics);
|
|
}
|
|
|
|
// XXX This sucks. We have to get glyph extents just so we can detect
|
|
// glyphs outside the font box, even when aBoundingBoxType is LOOSE,
|
|
// even though in almost all cases we could get correct results just
|
|
// by getting some ascent/descent from the font and using our stored
|
|
// advance widths.
|
|
AccumulateMetricsForRun(font, ligatureRange, aBoundingBoxType,
|
|
aRefDrawTarget, aProvider, ligatureRange,
|
|
iter.GlyphRun()->mOrientation, &accumulatedMetrics);
|
|
|
|
if (adjusted) {
|
|
AccumulatePartialLigatureMetrics(
|
|
font, Range(ligatureRange.end, end), aBoundingBoxType, aRefDrawTarget,
|
|
aProvider, iter.GlyphRun()->mOrientation, &accumulatedMetrics);
|
|
}
|
|
}
|
|
|
|
return accumulatedMetrics;
|
|
}
|
|
|
|
void gfxTextRun::GetLineHeightMetrics(Range aRange, gfxFloat& aAscent,
|
|
gfxFloat& aDescent) const {
|
|
Metrics accumulatedMetrics;
|
|
for (GlyphRunIterator iter(this, aRange); !iter.AtEnd(); iter.NextRun()) {
|
|
gfxFont* font = iter.GlyphRun()->mFont;
|
|
auto metrics =
|
|
font->Measure(this, 0, 0, gfxFont::LOOSE_INK_EXTENTS, nullptr, nullptr,
|
|
iter.GlyphRun()->mOrientation);
|
|
accumulatedMetrics.CombineWith(metrics, false);
|
|
}
|
|
aAscent = accumulatedMetrics.mAscent;
|
|
aDescent = accumulatedMetrics.mDescent;
|
|
}
|
|
|
|
#define MEASUREMENT_BUFFER_SIZE 100
|
|
|
|
void gfxTextRun::ClassifyAutoHyphenations(uint32_t aStart, Range aRange,
|
|
nsTArray<HyphenType>& aHyphenBuffer,
|
|
HyphenationState* aWordState) {
|
|
MOZ_ASSERT(
|
|
aRange.end - aStart <= aHyphenBuffer.Length() && aRange.start >= aStart,
|
|
"Range out of bounds");
|
|
MOZ_ASSERT(aWordState->mostRecentBoundary >= aStart,
|
|
"Unexpected aMostRecentWordBoundary!!");
|
|
|
|
uint32_t start =
|
|
std::min<uint32_t>(aRange.start, aWordState->mostRecentBoundary);
|
|
|
|
for (uint32_t i = start; i < aRange.end; ++i) {
|
|
if (aHyphenBuffer[i - aStart] == HyphenType::Explicit &&
|
|
!aWordState->hasExplicitHyphen) {
|
|
aWordState->hasExplicitHyphen = true;
|
|
}
|
|
if (!aWordState->hasManualHyphen &&
|
|
(aHyphenBuffer[i - aStart] == HyphenType::Soft ||
|
|
aHyphenBuffer[i - aStart] == HyphenType::Explicit)) {
|
|
aWordState->hasManualHyphen = true;
|
|
// This is the first manual hyphen in the current word. We can only
|
|
// know if the current word has a manual hyphen until now. So, we need
|
|
// to run a sub loop to update the auto hyphens between the start of
|
|
// the current word and this manual hyphen.
|
|
if (aWordState->hasAutoHyphen) {
|
|
for (uint32_t j = aWordState->mostRecentBoundary; j < i; j++) {
|
|
if (aHyphenBuffer[j - aStart] ==
|
|
HyphenType::AutoWithoutManualInSameWord) {
|
|
aHyphenBuffer[j - aStart] = HyphenType::AutoWithManualInSameWord;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (aHyphenBuffer[i - aStart] == HyphenType::AutoWithoutManualInSameWord) {
|
|
if (!aWordState->hasAutoHyphen) {
|
|
aWordState->hasAutoHyphen = true;
|
|
}
|
|
if (aWordState->hasManualHyphen) {
|
|
aHyphenBuffer[i - aStart] = HyphenType::AutoWithManualInSameWord;
|
|
}
|
|
}
|
|
|
|
// If we're at the word boundary, clear/reset couple states.
|
|
if (mCharacterGlyphs[i].CharIsSpace() || mCharacterGlyphs[i].CharIsTab() ||
|
|
mCharacterGlyphs[i].CharIsNewline() ||
|
|
// Since we will not have a boundary in the end of the string, let's
|
|
// call the end of the string a special case for word boundary.
|
|
i == GetLength() - 1) {
|
|
// We can only get to know whether we should raise/clear an explicit
|
|
// manual hyphen until we get to the end of a word, because this depends
|
|
// on whether there exists at least one auto hyphen in the same word.
|
|
if (!aWordState->hasAutoHyphen && aWordState->hasExplicitHyphen) {
|
|
for (uint32_t j = aWordState->mostRecentBoundary; j <= i; j++) {
|
|
if (aHyphenBuffer[j - aStart] == HyphenType::Explicit) {
|
|
aHyphenBuffer[j - aStart] = HyphenType::None;
|
|
}
|
|
}
|
|
}
|
|
aWordState->mostRecentBoundary = i;
|
|
aWordState->hasManualHyphen = false;
|
|
aWordState->hasAutoHyphen = false;
|
|
aWordState->hasExplicitHyphen = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t gfxTextRun::BreakAndMeasureText(
|
|
uint32_t aStart, uint32_t aMaxLength, bool aLineBreakBefore,
|
|
gfxFloat aWidth, const PropertyProvider& aProvider,
|
|
SuppressBreak aSuppressBreak, gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget, bool aCanWordWrap, bool aCanWhitespaceWrap,
|
|
bool aIsBreakSpaces,
|
|
// output params:
|
|
TrimmableWS* aOutTrimmableWhitespace, Metrics& aOutMetrics,
|
|
bool& aOutUsedHyphenation, uint32_t& aOutLastBreak,
|
|
gfxBreakPriority& aBreakPriority) {
|
|
aMaxLength = std::min(aMaxLength, GetLength() - aStart);
|
|
|
|
NS_ASSERTION(aStart + aMaxLength <= GetLength(), "Substring out of range");
|
|
|
|
Range bufferRange(
|
|
aStart, aStart + std::min<uint32_t>(aMaxLength, MEASUREMENT_BUFFER_SIZE));
|
|
PropertyProvider::Spacing spacingBuffer[MEASUREMENT_BUFFER_SIZE];
|
|
bool haveSpacing = !!(mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_SPACING);
|
|
if (haveSpacing) {
|
|
GetAdjustedSpacing(this, bufferRange, aProvider, spacingBuffer);
|
|
}
|
|
AutoTArray<HyphenType, 4096> hyphenBuffer;
|
|
HyphenationState wordState;
|
|
wordState.mostRecentBoundary = aStart;
|
|
bool haveHyphenation =
|
|
(aProvider.GetHyphensOption() == StyleHyphens::Auto ||
|
|
(aProvider.GetHyphensOption() == StyleHyphens::Manual &&
|
|
!!(mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_HYPHEN_BREAKS)));
|
|
if (haveHyphenation) {
|
|
if (hyphenBuffer.AppendElements(bufferRange.Length(), fallible)) {
|
|
aProvider.GetHyphenationBreaks(bufferRange, hyphenBuffer.Elements());
|
|
if (aProvider.GetHyphensOption() == StyleHyphens::Auto) {
|
|
ClassifyAutoHyphenations(aStart, bufferRange, hyphenBuffer, &wordState);
|
|
}
|
|
} else {
|
|
haveHyphenation = false;
|
|
}
|
|
}
|
|
|
|
gfxFloat width = 0;
|
|
gfxFloat advance = 0;
|
|
// The number of space characters that can be trimmed or hang at a soft-wrap
|
|
uint32_t trimmableChars = 0;
|
|
// The amount of space removed by ignoring trimmableChars
|
|
gfxFloat trimmableAdvance = 0;
|
|
int32_t lastBreak = -1;
|
|
int32_t lastBreakTrimmableChars = -1;
|
|
gfxFloat lastBreakTrimmableAdvance = -1;
|
|
// Cache the last candidate break
|
|
int32_t lastCandidateBreak = -1;
|
|
int32_t lastCandidateBreakTrimmableChars = -1;
|
|
gfxFloat lastCandidateBreakTrimmableAdvance = -1;
|
|
bool lastCandidateBreakUsedHyphenation = false;
|
|
gfxBreakPriority lastCandidateBreakPriority = gfxBreakPriority::eNoBreak;
|
|
bool aborted = false;
|
|
uint32_t end = aStart + aMaxLength;
|
|
bool lastBreakUsedHyphenation = false;
|
|
Range ligatureRange(aStart, end);
|
|
ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
// We may need to move `i` backwards in the following loop, and re-scan
|
|
// part of the textrun; we'll use `rescanLimit` so we can tell when that
|
|
// is happening: if `i < rescanLimit` then we're rescanning.
|
|
uint32_t rescanLimit = aStart;
|
|
for (uint32_t i = aStart; i < end; ++i) {
|
|
if (i >= bufferRange.end) {
|
|
// Fetch more spacing and hyphenation data
|
|
uint32_t oldHyphenBufferLength = hyphenBuffer.Length();
|
|
bufferRange.start = i;
|
|
bufferRange.end =
|
|
std::min(aStart + aMaxLength, i + MEASUREMENT_BUFFER_SIZE);
|
|
// For spacing, we always overwrite the old data with the newly
|
|
// fetched one. However, for hyphenation, hyphenation data sometimes
|
|
// depends on the context in every word (if "hyphens: auto" is set).
|
|
// To ensure we get enough information between neighboring buffers,
|
|
// we grow the hyphenBuffer instead of overwrite it.
|
|
// NOTE that this means bufferRange does not correspond to the
|
|
// entire hyphenBuffer, but only to the most recently added portion.
|
|
// Therefore, we need to add the old length to hyphenBuffer.Elements()
|
|
// when getting more data.
|
|
if (haveSpacing) {
|
|
GetAdjustedSpacing(this, bufferRange, aProvider, spacingBuffer);
|
|
}
|
|
if (haveHyphenation) {
|
|
if (hyphenBuffer.AppendElements(bufferRange.Length(), fallible)) {
|
|
aProvider.GetHyphenationBreaks(
|
|
bufferRange, hyphenBuffer.Elements() + oldHyphenBufferLength);
|
|
if (aProvider.GetHyphensOption() == StyleHyphens::Auto) {
|
|
uint32_t prevMostRecentWordBoundary = wordState.mostRecentBoundary;
|
|
ClassifyAutoHyphenations(aStart, bufferRange, hyphenBuffer,
|
|
&wordState);
|
|
// If the buffer boundary is in the middle of a word,
|
|
// we need to go back to the start of the current word.
|
|
// So, we can correct the wrong candidates that we set
|
|
// in the previous runs of the loop.
|
|
if (prevMostRecentWordBoundary < oldHyphenBufferLength) {
|
|
rescanLimit = i;
|
|
i = prevMostRecentWordBoundary - 1;
|
|
continue;
|
|
}
|
|
}
|
|
} else {
|
|
haveHyphenation = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// There can't be a word-wrap break opportunity at the beginning of the
|
|
// line: if the width is too small for even one character to fit, it
|
|
// could be the first and last break opportunity on the line, and that
|
|
// would trigger an infinite loop.
|
|
if (aSuppressBreak != eSuppressAllBreaks &&
|
|
(aSuppressBreak != eSuppressInitialBreak || i > aStart)) {
|
|
bool atNaturalBreak = mCharacterGlyphs[i].CanBreakBefore() ==
|
|
CompressedGlyph::FLAG_BREAK_TYPE_NORMAL;
|
|
// atHyphenationBreak indicates we're at a "soft" hyphen, where an extra
|
|
// hyphen glyph will need to be painted. It is NOT set for breaks at an
|
|
// explicit hyphen present in the text.
|
|
//
|
|
// NOTE(emilio): If you change this condition you also need to change
|
|
// nsTextFrame::AddInlineMinISizeForFlow to match.
|
|
bool atHyphenationBreak = !atNaturalBreak && haveHyphenation &&
|
|
(!aLineBreakBefore || i > aStart) &&
|
|
IsOptionalHyphenBreak(hyphenBuffer[i - aStart]);
|
|
bool atAutoHyphenWithManualHyphenInSameWord =
|
|
atHyphenationBreak &&
|
|
hyphenBuffer[i - aStart] == HyphenType::AutoWithManualInSameWord;
|
|
bool atBreak = atNaturalBreak || atHyphenationBreak;
|
|
bool wordWrapping =
|
|
(aCanWordWrap ||
|
|
(aCanWhitespaceWrap &&
|
|
mCharacterGlyphs[i].CanBreakBefore() ==
|
|
CompressedGlyph::FLAG_BREAK_TYPE_EMERGENCY_WRAP)) &&
|
|
mCharacterGlyphs[i].IsClusterStart() &&
|
|
aBreakPriority <= gfxBreakPriority::eWordWrapBreak;
|
|
|
|
bool whitespaceWrapping = false;
|
|
if (i > aStart) {
|
|
// The spec says the breaking opportunity is *after* whitespace.
|
|
auto const& g = mCharacterGlyphs[i - 1];
|
|
whitespaceWrapping =
|
|
aIsBreakSpaces &&
|
|
(g.CharIsSpace() || g.CharIsTab() || g.CharIsNewline());
|
|
}
|
|
|
|
if (atBreak || wordWrapping || whitespaceWrapping) {
|
|
gfxFloat hyphenatedAdvance = advance;
|
|
if (atHyphenationBreak) {
|
|
hyphenatedAdvance += aProvider.GetHyphenWidth();
|
|
}
|
|
|
|
if (lastBreak < 0 ||
|
|
width + hyphenatedAdvance - trimmableAdvance <= aWidth) {
|
|
// We can break here.
|
|
lastBreak = i;
|
|
lastBreakTrimmableChars = trimmableChars;
|
|
lastBreakTrimmableAdvance = trimmableAdvance;
|
|
lastBreakUsedHyphenation = atHyphenationBreak;
|
|
aBreakPriority = (atBreak || whitespaceWrapping)
|
|
? gfxBreakPriority::eNormalBreak
|
|
: gfxBreakPriority::eWordWrapBreak;
|
|
}
|
|
|
|
width += advance;
|
|
advance = 0;
|
|
if (width - trimmableAdvance > aWidth) {
|
|
// No more text fits. Abort
|
|
aborted = true;
|
|
break;
|
|
}
|
|
// There are various kinds of break opportunities:
|
|
// 1. word wrap break,
|
|
// 2. natural break,
|
|
// 3. manual hyphenation break,
|
|
// 4. auto hyphenation break without any manual hyphenation
|
|
// in the same word,
|
|
// 5. auto hyphenation break with another manual hyphenation
|
|
// in the same word.
|
|
// Allow all of them except the last one to be a candidate.
|
|
// So, we can ensure that we don't use an automatic
|
|
// hyphenation opportunity within a word that contains another
|
|
// manual hyphenation, unless it is the only choice.
|
|
if (wordWrapping || !atAutoHyphenWithManualHyphenInSameWord) {
|
|
lastCandidateBreak = lastBreak;
|
|
lastCandidateBreakTrimmableChars = lastBreakTrimmableChars;
|
|
lastCandidateBreakTrimmableAdvance = lastBreakTrimmableAdvance;
|
|
lastCandidateBreakUsedHyphenation = lastBreakUsedHyphenation;
|
|
lastCandidateBreakPriority = aBreakPriority;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we're re-scanning part of a word (to re-process potential
|
|
// hyphenation types) then we don't want to accumulate widths again
|
|
// for the characters that were already added to `advance`.
|
|
if (i < rescanLimit) {
|
|
continue;
|
|
}
|
|
|
|
gfxFloat charAdvance;
|
|
if (i >= ligatureRange.start && i < ligatureRange.end) {
|
|
charAdvance = GetAdvanceForGlyphs(Range(i, i + 1));
|
|
if (haveSpacing) {
|
|
PropertyProvider::Spacing* space =
|
|
&spacingBuffer[i - bufferRange.start];
|
|
charAdvance += space->mBefore + space->mAfter;
|
|
}
|
|
} else {
|
|
charAdvance = ComputePartialLigatureWidth(Range(i, i + 1), &aProvider);
|
|
}
|
|
|
|
advance += charAdvance;
|
|
if (aOutTrimmableWhitespace) {
|
|
if (mCharacterGlyphs[i].CharIsSpace()) {
|
|
++trimmableChars;
|
|
trimmableAdvance += charAdvance;
|
|
} else {
|
|
trimmableAdvance = 0;
|
|
trimmableChars = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!aborted) {
|
|
width += advance;
|
|
}
|
|
|
|
// There are three possibilities:
|
|
// 1) all the text fit (width <= aWidth)
|
|
// 2) some of the text fit up to a break opportunity (width > aWidth &&
|
|
// lastBreak >= 0)
|
|
// 3) none of the text fits before a break opportunity (width > aWidth &&
|
|
// lastBreak < 0)
|
|
uint32_t charsFit;
|
|
aOutUsedHyphenation = false;
|
|
if (width - trimmableAdvance <= aWidth) {
|
|
charsFit = aMaxLength;
|
|
} else if (lastBreak >= 0) {
|
|
if (lastCandidateBreak >= 0 && lastCandidateBreak != lastBreak) {
|
|
lastBreak = lastCandidateBreak;
|
|
lastBreakTrimmableChars = lastCandidateBreakTrimmableChars;
|
|
lastBreakTrimmableAdvance = lastCandidateBreakTrimmableAdvance;
|
|
lastBreakUsedHyphenation = lastCandidateBreakUsedHyphenation;
|
|
aBreakPriority = lastCandidateBreakPriority;
|
|
}
|
|
charsFit = lastBreak - aStart;
|
|
trimmableChars = lastBreakTrimmableChars;
|
|
trimmableAdvance = lastBreakTrimmableAdvance;
|
|
aOutUsedHyphenation = lastBreakUsedHyphenation;
|
|
} else {
|
|
charsFit = aMaxLength;
|
|
}
|
|
|
|
// Get the overall metrics of the range that fit (including any potentially
|
|
// trimmable or hanging whitespace).
|
|
aOutMetrics = MeasureText(Range(aStart, aStart + charsFit), aBoundingBoxType,
|
|
aRefDrawTarget, &aProvider);
|
|
|
|
if (aOutTrimmableWhitespace) {
|
|
aOutTrimmableWhitespace->mAdvance = trimmableAdvance;
|
|
aOutTrimmableWhitespace->mCount = trimmableChars;
|
|
}
|
|
|
|
if (charsFit == aMaxLength) {
|
|
if (lastBreak < 0) {
|
|
aOutLastBreak = UINT32_MAX;
|
|
} else {
|
|
aOutLastBreak = lastBreak - aStart;
|
|
}
|
|
}
|
|
|
|
return charsFit;
|
|
}
|
|
|
|
gfxFloat gfxTextRun::GetAdvanceWidth(
|
|
Range aRange, const PropertyProvider* aProvider,
|
|
PropertyProvider::Spacing* aSpacing) const {
|
|
NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
|
|
|
|
Range ligatureRange = aRange;
|
|
bool adjusted = ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
gfxFloat result =
|
|
adjusted ? ComputePartialLigatureWidth(
|
|
Range(aRange.start, ligatureRange.start), aProvider) +
|
|
ComputePartialLigatureWidth(
|
|
Range(ligatureRange.end, aRange.end), aProvider)
|
|
: 0.0;
|
|
|
|
if (aSpacing) {
|
|
aSpacing->mBefore = aSpacing->mAfter = 0;
|
|
}
|
|
|
|
// Account for all remaining spacing here. This is more efficient than
|
|
// processing it along with the glyphs.
|
|
if (aProvider && (mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_SPACING)) {
|
|
uint32_t i;
|
|
AutoTArray<PropertyProvider::Spacing, 200> spacingBuffer;
|
|
if (spacingBuffer.AppendElements(aRange.Length(), fallible)) {
|
|
GetAdjustedSpacing(this, ligatureRange, *aProvider,
|
|
spacingBuffer.Elements());
|
|
for (i = 0; i < ligatureRange.Length(); ++i) {
|
|
PropertyProvider::Spacing* space = &spacingBuffer[i];
|
|
result += space->mBefore + space->mAfter;
|
|
}
|
|
if (aSpacing) {
|
|
aSpacing->mBefore = spacingBuffer[0].mBefore;
|
|
aSpacing->mAfter = spacingBuffer.LastElement().mAfter;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result + GetAdvanceForGlyphs(ligatureRange);
|
|
}
|
|
|
|
gfxFloat gfxTextRun::GetMinAdvanceWidth(Range aRange) {
|
|
MOZ_ASSERT(aRange.end <= GetLength(), "Substring out of range");
|
|
|
|
Range ligatureRange = aRange;
|
|
bool adjusted = ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
gfxFloat result =
|
|
adjusted
|
|
? std::max(ComputePartialLigatureWidth(
|
|
Range(aRange.start, ligatureRange.start), nullptr),
|
|
ComputePartialLigatureWidth(
|
|
Range(ligatureRange.end, aRange.end), nullptr))
|
|
: 0.0;
|
|
|
|
// Compute min advance width by assuming each grapheme cluster takes its own
|
|
// line.
|
|
gfxFloat clusterAdvance = 0;
|
|
for (uint32_t i = ligatureRange.start; i < ligatureRange.end; ++i) {
|
|
if (mCharacterGlyphs[i].CharIsSpace()) {
|
|
// Skip space char to prevent its advance width contributing to the
|
|
// result. That is, don't consider a space can be in its own line.
|
|
continue;
|
|
}
|
|
clusterAdvance += GetAdvanceForGlyph(i);
|
|
if (i + 1 == ligatureRange.end || IsClusterStart(i + 1)) {
|
|
result = std::max(result, clusterAdvance);
|
|
clusterAdvance = 0;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
bool gfxTextRun::SetLineBreaks(Range aRange, bool aLineBreakBefore,
|
|
bool aLineBreakAfter,
|
|
gfxFloat* aAdvanceWidthDelta) {
|
|
// Do nothing because our shaping does not currently take linebreaks into
|
|
// account. There is no change in advance width.
|
|
if (aAdvanceWidthDelta) {
|
|
*aAdvanceWidthDelta = 0;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const gfxTextRun::GlyphRun* gfxTextRun::FindFirstGlyphRunContaining(
|
|
uint32_t aOffset) const {
|
|
MOZ_ASSERT(aOffset <= GetLength(), "Bad offset looking for glyphrun");
|
|
MOZ_ASSERT(GetLength() == 0 || !mGlyphRuns.IsEmpty(),
|
|
"non-empty text but no glyph runs present!");
|
|
if (mGlyphRuns.Length() <= 1) {
|
|
return mGlyphRuns.begin();
|
|
}
|
|
if (aOffset == GetLength()) {
|
|
return mGlyphRuns.end() - 1;
|
|
}
|
|
const auto* start = mGlyphRuns.begin();
|
|
const auto* limit = mGlyphRuns.end();
|
|
while (limit - start > 1) {
|
|
const auto* mid = start + (limit - start) / 2;
|
|
if (mid->mCharacterOffset <= aOffset) {
|
|
start = mid;
|
|
} else {
|
|
limit = mid;
|
|
}
|
|
}
|
|
MOZ_ASSERT(start->mCharacterOffset <= aOffset,
|
|
"Hmm, something went wrong, aOffset should have been found");
|
|
return start;
|
|
}
|
|
|
|
void gfxTextRun::AddGlyphRun(gfxFont* aFont, FontMatchType aMatchType,
|
|
uint32_t aUTF16Offset, bool aForceNewRun,
|
|
gfx::ShapedTextFlags aOrientation, bool aIsCJK) {
|
|
MOZ_ASSERT(aFont, "adding glyph run for null font!");
|
|
MOZ_ASSERT(aOrientation != gfx::ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED,
|
|
"mixed orientation should have been resolved");
|
|
if (!aFont) {
|
|
return;
|
|
}
|
|
|
|
if (mGlyphRuns.IsEmpty()) {
|
|
mGlyphRuns.AppendElement(
|
|
GlyphRun{aFont, aUTF16Offset, aOrientation, aMatchType, aIsCJK});
|
|
return;
|
|
}
|
|
|
|
uint32_t numGlyphRuns = mGlyphRuns.Length();
|
|
if (!aForceNewRun) {
|
|
GlyphRun* lastGlyphRun = &mGlyphRuns.LastElement();
|
|
|
|
MOZ_ASSERT(lastGlyphRun->mCharacterOffset <= aUTF16Offset,
|
|
"Glyph runs out of order (and run not forced)");
|
|
|
|
// Don't append a run if the font is already the one we want
|
|
if (lastGlyphRun->Matches(aFont, aOrientation, aIsCJK, aMatchType)) {
|
|
return;
|
|
}
|
|
|
|
// If the offset has not changed, avoid leaving a zero-length run
|
|
// by overwriting the last entry instead of appending...
|
|
if (lastGlyphRun->mCharacterOffset == aUTF16Offset) {
|
|
// ...except that if the run before the last entry had the same
|
|
// font as the new one wants, merge with it instead of creating
|
|
// adjacent runs with the same font
|
|
if (numGlyphRuns > 1 && mGlyphRuns[numGlyphRuns - 2].Matches(
|
|
aFont, aOrientation, aIsCJK, aMatchType)) {
|
|
mGlyphRuns.TruncateLength(numGlyphRuns - 1);
|
|
return;
|
|
}
|
|
|
|
lastGlyphRun->SetProperties(aFont, aOrientation, aIsCJK, aMatchType);
|
|
return;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(
|
|
aForceNewRun || numGlyphRuns > 0 || aUTF16Offset == 0,
|
|
"First run doesn't cover the first character (and run not forced)?");
|
|
|
|
mGlyphRuns.AppendElement(
|
|
GlyphRun{aFont, aUTF16Offset, aOrientation, aMatchType, aIsCJK});
|
|
}
|
|
|
|
void gfxTextRun::SanitizeGlyphRuns() {
|
|
if (mGlyphRuns.Length() < 2) {
|
|
return;
|
|
}
|
|
|
|
auto& runs = mGlyphRuns.Array();
|
|
|
|
// The runs are almost certain to be already sorted, so it's worth avoiding
|
|
// the Sort() call if possible.
|
|
bool isSorted = true;
|
|
uint32_t prevOffset = 0;
|
|
for (const auto& r : runs) {
|
|
if (r.mCharacterOffset < prevOffset) {
|
|
isSorted = false;
|
|
break;
|
|
}
|
|
prevOffset = r.mCharacterOffset;
|
|
}
|
|
if (!isSorted) {
|
|
runs.Sort(GlyphRunOffsetComparator());
|
|
}
|
|
|
|
// Coalesce adjacent glyph runs that have the same properties, and eliminate
|
|
// any empty runs.
|
|
GlyphRun* prevRun = nullptr;
|
|
const CompressedGlyph* charGlyphs = mCharacterGlyphs;
|
|
|
|
runs.RemoveElementsBy([&](GlyphRun& aRun) -> bool {
|
|
// First run is always retained.
|
|
if (!prevRun) {
|
|
prevRun = &aRun;
|
|
return false;
|
|
}
|
|
|
|
// Merge any run whose properties match its predecessor.
|
|
if (prevRun->Matches(aRun.mFont, aRun.mOrientation, aRun.mIsCJK,
|
|
aRun.mMatchType)) {
|
|
return true;
|
|
}
|
|
|
|
if (prevRun->mCharacterOffset >= aRun.mCharacterOffset) {
|
|
// Preceding run is empty (or has become so due to the adjusting for
|
|
// ligature boundaries), so we will overwrite it with this one, which
|
|
// will then be discarded.
|
|
*prevRun = aRun;
|
|
return true;
|
|
}
|
|
|
|
// If any glyph run starts with ligature-continuation characters, we need to
|
|
// advance it to the first "real" character to avoid drawing partial
|
|
// ligature glyphs from wrong font (seen with U+FEFF in reftest 474417-1, as
|
|
// Core Text eliminates the glyph, which makes it appear as if a ligature
|
|
// has been formed)
|
|
while (charGlyphs[aRun.mCharacterOffset].IsLigatureContinuation() &&
|
|
aRun.mCharacterOffset < GetLength()) {
|
|
aRun.mCharacterOffset++;
|
|
}
|
|
|
|
// We're keeping another run, so update prevRun pointer to refer to it (in
|
|
// its new position).
|
|
++prevRun;
|
|
return false;
|
|
});
|
|
|
|
MOZ_ASSERT(prevRun == &runs.LastElement(), "lost track of prevRun!");
|
|
|
|
// Drop any trailing empty run.
|
|
if (runs.Length() > 1 && prevRun->mCharacterOffset == GetLength()) {
|
|
runs.RemoveLastElement();
|
|
}
|
|
|
|
MOZ_ASSERT(!runs.IsEmpty());
|
|
if (runs.Length() == 1) {
|
|
mGlyphRuns.ConvertToElement();
|
|
}
|
|
}
|
|
|
|
void gfxTextRun::CopyGlyphDataFrom(gfxShapedWord* aShapedWord,
|
|
uint32_t aOffset) {
|
|
uint32_t wordLen = aShapedWord->GetLength();
|
|
MOZ_ASSERT(aOffset + wordLen <= GetLength(), "word overruns end of textrun");
|
|
|
|
CompressedGlyph* charGlyphs = GetCharacterGlyphs();
|
|
const CompressedGlyph* wordGlyphs = aShapedWord->GetCharacterGlyphs();
|
|
if (aShapedWord->HasDetailedGlyphs()) {
|
|
for (uint32_t i = 0; i < wordLen; ++i, ++aOffset) {
|
|
const CompressedGlyph& g = wordGlyphs[i];
|
|
if (!g.IsSimpleGlyph()) {
|
|
const DetailedGlyph* details =
|
|
g.GetGlyphCount() > 0 ? aShapedWord->GetDetailedGlyphs(i) : nullptr;
|
|
SetDetailedGlyphs(aOffset, g.GetGlyphCount(), details);
|
|
}
|
|
charGlyphs[aOffset] = g;
|
|
}
|
|
} else {
|
|
memcpy(charGlyphs + aOffset, wordGlyphs, wordLen * sizeof(CompressedGlyph));
|
|
}
|
|
}
|
|
|
|
void gfxTextRun::CopyGlyphDataFrom(gfxTextRun* aSource, Range aRange,
|
|
uint32_t aDest) {
|
|
MOZ_ASSERT(aRange.end <= aSource->GetLength(),
|
|
"Source substring out of range");
|
|
MOZ_ASSERT(aDest + aRange.Length() <= GetLength(),
|
|
"Destination substring out of range");
|
|
|
|
if (aSource->mDontSkipDrawing) {
|
|
mDontSkipDrawing = true;
|
|
}
|
|
|
|
// Copy base glyph data, and DetailedGlyph data where present
|
|
const CompressedGlyph* srcGlyphs = aSource->mCharacterGlyphs + aRange.start;
|
|
CompressedGlyph* dstGlyphs = mCharacterGlyphs + aDest;
|
|
for (uint32_t i = 0; i < aRange.Length(); ++i) {
|
|
CompressedGlyph g = srcGlyphs[i];
|
|
g.SetCanBreakBefore(!g.IsClusterStart()
|
|
? CompressedGlyph::FLAG_BREAK_TYPE_NONE
|
|
: dstGlyphs[i].CanBreakBefore());
|
|
if (!g.IsSimpleGlyph()) {
|
|
uint32_t count = g.GetGlyphCount();
|
|
if (count > 0) {
|
|
// DetailedGlyphs allocation is infallible, so this should never be
|
|
// null unless the source textrun is somehow broken.
|
|
DetailedGlyph* src = aSource->GetDetailedGlyphs(i + aRange.start);
|
|
MOZ_ASSERT(src, "missing DetailedGlyphs?");
|
|
if (src) {
|
|
DetailedGlyph* dst = AllocateDetailedGlyphs(i + aDest, count);
|
|
::memcpy(dst, src, count * sizeof(DetailedGlyph));
|
|
} else {
|
|
g.SetMissing();
|
|
}
|
|
}
|
|
}
|
|
dstGlyphs[i] = g;
|
|
}
|
|
|
|
// Copy glyph runs
|
|
#ifdef DEBUG
|
|
GlyphRun* prevRun = nullptr;
|
|
#endif
|
|
for (GlyphRunIterator iter(aSource, aRange); !iter.AtEnd(); iter.NextRun()) {
|
|
gfxFont* font = iter.GlyphRun()->mFont;
|
|
MOZ_ASSERT(!prevRun || !prevRun->Matches(iter.GlyphRun()->mFont,
|
|
iter.GlyphRun()->mOrientation,
|
|
iter.GlyphRun()->mIsCJK,
|
|
FontMatchType::Kind::kUnspecified),
|
|
"Glyphruns not coalesced?");
|
|
#ifdef DEBUG
|
|
prevRun = const_cast<GlyphRun*>(iter.GlyphRun());
|
|
uint32_t end = iter.StringEnd();
|
|
#endif
|
|
uint32_t start = iter.StringStart();
|
|
|
|
// These used to be NS_ASSERTION()s, but WARNING is more appropriate.
|
|
// Although it's unusual (and not desirable), it's possible for us to assign
|
|
// different fonts to a base character and a following diacritic.
|
|
// Example on OSX 10.5/10.6 with default fonts installed:
|
|
// data:text/html,<p style="font-family:helvetica, arial, sans-serif;">
|
|
// &%23x043E;&%23x0486;&%23x20;&%23x043E;&%23x0486;
|
|
// This means the rendering of the cluster will probably not be very good,
|
|
// but it's the best we can do for now if the specified font only covered
|
|
// the initial base character and not its applied marks.
|
|
NS_WARNING_ASSERTION(aSource->IsClusterStart(start),
|
|
"Started font run in the middle of a cluster");
|
|
NS_WARNING_ASSERTION(
|
|
end == aSource->GetLength() || aSource->IsClusterStart(end),
|
|
"Ended font run in the middle of a cluster");
|
|
|
|
AddGlyphRun(font, iter.GlyphRun()->mMatchType, start - aRange.start + aDest,
|
|
false, iter.GlyphRun()->mOrientation, iter.GlyphRun()->mIsCJK);
|
|
}
|
|
}
|
|
|
|
void gfxTextRun::ClearGlyphsAndCharacters() {
|
|
ResetGlyphRuns();
|
|
memset(reinterpret_cast<char*>(mCharacterGlyphs), 0,
|
|
mLength * sizeof(CompressedGlyph));
|
|
mDetailedGlyphs = nullptr;
|
|
}
|
|
|
|
void gfxTextRun::SetSpaceGlyph(gfxFont* aFont, DrawTarget* aDrawTarget,
|
|
uint32_t aCharIndex,
|
|
gfx::ShapedTextFlags aOrientation) {
|
|
if (SetSpaceGlyphIfSimple(aFont, aCharIndex, ' ', aOrientation)) {
|
|
return;
|
|
}
|
|
|
|
gfx::ShapedTextFlags flags =
|
|
gfx::ShapedTextFlags::TEXT_IS_8BIT | aOrientation;
|
|
bool vertical =
|
|
!!(GetFlags() & gfx::ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT);
|
|
gfxFontShaper::RoundingFlags roundingFlags =
|
|
aFont->GetRoundOffsetsToPixels(aDrawTarget);
|
|
aFont->ProcessSingleSpaceShapedWord(
|
|
aDrawTarget, vertical, mAppUnitsPerDevUnit, flags, roundingFlags,
|
|
[&](gfxShapedWord* aShapedWord) {
|
|
const GlyphRun* prevRun = TrailingGlyphRun();
|
|
bool isCJK = prevRun && prevRun->mFont == aFont &&
|
|
prevRun->mOrientation == aOrientation
|
|
? prevRun->mIsCJK
|
|
: false;
|
|
AddGlyphRun(aFont, FontMatchType::Kind::kUnspecified, aCharIndex, false,
|
|
aOrientation, isCJK);
|
|
CopyGlyphDataFrom(aShapedWord, aCharIndex);
|
|
GetCharacterGlyphs()[aCharIndex].SetIsSpace();
|
|
});
|
|
}
|
|
|
|
bool gfxTextRun::SetSpaceGlyphIfSimple(gfxFont* aFont, uint32_t aCharIndex,
|
|
char16_t aSpaceChar,
|
|
gfx::ShapedTextFlags aOrientation) {
|
|
uint32_t spaceGlyph = aFont->GetSpaceGlyph();
|
|
if (!spaceGlyph || !CompressedGlyph::IsSimpleGlyphID(spaceGlyph)) {
|
|
return false;
|
|
}
|
|
|
|
gfxFont::Orientation fontOrientation =
|
|
(aOrientation & gfx::ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT)
|
|
? nsFontMetrics::eVertical
|
|
: nsFontMetrics::eHorizontal;
|
|
uint32_t spaceWidthAppUnits = NS_lroundf(
|
|
aFont->GetMetrics(fontOrientation).spaceWidth * mAppUnitsPerDevUnit);
|
|
if (!CompressedGlyph::IsSimpleAdvance(spaceWidthAppUnits)) {
|
|
return false;
|
|
}
|
|
|
|
const GlyphRun* prevRun = TrailingGlyphRun();
|
|
bool isCJK = prevRun && prevRun->mFont == aFont &&
|
|
prevRun->mOrientation == aOrientation
|
|
? prevRun->mIsCJK
|
|
: false;
|
|
AddGlyphRun(aFont, FontMatchType::Kind::kUnspecified, aCharIndex, false,
|
|
aOrientation, isCJK);
|
|
CompressedGlyph g =
|
|
CompressedGlyph::MakeSimpleGlyph(spaceWidthAppUnits, spaceGlyph);
|
|
if (aSpaceChar == ' ') {
|
|
g.SetIsSpace();
|
|
}
|
|
GetCharacterGlyphs()[aCharIndex] = g;
|
|
return true;
|
|
}
|
|
|
|
void gfxTextRun::FetchGlyphExtents(DrawTarget* aRefDrawTarget) const {
|
|
bool needsGlyphExtents = NeedsGlyphExtents();
|
|
if (!needsGlyphExtents && !mDetailedGlyphs) {
|
|
return;
|
|
}
|
|
|
|
uint32_t runCount;
|
|
const GlyphRun* glyphRuns = GetGlyphRuns(&runCount);
|
|
CompressedGlyph* charGlyphs = mCharacterGlyphs;
|
|
for (uint32_t i = 0; i < runCount; ++i) {
|
|
const GlyphRun& run = glyphRuns[i];
|
|
gfxFont* font = run.mFont;
|
|
if (MOZ_UNLIKELY(font->GetStyle()->AdjustedSizeMustBeZero())) {
|
|
continue;
|
|
}
|
|
|
|
uint32_t start = run.mCharacterOffset;
|
|
uint32_t end =
|
|
i + 1 < runCount ? glyphRuns[i + 1].mCharacterOffset : GetLength();
|
|
gfxGlyphExtents* extents =
|
|
font->GetOrCreateGlyphExtents(mAppUnitsPerDevUnit);
|
|
|
|
AutoReadLock lock(extents->mLock);
|
|
for (uint32_t j = start; j < end; ++j) {
|
|
const gfxTextRun::CompressedGlyph* glyphData = &charGlyphs[j];
|
|
if (glyphData->IsSimpleGlyph()) {
|
|
// If we're in speed mode, don't set up glyph extents here; we'll
|
|
// just return "optimistic" glyph bounds later
|
|
if (needsGlyphExtents) {
|
|
uint32_t glyphIndex = glyphData->GetSimpleGlyph();
|
|
if (!extents->IsGlyphKnownLocked(glyphIndex)) {
|
|
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
|
|
++gGlyphExtentsSetupEagerSimple;
|
|
#endif
|
|
extents->mLock.ReadUnlock();
|
|
font->SetupGlyphExtents(aRefDrawTarget, glyphIndex, false, extents);
|
|
extents->mLock.ReadLock();
|
|
}
|
|
}
|
|
} else if (!glyphData->IsMissing()) {
|
|
uint32_t glyphCount = glyphData->GetGlyphCount();
|
|
if (glyphCount == 0) {
|
|
continue;
|
|
}
|
|
const gfxTextRun::DetailedGlyph* details = GetDetailedGlyphs(j);
|
|
if (!details) {
|
|
continue;
|
|
}
|
|
for (uint32_t k = 0; k < glyphCount; ++k, ++details) {
|
|
uint32_t glyphIndex = details->mGlyphID;
|
|
if (!extents->IsGlyphKnownWithTightExtentsLocked(glyphIndex)) {
|
|
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
|
|
++gGlyphExtentsSetupEagerTight;
|
|
#endif
|
|
extents->mLock.ReadUnlock();
|
|
font->SetupGlyphExtents(aRefDrawTarget, glyphIndex, true, extents);
|
|
extents->mLock.ReadLock();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t gfxTextRun::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) {
|
|
size_t total = mGlyphRuns.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
|
|
if (mDetailedGlyphs) {
|
|
total += mDetailedGlyphs->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
size_t gfxTextRun::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) {
|
|
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
void gfxTextRun::Dump(FILE* out) {
|
|
# define APPEND_FLAG(string_, enum_, field_, flag_) \
|
|
if (field_ & enum_::flag_) { \
|
|
string_.AppendPrintf(remaining != field_ ? " %s" : "%s", #flag_); \
|
|
remaining &= ~enum_::flag_; \
|
|
}
|
|
# define APPEND_FLAGS(string_, enum_, field_, flags_) \
|
|
{ \
|
|
auto remaining = field_; \
|
|
MOZ_FOR_EACH(APPEND_FLAG, (string_, enum_, field_, ), flags_) \
|
|
if (int(remaining)) { \
|
|
string_.AppendPrintf(" %s(0x%0x)", #enum_, int(remaining)); \
|
|
} \
|
|
}
|
|
|
|
nsCString flagsString;
|
|
ShapedTextFlags orient = mFlags & ShapedTextFlags::TEXT_ORIENT_MASK;
|
|
ShapedTextFlags otherFlags = mFlags & ~ShapedTextFlags::TEXT_ORIENT_MASK;
|
|
APPEND_FLAGS(flagsString, ShapedTextFlags, otherFlags,
|
|
(TEXT_IS_RTL, TEXT_ENABLE_SPACING, TEXT_IS_8BIT,
|
|
TEXT_ENABLE_HYPHEN_BREAKS, TEXT_NEED_BOUNDING_BOX,
|
|
TEXT_DISABLE_OPTIONAL_LIGATURES, TEXT_OPTIMIZE_SPEED,
|
|
TEXT_HIDE_CONTROL_CHARACTERS, TEXT_TRAILING_ARABICCHAR,
|
|
TEXT_INCOMING_ARABICCHAR, TEXT_USE_MATH_SCRIPT))
|
|
|
|
if (orient != ShapedTextFlags::TEXT_ORIENT_HORIZONTAL &&
|
|
!flagsString.IsEmpty()) {
|
|
flagsString += ' ';
|
|
}
|
|
|
|
switch (orient) {
|
|
case ShapedTextFlags::TEXT_ORIENT_HORIZONTAL:
|
|
break;
|
|
case ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT:
|
|
flagsString += "TEXT_ORIENT_VERTICAL_UPRIGHT";
|
|
break;
|
|
case ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT:
|
|
flagsString += "TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT";
|
|
break;
|
|
case ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED:
|
|
flagsString += "TEXT_ORIENT_VERTICAL_MIXED";
|
|
break;
|
|
case ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_LEFT:
|
|
flagsString += "TEXT_ORIENT_VERTICAL_SIDEWAYS_LEFT";
|
|
break;
|
|
default:
|
|
flagsString.AppendPrintf("UNKNOWN_TEXT_ORIENT_MASK(0x%0x)", int(orient));
|
|
break;
|
|
}
|
|
|
|
nsCString flags2String;
|
|
APPEND_FLAGS(
|
|
flags2String, nsTextFrameUtils::Flags, mFlags2,
|
|
(HasTab, HasShy, HasNewline, DontSkipDrawingForPendingUserFonts,
|
|
IsSimpleFlow, IncomingWhitespace, TrailingWhitespace,
|
|
CompressedLeadingWhitespace, NoBreaks, IsTransformed, HasTrailingBreak,
|
|
IsSingleCharMi, MightHaveGlyphChanges, RunSizeAccounted))
|
|
|
|
# undef APPEND_FLAGS
|
|
# undef APPEND_FLAG
|
|
|
|
nsAutoCString lang;
|
|
mFontGroup->Language()->ToUTF8String(lang);
|
|
fprintf(out, "gfxTextRun@%p (length %u) [%s] [%s] [%s]\n", this, mLength,
|
|
flagsString.get(), flags2String.get(), lang.get());
|
|
|
|
fprintf(out, " Glyph runs:\n");
|
|
for (const auto& run : mGlyphRuns) {
|
|
gfxFont* font = run.mFont;
|
|
const gfxFontStyle* style = font->GetStyle();
|
|
nsAutoCString styleString;
|
|
style->style.ToString(styleString);
|
|
fprintf(out, " offset=%d %s %f/%g/%s\n", run.mCharacterOffset,
|
|
font->GetName().get(), style->size, style->weight.ToFloat(),
|
|
styleString.get());
|
|
}
|
|
|
|
fprintf(out, " Glyphs:\n");
|
|
for (uint32_t i = 0; i < mLength; ++i) {
|
|
auto glyphData = GetCharacterGlyphs()[i];
|
|
|
|
nsCString line;
|
|
line.AppendPrintf(" [%d] 0x%p %s", i, GetCharacterGlyphs() + i,
|
|
glyphData.IsSimpleGlyph() ? "simple" : "detailed");
|
|
|
|
if (glyphData.IsSimpleGlyph()) {
|
|
line.AppendPrintf(" id=%d adv=%d", glyphData.GetSimpleGlyph(),
|
|
glyphData.GetSimpleAdvance());
|
|
} else {
|
|
uint32_t count = glyphData.GetGlyphCount();
|
|
if (count) {
|
|
line += " ids=";
|
|
for (uint32_t j = 0; j < count; j++) {
|
|
line.AppendPrintf(j ? ",%d" : "%d", GetDetailedGlyphs(i)[j].mGlyphID);
|
|
}
|
|
line += " advs=";
|
|
for (uint32_t j = 0; j < count; j++) {
|
|
line.AppendPrintf(j ? ",%d" : "%d", GetDetailedGlyphs(i)[j].mAdvance);
|
|
}
|
|
line += " offsets=";
|
|
for (uint32_t j = 0; j < count; j++) {
|
|
auto offset = GetDetailedGlyphs(i)[j].mOffset;
|
|
line.AppendPrintf(j ? ",(%g,%g)" : "(%g,%g)", offset.x.value,
|
|
offset.y.value);
|
|
}
|
|
} else {
|
|
line += " (no glyphs)";
|
|
}
|
|
}
|
|
|
|
if (glyphData.CharIsSpace()) {
|
|
line += " CHAR_IS_SPACE";
|
|
}
|
|
if (glyphData.CharIsTab()) {
|
|
line += " CHAR_IS_TAB";
|
|
}
|
|
if (glyphData.CharIsNewline()) {
|
|
line += " CHAR_IS_NEWLINE";
|
|
}
|
|
if (glyphData.CharIsFormattingControl()) {
|
|
line += " CHAR_IS_FORMATTING_CONTROL";
|
|
}
|
|
if (glyphData.CharTypeFlags() &
|
|
CompressedGlyph::FLAG_CHAR_NO_EMPHASIS_MARK) {
|
|
line += " CHAR_NO_EMPHASIS_MARK";
|
|
}
|
|
|
|
if (!glyphData.IsSimpleGlyph()) {
|
|
if (!glyphData.IsMissing()) {
|
|
line += " NOT_MISSING";
|
|
}
|
|
if (!glyphData.IsClusterStart()) {
|
|
line += " NOT_IS_CLUSTER_START";
|
|
}
|
|
if (!glyphData.IsLigatureGroupStart()) {
|
|
line += " NOT_LIGATURE_GROUP_START";
|
|
}
|
|
}
|
|
|
|
switch (glyphData.CanBreakBefore()) {
|
|
case CompressedGlyph::FLAG_BREAK_TYPE_NORMAL:
|
|
line += " BREAK_TYPE_NORMAL";
|
|
break;
|
|
case CompressedGlyph::FLAG_BREAK_TYPE_HYPHEN:
|
|
line += " BREAK_TYPE_HYPHEN";
|
|
break;
|
|
}
|
|
|
|
fprintf(out, "%s\n", line.get());
|
|
}
|
|
}
|
|
#endif
|
|
|
|
gfxFontGroup::gfxFontGroup(nsPresContext* aPresContext,
|
|
const StyleFontFamilyList& aFontFamilyList,
|
|
const gfxFontStyle* aStyle, nsAtom* aLanguage,
|
|
bool aExplicitLanguage,
|
|
gfxTextPerfMetrics* aTextPerf,
|
|
gfxUserFontSet* aUserFontSet, gfxFloat aDevToCssSize,
|
|
StyleFontVariantEmoji aVariantEmoji)
|
|
: mPresContext(aPresContext), // Note that aPresContext may be null!
|
|
mFamilyList(aFontFamilyList),
|
|
mStyle(*aStyle),
|
|
mLanguage(aLanguage),
|
|
mUnderlineOffset(UNDERLINE_OFFSET_NOT_SET),
|
|
mHyphenWidth(-1),
|
|
mDevToCssSize(aDevToCssSize),
|
|
mUserFontSet(aUserFontSet),
|
|
mTextPerf(aTextPerf),
|
|
mLastPrefLang(eFontPrefLang_Western),
|
|
mPageLang(gfxPlatformFontList::GetFontPrefLangFor(aLanguage)),
|
|
mLastPrefFirstFont(false),
|
|
mSkipDrawing(false),
|
|
mExplicitLanguage(aExplicitLanguage) {
|
|
switch (aVariantEmoji) {
|
|
case StyleFontVariantEmoji::Normal:
|
|
case StyleFontVariantEmoji::Unicode:
|
|
break;
|
|
case StyleFontVariantEmoji::Text:
|
|
mEmojiPresentation = eFontPresentation::Text;
|
|
break;
|
|
case StyleFontVariantEmoji::Emoji:
|
|
mEmojiPresentation = eFontPresentation::EmojiExplicit;
|
|
break;
|
|
}
|
|
// We don't use SetUserFontSet() here, as we want to unconditionally call
|
|
// EnsureFontList() rather than only do UpdateUserFonts() if it changed.
|
|
mCurrGeneration = 0;
|
|
}
|
|
|
|
gfxFontGroup::~gfxFontGroup() {
|
|
// Should not be dropped by stylo
|
|
MOZ_ASSERT(!Servo_IsWorkerThread());
|
|
}
|
|
|
|
static StyleGenericFontFamily GetDefaultGeneric(nsAtom* aLanguage) {
|
|
return StaticPresData::Get()
|
|
->GetFontPrefsForLang(aLanguage)
|
|
->GetDefaultGeneric();
|
|
}
|
|
|
|
class DeferredClearResolvedFonts final : public nsIRunnable {
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
|
|
DeferredClearResolvedFonts() = delete;
|
|
explicit DeferredClearResolvedFonts(
|
|
const DeferredClearResolvedFonts& aOther) = delete;
|
|
explicit DeferredClearResolvedFonts(
|
|
nsTArray<gfxFontGroup::FamilyFace>&& aFontList)
|
|
: mFontList(std::move(aFontList)) {}
|
|
|
|
protected:
|
|
virtual ~DeferredClearResolvedFonts() {}
|
|
|
|
NS_IMETHOD Run(void) override {
|
|
mFontList.Clear();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsTArray<gfxFontGroup::FamilyFace> mFontList;
|
|
};
|
|
|
|
NS_IMPL_ISUPPORTS(DeferredClearResolvedFonts, nsIRunnable)
|
|
|
|
void gfxFontGroup::EnsureFontList() {
|
|
// Ensure resolved font instances are valid; discard them if necessary.
|
|
auto* pfl = gfxPlatformFontList::PlatformFontList();
|
|
if (mFontListGeneration != pfl->GetGeneration()) {
|
|
// Forget cached fonts that may no longer be valid.
|
|
mLastPrefFamily = FontFamily();
|
|
mLastPrefFont = nullptr;
|
|
mDefaultFont = nullptr;
|
|
mResolvedFonts = false;
|
|
}
|
|
|
|
// If we have already resolved the font list, just return.
|
|
if (mResolvedFonts) {
|
|
return;
|
|
}
|
|
|
|
// Discard existing fonts; but if we're in servo traversal, defer the actual
|
|
// deletion.
|
|
// XXX(jfkthame) is this really necessary, or is the assertion in
|
|
// ~gfxUserFontFamily() obsolete?
|
|
if (gfxFontUtils::IsInServoTraversal()) {
|
|
NS_DispatchToMainThread(new DeferredClearResolvedFonts(std::move(mFonts)));
|
|
} else {
|
|
mFonts.Clear();
|
|
}
|
|
|
|
// (Re-)build the list of fonts.
|
|
AutoTArray<FamilyAndGeneric, 10> fonts;
|
|
|
|
// lookup fonts in the fontlist
|
|
for (const StyleSingleFontFamily& name : mFamilyList.list.AsSpan()) {
|
|
if (name.IsFamilyName()) {
|
|
const auto& familyName = name.AsFamilyName();
|
|
AddPlatformFont(nsAtomCString(familyName.name.AsAtom()),
|
|
familyName.syntax == StyleFontFamilyNameSyntax::Quoted,
|
|
fonts);
|
|
} else {
|
|
MOZ_ASSERT(name.IsGeneric());
|
|
const StyleGenericFontFamily generic = name.AsGeneric();
|
|
// system-ui is usually a single family, so it doesn't work great as
|
|
// fallback. Prefer the following generic or the language default instead.
|
|
if (mFallbackGeneric == StyleGenericFontFamily::None &&
|
|
generic != StyleGenericFontFamily::SystemUi) {
|
|
mFallbackGeneric = generic;
|
|
}
|
|
pfl->AddGenericFonts(mPresContext, generic, mLanguage, fonts);
|
|
if (mTextPerf) {
|
|
mTextPerf->current.genericLookups++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If necessary, append default language generic onto the end.
|
|
if (mFallbackGeneric == StyleGenericFontFamily::None && !mStyle.systemFont) {
|
|
auto defaultLanguageGeneric = GetDefaultGeneric(mLanguage);
|
|
|
|
pfl->AddGenericFonts(mPresContext, defaultLanguageGeneric, mLanguage,
|
|
fonts);
|
|
if (mTextPerf) {
|
|
mTextPerf->current.genericLookups++;
|
|
}
|
|
}
|
|
|
|
// build the fontlist from the specified families
|
|
for (const auto& f : fonts) {
|
|
if (f.mFamily.mShared) {
|
|
AddFamilyToFontList(f.mFamily.mShared, f.mGeneric);
|
|
} else {
|
|
AddFamilyToFontList(f.mFamily.mUnshared, f.mGeneric);
|
|
}
|
|
}
|
|
|
|
mFontListGeneration = pfl->GetGeneration();
|
|
mResolvedFonts = true;
|
|
}
|
|
|
|
void gfxFontGroup::AddPlatformFont(const nsACString& aName, bool aQuotedName,
|
|
nsTArray<FamilyAndGeneric>& aFamilyList) {
|
|
// First, look up in the user font set...
|
|
// If the fontSet matches the family, we must not look for a platform
|
|
// font of the same name, even if we fail to actually get a fontEntry
|
|
// here; we'll fall back to the next name in the CSS font-family list.
|
|
if (mUserFontSet) {
|
|
// Add userfonts to the fontlist whether already loaded
|
|
// or not. Loading is initiated during font matching.
|
|
RefPtr<gfxFontFamily> family = mUserFontSet->LookupFamily(aName);
|
|
if (family) {
|
|
aFamilyList.AppendElement(std::move(family));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Not known in the user font set ==> check system fonts
|
|
gfxPlatformFontList::PlatformFontList()->FindAndAddFamilies(
|
|
mPresContext, StyleGenericFontFamily::None, aName, &aFamilyList,
|
|
aQuotedName ? gfxPlatformFontList::FindFamiliesFlags::eQuotedFamilyName
|
|
: gfxPlatformFontList::FindFamiliesFlags(0),
|
|
&mStyle, mLanguage.get(), mDevToCssSize);
|
|
}
|
|
|
|
void gfxFontGroup::AddFamilyToFontList(gfxFontFamily* aFamily,
|
|
StyleGenericFontFamily aGeneric) {
|
|
if (!aFamily) {
|
|
MOZ_ASSERT_UNREACHABLE("don't try to add a null font family!");
|
|
return;
|
|
}
|
|
AutoTArray<gfxFontEntry*, 4> fontEntryList;
|
|
aFamily->FindAllFontsForStyle(mStyle, fontEntryList);
|
|
// add these to the fontlist
|
|
for (gfxFontEntry* fe : fontEntryList) {
|
|
if (!HasFont(fe)) {
|
|
FamilyFace ff(aFamily, fe, aGeneric);
|
|
if (fe->mIsUserFontContainer) {
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
mFonts.AppendElement(ff);
|
|
}
|
|
}
|
|
// for a family marked as "check fallback faces", only mark the last
|
|
// entry so that fallbacks for a family are only checked once
|
|
if (aFamily->CheckForFallbackFaces() && !fontEntryList.IsEmpty() &&
|
|
!mFonts.IsEmpty()) {
|
|
mFonts.LastElement().SetCheckForFallbackFaces();
|
|
}
|
|
}
|
|
|
|
void gfxFontGroup::AddFamilyToFontList(fontlist::Family* aFamily,
|
|
StyleGenericFontFamily aGeneric) {
|
|
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
|
|
if (!aFamily->IsInitialized()) {
|
|
if (ServoStyleSet* set = gfxFontUtils::CurrentServoStyleSet()) {
|
|
// If we need to initialize a Family record, but we're on a style
|
|
// worker thread, we have to defer it.
|
|
set->AppendTask(PostTraversalTask::InitializeFamily(aFamily));
|
|
set->AppendTask(PostTraversalTask::FontInfoUpdate(set));
|
|
return;
|
|
}
|
|
if (!pfl->InitializeFamily(aFamily)) {
|
|
return;
|
|
}
|
|
}
|
|
AutoTArray<fontlist::Face*, 4> faceList;
|
|
aFamily->FindAllFacesForStyle(pfl->SharedFontList(), mStyle, faceList);
|
|
for (auto* face : faceList) {
|
|
gfxFontEntry* fe = pfl->GetOrCreateFontEntry(face, aFamily);
|
|
if (fe && !HasFont(fe)) {
|
|
FamilyFace ff(aFamily, fe, aGeneric);
|
|
mFonts.AppendElement(ff);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool gfxFontGroup::HasFont(const gfxFontEntry* aFontEntry) {
|
|
for (auto& f : mFonts) {
|
|
if (f.FontEntry() == aFontEntry) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::GetFontAt(uint32_t i, uint32_t aCh,
|
|
bool* aLoading) {
|
|
if (i >= mFonts.Length()) {
|
|
return nullptr;
|
|
}
|
|
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid() || ff.IsLoading()) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<gfxFont> font = ff.Font();
|
|
if (!font) {
|
|
gfxFontEntry* fe = ff.FontEntry();
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
gfxCharacterMap* unicodeRangeMap = nullptr;
|
|
if (fe->mIsUserFontContainer) {
|
|
gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
|
|
if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
|
|
ufe->CharacterInUnicodeRange(aCh) && !*aLoading) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
*aLoading = ff.IsLoading();
|
|
}
|
|
fe = ufe->GetPlatformFontEntry();
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
unicodeRangeMap = ufe->GetUnicodeRangeMap();
|
|
}
|
|
font = fe->FindOrMakeFont(&mStyle, unicodeRangeMap);
|
|
if (!font || !font->Valid()) {
|
|
ff.SetInvalid();
|
|
return nullptr;
|
|
}
|
|
ff.SetFont(font);
|
|
}
|
|
return font.forget();
|
|
}
|
|
|
|
void gfxFontGroup::FamilyFace::CheckState(bool& aSkipDrawing) {
|
|
gfxFontEntry* fe = FontEntry();
|
|
if (!fe) {
|
|
return;
|
|
}
|
|
if (fe->mIsUserFontContainer) {
|
|
gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
|
|
gfxUserFontEntry::UserFontLoadState state = ufe->LoadState();
|
|
switch (state) {
|
|
case gfxUserFontEntry::STATUS_LOAD_PENDING:
|
|
case gfxUserFontEntry::STATUS_LOADING:
|
|
SetLoading(true);
|
|
break;
|
|
case gfxUserFontEntry::STATUS_FAILED:
|
|
SetInvalid();
|
|
// fall-thru to the default case
|
|
[[fallthrough]];
|
|
default:
|
|
SetLoading(false);
|
|
}
|
|
if (ufe->WaitForUserFont()) {
|
|
aSkipDrawing = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool gfxFontGroup::FamilyFace::EqualsUserFont(
|
|
const gfxUserFontEntry* aUserFont) const {
|
|
gfxFontEntry* fe = FontEntry();
|
|
// if there's a font, the entry is the underlying platform font
|
|
if (mFontCreated) {
|
|
gfxFontEntry* pfe = aUserFont->GetPlatformFontEntry();
|
|
if (pfe == fe) {
|
|
return true;
|
|
}
|
|
} else if (fe == aUserFont) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static nsAutoCString FamilyListToString(
|
|
const StyleFontFamilyList& aFamilyList) {
|
|
return StringJoin(","_ns, aFamilyList.list.AsSpan(),
|
|
[](nsACString& dst, const StyleSingleFontFamily& name) {
|
|
name.AppendToString(dst);
|
|
});
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::GetDefaultFont() {
|
|
if (mDefaultFont) {
|
|
return do_AddRef(mDefaultFont);
|
|
}
|
|
|
|
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
|
|
FontFamily family = pfl->GetDefaultFont(mPresContext, &mStyle);
|
|
MOZ_ASSERT(!family.IsNull(),
|
|
"invalid default font returned by GetDefaultFont");
|
|
|
|
gfxFontEntry* fe = nullptr;
|
|
if (family.mShared) {
|
|
fontlist::Family* fam = family.mShared;
|
|
if (!fam->IsInitialized()) {
|
|
// If this fails, FindFaceForStyle will just safely return nullptr
|
|
Unused << pfl->InitializeFamily(fam);
|
|
}
|
|
fontlist::Face* face = fam->FindFaceForStyle(pfl->SharedFontList(), mStyle);
|
|
if (face) {
|
|
fe = pfl->GetOrCreateFontEntry(face, fam);
|
|
}
|
|
} else {
|
|
fe = family.mUnshared->FindFontForStyle(mStyle);
|
|
}
|
|
if (fe) {
|
|
mDefaultFont = fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
|
|
uint32_t numInits, loaderState;
|
|
pfl->GetFontlistInitInfo(numInits, loaderState);
|
|
|
|
MOZ_ASSERT(numInits != 0,
|
|
"must initialize system fontlist before getting default font!");
|
|
|
|
uint32_t numFonts = 0;
|
|
if (!mDefaultFont) {
|
|
// Try for a "font of last resort...."
|
|
// Because an empty font list would be Really Bad for later code
|
|
// that assumes it will be able to get valid metrics for layout,
|
|
// just look for the first usable font and put in the list.
|
|
// (see bug 554544)
|
|
if (pfl->SharedFontList()) {
|
|
fontlist::FontList* list = pfl->SharedFontList();
|
|
numFonts = list->NumFamilies();
|
|
fontlist::Family* families = list->Families();
|
|
for (uint32_t i = 0; i < numFonts; ++i) {
|
|
fontlist::Family* fam = &families[i];
|
|
if (!fam->IsInitialized()) {
|
|
Unused << pfl->InitializeFamily(fam);
|
|
}
|
|
fontlist::Face* face =
|
|
fam->FindFaceForStyle(pfl->SharedFontList(), mStyle);
|
|
if (face) {
|
|
fe = pfl->GetOrCreateFontEntry(face, fam);
|
|
if (fe) {
|
|
mDefaultFont = fe->FindOrMakeFont(&mStyle);
|
|
if (mDefaultFont) {
|
|
break;
|
|
}
|
|
NS_WARNING("FindOrMakeFont failed");
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
AutoTArray<RefPtr<gfxFontFamily>, 200> familyList;
|
|
pfl->GetFontFamilyList(familyList);
|
|
numFonts = familyList.Length();
|
|
for (uint32_t i = 0; i < numFonts; ++i) {
|
|
gfxFontEntry* fe = familyList[i]->FindFontForStyle(mStyle, true);
|
|
if (fe) {
|
|
mDefaultFont = fe->FindOrMakeFont(&mStyle);
|
|
if (mDefaultFont) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!mDefaultFont) {
|
|
// We must have failed to find anything usable in our font-family list,
|
|
// or it's badly broken. One more last-ditch effort to make a font:
|
|
if (gfxFontEntry* fe = pfl->GetDefaultFontEntry()) {
|
|
if (RefPtr<gfxFont> f = fe->FindOrMakeFont(&mStyle)) {
|
|
return f.forget();
|
|
}
|
|
}
|
|
|
|
// an empty font list at this point is fatal; we're not going to
|
|
// be able to do even the most basic layout operations
|
|
|
|
// annotate crash report with fontlist info
|
|
nsAutoCString fontInitInfo;
|
|
fontInitInfo.AppendPrintf("no fonts - init: %d fonts: %d loader: %d",
|
|
numInits, numFonts, loaderState);
|
|
#ifdef XP_WIN
|
|
bool dwriteEnabled = gfxWindowsPlatform::GetPlatform()->DWriteEnabled();
|
|
double upTime = (double)GetTickCount();
|
|
fontInitInfo.AppendPrintf(" backend: %s system-uptime: %9.3f sec",
|
|
dwriteEnabled ? "directwrite" : "gdi",
|
|
upTime / 1000);
|
|
#endif
|
|
gfxCriticalError() << fontInitInfo.get();
|
|
|
|
char msg[256]; // CHECK buffer length if revising message below
|
|
SprintfLiteral(msg, "unable to find a usable font (%.220s)",
|
|
FamilyListToString(mFamilyList).get());
|
|
MOZ_CRASH_UNSAFE(msg);
|
|
}
|
|
|
|
return do_AddRef(mDefaultFont);
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::GetFirstValidFont(
|
|
uint32_t aCh, StyleGenericFontFamily* aGeneric, bool* aIsFirst) {
|
|
EnsureFontList();
|
|
|
|
uint32_t count = mFonts.Length();
|
|
bool loading = false;
|
|
|
|
// Check whether the font supports the given character, unless aCh is the
|
|
// kCSSFirstAvailableFont constant, in which case (as per CSS Fonts spec)
|
|
// we want the first font whose unicode-range does not exclude <space>,
|
|
// regardless of whether it in fact supports the <space> character.
|
|
auto isValidForChar = [](gfxFont* aFont, uint32_t aCh) -> bool {
|
|
if (!aFont) {
|
|
return false;
|
|
}
|
|
if (aCh == kCSSFirstAvailableFont) {
|
|
if (const auto* unicodeRange = aFont->GetUnicodeRangeMap()) {
|
|
return unicodeRange->test(' ');
|
|
}
|
|
return true;
|
|
}
|
|
return aFont->HasCharacter(aCh);
|
|
};
|
|
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid()) {
|
|
continue;
|
|
}
|
|
|
|
// already have a font?
|
|
RefPtr<gfxFont> font = ff.Font();
|
|
if (isValidForChar(font, aCh)) {
|
|
if (aGeneric) {
|
|
*aGeneric = ff.Generic();
|
|
}
|
|
if (aIsFirst) {
|
|
*aIsFirst = (i == 0);
|
|
}
|
|
return font.forget();
|
|
}
|
|
|
|
// Need to build a font, loading userfont if not loaded. In
|
|
// cases where unicode range might apply, use the character
|
|
// provided.
|
|
gfxFontEntry* fe = ff.FontEntry();
|
|
if (fe && fe->mIsUserFontContainer) {
|
|
gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
|
|
bool inRange = ufe->CharacterInUnicodeRange(
|
|
aCh == kCSSFirstAvailableFont ? ' ' : aCh);
|
|
if (inRange) {
|
|
if (!loading &&
|
|
ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
if (ff.IsLoading()) {
|
|
loading = true;
|
|
}
|
|
}
|
|
if (ufe->LoadState() != gfxUserFontEntry::STATUS_LOADED || !inRange) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
font = GetFontAt(i, aCh, &loading);
|
|
if (isValidForChar(font, aCh)) {
|
|
if (aGeneric) {
|
|
*aGeneric = ff.Generic();
|
|
}
|
|
if (aIsFirst) {
|
|
*aIsFirst = (i == 0);
|
|
}
|
|
return font.forget();
|
|
}
|
|
}
|
|
if (aGeneric) {
|
|
*aGeneric = StyleGenericFontFamily::None;
|
|
}
|
|
if (aIsFirst) {
|
|
*aIsFirst = false;
|
|
}
|
|
return GetDefaultFont();
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::GetFirstMathFont() {
|
|
EnsureFontList();
|
|
uint32_t count = mFonts.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
RefPtr<gfxFont> font = GetFontAt(i);
|
|
if (font && font->TryGetMathTable()) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool gfxFontGroup::IsInvalidChar(uint8_t ch) {
|
|
return ((ch & 0x7f) < 0x20 || ch == 0x7f);
|
|
}
|
|
|
|
bool gfxFontGroup::IsInvalidChar(char16_t ch) {
|
|
// All printable 7-bit ASCII values are OK
|
|
if (ch >= ' ' && ch < 0x7f) {
|
|
return false;
|
|
}
|
|
// No point in sending non-printing control chars through font shaping
|
|
if (ch <= 0x9f) {
|
|
return true;
|
|
}
|
|
// Word-separating format/bidi control characters are not shaped as part
|
|
// of words.
|
|
return (((ch & 0xFF00) == 0x2000 /* Unicode control character */ &&
|
|
(ch == 0x200B /*ZWSP*/ || ch == 0x2028 /*LSEP*/ ||
|
|
ch == 0x2029 /*PSEP*/ || ch == 0x2060 /*WJ*/)) ||
|
|
ch == 0xfeff /*ZWNBSP*/ || IsBidiControl(ch));
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun> gfxFontGroup::MakeEmptyTextRun(
|
|
const Parameters* aParams, gfx::ShapedTextFlags aFlags,
|
|
nsTextFrameUtils::Flags aFlags2) {
|
|
aFlags |= ShapedTextFlags::TEXT_IS_8BIT;
|
|
return gfxTextRun::Create(aParams, 0, this, aFlags, aFlags2);
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun> gfxFontGroup::MakeSpaceTextRun(
|
|
const Parameters* aParams, gfx::ShapedTextFlags aFlags,
|
|
nsTextFrameUtils::Flags aFlags2) {
|
|
aFlags |= ShapedTextFlags::TEXT_IS_8BIT;
|
|
|
|
RefPtr<gfxTextRun> textRun =
|
|
gfxTextRun::Create(aParams, 1, this, aFlags, aFlags2);
|
|
if (!textRun) {
|
|
return nullptr;
|
|
}
|
|
|
|
gfx::ShapedTextFlags orientation = aFlags & ShapedTextFlags::TEXT_ORIENT_MASK;
|
|
if (orientation == ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED) {
|
|
orientation = ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
|
}
|
|
|
|
RefPtr<gfxFont> font = GetFirstValidFont();
|
|
if (MOZ_UNLIKELY(GetStyle()->AdjustedSizeMustBeZero())) {
|
|
// Short-circuit for size-0 fonts, as Windows and ATSUI can't handle
|
|
// them, and always create at least size 1 fonts, i.e. they still
|
|
// render something for size 0 fonts.
|
|
textRun->AddGlyphRun(font, FontMatchType::Kind::kUnspecified, 0, false,
|
|
orientation, false);
|
|
} else {
|
|
if (font->GetSpaceGlyph()) {
|
|
// Normally, the font has a cached space glyph, so we can avoid
|
|
// the cost of calling FindFontForChar.
|
|
textRun->SetSpaceGlyph(font, aParams->mDrawTarget, 0, orientation);
|
|
} else {
|
|
// In case the primary font doesn't have <space> (bug 970891),
|
|
// find one that does.
|
|
FontMatchType matchType;
|
|
RefPtr<gfxFont> spaceFont =
|
|
FindFontForChar(' ', 0, 0, Script::LATIN, nullptr, &matchType);
|
|
if (spaceFont) {
|
|
textRun->SetSpaceGlyph(spaceFont, aParams->mDrawTarget, 0, orientation);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note that the gfxGlyphExtents glyph bounds storage for the font will
|
|
// always contain an entry for the font's space glyph, so we don't have
|
|
// to call FetchGlyphExtents here.
|
|
return textRun.forget();
|
|
}
|
|
|
|
template <typename T>
|
|
already_AddRefed<gfxTextRun> gfxFontGroup::MakeBlankTextRun(
|
|
const T* aString, uint32_t aLength, const Parameters* aParams,
|
|
gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2) {
|
|
RefPtr<gfxTextRun> textRun =
|
|
gfxTextRun::Create(aParams, aLength, this, aFlags, aFlags2);
|
|
if (!textRun) {
|
|
return nullptr;
|
|
}
|
|
|
|
gfx::ShapedTextFlags orientation = aFlags & ShapedTextFlags::TEXT_ORIENT_MASK;
|
|
if (orientation == ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED) {
|
|
orientation = ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT;
|
|
}
|
|
RefPtr<gfxFont> font = GetFirstValidFont();
|
|
textRun->AddGlyphRun(font, FontMatchType::Kind::kUnspecified, 0, false,
|
|
orientation, false);
|
|
|
|
textRun->SetupClusterBoundaries(0, aString, aLength);
|
|
|
|
for (uint32_t i = 0; i < aLength; i++) {
|
|
if (aString[i] == '\n') {
|
|
textRun->SetIsNewline(i);
|
|
} else if (aString[i] == '\t') {
|
|
textRun->SetIsTab(i);
|
|
}
|
|
}
|
|
|
|
return textRun.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun> gfxFontGroup::MakeHyphenTextRun(
|
|
DrawTarget* aDrawTarget, gfx::ShapedTextFlags aFlags,
|
|
uint32_t aAppUnitsPerDevUnit) {
|
|
// only use U+2010 if it is supported by the first font in the group;
|
|
// it's better to use ASCII '-' from the primary font than to fall back to
|
|
// U+2010 from some other, possibly poorly-matching face
|
|
static const char16_t hyphen = 0x2010;
|
|
RefPtr<gfxFont> font = GetFirstValidFont(uint32_t(hyphen));
|
|
if (font->HasCharacter(hyphen)) {
|
|
return MakeTextRun(&hyphen, 1, aDrawTarget, aAppUnitsPerDevUnit, aFlags,
|
|
nsTextFrameUtils::Flags(), nullptr);
|
|
}
|
|
|
|
static const uint8_t dash = '-';
|
|
return MakeTextRun(&dash, 1, aDrawTarget, aAppUnitsPerDevUnit, aFlags,
|
|
nsTextFrameUtils::Flags(), nullptr);
|
|
}
|
|
|
|
gfxFloat gfxFontGroup::GetHyphenWidth(
|
|
const gfxTextRun::PropertyProvider* aProvider) {
|
|
if (mHyphenWidth < 0) {
|
|
RefPtr<DrawTarget> dt(aProvider->GetDrawTarget());
|
|
if (dt) {
|
|
RefPtr<gfxTextRun> hyphRun(
|
|
MakeHyphenTextRun(dt, aProvider->GetShapedTextFlags(),
|
|
aProvider->GetAppUnitsPerDevUnit()));
|
|
mHyphenWidth = hyphRun.get() ? hyphRun->GetAdvanceWidth() : 0;
|
|
}
|
|
}
|
|
return mHyphenWidth;
|
|
}
|
|
|
|
template <typename T>
|
|
already_AddRefed<gfxTextRun> gfxFontGroup::MakeTextRun(
|
|
const T* aString, uint32_t aLength, const Parameters* aParams,
|
|
gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2,
|
|
gfxMissingFontRecorder* aMFR) {
|
|
if (aLength == 0) {
|
|
return MakeEmptyTextRun(aParams, aFlags, aFlags2);
|
|
}
|
|
if (aLength == 1 && aString[0] == ' ') {
|
|
return MakeSpaceTextRun(aParams, aFlags, aFlags2);
|
|
}
|
|
|
|
if (sizeof(T) == 1) {
|
|
aFlags |= ShapedTextFlags::TEXT_IS_8BIT;
|
|
}
|
|
|
|
if (MOZ_UNLIKELY(GetStyle()->AdjustedSizeMustBeZero())) {
|
|
// Short-circuit for size-0 fonts, as Windows and ATSUI can't handle
|
|
// them, and always create at least size 1 fonts, i.e. they still
|
|
// render something for size 0 fonts.
|
|
return MakeBlankTextRun(aString, aLength, aParams, aFlags, aFlags2);
|
|
}
|
|
|
|
RefPtr<gfxTextRun> textRun =
|
|
gfxTextRun::Create(aParams, aLength, this, aFlags, aFlags2);
|
|
if (!textRun) {
|
|
return nullptr;
|
|
}
|
|
|
|
InitTextRun(aParams->mDrawTarget, textRun.get(), aString, aLength, aMFR);
|
|
|
|
textRun->FetchGlyphExtents(aParams->mDrawTarget);
|
|
|
|
return textRun.forget();
|
|
}
|
|
|
|
// MakeTextRun instantiations (needed by Linux64 base-toolchain build).
|
|
template already_AddRefed<gfxTextRun> gfxFontGroup::MakeTextRun(
|
|
const uint8_t* aString, uint32_t aLength, const Parameters* aParams,
|
|
gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2,
|
|
gfxMissingFontRecorder* aMFR);
|
|
template already_AddRefed<gfxTextRun> gfxFontGroup::MakeTextRun(
|
|
const char16_t* aString, uint32_t aLength, const Parameters* aParams,
|
|
gfx::ShapedTextFlags aFlags, nsTextFrameUtils::Flags aFlags2,
|
|
gfxMissingFontRecorder* aMFR);
|
|
|
|
// Helper to get a hashtable that maps tags to Script codes, created on first
|
|
// use.
|
|
static const nsTHashMap<nsUint32HashKey, Script>* ScriptTagToCodeTable() {
|
|
using TableT = nsTHashMap<nsUint32HashKey, Script>;
|
|
|
|
// Initialize our static var by creating the hashtable and populating it with
|
|
// all the valid codes.
|
|
// According to
|
|
// https://en.cppreference.com/w/cpp/language/storage_duration#Static_block_variables:
|
|
// "If multiple threads attempt to initialize the same static local variable
|
|
// concurrently, the initialization occurs exactly once."
|
|
static UniquePtr<TableT> sScriptTagToCode = []() {
|
|
auto tagToCode = MakeUnique<TableT>(size_t(Script::NUM_SCRIPT_CODES));
|
|
Script scriptCount =
|
|
Script(std::min<int>(UnicodeProperties::GetMaxNumberOfScripts() + 1,
|
|
int(Script::NUM_SCRIPT_CODES)));
|
|
for (Script s = Script::ARABIC; s < scriptCount;
|
|
s = Script(static_cast<int>(s) + 1)) {
|
|
uint32_t tag = GetScriptTagForCode(s);
|
|
if (tag != HB_SCRIPT_UNKNOWN) {
|
|
tagToCode->InsertOrUpdate(tag, s);
|
|
}
|
|
}
|
|
// Clearing the UniquePtr at shutdown will free the table. The call to
|
|
// ClearOnShutdown has to be done on the main thread, even if this
|
|
// initialization happens from a worker.
|
|
if (NS_IsMainThread()) {
|
|
ClearOnShutdown(&sScriptTagToCode);
|
|
} else {
|
|
NS_DispatchToMainThread(
|
|
NS_NewRunnableFunction("ClearOnShutdown(sScriptTagToCode)",
|
|
[]() { ClearOnShutdown(&sScriptTagToCode); }));
|
|
}
|
|
return tagToCode;
|
|
}();
|
|
|
|
return sScriptTagToCode.get();
|
|
}
|
|
|
|
template <typename T>
|
|
void gfxFontGroup::InitTextRun(DrawTarget* aDrawTarget, gfxTextRun* aTextRun,
|
|
const T* aString, uint32_t aLength,
|
|
gfxMissingFontRecorder* aMFR) {
|
|
NS_ASSERTION(aLength > 0, "don't call InitTextRun for a zero-length run");
|
|
|
|
// we need to do numeral processing even on 8-bit text,
|
|
// in case we're converting Western to Hindi/Arabic digits
|
|
uint32_t numOption = gfxPlatform::GetPlatform()->GetBidiNumeralOption();
|
|
UniquePtr<char16_t[]> transformedString;
|
|
if (numOption != IBMBIDI_NUMERAL_NOMINAL) {
|
|
// scan the string for numerals that may need to be transformed;
|
|
// if we find any, we'll make a local copy here and use that for
|
|
// font matching and glyph generation/shaping
|
|
bool prevIsArabic =
|
|
!!(aTextRun->GetFlags() & ShapedTextFlags::TEXT_INCOMING_ARABICCHAR);
|
|
for (uint32_t i = 0; i < aLength; ++i) {
|
|
char16_t origCh = aString[i];
|
|
char16_t newCh = HandleNumberInChar(origCh, prevIsArabic, numOption);
|
|
if (newCh != origCh) {
|
|
if (!transformedString) {
|
|
transformedString = MakeUnique<char16_t[]>(aLength);
|
|
if constexpr (sizeof(T) == sizeof(char16_t)) {
|
|
memcpy(transformedString.get(), aString, i * sizeof(char16_t));
|
|
} else {
|
|
for (uint32_t j = 0; j < i; ++j) {
|
|
transformedString[j] = aString[j];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (transformedString) {
|
|
transformedString[i] = newCh;
|
|
}
|
|
prevIsArabic = IS_ARABIC_CHAR(newCh);
|
|
}
|
|
}
|
|
|
|
LogModule* log = mStyle.systemFont ? gfxPlatform::GetLog(eGfxLog_textrunui)
|
|
: gfxPlatform::GetLog(eGfxLog_textrun);
|
|
|
|
// variant fallback handling may end up passing through this twice
|
|
bool redo;
|
|
do {
|
|
redo = false;
|
|
|
|
// split into script runs so that script can potentially influence
|
|
// the font matching process below
|
|
gfxScriptItemizer scriptRuns;
|
|
const char16_t* textPtr = nullptr;
|
|
|
|
if (sizeof(T) == sizeof(uint8_t) && !transformedString) {
|
|
scriptRuns.SetText(aString, aLength);
|
|
} else {
|
|
if (transformedString) {
|
|
textPtr = transformedString.get();
|
|
} else {
|
|
// typecast to avoid compilation error for the 8-bit version,
|
|
// even though this is dead code in that case
|
|
textPtr = reinterpret_cast<const char16_t*>(aString);
|
|
}
|
|
|
|
scriptRuns.SetText(textPtr, aLength);
|
|
}
|
|
|
|
while (gfxScriptItemizer::Run run = scriptRuns.Next()) {
|
|
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
|
|
nsAutoCString lang;
|
|
mLanguage->ToUTF8String(lang);
|
|
nsAutoCString styleString;
|
|
mStyle.style.ToString(styleString);
|
|
auto defaultLanguageGeneric = GetDefaultGeneric(mLanguage);
|
|
MOZ_LOG(
|
|
log, LogLevel::Warning,
|
|
("(%s) fontgroup: [%s] default: %s lang: %s script: %d "
|
|
"len %d weight: %g stretch: %g%% style: %s size: %6.2f "
|
|
"%zu-byte TEXTRUN [%s] ENDTEXTRUN\n",
|
|
(mStyle.systemFont ? "textrunui" : "textrun"),
|
|
FamilyListToString(mFamilyList).get(),
|
|
(defaultLanguageGeneric == StyleGenericFontFamily::Serif
|
|
? "serif"
|
|
: (defaultLanguageGeneric == StyleGenericFontFamily::SansSerif
|
|
? "sans-serif"
|
|
: "none")),
|
|
lang.get(), static_cast<int>(run.mScript), run.mLength,
|
|
mStyle.weight.ToFloat(), mStyle.stretch.ToFloat(),
|
|
styleString.get(), mStyle.size, sizeof(T),
|
|
textPtr
|
|
? NS_ConvertUTF16toUTF8(textPtr + run.mOffset, run.mLength)
|
|
.get()
|
|
: nsPromiseFlatCString(
|
|
nsDependentCSubstring(
|
|
reinterpret_cast<const char*>(aString) + run.mOffset,
|
|
run.mLength))
|
|
.get()));
|
|
}
|
|
|
|
// If COMMON or INHERITED was not resolved, try to use the language code
|
|
// to guess a likely script.
|
|
if (run.mScript <= Script::INHERITED) {
|
|
// This assumes Script codes begin with COMMON and INHERITED, preceding
|
|
// codes for any "real" scripts.
|
|
MOZ_ASSERT(
|
|
run.mScript == Script::COMMON || run.mScript == Script::INHERITED,
|
|
"unexpected Script code!");
|
|
nsAutoCString lang;
|
|
mLanguage->ToUTF8String(lang);
|
|
Locale locale;
|
|
if (LocaleParser::TryParse(lang, locale).isOk()) {
|
|
if (locale.Script().Missing()) {
|
|
Unused << locale.AddLikelySubtags();
|
|
}
|
|
if (locale.Script().Present()) {
|
|
Span span = locale.Script().Span();
|
|
MOZ_ASSERT(span.Length() == 4);
|
|
uint32_t tag = TRUETYPE_TAG(span[0], span[1], span[2], span[3]);
|
|
Script script;
|
|
if (ScriptTagToCodeTable()->Get(tag, &script)) {
|
|
run.mScript = script;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (textPtr) {
|
|
InitScriptRun(aDrawTarget, aTextRun, textPtr + run.mOffset, run.mOffset,
|
|
run.mLength, run.mScript, aMFR);
|
|
} else {
|
|
InitScriptRun(aDrawTarget, aTextRun, aString + run.mOffset, run.mOffset,
|
|
run.mLength, run.mScript, aMFR);
|
|
}
|
|
}
|
|
|
|
// if shaping was aborted due to lack of feature support, clear out
|
|
// glyph runs and redo shaping with fallback forced on
|
|
if (aTextRun->GetShapingState() == gfxTextRun::eShapingState_Aborted) {
|
|
redo = true;
|
|
aTextRun->SetShapingState(gfxTextRun::eShapingState_ForceFallbackFeature);
|
|
aTextRun->ClearGlyphsAndCharacters();
|
|
}
|
|
|
|
} while (redo);
|
|
|
|
if (sizeof(T) == sizeof(char16_t) && aLength > 0) {
|
|
gfxTextRun::CompressedGlyph* glyph = aTextRun->GetCharacterGlyphs();
|
|
if (!glyph->IsSimpleGlyph()) {
|
|
glyph->SetClusterStart(true);
|
|
}
|
|
}
|
|
|
|
// It's possible for CoreText to omit glyph runs if it decides they contain
|
|
// only invisibles (e.g., U+FEFF, see reftest 474417-1). In this case, we
|
|
// need to eliminate them from the glyph run array to avoid drawing "partial
|
|
// ligatures" with the wrong font.
|
|
// We don't do this during InitScriptRun (or gfxFont::InitTextRun) because
|
|
// it will iterate back over all glyphruns in the textrun, which leads to
|
|
// pathologically-bad perf in the case where a textrun contains many script
|
|
// changes (see bug 680402) - we'd end up re-sanitizing all the earlier runs
|
|
// every time a new script subrun is processed.
|
|
aTextRun->SanitizeGlyphRuns();
|
|
}
|
|
|
|
static inline bool IsPUA(uint32_t aUSV) {
|
|
// We could look up the General Category of the codepoint here,
|
|
// but it's simpler to check PUA codepoint ranges.
|
|
return (aUSV >= 0xE000 && aUSV <= 0xF8FF) || (aUSV >= 0xF0000);
|
|
}
|
|
|
|
template <typename T>
|
|
void gfxFontGroup::InitScriptRun(DrawTarget* aDrawTarget, gfxTextRun* aTextRun,
|
|
const T* aString, // text for this script run,
|
|
// not the entire textrun
|
|
uint32_t aOffset, // position of the script
|
|
// run within the textrun
|
|
uint32_t aLength, // length of the script run
|
|
Script aRunScript,
|
|
gfxMissingFontRecorder* aMFR) {
|
|
NS_ASSERTION(aLength > 0, "don't call InitScriptRun for a 0-length run");
|
|
NS_ASSERTION(aTextRun->GetShapingState() != gfxTextRun::eShapingState_Aborted,
|
|
"don't call InitScriptRun with aborted shaping state");
|
|
|
|
// confirm the load state of userfonts in the list
|
|
if (mUserFontSet && mCurrGeneration != mUserFontSet->GetGeneration()) {
|
|
UpdateUserFonts();
|
|
}
|
|
|
|
RefPtr<gfxFont> mainFont = GetFirstValidFont();
|
|
|
|
ShapedTextFlags orientation =
|
|
aTextRun->GetFlags() & ShapedTextFlags::TEXT_ORIENT_MASK;
|
|
|
|
if (orientation != ShapedTextFlags::TEXT_ORIENT_HORIZONTAL &&
|
|
(aRunScript == Script::MONGOLIAN || aRunScript == Script::PHAGS_PA)) {
|
|
// Mongolian and Phags-pa text should ignore text-orientation and
|
|
// always render in its "native" vertical mode, implemented by fonts
|
|
// as sideways-right (i.e as if shaped horizontally, and then the
|
|
// entire line is rotated to render vertically). Therefore, we ignore
|
|
// the aOrientation value from the textrun's flags, and make all
|
|
// vertical Mongolian/Phags-pa use sideways-right.
|
|
orientation = ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
|
}
|
|
|
|
uint32_t runStart = 0;
|
|
AutoTArray<TextRange, 3> fontRanges;
|
|
ComputeRanges(fontRanges, aString, aLength, aRunScript, orientation);
|
|
uint32_t numRanges = fontRanges.Length();
|
|
bool missingChars = false;
|
|
bool isCJK = gfxTextRun::IsCJKScript(aRunScript);
|
|
|
|
for (uint32_t r = 0; r < numRanges; r++) {
|
|
const TextRange& range = fontRanges[r];
|
|
uint32_t matchedLength = range.Length();
|
|
RefPtr<gfxFont> matchedFont = range.font;
|
|
// create the glyph run for this range
|
|
if (matchedFont && mStyle.noFallbackVariantFeatures) {
|
|
// common case - just do glyph layout and record the
|
|
// resulting positioned glyphs
|
|
aTextRun->AddGlyphRun(matchedFont, range.matchType, aOffset + runStart,
|
|
(matchedLength > 0), range.orientation, isCJK);
|
|
if (!matchedFont->SplitAndInitTextRun(
|
|
aDrawTarget, aTextRun, aString + runStart, aOffset + runStart,
|
|
matchedLength, aRunScript, mLanguage, range.orientation)) {
|
|
// glyph layout failed! treat as missing glyphs
|
|
matchedFont = nullptr;
|
|
}
|
|
} else if (matchedFont) {
|
|
// shape with some variant feature that requires fallback handling
|
|
bool petiteToSmallCaps = false;
|
|
bool syntheticLower = false;
|
|
bool syntheticUpper = false;
|
|
|
|
if (mStyle.variantSubSuper != NS_FONT_VARIANT_POSITION_NORMAL &&
|
|
mStyle.useSyntheticPosition &&
|
|
(aTextRun->GetShapingState() ==
|
|
gfxTextRun::eShapingState_ForceFallbackFeature ||
|
|
!matchedFont->SupportsSubSuperscript(mStyle.variantSubSuper, aString,
|
|
aLength, aRunScript))) {
|
|
// fallback for subscript/superscript variant glyphs
|
|
|
|
// if the feature was already used, abort and force
|
|
// fallback across the entire textrun
|
|
gfxTextRun::ShapingState ss = aTextRun->GetShapingState();
|
|
|
|
if (ss == gfxTextRun::eShapingState_Normal) {
|
|
aTextRun->SetShapingState(
|
|
gfxTextRun::eShapingState_ShapingWithFallback);
|
|
} else if (ss == gfxTextRun::eShapingState_ShapingWithFeature) {
|
|
aTextRun->SetShapingState(gfxTextRun::eShapingState_Aborted);
|
|
return;
|
|
}
|
|
|
|
RefPtr<gfxFont> subSuperFont = matchedFont->GetSubSuperscriptFont(
|
|
aTextRun->GetAppUnitsPerDevUnit());
|
|
aTextRun->AddGlyphRun(subSuperFont, range.matchType, aOffset + runStart,
|
|
(matchedLength > 0), range.orientation, isCJK);
|
|
if (!subSuperFont->SplitAndInitTextRun(
|
|
aDrawTarget, aTextRun, aString + runStart, aOffset + runStart,
|
|
matchedLength, aRunScript, mLanguage, range.orientation)) {
|
|
// glyph layout failed! treat as missing glyphs
|
|
matchedFont = nullptr;
|
|
}
|
|
} else if (mStyle.variantCaps != NS_FONT_VARIANT_CAPS_NORMAL &&
|
|
mStyle.allowSyntheticSmallCaps &&
|
|
!matchedFont->SupportsVariantCaps(
|
|
aRunScript, mStyle.variantCaps, petiteToSmallCaps,
|
|
syntheticLower, syntheticUpper)) {
|
|
// fallback for small-caps variant glyphs
|
|
if (!matchedFont->InitFakeSmallCapsRun(
|
|
mPresContext, aDrawTarget, aTextRun, aString + runStart,
|
|
aOffset + runStart, matchedLength, range.matchType,
|
|
range.orientation, aRunScript,
|
|
mExplicitLanguage ? mLanguage.get() : nullptr, syntheticLower,
|
|
syntheticUpper)) {
|
|
matchedFont = nullptr;
|
|
}
|
|
} else {
|
|
// shape normally with variant feature enabled
|
|
gfxTextRun::ShapingState ss = aTextRun->GetShapingState();
|
|
|
|
// adjust the shaping state if necessary
|
|
if (ss == gfxTextRun::eShapingState_Normal) {
|
|
aTextRun->SetShapingState(
|
|
gfxTextRun::eShapingState_ShapingWithFeature);
|
|
} else if (ss == gfxTextRun::eShapingState_ShapingWithFallback) {
|
|
// already have shaping results using fallback, need to redo
|
|
aTextRun->SetShapingState(gfxTextRun::eShapingState_Aborted);
|
|
return;
|
|
}
|
|
|
|
// do glyph layout and record the resulting positioned glyphs
|
|
aTextRun->AddGlyphRun(matchedFont, range.matchType, aOffset + runStart,
|
|
(matchedLength > 0), range.orientation, isCJK);
|
|
if (!matchedFont->SplitAndInitTextRun(
|
|
aDrawTarget, aTextRun, aString + runStart, aOffset + runStart,
|
|
matchedLength, aRunScript, mLanguage, range.orientation)) {
|
|
// glyph layout failed! treat as missing glyphs
|
|
matchedFont = nullptr;
|
|
}
|
|
}
|
|
} else {
|
|
aTextRun->AddGlyphRun(mainFont, FontMatchType::Kind::kFontGroup,
|
|
aOffset + runStart, (matchedLength > 0),
|
|
range.orientation, isCJK);
|
|
}
|
|
|
|
if (!matchedFont) {
|
|
// We need to set cluster boundaries (and mark spaces) so that
|
|
// surrogate pairs, combining characters, etc behave properly,
|
|
// even if we don't have glyphs for them
|
|
aTextRun->SetupClusterBoundaries(aOffset + runStart, aString + runStart,
|
|
matchedLength);
|
|
|
|
// various "missing" characters may need special handling,
|
|
// so we check for them here
|
|
uint32_t runLimit = runStart + matchedLength;
|
|
for (uint32_t index = runStart; index < runLimit; index++) {
|
|
T ch = aString[index];
|
|
|
|
// tab and newline are not to be displayed as hexboxes,
|
|
// but do need to be recorded in the textrun
|
|
if (ch == '\n') {
|
|
aTextRun->SetIsNewline(aOffset + index);
|
|
continue;
|
|
}
|
|
if (ch == '\t') {
|
|
aTextRun->SetIsTab(aOffset + index);
|
|
continue;
|
|
}
|
|
|
|
// for 16-bit textruns only, check for surrogate pairs and
|
|
// special Unicode spaces; omit these checks in 8-bit runs
|
|
if constexpr (sizeof(T) == sizeof(char16_t)) {
|
|
if (index + 1 < aLength &&
|
|
NS_IS_SURROGATE_PAIR(ch, aString[index + 1])) {
|
|
uint32_t usv = SURROGATE_TO_UCS4(ch, aString[index + 1]);
|
|
aTextRun->SetMissingGlyph(aOffset + index, usv, mainFont);
|
|
index++;
|
|
if (!mSkipDrawing && !IsPUA(usv)) {
|
|
missingChars = true;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// check if this is a known Unicode whitespace character that
|
|
// we can render using the space glyph with a custom width
|
|
gfxFloat wid = mainFont->SynthesizeSpaceWidth(ch);
|
|
if (wid >= 0.0) {
|
|
nscoord advance =
|
|
aTextRun->GetAppUnitsPerDevUnit() * floor(wid + 0.5);
|
|
if (gfxShapedText::CompressedGlyph::IsSimpleAdvance(advance)) {
|
|
aTextRun->GetCharacterGlyphs()[aOffset + index].SetSimpleGlyph(
|
|
advance, mainFont->GetSpaceGlyph());
|
|
} else {
|
|
gfxTextRun::DetailedGlyph detailedGlyph;
|
|
detailedGlyph.mGlyphID = mainFont->GetSpaceGlyph();
|
|
detailedGlyph.mAdvance = advance;
|
|
aTextRun->SetDetailedGlyphs(aOffset + index, 1, &detailedGlyph);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (IsInvalidChar(ch)) {
|
|
// invalid chars are left as zero-width/invisible
|
|
continue;
|
|
}
|
|
|
|
// record char code so we can draw a box with the Unicode value
|
|
aTextRun->SetMissingGlyph(aOffset + index, ch, mainFont);
|
|
if (!mSkipDrawing && !IsPUA(ch)) {
|
|
missingChars = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
runStart += matchedLength;
|
|
}
|
|
|
|
if (aMFR && missingChars) {
|
|
aMFR->RecordScript(aRunScript);
|
|
}
|
|
}
|
|
|
|
gfxTextRun* gfxFontGroup::GetEllipsisTextRun(
|
|
int32_t aAppUnitsPerDevPixel, gfx::ShapedTextFlags aFlags,
|
|
LazyReferenceDrawTargetGetter& aRefDrawTargetGetter) {
|
|
MOZ_ASSERT(!(aFlags & ~ShapedTextFlags::TEXT_ORIENT_MASK),
|
|
"flags here should only be used to specify orientation");
|
|
if (mCachedEllipsisTextRun &&
|
|
(mCachedEllipsisTextRun->GetFlags() &
|
|
ShapedTextFlags::TEXT_ORIENT_MASK) == aFlags &&
|
|
mCachedEllipsisTextRun->GetAppUnitsPerDevUnit() == aAppUnitsPerDevPixel) {
|
|
return mCachedEllipsisTextRun.get();
|
|
}
|
|
|
|
// Use a Unicode ellipsis if the font supports it,
|
|
// otherwise use three ASCII periods as fallback.
|
|
RefPtr<gfxFont> firstFont = GetFirstValidFont();
|
|
nsString ellipsis =
|
|
firstFont->HasCharacter(kEllipsisChar[0])
|
|
? nsDependentString(kEllipsisChar, std::size(kEllipsisChar) - 1)
|
|
: nsDependentString(kASCIIPeriodsChar,
|
|
std::size(kASCIIPeriodsChar) - 1);
|
|
|
|
RefPtr<DrawTarget> refDT = aRefDrawTargetGetter.GetRefDrawTarget();
|
|
Parameters params = {refDT, nullptr, nullptr,
|
|
nullptr, 0, aAppUnitsPerDevPixel};
|
|
mCachedEllipsisTextRun =
|
|
MakeTextRun(ellipsis.BeginReading(), ellipsis.Length(), ¶ms, aFlags,
|
|
nsTextFrameUtils::Flags(), nullptr);
|
|
if (!mCachedEllipsisTextRun) {
|
|
return nullptr;
|
|
}
|
|
// don't let the presence of a cached ellipsis textrun prolong the
|
|
// fontgroup's life
|
|
mCachedEllipsisTextRun->ReleaseFontGroup();
|
|
return mCachedEllipsisTextRun.get();
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::FindFallbackFaceForChar(
|
|
gfxFontFamily* aFamily, uint32_t aCh, uint32_t aNextCh,
|
|
eFontPresentation aPresentation) {
|
|
GlobalFontMatch data(aCh, aNextCh, mStyle, aPresentation);
|
|
aFamily->SearchAllFontsForChar(&data);
|
|
gfxFontEntry* fe = data.mBestMatch;
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
return fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::FindFallbackFaceForChar(
|
|
fontlist::Family* aFamily, uint32_t aCh, uint32_t aNextCh,
|
|
eFontPresentation aPresentation) {
|
|
auto* pfl = gfxPlatformFontList::PlatformFontList();
|
|
auto* list = pfl->SharedFontList();
|
|
|
|
// If async fallback is enabled, and the family isn't fully initialized yet,
|
|
// just start the async cmap loading and return.
|
|
if (!aFamily->IsFullyInitialized() &&
|
|
StaticPrefs::gfx_font_rendering_fallback_async() &&
|
|
!XRE_IsParentProcess()) {
|
|
pfl->StartCmapLoadingFromFamily(aFamily - list->Families());
|
|
return nullptr;
|
|
}
|
|
|
|
GlobalFontMatch data(aCh, aNextCh, mStyle, aPresentation);
|
|
aFamily->SearchAllFontsForChar(list, &data);
|
|
gfxFontEntry* fe = data.mBestMatch;
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
return fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::FindFallbackFaceForChar(
|
|
const FamilyFace& aFamily, uint32_t aCh, uint32_t aNextCh,
|
|
eFontPresentation aPresentation) {
|
|
if (aFamily.IsSharedFamily()) {
|
|
return FindFallbackFaceForChar(aFamily.SharedFamily(), aCh, aNextCh,
|
|
aPresentation);
|
|
}
|
|
return FindFallbackFaceForChar(aFamily.OwnedFamily(), aCh, aNextCh,
|
|
aPresentation);
|
|
}
|
|
|
|
gfxFloat gfxFontGroup::GetUnderlineOffset() {
|
|
if (mUnderlineOffset == UNDERLINE_OFFSET_NOT_SET) {
|
|
// if the fontlist contains a bad underline font, make the underline
|
|
// offset the min of the first valid font and bad font underline offsets
|
|
uint32_t len = mFonts.Length();
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
FamilyFace& ff = mFonts[i];
|
|
gfxFontEntry* fe = ff.FontEntry();
|
|
if (!fe) {
|
|
continue;
|
|
}
|
|
if (!fe->mIsUserFontContainer && !fe->IsUserFont() &&
|
|
((ff.IsSharedFamily() && ff.SharedFamily() &&
|
|
ff.SharedFamily()->IsBadUnderlineFamily()) ||
|
|
(!ff.IsSharedFamily() && ff.OwnedFamily() &&
|
|
ff.OwnedFamily()->IsBadUnderlineFamily()))) {
|
|
RefPtr<gfxFont> font = GetFontAt(i);
|
|
if (!font) {
|
|
continue;
|
|
}
|
|
gfxFloat bad =
|
|
font->GetMetrics(nsFontMetrics::eHorizontal).underlineOffset;
|
|
RefPtr<gfxFont> firstValidFont = GetFirstValidFont();
|
|
gfxFloat first = firstValidFont->GetMetrics(nsFontMetrics::eHorizontal)
|
|
.underlineOffset;
|
|
mUnderlineOffset = std::min(first, bad);
|
|
return mUnderlineOffset;
|
|
}
|
|
}
|
|
|
|
// no bad underline fonts, use the first valid font's metric
|
|
RefPtr<gfxFont> firstValidFont = GetFirstValidFont();
|
|
mUnderlineOffset =
|
|
firstValidFont->GetMetrics(nsFontMetrics::eHorizontal).underlineOffset;
|
|
}
|
|
|
|
return mUnderlineOffset;
|
|
}
|
|
|
|
#define NARROW_NO_BREAK_SPACE 0x202fu
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::FindFontForChar(
|
|
uint32_t aCh, uint32_t aPrevCh, uint32_t aNextCh, Script aRunScript,
|
|
gfxFont* aPrevMatchedFont, FontMatchType* aMatchType) {
|
|
// If the char is a cluster extender, we want to use the same font as the
|
|
// preceding character if possible. This is preferable to using the font
|
|
// group because it avoids breaks in shaping within a cluster.
|
|
if (aPrevMatchedFont && IsClusterExtender(aCh)) {
|
|
if (aPrevMatchedFont->HasCharacter(aCh) || IsDefaultIgnorable(aCh)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
// Check if this char and preceding char can compose; if so, is the
|
|
// combination supported by the current font.
|
|
uint32_t composed = intl::String::ComposePairNFC(aPrevCh, aCh);
|
|
if (composed > 0 && aPrevMatchedFont->HasCharacter(composed)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
}
|
|
|
|
// Special cases for NNBSP (as used in Mongolian):
|
|
if (aCh == NARROW_NO_BREAK_SPACE) {
|
|
// If there is no preceding character, try the font that we'd use
|
|
// for the next char (unless it's just another NNBSP; we don't try
|
|
// to look ahead through a whole run of them).
|
|
if (!aPrevCh && aNextCh && aNextCh != NARROW_NO_BREAK_SPACE) {
|
|
RefPtr<gfxFont> nextFont = FindFontForChar(aNextCh, 0, 0, aRunScript,
|
|
aPrevMatchedFont, aMatchType);
|
|
if (nextFont && nextFont->HasCharacter(aCh)) {
|
|
return nextFont.forget();
|
|
}
|
|
}
|
|
// Otherwise, treat NNBSP like a cluster extender (as above) and try
|
|
// to continue the preceding font run.
|
|
if (aPrevMatchedFont && aPrevMatchedFont->HasCharacter(aCh)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
}
|
|
|
|
// To optimize common cases, try the first font in the font-group
|
|
// before going into the more detailed checks below
|
|
uint32_t fontListLength = mFonts.Length();
|
|
uint32_t nextIndex = 0;
|
|
bool isJoinControl = gfxFontUtils::IsJoinControl(aCh);
|
|
bool wasJoinCauser = gfxFontUtils::IsJoinCauser(aPrevCh);
|
|
bool isVarSelector = gfxFontUtils::IsVarSelector(aCh);
|
|
bool nextIsVarSelector = gfxFontUtils::IsVarSelector(aNextCh);
|
|
|
|
// For Unicode hyphens, if not supported in the font then we'll try for
|
|
// the ASCII hyphen-minus as a fallback.
|
|
// Similarly, for NBSP we try normal <space> as a fallback.
|
|
uint32_t fallbackChar = (aCh == 0x2010 || aCh == 0x2011) ? '-'
|
|
: (aCh == 0x00A0) ? ' '
|
|
: 0;
|
|
|
|
// Whether we've seen a font that is currently loading a resource that may
|
|
// provide this character (so we should not start a new load).
|
|
bool loading = false;
|
|
|
|
// Do we need to explicitly look for a font that does or does not provide a
|
|
// color glyph for the given character?
|
|
// For characters with no `EMOJI` property, we'll use whatever the family
|
|
// list calls for; but if it's a potential emoji codepoint, we need to check
|
|
// if there's a variation selector specifically asking for Text-style or
|
|
// Emoji-style rendering and look for a suitable font.
|
|
eFontPresentation presentation = eFontPresentation::Any;
|
|
EmojiPresentation emojiPresentation = GetEmojiPresentation(aCh);
|
|
if (emojiPresentation != TextOnly) {
|
|
// Default presentation from the font-variant-emoji property.
|
|
presentation = mEmojiPresentation;
|
|
// If the prefer-emoji selector is present, or if it's a default-emoji
|
|
// char and the prefer-text selector is NOT present, or if there's a
|
|
// skin-tone modifier, we specifically look for a font with a color
|
|
// glyph.
|
|
// If the prefer-text selector is present, we specifically look for a
|
|
// font that will provide a monochrome glyph.
|
|
// Otherwise, we'll accept either color or monochrome font-family
|
|
// entries, so that a color font can be explicitly applied via font-
|
|
// family even to characters that are not inherently emoji-style.
|
|
if (aNextCh == kVariationSelector16 ||
|
|
(aNextCh >= kEmojiSkinToneFirst && aNextCh <= kEmojiSkinToneLast) ||
|
|
gfxFontUtils::IsEmojiFlagAndTag(aCh, aNextCh)) {
|
|
// Emoji presentation is explicitly requested by a variation selector
|
|
// or the presence of a skin-tone codepoint.
|
|
presentation = eFontPresentation::EmojiExplicit;
|
|
} else if (emojiPresentation == EmojiPresentation::EmojiDefault &&
|
|
aNextCh != kVariationSelector15) {
|
|
// Emoji presentation is the default for this Unicode character. but we
|
|
// will allow an explicitly-specified webfont to apply to it,
|
|
// regardless of its glyph type.
|
|
presentation = eFontPresentation::EmojiDefault;
|
|
} else if (aNextCh == kVariationSelector15) {
|
|
// Text presentation is explicitly requested.
|
|
presentation = eFontPresentation::Text;
|
|
}
|
|
}
|
|
|
|
if (!isJoinControl && !wasJoinCauser && !isVarSelector &&
|
|
!nextIsVarSelector && presentation == eFontPresentation::Any) {
|
|
RefPtr<gfxFont> firstFont = GetFontAt(0, aCh, &loading);
|
|
if (firstFont) {
|
|
if (firstFont->HasCharacter(aCh) ||
|
|
(fallbackChar && firstFont->HasCharacter(fallbackChar))) {
|
|
*aMatchType = {FontMatchType::Kind::kFontGroup, mFonts[0].Generic()};
|
|
return firstFont.forget();
|
|
}
|
|
|
|
RefPtr<gfxFont> font;
|
|
if (mFonts[0].CheckForFallbackFaces()) {
|
|
font = FindFallbackFaceForChar(mFonts[0], aCh, aNextCh, presentation);
|
|
} else if (!firstFont->GetFontEntry()->IsUserFont()) {
|
|
// For platform fonts (but not userfonts), we may need to do
|
|
// fallback within the family to handle cases where some faces
|
|
// such as Italic or Black have reduced character sets compared
|
|
// to the family's Regular face.
|
|
font = FindFallbackFaceForChar(mFonts[0], aCh, aNextCh, presentation);
|
|
}
|
|
if (font) {
|
|
*aMatchType = {FontMatchType::Kind::kFontGroup, mFonts[0].Generic()};
|
|
return font.forget();
|
|
}
|
|
} else {
|
|
if (fontListLength > 0) {
|
|
loading = loading || mFonts[0].IsLoadingFor(aCh);
|
|
}
|
|
}
|
|
|
|
// we don't need to check the first font again below
|
|
++nextIndex;
|
|
}
|
|
|
|
if (aPrevMatchedFont) {
|
|
// Don't switch fonts for control characters, regardless of
|
|
// whether they are present in the current font, as they won't
|
|
// actually be rendered (see bug 716229)
|
|
if (isJoinControl ||
|
|
GetGeneralCategory(aCh) == HB_UNICODE_GENERAL_CATEGORY_CONTROL) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
|
|
// if previous character was a join-causer (ZWJ),
|
|
// use the same font as the previous range if we can
|
|
if (wasJoinCauser) {
|
|
if (aPrevMatchedFont->HasCharacter(aCh)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this character is a variation selector or default-ignorable, use the
|
|
// previous font regardless of whether it supports the codepoint or not.
|
|
// (We don't want to unnecessarily split glyph runs, and the character will
|
|
// not be visibly rendered.)
|
|
if (isVarSelector || IsDefaultIgnorable(aCh)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
|
|
// Used to remember the first "candidate" font that would provide a fallback
|
|
// text-style rendering if no color glyph can be found.
|
|
// If we decide NOT to return this font, we must AddRef/Release it to ensure
|
|
// that it goes into the global font cache as a candidate for deletion.
|
|
// This is done for us by CheckCandidate, but any code path that returns
|
|
// WITHOUT calling CheckCandidate needs to handle it explicitly.
|
|
RefPtr<gfxFont> candidateFont;
|
|
FontMatchType candidateMatchType;
|
|
|
|
// Handle a candidate font that could support the character, returning true
|
|
// if we should go ahead and return |f|, false to continue searching.
|
|
// If there is already a saved candidate font, and the new candidate is
|
|
// accepted, we AddRef/Release the existing candidate so it won't leak.
|
|
auto CheckCandidate = [&](gfxFont* f, FontMatchType t) -> bool {
|
|
// If no preference, then just accept the font.
|
|
if (presentation == eFontPresentation::Any ||
|
|
(presentation == eFontPresentation::EmojiDefault &&
|
|
f->GetFontEntry()->IsUserFont())) {
|
|
*aMatchType = t;
|
|
return true;
|
|
}
|
|
// Does the candidate font provide a color glyph for the current character?
|
|
bool hasColorGlyph = f->HasColorGlyphFor(aCh, aNextCh);
|
|
// If the provided glyph matches the preference, accept the font.
|
|
if (hasColorGlyph == PrefersColor(presentation)) {
|
|
*aMatchType = t;
|
|
return true;
|
|
}
|
|
// If the character was a TextDefault char, but the next char is VS16,
|
|
// and the font is a COLR font that supports both these codepoints, then
|
|
// we'll assume it knows what it is doing (eg Twemoji Mozilla keycap
|
|
// sequences).
|
|
// TODO: reconsider all this as part of any fix for bug 543200.
|
|
if (aNextCh == kVariationSelector16 && emojiPresentation == TextDefault &&
|
|
f->HasCharacter(aNextCh) && f->GetFontEntry()->TryGetColorGlyphs()) {
|
|
return true;
|
|
}
|
|
// Otherwise, remember the first potential fallback, but keep searching.
|
|
if (!candidateFont) {
|
|
candidateFont = f;
|
|
candidateMatchType = t;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
// 1. check remaining fonts in the font group
|
|
for (uint32_t i = nextIndex; i < fontListLength; i++) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid() || ff.IsLoading()) {
|
|
if (ff.IsLoadingFor(aCh)) {
|
|
loading = true;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
RefPtr<gfxFont> font = ff.Font();
|
|
if (font) {
|
|
// if available, use already-made gfxFont and check for character
|
|
if (font->HasCharacter(aCh) ||
|
|
(fallbackChar && font->HasCharacter(fallbackChar))) {
|
|
if (CheckCandidate(font,
|
|
{FontMatchType::Kind::kFontGroup, ff.Generic()})) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
} else {
|
|
// don't have a gfxFont yet, test charmap before instantiating
|
|
gfxFontEntry* fe = ff.FontEntry();
|
|
if (fe && fe->mIsUserFontContainer) {
|
|
// for userfonts, need to test both the unicode range map and
|
|
// the cmap of the platform font entry
|
|
gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
|
|
|
|
// never match a character outside the defined unicode range
|
|
if (!ufe->CharacterInUnicodeRange(aCh)) {
|
|
continue;
|
|
}
|
|
|
|
// Load if not already loaded, unless we've already seen an in-
|
|
// progress load that is expected to satisfy this request.
|
|
if (!loading &&
|
|
ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
|
|
if (ff.IsLoading()) {
|
|
loading = true;
|
|
}
|
|
|
|
gfxFontEntry* pfe = ufe->GetPlatformFontEntry();
|
|
if (pfe && (pfe->HasCharacter(aCh) ||
|
|
(fallbackChar && pfe->HasCharacter(fallbackChar)))) {
|
|
font = GetFontAt(i, aCh, &loading);
|
|
if (font) {
|
|
if (CheckCandidate(font, {FontMatchType::Kind::kFontGroup,
|
|
mFonts[i].Generic()})) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
}
|
|
} else if (fe && (fe->HasCharacter(aCh) ||
|
|
(fallbackChar && fe->HasCharacter(fallbackChar)))) {
|
|
// for normal platform fonts, after checking the cmap
|
|
// build the font via GetFontAt
|
|
font = GetFontAt(i, aCh, &loading);
|
|
if (font) {
|
|
if (CheckCandidate(font, {FontMatchType::Kind::kFontGroup,
|
|
mFonts[i].Generic()})) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// check other family faces if needed
|
|
if (ff.CheckForFallbackFaces()) {
|
|
#ifdef DEBUG
|
|
if (i > 0) {
|
|
fontlist::FontList* list =
|
|
gfxPlatformFontList::PlatformFontList()->SharedFontList();
|
|
nsCString s1 = mFonts[i - 1].IsSharedFamily()
|
|
? mFonts[i - 1].SharedFamily()->Key().AsString(list)
|
|
: mFonts[i - 1].OwnedFamily()->Name();
|
|
nsCString s2 = ff.IsSharedFamily()
|
|
? ff.SharedFamily()->Key().AsString(list)
|
|
: ff.OwnedFamily()->Name();
|
|
MOZ_ASSERT(!mFonts[i - 1].CheckForFallbackFaces() || !s1.Equals(s2),
|
|
"should only do fallback once per font family");
|
|
}
|
|
#endif
|
|
font = FindFallbackFaceForChar(ff, aCh, aNextCh, presentation);
|
|
if (font) {
|
|
if (CheckCandidate(font,
|
|
{FontMatchType::Kind::kFontGroup, ff.Generic()})) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
} else {
|
|
// For platform fonts, but not user fonts, consider intra-family
|
|
// fallback to handle styles with reduced character sets (see
|
|
// also above).
|
|
gfxFontEntry* fe = ff.FontEntry();
|
|
if (fe && !fe->mIsUserFontContainer && !fe->IsUserFont()) {
|
|
font = FindFallbackFaceForChar(ff, aCh, aNextCh, presentation);
|
|
if (font) {
|
|
if (CheckCandidate(font,
|
|
{FontMatchType::Kind::kFontGroup, ff.Generic()})) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (fontListLength == 0) {
|
|
RefPtr<gfxFont> defaultFont = GetDefaultFont();
|
|
if (defaultFont->HasCharacter(aCh) ||
|
|
(fallbackChar && defaultFont->HasCharacter(fallbackChar))) {
|
|
if (CheckCandidate(defaultFont, FontMatchType::Kind::kFontGroup)) {
|
|
return defaultFont.forget();
|
|
}
|
|
}
|
|
}
|
|
|
|
// If character is in Private Use Area, or is unassigned in Unicode, don't do
|
|
// matching against pref or system fonts. We only support such codepoints
|
|
// when used with an explicitly-specified font, as they have no standard/
|
|
// interoperable meaning.
|
|
// Also don't attempt any fallback for control characters or noncharacters,
|
|
// where we won't be rendering a glyph anyhow, or for codepoints where global
|
|
// fallback has already noted a failure.
|
|
FontVisibility level =
|
|
mPresContext ? mPresContext->GetFontVisibility() : FontVisibility::User;
|
|
auto* pfl = gfxPlatformFontList::PlatformFontList();
|
|
if (pfl->SkipFontFallbackForChar(level, aCh) ||
|
|
(!StaticPrefs::gfx_font_rendering_fallback_unassigned_chars() &&
|
|
GetGeneralCategory(aCh) == HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED)) {
|
|
if (candidateFont) {
|
|
*aMatchType = candidateMatchType;
|
|
}
|
|
return candidateFont.forget();
|
|
}
|
|
|
|
// 2. search pref fonts
|
|
RefPtr<gfxFont> font = WhichPrefFontSupportsChar(aCh, aNextCh, presentation);
|
|
if (font) {
|
|
if (PrefersColor(presentation) && pfl->EmojiPrefHasUserValue()) {
|
|
// For emoji, always accept the font from preferences if it's explicitly
|
|
// user-set, even if it isn't actually a color-emoji font, as some users
|
|
// may want to set their emoji font preference to a monochrome font like
|
|
// Symbola.
|
|
// So a user-provided font.name-list.emoji preference takes precedence
|
|
// over the Unicode presentation style here.
|
|
RefPtr<gfxFont> autoRefDeref(candidateFont);
|
|
*aMatchType = FontMatchType::Kind::kPrefsFallback;
|
|
return font.forget();
|
|
}
|
|
if (CheckCandidate(font, FontMatchType::Kind::kPrefsFallback)) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
|
|
// For fallback searches, we don't want to use a color-emoji font unless
|
|
// emoji-style presentation is specifically required, so we map Any to
|
|
// Text here.
|
|
if (presentation == eFontPresentation::Any) {
|
|
presentation = eFontPresentation::Text;
|
|
}
|
|
|
|
// 3. use fallback fonts
|
|
// -- before searching for something else check the font used for the
|
|
// previous character
|
|
if (aPrevMatchedFont &&
|
|
(aPrevMatchedFont->HasCharacter(aCh) ||
|
|
(fallbackChar && aPrevMatchedFont->HasCharacter(fallbackChar)))) {
|
|
if (CheckCandidate(aPrevMatchedFont,
|
|
FontMatchType::Kind::kSystemFallback)) {
|
|
return do_AddRef(aPrevMatchedFont);
|
|
}
|
|
}
|
|
|
|
// for known "space" characters, don't do a full system-fallback search;
|
|
// we'll synthesize appropriate-width spaces instead of missing-glyph boxes
|
|
font = GetFirstValidFont();
|
|
if (GetGeneralCategory(aCh) == HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR &&
|
|
font->SynthesizeSpaceWidth(aCh) >= 0.0) {
|
|
return nullptr;
|
|
}
|
|
|
|
// -- otherwise look for other stuff
|
|
font = WhichSystemFontSupportsChar(aCh, aNextCh, aRunScript, presentation);
|
|
if (font) {
|
|
if (CheckCandidate(font, FontMatchType::Kind::kSystemFallback)) {
|
|
return font.forget();
|
|
}
|
|
}
|
|
if (candidateFont) {
|
|
*aMatchType = candidateMatchType;
|
|
}
|
|
return candidateFont.forget();
|
|
}
|
|
|
|
template <typename T>
|
|
void gfxFontGroup::ComputeRanges(nsTArray<TextRange>& aRanges, const T* aString,
|
|
uint32_t aLength, Script aRunScript,
|
|
gfx::ShapedTextFlags aOrientation) {
|
|
NS_ASSERTION(aRanges.Length() == 0, "aRanges must be initially empty");
|
|
NS_ASSERTION(aLength > 0, "don't call ComputeRanges for zero-length text");
|
|
|
|
uint32_t prevCh = 0;
|
|
uint32_t nextCh = aString[0];
|
|
if constexpr (sizeof(T) == sizeof(char16_t)) {
|
|
if (aLength > 1 && NS_IS_SURROGATE_PAIR(nextCh, aString[1])) {
|
|
nextCh = SURROGATE_TO_UCS4(nextCh, aString[1]);
|
|
}
|
|
}
|
|
int32_t lastRangeIndex = -1;
|
|
|
|
// initialize prevFont to the group's primary font, so that this will be
|
|
// used for string-initial control chars, etc rather than risk hitting font
|
|
// fallback for these (bug 716229)
|
|
StyleGenericFontFamily generic = StyleGenericFontFamily::None;
|
|
RefPtr<gfxFont> prevFont = GetFirstValidFont(' ', &generic);
|
|
|
|
// if we use the initial value of prevFont, we treat this as a match from
|
|
// the font group; fixes bug 978313
|
|
FontMatchType matchType = {FontMatchType::Kind::kFontGroup, generic};
|
|
|
|
for (uint32_t i = 0; i < aLength; i++) {
|
|
const uint32_t origI = i; // save off in case we increase for surrogate
|
|
|
|
// set up current ch
|
|
uint32_t ch = nextCh;
|
|
|
|
// Get next char (if any) so that FindFontForChar can look ahead
|
|
// for a possible variation selector.
|
|
|
|
if constexpr (sizeof(T) == sizeof(char16_t)) {
|
|
// In 16-bit case only, check for surrogate pairs.
|
|
if (ch > 0xffffu) {
|
|
i++;
|
|
}
|
|
if (i < aLength - 1) {
|
|
nextCh = aString[i + 1];
|
|
if (i + 2 < aLength && NS_IS_SURROGATE_PAIR(nextCh, aString[i + 2])) {
|
|
nextCh = SURROGATE_TO_UCS4(nextCh, aString[i + 2]);
|
|
}
|
|
} else {
|
|
nextCh = 0;
|
|
}
|
|
} else {
|
|
// 8-bit case is trivial.
|
|
nextCh = i < aLength - 1 ? aString[i + 1] : 0;
|
|
}
|
|
|
|
RefPtr<gfxFont> font;
|
|
|
|
// Find the font for this char; but try to avoid calling the expensive
|
|
// FindFontForChar method for the most common case, where the first
|
|
// font in the list supports the current char, and it is not one of
|
|
// the special cases where FindFontForChar will attempt to propagate
|
|
// the font selected for an adjacent character, and does not need to
|
|
// consider emoji vs text presentation.
|
|
if ((font = GetFontAt(0, ch)) != nullptr && font->HasCharacter(ch) &&
|
|
// In 8-bit text, the only time emoji presentation might be needed
|
|
// is if it is explicitly requested with font-variant, as no 8-bit
|
|
// chars are emoji by default.
|
|
((sizeof(T) == sizeof(uint8_t) &&
|
|
(mEmojiPresentation != eFontPresentation::EmojiExplicit ||
|
|
GetEmojiPresentation(ch) == TextOnly)) ||
|
|
// For 16-bit text, we need to consider cluster extenders etc.
|
|
(sizeof(T) == sizeof(char16_t) &&
|
|
(!IsClusterExtender(ch) && ch != NARROW_NO_BREAK_SPACE &&
|
|
!gfxFontUtils::IsJoinControl(ch) &&
|
|
!gfxFontUtils::IsJoinCauser(prevCh) &&
|
|
!gfxFontUtils::IsVarSelector(ch) &&
|
|
GetEmojiPresentation(ch) == TextOnly)))) {
|
|
matchType = {FontMatchType::Kind::kFontGroup, mFonts[0].Generic()};
|
|
} else {
|
|
font =
|
|
FindFontForChar(ch, prevCh, nextCh, aRunScript, prevFont, &matchType);
|
|
}
|
|
|
|
#ifndef RELEASE_OR_BETA
|
|
if (MOZ_UNLIKELY(mTextPerf)) {
|
|
if (matchType.kind == FontMatchType::Kind::kPrefsFallback) {
|
|
mTextPerf->current.fallbackPrefs++;
|
|
} else if (matchType.kind == FontMatchType::Kind::kSystemFallback) {
|
|
mTextPerf->current.fallbackSystem++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
prevCh = ch;
|
|
|
|
ShapedTextFlags orient = aOrientation;
|
|
if (aOrientation == ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED) {
|
|
// For CSS text-orientation:mixed, we need to resolve orientation
|
|
// on a per-character basis using the UTR50 orientation property.
|
|
switch (GetVerticalOrientation(ch)) {
|
|
case VERTICAL_ORIENTATION_U:
|
|
case VERTICAL_ORIENTATION_Tu:
|
|
orient = ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT;
|
|
break;
|
|
case VERTICAL_ORIENTATION_Tr: {
|
|
// We check for a vertical presentation form first as that's
|
|
// likely to be cheaper than inspecting lookups to see if the
|
|
// 'vert' feature is going to handle this character, and if the
|
|
// presentation form is available then it will be used as
|
|
// fallback if needed, so it's OK if the feature is missing.
|
|
//
|
|
// Because "common" CJK punctuation characters in isolation will be
|
|
// resolved to Bopomofo script (as the first script listed in their
|
|
// ScriptExtensions property), but this is not always well supported
|
|
// by fonts' OpenType tables, we also try Han script; harfbuzz will
|
|
// apply a 'vert' feature from any available script (see
|
|
// https://github.com/harfbuzz/harfbuzz/issues/63) when shaping,
|
|
// so this is OK. It's not quite as general as what harfbuzz does
|
|
// (it will find the feature in *any* script), but should be enough
|
|
// for likely real-world examples.
|
|
uint32_t v = gfxHarfBuzzShaper::GetVerticalPresentationForm(ch);
|
|
const uint32_t kVert = HB_TAG('v', 'e', 'r', 't');
|
|
orient = (!font || (v && font->HasCharacter(v)) ||
|
|
font->FeatureWillHandleChar(aRunScript, kVert, ch) ||
|
|
(aRunScript == Script::BOPOMOFO &&
|
|
font->FeatureWillHandleChar(Script::HAN, kVert, ch)))
|
|
? ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT
|
|
: ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
|
break;
|
|
}
|
|
case VERTICAL_ORIENTATION_R:
|
|
orient = ShapedTextFlags::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (lastRangeIndex == -1) {
|
|
// first char ==> make a new range
|
|
aRanges.AppendElement(TextRange(0, 1, font, matchType, orient));
|
|
lastRangeIndex++;
|
|
prevFont = std::move(font);
|
|
} else {
|
|
// if font or orientation has changed, make a new range...
|
|
// unless ch is a variation selector (bug 1248248)
|
|
TextRange& prevRange = aRanges[lastRangeIndex];
|
|
if (prevRange.font != font ||
|
|
(prevRange.orientation != orient && !IsClusterExtender(ch))) {
|
|
// close out the previous range
|
|
prevRange.end = origI;
|
|
aRanges.AppendElement(TextRange(origI, i + 1, font, matchType, orient));
|
|
lastRangeIndex++;
|
|
|
|
// update prevFont for the next match, *unless* we switched
|
|
// fonts on a ZWJ, in which case propagating the changed font
|
|
// is probably not a good idea (see bug 619511)
|
|
if (sizeof(T) == sizeof(uint8_t) || !gfxFontUtils::IsJoinCauser(ch)) {
|
|
prevFont = std::move(font);
|
|
}
|
|
} else {
|
|
prevRange.matchType |= matchType;
|
|
}
|
|
}
|
|
}
|
|
|
|
aRanges[lastRangeIndex].end = aLength;
|
|
|
|
#ifndef RELEASE_OR_BETA
|
|
LogModule* log = mStyle.systemFont ? gfxPlatform::GetLog(eGfxLog_textrunui)
|
|
: gfxPlatform::GetLog(eGfxLog_textrun);
|
|
|
|
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Debug))) {
|
|
nsAutoCString lang;
|
|
mLanguage->ToUTF8String(lang);
|
|
auto defaultLanguageGeneric = GetDefaultGeneric(mLanguage);
|
|
|
|
// collect the font matched for each range
|
|
nsAutoCString fontMatches;
|
|
for (size_t i = 0, i_end = aRanges.Length(); i < i_end; i++) {
|
|
const TextRange& r = aRanges[i];
|
|
nsAutoCString matchTypes;
|
|
if (r.matchType.kind & FontMatchType::Kind::kFontGroup) {
|
|
matchTypes.AppendLiteral("list");
|
|
}
|
|
if (r.matchType.kind & FontMatchType::Kind::kPrefsFallback) {
|
|
if (!matchTypes.IsEmpty()) {
|
|
matchTypes.AppendLiteral(",");
|
|
}
|
|
matchTypes.AppendLiteral("prefs");
|
|
}
|
|
if (r.matchType.kind & FontMatchType::Kind::kSystemFallback) {
|
|
if (!matchTypes.IsEmpty()) {
|
|
matchTypes.AppendLiteral(",");
|
|
}
|
|
matchTypes.AppendLiteral("sys");
|
|
}
|
|
fontMatches.AppendPrintf(
|
|
" [%u:%u] %.200s (%s)", r.start, r.end,
|
|
(r.font.get() ? r.font->GetName().get() : "<null>"),
|
|
matchTypes.get());
|
|
}
|
|
MOZ_LOG(log, LogLevel::Debug,
|
|
("(%s-fontmatching) fontgroup: [%s] default: %s lang: %s script: %d"
|
|
"%s\n",
|
|
(mStyle.systemFont ? "textrunui" : "textrun"),
|
|
FamilyListToString(mFamilyList).get(),
|
|
(defaultLanguageGeneric == StyleGenericFontFamily::Serif
|
|
? "serif"
|
|
: (defaultLanguageGeneric == StyleGenericFontFamily::SansSerif
|
|
? "sans-serif"
|
|
: "none")),
|
|
lang.get(), static_cast<int>(aRunScript), fontMatches.get()));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
gfxUserFontSet* gfxFontGroup::GetUserFontSet() { return mUserFontSet; }
|
|
|
|
void gfxFontGroup::SetUserFontSet(gfxUserFontSet* aUserFontSet) {
|
|
if (aUserFontSet == mUserFontSet) {
|
|
return;
|
|
}
|
|
mUserFontSet = aUserFontSet;
|
|
mCurrGeneration = GetGeneration() - 1;
|
|
UpdateUserFonts();
|
|
}
|
|
|
|
uint64_t gfxFontGroup::GetGeneration() {
|
|
return mUserFontSet ? mUserFontSet->GetGeneration() : 0;
|
|
}
|
|
|
|
uint64_t gfxFontGroup::GetRebuildGeneration() {
|
|
return mUserFontSet ? mUserFontSet->GetRebuildGeneration() : 0;
|
|
}
|
|
|
|
void gfxFontGroup::UpdateUserFonts() {
|
|
if (mCurrGeneration < GetRebuildGeneration()) {
|
|
// fonts in userfont set changed, need to redo the fontlist
|
|
mResolvedFonts = false;
|
|
ClearCachedData();
|
|
mCurrGeneration = GetGeneration();
|
|
} else if (mCurrGeneration != GetGeneration()) {
|
|
// load state change occurred, verify load state and validity of fonts
|
|
ClearCachedData();
|
|
uint32_t len = mFonts.Length();
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.Font() || !ff.IsUserFontContainer()) {
|
|
continue;
|
|
}
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
mCurrGeneration = GetGeneration();
|
|
}
|
|
}
|
|
|
|
bool gfxFontGroup::ContainsUserFont(const gfxUserFontEntry* aUserFont) {
|
|
UpdateUserFonts();
|
|
|
|
// If we have resolved the font list to concrete font faces, search through
|
|
// the list for a specific user font face.
|
|
if (mResolvedFonts) {
|
|
uint32_t len = mFonts.Length();
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.EqualsUserFont(aUserFont)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// If the font list is currently not resolved, we assume it might use the
|
|
// given face. (This method is only called when we have already seen that
|
|
// the family name is present in the list.)
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::WhichPrefFontSupportsChar(
|
|
uint32_t aCh, uint32_t aNextCh, eFontPresentation aPresentation) {
|
|
eFontPrefLang charLang;
|
|
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
|
|
|
|
if (PrefersColor(aPresentation)) {
|
|
charLang = eFontPrefLang_Emoji;
|
|
} else {
|
|
// get the pref font list if it hasn't been set up already
|
|
charLang = pfl->GetFontPrefLangFor(aCh);
|
|
}
|
|
|
|
// if the last pref font was the first family in the pref list, no need to
|
|
// recheck through a list of families
|
|
if (mLastPrefFont && charLang == mLastPrefLang && mLastPrefFirstFont &&
|
|
mLastPrefFont->HasCharacter(aCh)) {
|
|
return do_AddRef(mLastPrefFont);
|
|
}
|
|
|
|
// based on char lang and page lang, set up list of pref lang fonts to check
|
|
eFontPrefLang prefLangs[kMaxLenPrefLangList];
|
|
uint32_t i, numLangs = 0;
|
|
|
|
pfl->GetLangPrefs(prefLangs, numLangs, charLang, mPageLang);
|
|
|
|
for (i = 0; i < numLangs; i++) {
|
|
eFontPrefLang currentLang = prefLangs[i];
|
|
StyleGenericFontFamily generic =
|
|
mFallbackGeneric != StyleGenericFontFamily::None
|
|
? mFallbackGeneric
|
|
: pfl->GetDefaultGeneric(currentLang);
|
|
gfxPlatformFontList::PrefFontList* families =
|
|
pfl->GetPrefFontsLangGroup(mPresContext, generic, currentLang);
|
|
NS_ASSERTION(families, "no pref font families found");
|
|
|
|
// find the first pref font that includes the character
|
|
uint32_t j, numPrefs;
|
|
numPrefs = families->Length();
|
|
for (j = 0; j < numPrefs; j++) {
|
|
// look up the appropriate face
|
|
FontFamily family = (*families)[j];
|
|
if (family.IsNull()) {
|
|
continue;
|
|
}
|
|
|
|
// if a pref font is used, it's likely to be used again in the same text
|
|
// run. the style doesn't change so the face lookup can be cached rather
|
|
// than calling FindOrMakeFont repeatedly. speeds up FindFontForChar
|
|
// lookup times for subsequent pref font lookups
|
|
if (family == mLastPrefFamily && mLastPrefFont->HasCharacter(aCh)) {
|
|
return do_AddRef(mLastPrefFont);
|
|
}
|
|
|
|
gfxFontEntry* fe = nullptr;
|
|
if (family.mShared) {
|
|
fontlist::Family* fam = family.mShared;
|
|
if (!fam->IsInitialized()) {
|
|
Unused << pfl->InitializeFamily(fam);
|
|
}
|
|
fontlist::Face* face =
|
|
fam->FindFaceForStyle(pfl->SharedFontList(), mStyle);
|
|
if (face) {
|
|
fe = pfl->GetOrCreateFontEntry(face, fam);
|
|
}
|
|
} else {
|
|
fe = family.mUnshared->FindFontForStyle(mStyle);
|
|
}
|
|
if (!fe) {
|
|
continue;
|
|
}
|
|
|
|
// if ch in cmap, create and return a gfxFont
|
|
RefPtr<gfxFont> prefFont;
|
|
if (fe->HasCharacter(aCh)) {
|
|
prefFont = fe->FindOrMakeFont(&mStyle);
|
|
if (!prefFont) {
|
|
continue;
|
|
}
|
|
if (aPresentation == eFontPresentation::EmojiExplicit &&
|
|
!prefFont->HasColorGlyphFor(aCh, aNextCh)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// If the char was not available, see if we can fall back to an
|
|
// alternative face in the same family.
|
|
if (!prefFont) {
|
|
prefFont = family.mShared
|
|
? FindFallbackFaceForChar(family.mShared, aCh, aNextCh,
|
|
aPresentation)
|
|
: FindFallbackFaceForChar(family.mUnshared, aCh, aNextCh,
|
|
aPresentation);
|
|
}
|
|
if (prefFont) {
|
|
mLastPrefFamily = family;
|
|
mLastPrefFont = prefFont;
|
|
mLastPrefLang = charLang;
|
|
mLastPrefFirstFont = (i == 0 && j == 0);
|
|
return prefFont.forget();
|
|
}
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
already_AddRefed<gfxFont> gfxFontGroup::WhichSystemFontSupportsChar(
|
|
uint32_t aCh, uint32_t aNextCh, Script aRunScript,
|
|
eFontPresentation aPresentation) {
|
|
FontVisibility visibility;
|
|
return gfxPlatformFontList::PlatformFontList()->SystemFindFontForChar(
|
|
mPresContext, aCh, aNextCh, aRunScript, aPresentation, &mStyle,
|
|
&visibility);
|
|
}
|
|
|
|
gfxFont::Metrics gfxFontGroup::GetMetricsForCSSUnits(
|
|
gfxFont::Orientation aOrientation) {
|
|
bool isFirst;
|
|
RefPtr<gfxFont> font = GetFirstValidFont(0x20, nullptr, &isFirst);
|
|
auto metrics = font->GetMetrics(aOrientation);
|
|
|
|
// If the font we used to get metrics was not the first in the list,
|
|
// or if it doesn't support the ZERO character, check for the font that
|
|
// does support ZERO and use its metrics for the 'ch' unit.
|
|
if (!isFirst || !font->HasCharacter('0')) {
|
|
RefPtr<gfxFont> zeroFont = GetFirstValidFont('0');
|
|
if (zeroFont != font) {
|
|
const auto& zeroMetrics = zeroFont->GetMetrics(aOrientation);
|
|
metrics.zeroWidth = zeroMetrics.zeroWidth;
|
|
}
|
|
}
|
|
|
|
// Likewise for the WATER ideograph character used as the basis for 'ic'.
|
|
if (!isFirst || !font->HasCharacter(0x6C34)) {
|
|
RefPtr<gfxFont> icFont = GetFirstValidFont(0x6C34);
|
|
if (icFont != font) {
|
|
const auto& icMetrics = icFont->GetMetrics(aOrientation);
|
|
metrics.ideographicWidth = icMetrics.ideographicWidth;
|
|
}
|
|
}
|
|
|
|
return metrics;
|
|
}
|
|
|
|
void gfxMissingFontRecorder::Flush() {
|
|
static bool mNotifiedFontsInitialized = false;
|
|
static uint32_t mNotifiedFonts[gfxMissingFontRecorder::kNumScriptBitsWords];
|
|
if (!mNotifiedFontsInitialized) {
|
|
memset(&mNotifiedFonts, 0, sizeof(mNotifiedFonts));
|
|
mNotifiedFontsInitialized = true;
|
|
}
|
|
|
|
nsAutoString fontNeeded;
|
|
for (uint32_t i = 0; i < kNumScriptBitsWords; ++i) {
|
|
mMissingFonts[i] &= ~mNotifiedFonts[i];
|
|
if (!mMissingFonts[i]) {
|
|
continue;
|
|
}
|
|
for (uint32_t j = 0; j < 32; ++j) {
|
|
if (!(mMissingFonts[i] & (1 << j))) {
|
|
continue;
|
|
}
|
|
mNotifiedFonts[i] |= (1 << j);
|
|
if (!fontNeeded.IsEmpty()) {
|
|
fontNeeded.Append(char16_t(','));
|
|
}
|
|
uint32_t sc = i * 32 + j;
|
|
MOZ_ASSERT(sc < static_cast<uint32_t>(Script::NUM_SCRIPT_CODES),
|
|
"how did we set the bit for an invalid script code?");
|
|
uint32_t tag = GetScriptTagForCode(static_cast<Script>(sc));
|
|
fontNeeded.Append(char16_t(tag >> 24));
|
|
fontNeeded.Append(char16_t((tag >> 16) & 0xff));
|
|
fontNeeded.Append(char16_t((tag >> 8) & 0xff));
|
|
fontNeeded.Append(char16_t(tag & 0xff));
|
|
}
|
|
mMissingFonts[i] = 0;
|
|
}
|
|
if (!fontNeeded.IsEmpty()) {
|
|
nsCOMPtr<nsIObserverService> service = GetObserverService();
|
|
service->NotifyObservers(nullptr, "font-needed", fontNeeded.get());
|
|
}
|
|
}
|