layout/style/BindingStyleRule.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_BindingStyleRule_h__
   8 #define mozilla_BindingStyleRule_h__
   9
  10 #include "nscore.h"
  11 #include "nsString.h"
  12 #include "mozilla/css/Rule.h"
  13 #include "mozilla/NotNull.h"
  14
  15 /**
  16  * Shared superclass for mozilla::css::StyleRule and mozilla::ServoStyleRule,
  17  * for use from bindings code.
  18  */
  19
  20 class nsICSSDeclaration;
  21
  22 namespace mozilla {
  23 class DeclarationBlock;
  24 namespace dom {
  25 class Element;
  26 }
  27
  28 class BindingStyleRule : public css::Rule {
  29  protected:
  30   BindingStyleRule(StyleSheet* aSheet, css::Rule* aParentRule,
  31                    uint32_t aLineNumber, uint32_t aColumnNumber)
  32       : css::Rule(aSheet, aParentRule, aLineNumber, aColumnNumber) {}
  33   BindingStyleRule(const BindingStyleRule& aCopy) : css::Rule(aCopy) {}
  34   virtual ~BindingStyleRule() {}
  35
  36  public:
  37   // This is pure virtual because we have no members, and are an abstract class
  38   // to start with.  The fact that we have to have this declaration at all is
  39   // kinda dumb.  :(
  40   virtual size_t SizeOfIncludingThis(
  41       mozilla::MallocSizeOf aMallocSizeOf) const override MOZ_MUST_OVERRIDE = 0;
  42
  43   // Likewise for this one.  We have to override our superclass, but don't
  44   // really need to do anything in this method.
  45   virtual bool IsCCLeaf() const override MOZ_MUST_OVERRIDE = 0;
  46
  47   virtual uint32_t GetSelectorCount() = 0;
  48   virtual nsresult GetSelectorText(uint32_t aSelectorIndex,
  49                                    nsAString& aText) = 0;
  50   virtual nsresult GetSpecificity(uint32_t aSelectorIndex,
  51                                   uint64_t* aSpecificity) = 0;
  52   virtual nsresult SelectorMatchesElement(dom::Element* aElement,
  53                                           uint32_t aSelectorIndex,
  54                                           const nsAString& aPseudo,
  55                                           bool aRelevantLinkVisited,
  56                                           bool* aMatches) = 0;
  57   virtual NotNull<DeclarationBlock*> GetDeclarationBlock() const = 0;
  58
  59   // WebIDL API
  60   virtual void GetSelectorText(nsAString& aSelectorText) = 0;
  61   virtual void SetSelectorText(const nsAString& aSelectorText) = 0;
  62   virtual nsICSSDeclaration* Style() = 0;
  63
  64   virtual JSObject* WrapObject(JSContext* aCx,
  65                                JS::Handle<JSObject*> aGivenProto) override;
  66 };
  67
  68 }  // namespace mozilla
  69
  70 #endif  // mozilla_BindingStyleRule_h__