layout/style/CSSFontFaceRule.h
author Nika Layzell <nika@thelayzells.com>
Tue, 25 Sep 2018 17:34:53 +0200
changeset 507828 5e6dae0c1e5a4939ccd406f14607f7fafffd45a7
parent 482335 8fb94a730b6c42d4dd0c9c76a2b2d697bb4b6025
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1448426 - Wrap windows.h to avoid problematic define statements, r=froydnj,glandium By default, windows.h exposes a large number of problematic define statements which are UpperCamelCase, such as a define from `CreateWindow` to `CreateWindow{A,W}`. As many of these names are generic (e.g. CreateFile, CreateWindow), they can mess up Gecko code that may legitimately have its own methods with the same names. The header also defines some traditional SCREAMING_SNAKE_CASE defines which can mess up our code by conflicting with local values. This patch adds a simple code generator which generates wrappers for these defines, and uses them to wrap the windows.h wrapper using the `stl_wrappers` mechanism, allowing us to use windows.h in more places. Differential Revision: https://phabricator.services.mozilla.com/D10932

/* -*- 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_CSSFontFaceRule_h
#define mozilla_CSSFontFaceRule_h

#include "mozilla/ServoBindingTypes.h"
#include "mozilla/css/Rule.h"
#include "nsICSSDeclaration.h"

namespace mozilla {
namespace dom {


// A CSSFontFaceRuleDecl is always embeded in a CSSFontFaceRule.
class CSSFontFaceRule;
class CSSFontFaceRuleDecl final : public nsICSSDeclaration
{
public:
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_NSIDOMCSSSTYLEDECLARATION_HELPER

  nsINode* GetParentObject() final;
  void IndexedGetter(uint32_t aIndex, bool& aFound, nsAString& aPropName) final;

  void GetPropertyValue(nsCSSFontDesc aFontDescID, nsAString& aResult) const;

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

protected:
  // For accessing the constructor.
  friend class CSSFontFaceRule;

  explicit CSSFontFaceRuleDecl(already_AddRefed<RawServoFontFaceRule> aDecl)
    : mRawRule(std::move(aDecl)) {}

  ~CSSFontFaceRuleDecl() = default;

  inline CSSFontFaceRule* ContainingRule();
  inline const CSSFontFaceRule* ContainingRule() const;

  RefPtr<RawServoFontFaceRule> mRawRule;

private:
  void* operator new(size_t size) CPP_THROW_NEW = delete;
};

class CSSFontFaceRule final : public css::Rule
{
public:
  CSSFontFaceRule(already_AddRefed<RawServoFontFaceRule> aRawRule,
                  StyleSheet* aSheet,
                  css::Rule* aParentRule,
                  uint32_t aLine,
                  uint32_t aColumn)
    : css::Rule(aSheet, aParentRule, aLine, aColumn)
    , mDecl(std::move(aRawRule))
  {}

  CSSFontFaceRule(const CSSFontFaceRule&) = delete;

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(
      CSSFontFaceRule, css::Rule)
  bool IsCCLeaf() const final;

  RawServoFontFaceRule* Raw() const { return mDecl.mRawRule; }

  // WebIDL interface
  uint16_t Type() const final;
  void GetCssText(nsAString& aCssText) const final;
  nsICSSDeclaration* Style();

  // Methods of mozilla::css::Rule
  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
    const final;

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

#ifdef DEBUG
  void List(FILE* out = stdout, int32_t aIndent = 0) const final;
#endif

private:
  virtual ~CSSFontFaceRule() = default;

  // For computing the offset of mDecl.
  friend class CSSFontFaceRuleDecl;

  CSSFontFaceRuleDecl mDecl;
};

inline CSSFontFaceRule*
CSSFontFaceRuleDecl::ContainingRule()
{
  return reinterpret_cast<CSSFontFaceRule*>
    (reinterpret_cast<char*>(this) - offsetof(CSSFontFaceRule, mDecl));
}

inline const CSSFontFaceRule*
CSSFontFaceRuleDecl::ContainingRule() const
{
  return reinterpret_cast<const CSSFontFaceRule*>
    (reinterpret_cast<const char*>(this) - offsetof(CSSFontFaceRule, mDecl));
}

} // namespace dom
} // namespace mozilla

#endif // mozilla_CSSFontFaceRule_h