зеркало из https://github.com/mozilla/gecko-dev.git
3513 строки
133 KiB
C++
3513 строки
133 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set ts=4 et sw=4 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 "gfxGlyphExtents.h"
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#include "gfxPlatformFontList.h"
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#include "gfxUserFontSet.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/Sprintf.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 "gfxScriptItemizer.h"
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#include "nsUnicodeProperties.h"
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#include "nsUnicodeRange.h"
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#include "nsStyleConsts.h"
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#include "nsStyleUtil.h"
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#include "mozilla/Likely.h"
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#include "gfx2DGlue.h"
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#include "mozilla/gfx/Logging.h" // for gfxCriticalError
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#include "mozilla/UniquePtr.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::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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bool
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gfxTextRun::GlyphRunIterator::NextRun()
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{
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uint32_t glyphRunCount;
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if (mTextRun->mHasGlyphRunArray) {
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glyphRunCount = mTextRun->mGlyphRunArray.Length();
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if (mNextIndex >= glyphRunCount) {
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return false;
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}
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mGlyphRun = &mTextRun->mGlyphRunArray[mNextIndex];
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} else {
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if (mNextIndex > 0 || !mTextRun->mSingleGlyphRun.mFont) {
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return false;
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}
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glyphRunCount = 1;
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mGlyphRun = &mTextRun->mSingleGlyphRun;
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}
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if (mGlyphRun->mCharacterOffset >= mEndOffset) {
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return false;
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}
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mStringStart = std::max(mStartOffset, mGlyphRun->mCharacterOffset);
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uint32_t last = mNextIndex + 1 < glyphRunCount
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? mTextRun->mGlyphRunArray[mNextIndex + 1].mCharacterOffset
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: mTextRun->GetLength();
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mStringEnd = std::min(mEndOffset, last);
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++mNextIndex;
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return true;
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}
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#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
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static void
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AccountStorageForTextRun(gfxTextRun *aTextRun, int32_t aSign)
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{
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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 = std::max(gTextRunStorageHighWaterMark, gTextRunStorage);
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}
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#endif
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static bool
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NeedsGlyphExtents(gfxTextRun *aTextRun)
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{
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if (aTextRun->GetFlags() & gfx::ShapedTextFlags::TEXT_NEED_BOUNDING_BOX)
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return true;
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uint32_t numRuns;
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const gfxTextRun::GlyphRun *glyphRuns = aTextRun->GetGlyphRuns(&numRuns);
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for (uint32_t i = 0; i < numRuns; ++i) {
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if (glyphRuns[i].mFont->GetFontEntry()->IsUserFont())
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return true;
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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 *
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gfxTextRun::AllocateStorageForTextRun(size_t aSize, uint32_t aLength)
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{
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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>
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gfxTextRun::Create(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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{
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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 = new (storage) gfxTextRun(aParams, aLength,
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aFontGroup,
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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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, mSingleGlyphRun()
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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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, mHasGlyphRunArray(false)
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, mShapingState(eShapingState_Normal)
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{
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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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mSkipDrawing = mFontGroup->ShouldSkipDrawing();
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}
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gfxTextRun::~gfxTextRun()
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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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#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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if (mHasGlyphRunArray) {
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mGlyphRunArray.~nsTArray<GlyphRun>();
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} else {
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mSingleGlyphRun.mFont = nullptr;
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}
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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
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gfxTextRun::ReleaseFontGroup()
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{
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NS_ASSERTION(!mReleasedFontGroup, "doubly released!");
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NS_RELEASE(mFontGroup);
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mReleasedFontGroup = true;
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}
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bool
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gfxTextRun::SetPotentialLineBreaks(Range aRange, const uint8_t* aBreakBefore)
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{
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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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changed |= cg->SetCanBreakBefore(canBreak);
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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
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gfxTextRun::ComputeLigatureData(Range aPartRange,
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PropertyProvider *aProvider) const
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{
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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 = 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(
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Range(aPartRange.start, aPartRange.start + 1), &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(
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Range(aPartRange.end - 1, aPartRange.end), &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
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gfxTextRun::ComputePartialLigatureWidth(Range aPartRange,
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PropertyProvider *aProvider) const
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{
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if (aPartRange.start >= aPartRange.end)
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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
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gfxTextRun::GetAdvanceForGlyphs(Range aRange) const
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{
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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
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GetAdjustedSpacing(const gfxTextRun *aTextRun, gfxTextRun::Range aRange,
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gfxTextRun::PropertyProvider *aProvider,
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gfxTextRun::PropertyProvider::Spacing *aSpacing)
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{
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if (aRange.start >= aRange.end)
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return;
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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 = 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 ||
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aSpacing[i - aRange.start].mBefore == 0,
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"Before-spacing inside a ligature!");
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NS_ASSERTION(i - 1 <= aRange.start ||
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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
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gfxTextRun::GetAdjustedSpacingArray(Range aRange, PropertyProvider *aProvider,
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Range aSpacingRange,
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nsTArray<PropertyProvider::Spacing>*
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aSpacing) const
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{
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if (!aProvider || !(mFlags & gfx::ShapedTextFlags::TEXT_ENABLE_SPACING))
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return false;
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if (!aSpacing->AppendElements(aRange.Length()))
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return false;
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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() + aSpacingRange.end - aRange.start, 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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void
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gfxTextRun::ShrinkToLigatureBoundaries(Range* aRange) const
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{
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if (aRange->start >= aRange->end)
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return;
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const CompressedGlyph *charGlyphs = mCharacterGlyphs;
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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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}
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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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}
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}
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}
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void
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gfxTextRun::DrawGlyphs(gfxFont* aFont, Range aRange, gfx::Point* aPt,
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PropertyProvider* aProvider, Range aSpacingRange,
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TextRunDrawParams& aParams,
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gfx::ShapedTextFlags aOrientation) const
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{
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AutoTArray<PropertyProvider::Spacing,200> spacingBuffer;
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bool haveSpacing = GetAdjustedSpacingArray(aRange, aProvider,
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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
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ClipPartialLigature(const gfxTextRun* aTextRun,
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gfxFloat *aStart, gfxFloat *aEnd,
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gfxFloat aOrigin,
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gfxTextRun::LigatureData *aLigature)
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{
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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
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gfxTextRun::DrawPartialLigature(gfxFont* aFont, Range aRange,
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gfx::Point* aPt, PropertyProvider* aProvider,
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TextRunDrawParams& aParams,
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gfx::ShapedTextFlags aOrientation) const
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{
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if (aRange.start >= aRange.end) {
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return;
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}
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// Draw partial ligature. We hack this by clipping the ligature.
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LigatureData data = ComputeLigatureData(aRange, aProvider);
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gfxRect clipExtents = aParams.context->GetClipExtents();
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gfxFloat start, end;
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if (aParams.isVerticalRun) {
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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);
|
|
}
|
|
|
|
{
|
|
// 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);
|
|
|
|
aParams.context->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);
|
|
aParams.context->PopClip();
|
|
|
|
if (aParams.isVerticalRun) {
|
|
aPt->y += aParams.direction * data.mPartWidth;
|
|
} else {
|
|
aPt->x += aParams.direction * data.mPartWidth;
|
|
}
|
|
}
|
|
|
|
// Returns true if a glyph run is using a font with synthetic bolding enabled,
|
|
// or 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(const gfxTextRun *aRun, gfxTextRun::Range aRange)
|
|
{
|
|
gfxTextRun::GlyphRunIterator iter(aRun, aRange);
|
|
while (iter.NextRun()) {
|
|
gfxFont *font = iter.GetGlyphRun()->mFont;
|
|
if (font) {
|
|
if (font->IsSyntheticBold()) {
|
|
return true;
|
|
}
|
|
gfxFontEntry* fe = font->GetFontEntry();
|
|
if (fe->TryGetSVGData(font) || 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() {}
|
|
|
|
void PushSolidColor(const gfxRect& aBounds, const Color& aAlphaColor, uint32_t appsPerDevUnit)
|
|
{
|
|
mContext->Save();
|
|
mContext->NewPath();
|
|
mContext->Rectangle(gfxRect(aBounds.X() / appsPerDevUnit,
|
|
aBounds.Y() / appsPerDevUnit,
|
|
aBounds.Width() / appsPerDevUnit,
|
|
aBounds.Height() / appsPerDevUnit), true);
|
|
mContext->Clip();
|
|
mContext->SetColor(Color(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(Range aRange, 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 = mSkipDrawing;
|
|
if (aParams.drawMode & DrawMode::GLYPH_FILL) {
|
|
Color currentColor;
|
|
if (aParams.context->GetDeviceColor(currentColor) &&
|
|
currentColor.a == 0 && !aParams.context->GetTextDrawer()) {
|
|
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);
|
|
Color currentColor;
|
|
bool needToRestore = false;
|
|
|
|
if (aParams.drawMode & DrawMode::GLYPH_FILL &&
|
|
aParams.context->HasNonOpaqueNonTransparentColor(currentColor) &&
|
|
HasSyntheticBoldOrColor(this, aRange) &&
|
|
!aParams.context->GetTextDrawer()) {
|
|
|
|
needToRestore = true;
|
|
// Measure text; use the bounding box to determine the area we need
|
|
// to buffer.
|
|
gfxTextRun::Metrics metrics = MeasureText(
|
|
aRange, gfxFont::LOOSE_INK_EXTENTS,
|
|
aParams.context->GetDrawTarget(), aParams.provider);
|
|
if (IsRightToLeft()) {
|
|
metrics.mBoundingBox.MoveBy(gfxPoint(aPt.x - metrics.mAdvanceWidth,
|
|
aPt.y));
|
|
} else {
|
|
metrics.mBoundingBox.MoveBy(gfxPoint(aPt.x, aPt.y));
|
|
}
|
|
syntheticBoldBuffer.PushSolidColor(metrics.mBoundingBox, currentColor,
|
|
GetAppUnitsPerDevUnit());
|
|
}
|
|
|
|
// Set up parameters that will be constant across all glyph runs we need
|
|
// to draw, regardless of the font used.
|
|
TextRunDrawParams params;
|
|
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.textStrokePattern = aParams.textStrokePattern;
|
|
params.drawOpts = aParams.drawOpts;
|
|
params.drawMode = aParams.drawMode;
|
|
params.callbacks = aParams.callbacks;
|
|
params.runContextPaint = aParams.contextPaint;
|
|
params.paintSVGGlyphs = !aParams.callbacks ||
|
|
aParams.callbacks->mShouldPaintSVGGlyphs;
|
|
params.dt = aParams.context->GetDrawTarget();
|
|
|
|
GlyphRunIterator iter(this, aRange);
|
|
gfxFloat advance = 0.0;
|
|
|
|
while (iter.NextRun()) {
|
|
gfxFont *font = iter.GetGlyphRun()->mFont;
|
|
uint32_t start = iter.GetStringStart();
|
|
uint32_t end = iter.GetStringEnd();
|
|
Range ligatureRange(start, end);
|
|
ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
bool drawPartial = (aParams.drawMode & DrawMode::GLYPH_FILL) ||
|
|
(aParams.drawMode == DrawMode::GLYPH_PATH &&
|
|
aParams.callbacks);
|
|
gfx::Point origPt = aPt;
|
|
|
|
if (drawPartial) {
|
|
DrawPartialLigature(font, Range(start, ligatureRange.start),
|
|
&aPt, aParams.provider, params,
|
|
iter.GetGlyphRun()->mOrientation);
|
|
}
|
|
|
|
DrawGlyphs(font, ligatureRange, &aPt,
|
|
aParams.provider, ligatureRange, params,
|
|
iter.GetGlyphRun()->mOrientation);
|
|
|
|
if (drawPartial) {
|
|
DrawPartialLigature(font, Range(ligatureRange.end, end),
|
|
&aPt, aParams.provider, params,
|
|
iter.GetGlyphRun()->mOrientation);
|
|
}
|
|
|
|
if (params.isVerticalRun) {
|
|
advance += (aPt.y - origPt.y) * params.direction;
|
|
} else {
|
|
advance += (aPt.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, PropertyProvider* aProvider) const
|
|
{
|
|
MOZ_ASSERT(aRange.end <= GetLength());
|
|
|
|
EmphasisMarkDrawParams params;
|
|
params.context = aContext;
|
|
params.mark = aMark;
|
|
params.advance = aMarkAdvance;
|
|
params.direction = GetDirection();
|
|
params.isVertical = IsVertical();
|
|
|
|
float& inlineCoord = params.isVertical ? aPt.y : aPt.x;
|
|
float direction = params.direction;
|
|
|
|
GlyphRunIterator iter(this, aRange);
|
|
while (iter.NextRun()) {
|
|
gfxFont* font = iter.GetGlyphRun()->mFont;
|
|
uint32_t start = iter.GetStringStart();
|
|
uint32_t end = iter.GetStringEnd();
|
|
Range ligatureRange(start, end);
|
|
ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
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);
|
|
|
|
inlineCoord += direction * ComputePartialLigatureWidth(
|
|
Range(ligatureRange.end, end), aProvider);
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxTextRun::AccumulateMetricsForRun(gfxFont *aFont, Range aRange,
|
|
gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget,
|
|
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,
|
|
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,
|
|
PropertyProvider *aProvider) const
|
|
{
|
|
NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
|
|
|
|
Metrics accumulatedMetrics;
|
|
GlyphRunIterator iter(this, aRange);
|
|
while (iter.NextRun()) {
|
|
gfxFont *font = iter.GetGlyphRun()->mFont;
|
|
uint32_t start = iter.GetStringStart();
|
|
uint32_t end = iter.GetStringEnd();
|
|
Range ligatureRange(start, end);
|
|
ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
AccumulatePartialLigatureMetrics(
|
|
font, Range(start, ligatureRange.start),
|
|
aBoundingBoxType, aRefDrawTarget, aProvider,
|
|
iter.GetGlyphRun()->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.GetGlyphRun()->mOrientation, &accumulatedMetrics);
|
|
|
|
AccumulatePartialLigatureMetrics(
|
|
font, Range(ligatureRange.end, end),
|
|
aBoundingBoxType, aRefDrawTarget, aProvider,
|
|
iter.GetGlyphRun()->mOrientation, &accumulatedMetrics);
|
|
}
|
|
|
|
return accumulatedMetrics;
|
|
}
|
|
|
|
#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,
|
|
PropertyProvider *aProvider,
|
|
SuppressBreak aSuppressBreak,
|
|
gfxFloat *aTrimWhitespace,
|
|
bool aWhitespaceCanHang,
|
|
Metrics *aMetrics,
|
|
gfxFont::BoundingBoxType aBoundingBoxType,
|
|
DrawTarget* aRefDrawTarget,
|
|
bool *aUsedHyphenation,
|
|
uint32_t *aLastBreak,
|
|
bool aCanWordWrap,
|
|
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 = aProvider &&
|
|
!!(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 &&
|
|
(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() == 1;
|
|
bool atHyphenationBreak = !atNaturalBreak && haveHyphenation &&
|
|
hyphenBuffer[i - aStart] != HyphenType::None;
|
|
bool atAutoHyphenWithManualHyphenInSameWord = atHyphenationBreak &&
|
|
hyphenBuffer[i - aStart] == HyphenType::AutoWithManualInSameWord;
|
|
bool atBreak = atNaturalBreak || atHyphenationBreak;
|
|
bool wordWrapping =
|
|
aCanWordWrap && mCharacterGlyphs[i].IsClusterStart() &&
|
|
*aBreakPriority <= gfxBreakPriority::eWordWrapBreak;
|
|
|
|
if (atBreak || wordWrapping) {
|
|
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 ? 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 (aTrimWhitespace || aWhitespaceCanHang) {
|
|
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;
|
|
bool usedHyphenation = 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;
|
|
usedHyphenation = lastBreakUsedHyphenation;
|
|
} else {
|
|
charsFit = aMaxLength;
|
|
}
|
|
|
|
if (aMetrics) {
|
|
auto fitEnd = aStart + charsFit;
|
|
// Initially, measure everything, so that our bounding box includes
|
|
// any trimmable or hanging whitespace.
|
|
*aMetrics = MeasureText(Range(aStart, fitEnd),
|
|
aBoundingBoxType, aRefDrawTarget,
|
|
aProvider);
|
|
if (aTrimWhitespace || aWhitespaceCanHang) {
|
|
// Measure trailing whitespace that is to be trimmed/hung.
|
|
Metrics trimOrHangMetrics =
|
|
MeasureText(Range(fitEnd - trimmableChars, fitEnd),
|
|
aBoundingBoxType, aRefDrawTarget,
|
|
aProvider);
|
|
if (aTrimWhitespace) {
|
|
aMetrics->mAdvanceWidth -= trimOrHangMetrics.mAdvanceWidth;
|
|
} else if (aMetrics->mAdvanceWidth > aWidth) {
|
|
// Restrict width of hanging whitespace so it doesn't overflow.
|
|
aMetrics->mAdvanceWidth =
|
|
std::max(aWidth, aMetrics->mAdvanceWidth -
|
|
trimOrHangMetrics.mAdvanceWidth);
|
|
}
|
|
}
|
|
}
|
|
if (aTrimWhitespace) {
|
|
*aTrimWhitespace = trimmableAdvance;
|
|
}
|
|
if (aUsedHyphenation) {
|
|
*aUsedHyphenation = usedHyphenation;
|
|
}
|
|
if (aLastBreak && charsFit == aMaxLength) {
|
|
if (lastBreak < 0) {
|
|
*aLastBreak = UINT32_MAX;
|
|
} else {
|
|
*aLastBreak = lastBreak - aStart;
|
|
}
|
|
}
|
|
|
|
return charsFit;
|
|
}
|
|
|
|
gfxFloat
|
|
gfxTextRun::GetAdvanceWidth(Range aRange, PropertyProvider *aProvider,
|
|
PropertyProvider::Spacing* aSpacing) const
|
|
{
|
|
NS_ASSERTION(aRange.end <= GetLength(), "Substring out of range");
|
|
|
|
Range ligatureRange = aRange;
|
|
ShrinkToLigatureBoundaries(&ligatureRange);
|
|
|
|
gfxFloat result =
|
|
ComputePartialLigatureWidth(Range(aRange.start, ligatureRange.start),
|
|
aProvider) +
|
|
ComputePartialLigatureWidth(Range(ligatureRange.end, aRange.end),
|
|
aProvider);
|
|
|
|
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())) {
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
uint32_t
|
|
gfxTextRun::FindFirstGlyphRunContaining(uint32_t aOffset) const
|
|
{
|
|
NS_ASSERTION(aOffset <= GetLength(), "Bad offset looking for glyphrun");
|
|
NS_ASSERTION(GetLength() == 0 ||
|
|
(!mHasGlyphRunArray && mSingleGlyphRun.mFont) ||
|
|
(mHasGlyphRunArray && mGlyphRunArray.Length() > 0),
|
|
"non-empty text but no glyph runs present!");
|
|
if (!mHasGlyphRunArray) {
|
|
return 0;
|
|
}
|
|
if (aOffset == GetLength()) {
|
|
return mGlyphRunArray.Length();
|
|
}
|
|
uint32_t start = 0;
|
|
uint32_t end = mGlyphRunArray.Length();
|
|
while (end - start > 1) {
|
|
uint32_t mid = (start + end)/2;
|
|
if (mGlyphRunArray[mid].mCharacterOffset <= aOffset) {
|
|
start = mid;
|
|
} else {
|
|
end = mid;
|
|
}
|
|
}
|
|
NS_ASSERTION(mGlyphRunArray[start].mCharacterOffset <= aOffset,
|
|
"Hmm, something went wrong, aOffset should have been found");
|
|
return start;
|
|
}
|
|
|
|
nsresult
|
|
gfxTextRun::AddGlyphRun(gfxFont *aFont, gfxTextRange::MatchType aMatchType,
|
|
uint32_t aUTF16Offset, bool aForceNewRun,
|
|
gfx::ShapedTextFlags aOrientation)
|
|
{
|
|
NS_ASSERTION(aFont, "adding glyph run for null font!");
|
|
NS_ASSERTION(aOrientation != gfx::ShapedTextFlags::TEXT_ORIENT_VERTICAL_MIXED,
|
|
"mixed orientation should have been resolved");
|
|
if (!aFont) {
|
|
return NS_OK;
|
|
}
|
|
if (!mHasGlyphRunArray) {
|
|
// We don't currently have an array.
|
|
if (!mSingleGlyphRun.mFont) {
|
|
// This is the first glyph run: just store it directly.
|
|
mSingleGlyphRun.mFont = aFont;
|
|
mSingleGlyphRun.mMatchType = aMatchType;
|
|
mSingleGlyphRun.mOrientation = aOrientation;
|
|
mSingleGlyphRun.mCharacterOffset = aUTF16Offset;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
uint32_t numGlyphRuns = mHasGlyphRunArray ? mGlyphRunArray.Length() : 1;
|
|
if (!aForceNewRun && numGlyphRuns > 0) {
|
|
GlyphRun* lastGlyphRun =
|
|
mHasGlyphRunArray ? &mGlyphRunArray[numGlyphRuns - 1]
|
|
: &mSingleGlyphRun;
|
|
|
|
NS_ASSERTION(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->mFont == aFont &&
|
|
lastGlyphRun->mMatchType == aMatchType &&
|
|
lastGlyphRun->mOrientation == aOrientation)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
// 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 &&
|
|
mGlyphRunArray[numGlyphRuns - 2].mFont == aFont &&
|
|
mGlyphRunArray[numGlyphRuns - 2].mMatchType == aMatchType &&
|
|
mGlyphRunArray[numGlyphRuns - 2].mOrientation == aOrientation)
|
|
{
|
|
mGlyphRunArray.TruncateLength(numGlyphRuns - 1);
|
|
if (mGlyphRunArray.Length() == 1) {
|
|
ConvertFromGlyphRunArray();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
lastGlyphRun->mFont = aFont;
|
|
lastGlyphRun->mMatchType = aMatchType;
|
|
lastGlyphRun->mOrientation = aOrientation;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(aForceNewRun || numGlyphRuns > 0 || aUTF16Offset == 0,
|
|
"First run doesn't cover the first character (and run not forced)?");
|
|
|
|
if (!mHasGlyphRunArray) {
|
|
ConvertToGlyphRunArray();
|
|
}
|
|
|
|
GlyphRun* glyphRun = mGlyphRunArray.AppendElement();
|
|
if (!glyphRun) {
|
|
if (mGlyphRunArray.Length() == 1) {
|
|
ConvertFromGlyphRunArray();
|
|
}
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
glyphRun->mFont = aFont;
|
|
glyphRun->mCharacterOffset = aUTF16Offset;
|
|
glyphRun->mMatchType = aMatchType;
|
|
glyphRun->mOrientation = aOrientation;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
gfxTextRun::SortGlyphRuns()
|
|
{
|
|
if (!mHasGlyphRunArray) {
|
|
return;
|
|
}
|
|
|
|
// We should never have an empty or one-element array here; if there's only
|
|
// one glyphrun, it should be stored directly in the textrun without using
|
|
// an array at all.
|
|
MOZ_ASSERT(mGlyphRunArray.Length() > 1);
|
|
|
|
AutoTArray<GlyphRun,16> runs(std::move(mGlyphRunArray));
|
|
GlyphRunOffsetComparator comp;
|
|
runs.Sort(comp);
|
|
|
|
// Now copy back, coalescing adjacent glyph runs that have the same font
|
|
mGlyphRunArray.Clear();
|
|
gfxFont* prevFont = nullptr;
|
|
gfx::ShapedTextFlags prevOrient = gfx::ShapedTextFlags();
|
|
DebugOnly<uint32_t> prevOffset = 0;
|
|
for (auto& run : runs) {
|
|
// a GlyphRun with the same font and orientation as the previous can
|
|
// just be skipped; the last GlyphRun will cover its character range.
|
|
MOZ_ASSERT(run.mFont != nullptr);
|
|
if (prevFont == nullptr ||
|
|
run.mFont != prevFont || run.mOrientation != prevOrient) {
|
|
// If two fonts have the same character offset, Sort() will have
|
|
// randomized the order.
|
|
MOZ_ASSERT(prevFont == nullptr ||
|
|
run.mCharacterOffset != prevOffset,
|
|
"Two fonts for the same run, glyph indices unreliable");
|
|
prevFont = run.mFont;
|
|
prevOrient = run.mOrientation;
|
|
#ifdef DEBUG
|
|
prevOffset = run.mCharacterOffset;
|
|
#endif
|
|
if (!mGlyphRunArray.AppendElement(std::move(run))) {
|
|
NS_WARNING("Failed to append glyph run!");
|
|
}
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(mGlyphRunArray.Length() > 0);
|
|
if (mGlyphRunArray.Length() == 1) {
|
|
ConvertFromGlyphRunArray();
|
|
}
|
|
}
|
|
|
|
// Note that SanitizeGlyphRuns scans all glyph runs in the textrun;
|
|
// therefore we only call it once, at the end of textrun construction,
|
|
// NOT incrementally as each glyph run is added (bug 680402).
|
|
void
|
|
gfxTextRun::SanitizeGlyphRuns()
|
|
{
|
|
if (!mHasGlyphRunArray) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(mGlyphRunArray.Length() > 1);
|
|
|
|
// 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)
|
|
int32_t i, lastRunIndex = mGlyphRunArray.Length() - 1;
|
|
const CompressedGlyph *charGlyphs = mCharacterGlyphs;
|
|
for (i = lastRunIndex; i >= 0; --i) {
|
|
GlyphRun& run = mGlyphRunArray[i];
|
|
while (charGlyphs[run.mCharacterOffset].IsLigatureContinuation() &&
|
|
run.mCharacterOffset < GetLength()) {
|
|
run.mCharacterOffset++;
|
|
}
|
|
// if the run has become empty, eliminate it
|
|
if ((i < lastRunIndex &&
|
|
run.mCharacterOffset >= mGlyphRunArray[i+1].mCharacterOffset) ||
|
|
(i == lastRunIndex && run.mCharacterOffset == GetLength())) {
|
|
mGlyphRunArray.RemoveElementAt(i);
|
|
--lastRunIndex;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(mGlyphRunArray.Length() > 0);
|
|
if (mGlyphRunArray.Length() == 1) {
|
|
ConvertFromGlyphRunArray();
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
gfxTextRun::CountMissingGlyphs() const
|
|
{
|
|
uint32_t i;
|
|
uint32_t count = 0;
|
|
for (i = 0; i < GetLength(); ++i) {
|
|
if (mCharacterGlyphs[i].IsMissing()) {
|
|
++count;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
void
|
|
gfxTextRun::CopyGlyphDataFrom(gfxShapedWord *aShapedWord, uint32_t aOffset)
|
|
{
|
|
uint32_t wordLen = aShapedWord->GetLength();
|
|
NS_ASSERTION(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()) {
|
|
charGlyphs[aOffset] = g;
|
|
} else {
|
|
const DetailedGlyph *details =
|
|
g.GetGlyphCount() > 0 ?
|
|
aShapedWord->GetDetailedGlyphs(i) : nullptr;
|
|
SetGlyphs(aOffset, g, details);
|
|
}
|
|
}
|
|
} else {
|
|
memcpy(charGlyphs + aOffset, wordGlyphs,
|
|
wordLen * sizeof(CompressedGlyph));
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxTextRun::CopyGlyphDataFrom(gfxTextRun *aSource, Range aRange, uint32_t aDest)
|
|
{
|
|
NS_ASSERTION(aRange.end <= aSource->GetLength(),
|
|
"Source substring out of range");
|
|
NS_ASSERTION(aDest + aRange.Length() <= GetLength(),
|
|
"Destination substring out of range");
|
|
|
|
if (aSource->mSkipDrawing) {
|
|
mSkipDrawing = 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) {
|
|
DetailedGlyph *dst = AllocateDetailedGlyphs(i + aDest, count);
|
|
if (dst) {
|
|
DetailedGlyph *src =
|
|
aSource->GetDetailedGlyphs(i + aRange.start);
|
|
if (src) {
|
|
::memcpy(dst, src, count * sizeof(DetailedGlyph));
|
|
} else {
|
|
g.SetMissing(0);
|
|
}
|
|
} else {
|
|
g.SetMissing(0);
|
|
}
|
|
}
|
|
}
|
|
dstGlyphs[i] = g;
|
|
}
|
|
|
|
// Copy glyph runs
|
|
GlyphRunIterator iter(aSource, aRange);
|
|
#ifdef DEBUG
|
|
const GlyphRun *prevRun = nullptr;
|
|
#endif
|
|
while (iter.NextRun()) {
|
|
gfxFont *font = iter.GetGlyphRun()->mFont;
|
|
NS_ASSERTION(!prevRun || prevRun->mFont != iter.GetGlyphRun()->mFont ||
|
|
prevRun->mMatchType != iter.GetGlyphRun()->mMatchType ||
|
|
prevRun->mOrientation != iter.GetGlyphRun()->mOrientation,
|
|
"Glyphruns not coalesced?");
|
|
#ifdef DEBUG
|
|
prevRun = iter.GetGlyphRun();
|
|
uint32_t end = iter.GetStringEnd();
|
|
#endif
|
|
uint32_t start = iter.GetStringStart();
|
|
|
|
// 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");
|
|
|
|
nsresult rv = AddGlyphRun(font, iter.GetGlyphRun()->mMatchType,
|
|
start - aRange.start + aDest, false,
|
|
iter.GetGlyphRun()->mOrientation);
|
|
if (NS_FAILED(rv))
|
|
return;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
aFont->InitWordCache();
|
|
static const uint8_t space = ' ';
|
|
gfx::ShapedTextFlags
|
|
flags = gfx::ShapedTextFlags::TEXT_IS_8BIT |
|
|
aOrientation;
|
|
bool vertical =
|
|
!!(GetFlags() & gfx::ShapedTextFlags::TEXT_ORIENT_VERTICAL_UPRIGHT);
|
|
gfxFontShaper::RoundingFlags roundingFlags =
|
|
aFont->GetRoundOffsetsToPixels(aDrawTarget);
|
|
gfxShapedWord* sw = aFont->GetShapedWord(aDrawTarget,
|
|
&space, 1,
|
|
gfxShapedWord::HashMix(0, ' '),
|
|
Script::LATIN,
|
|
vertical,
|
|
mAppUnitsPerDevUnit,
|
|
flags,
|
|
roundingFlags,
|
|
nullptr);
|
|
if (sw) {
|
|
AddGlyphRun(aFont, gfxTextRange::MatchType::kFontGroup, aCharIndex,
|
|
false, aOrientation);
|
|
CopyGlyphDataFrom(sw, aCharIndex);
|
|
}
|
|
}
|
|
|
|
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) ?
|
|
gfxFont::eVertical : gfxFont::eHorizontal;
|
|
uint32_t spaceWidthAppUnits =
|
|
NS_lroundf(aFont->GetMetrics(fontOrientation).spaceWidth *
|
|
mAppUnitsPerDevUnit);
|
|
if (!CompressedGlyph::IsSimpleAdvance(spaceWidthAppUnits)) {
|
|
return false;
|
|
}
|
|
|
|
AddGlyphRun(aFont, gfxTextRange::MatchType::kFontGroup, aCharIndex, false,
|
|
aOrientation);
|
|
CompressedGlyph g =
|
|
CompressedGlyph::MakeSimpleGlyph(spaceWidthAppUnits, spaceGlyph);
|
|
if (aSpaceChar == ' ') {
|
|
g.SetIsSpace();
|
|
}
|
|
GetCharacterGlyphs()[aCharIndex] = g;
|
|
return true;
|
|
}
|
|
|
|
void
|
|
gfxTextRun::FetchGlyphExtents(DrawTarget* aRefDrawTarget)
|
|
{
|
|
bool needsGlyphExtents = NeedsGlyphExtents(this);
|
|
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()->size == 0) ||
|
|
MOZ_UNLIKELY(font->GetStyle()->sizeAdjust == 0.0f)) {
|
|
continue;
|
|
}
|
|
|
|
uint32_t start = run.mCharacterOffset;
|
|
uint32_t end = i + 1 < runCount ?
|
|
glyphRuns[i + 1].mCharacterOffset : GetLength();
|
|
uint32_t j;
|
|
gfxGlyphExtents *extents = font->GetOrCreateGlyphExtents(mAppUnitsPerDevUnit);
|
|
|
|
for (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->IsGlyphKnown(glyphIndex)) {
|
|
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
|
|
++gGlyphExtentsSetupEagerSimple;
|
|
#endif
|
|
font->SetupGlyphExtents(aRefDrawTarget,
|
|
glyphIndex, false, extents);
|
|
}
|
|
}
|
|
} 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->IsGlyphKnownWithTightExtents(glyphIndex)) {
|
|
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
|
|
++gGlyphExtentsSetupEagerTight;
|
|
#endif
|
|
font->SetupGlyphExtents(aRefDrawTarget,
|
|
glyphIndex, true, extents);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
size_t
|
|
gfxTextRun::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf)
|
|
{
|
|
// The second arg is how much gfxTextRun::AllocateStorage would have
|
|
// allocated.
|
|
size_t total = mHasGlyphRunArray
|
|
? mGlyphRunArray.ShallowSizeOfExcludingThis(aMallocSizeOf)
|
|
: 0;
|
|
|
|
if (mDetailedGlyphs) {
|
|
total += mDetailedGlyphs->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
return total;
|
|
}
|
|
|
|
size_t
|
|
gfxTextRun::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf)
|
|
{
|
|
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
gfxTextRun::Dump(FILE* aOutput) {
|
|
if (!aOutput) {
|
|
aOutput = stdout;
|
|
}
|
|
|
|
fputc('[', aOutput);
|
|
uint32_t numGlyphRuns;
|
|
const GlyphRun* glyphRuns = GetGlyphRuns(&numGlyphRuns);
|
|
for (uint32_t i = 0; i < numGlyphRuns; ++i) {
|
|
if (i > 0) {
|
|
fputc(',', aOutput);
|
|
}
|
|
gfxFont* font = glyphRuns[i].mFont;
|
|
const gfxFontStyle* style = font->GetStyle();
|
|
NS_ConvertUTF16toUTF8 fontName(font->GetName());
|
|
nsAutoString styleString;
|
|
nsStyleUtil::AppendFontSlantStyle(style->style, styleString);
|
|
nsAutoCString lang;
|
|
style->language->ToUTF8String(lang);
|
|
fprintf(aOutput, "%d: %s %f/%g/%s/%s", glyphRuns[i].mCharacterOffset,
|
|
fontName.get(), style->size,
|
|
style->weight.ToFloat(),
|
|
NS_ConvertUTF16toUTF8(styleString).get(),
|
|
lang.get());
|
|
}
|
|
fputc(']', aOutput);
|
|
}
|
|
#endif
|
|
|
|
gfxFontGroup::gfxFontGroup(const FontFamilyList& aFontFamilyList,
|
|
const gfxFontStyle *aStyle,
|
|
gfxTextPerfMetrics* aTextPerf,
|
|
gfxUserFontSet *aUserFontSet,
|
|
gfxFloat aDevToCssSize)
|
|
: mFamilyList(aFontFamilyList)
|
|
, mStyle(*aStyle)
|
|
, mUnderlineOffset(UNDERLINE_OFFSET_NOT_SET)
|
|
, mHyphenWidth(-1)
|
|
, mDevToCssSize(aDevToCssSize)
|
|
, mUserFontSet(aUserFontSet)
|
|
, mTextPerf(aTextPerf)
|
|
, mLastPrefLang(eFontPrefLang_Western)
|
|
, mPageLang(gfxPlatformFontList::GetFontPrefLangFor(aStyle->language))
|
|
, mLastPrefFirstFont(false)
|
|
, mSkipDrawing(false)
|
|
{
|
|
// We don't use SetUserFontSet() here, as we want to unconditionally call
|
|
// BuildFontList() rather than only do UpdateUserFonts() if it changed.
|
|
mCurrGeneration = GetGeneration();
|
|
BuildFontList();
|
|
}
|
|
|
|
gfxFontGroup::~gfxFontGroup()
|
|
{
|
|
// Should not be dropped by stylo
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
}
|
|
|
|
void
|
|
gfxFontGroup::BuildFontList()
|
|
{
|
|
// initialize fonts in the font family list
|
|
AutoTArray<FamilyAndGeneric,10> fonts;
|
|
gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
|
|
|
|
// lookup fonts in the fontlist
|
|
for (const FontFamilyName& name : mFamilyList.GetFontlist()->mNames) {
|
|
if (name.IsNamed()) {
|
|
AddPlatformFont(name.mName, fonts);
|
|
} else {
|
|
pfl->AddGenericFonts(name.mType, mStyle.language, fonts);
|
|
if (mTextPerf) {
|
|
mTextPerf->current.genericLookups++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// if necessary, append default generic onto the end
|
|
if (mFamilyList.GetDefaultFontType() != eFamily_none &&
|
|
!mFamilyList.HasDefaultGeneric()) {
|
|
pfl->AddGenericFonts(mFamilyList.GetDefaultFontType(),
|
|
mStyle.language, fonts);
|
|
if (mTextPerf) {
|
|
mTextPerf->current.genericLookups++;
|
|
}
|
|
}
|
|
|
|
// build the fontlist from the specified families
|
|
for (const auto& f : fonts) {
|
|
AddFamilyToFontList(f.mFamily, f.mGeneric);
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxFontGroup::AddPlatformFont(const nsAString& aName,
|
|
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.
|
|
gfxFontFamily* family = mUserFontSet->LookupFamily(aName);
|
|
if (family) {
|
|
aFamilyList.AppendElement(family);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Not known in the user font set ==> check system fonts
|
|
gfxPlatformFontList::PlatformFontList()
|
|
->FindAndAddFamilies(aName, &aFamilyList,
|
|
gfxPlatformFontList::FindFamiliesFlags(0),
|
|
&mStyle, mDevToCssSize);
|
|
}
|
|
|
|
void
|
|
gfxFontGroup::AddFamilyToFontList(gfxFontFamily* aFamily,
|
|
FontFamilyType aGeneric)
|
|
{
|
|
NS_ASSERTION(aFamily, "trying to add a null font family to fontlist");
|
|
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();
|
|
}
|
|
}
|
|
|
|
bool
|
|
gfxFontGroup::HasFont(const gfxFontEntry *aFontEntry)
|
|
{
|
|
uint32_t count = mFonts.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
if (mFonts[i].FontEntry() == aFontEntry) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::GetFontAt(int32_t i, uint32_t aCh)
|
|
{
|
|
if (uint32_t(i) >= mFonts.Length()) {
|
|
return nullptr;
|
|
}
|
|
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid() || ff.IsLoading()) {
|
|
return nullptr;
|
|
}
|
|
|
|
gfxFont* font = ff.Font();
|
|
if (!font) {
|
|
gfxFontEntry* fe = mFonts[i].FontEntry();
|
|
gfxCharacterMap* unicodeRangeMap = nullptr;
|
|
if (fe->mIsUserFontContainer) {
|
|
gfxUserFontEntry* ufe = static_cast<gfxUserFontEntry*>(fe);
|
|
if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
|
|
ufe->CharacterInUnicodeRange(aCh) &&
|
|
!FontLoadingForFamily(ff.Family(), aCh)) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
fe = ufe->GetPlatformFontEntry();
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
unicodeRangeMap = ufe->GetUnicodeRangeMap();
|
|
}
|
|
font = fe->FindOrMakeFont(&mStyle, unicodeRangeMap);
|
|
if (!font || !font->Valid()) {
|
|
ff.SetInvalid();
|
|
// We can't just |delete font| here, in case there are other
|
|
// references to the object FindOrMakeFont returned.
|
|
RefPtr<gfxFont> ref(font);
|
|
return nullptr;
|
|
}
|
|
mFonts[i].SetFont(font);
|
|
}
|
|
return font;
|
|
}
|
|
|
|
void
|
|
gfxFontGroup::FamilyFace::CheckState(bool& aSkipDrawing)
|
|
{
|
|
gfxFontEntry* fe = FontEntry();
|
|
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
|
|
MOZ_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;
|
|
}
|
|
|
|
bool
|
|
gfxFontGroup::FontLoadingForFamily(gfxFontFamily* aFamily, uint32_t aCh) const
|
|
{
|
|
uint32_t count = mFonts.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
const FamilyFace& ff = mFonts[i];
|
|
if (ff.IsLoading() && ff.Family() == aFamily) {
|
|
const gfxUserFontEntry* ufe =
|
|
static_cast<gfxUserFontEntry*>(ff.FontEntry());
|
|
if (ufe->CharacterInUnicodeRange(aCh)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::GetDefaultFont()
|
|
{
|
|
if (mDefaultFont) {
|
|
return mDefaultFont.get();
|
|
}
|
|
|
|
gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
|
|
gfxFontFamily *defaultFamily = pfl->GetDefaultFont(&mStyle);
|
|
NS_ASSERTION(defaultFamily,
|
|
"invalid default font returned by GetDefaultFont");
|
|
|
|
if (defaultFamily) {
|
|
gfxFontEntry *fe =
|
|
defaultFamily->FindFontForStyle(mStyle, true);
|
|
if (fe) {
|
|
mDefaultFont = fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
}
|
|
|
|
uint32_t numInits, loaderState;
|
|
pfl->GetFontlistInitInfo(numInits, loaderState);
|
|
NS_ASSERTION(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)
|
|
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) {
|
|
// 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
|
|
nsAutoString familiesString;
|
|
mFamilyList.ToString(familiesString);
|
|
SprintfLiteral(msg, "unable to find a usable font (%.220s)",
|
|
NS_ConvertUTF16toUTF8(familiesString).get());
|
|
MOZ_CRASH_UNSAFE_OOL(msg);
|
|
}
|
|
|
|
return mDefaultFont.get();
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::GetFirstValidFont(uint32_t aCh, FontFamilyType* aGeneric)
|
|
{
|
|
uint32_t count = mFonts.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid()) {
|
|
continue;
|
|
}
|
|
|
|
// already have a font?
|
|
gfxFont* font = ff.Font();
|
|
if (font) {
|
|
if (aGeneric) {
|
|
*aGeneric = ff.Generic();
|
|
}
|
|
return font;
|
|
}
|
|
|
|
// Need to build a font, loading userfont if not loaded. In
|
|
// cases where unicode range might apply, use the character
|
|
// provided.
|
|
if (ff.IsUserFontContainer()) {
|
|
gfxUserFontEntry* ufe =
|
|
static_cast<gfxUserFontEntry*>(mFonts[i].FontEntry());
|
|
bool inRange = ufe->CharacterInUnicodeRange(aCh);
|
|
if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
|
|
inRange && !FontLoadingForFamily(ff.Family(), aCh)) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
if (ufe->LoadState() != gfxUserFontEntry::STATUS_LOADED ||
|
|
!inRange) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
font = GetFontAt(i, aCh);
|
|
if (font) {
|
|
if (aGeneric) {
|
|
*aGeneric = mFonts[i].Generic();
|
|
}
|
|
return font;
|
|
}
|
|
}
|
|
if (aGeneric) {
|
|
*aGeneric = eFamily_none;
|
|
}
|
|
return GetDefaultFont();
|
|
}
|
|
|
|
gfxFont *
|
|
gfxFontGroup::GetFirstMathFont()
|
|
{
|
|
uint32_t count = mFonts.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
gfxFont* font = GetFontAt(i);
|
|
if (font && font->TryGetMathTable()) {
|
|
return font;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
gfxFontGroup *
|
|
gfxFontGroup::Copy(const gfxFontStyle *aStyle)
|
|
{
|
|
gfxFontGroup *fg =
|
|
new gfxFontGroup(mFamilyList, aStyle, mTextPerf,
|
|
mUserFontSet, mDevToCssSize);
|
|
return fg;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
gfxFont *font = GetFirstValidFont();
|
|
if (MOZ_UNLIKELY(GetStyle()->size == 0) ||
|
|
MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
|
|
// 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, gfxTextRange::MatchType::kFontGroup, 0,
|
|
false, orientation);
|
|
}
|
|
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.
|
|
gfxTextRange::MatchType matchType;
|
|
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();
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun>
|
|
gfxFontGroup::MakeBlankTextRun(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;
|
|
}
|
|
textRun->AddGlyphRun(GetFirstValidFont(),
|
|
gfxTextRange::MatchType::kFontGroup, 0, false,
|
|
orientation);
|
|
return textRun.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun>
|
|
gfxFontGroup::MakeHyphenTextRun(DrawTarget* aDrawTarget,
|
|
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;
|
|
gfxFont *font = GetFirstValidFont(uint32_t(hyphen));
|
|
if (font->HasCharacter(hyphen)) {
|
|
return MakeTextRun(&hyphen, 1, aDrawTarget, aAppUnitsPerDevUnit,
|
|
ShapedTextFlags(),
|
|
nsTextFrameUtils::Flags(), nullptr);
|
|
}
|
|
|
|
static const uint8_t dash = '-';
|
|
return MakeTextRun(&dash, 1, aDrawTarget, aAppUnitsPerDevUnit,
|
|
ShapedTextFlags(),
|
|
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->GetAppUnitsPerDevUnit()));
|
|
mHyphenWidth = hyphRun.get() ? hyphRun->GetAdvanceWidth() : 0;
|
|
}
|
|
}
|
|
return mHyphenWidth;
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun>
|
|
gfxFontGroup::MakeTextRun(const uint8_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);
|
|
}
|
|
|
|
aFlags |= ShapedTextFlags::TEXT_IS_8BIT;
|
|
|
|
if (MOZ_UNLIKELY(GetStyle()->size == 0) ||
|
|
MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
|
|
// 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(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();
|
|
}
|
|
|
|
already_AddRefed<gfxTextRun>
|
|
gfxFontGroup::MakeTextRun(const char16_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 (MOZ_UNLIKELY(GetStyle()->size == 0) ||
|
|
MOZ_UNLIKELY(GetStyle()->sizeAdjust == 0.0f)) {
|
|
return MakeBlankTextRun(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();
|
|
}
|
|
|
|
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
|
|
int32_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 (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;
|
|
|
|
if (sizeof(T) == sizeof(uint8_t) && !transformedString) {
|
|
|
|
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
|
|
nsAutoCString lang;
|
|
mStyle.language->ToUTF8String(lang);
|
|
nsAutoString families;
|
|
mFamilyList.ToString(families);
|
|
nsAutoCString str((const char*)aString, aLength);
|
|
nsAutoString styleString;
|
|
nsStyleUtil::AppendFontSlantStyle(mStyle.style, styleString);
|
|
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"),
|
|
NS_ConvertUTF16toUTF8(families).get(),
|
|
(mFamilyList.GetDefaultFontType() == eFamily_serif ?
|
|
"serif" :
|
|
(mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
|
|
"sans-serif" : "none")),
|
|
lang.get(), static_cast<int>(Script::LATIN), aLength,
|
|
mStyle.weight.ToFloat(),
|
|
mStyle.stretch.Percentage(),
|
|
NS_ConvertUTF16toUTF8(styleString).get(),
|
|
mStyle.size,
|
|
sizeof(T),
|
|
str.get()));
|
|
}
|
|
|
|
// the text is still purely 8-bit; bypass the script-run itemizer
|
|
// and treat it as a single Latin run
|
|
InitScriptRun(aDrawTarget, aTextRun, aString,
|
|
0, aLength, Script::LATIN, aMFR);
|
|
} else {
|
|
const char16_t *textPtr;
|
|
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);
|
|
}
|
|
|
|
// split into script runs so that script can potentially influence
|
|
// the font matching process below
|
|
gfxScriptItemizer scriptRuns(textPtr, aLength);
|
|
|
|
uint32_t runStart = 0, runLimit = aLength;
|
|
Script runScript = Script::LATIN;
|
|
while (scriptRuns.Next(runStart, runLimit, runScript)) {
|
|
|
|
if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Warning))) {
|
|
nsAutoCString lang;
|
|
mStyle.language->ToUTF8String(lang);
|
|
nsAutoString families;
|
|
mFamilyList.ToString(families);
|
|
nsAutoString styleString;
|
|
nsStyleUtil::AppendFontSlantStyle(mStyle.style, styleString);
|
|
uint32_t runLen = runLimit - runStart;
|
|
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"),
|
|
NS_ConvertUTF16toUTF8(families).get(),
|
|
(mFamilyList.GetDefaultFontType() == eFamily_serif ?
|
|
"serif" :
|
|
(mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
|
|
"sans-serif" : "none")),
|
|
lang.get(), static_cast<int>(runScript), runLen,
|
|
mStyle.weight.ToFloat(),
|
|
mStyle.stretch.Percentage(),
|
|
NS_ConvertUTF16toUTF8(styleString).get(),
|
|
mStyle.size,
|
|
sizeof(T),
|
|
NS_ConvertUTF16toUTF8(textPtr + runStart, runLen).get()));
|
|
}
|
|
|
|
InitScriptRun(aDrawTarget, aTextRun, textPtr + runStart,
|
|
runStart, runLimit - runStart, runScript, 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();
|
|
|
|
aTextRun->SortGlyphRuns();
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
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<gfxTextRange,3> fontRanges;
|
|
ComputeRanges(fontRanges, aString, aLength, aRunScript, orientation);
|
|
uint32_t numRanges = fontRanges.Length();
|
|
bool missingChars = false;
|
|
|
|
for (uint32_t r = 0; r < numRanges; r++) {
|
|
const gfxTextRange& range = fontRanges[r];
|
|
uint32_t matchedLength = range.Length();
|
|
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);
|
|
if (!matchedFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
|
|
aString + runStart,
|
|
aOffset + runStart,
|
|
matchedLength,
|
|
aRunScript,
|
|
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 &&
|
|
(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);
|
|
if (!subSuperFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
|
|
aString + runStart,
|
|
aOffset + runStart,
|
|
matchedLength,
|
|
aRunScript,
|
|
range.orientation)) {
|
|
// glyph layout failed! treat as missing glyphs
|
|
matchedFont = nullptr;
|
|
}
|
|
} else if (mStyle.variantCaps != NS_FONT_VARIANT_CAPS_NORMAL &&
|
|
!matchedFont->SupportsVariantCaps(aRunScript,
|
|
mStyle.variantCaps,
|
|
petiteToSmallCaps,
|
|
syntheticLower,
|
|
syntheticUpper))
|
|
{
|
|
// fallback for small-caps variant glyphs
|
|
if (!matchedFont->InitFakeSmallCapsRun(aDrawTarget, aTextRun,
|
|
aString + runStart,
|
|
aOffset + runStart,
|
|
matchedLength,
|
|
range.matchType,
|
|
range.orientation,
|
|
aRunScript,
|
|
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);
|
|
if (!matchedFont->SplitAndInitTextRun(aDrawTarget, aTextRun,
|
|
aString + runStart,
|
|
aOffset + runStart,
|
|
matchedLength,
|
|
aRunScript,
|
|
range.orientation)) {
|
|
// glyph layout failed! treat as missing glyphs
|
|
matchedFont = nullptr;
|
|
}
|
|
}
|
|
} else {
|
|
aTextRun->AddGlyphRun(mainFont,
|
|
gfxTextRange::MatchType::kFontGroup,
|
|
aOffset + runStart, (matchedLength > 0),
|
|
range.orientation);
|
|
}
|
|
|
|
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 (sizeof(T) == sizeof(char16_t)) {
|
|
if (NS_IS_HIGH_SURROGATE(ch) &&
|
|
index + 1 < aLength &&
|
|
NS_IS_LOW_SURROGATE(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;
|
|
CompressedGlyph g =
|
|
CompressedGlyph::MakeComplex(true, true, 1);
|
|
aTextRun->SetGlyphs(aOffset + index,
|
|
g, &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.
|
|
gfxFont* firstFont = GetFirstValidFont(uint32_t(kEllipsisChar[0]));
|
|
nsString ellipsis = firstFont->HasCharacter(kEllipsisChar[0])
|
|
? nsDependentString(kEllipsisChar,
|
|
ArrayLength(kEllipsisChar) - 1)
|
|
: nsDependentString(kASCIIPeriodsChar,
|
|
ArrayLength(kASCIIPeriodsChar) - 1);
|
|
|
|
RefPtr<DrawTarget> refDT = aRefDrawTargetGetter.GetRefDrawTarget();
|
|
Parameters params = {
|
|
refDT, nullptr, nullptr, nullptr, 0, aAppUnitsPerDevPixel
|
|
};
|
|
mCachedEllipsisTextRun =
|
|
MakeTextRun(ellipsis.get(), 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();
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::FindFallbackFaceForChar(gfxFontFamily* aFamily, uint32_t aCh)
|
|
{
|
|
GlobalFontMatch data(aCh, mStyle);
|
|
aFamily->SearchAllFontsForChar(&data);
|
|
gfxFontEntry* fe = data.mBestMatch;
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
return fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
|
|
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];
|
|
if (!ff.IsUserFontContainer() &&
|
|
!ff.FontEntry()->IsUserFont() &&
|
|
ff.Family() &&
|
|
ff.Family()->IsBadUnderlineFamily()) {
|
|
gfxFont* font = GetFontAt(i);
|
|
if (!font) {
|
|
continue;
|
|
}
|
|
gfxFloat bad = font->GetMetrics(gfxFont::eHorizontal).
|
|
underlineOffset;
|
|
gfxFloat first =
|
|
GetFirstValidFont()->GetMetrics(gfxFont::eHorizontal).
|
|
underlineOffset;
|
|
mUnderlineOffset = std::min(first, bad);
|
|
return mUnderlineOffset;
|
|
}
|
|
}
|
|
|
|
// no bad underline fonts, use the first valid font's metric
|
|
mUnderlineOffset = GetFirstValidFont()->
|
|
GetMetrics(gfxFont::eHorizontal).underlineOffset;
|
|
}
|
|
|
|
return mUnderlineOffset;
|
|
}
|
|
|
|
#define NARROW_NO_BREAK_SPACE 0x202fu
|
|
|
|
gfxFont*
|
|
gfxFontGroup::FindFontForChar(uint32_t aCh, uint32_t aPrevCh, uint32_t aNextCh,
|
|
Script aRunScript, gfxFont *aPrevMatchedFont,
|
|
gfxTextRange::MatchType* 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) &&
|
|
aPrevMatchedFont->HasCharacter(aCh)) {
|
|
return 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) {
|
|
gfxFont* nextFont =
|
|
FindFontForChar(aNextCh, 0, 0, aRunScript, aPrevMatchedFont,
|
|
aMatchType);
|
|
if (nextFont && nextFont->HasCharacter(aCh)) {
|
|
return nextFont;
|
|
}
|
|
}
|
|
// Otherwise, treat NNBSP like a cluster extender (as above) and try
|
|
// to continue the preceding font run.
|
|
if (aPrevMatchedFont && aPrevMatchedFont->HasCharacter(aCh)) {
|
|
return aPrevMatchedFont;
|
|
}
|
|
}
|
|
|
|
// To optimize common cases, try the first font in the font-group
|
|
// before going into the more detailed checks below
|
|
uint32_t nextIndex = 0;
|
|
bool isJoinControl = gfxFontUtils::IsJoinControl(aCh);
|
|
bool wasJoinCauser = gfxFontUtils::IsJoinCauser(aPrevCh);
|
|
bool isVarSelector = gfxFontUtils::IsVarSelector(aCh);
|
|
|
|
if (!isJoinControl && !wasJoinCauser && !isVarSelector) {
|
|
gfxFont* firstFont = GetFontAt(0, aCh);
|
|
if (firstFont) {
|
|
if (firstFont->HasCharacter(aCh)) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(mFonts[0].Generic());
|
|
return firstFont;
|
|
}
|
|
|
|
gfxFont* font = nullptr;
|
|
if (mFonts[0].CheckForFallbackFaces()) {
|
|
font = FindFallbackFaceForChar(mFonts[0].Family(), aCh);
|
|
} 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].Family(), aCh);
|
|
}
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(mFonts[0].Generic());
|
|
return font;
|
|
}
|
|
}
|
|
|
|
// 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 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 aPrevMatchedFont;
|
|
}
|
|
}
|
|
}
|
|
|
|
// if this character is a variation selector,
|
|
// use the previous font regardless of whether it supports VS or not.
|
|
// otherwise the text run will be divided.
|
|
if (isVarSelector) {
|
|
if (aPrevMatchedFont) {
|
|
return aPrevMatchedFont;
|
|
}
|
|
// VS alone. it's meaningless to search different fonts
|
|
return nullptr;
|
|
}
|
|
|
|
// 1. check remaining fonts in the font group
|
|
uint32_t fontListLength = mFonts.Length();
|
|
for (uint32_t i = nextIndex; i < fontListLength; i++) {
|
|
FamilyFace& ff = mFonts[i];
|
|
if (ff.IsInvalid() || ff.IsLoading()) {
|
|
continue;
|
|
}
|
|
|
|
// if available, use already made gfxFont and check for character
|
|
gfxFont* font = ff.Font();
|
|
if (font) {
|
|
if (font->HasCharacter(aCh)) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(ff.Generic());
|
|
return font;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// don't have a gfxFont yet, test before building
|
|
gfxFontEntry *fe = ff.FontEntry();
|
|
if (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 but only if no other font in similar
|
|
// range within family is loading
|
|
if (ufe->LoadState() == gfxUserFontEntry::STATUS_NOT_LOADED &&
|
|
!FontLoadingForFamily(ff.Family(), aCh)) {
|
|
ufe->Load();
|
|
ff.CheckState(mSkipDrawing);
|
|
}
|
|
gfxFontEntry* pfe = ufe->GetPlatformFontEntry();
|
|
if (pfe && pfe->HasCharacter(aCh)) {
|
|
font = GetFontAt(i, aCh);
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(mFonts[i].Generic());
|
|
return font;
|
|
}
|
|
}
|
|
} else if (fe->HasCharacter(aCh)) {
|
|
// for normal platform fonts, after checking the cmap
|
|
// build the font via GetFontAt
|
|
font = GetFontAt(i, aCh);
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(mFonts[i].Generic());
|
|
return font;
|
|
}
|
|
}
|
|
|
|
// check other family faces if needed
|
|
if (ff.CheckForFallbackFaces()) {
|
|
NS_ASSERTION(i == 0 ? true :
|
|
!mFonts[i-1].CheckForFallbackFaces() ||
|
|
!mFonts[i-1].Family()->Name().Equals(ff.Family()->Name()),
|
|
"should only do fallback once per font family");
|
|
font = FindFallbackFaceForChar(ff.Family(), aCh);
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(ff.Generic());
|
|
return font;
|
|
}
|
|
} else {
|
|
// For platform fonts, but not user fonts, consider intra-family
|
|
// fallback to handle styles with reduced character sets (see
|
|
// also above).
|
|
fe = ff.FontEntry();
|
|
if (!fe->mIsUserFontContainer && !fe->IsUserFont()) {
|
|
font = FindFallbackFaceForChar(ff.Family(), aCh);
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(ff.Generic());
|
|
return font;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (fontListLength == 0) {
|
|
gfxFont* defaultFont = GetDefaultFont();
|
|
if (defaultFont->HasCharacter(aCh)) {
|
|
*aMatchType = gfxTextRange::MatchType::kFontGroup;
|
|
return defaultFont;
|
|
}
|
|
}
|
|
|
|
// if character is in Private Use Area, don't do matching against pref or system fonts
|
|
if ((aCh >= 0xE000 && aCh <= 0xF8FF) || (aCh >= 0xF0000 && aCh <= 0x10FFFD))
|
|
return nullptr;
|
|
|
|
// 2. search pref fonts
|
|
gfxFont* font = WhichPrefFontSupportsChar(aCh, aNextCh);
|
|
if (font) {
|
|
*aMatchType = gfxTextRange::MatchType::kPrefsFallback;
|
|
return font;
|
|
}
|
|
|
|
// 3. use fallback fonts
|
|
// -- before searching for something else check the font used for the previous character
|
|
if (aPrevMatchedFont && aPrevMatchedFont->HasCharacter(aCh)) {
|
|
*aMatchType = gfxTextRange::MatchType::kSystemFallback;
|
|
return aPrevMatchedFont;
|
|
}
|
|
|
|
// for known "space" characters, don't do a full system-fallback search;
|
|
// we'll synthesize appropriate-width spaces instead of missing-glyph boxes
|
|
if (GetGeneralCategory(aCh) ==
|
|
HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR &&
|
|
GetFirstValidFont()->SynthesizeSpaceWidth(aCh) >= 0.0)
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
// -- otherwise look for other stuff
|
|
*aMatchType = gfxTextRange::MatchType::kSystemFallback;
|
|
return WhichSystemFontSupportsChar(aCh, aNextCh, aRunScript);
|
|
}
|
|
|
|
template<typename T>
|
|
void gfxFontGroup::ComputeRanges(nsTArray<gfxTextRange>& 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 (sizeof(T) == sizeof(char16_t)) {
|
|
if (aLength > 1 && NS_IS_HIGH_SURROGATE(nextCh) &&
|
|
NS_IS_LOW_SURROGATE(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)
|
|
FontFamilyType generic = eFamily_none;
|
|
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
|
|
gfxTextRange::MatchType matchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(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 (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_HIGH_SURROGATE(nextCh) &&
|
|
NS_IS_LOW_SURROGATE(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;
|
|
}
|
|
|
|
if (ch == 0xa0) {
|
|
ch = ' ';
|
|
}
|
|
|
|
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.
|
|
if ((font = GetFontAt(0, ch)) != nullptr
|
|
&& font->HasCharacter(ch)
|
|
&& (sizeof(T) == sizeof(uint8_t)
|
|
|| (!IsClusterExtender(ch)
|
|
&& ch != NARROW_NO_BREAK_SPACE
|
|
&& !gfxFontUtils::IsJoinControl(ch)
|
|
&& !gfxFontUtils::IsJoinCauser(prevCh)
|
|
&& !gfxFontUtils::IsVarSelector(ch)))) {
|
|
matchType = gfxTextRange::MatchType::kFontGroup |
|
|
gfxTextRange::MatchType(mFonts[0].Generic());
|
|
} else {
|
|
font = FindFontForChar(ch, prevCh, nextCh, aRunScript, prevFont,
|
|
&matchType);
|
|
}
|
|
|
|
#ifndef RELEASE_OR_BETA
|
|
if (MOZ_UNLIKELY(mTextPerf)) {
|
|
if (matchType & gfxTextRange::MatchType::kPrefsFallback) {
|
|
mTextPerf->current.fallbackPrefs++;
|
|
} else if (matchType & gfxTextRange::MatchType::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.
|
|
uint32_t v = gfxHarfBuzzShaper::GetVerticalPresentationForm(ch);
|
|
orient = (!font ||
|
|
(v && font->HasCharacter(v)) ||
|
|
font->FeatureWillHandleChar(aRunScript,
|
|
HB_TAG('v','e','r','t'),
|
|
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(gfxTextRange(0, 1, font, matchType, orient));
|
|
lastRangeIndex++;
|
|
prevFont = font;
|
|
} else {
|
|
// if font or orientation has changed, make a new range...
|
|
// unless ch is a variation selector (bug 1248248)
|
|
gfxTextRange& prevRange = aRanges[lastRangeIndex];
|
|
if (prevRange.font != font ||
|
|
(prevRange.orientation != orient && !IsClusterExtender(ch))) {
|
|
// close out the previous range
|
|
prevRange.end = origI;
|
|
aRanges.AppendElement(gfxTextRange(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 = 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;
|
|
mStyle.language->ToUTF8String(lang);
|
|
nsAutoString families;
|
|
mFamilyList.ToString(families);
|
|
|
|
// collect the font matched for each range
|
|
nsAutoCString fontMatches;
|
|
for (size_t i = 0, i_end = aRanges.Length(); i < i_end; i++) {
|
|
const gfxTextRange& r = aRanges[i];
|
|
nsAutoCString matchTypes;
|
|
if (r.matchType & gfxTextRange::MatchType::kFontGroup) {
|
|
matchTypes.AppendLiteral("list");
|
|
}
|
|
if (r.matchType & gfxTextRange::MatchType::kPrefsFallback) {
|
|
if (!matchTypes.IsEmpty()) {
|
|
matchTypes.AppendLiteral(",");
|
|
}
|
|
matchTypes.AppendLiteral("prefs");
|
|
}
|
|
if (r.matchType & gfxTextRange::MatchType::kPrefsFallback) {
|
|
if (!matchTypes.IsEmpty()) {
|
|
matchTypes.AppendLiteral(",");
|
|
}
|
|
matchTypes.AppendLiteral("sys");
|
|
}
|
|
fontMatches.AppendPrintf(" [%u:%u] %.200s (%s)", r.start, r.end,
|
|
(r.font.get() ?
|
|
NS_ConvertUTF16toUTF8(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"),
|
|
NS_ConvertUTF16toUTF8(families).get(),
|
|
(mFamilyList.GetDefaultFontType() == eFamily_serif ?
|
|
"serif" :
|
|
(mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
|
|
"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()
|
|
{
|
|
if (!mUserFontSet)
|
|
return 0;
|
|
return mUserFontSet->GetGeneration();
|
|
}
|
|
|
|
uint64_t
|
|
gfxFontGroup::GetRebuildGeneration()
|
|
{
|
|
if (!mUserFontSet)
|
|
return 0;
|
|
return mUserFontSet->GetRebuildGeneration();
|
|
}
|
|
|
|
void
|
|
gfxFontGroup::UpdateUserFonts()
|
|
{
|
|
if (mCurrGeneration < GetRebuildGeneration()) {
|
|
// fonts in userfont set changed, need to redo the fontlist
|
|
mFonts.Clear();
|
|
ClearCachedData();
|
|
BuildFontList();
|
|
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();
|
|
// search through the fonts list for a specific user font
|
|
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;
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::WhichPrefFontSupportsChar(uint32_t aCh, uint32_t aNextCh)
|
|
{
|
|
eFontPrefLang charLang;
|
|
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
|
|
|
|
EmojiPresentation emoji = GetEmojiPresentation(aCh);
|
|
if ((emoji != EmojiPresentation::TextOnly &&
|
|
(aNextCh == kVariationSelector16 ||
|
|
(emoji == EmojiPresentation::EmojiDefault &&
|
|
aNextCh != kVariationSelector15)))) {
|
|
charLang = eFontPrefLang_Emoji;
|
|
} else {
|
|
// get the pref font list if it hasn't been set up already
|
|
uint32_t unicodeRange = FindCharUnicodeRange(aCh);
|
|
charLang = pfl->GetFontPrefLangFor(unicodeRange);
|
|
}
|
|
|
|
// 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 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];
|
|
mozilla::FontFamilyType defaultGeneric =
|
|
pfl->GetDefaultGeneric(currentLang);
|
|
nsTArray<RefPtr<gfxFontFamily>>* families =
|
|
pfl->GetPrefFontsLangGroup(defaultGeneric, 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
|
|
gfxFontFamily *family = (*families)[j];
|
|
if (!family) {
|
|
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 mLastPrefFont;
|
|
}
|
|
|
|
gfxFontEntry *fe = family->FindFontForStyle(mStyle);
|
|
if (!fe) {
|
|
continue;
|
|
}
|
|
|
|
// if ch in cmap, create and return a gfxFont
|
|
if (fe->HasCharacter(aCh)) {
|
|
gfxFont* prefFont = fe->FindOrMakeFont(&mStyle);
|
|
if (!prefFont) {
|
|
continue;
|
|
}
|
|
mLastPrefFamily = family;
|
|
mLastPrefFont = prefFont;
|
|
mLastPrefLang = charLang;
|
|
mLastPrefFirstFont = (i == 0 && j == 0);
|
|
return prefFont;
|
|
}
|
|
|
|
// If the char was not available, see if we can fall back to an
|
|
// alternative face in the same family.
|
|
gfxFont* prefFont = FindFallbackFaceForChar(family, aCh);
|
|
if (prefFont) {
|
|
mLastPrefFamily = family;
|
|
mLastPrefFont = prefFont;
|
|
mLastPrefLang = charLang;
|
|
mLastPrefFirstFont = (i == 0 && j == 0);
|
|
return prefFont;
|
|
}
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
gfxFont*
|
|
gfxFontGroup::WhichSystemFontSupportsChar(uint32_t aCh, uint32_t aNextCh,
|
|
Script aRunScript)
|
|
{
|
|
gfxFontEntry *fe =
|
|
gfxPlatformFontList::PlatformFontList()->
|
|
SystemFindFontForChar(aCh, aNextCh, aRunScript, &mStyle);
|
|
if (fe) {
|
|
return fe->FindOrMakeFont(&mStyle);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
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());
|
|
}
|
|
}
|