Add m-esr52 at 52.6.0

1 files changed, 369 insertions, 0 deletions

diff --git a/layout/style/StyleRule.h b/layout/style/StyleRule.h
new file mode 100644
index 000000000..907e55448
--- /dev/null
+++ b/layout/style/StyleRule.h
@@ -0,0 +1,369 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/*
+ * representation of CSS style rules (selectors+declaration) and CSS
+ * selectors
+ */
+
+#ifndef mozilla_css_StyleRule_h__
+#define mozilla_css_StyleRule_h__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/css/Rule.h"
+
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsCSSPseudoElements.h"
+#include "nsIStyleRule.h"
+
+class nsIAtom;
+struct nsCSSSelectorList;
+
+namespace mozilla {
+enum class CSSPseudoClassType : uint8_t;
+class CSSStyleSheet;
+} // namespace mozilla
+
+struct nsAtomList {
+public:
+  explicit nsAtomList(nsIAtom* aAtom);
+  explicit nsAtomList(const nsString& aAtomValue);
+  ~nsAtomList(void);
+
+  /** Do a deep clone.  Should be used only on the first in the linked list. */
+  nsAtomList* Clone() const { return Clone(true); }
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  nsCOMPtr<nsIAtom> mAtom;
+  nsAtomList*       mNext;
+private:
+  nsAtomList* Clone(bool aDeep) const;
+
+  nsAtomList(const nsAtomList& aCopy) = delete;
+  nsAtomList& operator=(const nsAtomList& aCopy) = delete;
+};
+
+struct nsPseudoClassList {
+public:
+  typedef mozilla::CSSPseudoClassType CSSPseudoClassType;
+
+  explicit nsPseudoClassList(CSSPseudoClassType aType);
+  nsPseudoClassList(CSSPseudoClassType aType, const char16_t *aString);
+  nsPseudoClassList(CSSPseudoClassType aType, const int32_t *aIntPair);
+  nsPseudoClassList(CSSPseudoClassType aType,
+                    nsCSSSelectorList *aSelectorList /* takes ownership */);
+  ~nsPseudoClassList(void);
+
+  /** Do a deep clone.  Should be used only on the first in the linked list. */
+  nsPseudoClassList* Clone() const { return Clone(true); }
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  union {
+    // For a given value of mType, we have either:
+    //   a. no value, which means mMemory is always null
+    //      (if none of the conditions for (b), (c), or (d) is true)
+    //   b. a string value, which means mString/mMemory is non-null
+    //      (if nsCSSPseudoClasses::HasStringArg(mType))
+    //   c. an integer pair value, which means mNumbers/mMemory is non-null
+    //      (if nsCSSPseudoClasses::HasNthPairArg(mType))
+    //   d. a selector list, which means mSelectors is non-null
+    //      (if nsCSSPseudoClasses::HasSelectorListArg(mType))
+    void*           mMemory; // mString and mNumbers use moz_xmalloc/free
+    char16_t*       mString;
+    int32_t*        mNumbers;
+    nsCSSSelectorList* mSelectors;
+  } u;
+  CSSPseudoClassType mType;
+  nsPseudoClassList* mNext;
+private:
+  nsPseudoClassList* Clone(bool aDeep) const;
+
+  nsPseudoClassList(const nsPseudoClassList& aCopy) = delete;
+  nsPseudoClassList& operator=(const nsPseudoClassList& aCopy) = delete;
+};
+
+#define NS_ATTR_FUNC_SET        0     // [attr]
+#define NS_ATTR_FUNC_EQUALS     1     // [attr=value]
+#define NS_ATTR_FUNC_INCLUDES   2     // [attr~=value] (space separated)
+#define NS_ATTR_FUNC_DASHMATCH  3     // [attr|=value] ('-' truncated)
+#define NS_ATTR_FUNC_BEGINSMATCH  4   // [attr^=value] (begins with)
+#define NS_ATTR_FUNC_ENDSMATCH  5     // [attr$=value] (ends with)
+#define NS_ATTR_FUNC_CONTAINSMATCH 6  // [attr*=value] (contains substring)
+
+struct nsAttrSelector {
+public:
+  enum class ValueCaseSensitivity : uint8_t {
+    CaseSensitive,
+    CaseInsensitive,
+    CaseInsensitiveInHTML
+  };
+
+  nsAttrSelector(int32_t aNameSpace, const nsString& aAttr);
+  nsAttrSelector(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunction, 
+                 const nsString& aValue,
+                 ValueCaseSensitivity aValueCaseSensitivity);
+  nsAttrSelector(int32_t aNameSpace, nsIAtom* aLowercaseAttr, 
+                 nsIAtom* aCasedAttr, uint8_t aFunction, 
+                 const nsString& aValue,
+                 ValueCaseSensitivity aValueCaseSensitivity);
+  ~nsAttrSelector(void);
+
+  /** Do a deep clone.  Should be used only on the first in the linked list. */
+  nsAttrSelector* Clone() const { return Clone(true); }
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  bool IsValueCaseSensitive(bool aInHTML) const {
+    return mValueCaseSensitivity == ValueCaseSensitivity::CaseSensitive ||
+      (!aInHTML &&
+       mValueCaseSensitivity == ValueCaseSensitivity::CaseInsensitiveInHTML);
+  }
+
+  nsString        mValue;
+  nsAttrSelector* mNext;
+  nsCOMPtr<nsIAtom> mLowercaseAttr;
+  nsCOMPtr<nsIAtom> mCasedAttr;
+  int32_t         mNameSpace;
+  uint8_t         mFunction;
+  ValueCaseSensitivity mValueCaseSensitivity;
+
+private:
+  nsAttrSelector* Clone(bool aDeep) const;
+
+  nsAttrSelector(const nsAttrSelector& aCopy) = delete;
+  nsAttrSelector& operator=(const nsAttrSelector& aCopy) = delete;
+};
+
+struct nsCSSSelector {
+public:
+  typedef mozilla::CSSPseudoClassType CSSPseudoClassType;
+
+  nsCSSSelector(void);
+  ~nsCSSSelector(void);
+
+  /** Do a deep clone.  Should be used only on the first in the linked list. */
+  nsCSSSelector* Clone() const { return Clone(true, true); }
+
+  void Reset(void);
+  void SetNameSpace(int32_t aNameSpace);
+  void SetTag(const nsString& aTag);
+  void AddID(const nsString& aID);
+  void AddClass(const nsString& aClass);
+  void AddPseudoClass(CSSPseudoClassType aType);
+  void AddPseudoClass(CSSPseudoClassType aType, const char16_t* aString);
+  void AddPseudoClass(CSSPseudoClassType aType, const int32_t* aIntPair);
+  // takes ownership of aSelectorList
+  void AddPseudoClass(CSSPseudoClassType aType,
+                      nsCSSSelectorList* aSelectorList);
+  void AddAttribute(int32_t aNameSpace, const nsString& aAttr);
+  void AddAttribute(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunc,
+                    const nsString& aValue,
+                    nsAttrSelector::ValueCaseSensitivity aValueCaseSensitivity);
+  void SetOperator(char16_t aOperator);
+
+  inline bool HasTagSelector() const {
+    return !!mCasedTag;
+  }
+
+  inline bool IsPseudoElement() const {
+    return mLowercaseTag && !mCasedTag;
+  }
+
+  // Calculate the specificity of this selector (not including its mNext!).
+  int32_t CalcWeight() const;
+
+  void ToString(nsAString& aString, mozilla::CSSStyleSheet* aSheet,
+                bool aAppend = false) const;
+
+  bool IsRestrictedSelector() const {
+    return PseudoType() == mozilla::CSSPseudoElementType::NotPseudo;
+  }
+
+#ifdef DEBUG
+  nsCString RestrictedSelectorToString() const;
+#endif
+
+private:
+  void AddPseudoClassInternal(nsPseudoClassList *aPseudoClass);
+  nsCSSSelector* Clone(bool aDeepNext, bool aDeepNegations) const;
+
+  void AppendToStringWithoutCombinators(
+      nsAString& aString,
+      mozilla::CSSStyleSheet* aSheet,
+      bool aUseStandardNamespacePrefixes) const;
+  void AppendToStringWithoutCombinatorsOrNegations(
+      nsAString& aString,
+      mozilla::CSSStyleSheet* aSheet,
+      bool aIsNegated,
+      bool aUseStandardNamespacePrefixes) const;
+  // Returns true if this selector can have a namespace specified (which
+  // happens if and only if the default namespace would apply to this
+  // selector).
+  bool CanBeNamespaced(bool aIsNegated) const;
+  // Calculate the specificity of this selector (not including its mNext
+  // or its mNegations).
+  int32_t CalcWeightWithoutNegations() const;
+
+public:
+  // Get and set the selector's pseudo type
+  mozilla::CSSPseudoElementType PseudoType() const { return mPseudoType; }
+  void SetPseudoType(mozilla::CSSPseudoElementType aType) {
+    mPseudoType = aType;
+  }
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  // For case-sensitive documents, mLowercaseTag is the same as mCasedTag,
+  // but in case-insensitive documents (HTML) mLowercaseTag is lowercase.
+  // Also, for pseudo-elements mCasedTag will be null but mLowercaseTag
+  // contains their name.
+  nsCOMPtr<nsIAtom> mLowercaseTag;
+  nsCOMPtr<nsIAtom> mCasedTag;
+  nsAtomList*     mIDList;
+  nsAtomList*     mClassList;
+  nsPseudoClassList* mPseudoClassList; // atom for the pseudo, string for
+                                       // the argument to functional pseudos
+  nsAttrSelector* mAttrList;
+  nsCSSSelector*  mNegations;
+  nsCSSSelector*  mNext;
+  int32_t         mNameSpace;
+  char16_t       mOperator;
+private:
+  // The underlying type of CSSPseudoElementType is uint8_t and
+  // it packs well with mOperator. (char16_t + uint8_t is less than 32bits.)
+  mozilla::CSSPseudoElementType mPseudoType;
+
+  nsCSSSelector(const nsCSSSelector& aCopy) = delete;
+  nsCSSSelector& operator=(const nsCSSSelector& aCopy) = delete;
+};
+
+/**
+ * A selector list is the unit of selectors that each style rule has.
+ * For example, "P B, H1 B { ... }" would be a selector list with two
+ * items (where each |nsCSSSelectorList| object's |mSelectors| has
+ * an |mNext| for the P or H1).  We represent them as linked lists.
+ */
+class inDOMUtils;
+
+struct nsCSSSelectorList {
+  nsCSSSelectorList(void);
+  ~nsCSSSelectorList(void);
+
+  /**
+   * Create a new selector and push it onto the beginning of |mSelectors|,
+   * setting its |mNext| to the current value of |mSelectors|.  If there is an
+   * earlier selector, set its |mOperator| to |aOperator|; else |aOperator|
+   * must be char16_t(0).
+   * Returns the new selector.
+   * The list owns the new selector.
+   * The caller is responsible for updating |mWeight|.
+   */
+  nsCSSSelector* AddSelector(char16_t aOperator);
+
+  /**
+   * Point |mSelectors| to its |mNext|, and delete the first node in the old
+   * |mSelectors|.
+   * Should only be used on a list with more than one selector in it.
+   */
+  void RemoveRightmostSelector();
+
+  /**
+   * Should be used only on the first in the list
+   */
+  void ToString(nsAString& aResult, mozilla::CSSStyleSheet* aSheet);
+
+  /**
+   * Do a deep clone.  Should be used only on the first in the list.
+   */
+  nsCSSSelectorList* Clone() const { return Clone(true); }
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+  nsCSSSelector*     mSelectors;
+  int32_t            mWeight;
+  nsCSSSelectorList* mNext;
+protected:
+  friend class inDOMUtils;
+  nsCSSSelectorList* Clone(bool aDeep) const;
+
+private:
+  nsCSSSelectorList(const nsCSSSelectorList& aCopy) = delete;
+  nsCSSSelectorList& operator=(const nsCSSSelectorList& aCopy) = delete;
+};
+
+// 464bab7a-2fce-4f30-ab44-b7a5f3aae57d
+#define NS_CSS_STYLE_RULE_IMPL_CID \
+{ 0x464bab7a, 0x2fce, 0x4f30, \
+  { 0xab, 0x44, 0xb7, 0xa5, 0xf3, 0xaa, 0xe5, 0x7d } }
+
+namespace mozilla {
+namespace css {
+
+class Declaration;
+class DOMCSSStyleRule;
+
+class StyleRule final : public Rule
+{
+ public:
+  StyleRule(nsCSSSelectorList* aSelector,
+            Declaration *aDeclaration,
+            uint32_t aLineNumber, uint32_t aColumnNumber);
+private:
+  // for |Clone|
+  StyleRule(const StyleRule& aCopy);
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_RULE_IMPL_CID)
+
+  NS_DECL_ISUPPORTS
+
+  // null for style attribute
+  nsCSSSelectorList* Selector() { return mSelector; }
+
+  Declaration* GetDeclaration() const { return mDeclaration; }
+
+  void SetDeclaration(Declaration* aDecl);
+
+  // hooks for DOM rule
+  void GetCssText(nsAString& aCssText);
+  void SetCssText(const nsAString& aCssText);
+  void GetSelectorText(nsAString& aSelectorText);
+  void SetSelectorText(const nsAString& aSelectorText);
+
+  virtual int32_t GetType() const override;
+
+  virtual already_AddRefed<Rule> Clone() const override;
+
+  virtual nsIDOMCSSRule* GetDOMRule() override;
+
+  virtual nsIDOMCSSRule* GetExistingDOMRule() override;
+
+#ifdef DEBUG
+  virtual void List(FILE* out = stdout, int32_t aIndent = 0) const override;
+#endif
+
+  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
+
+private:
+  ~StyleRule();
+
+private:
+  nsCSSSelectorList*      mSelector; // null for style attribute
+  RefPtr<Declaration>     mDeclaration;
+  RefPtr<DOMCSSStyleRule> mDOMRule;
+
+private:
+  StyleRule& operator=(const StyleRule& aCopy) = delete;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(StyleRule, NS_CSS_STYLE_RULE_IMPL_CID)
+
+} // namespace css
+} // namespace mozilla
+
+#endif /* mozilla_css_StyleRule_h__ */