mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 22:25:30 +00:00
1259 lines
43 KiB
C++
1259 lines
43 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "prlog.h"
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#include "gfxUserFontSet.h"
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#include "gfxPlatform.h"
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#include "nsUnicharUtils.h"
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#include "nsNetUtil.h"
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#include "nsIJARChannel.h"
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#include "nsIProtocolHandler.h"
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#include "nsIPrincipal.h"
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#include "nsIZipReader.h"
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#include "gfxFontConstants.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Services.h"
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#include "mozilla/gfx/2D.h"
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#include "gfxPlatformFontList.h"
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#include "opentype-sanitiser.h"
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#include "ots-memory-stream.h"
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using namespace mozilla;
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PRLogModuleInfo*
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gfxUserFontSet::GetUserFontsLog()
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{
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static PRLogModuleInfo* sLog;
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if (!sLog)
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sLog = PR_NewLogModule("userfonts");
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return sLog;
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}
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#define LOG(args) PR_LOG(gfxUserFontSet::GetUserFontsLog(), PR_LOG_DEBUG, args)
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#define LOG_ENABLED() PR_LOG_TEST(gfxUserFontSet::GetUserFontsLog(), PR_LOG_DEBUG)
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static uint64_t sFontSetGeneration = 0;
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// Based on ots::ExpandingMemoryStream from ots-memory-stream.h,
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// adapted to use Mozilla allocators and to allow the final
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// memory buffer to be adopted by the client.
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class ExpandingMemoryStream : public ots::OTSStream {
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public:
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ExpandingMemoryStream(size_t initial, size_t limit)
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: mLength(initial), mLimit(limit), mOff(0) {
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mPtr = moz_xmalloc(mLength);
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}
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~ExpandingMemoryStream() {
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free(mPtr);
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}
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// return the buffer, and give up ownership of it
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// so the caller becomes responsible to call free
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// when finished with it
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void* forget() {
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void* p = mPtr;
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mPtr = nullptr;
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return p;
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}
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bool WriteRaw(const void* data, size_t length) {
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if ((mOff + length > mLength) ||
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(mLength > std::numeric_limits<size_t>::max() - mOff)) {
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if (mLength == mLimit) {
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return false;
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}
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size_t newLength = (mLength + 1) * 2;
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if (newLength < mLength) {
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return false;
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}
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if (newLength > mLimit) {
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newLength = mLimit;
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}
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mPtr = moz_xrealloc(mPtr, newLength);
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mLength = newLength;
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return WriteRaw(data, length);
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}
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std::memcpy(static_cast<char*>(mPtr) + mOff, data, length);
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mOff += length;
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return true;
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}
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bool Seek(off_t position) {
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if (position < 0) {
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return false;
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}
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if (static_cast<size_t>(position) > mLength) {
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return false;
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}
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mOff = position;
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return true;
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}
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off_t Tell() const {
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return mOff;
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}
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private:
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void* mPtr;
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size_t mLength;
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const size_t mLimit;
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off_t mOff;
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};
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gfxUserFontEntry::gfxUserFontEntry(gfxUserFontSet* aFontSet,
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const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
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uint32_t aWeight,
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int32_t aStretch,
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uint32_t aItalicStyle,
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const nsTArray<gfxFontFeature>& aFeatureSettings,
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uint32_t aLanguageOverride,
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gfxSparseBitSet* aUnicodeRanges)
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: gfxFontEntry(NS_LITERAL_STRING("userfont")),
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mUserFontLoadState(STATUS_NOT_LOADED),
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mFontDataLoadingState(NOT_LOADING),
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mUnsupportedFormat(false),
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mLoader(nullptr),
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mFontSet(aFontSet)
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{
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MOZ_ASSERT(aWeight != 0,
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"aWeight must not be 0; use NS_FONT_WEIGHT_NORMAL instead");
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mIsUserFontContainer = true;
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mSrcList = aFontFaceSrcList;
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mSrcIndex = 0;
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mWeight = aWeight;
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mStretch = aStretch;
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// XXX Currently, we don't distinguish 'italic' and 'oblique' styles;
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// we need to fix this. (Bug 543715)
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mItalic = (aItalicStyle & (NS_FONT_STYLE_ITALIC | NS_FONT_STYLE_OBLIQUE)) != 0;
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mFeatureSettings.AppendElements(aFeatureSettings);
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mLanguageOverride = aLanguageOverride;
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if (aUnicodeRanges &&
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Preferences::GetBool("layout.css.unicode-range.enabled")) {
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mCharacterMap = new gfxCharacterMap(*aUnicodeRanges);
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}
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}
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gfxUserFontEntry::~gfxUserFontEntry()
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{
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}
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bool
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gfxUserFontEntry::Matches(const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
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uint32_t aWeight,
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int32_t aStretch,
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uint32_t aItalicStyle,
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const nsTArray<gfxFontFeature>& aFeatureSettings,
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uint32_t aLanguageOverride,
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gfxSparseBitSet* aUnicodeRanges)
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{
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// XXX font entries don't distinguish italic from oblique (bug 543715)
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bool isItalic =
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(aItalicStyle & (NS_FONT_STYLE_ITALIC | NS_FONT_STYLE_OBLIQUE)) != 0;
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return mWeight == aWeight &&
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mStretch == aStretch &&
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mItalic == isItalic &&
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mFeatureSettings == aFeatureSettings &&
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mLanguageOverride == aLanguageOverride &&
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mSrcList == aFontFaceSrcList &&
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((!aUnicodeRanges && !mCharacterMap) ||
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(aUnicodeRanges && mCharacterMap && mCharacterMap->Equals(aUnicodeRanges)));
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}
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gfxFont*
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gfxUserFontEntry::CreateFontInstance(const gfxFontStyle* aFontStyle, bool aNeedsBold)
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{
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NS_NOTREACHED("should only be creating a gfxFont"
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" with an actual platform font entry");
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// userfont entry is a container, can't create font from the container
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return nullptr;
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}
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class gfxOTSContext : public ots::OTSContext {
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public:
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explicit gfxOTSContext(gfxUserFontEntry* aUserFontEntry)
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: mUserFontEntry(aUserFontEntry) {}
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virtual ots::TableAction GetTableAction(uint32_t aTag) override {
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// preserve Graphite, color glyph and SVG tables
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if (aTag == TRUETYPE_TAG('S', 'i', 'l', 'f') ||
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aTag == TRUETYPE_TAG('S', 'i', 'l', 'l') ||
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aTag == TRUETYPE_TAG('G', 'l', 'o', 'c') ||
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aTag == TRUETYPE_TAG('G', 'l', 'a', 't') ||
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aTag == TRUETYPE_TAG('F', 'e', 'a', 't') ||
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aTag == TRUETYPE_TAG('S', 'V', 'G', ' ') ||
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aTag == TRUETYPE_TAG('C', 'O', 'L', 'R') ||
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aTag == TRUETYPE_TAG('C', 'P', 'A', 'L')) {
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return ots::TABLE_ACTION_PASSTHRU;
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}
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return ots::TABLE_ACTION_DEFAULT;
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}
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virtual void Message(int level, const char* format,
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...) MSGFUNC_FMT_ATTR override {
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va_list va;
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va_start(va, format);
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nsCString msg;
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msg.AppendPrintf(format, va);
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va_end(va);
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if (level > 0) {
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// For warnings (rather than errors that cause the font to fail),
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// we only report the first instance of any given message.
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if (mWarningsIssued.Contains(msg)) {
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return;
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}
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mWarningsIssued.PutEntry(msg);
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}
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mUserFontEntry->mFontSet->LogMessage(mUserFontEntry, msg.get());
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}
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private:
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gfxUserFontEntry* mUserFontEntry;
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nsTHashtable<nsCStringHashKey> mWarningsIssued;
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};
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// Call the OTS library to sanitize an sfnt before attempting to use it.
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// Returns a newly-allocated block, or nullptr in case of fatal errors.
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const uint8_t*
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gfxUserFontEntry::SanitizeOpenTypeData(const uint8_t* aData,
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uint32_t aLength,
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uint32_t& aSaneLength,
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gfxUserFontType aFontType)
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{
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if (aFontType == GFX_USERFONT_UNKNOWN) {
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aSaneLength = 0;
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return nullptr;
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}
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uint32_t lengthHint = aLength;
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if (aFontType == GFX_USERFONT_WOFF) {
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lengthHint *= 2;
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} else if (aFontType == GFX_USERFONT_WOFF2) {
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lengthHint *= 3;
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}
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// limit output/expansion to 256MB
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ExpandingMemoryStream output(lengthHint, 1024 * 1024 * 256);
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gfxOTSContext otsContext(this);
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if (otsContext.Process(&output, aData, aLength)) {
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aSaneLength = output.Tell();
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return static_cast<uint8_t*>(output.forget());
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} else {
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aSaneLength = 0;
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return nullptr;
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}
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}
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void
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gfxUserFontEntry::StoreUserFontData(gfxFontEntry* aFontEntry,
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bool aPrivate,
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const nsAString& aOriginalName,
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FallibleTArray<uint8_t>* aMetadata,
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uint32_t aMetaOrigLen,
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uint8_t aCompression)
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{
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if (!aFontEntry->mUserFontData) {
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aFontEntry->mUserFontData = new gfxUserFontData;
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}
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gfxUserFontData* userFontData = aFontEntry->mUserFontData;
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userFontData->mSrcIndex = mSrcIndex;
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const gfxFontFaceSrc& src = mSrcList[mSrcIndex];
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switch (src.mSourceType) {
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case gfxFontFaceSrc::eSourceType_Local:
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userFontData->mLocalName = src.mLocalName;
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break;
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case gfxFontFaceSrc::eSourceType_URL:
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userFontData->mURI = src.mURI;
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userFontData->mPrincipal = mPrincipal;
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break;
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case gfxFontFaceSrc::eSourceType_Buffer:
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userFontData->mIsBuffer = true;
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break;
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}
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userFontData->mPrivate = aPrivate;
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userFontData->mFormat = src.mFormatFlags;
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userFontData->mRealName = aOriginalName;
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if (aMetadata) {
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userFontData->mMetadata.SwapElements(*aMetadata);
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userFontData->mMetaOrigLen = aMetaOrigLen;
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userFontData->mCompression = aCompression;
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}
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}
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void
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gfxUserFontEntry::GetFamilyNameAndURIForLogging(nsACString& aFamilyName,
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nsACString& aURI)
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{
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aFamilyName.Assign(NS_ConvertUTF16toUTF8(mFamilyName));
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aURI.Truncate();
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if (mSrcIndex == mSrcList.Length()) {
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aURI.AppendLiteral("(end of source list)");
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} else {
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if (mSrcList[mSrcIndex].mURI) {
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mSrcList[mSrcIndex].mURI->GetSpec(aURI);
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} else {
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aURI.AppendLiteral("(invalid URI)");
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}
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}
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}
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struct WOFFHeader {
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AutoSwap_PRUint32 signature;
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AutoSwap_PRUint32 flavor;
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AutoSwap_PRUint32 length;
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AutoSwap_PRUint16 numTables;
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AutoSwap_PRUint16 reserved;
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AutoSwap_PRUint32 totalSfntSize;
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AutoSwap_PRUint16 majorVersion;
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AutoSwap_PRUint16 minorVersion;
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AutoSwap_PRUint32 metaOffset;
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AutoSwap_PRUint32 metaCompLen;
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AutoSwap_PRUint32 metaOrigLen;
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AutoSwap_PRUint32 privOffset;
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AutoSwap_PRUint32 privLen;
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};
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struct WOFF2Header {
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AutoSwap_PRUint32 signature;
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AutoSwap_PRUint32 flavor;
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AutoSwap_PRUint32 length;
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AutoSwap_PRUint16 numTables;
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AutoSwap_PRUint16 reserved;
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AutoSwap_PRUint32 totalSfntSize;
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AutoSwap_PRUint32 totalCompressedSize;
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AutoSwap_PRUint16 majorVersion;
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AutoSwap_PRUint16 minorVersion;
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AutoSwap_PRUint32 metaOffset;
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AutoSwap_PRUint32 metaCompLen;
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AutoSwap_PRUint32 metaOrigLen;
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AutoSwap_PRUint32 privOffset;
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AutoSwap_PRUint32 privLen;
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};
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template<typename HeaderT>
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void
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CopyWOFFMetadata(const uint8_t* aFontData,
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uint32_t aLength,
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FallibleTArray<uint8_t>* aMetadata,
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uint32_t* aMetaOrigLen)
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{
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// This function may be called with arbitrary, unvalidated "font" data
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// from @font-face, so it needs to be careful to bounds-check, etc.,
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// before trying to read anything.
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// This just saves a copy of the compressed data block; it does NOT check
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// that the block can be successfully decompressed, or that it contains
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// well-formed/valid XML metadata.
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if (aLength < sizeof(HeaderT)) {
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return;
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}
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const HeaderT* woff =
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reinterpret_cast<const HeaderT*>(aFontData);
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uint32_t metaOffset = woff->metaOffset;
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uint32_t metaCompLen = woff->metaCompLen;
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if (!metaOffset || !metaCompLen || !woff->metaOrigLen) {
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return;
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}
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if (metaOffset >= aLength || metaCompLen > aLength - metaOffset) {
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return;
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}
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if (!aMetadata->SetLength(woff->metaCompLen)) {
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return;
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}
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memcpy(aMetadata->Elements(), aFontData + metaOffset, metaCompLen);
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*aMetaOrigLen = woff->metaOrigLen;
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}
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void
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gfxUserFontEntry::LoadNextSrc()
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{
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uint32_t numSrc = mSrcList.Length();
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NS_ASSERTION(mSrcIndex < numSrc,
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"already at the end of the src list for user font");
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NS_ASSERTION((mUserFontLoadState == STATUS_NOT_LOADED ||
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mUserFontLoadState == STATUS_LOADING) &&
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mFontDataLoadingState < LOADING_FAILED,
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"attempting to load a font that has either completed or failed");
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if (mUserFontLoadState == STATUS_NOT_LOADED) {
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SetLoadState(STATUS_LOADING);
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mFontDataLoadingState = LOADING_STARTED;
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mUnsupportedFormat = false;
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} else {
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// we were already loading; move to the next source,
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// but don't reset state - if we've already timed out,
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// that counts against the new download
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mSrcIndex++;
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}
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// load each src entry in turn, until a local face is found
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// or a download begins successfully
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while (mSrcIndex < numSrc) {
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gfxFontFaceSrc& currSrc = mSrcList[mSrcIndex];
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// src local ==> lookup and load immediately
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if (currSrc.mSourceType == gfxFontFaceSrc::eSourceType_Local) {
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gfxFontEntry* fe =
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gfxPlatform::GetPlatform()->LookupLocalFont(currSrc.mLocalName,
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mWeight,
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mStretch,
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mItalic);
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mFontSet->SetLocalRulesUsed();
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if (fe) {
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LOG(("userfonts (%p) [src %d] loaded local: (%s) for (%s) gen: %8.8x\n",
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mFontSet, mSrcIndex,
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NS_ConvertUTF16toUTF8(currSrc.mLocalName).get(),
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NS_ConvertUTF16toUTF8(mFamilyName).get(),
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uint32_t(mFontSet->mGeneration)));
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fe->mFeatureSettings.AppendElements(mFeatureSettings);
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fe->mLanguageOverride = mLanguageOverride;
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fe->mFamilyName = mFamilyName;
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// For src:local(), we don't care whether the request is from
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// a private window as there's no issue of caching resources;
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// local fonts are just available all the time.
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StoreUserFontData(fe, false, nsString(), nullptr, 0,
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gfxUserFontData::kUnknownCompression);
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mPlatformFontEntry = fe;
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SetLoadState(STATUS_LOADED);
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return;
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} else {
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LOG(("userfonts (%p) [src %d] failed local: (%s) for (%s)\n",
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mFontSet, mSrcIndex,
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NS_ConvertUTF16toUTF8(currSrc.mLocalName).get(),
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NS_ConvertUTF16toUTF8(mFamilyName).get()));
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}
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}
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// src url ==> start the load process
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else if (currSrc.mSourceType == gfxFontFaceSrc::eSourceType_URL) {
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if (gfxPlatform::GetPlatform()->IsFontFormatSupported(currSrc.mURI,
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currSrc.mFormatFlags)) {
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nsIPrincipal* principal = nullptr;
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bool bypassCache;
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nsresult rv = mFontSet->CheckFontLoad(&currSrc, &principal,
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&bypassCache);
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if (NS_SUCCEEDED(rv) && principal != nullptr) {
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if (!bypassCache) {
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// see if we have an existing entry for this source
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gfxFontEntry* fe = gfxUserFontSet::
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UserFontCache::GetFont(currSrc.mURI,
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principal,
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this,
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mFontSet->GetPrivateBrowsing());
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if (fe) {
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mPlatformFontEntry = fe;
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SetLoadState(STATUS_LOADED);
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return;
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}
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}
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// record the principal returned by CheckFontLoad,
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// for use when creating a channel
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// and when caching the loaded entry
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mPrincipal = principal;
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bool loadDoesntSpin = false;
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rv = NS_URIChainHasFlags(currSrc.mURI,
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nsIProtocolHandler::URI_SYNC_LOAD_IS_OK,
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&loadDoesntSpin);
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if (NS_SUCCEEDED(rv) && loadDoesntSpin) {
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uint8_t* buffer = nullptr;
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uint32_t bufferLength = 0;
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// sync load font immediately
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rv = mFontSet->SyncLoadFontData(this, &currSrc, buffer,
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bufferLength);
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if (NS_SUCCEEDED(rv) &&
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LoadPlatformFont(buffer, bufferLength)) {
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SetLoadState(STATUS_LOADED);
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return;
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} else {
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mFontSet->LogMessage(this,
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"font load failed",
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nsIScriptError::errorFlag,
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rv);
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}
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} else {
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// otherwise load font async
|
|
rv = mFontSet->StartLoad(this, &currSrc);
|
|
bool loadOK = NS_SUCCEEDED(rv);
|
|
|
|
if (loadOK) {
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString fontURI;
|
|
currSrc.mURI->GetSpec(fontURI);
|
|
LOG(("userfonts (%p) [src %d] loading uri: (%s) for (%s)\n",
|
|
mFontSet, mSrcIndex, fontURI.get(),
|
|
NS_ConvertUTF16toUTF8(mFamilyName).get()));
|
|
}
|
|
return;
|
|
} else {
|
|
mFontSet->LogMessage(this,
|
|
"download failed",
|
|
nsIScriptError::errorFlag,
|
|
rv);
|
|
}
|
|
}
|
|
} else {
|
|
mFontSet->LogMessage(this, "download not allowed",
|
|
nsIScriptError::errorFlag, rv);
|
|
}
|
|
} else {
|
|
// We don't log a warning to the web console yet,
|
|
// as another source may load successfully
|
|
mUnsupportedFormat = true;
|
|
}
|
|
}
|
|
|
|
// FontFace buffer ==> load immediately
|
|
|
|
else {
|
|
MOZ_ASSERT(currSrc.mSourceType == gfxFontFaceSrc::eSourceType_Buffer);
|
|
|
|
uint8_t* buffer = nullptr;
|
|
uint32_t bufferLength = 0;
|
|
|
|
// sync load font immediately
|
|
currSrc.mBuffer->TakeBuffer(buffer, bufferLength);
|
|
if (buffer && LoadPlatformFont(buffer, bufferLength)) {
|
|
// LoadPlatformFont takes ownership of the buffer, so no need
|
|
// to free it here.
|
|
SetLoadState(STATUS_LOADED);
|
|
return;
|
|
} else {
|
|
mFontSet->LogMessage(this,
|
|
"font load failed",
|
|
nsIScriptError::errorFlag);
|
|
}
|
|
}
|
|
|
|
mSrcIndex++;
|
|
}
|
|
|
|
if (mUnsupportedFormat) {
|
|
mFontSet->LogMessage(this, "no supported format found",
|
|
nsIScriptError::warningFlag);
|
|
}
|
|
|
|
// all src's failed; mark this entry as unusable (so fallback will occur)
|
|
LOG(("userfonts (%p) failed all src for (%s)\n",
|
|
mFontSet, NS_ConvertUTF16toUTF8(mFamilyName).get()));
|
|
mFontDataLoadingState = LOADING_FAILED;
|
|
SetLoadState(STATUS_FAILED);
|
|
}
|
|
|
|
void
|
|
gfxUserFontEntry::SetLoadState(UserFontLoadState aLoadState)
|
|
{
|
|
mUserFontLoadState = aLoadState;
|
|
}
|
|
|
|
bool
|
|
gfxUserFontEntry::LoadPlatformFont(const uint8_t* aFontData, uint32_t& aLength)
|
|
{
|
|
NS_ASSERTION((mUserFontLoadState == STATUS_NOT_LOADED ||
|
|
mUserFontLoadState == STATUS_LOADING) &&
|
|
mFontDataLoadingState < LOADING_FAILED,
|
|
"attempting to load a font that has either completed or failed");
|
|
|
|
gfxFontEntry* fe = nullptr;
|
|
|
|
gfxUserFontType fontType =
|
|
gfxFontUtils::DetermineFontDataType(aFontData, aLength);
|
|
|
|
// Unwrap/decompress/sanitize or otherwise munge the downloaded data
|
|
// to make a usable sfnt structure.
|
|
|
|
// Because platform font activation code may replace the name table
|
|
// in the font with a synthetic one, we save the original name so that
|
|
// it can be reported via the nsIDOMFontFace API.
|
|
nsAutoString originalFullName;
|
|
|
|
// Call the OTS sanitizer; this will also decode WOFF to sfnt
|
|
// if necessary. The original data in aFontData is left unchanged.
|
|
uint32_t saneLen;
|
|
const uint8_t* saneData =
|
|
SanitizeOpenTypeData(aFontData, aLength, saneLen, fontType);
|
|
if (!saneData) {
|
|
mFontSet->LogMessage(this, "rejected by sanitizer");
|
|
}
|
|
if (saneData) {
|
|
// The sanitizer ensures that we have a valid sfnt and a usable
|
|
// name table, so this should never fail unless we're out of
|
|
// memory, and GetFullNameFromSFNT is not directly exposed to
|
|
// arbitrary/malicious data from the web.
|
|
gfxFontUtils::GetFullNameFromSFNT(saneData, saneLen,
|
|
originalFullName);
|
|
// Here ownership of saneData is passed to the platform,
|
|
// which will delete it when no longer required
|
|
|
|
fe = gfxPlatform::GetPlatform()->MakePlatformFont(mName,
|
|
mWeight,
|
|
mStretch,
|
|
mItalic,
|
|
saneData,
|
|
saneLen);
|
|
if (!fe) {
|
|
mFontSet->LogMessage(this, "not usable by platform");
|
|
}
|
|
}
|
|
|
|
if (fe) {
|
|
// Save a copy of the metadata block (if present) for nsIDOMFontFace
|
|
// to use if required. Ownership of the metadata block will be passed
|
|
// to the gfxUserFontData record below.
|
|
FallibleTArray<uint8_t> metadata;
|
|
uint32_t metaOrigLen = 0;
|
|
uint8_t compression = gfxUserFontData::kUnknownCompression;
|
|
if (fontType == GFX_USERFONT_WOFF) {
|
|
CopyWOFFMetadata<WOFFHeader>(aFontData, aLength,
|
|
&metadata, &metaOrigLen);
|
|
compression = gfxUserFontData::kZlibCompression;
|
|
} else if (fontType == GFX_USERFONT_WOFF2) {
|
|
CopyWOFFMetadata<WOFF2Header>(aFontData, aLength,
|
|
&metadata, &metaOrigLen);
|
|
compression = gfxUserFontData::kBrotliCompression;
|
|
}
|
|
|
|
// copy OpenType feature/language settings from the userfont entry to the
|
|
// newly-created font entry
|
|
fe->mFeatureSettings.AppendElements(mFeatureSettings);
|
|
fe->mLanguageOverride = mLanguageOverride;
|
|
fe->mFamilyName = mFamilyName;
|
|
StoreUserFontData(fe, mFontSet->GetPrivateBrowsing(), originalFullName,
|
|
&metadata, metaOrigLen, compression);
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString fontURI;
|
|
mSrcList[mSrcIndex].mURI->GetSpec(fontURI);
|
|
LOG(("userfonts (%p) [src %d] loaded uri: (%s) for (%s) (%p) gen: %8.8x\n",
|
|
mFontSet, mSrcIndex, fontURI.get(),
|
|
NS_ConvertUTF16toUTF8(mFamilyName).get(),
|
|
this,
|
|
uint32_t(mFontSet->mGeneration)));
|
|
}
|
|
mPlatformFontEntry = fe;
|
|
SetLoadState(STATUS_LOADED);
|
|
gfxUserFontSet::UserFontCache::CacheFont(fe);
|
|
} else {
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString fontURI;
|
|
mSrcList[mSrcIndex].mURI->GetSpec(fontURI);
|
|
LOG(("userfonts (%p) [src %d] failed uri: (%s) for (%s)"
|
|
" error making platform font\n",
|
|
mFontSet, mSrcIndex, fontURI.get(),
|
|
NS_ConvertUTF16toUTF8(mFamilyName).get()));
|
|
}
|
|
}
|
|
|
|
// The downloaded data can now be discarded; the font entry is using the
|
|
// sanitized copy
|
|
free((void*)aFontData);
|
|
|
|
return fe != nullptr;
|
|
}
|
|
|
|
void
|
|
gfxUserFontEntry::Load()
|
|
{
|
|
if (mUserFontLoadState == STATUS_NOT_LOADED) {
|
|
LoadNextSrc();
|
|
}
|
|
}
|
|
|
|
// This is called when a font download finishes.
|
|
// Ownership of aFontData passes in here, and the font set must
|
|
// ensure that it is eventually deleted via free().
|
|
bool
|
|
gfxUserFontEntry::FontDataDownloadComplete(const uint8_t* aFontData,
|
|
uint32_t aLength,
|
|
nsresult aDownloadStatus)
|
|
{
|
|
// forget about the loader, as we no longer potentially need to cancel it
|
|
// if the entry is obsoleted
|
|
mLoader = nullptr;
|
|
|
|
// download successful, make platform font using font data
|
|
if (NS_SUCCEEDED(aDownloadStatus)) {
|
|
bool loaded = LoadPlatformFont(aFontData, aLength);
|
|
aFontData = nullptr;
|
|
|
|
if (loaded) {
|
|
mFontSet->IncrementGeneration();
|
|
return true;
|
|
}
|
|
|
|
} else {
|
|
// download failed
|
|
mFontSet->LogMessage(this,
|
|
"download failed", nsIScriptError::errorFlag,
|
|
aDownloadStatus);
|
|
}
|
|
|
|
if (aFontData) {
|
|
free((void*)aFontData);
|
|
}
|
|
|
|
// error occurred, load next src
|
|
LoadNextSrc();
|
|
|
|
// We ignore the status returned by LoadNext();
|
|
// even if loading failed, we need to bump the font-set generation
|
|
// and return true in order to trigger reflow, so that fallback
|
|
// will be used where the text was "masked" by the pending download
|
|
mFontSet->IncrementGeneration();
|
|
return true;
|
|
}
|
|
|
|
gfxUserFontSet::gfxUserFontSet()
|
|
: mFontFamilies(4), mLocalRulesUsed(false)
|
|
{
|
|
IncrementGeneration(true);
|
|
gfxPlatformFontList* fp = gfxPlatformFontList::PlatformFontList();
|
|
if (fp) {
|
|
fp->AddUserFontSet(this);
|
|
}
|
|
}
|
|
|
|
gfxUserFontSet::~gfxUserFontSet()
|
|
{
|
|
gfxPlatformFontList* fp = gfxPlatformFontList::PlatformFontList();
|
|
if (fp) {
|
|
fp->RemoveUserFontSet(this);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<gfxUserFontEntry>
|
|
gfxUserFontSet::FindOrCreateUserFontEntry(
|
|
const nsAString& aFamilyName,
|
|
const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
uint32_t aWeight,
|
|
int32_t aStretch,
|
|
uint32_t aItalicStyle,
|
|
const nsTArray<gfxFontFeature>& aFeatureSettings,
|
|
uint32_t aLanguageOverride,
|
|
gfxSparseBitSet* aUnicodeRanges)
|
|
{
|
|
nsRefPtr<gfxUserFontEntry> entry;
|
|
|
|
// If there's already a userfont entry in the family whose descriptors all match,
|
|
// we can just move it to the end of the list instead of adding a new
|
|
// face that will always "shadow" the old one.
|
|
// Note that we can't do this for platform font entries, even if the
|
|
// style descriptors match, as they might have had a different source list,
|
|
// but we no longer have the old source list available to check.
|
|
gfxUserFontFamily* family = LookupFamily(aFamilyName);
|
|
if (family) {
|
|
entry = FindExistingUserFontEntry(family, aFontFaceSrcList, aWeight,
|
|
aStretch, aItalicStyle,
|
|
aFeatureSettings, aLanguageOverride,
|
|
aUnicodeRanges);
|
|
}
|
|
|
|
if (!entry) {
|
|
entry = CreateUserFontEntry(aFontFaceSrcList, aWeight, aStretch,
|
|
aItalicStyle, aFeatureSettings,
|
|
aLanguageOverride, aUnicodeRanges);
|
|
entry->mFamilyName = aFamilyName;
|
|
}
|
|
|
|
return entry.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxUserFontEntry>
|
|
gfxUserFontSet::CreateUserFontEntry(
|
|
const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
uint32_t aWeight,
|
|
int32_t aStretch,
|
|
uint32_t aItalicStyle,
|
|
const nsTArray<gfxFontFeature>& aFeatureSettings,
|
|
uint32_t aLanguageOverride,
|
|
gfxSparseBitSet* aUnicodeRanges)
|
|
{
|
|
|
|
nsRefPtr<gfxUserFontEntry> userFontEntry =
|
|
new gfxUserFontEntry(this, aFontFaceSrcList, aWeight,
|
|
aStretch, aItalicStyle, aFeatureSettings,
|
|
aLanguageOverride, aUnicodeRanges);
|
|
return userFontEntry.forget();
|
|
}
|
|
|
|
gfxUserFontEntry*
|
|
gfxUserFontSet::FindExistingUserFontEntry(
|
|
gfxUserFontFamily* aFamily,
|
|
const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
uint32_t aWeight,
|
|
int32_t aStretch,
|
|
uint32_t aItalicStyle,
|
|
const nsTArray<gfxFontFeature>& aFeatureSettings,
|
|
uint32_t aLanguageOverride,
|
|
gfxSparseBitSet* aUnicodeRanges)
|
|
{
|
|
MOZ_ASSERT(aWeight != 0,
|
|
"aWeight must not be 0; use NS_FONT_WEIGHT_NORMAL instead");
|
|
|
|
nsTArray<nsRefPtr<gfxFontEntry>>& fontList = aFamily->GetFontList();
|
|
|
|
for (size_t i = 0, count = fontList.Length(); i < count; i++) {
|
|
if (!fontList[i]->mIsUserFontContainer) {
|
|
continue;
|
|
}
|
|
|
|
gfxUserFontEntry* existingUserFontEntry =
|
|
static_cast<gfxUserFontEntry*>(fontList[i].get());
|
|
if (!existingUserFontEntry->Matches(aFontFaceSrcList,
|
|
aWeight, aStretch, aItalicStyle,
|
|
aFeatureSettings, aLanguageOverride,
|
|
aUnicodeRanges)) {
|
|
continue;
|
|
}
|
|
|
|
return existingUserFontEntry;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::AddUserFontEntry(const nsAString& aFamilyName,
|
|
gfxUserFontEntry* aUserFontEntry)
|
|
{
|
|
gfxUserFontFamily* family = GetFamily(aFamilyName);
|
|
family->AddFontEntry(aUserFontEntry);
|
|
|
|
if (LOG_ENABLED()) {
|
|
LOG(("userfonts (%p) added to \"%s\" (%p) style: %s weight: %d "
|
|
"stretch: %d",
|
|
this, NS_ConvertUTF16toUTF8(aFamilyName).get(), aUserFontEntry,
|
|
(aUserFontEntry->IsItalic() ? "italic" : "normal"),
|
|
aUserFontEntry->Weight(), aUserFontEntry->Stretch()));
|
|
}
|
|
}
|
|
|
|
gfxUserFontEntry*
|
|
gfxUserFontSet::FindUserFontEntryAndLoad(gfxFontFamily* aFamily,
|
|
const gfxFontStyle& aFontStyle,
|
|
bool& aNeedsBold,
|
|
bool& aWaitForUserFont)
|
|
{
|
|
aWaitForUserFont = false;
|
|
gfxFontEntry* fe = aFamily->FindFontForStyle(aFontStyle, aNeedsBold);
|
|
NS_ASSERTION(!fe || fe->mIsUserFontContainer,
|
|
"should only have userfont entries in userfont families");
|
|
if (!fe) {
|
|
return nullptr;
|
|
}
|
|
|
|
gfxUserFontEntry* userFontEntry = static_cast<gfxUserFontEntry*>(fe);
|
|
|
|
// start the load if it hasn't been loaded
|
|
userFontEntry->Load();
|
|
if (userFontEntry->GetPlatformFontEntry()) {
|
|
return userFontEntry;
|
|
}
|
|
|
|
aWaitForUserFont = userFontEntry->WaitForUserFont();
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::IncrementGeneration(bool aIsRebuild)
|
|
{
|
|
// add one, increment again if zero
|
|
++sFontSetGeneration;
|
|
if (sFontSetGeneration == 0)
|
|
++sFontSetGeneration;
|
|
mGeneration = sFontSetGeneration;
|
|
if (aIsRebuild) {
|
|
mRebuildGeneration = mGeneration;
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::RebuildLocalRules()
|
|
{
|
|
if (mLocalRulesUsed) {
|
|
DoRebuildUserFontSet();
|
|
}
|
|
}
|
|
|
|
gfxUserFontFamily*
|
|
gfxUserFontSet::LookupFamily(const nsAString& aFamilyName) const
|
|
{
|
|
nsAutoString key(aFamilyName);
|
|
ToLowerCase(key);
|
|
|
|
return mFontFamilies.GetWeak(key);
|
|
}
|
|
|
|
bool
|
|
gfxUserFontSet::ContainsUserFontSetFonts(const FontFamilyList& aFontList) const
|
|
{
|
|
for (const FontFamilyName& name : aFontList.GetFontlist()) {
|
|
if (name.mType != eFamily_named &&
|
|
name.mType != eFamily_named_quoted) {
|
|
continue;
|
|
}
|
|
if (LookupFamily(name.mName)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
gfxUserFontFamily*
|
|
gfxUserFontSet::GetFamily(const nsAString& aFamilyName)
|
|
{
|
|
nsAutoString key(aFamilyName);
|
|
ToLowerCase(key);
|
|
|
|
gfxUserFontFamily* family = mFontFamilies.GetWeak(key);
|
|
if (!family) {
|
|
family = new gfxUserFontFamily(aFamilyName);
|
|
mFontFamilies.Put(key, family);
|
|
}
|
|
return family;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// gfxUserFontSet::UserFontCache - re-use platform font entries for user fonts
|
|
// across pages/fontsets rather than instantiating new platform fonts.
|
|
//
|
|
// Entries are added to this cache when a platform font is instantiated from
|
|
// downloaded data, and removed when the platform font entry is destroyed.
|
|
// We don't need to use a timed expiration scheme here because the gfxFontEntry
|
|
// for a downloaded font will be kept alive by its corresponding gfxFont
|
|
// instance(s) until they are deleted, and *that* happens using an expiration
|
|
// tracker (gfxFontCache). The result is that the downloaded font instances
|
|
// recorded here will persist between pages and can get reused (provided the
|
|
// source URI and principal match, of course).
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
nsTHashtable<gfxUserFontSet::UserFontCache::Entry>*
|
|
gfxUserFontSet::UserFontCache::sUserFonts = nullptr;
|
|
|
|
NS_IMPL_ISUPPORTS(gfxUserFontSet::UserFontCache::Flusher, nsIObserver)
|
|
|
|
PLDHashOperator
|
|
gfxUserFontSet::UserFontCache::Entry::RemoveUnlessPersistent(Entry* aEntry,
|
|
void* aUserData)
|
|
{
|
|
return aEntry->mPersistence == kPersistent ? PL_DHASH_NEXT :
|
|
PL_DHASH_REMOVE;
|
|
}
|
|
|
|
PLDHashOperator
|
|
gfxUserFontSet::UserFontCache::Entry::RemoveIfPrivate(Entry* aEntry,
|
|
void* aUserData)
|
|
{
|
|
return aEntry->mPrivate ? PL_DHASH_REMOVE : PL_DHASH_NEXT;
|
|
}
|
|
|
|
PLDHashOperator
|
|
gfxUserFontSet::UserFontCache::Entry::RemoveIfMatches(Entry* aEntry,
|
|
void* aUserData)
|
|
{
|
|
return aEntry->GetFontEntry() == static_cast<gfxFontEntry*>(aUserData) ?
|
|
PL_DHASH_REMOVE : PL_DHASH_NEXT;
|
|
}
|
|
|
|
PLDHashOperator
|
|
gfxUserFontSet::UserFontCache::Entry::DisconnectSVG(Entry* aEntry,
|
|
void* aUserData)
|
|
{
|
|
aEntry->GetFontEntry()->DisconnectSVG();
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
gfxUserFontSet::UserFontCache::Flusher::Observe(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* aData)
|
|
{
|
|
if (!sUserFonts) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!strcmp(aTopic, "cacheservice:empty-cache")) {
|
|
sUserFonts->EnumerateEntries(Entry::RemoveUnlessPersistent, nullptr);
|
|
} else if (!strcmp(aTopic, "last-pb-context-exited")) {
|
|
sUserFonts->EnumerateEntries(Entry::RemoveIfPrivate, nullptr);
|
|
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
|
|
sUserFonts->EnumerateEntries(Entry::DisconnectSVG, nullptr);
|
|
} else {
|
|
NS_NOTREACHED("unexpected topic");
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static bool
|
|
IgnorePrincipal(nsIURI* aURI)
|
|
{
|
|
nsresult rv;
|
|
bool inherits = false;
|
|
rv = NS_URIChainHasFlags(aURI,
|
|
nsIProtocolHandler::URI_INHERITS_SECURITY_CONTEXT,
|
|
&inherits);
|
|
return NS_SUCCEEDED(rv) && inherits;
|
|
}
|
|
|
|
bool
|
|
gfxUserFontSet::UserFontCache::Entry::KeyEquals(const KeyTypePointer aKey) const
|
|
{
|
|
const gfxFontEntry* fe = aKey->mFontEntry;
|
|
// CRC32 checking mode
|
|
if (mLength || aKey->mLength) {
|
|
if (aKey->mLength != mLength ||
|
|
aKey->mCRC32 != mCRC32) {
|
|
return false;
|
|
}
|
|
} else {
|
|
bool result;
|
|
if (NS_FAILED(mURI->Equals(aKey->mURI, &result)) || !result) {
|
|
return false;
|
|
}
|
|
|
|
// For data: URIs, we don't care about the principal; otherwise, check it.
|
|
if (!IgnorePrincipal(mURI)) {
|
|
NS_ASSERTION(mPrincipal && aKey->mPrincipal,
|
|
"only data: URIs are allowed to omit the principal");
|
|
if (NS_FAILED(mPrincipal->Equals(aKey->mPrincipal, &result)) ||
|
|
!result) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (mPrivate != aKey->mPrivate) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (mFontEntry->mItalic != fe->mItalic ||
|
|
mFontEntry->mWeight != fe->mWeight ||
|
|
mFontEntry->mStretch != fe->mStretch ||
|
|
mFontEntry->mFeatureSettings != fe->mFeatureSettings ||
|
|
mFontEntry->mLanguageOverride != fe->mLanguageOverride ||
|
|
mFontEntry->mFamilyName != fe->mFamilyName) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::UserFontCache::CacheFont(gfxFontEntry* aFontEntry,
|
|
EntryPersistence aPersistence)
|
|
{
|
|
NS_ASSERTION(aFontEntry->mFamilyName.Length() != 0,
|
|
"caching a font associated with no family yet");
|
|
|
|
// if caching is disabled, simply return
|
|
if (Preferences::GetBool("gfx.downloadable_fonts.disable_cache")) {
|
|
return;
|
|
}
|
|
|
|
gfxUserFontData* data = aFontEntry->mUserFontData;
|
|
if (data->mIsBuffer) {
|
|
#ifdef DEBUG_USERFONT_CACHE
|
|
printf("userfontcache skipped fontentry with buffer source: %p\n",
|
|
aFontEntry);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
if (!sUserFonts) {
|
|
sUserFonts = new nsTHashtable<Entry>;
|
|
|
|
nsCOMPtr<nsIObserverService> obs =
|
|
mozilla::services::GetObserverService();
|
|
if (obs) {
|
|
Flusher* flusher = new Flusher;
|
|
obs->AddObserver(flusher, "cacheservice:empty-cache",
|
|
false);
|
|
obs->AddObserver(flusher, "last-pb-context-exited", false);
|
|
obs->AddObserver(flusher, "xpcom-shutdown", false);
|
|
}
|
|
}
|
|
|
|
if (data->mLength) {
|
|
MOZ_ASSERT(aPersistence == kPersistent);
|
|
MOZ_ASSERT(!data->mPrivate);
|
|
sUserFonts->PutEntry(Key(data->mCRC32, data->mLength, aFontEntry,
|
|
data->mPrivate, aPersistence));
|
|
} else {
|
|
MOZ_ASSERT(aPersistence == kDiscardable);
|
|
// For data: URIs, the principal is ignored; anyone who has the same
|
|
// data: URI is able to load it and get an equivalent font.
|
|
// Otherwise, the principal is used as part of the cache key.
|
|
nsIPrincipal* principal;
|
|
if (IgnorePrincipal(data->mURI)) {
|
|
principal = nullptr;
|
|
} else {
|
|
principal = data->mPrincipal;
|
|
}
|
|
sUserFonts->PutEntry(Key(data->mURI, principal, aFontEntry,
|
|
data->mPrivate, aPersistence));
|
|
}
|
|
|
|
#ifdef DEBUG_USERFONT_CACHE
|
|
printf("userfontcache added fontentry: %p\n", aFontEntry);
|
|
Dump();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::UserFontCache::ForgetFont(gfxFontEntry* aFontEntry)
|
|
{
|
|
if (!sUserFonts) {
|
|
// if we've already deleted the cache (i.e. during shutdown),
|
|
// just ignore this
|
|
return;
|
|
}
|
|
|
|
// We can't simply use RemoveEntry here because it's possible the principal
|
|
// may have changed since the font was cached, in which case the lookup
|
|
// would no longer find the entry (bug 838105).
|
|
sUserFonts->EnumerateEntries(
|
|
gfxUserFontSet::UserFontCache::Entry::RemoveIfMatches, aFontEntry);
|
|
|
|
#ifdef DEBUG_USERFONT_CACHE
|
|
printf("userfontcache removed fontentry: %p\n", aFontEntry);
|
|
Dump();
|
|
#endif
|
|
}
|
|
|
|
gfxFontEntry*
|
|
gfxUserFontSet::UserFontCache::GetFont(nsIURI* aSrcURI,
|
|
nsIPrincipal* aPrincipal,
|
|
gfxUserFontEntry* aUserFontEntry,
|
|
bool aPrivate)
|
|
{
|
|
if (!sUserFonts ||
|
|
Preferences::GetBool("gfx.downloadable_fonts.disable_cache")) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Ignore principal when looking up a data: URI.
|
|
nsIPrincipal* principal;
|
|
if (IgnorePrincipal(aSrcURI)) {
|
|
principal = nullptr;
|
|
} else {
|
|
principal = aPrincipal;
|
|
}
|
|
|
|
Entry* entry = sUserFonts->GetEntry(Key(aSrcURI, principal, aUserFontEntry,
|
|
aPrivate));
|
|
if (entry) {
|
|
return entry->GetFontEntry();
|
|
}
|
|
|
|
nsCOMPtr<nsIChannel> chan;
|
|
if (NS_FAILED(NS_NewChannel(getter_AddRefs(chan),
|
|
aSrcURI,
|
|
aPrincipal,
|
|
nsILoadInfo::SEC_NORMAL,
|
|
nsIContentPolicy::TYPE_OTHER))) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIJARChannel> jarchan = do_QueryInterface(chan);
|
|
if (!jarchan) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIZipEntry> zipentry;
|
|
if (NS_FAILED(jarchan->GetZipEntry(getter_AddRefs(zipentry)))) {
|
|
return nullptr;
|
|
}
|
|
|
|
uint32_t crc32, length;
|
|
zipentry->GetCRC32(&crc32);
|
|
zipentry->GetRealSize(&length);
|
|
|
|
entry = sUserFonts->GetEntry(Key(crc32, length, aUserFontEntry, aPrivate));
|
|
if (entry) {
|
|
return entry->GetFontEntry();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::UserFontCache::Shutdown()
|
|
{
|
|
if (sUserFonts) {
|
|
delete sUserFonts;
|
|
sUserFonts = nullptr;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_USERFONT_CACHE
|
|
|
|
PLDHashOperator
|
|
gfxUserFontSet::UserFontCache::Entry::DumpEntry(Entry* aEntry, void* aUserData)
|
|
{
|
|
nsresult rv;
|
|
|
|
nsAutoCString principalURISpec("(null)");
|
|
bool setDomain = false;
|
|
|
|
if (aEntry->mPrincipal) {
|
|
nsCOMPtr<nsIURI> principalURI;
|
|
rv = aEntry->mPrincipal->GetURI(getter_AddRefs(principalURI));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
principalURI->GetSpec(principalURISpec);
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> domainURI;
|
|
aEntry->mPrincipal->GetDomain(getter_AddRefs(domainURI));
|
|
if (domainURI) {
|
|
setDomain = true;
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(aEntry->mURI, "null URI in userfont cache entry");
|
|
|
|
printf("userfontcache fontEntry: %p fonturihash: %8.8x family: %s domainset: %s principal: [%s]\n",
|
|
aEntry->mFontEntry,
|
|
nsURIHashKey::HashKey(aEntry->mURI),
|
|
NS_ConvertUTF16toUTF8(aEntry->mFontEntry->FamilyName()).get(),
|
|
(setDomain ? "true" : "false"),
|
|
principalURISpec.get()
|
|
);
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
void
|
|
gfxUserFontSet::UserFontCache::Dump()
|
|
{
|
|
if (!sUserFonts) {
|
|
return;
|
|
}
|
|
|
|
printf("userfontcache dump count: %d ========\n", sUserFonts->Count());
|
|
sUserFonts->EnumerateEntries(Entry::DumpEntry, nullptr);
|
|
printf("userfontcache dump ==================\n");
|
|
}
|
|
|
|
#endif
|