mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 21:01:08 +00:00
ea0cd2d3b9
I haven't been able to construct a test-case without InspectorUtils either. Tried to construct a test-case with InspectorUtils, but that doesn't work either because the DOM mutation from `document.documentElement.classList = ""` (to remove `reftest-wait`) is enough to schedule a style flush (for invalidation) which ends up triggering the update. Differential Revision: https://phabricator.services.mozilla.com/D216059
804 lines
29 KiB
C++
804 lines
29 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_USER_FONT_SET_H
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#define GFX_USER_FONT_SET_H
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#include <new>
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#include "PLDHashTable.h"
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#include "gfxFontEntry.h"
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#include "gfxFontUtils.h"
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#include "mozilla/AlreadyAddRefed.h"
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#include "mozilla/Atomics.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/RecursiveMutex.h"
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#include "mozilla/RefPtr.h"
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#include "nsCOMPtr.h"
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#include "nsHashKeys.h"
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#include "nsIMemoryReporter.h"
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#include "nsIObserver.h"
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#include "nsIScriptError.h"
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#include "nsISupports.h"
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#include "nsRefPtrHashtable.h"
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#include "nsString.h"
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#include "nsTArray.h"
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#include "nscore.h"
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// Only needed for function bodies.
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#include <utility> // for move, forward
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#include "MainThreadUtils.h" // for NS_IsMainThread
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#include "gfxFontFeatures.h" // for gfxFontFeature
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#include "gfxFontSrcPrincipal.h" // for gfxFontSrcPrincipal
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#include "gfxFontSrcURI.h" // for gfxFontSrcURI
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#include "mozilla/Assertions.h" // for AssertionConditionType, MOZ_ASSERT_HELPER2, MOZ_ASSERT, MOZ_ASSERT_UNREACHABLE, MOZ_ASSER...
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#include "mozilla/HashFunctions.h" // for HashBytes, HashGeneric
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#include "mozilla/TimeStamp.h" // for TimeStamp
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#include "mozilla/gfx/FontVariation.h" // for FontVariation
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#include "nsDebug.h" // for NS_WARNING
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#include "nsIReferrerInfo.h" // for nsIReferrerInfo
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class gfxFont;
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class gfxUserFontSet;
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class nsIFontLoadCompleteCallback;
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class nsIRunnable;
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struct gfxFontStyle;
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struct gfxFontVariationAxis;
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struct gfxFontVariationInstance;
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template <class T>
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class nsMainThreadPtrHandle;
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namespace mozilla {
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class LogModule;
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class PostTraversalTask;
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enum class StyleFontDisplay : uint8_t;
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} // namespace mozilla
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class nsFontFaceLoader;
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// #define DEBUG_USERFONT_CACHE
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class gfxFontFaceBufferSource {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(gfxFontFaceBufferSource)
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public:
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virtual void TakeBuffer(uint8_t*& aBuffer, uint32_t& aLength) = 0;
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protected:
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virtual ~gfxFontFaceBufferSource() = default;
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};
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// parsed CSS @font-face rule information
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// lifetime: from when @font-face rule processed until font is loaded
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struct gfxFontFaceSrc {
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enum SourceType { eSourceType_Local, eSourceType_URL, eSourceType_Buffer };
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SourceType mSourceType;
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// if url, whether to use the origin principal or not
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bool mUseOriginPrincipal = false;
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// Required font technologies.
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mozilla::StyleFontFaceSourceTechFlags mTechFlags;
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// Format hint, if any was specified.
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mozilla::StyleFontFaceSourceFormatKeyword mFormatHint;
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nsCString mLocalName; // full font name if local
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RefPtr<gfxFontSrcURI> mURI; // uri if url
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nsCOMPtr<nsIReferrerInfo> mReferrerInfo; // referrer info if url
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RefPtr<gfxFontSrcPrincipal>
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mOriginPrincipal; // principal if url and mUseOriginPrincipal
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RefPtr<gfxFontFaceBufferSource> mBuffer;
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// The principal that should be used for the load. Should only be used for
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// URL sources.
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already_AddRefed<gfxFontSrcPrincipal> LoadPrincipal(
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const gfxUserFontSet&) const;
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};
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inline bool operator==(const gfxFontFaceSrc& a, const gfxFontFaceSrc& b) {
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if (a.mSourceType != b.mSourceType) {
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return false;
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}
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switch (a.mSourceType) {
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case gfxFontFaceSrc::eSourceType_Local:
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return a.mLocalName == b.mLocalName;
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case gfxFontFaceSrc::eSourceType_URL: {
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if (a.mUseOriginPrincipal != b.mUseOriginPrincipal) {
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return false;
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}
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if (a.mUseOriginPrincipal) {
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if (!a.mOriginPrincipal->Equals(b.mOriginPrincipal)) {
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return false;
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}
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}
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bool equals;
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return a.mFormatHint == b.mFormatHint && a.mTechFlags == b.mTechFlags &&
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(a.mURI == b.mURI || a.mURI->Equals(b.mURI)) &&
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NS_SUCCEEDED(a.mReferrerInfo->Equals(b.mReferrerInfo, &equals)) &&
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equals;
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}
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case gfxFontFaceSrc::eSourceType_Buffer:
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return a.mBuffer == b.mBuffer;
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}
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NS_WARNING("unexpected mSourceType");
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return false;
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}
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// Subclassed to store platform-specific code cleaned out when font entry is
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// deleted.
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// Lifetime: from when platform font is created until it is deactivated.
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// If the platform does not need to add any platform-specific code/data here,
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// then the gfxUserFontSet will allocate a base gfxUserFontData and attach
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// to the entry to track the basic user font info fields here.
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class gfxUserFontData {
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public:
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gfxUserFontData()
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: mSrcIndex(0),
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mMetaOrigLen(0),
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mTechFlags(mozilla::StyleFontFaceSourceTechFlags::Empty()),
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mFormatHint(mozilla::StyleFontFaceSourceFormatKeyword::None),
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mCompression(kUnknownCompression),
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mPrivate(false),
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mIsBuffer(false) {}
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virtual ~gfxUserFontData() = default;
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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nsTArray<uint8_t> mMetadata; // woff metadata block (compressed), if any
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RefPtr<gfxFontSrcURI> mURI; // URI of the source, if it was url()
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RefPtr<gfxFontSrcPrincipal>
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mPrincipal; // principal for the download, if url()
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nsCString mLocalName; // font name used for the source, if local()
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nsCString mRealName; // original fullname from the font resource
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uint32_t mSrcIndex; // index in the rule's source list
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uint32_t mMetaOrigLen; // length needed to decompress metadata
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mozilla::StyleFontFaceSourceTechFlags mTechFlags; // required font tech
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mozilla::StyleFontFaceSourceFormatKeyword
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mFormatHint; // format hint for the source used, if any
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uint8_t mCompression; // compression type
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bool mPrivate; // whether font belongs to a private window
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bool mIsBuffer; // whether the font source was a buffer
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enum {
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kUnknownCompression = 0,
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kZlibCompression = 1,
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kBrotliCompression = 2
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};
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};
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// initially contains a set of userfont font entry objects, replaced with
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// platform/user fonts as downloaded
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class gfxUserFontFamily : public gfxFontFamily {
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public:
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friend class gfxUserFontSet;
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explicit gfxUserFontFamily(const nsACString& aName)
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: gfxFontFamily(aName, FontVisibility::Webfont) {}
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virtual ~gfxUserFontFamily();
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// add the given font entry to the end of the family's list
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void AddFontEntry(gfxFontEntry* aFontEntry) {
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mozilla::AutoWriteLock lock(mLock);
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MOZ_ASSERT(!mIsSimpleFamily, "not valid for user-font families");
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// keep ref while removing existing entry
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RefPtr<gfxFontEntry> fe = aFontEntry;
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// remove existing entry, if already present
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mAvailableFonts.RemoveElement(aFontEntry);
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// insert at the beginning so that the last-defined font is the first
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// one in the fontlist used for matching, as per CSS Fonts spec
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mAvailableFonts.InsertElementAt(0, aFontEntry);
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if (aFontEntry->mFamilyName.IsEmpty()) {
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aFontEntry->mFamilyName = Name();
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} else {
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#ifdef DEBUG
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nsCString thisName = Name();
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nsCString entryName = aFontEntry->mFamilyName;
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ToLowerCase(thisName);
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ToLowerCase(entryName);
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MOZ_ASSERT(thisName.Equals(entryName));
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#endif
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}
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ResetCharacterMap();
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}
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void RemoveFontEntry(gfxFontEntry* aFontEntry) {
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mozilla::AutoWriteLock lock(mLock);
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MOZ_ASSERT(!mIsSimpleFamily, "not valid for user-font families");
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mAvailableFonts.RemoveElement(aFontEntry);
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}
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// Remove all font entries from the family
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void DetachFontEntries() {
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mozilla::AutoWriteLock lock(mLock);
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mAvailableFonts.Clear();
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}
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};
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class gfxUserFontEntry;
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class gfxOTSMessageContext;
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struct gfxUserFontAttributes {
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using FontStretch = mozilla::FontStretch;
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using StretchRange = mozilla::StretchRange;
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using FontSlantStyle = mozilla::FontSlantStyle;
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using SlantStyleRange = mozilla::SlantStyleRange;
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using FontWeight = mozilla::FontWeight;
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using WeightRange = mozilla::WeightRange;
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using StyleFontFaceSourceListComponent =
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mozilla::StyleFontFaceSourceListComponent;
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using RangeFlags = gfxFontEntry::RangeFlags;
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WeightRange mWeight = WeightRange(FontWeight::NORMAL);
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StretchRange mStretch = StretchRange(FontStretch::NORMAL);
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SlantStyleRange mStyle = SlantStyleRange(FontSlantStyle::NORMAL);
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RangeFlags mRangeFlags = RangeFlags::eAutoWeight | RangeFlags::eAutoStretch |
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RangeFlags::eAutoSlantStyle;
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mozilla::StyleFontDisplay mFontDisplay = mozilla::StyleFontDisplay::Auto;
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float mAscentOverride = -1.0;
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float mDescentOverride = -1.0;
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float mLineGapOverride = -1.0;
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float mSizeAdjust = 1.0;
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uint32_t mLanguageOverride = NO_FONT_LANGUAGE_OVERRIDE;
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nsTArray<gfxFontFeature> mFeatureSettings;
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nsTArray<gfxFontVariation> mVariationSettings;
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RefPtr<gfxCharacterMap> mUnicodeRanges;
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nsCString mFamilyName;
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AutoTArray<StyleFontFaceSourceListComponent, 8> mSources;
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};
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class gfxUserFontSet {
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friend class gfxUserFontEntry;
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friend class gfxOTSMessageContext;
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public:
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using FontStretch = mozilla::FontStretch;
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using StretchRange = mozilla::StretchRange;
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using FontSlantStyle = mozilla::FontSlantStyle;
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using SlantStyleRange = mozilla::SlantStyleRange;
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using FontWeight = mozilla::FontWeight;
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using WeightRange = mozilla::WeightRange;
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using RangeFlags = gfxFontEntry::RangeFlags;
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NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
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gfxUserFontSet();
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void Destroy();
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// creates a font face without adding it to a particular family
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// weight - [100, 900] (multiples of 100)
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// stretch = [FontStretch::UltraCondensed(), FontStretch::UltraExpanded()]
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// italic style = constants in gfxFontConstants.h, e.g. NS_FONT_STYLE_NORMAL
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// language override = result of calling
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// nsLayoutUtils::ParseFontLanguageOverride
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// TODO: support for unicode ranges not yet implemented
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virtual already_AddRefed<gfxUserFontEntry> CreateUserFontEntry(
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nsTArray<gfxFontFaceSrc>&& aFontFaceSrcList,
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gfxUserFontAttributes&& aAttr) = 0;
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// creates a font face for the specified family, or returns an existing
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// matching entry on the family if there is one
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already_AddRefed<gfxUserFontEntry> FindOrCreateUserFontEntry(
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nsTArray<gfxFontFaceSrc>&& aFontFaceSrcList,
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gfxUserFontAttributes&& aAttr);
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// add in a font face for which we have the gfxUserFontEntry already
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void AddUserFontEntry(const nsCString& aFamilyName,
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gfxUserFontEntry* aUserFontEntry);
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// Look up and return the gfxUserFontFamily in mFontFamilies with
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// the given name
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virtual already_AddRefed<gfxUserFontFamily> LookupFamily(
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const nsACString& aName) const;
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virtual already_AddRefed<gfxFontSrcPrincipal> GetStandardFontLoadPrincipal()
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const = 0;
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virtual nsPresContext* GetPresContext() const = 0;
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// check whether content policies allow the given URI to load.
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virtual bool IsFontLoadAllowed(const gfxFontFaceSrc&) = 0;
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// initialize the process that loads external font data, which upon
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// completion will call FontDataDownloadComplete method
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virtual nsresult StartLoad(gfxUserFontEntry* aUserFontEntry,
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uint32_t aSrcIndex) = 0;
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// generation - each time a face is loaded, generation is
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// incremented so that the change can be recognized
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uint64_t GetGeneration() { return mGeneration; }
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// increment the generation on font load
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void IncrementGeneration(bool aIsRebuild = false) {
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mozilla::RecursiveMutexAutoLock lock(mMutex);
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IncrementGenerationLocked(aIsRebuild);
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}
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void IncrementGenerationLocked(bool aIsRebuild = false) MOZ_REQUIRES(mMutex);
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// Generation is bumped on font loads but that doesn't affect name-style
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// mappings. Rebuilds do however affect name-style mappings so need to
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// lookup fontlists again when that happens.
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uint64_t GetRebuildGeneration() { return mRebuildGeneration; }
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// rebuild if local rules have been used
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void RebuildLocalRules();
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// Discard any font entries created for src:local(), so that they will
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// be reloaded next time they're needed. This is called when the platform
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// font list has changed, which means local font entries that were set up
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// may no longer be valid.
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virtual void ForgetLocalFaces();
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class UserFontCache {
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public:
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// Record a loaded user-font in the cache. This requires that the
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// font-entry's userFontData has been set up already, as it relies
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// on the URI and Principal recorded there.
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static void CacheFont(gfxFontEntry* aFontEntry);
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// The given gfxFontEntry is being destroyed, so remove any record that
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// refers to it.
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static void ForgetFont(gfxFontEntry* aFontEntry);
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// Return the gfxFontEntry corresponding to a given URI and principal,
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// and the features of the given userfont entry, or nullptr if none is
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// available. The aPrivate flag is set for requests coming from private
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// windows, so we can avoid leaking fonts cached in private windows mode out
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// to normal windows.
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static gfxFontEntry* GetFont(const gfxFontFaceSrc&,
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const gfxUserFontEntry&);
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// Clear everything so that we don't leak URIs and Principals.
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static void Shutdown();
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// Memory-reporting support.
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class MemoryReporter final : public nsIMemoryReporter {
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private:
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~MemoryReporter() = default;
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIMEMORYREPORTER
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};
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#ifdef DEBUG_USERFONT_CACHE
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// dump contents
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static void Dump();
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#endif
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private:
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// Helper that we use to observe the empty-cache notification
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// from nsICacheService.
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class Flusher : public nsIObserver {
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virtual ~Flusher() = default;
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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Flusher() = default;
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};
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// Key used to look up entries in the user-font cache.
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// Note that key comparison does *not* use the mFontEntry field
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// as a whole; it only compares specific fields within the entry
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// (weight/width/style/features) that could affect font selection
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// or rendering, and that must match between a font-set's userfont
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// entry and the corresponding "real" font entry.
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struct Key {
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RefPtr<gfxFontSrcURI> mURI;
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RefPtr<gfxFontSrcPrincipal> mPrincipal; // use nullptr with data: URLs
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// The font entry MUST notify the cache when it is destroyed
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// (by calling ForgetFont()).
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gfxFontEntry* MOZ_NON_OWNING_REF mFontEntry;
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bool mPrivate;
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Key(gfxFontSrcURI* aURI, gfxFontSrcPrincipal* aPrincipal,
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gfxFontEntry* aFontEntry, bool aPrivate)
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: mURI(aURI),
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mPrincipal(aPrincipal),
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mFontEntry(aFontEntry),
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mPrivate(aPrivate) {}
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};
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class Entry : public PLDHashEntryHdr {
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public:
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typedef const Key& KeyType;
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typedef const Key* KeyTypePointer;
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explicit Entry(KeyTypePointer aKey)
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: mURI(aKey->mURI),
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mPrincipal(aKey->mPrincipal),
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mFontEntry(aKey->mFontEntry),
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mPrivate(aKey->mPrivate) {}
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Entry(Entry&& aOther)
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: PLDHashEntryHdr(std::move(aOther)),
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mURI(std::move(aOther.mURI)),
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mPrincipal(std::move(aOther.mPrincipal)),
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mFontEntry(std::move(aOther.mFontEntry)),
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mPrivate(std::move(aOther.mPrivate)) {}
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~Entry() = default;
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bool KeyEquals(const KeyTypePointer aKey) const;
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static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
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static PLDHashNumber HashKey(const KeyTypePointer aKey) {
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PLDHashNumber principalHash =
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aKey->mPrincipal ? aKey->mPrincipal->Hash() : 0;
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return mozilla::HashGeneric(
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principalHash + int(aKey->mPrivate), aKey->mURI->Hash(),
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HashFeatures(aKey->mFontEntry->mFeatureSettings),
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HashVariations(aKey->mFontEntry->mVariationSettings),
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mozilla::HashString(aKey->mFontEntry->mFamilyName),
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aKey->mFontEntry->Weight().AsScalar(),
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aKey->mFontEntry->SlantStyle().AsScalar(),
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aKey->mFontEntry->Stretch().AsScalar(),
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aKey->mFontEntry->AutoRangeFlags(),
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aKey->mFontEntry->mLanguageOverride);
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}
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enum { ALLOW_MEMMOVE = false };
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gfxFontSrcURI* GetURI() const { return mURI; }
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gfxFontSrcPrincipal* GetPrincipal() const { return mPrincipal; }
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gfxFontEntry* GetFontEntry() const { return mFontEntry; }
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bool IsPrivate() const { return mPrivate; }
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void ReportMemory(nsIHandleReportCallback* aHandleReport,
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nsISupports* aData, bool aAnonymize);
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#ifdef DEBUG_USERFONT_CACHE
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void Dump();
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#endif
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private:
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static uint32_t HashFeatures(const nsTArray<gfxFontFeature>& aFeatures) {
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return mozilla::HashBytes(aFeatures.Elements(),
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aFeatures.Length() * sizeof(gfxFontFeature));
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}
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static uint32_t HashVariations(
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const nsTArray<mozilla::gfx::FontVariation>& aVariations) {
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return mozilla::HashBytes(
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aVariations.Elements(),
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aVariations.Length() * sizeof(mozilla::gfx::FontVariation));
|
|
}
|
|
|
|
RefPtr<gfxFontSrcURI> mURI;
|
|
RefPtr<gfxFontSrcPrincipal> mPrincipal; // or nullptr for data: URLs
|
|
|
|
// The "real" font entry corresponding to this downloaded font.
|
|
// The font entry MUST notify the cache when it is destroyed
|
|
// (by calling ForgetFont()).
|
|
gfxFontEntry* MOZ_NON_OWNING_REF mFontEntry;
|
|
|
|
// Whether this font was loaded from a private window.
|
|
bool mPrivate;
|
|
};
|
|
|
|
static nsTHashtable<Entry>* sUserFonts;
|
|
};
|
|
|
|
void SetLocalRulesUsed() { mLocalRulesUsed = true; }
|
|
|
|
static mozilla::LogModule* GetUserFontsLog();
|
|
|
|
// record statistics about font completion
|
|
virtual void RecordFontLoadDone(uint32_t aFontSize,
|
|
mozilla::TimeStamp aDoneTime) {}
|
|
|
|
void GetLoadStatistics(uint32_t& aLoadCount, uint64_t& aLoadSize) const {
|
|
aLoadCount = mDownloadCount;
|
|
aLoadSize = mDownloadSize;
|
|
}
|
|
|
|
protected:
|
|
// Protected destructor, to discourage deletion outside of Release():
|
|
virtual ~gfxUserFontSet();
|
|
|
|
// Return whether the font set is associated with a private-browsing tab.
|
|
virtual bool GetPrivateBrowsing() = 0;
|
|
|
|
// Return whether the font set is associated with a document that was
|
|
// shift-reloaded, for example, and thus should bypass the font cache.
|
|
virtual bool BypassCache() = 0;
|
|
|
|
// parse data for a data URL
|
|
virtual nsresult SyncLoadFontData(gfxUserFontEntry* aFontToLoad,
|
|
const gfxFontFaceSrc* aFontFaceSrc,
|
|
uint8_t*& aBuffer,
|
|
uint32_t& aBufferLength) = 0;
|
|
|
|
// report a problem of some kind (implemented in nsUserFontSet)
|
|
virtual nsresult LogMessage(gfxUserFontEntry* aUserFontEntry,
|
|
uint32_t aSrcIndex, const char* aMessage,
|
|
uint32_t aFlags = nsIScriptError::errorFlag,
|
|
nsresult aStatus = NS_OK) = 0;
|
|
|
|
// helper method for performing the actual userfont set rebuild
|
|
virtual void DoRebuildUserFontSet() = 0;
|
|
|
|
// forget about a loader that has been cancelled
|
|
virtual void RemoveLoader(nsFontFaceLoader* aLoader) = 0;
|
|
|
|
// helper method for FindOrCreateUserFontEntry
|
|
gfxUserFontEntry* FindExistingUserFontEntry(
|
|
gfxUserFontFamily* aFamily,
|
|
const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
const gfxUserFontAttributes& aAttr);
|
|
|
|
// creates a new gfxUserFontFamily in mFontFamilies, or returns an existing
|
|
// family if there is one
|
|
virtual already_AddRefed<gfxUserFontFamily> GetFamily(
|
|
const nsACString& aFamilyName);
|
|
|
|
void ForgetLocalFace(gfxUserFontFamily* aFontFamily);
|
|
|
|
// font families defined by @font-face rules
|
|
nsRefPtrHashtable<nsCStringHashKey, gfxUserFontFamily> mFontFamilies;
|
|
|
|
mozilla::Atomic<uint64_t> mGeneration; // bumped on any font load change
|
|
uint64_t mRebuildGeneration; // only bumped on rebuilds
|
|
|
|
// true when local names have been looked up, false otherwise
|
|
bool mLocalRulesUsed;
|
|
|
|
// true when rules using local names need to be redone
|
|
bool mRebuildLocalRules;
|
|
|
|
// performance stats
|
|
uint32_t mDownloadCount;
|
|
uint64_t mDownloadSize;
|
|
|
|
mutable mozilla::RecursiveMutex mMutex;
|
|
};
|
|
|
|
// acts a placeholder until the real font is downloaded
|
|
|
|
class gfxUserFontEntry : public gfxFontEntry {
|
|
friend class mozilla::PostTraversalTask;
|
|
friend class gfxUserFontSet;
|
|
friend class nsUserFontSet;
|
|
friend class nsFontFaceLoader;
|
|
friend class gfxOTSMessageContext;
|
|
|
|
public:
|
|
enum UserFontLoadState {
|
|
STATUS_NOT_LOADED = 0,
|
|
STATUS_LOAD_PENDING,
|
|
STATUS_LOADING,
|
|
STATUS_LOADED,
|
|
STATUS_FAILED
|
|
};
|
|
|
|
gfxUserFontEntry(nsTArray<gfxFontFaceSrc>&& aFontFaceSrcList,
|
|
gfxUserFontAttributes&& aAttr);
|
|
|
|
~gfxUserFontEntry() override;
|
|
|
|
// Update the attributes of the entry to the given values, without disturbing
|
|
// the associated platform font entry or in-progress downloads.
|
|
void UpdateAttributes(gfxUserFontAttributes&& aAttr);
|
|
|
|
// Return whether the entry matches the given list of attributes
|
|
bool Matches(const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
const gfxUserFontAttributes& aAttr);
|
|
|
|
gfxFont* CreateFontInstance(const gfxFontStyle* aFontStyle) override;
|
|
|
|
gfxFontEntry* GetPlatformFontEntry() const { return mPlatformFontEntry; }
|
|
|
|
// is the font loading or loaded, or did it fail?
|
|
UserFontLoadState LoadState() const { return mUserFontLoadState; }
|
|
|
|
void LoadCanceled() {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
mUserFontLoadState = STATUS_NOT_LOADED;
|
|
mFontDataLoadingState = NOT_LOADING;
|
|
mLoader = nullptr;
|
|
// Reset mCurrentSrcIndex so that all potential sources are re-considered.
|
|
mCurrentSrcIndex = 0;
|
|
mSeenLocalSource = false;
|
|
}
|
|
|
|
// whether to wait before using fallback font or not
|
|
bool WaitForUserFont() const {
|
|
return (mUserFontLoadState == STATUS_LOAD_PENDING ||
|
|
mUserFontLoadState == STATUS_LOADING) &&
|
|
mFontDataLoadingState < LOADING_SLOWLY;
|
|
}
|
|
|
|
// For userfonts, cmap is used to store the unicode range data,
|
|
// and is inert once set, so locking is not required here.
|
|
// no cmap ==> all codepoints permitted
|
|
bool CharacterInUnicodeRange(uint32_t ch) const {
|
|
if (const auto* map = GetUnicodeRangeMap()) {
|
|
return map->test(ch);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
gfxCharacterMap* GetUnicodeRangeMap() const { return GetCharacterMap(); }
|
|
void SetUnicodeRangeMap(RefPtr<gfxCharacterMap>&& aCharMap) {
|
|
auto* oldCmap = GetUnicodeRangeMap();
|
|
if (oldCmap != aCharMap) {
|
|
auto* newCmap = aCharMap.forget().take();
|
|
if (mCharacterMap.compareExchange(oldCmap, newCmap)) {
|
|
NS_IF_RELEASE(oldCmap);
|
|
} else {
|
|
NS_IF_RELEASE(newCmap);
|
|
}
|
|
}
|
|
}
|
|
|
|
mozilla::StyleFontDisplay GetFontDisplay() const { return mFontDisplay; }
|
|
|
|
// load the font - starts the loading of sources which continues until
|
|
// a valid font resource is found or all sources fail
|
|
void Load();
|
|
|
|
// Invalidates appropriately when the load finishes.
|
|
void FontLoadComplete();
|
|
|
|
// methods to expose some information to FontFaceSet::UserFontSet
|
|
// since we can't make that class a friend
|
|
void SetLoader(nsFontFaceLoader* aLoader) {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
mLoader = aLoader;
|
|
}
|
|
|
|
nsFontFaceLoader* GetLoader() const {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
return mLoader;
|
|
}
|
|
|
|
gfxFontSrcPrincipal* GetPrincipal() const { return mPrincipal; }
|
|
void GetFamilyNameAndURIForLogging(uint32_t aSrcIndex,
|
|
nsACString& aFamilyName, nsACString& aURI);
|
|
|
|
gfxFontEntry* Clone() const override {
|
|
MOZ_ASSERT_UNREACHABLE("cannot Clone user fonts");
|
|
return nullptr;
|
|
}
|
|
|
|
virtual already_AddRefed<gfxUserFontSet> GetUserFontSet() const = 0;
|
|
|
|
const nsTArray<gfxFontFaceSrc>& SourceList() const { return mSrcList; }
|
|
|
|
// Returns a weak reference to the requested source record, which is owned
|
|
// by the gfxUserFontEntry.
|
|
const gfxFontFaceSrc& SourceAt(uint32_t aSrcIndex) const {
|
|
return mSrcList[aSrcIndex];
|
|
}
|
|
|
|
// The variation-query APIs should not be called on placeholders.
|
|
bool HasVariations() override {
|
|
MOZ_ASSERT_UNREACHABLE("not meaningful for a userfont placeholder");
|
|
return false;
|
|
}
|
|
void GetVariationAxes(nsTArray<gfxFontVariationAxis>&) override {
|
|
MOZ_ASSERT_UNREACHABLE("not meaningful for a userfont placeholder");
|
|
}
|
|
void GetVariationInstances(nsTArray<gfxFontVariationInstance>&) override {
|
|
MOZ_ASSERT_UNREACHABLE("not meaningful for a userfont placeholder");
|
|
}
|
|
|
|
protected:
|
|
struct OTSMessage {
|
|
nsCString mMessage;
|
|
int mLevel; // see OTSContext in gfx/ots/include/opentype-sanitizer.h
|
|
};
|
|
|
|
const uint8_t* SanitizeOpenTypeData(const uint8_t* aData, uint32_t aLength,
|
|
uint32_t& aSanitaryLength,
|
|
gfxUserFontType& aFontType,
|
|
nsTArray<OTSMessage>& aMessages);
|
|
|
|
// attempt to load the next resource in the src list.
|
|
void LoadNextSrc();
|
|
void ContinueLoad();
|
|
void DoLoadNextSrc(bool aIsContinue);
|
|
|
|
// change the load state
|
|
virtual void SetLoadState(UserFontLoadState aLoadState);
|
|
|
|
// when download has been completed, pass back data here
|
|
// aDownloadStatus == NS_OK ==> download succeeded, error otherwise
|
|
// Ownership of aFontData is passed in here; the font set must
|
|
// ensure that it is eventually deleted with free().
|
|
void FontDataDownloadComplete(uint32_t aSrcIndex, const uint8_t* aFontData,
|
|
uint32_t aLength, nsresult aDownloadStatus,
|
|
nsIFontLoadCompleteCallback* aCallback);
|
|
|
|
// helper method for creating a platform font
|
|
// returns true if platform font creation successful
|
|
// Ownership of aFontData is passed in here; the font must
|
|
// ensure that it is eventually deleted with free().
|
|
bool LoadPlatformFontSync(uint32_t aSrcIndex, const uint8_t* aFontData,
|
|
uint32_t aLength);
|
|
|
|
void LoadPlatformFontAsync(uint32_t aSrcIndex, const uint8_t* aFontData,
|
|
uint32_t aLength,
|
|
nsIFontLoadCompleteCallback* aCallback);
|
|
|
|
// helper method for LoadPlatformFontAsync; runs on a background thread
|
|
void StartPlatformFontLoadOnBackgroundThread(
|
|
uint32_t aSrcIndex, const uint8_t* aFontData, uint32_t aLength,
|
|
nsMainThreadPtrHandle<nsIFontLoadCompleteCallback> aCallback);
|
|
|
|
// helper method for LoadPlatformFontAsync; runs on the main thread
|
|
void ContinuePlatformFontLoadOnMainThread(
|
|
uint32_t aSrcIndex, const uint8_t* aOriginalFontData,
|
|
uint32_t aOriginalLength, gfxUserFontType aFontType,
|
|
const uint8_t* aSanitizedFontData, uint32_t aSanitizedLength,
|
|
nsTArray<OTSMessage>&& aMessages,
|
|
nsMainThreadPtrHandle<nsIFontLoadCompleteCallback> aCallback);
|
|
|
|
// helper method for LoadPlatformFontSync and
|
|
// ContinuePlatformFontLoadOnMainThread; runs on the main thread
|
|
bool LoadPlatformFont(uint32_t aSrcIndex, const uint8_t* aOriginalFontData,
|
|
uint32_t aOriginalLength, gfxUserFontType aFontType,
|
|
const uint8_t* aSanitizedFontData,
|
|
uint32_t aSanitizedLength,
|
|
nsTArray<OTSMessage>&& aMessages);
|
|
|
|
// helper method for FontDataDownloadComplete and
|
|
// ContinuePlatformFontLoadOnMainThread; runs on the main thread
|
|
void FontLoadFailed(nsIFontLoadCompleteCallback* aCallback);
|
|
|
|
// store metadata and src details for current src into aFontEntry
|
|
void StoreUserFontData(gfxFontEntry* aFontEntry, uint32_t aSrcIndex,
|
|
bool aPrivate, const nsACString& aOriginalName,
|
|
FallibleTArray<uint8_t>* aMetadata,
|
|
uint32_t aMetaOrigLen, uint8_t aCompression);
|
|
|
|
// Clears and then adds to aResult all of the user font sets that this user
|
|
// font entry has been added to. This will at least include the owner of this
|
|
// user font entry.
|
|
virtual void GetUserFontSets(nsTArray<RefPtr<gfxUserFontSet>>& aResult);
|
|
|
|
// general load state
|
|
UserFontLoadState mUserFontLoadState;
|
|
|
|
// detailed load state while font data is loading
|
|
// used to determine whether to use fallback font or not
|
|
// note that code depends on the ordering of these values!
|
|
enum FontDataLoadingState {
|
|
NOT_LOADING = 0, // not started to load any font resources yet
|
|
LOADING_STARTED, // loading has started; hide fallback font
|
|
LOADING_ALMOST_DONE, // timeout happened but we're nearly done,
|
|
// so keep hiding fallback font
|
|
LOADING_SLOWLY, // timeout happened and we're not nearly done,
|
|
// so use the fallback font
|
|
LOADING_TIMED_OUT, // font load took too long
|
|
LOADING_FAILED // failed to load any source: use fallback
|
|
};
|
|
FontDataLoadingState mFontDataLoadingState;
|
|
|
|
bool mSeenLocalSource;
|
|
bool mUnsupportedFormat;
|
|
mozilla::StyleFontDisplay mFontDisplay; // timing of userfont fallback
|
|
|
|
RefPtr<gfxFontEntry> mPlatformFontEntry;
|
|
nsTArray<gfxFontFaceSrc> mSrcList;
|
|
uint32_t mCurrentSrcIndex; // index of src item to be loaded next
|
|
// This field is managed by the nsFontFaceLoader. In the destructor and
|
|
// Cancel() methods of nsFontFaceLoader this reference is nulled out.
|
|
nsFontFaceLoader* MOZ_NON_OWNING_REF
|
|
mLoader; // current loader for this entry, if any
|
|
RefPtr<gfxUserFontSet> mLoadingFontSet;
|
|
RefPtr<gfxFontSrcPrincipal> mPrincipal;
|
|
};
|
|
|
|
#endif /* GFX_USER_FONT_SET_H */
|