зеркало из https://github.com/mozilla/gecko-dev.git
252 строки
9.0 KiB
C++
252 строки
9.0 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 gfxMacPlatformFontList_H_
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#define gfxMacPlatformFontList_H_
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#include <CoreFoundation/CoreFoundation.h>
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsDataHashtable.h"
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#include "nsRefPtrHashtable.h"
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#include "gfxPlatformFontList.h"
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#include "gfxPlatform.h"
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#include "gfxPlatformMac.h"
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#include "nsUnicharUtils.h"
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#include "nsTArray.h"
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#include "mozilla/LookAndFeel.h"
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#include "mozilla/gfx/UnscaledFontMac.h"
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class gfxMacPlatformFontList;
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// a single member of a font family (i.e. a single face, such as Times Italic)
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class MacOSFontEntry : public gfxFontEntry {
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public:
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friend class gfxMacPlatformFontList;
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friend class gfxMacFont;
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MacOSFontEntry(const nsACString& aPostscriptName, WeightRange aWeight,
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bool aIsStandardFace = false, double aSizeHint = 0.0);
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// for use with data fonts
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MacOSFontEntry(const nsACString& aPostscriptName, CGFontRef aFontRef,
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WeightRange aWeight, StretchRange aStretch,
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SlantStyleRange aStyle, bool aIsDataUserFont, bool aIsLocal);
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virtual ~MacOSFontEntry() {
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if (mTrakTable) {
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hb_blob_destroy(mTrakTable);
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}
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::CGFontRelease(mFontRef);
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}
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gfxFontEntry* Clone() const override;
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CGFontRef GetFontRef();
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// override gfxFontEntry table access function to bypass table cache,
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// use CGFontRef API to get direct access to system font data
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hb_blob_t* GetFontTable(uint32_t aTag) override;
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void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontListSizes* aSizes) const override;
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nsresult ReadCMAP(FontInfoData* aFontInfoData = nullptr) override;
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bool RequiresAATLayout() const { return mRequiresAAT; }
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bool HasVariations() override;
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void GetVariationAxes(
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nsTArray<gfxFontVariationAxis>& aVariationAxes) override;
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void GetVariationInstances(
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nsTArray<gfxFontVariationInstance>& aInstances) override;
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bool IsCFF();
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// Return true if the font has a 'trak' table (and we can successfully
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// interpret it), otherwise false. This will load and cache the table
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// the first time it is called.
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bool HasTrackingTable();
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bool SupportsOpenTypeFeature(Script aScript, uint32_t aFeatureTag) override;
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// Return the tracking (in font units) to be applied for the given size.
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// (This is a floating-point number because of possible interpolation.)
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float TrackingForCSSPx(float aPointSize) const;
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protected:
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gfxFont* CreateFontInstance(const gfxFontStyle* aFontStyle) override;
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bool HasFontTable(uint32_t aTableTag) override;
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// Helper for HasTrackingTable; check/parse the table and cache pointers
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// to the subtables we need. Returns false on failure, in which case the
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// table is unusable.
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bool ParseTrakTable();
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static void DestroyBlobFunc(void* aUserData);
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CGFontRef
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mFontRef; // owning reference to the CGFont, released on destruction
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double mSizeHint;
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bool mFontRefInitialized;
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bool mRequiresAAT;
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bool mIsCFF;
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bool mIsCFFInitialized;
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bool mHasVariations;
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bool mHasVariationsInitialized;
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bool mHasAATSmallCaps;
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bool mHasAATSmallCapsInitialized;
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bool mCheckedForTracking;
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// To work around Core Text's mishandling of the default value for 'opsz',
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// we need to record whether the font has an a optical size axis, what its
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// range and default values are, and a usable close-to-default alternative.
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// (See bug 1457417 for details.)
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// These fields are used by gfxMacFont, but stored in the font entry so
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// that only a single font instance needs to inspect the available
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// variations.
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bool mCheckedForOpszAxis;
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bool mHasOpszAxis;
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gfxFontVariationAxis mOpszAxis;
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float mAdjustedDefaultOpsz;
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nsTHashtable<nsUint32HashKey> mAvailableTables;
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mozilla::ThreadSafeWeakPtr<mozilla::gfx::UnscaledFontMac> mUnscaledFont;
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// For AAT font being shaped by Core Text, a strong reference to the 'trak'
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// table (if present).
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hb_blob_t* mTrakTable;
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// Cached pointers to tables within 'trak', initialized by ParseTrakTable.
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const mozilla::AutoSwap_PRInt16* mTrakValues;
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const mozilla::AutoSwap_PRInt32* mTrakSizeTable;
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uint16_t mNumTrakSizes;
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};
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class gfxMacPlatformFontList : public gfxPlatformFontList {
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public:
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static gfxMacPlatformFontList* PlatformFontList() {
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return static_cast<gfxMacPlatformFontList*>(sPlatformFontList);
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}
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gfxFontFamily* CreateFontFamily(const nsACString& aName) const override;
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static int32_t AppleWeightToCSSWeight(int32_t aAppleWeight);
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bool GetStandardFamilyName(const nsCString& aFontName,
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nsACString& aFamilyName) override;
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gfxFontEntry* LookupLocalFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry) override;
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gfxFontEntry* MakePlatformFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry,
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const uint8_t* aFontData,
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uint32_t aLength) override;
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bool FindAndAddFamilies(const nsACString& aFamily,
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nsTArray<FamilyAndGeneric>* aOutput,
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FindFamiliesFlags aFlags,
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gfxFontStyle* aStyle = nullptr,
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gfxFloat aDevToCssSize = 1.0) override;
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// lookup the system font for a particular system font type and set
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// the name and style characteristics
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void LookupSystemFont(mozilla::LookAndFeel::FontID aSystemFontID,
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nsACString& aSystemFontName, gfxFontStyle& aFontStyle,
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float aDevPixPerCSSPixel);
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// Values for the entryType field in FontFamilyListEntry records passed
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// from chrome to content process.
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enum FontFamilyEntryType {
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kStandardFontFamily = 0, // a standard installed font family
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kHiddenSystemFontFamily = 1, // hidden system family, not exposed to UI
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kTextSizeSystemFontFamily = 2, // name of 'system' font at text sizes
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kDisplaySizeSystemFontFamily = 3 // 'system' font at display sizes
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};
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void ReadSystemFontList(
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InfallibleTArray<mozilla::dom::SystemFontListEntry>* aList);
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protected:
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gfxFontFamily* GetDefaultFontForPlatform(const gfxFontStyle* aStyle) override;
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private:
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friend class gfxPlatformMac;
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gfxMacPlatformFontList();
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virtual ~gfxMacPlatformFontList();
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// initialize font lists
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nsresult InitFontListForPlatform() override;
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// special case font faces treated as font families (set via prefs)
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void InitSingleFaceList();
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// initialize system fonts
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void InitSystemFontNames();
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// helper function to lookup in both hidden system fonts and normal fonts
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gfxFontFamily* FindSystemFontFamily(const nsACString& aFamily);
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static void RegisteredFontsChangedNotificationCallback(
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CFNotificationCenterRef center, void* observer, CFStringRef name,
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const void* object, CFDictionaryRef userInfo);
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// attempt to use platform-specific fallback for the given character
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// return null if no usable result found
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gfxFontEntry* PlatformGlobalFontFallback(
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const uint32_t aCh, Script aRunScript, const gfxFontStyle* aMatchStyle,
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gfxFontFamily** aMatchedFamily) override;
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bool UsesSystemFallback() override { return true; }
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already_AddRefed<FontInfoData> CreateFontInfoData() override;
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// Add the specified family to mSystemFontFamilies or mFontFamilies.
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// Ideally we'd use NSString* instead of CFStringRef here, but this header
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// file is included in .cpp files, so we can't use objective C classes here.
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// But CFStringRef and NSString* are the same thing anyway (they're
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// toll-free bridged).
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void AddFamily(CFStringRef aFamily);
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void AddFamily(const nsACString& aFamilyName, bool aSystemFont);
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void ActivateFontsFromDir(nsIFile* aDir);
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#ifdef MOZ_BUNDLED_FONTS
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void ActivateBundledFonts();
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#endif
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enum { kATSGenerationInitial = -1 };
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// default font for use with system-wide font fallback
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CTFontRef mDefaultFont;
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// hidden system fonts used within UI elements, there may be a whole set
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// for different locales (e.g. .Helvetica Neue UI, .SF NS Text)
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FontFamilyTable mSystemFontFamilies;
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// font families that -apple-system maps to
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// Pre-10.11 this was always a single font family, such as Lucida Grande
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// or Helvetica Neue. For OSX 10.11, Apple uses pair of families
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// for the UI, one for text sizes and another for display sizes
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bool mUseSizeSensitiveSystemFont;
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nsCString mSystemTextFontFamilyName;
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nsCString mSystemDisplayFontFamilyName; // only used on OSX 10.11
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};
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#endif /* gfxMacPlatformFontList_H_ */
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