layout/style/AttributeStyles.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 /*
   8  * style sheet and style rule processor representing data from presentational
   9  * HTML attributes
  10  */
  11
  12 #ifndef mozilla_AttributeStyles_h_
  13 #define mozilla_AttributeStyles_h_
  14
  15 #include "nsColor.h"
  16 #include "nsCOMPtr.h"
  17 #include "nsAtom.h"
  18 #include "PLDHashTable.h"
  19 #include "mozilla/Attributes.h"
  20 #include "mozilla/MemoryReporting.h"
  21 #include "nsTHashMap.h"
  22 #include "nsString.h"
  23
  24 struct MiscContainer;
  25 namespace mozilla {
  26 struct StyleLockedDeclarationBlock;
  27 namespace dom {
  28 class Document;
  29 }  // namespace dom
  30
  31 class AttributeStyles final {
  32  public:
  33   explicit AttributeStyles(dom::Document* aDocument);
  34   void SetOwningDocument(dom::Document* aDocument);
  35
  36   NS_INLINE_DECL_REFCOUNTING(AttributeStyles)
  37
  38   size_t DOMSizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
  39
  40   void Reset();
  41   nsresult SetLinkColor(nscolor aColor);
  42   nsresult SetActiveLinkColor(nscolor aColor);
  43   nsresult SetVisitedLinkColor(nscolor aColor);
  44
  45   const StyleLockedDeclarationBlock* GetServoUnvisitedLinkDecl() const {
  46     return mServoUnvisitedLinkDecl;
  47   }
  48   const StyleLockedDeclarationBlock* GetServoVisitedLinkDecl() const {
  49     return mServoVisitedLinkDecl;
  50   }
  51   const StyleLockedDeclarationBlock* GetServoActiveLinkDecl() const {
  52     return mServoActiveLinkDecl;
  53   }
  54
  55   void CacheStyleAttr(const nsAString& aSerialized, MiscContainer* aValue) {
  56     mCachedStyleAttrs.InsertOrUpdate(aSerialized, aValue);
  57   }
  58   void EvictStyleAttr(const nsAString& aSerialized, MiscContainer* aValue) {
  59     NS_ASSERTION(LookupStyleAttr(aSerialized) == aValue,
  60                  "Cached value doesn't match?");
  61     mCachedStyleAttrs.Remove(aSerialized);
  62   }
  63   MiscContainer* LookupStyleAttr(const nsAString& aSerialized) {
  64     return mCachedStyleAttrs.Get(aSerialized);
  65   }
  66
  67   AttributeStyles(const AttributeStyles& aCopy) = delete;
  68   AttributeStyles& operator=(const AttributeStyles& aCopy) = delete;
  69
  70  private:
  71   ~AttributeStyles();
  72
  73   // Implementation of SetLink/VisitedLink/ActiveLinkColor
  74   nsresult ImplLinkColorSetter(RefPtr<StyleLockedDeclarationBlock>& aDecl,
  75                                nscolor aColor);
  76
  77   dom::Document* mDocument;
  78   RefPtr<StyleLockedDeclarationBlock> mServoUnvisitedLinkDecl;
  79   RefPtr<StyleLockedDeclarationBlock> mServoVisitedLinkDecl;
  80   RefPtr<StyleLockedDeclarationBlock> mServoActiveLinkDecl;
  81   nsTHashMap<nsStringHashKey, MiscContainer*> mCachedStyleAttrs;
  82 };
  83
  84 }  // namespace mozilla
  85
  86 #endif