mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
654 lines
25 KiB
C++
654 lines
25 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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#ifndef GFX_USER_FONT_SET_H
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#define GFX_USER_FONT_SET_H
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#include "gfxFont.h"
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#include "nsRefPtrHashtable.h"
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#include "nsAutoPtr.h"
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#include "nsCOMPtr.h"
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#include "nsIURI.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptError.h"
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#include "nsURIHashKey.h"
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class nsFontFaceLoader;
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//#define DEBUG_USERFONT_CACHE
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class gfxFontFaceBufferSource
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{
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NS_INLINE_DECL_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() {}
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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 {
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eSourceType_Local,
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eSourceType_URL,
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eSourceType_Buffer
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};
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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;
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// format hint flags, union of all possible formats
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// (e.g. TrueType, EOT, SVG, etc.)
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// see FLAG_FORMAT_* enum values below
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uint32_t mFormatFlags;
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nsString mLocalName; // full font name if local
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nsCOMPtr<nsIURI> mURI; // uri if url
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nsCOMPtr<nsIURI> mReferrer; // referrer url if url
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nsCOMPtr<nsIPrincipal> mOriginPrincipal; // principal if url
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nsRefPtr<gfxFontFaceBufferSource> mBuffer;
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};
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inline bool
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operator==(const gfxFontFaceSrc& a, const gfxFontFaceSrc& b)
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{
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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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bool equals;
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return a.mUseOriginPrincipal == b.mUseOriginPrincipal &&
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a.mFormatFlags == b.mFormatFlags &&
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NS_SUCCEEDED(a.mURI->Equals(b.mURI, &equals)) && equals &&
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NS_SUCCEEDED(a.mReferrer->Equals(b.mReferrer, &equals)) &&
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equals &&
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a.mOriginPrincipal->Equals(b.mOriginPrincipal);
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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), mFormat(0), mMetaOrigLen(0),
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mCRC32(0), mLength(0), mCompression(kUnknownCompression),
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mPrivate(false), mIsBuffer(false)
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{ }
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virtual ~gfxUserFontData() { }
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nsTArray<uint8_t> mMetadata; // woff metadata block (compressed), if any
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nsCOMPtr<nsIURI> mURI; // URI of the source, if it was url()
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nsCOMPtr<nsIPrincipal> mPrincipal; // principal for the download, if url()
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nsString mLocalName; // font name used for the source, if local()
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nsString 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 mFormat; // format hint for the source used, if any
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uint32_t mMetaOrigLen; // length needed to decompress metadata
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uint32_t mCRC32; // Checksum
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uint32_t mLength; // Font length
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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 nsAString& aName)
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: gfxFontFamily(aName) { }
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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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// keep ref while removing existing entry
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nsRefPtr<gfxFontEntry> fe = aFontEntry;
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// remove existing entry, if already present
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mAvailableFonts.RemoveElement(aFontEntry);
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mAvailableFonts.AppendElement(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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nsString thisName = Name();
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nsString 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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// Remove all font entries from the family
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void DetachFontEntries() {
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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 gfxOTSContext;
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class gfxUserFontSet {
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friend class gfxUserFontEntry;
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friend class gfxOTSContext;
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public:
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NS_INLINE_DECL_REFCOUNTING(gfxUserFontSet)
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gfxUserFontSet();
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enum {
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// no flags ==> no hint set
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// unknown ==> unknown format hint set
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FLAG_FORMAT_UNKNOWN = 1,
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FLAG_FORMAT_OPENTYPE = 1 << 1,
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FLAG_FORMAT_TRUETYPE = 1 << 2,
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FLAG_FORMAT_TRUETYPE_AAT = 1 << 3,
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FLAG_FORMAT_EOT = 1 << 4,
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FLAG_FORMAT_SVG = 1 << 5,
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FLAG_FORMAT_WOFF = 1 << 6,
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FLAG_FORMAT_WOFF2 = 1 << 7,
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// the common formats that we support everywhere
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FLAG_FORMATS_COMMON = FLAG_FORMAT_OPENTYPE |
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FLAG_FORMAT_TRUETYPE |
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FLAG_FORMAT_WOFF |
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FLAG_FORMAT_WOFF2,
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// mask of all unused bits, update when adding new formats
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FLAG_FORMAT_NOT_USED = ~((1 << 8)-1)
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};
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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 = [NS_FONT_STRETCH_ULTRA_CONDENSED, NS_FONT_STRETCH_ULTRA_EXPANDED]
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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 gfxFontStyle::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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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) = 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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const nsAString& aFamilyName,
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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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// add in a font face for which we have the gfxUserFontEntry already
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void AddUserFontEntry(const nsAString& aFamilyName,
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gfxUserFontEntry* aUserFontEntry);
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// Whether there is a face with this family name
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bool HasFamily(const nsAString& aFamilyName) const
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{
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return LookupFamily(aFamilyName) != nullptr;
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}
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// Look up and return the gfxUserFontFamily in mFontFamilies with
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// the given name
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gfxUserFontFamily* LookupFamily(const nsAString& aName) const;
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// Lookup a font entry for a given style, returns null if not loaded.
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// aFamily must be a family returned by our LookupFamily method.
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// (only used by gfxPangoFontGroup for now)
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gfxUserFontEntry* FindUserFontEntryAndLoad(gfxFontFamily* aFamily,
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const gfxFontStyle& aFontStyle,
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bool& aNeedsBold,
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bool& aWaitForUserFont);
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// check whether the given source is allowed to be loaded;
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// returns the Principal (for use in the key when caching the loaded font),
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// and whether the load should bypass the cache (force-reload).
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virtual nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
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nsIPrincipal** aPrincipal,
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bool* aBypassCache) = 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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const gfxFontFaceSrc* aFontFaceSrc) = 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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// 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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class UserFontCache {
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public:
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// Flag passed when caching a font entry, to specify whether the entry
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// should persist in the cache or be discardable.
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typedef enum {
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kDiscardable,
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kPersistent
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} EntryPersistence;
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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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// If aPersistence is Persistent, the entry will remain in the cache
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// across cacheservice:empty-cache notifications. This is used for
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// "preloaded hidden fonts" on FxOS.
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static void CacheFont(gfxFontEntry* aFontEntry,
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EntryPersistence aPersistence = kDiscardable);
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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 available.
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// The aPrivate flag is set for requests coming from private windows,
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// so we can avoid leaking fonts cached in private windows mode out to
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// normal windows.
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static gfxFontEntry* GetFont(nsIURI* aSrcURI,
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nsIPrincipal* aPrincipal,
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gfxUserFontEntry* aUserFontEntry,
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bool aPrivate);
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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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#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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{
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virtual ~Flusher() {}
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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Flusher() {}
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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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nsCOMPtr<nsIURI> mURI;
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nsCOMPtr<nsIPrincipal> mPrincipal; // use nullptr with data: URLs
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gfxFontEntry* mFontEntry;
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uint32_t mCRC32;
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uint32_t mLength;
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bool mPrivate;
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EntryPersistence mPersistence;
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Key(nsIURI* aURI, nsIPrincipal* aPrincipal,
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gfxFontEntry* aFontEntry, bool aPrivate,
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EntryPersistence aPersistence = kDiscardable)
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: mURI(aURI),
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mPrincipal(aPrincipal),
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mFontEntry(aFontEntry),
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mCRC32(0),
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mLength(0),
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mPrivate(aPrivate),
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mPersistence(aPersistence)
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{ }
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Key(uint32_t aCRC32, uint32_t aLength,
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gfxFontEntry* aFontEntry, bool aPrivate,
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EntryPersistence aPersistence = kDiscardable)
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: mURI(nullptr),
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mPrincipal(nullptr),
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mFontEntry(aFontEntry),
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mCRC32(aCRC32),
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mLength(aLength),
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mPrivate(aPrivate),
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mPersistence(aPersistence)
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{ }
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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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mCRC32(aKey->mCRC32),
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mLength(aKey->mLength),
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mFontEntry(aKey->mFontEntry),
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mPrivate(aKey->mPrivate),
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mPersistence(aKey->mPersistence)
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{ }
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Entry(const Entry& aOther)
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: mURI(aOther.mURI),
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mPrincipal(aOther.mPrincipal),
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mCRC32(aOther.mCRC32),
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mLength(aOther.mLength),
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mFontEntry(aOther.mFontEntry),
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mPrivate(aOther.mPrivate),
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mPersistence(aOther.mPersistence)
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{ }
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~Entry() { }
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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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if (aKey->mLength) {
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return aKey->mCRC32;
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}
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uint32_t principalHash = 0;
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if (aKey->mPrincipal) {
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aKey->mPrincipal->GetHashValue(&principalHash);
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}
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return mozilla::HashGeneric(principalHash + int(aKey->mPrivate),
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nsURIHashKey::HashKey(aKey->mURI),
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HashFeatures(aKey->mFontEntry->mFeatureSettings),
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mozilla::HashString(aKey->mFontEntry->mFamilyName),
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((uint32_t)aKey->mFontEntry->mItalic |
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(aKey->mFontEntry->mWeight << 1) |
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(aKey->mFontEntry->mStretch << 10) ) ^
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aKey->mFontEntry->mLanguageOverride);
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}
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enum { ALLOW_MEMMOVE = false };
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gfxFontEntry* GetFontEntry() const { return mFontEntry; }
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static PLDHashOperator
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RemoveUnlessPersistent(Entry* aEntry, void* aUserData);
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static PLDHashOperator
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RemoveIfPrivate(Entry* aEntry, void* aUserData);
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static PLDHashOperator
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RemoveIfMatches(Entry* aEntry, void* aUserData);
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static PLDHashOperator
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DisconnectSVG(Entry* aEntry, void* aUserData);
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#ifdef DEBUG_USERFONT_CACHE
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static PLDHashOperator DumpEntry(Entry* aEntry, void* aUserData);
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#endif
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private:
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static uint32_t
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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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nsCOMPtr<nsIURI> mURI;
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nsCOMPtr<nsIPrincipal> mPrincipal; // or nullptr for data: URLs
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uint32_t mCRC32;
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uint32_t mLength;
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// The "real" font entry corresponding to this downloaded font.
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// The font entry MUST notify the cache when it is destroyed
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// (by calling Forget()).
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gfxFontEntry* mFontEntry;
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// Whether this font was loaded from a private window.
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bool mPrivate;
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// Whether this entry should survive cache-flushing.
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EntryPersistence mPersistence;
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};
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static nsTHashtable<Entry>* sUserFonts;
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};
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void SetLocalRulesUsed() {
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mLocalRulesUsed = true;
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}
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#ifdef PR_LOGGING
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static PRLogModuleInfo* GetUserFontsLog();
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#endif
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protected:
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// Protected destructor, to discourage deletion outside of Release():
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virtual ~gfxUserFontSet();
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// Return whether the font set is associated with a private-browsing tab.
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virtual bool GetPrivateBrowsing() = 0;
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// parse data for a data URL
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virtual nsresult SyncLoadFontData(gfxUserFontEntry* aFontToLoad,
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const gfxFontFaceSrc* aFontFaceSrc,
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uint8_t* &aBuffer,
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uint32_t &aBufferLength) = 0;
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// report a problem of some kind (implemented in nsUserFontSet)
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virtual nsresult LogMessage(gfxUserFontEntry* aUserFontEntry,
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const char* aMessage,
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uint32_t aFlags = nsIScriptError::errorFlag,
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nsresult aStatus = NS_OK) = 0;
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// helper method for performing the actual userfont set rebuild
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virtual void DoRebuildUserFontSet() = 0;
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// helper method for FindOrCreateUserFontEntry
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gfxUserFontEntry* FindExistingUserFontEntry(
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gfxUserFontFamily* aFamily,
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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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// creates a new gfxUserFontFamily in mFontFamilies, or returns an existing
|
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// family if there is one
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|
gfxUserFontFamily* GetFamily(const nsAString& aFamilyName);
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|
|
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// font families defined by @font-face rules
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|
nsRefPtrHashtable<nsStringHashKey, gfxUserFontFamily> mFontFamilies;
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|
|
|
uint64_t mGeneration; // bumped on any font load change
|
|
uint64_t mRebuildGeneration; // only bumped on rebuilds
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|
|
|
// true when local names have been looked up, false otherwise
|
|
bool mLocalRulesUsed;
|
|
};
|
|
|
|
// acts a placeholder until the real font is downloaded
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|
|
|
class gfxUserFontEntry : public gfxFontEntry {
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|
friend class gfxUserFontSet;
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|
friend class nsUserFontSet;
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friend class nsFontFaceLoader;
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|
friend class gfxOTSContext;
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|
|
|
public:
|
|
enum UserFontLoadState {
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|
STATUS_NOT_LOADED = 0,
|
|
STATUS_LOADING,
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|
STATUS_LOADED,
|
|
STATUS_FAILED
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|
};
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|
|
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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,
|
|
uint32_t aItalicStyle,
|
|
const nsTArray<gfxFontFeature>& aFeatureSettings,
|
|
uint32_t aLanguageOverride,
|
|
gfxSparseBitSet* aUnicodeRanges);
|
|
|
|
virtual ~gfxUserFontEntry();
|
|
|
|
// Return whether the entry matches the given list of attributes
|
|
bool Matches(const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
|
|
uint32_t aWeight,
|
|
int32_t aStretch,
|
|
uint32_t aItalicStyle,
|
|
const nsTArray<gfxFontFeature>& aFeatureSettings,
|
|
uint32_t aLanguageOverride,
|
|
gfxSparseBitSet* aUnicodeRanges);
|
|
|
|
virtual gfxFont* CreateFontInstance(const gfxFontStyle* aFontStyle,
|
|
bool aNeedsBold);
|
|
|
|
gfxFontEntry* GetPlatformFontEntry() { return mPlatformFontEntry; }
|
|
|
|
// is the font loading or loaded, or did it fail?
|
|
UserFontLoadState LoadState() const { return mUserFontLoadState; }
|
|
|
|
// whether to wait before using fallback font or not
|
|
bool WaitForUserFont() const {
|
|
return mUserFontLoadState == STATUS_LOADING &&
|
|
mFontDataLoadingState < LOADING_SLOWLY;
|
|
}
|
|
|
|
// for userfonts, cmap is used to store the unicode range data
|
|
// no cmap ==> all codepoints permitted
|
|
bool CharacterInUnicodeRange(uint32_t ch) const {
|
|
if (mCharacterMap) {
|
|
return mCharacterMap->test(ch);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
gfxCharacterMap* GetUnicodeRangeMap() const {
|
|
return mCharacterMap.get();
|
|
}
|
|
|
|
// load the font - starts the loading of sources which continues until
|
|
// a valid font resource is found or all sources fail
|
|
void Load();
|
|
|
|
// methods to expose some information to FontFaceSet::UserFontSet
|
|
// since we can't make that class a friend
|
|
void SetLoader(nsFontFaceLoader* aLoader) { mLoader = aLoader; }
|
|
nsFontFaceLoader* GetLoader() { return mLoader; }
|
|
nsIPrincipal* GetPrincipal() { return mPrincipal; }
|
|
uint32_t GetSrcIndex() { return mSrcIndex; }
|
|
void GetFamilyNameAndURIForLogging(nsACString& aFamilyName,
|
|
nsACString& aURI);
|
|
|
|
protected:
|
|
const uint8_t* SanitizeOpenTypeData(const uint8_t* aData,
|
|
uint32_t aLength,
|
|
uint32_t& aSaneLength,
|
|
gfxUserFontType aFontType);
|
|
|
|
// attempt to load the next resource in the src list.
|
|
void LoadNextSrc();
|
|
|
|
// 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
|
|
// returns true if platform font creation sucessful (or local()
|
|
// reference was next in line)
|
|
// Ownership of aFontData is passed in here; the font set must
|
|
// ensure that it is eventually deleted with NS_Free().
|
|
bool FontDataDownloadComplete(const uint8_t* aFontData, uint32_t aLength,
|
|
nsresult aDownloadStatus);
|
|
|
|
// 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 NS_Free().
|
|
bool LoadPlatformFont(const uint8_t* aFontData, uint32_t& aLength);
|
|
|
|
// store metadata and src details for current src into aFontEntry
|
|
void StoreUserFontData(gfxFontEntry* aFontEntry,
|
|
bool aPrivate,
|
|
const nsAString& aOriginalName,
|
|
FallibleTArray<uint8_t>* aMetadata,
|
|
uint32_t aMetaOrigLen,
|
|
uint8_t aCompression);
|
|
|
|
// 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_FAILED // failed to load any source: use fallback
|
|
};
|
|
FontDataLoadingState mFontDataLoadingState;
|
|
|
|
bool mUnsupportedFormat;
|
|
|
|
nsRefPtr<gfxFontEntry> mPlatformFontEntry;
|
|
nsTArray<gfxFontFaceSrc> mSrcList;
|
|
uint32_t mSrcIndex; // index of loading src item
|
|
nsFontFaceLoader* mLoader; // current loader for this entry, if any
|
|
gfxUserFontSet* mFontSet; // font-set to which the userfont entry belongs
|
|
nsCOMPtr<nsIPrincipal> mPrincipal;
|
|
};
|
|
|
|
|
|
#endif /* GFX_USER_FONT_SET_H */
|