FontFace.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_FontFace_h

#define mozilla_dom_FontFace_h

#include "mozilla/dom/FontFaceBinding.h"

#include "mozilla/GlobalTeardownObserver.h"

#include "mozilla/ServoStyleConsts.h"

#include "gfxUserFontSet.h"

#include "nsWrapperCache.h"

class gfxFontFaceBufferSource;

class nsIGlobalObject;

namespace mozilla {

struct CSSFontFaceDescriptors;

class PostTraversalTask;

struct StyleLockedFontFaceRule;

namespace dom {

class CSSFontFaceRule;

class FontFaceBufferSource;

struct FontFaceDescriptors;

class FontFaceImpl;

class FontFaceSet;

class FontFaceSetImpl;

class Promise;

class UTF8StringOrArrayBufferOrArrayBufferView;

}  // namespace dom

}  // namespace mozilla

namespace mozilla::dom {

class FontFace final : public GlobalTeardownObserver, public nsWrapperCache {

  friend class mozilla::PostTraversalTask;

 public:

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(FontFace)

  void DisconnectFromOwner() final;

  nsIGlobalObject* GetParentObject() const { return GetOwnerGlobal(); }

  JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) override;

  static already_AddRefed<FontFace> CreateForRule(

      nsIGlobalObject* aGlobal, FontFaceSet* aFontFaceSet,

      StyleLockedFontFaceRule* aRule);

  // Web IDL

  static already_AddRefed<FontFace> Constructor(

      const GlobalObject& aGlobal, const nsACString& aFamily,

      const UTF8StringOrArrayBufferOrArrayBufferView& aSource,

      const FontFaceDescriptors& aDescriptors, ErrorResult& aRV);

  void GetFamily(nsACString& aResult);

  void SetFamily(const nsACString& aValue, ErrorResult& aRv);

  void GetStyle(nsACString& aResult);

  void SetStyle(const nsACString& aValue, ErrorResult& aRv);

  void GetWeight(nsACString& aResult);

  void SetWeight(const nsACString& aValue, ErrorResult& aRv);

  void GetStretch(nsACString& aResult);

  void SetStretch(const nsACString& aValue, ErrorResult& aRv);

  void GetUnicodeRange(nsACString& aResult);

  void SetUnicodeRange(const nsACString& aValue, ErrorResult& aRv);

  void GetVariant(nsACString& aResult);

  void SetVariant(const nsACString& aValue, ErrorResult& aRv);

  void GetFeatureSettings(nsACString& aResult);

  void SetFeatureSettings(const nsACString& aValue, ErrorResult& aRv);

  void GetVariationSettings(nsACString& aResult);

  void SetVariationSettings(const nsACString& aValue, ErrorResult& aRv);

  void GetDisplay(nsACString& aResult);

  void SetDisplay(const nsACString& aValue, ErrorResult& aRv);

  void GetAscentOverride(nsACString& aResult);

  void SetAscentOverride(const nsACString& aValue, ErrorResult& aRv);

  void GetDescentOverride(nsACString& aResult);

  void SetDescentOverride(const nsACString& aValue, ErrorResult& aRv);

  void GetLineGapOverride(nsACString& aResult);

  void SetLineGapOverride(const nsACString& aValue, ErrorResult& aRv);

  void GetSizeAdjust(nsACString& aResult);

  void SetSizeAdjust(const nsACString& aValue, ErrorResult& aRv);

  FontFaceLoadStatus Status();

  Promise* Load(ErrorResult& aRv);

  Promise* GetLoaded(ErrorResult& aRv);

  FontFaceImpl* GetImpl() const { return mImpl; }

  void Destroy();

  void MaybeResolve();

  void MaybeReject(nsresult aResult);

 private:

  explicit FontFace(nsIGlobalObject* aParent);

  ~FontFace();

/**

   * Returns and takes ownership of the buffer storing the font data.

*/

  void TakeBuffer(uint8_t*& aBuffer, uint32_t& aLength);

  // Creates mLoaded if it doesn't already exist. It may immediately resolve or

  // reject mLoaded based on mStatus and mLoadedRejection.

  void EnsurePromise();

  RefPtr<FontFaceImpl> mImpl;

  // A Promise that is fulfilled once the font represented by this FontFace is

  // loaded, and is rejected if the load fails. This promise is created lazily

  // when JS asks for it.

  RefPtr<Promise> mLoaded;

  // Saves the rejection code for mLoaded if mLoaded hasn't been created yet.

  nsresult mLoadedRejection;

};

}  // namespace mozilla::dom

#endif  // !defined(mozilla_dom_FontFace_h)