layout/style/nsHTMLStyleSheet.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   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 nsHTMLStyleSheet_h_
  13 #define nsHTMLStyleSheet_h_
  14
  15 #include "nsAutoPtr.h"
  16 #include "nsColor.h"
  17 #include "nsCOMPtr.h"
  18 #include "nsIStyleRule.h"
  19 #include "nsIStyleRuleProcessor.h"
  20 #include "pldhash.h"
  21 #include "mozilla/Attributes.h"
  22 #include "mozilla/MemoryReporting.h"
  23 #include "nsString.h"
  24
  25 class nsIDocument;
  26 class nsMappedAttributes;
  27
  28 class nsHTMLStyleSheet MOZ_FINAL : public nsIStyleRuleProcessor
  29 {
  30 public:
  31   explicit nsHTMLStyleSheet(nsIDocument* aDocument);
  32
  33   void SetOwningDocument(nsIDocument* aDocument);
  34
  35   NS_DECL_ISUPPORTS
  36
  37   // nsIStyleRuleProcessor API
  38   virtual void RulesMatching(ElementRuleProcessorData* aData) MOZ_OVERRIDE;
  39   virtual void RulesMatching(PseudoElementRuleProcessorData* aData) MOZ_OVERRIDE;
  40   virtual void RulesMatching(AnonBoxRuleProcessorData* aData) MOZ_OVERRIDE;
  41 #ifdef MOZ_XUL
  42   virtual void RulesMatching(XULTreeRuleProcessorData* aData) MOZ_OVERRIDE;
  43 #endif
  44   virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
  45   virtual nsRestyleHint HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) MOZ_OVERRIDE;
  46   virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
  47   virtual nsRestyleHint
  48     HasAttributeDependentStyle(AttributeRuleProcessorData* aData) MOZ_OVERRIDE;
  49   virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) MOZ_OVERRIDE;
  50   virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
  51     const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
  52   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
  53     const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
  54   size_t DOMSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
  55
  56   void Reset();
  57   nsresult SetLinkColor(nscolor aColor);
  58   nsresult SetActiveLinkColor(nscolor aColor);
  59   nsresult SetVisitedLinkColor(nscolor aColor);
  60
  61   // Mapped Attribute management methods
  62   already_AddRefed<nsMappedAttributes>
  63     UniqueMappedAttributes(nsMappedAttributes* aMapped);
  64   void DropMappedAttributes(nsMappedAttributes* aMapped);
  65
  66   nsIStyleRule* LangRuleFor(const nsString& aLanguage);
  67
  68 private:
  69   nsHTMLStyleSheet(const nsHTMLStyleSheet& aCopy) = delete;
  70   nsHTMLStyleSheet& operator=(const nsHTMLStyleSheet& aCopy) = delete;
  71
  72   ~nsHTMLStyleSheet();
  73
  74   class HTMLColorRule;
  75   friend class HTMLColorRule;
  76   class HTMLColorRule MOZ_FINAL : public nsIStyleRule {
  77   private:
  78     ~HTMLColorRule() {}
  79   public:
  80     HTMLColorRule() {}
  81
  82     NS_DECL_ISUPPORTS
  83
  84     // nsIStyleRule interface
  85     virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
  86   #ifdef DEBUG
  87     virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
  88   #endif
  89
  90     nscolor             mColor;
  91   };
  92
  93   // Implementation of SetLink/VisitedLink/ActiveLinkColor
  94   nsresult ImplLinkColorSetter(nsRefPtr<HTMLColorRule>& aRule, nscolor aColor);
  95
  96   class GenericTableRule;
  97   friend class GenericTableRule;
  98   class GenericTableRule : public nsIStyleRule {
  99   protected:
 100     virtual ~GenericTableRule() {}
 101   public:
 102     GenericTableRule() {}
 103
 104     NS_DECL_ISUPPORTS
 105
 106     // nsIStyleRule interface
 107     virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE = 0;
 108   #ifdef DEBUG
 109     virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
 110   #endif
 111   };
 112
 113   // this rule handles <th> inheritance
 114   class TableTHRule;
 115   friend class TableTHRule;
 116   class TableTHRule MOZ_FINAL : public GenericTableRule {
 117   public:
 118     TableTHRule() {}
 119
 120     virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
 121   };
 122
 123   // Rule to handle quirk table colors
 124   class TableQuirkColorRule MOZ_FINAL : public GenericTableRule {
 125   public:
 126     TableQuirkColorRule() {}
 127
 128     virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
 129   };
 130
 131 public: // for mLangRuleTable structures only
 132
 133   // Rule to handle xml:lang attributes, of which we have exactly one
 134   // per language string, maintained in mLangRuleTable.
 135   class LangRule MOZ_FINAL : public nsIStyleRule {
 136   private:
 137     ~LangRule() {}
 138   public:
 139     explicit LangRule(const nsSubstring& aLang) : mLang(aLang) {}
 140
 141     NS_DECL_ISUPPORTS
 142
 143     // nsIStyleRule interface
 144     virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
 145   #ifdef DEBUG
 146     virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
 147   #endif
 148
 149     nsString mLang;
 150   };
 151
 152 private:
 153   nsIDocument*            mDocument;
 154   nsRefPtr<HTMLColorRule> mLinkRule;
 155   nsRefPtr<HTMLColorRule> mVisitedRule;
 156   nsRefPtr<HTMLColorRule> mActiveRule;
 157   nsRefPtr<TableQuirkColorRule> mTableQuirkColorRule;
 158   nsRefPtr<TableTHRule>   mTableTHRule;
 159
 160   PLDHashTable            mMappedAttrTable;
 161   PLDHashTable            mLangRuleTable;
 162 };
 163
 164 #endif /* !defined(nsHTMLStyleSheet_h_) */