370 lines
12 KiB
C++
370 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* representation of CSS style rules (selectors+declaration) and CSS
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* selectors
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*/
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#ifndef mozilla_css_StyleRule_h__
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#define mozilla_css_StyleRule_h__
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#include "mozilla/Attributes.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/css/Rule.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsCSSPseudoElements.h"
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#include "nsIStyleRule.h"
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class nsIAtom;
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struct nsCSSSelectorList;
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namespace mozilla {
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enum class CSSPseudoClassType : uint8_t;
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class CSSStyleSheet;
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} // namespace mozilla
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struct nsAtomList {
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public:
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explicit nsAtomList(nsIAtom* aAtom);
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explicit nsAtomList(const nsString& aAtomValue);
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~nsAtomList(void);
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/** Do a deep clone. Should be used only on the first in the linked list. */
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nsAtomList* Clone() const { return Clone(true); }
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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nsCOMPtr<nsIAtom> mAtom;
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nsAtomList* mNext;
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private:
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nsAtomList* Clone(bool aDeep) const;
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nsAtomList(const nsAtomList& aCopy) = delete;
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nsAtomList& operator=(const nsAtomList& aCopy) = delete;
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};
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struct nsPseudoClassList {
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public:
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typedef mozilla::CSSPseudoClassType CSSPseudoClassType;
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explicit nsPseudoClassList(CSSPseudoClassType aType);
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nsPseudoClassList(CSSPseudoClassType aType, const char16_t *aString);
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nsPseudoClassList(CSSPseudoClassType aType, const int32_t *aIntPair);
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nsPseudoClassList(CSSPseudoClassType aType,
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nsCSSSelectorList *aSelectorList /* takes ownership */);
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~nsPseudoClassList(void);
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/** Do a deep clone. Should be used only on the first in the linked list. */
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nsPseudoClassList* Clone() const { return Clone(true); }
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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union {
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// For a given value of mType, we have either:
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// a. no value, which means mMemory is always null
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// (if none of the conditions for (b), (c), or (d) is true)
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// b. a string value, which means mString/mMemory is non-null
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// (if nsCSSPseudoClasses::HasStringArg(mType))
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// c. an integer pair value, which means mNumbers/mMemory is non-null
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// (if nsCSSPseudoClasses::HasNthPairArg(mType))
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// d. a selector list, which means mSelectors is non-null
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// (if nsCSSPseudoClasses::HasSelectorListArg(mType))
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void* mMemory; // mString and mNumbers use moz_xmalloc/free
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char16_t* mString;
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int32_t* mNumbers;
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nsCSSSelectorList* mSelectors;
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} u;
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CSSPseudoClassType mType;
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nsPseudoClassList* mNext;
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private:
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nsPseudoClassList* Clone(bool aDeep) const;
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nsPseudoClassList(const nsPseudoClassList& aCopy) = delete;
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nsPseudoClassList& operator=(const nsPseudoClassList& aCopy) = delete;
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};
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#define NS_ATTR_FUNC_SET 0 // [attr]
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#define NS_ATTR_FUNC_EQUALS 1 // [attr=value]
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#define NS_ATTR_FUNC_INCLUDES 2 // [attr~=value] (space separated)
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#define NS_ATTR_FUNC_DASHMATCH 3 // [attr|=value] ('-' truncated)
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#define NS_ATTR_FUNC_BEGINSMATCH 4 // [attr^=value] (begins with)
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#define NS_ATTR_FUNC_ENDSMATCH 5 // [attr$=value] (ends with)
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#define NS_ATTR_FUNC_CONTAINSMATCH 6 // [attr*=value] (contains substring)
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struct nsAttrSelector {
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public:
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enum class ValueCaseSensitivity : uint8_t {
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CaseSensitive,
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CaseInsensitive,
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CaseInsensitiveInHTML
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};
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nsAttrSelector(int32_t aNameSpace, const nsString& aAttr);
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nsAttrSelector(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunction,
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const nsString& aValue,
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ValueCaseSensitivity aValueCaseSensitivity);
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nsAttrSelector(int32_t aNameSpace, nsIAtom* aLowercaseAttr,
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nsIAtom* aCasedAttr, uint8_t aFunction,
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const nsString& aValue,
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ValueCaseSensitivity aValueCaseSensitivity);
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~nsAttrSelector(void);
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/** Do a deep clone. Should be used only on the first in the linked list. */
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nsAttrSelector* Clone() const { return Clone(true); }
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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bool IsValueCaseSensitive(bool aInHTML) const {
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return mValueCaseSensitivity == ValueCaseSensitivity::CaseSensitive ||
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(!aInHTML &&
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mValueCaseSensitivity == ValueCaseSensitivity::CaseInsensitiveInHTML);
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}
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nsString mValue;
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nsAttrSelector* mNext;
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nsCOMPtr<nsIAtom> mLowercaseAttr;
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nsCOMPtr<nsIAtom> mCasedAttr;
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int32_t mNameSpace;
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uint8_t mFunction;
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ValueCaseSensitivity mValueCaseSensitivity;
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private:
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nsAttrSelector* Clone(bool aDeep) const;
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nsAttrSelector(const nsAttrSelector& aCopy) = delete;
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nsAttrSelector& operator=(const nsAttrSelector& aCopy) = delete;
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};
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struct nsCSSSelector {
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public:
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typedef mozilla::CSSPseudoClassType CSSPseudoClassType;
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nsCSSSelector(void);
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~nsCSSSelector(void);
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/** Do a deep clone. Should be used only on the first in the linked list. */
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nsCSSSelector* Clone() const { return Clone(true, true); }
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void Reset(void);
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void SetNameSpace(int32_t aNameSpace);
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void SetTag(const nsString& aTag);
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void AddID(const nsString& aID);
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void AddClass(const nsString& aClass);
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void AddPseudoClass(CSSPseudoClassType aType);
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void AddPseudoClass(CSSPseudoClassType aType, const char16_t* aString);
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void AddPseudoClass(CSSPseudoClassType aType, const int32_t* aIntPair);
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// takes ownership of aSelectorList
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void AddPseudoClass(CSSPseudoClassType aType,
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nsCSSSelectorList* aSelectorList);
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void AddAttribute(int32_t aNameSpace, const nsString& aAttr);
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void AddAttribute(int32_t aNameSpace, const nsString& aAttr, uint8_t aFunc,
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const nsString& aValue,
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nsAttrSelector::ValueCaseSensitivity aValueCaseSensitivity);
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void SetOperator(char16_t aOperator);
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inline bool HasTagSelector() const {
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return !!mCasedTag;
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}
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inline bool IsPseudoElement() const {
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return mLowercaseTag && !mCasedTag;
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}
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// Calculate the specificity of this selector (not including its mNext!).
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int32_t CalcWeight() const;
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void ToString(nsAString& aString, mozilla::CSSStyleSheet* aSheet,
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bool aAppend = false) const;
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bool IsRestrictedSelector() const {
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return PseudoType() == mozilla::CSSPseudoElementType::NotPseudo;
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}
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#ifdef DEBUG
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nsCString RestrictedSelectorToString() const;
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#endif
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private:
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void AddPseudoClassInternal(nsPseudoClassList *aPseudoClass);
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nsCSSSelector* Clone(bool aDeepNext, bool aDeepNegations) const;
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void AppendToStringWithoutCombinators(
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nsAString& aString,
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mozilla::CSSStyleSheet* aSheet,
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bool aUseStandardNamespacePrefixes) const;
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void AppendToStringWithoutCombinatorsOrNegations(
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nsAString& aString,
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mozilla::CSSStyleSheet* aSheet,
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bool aIsNegated,
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bool aUseStandardNamespacePrefixes) const;
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// Returns true if this selector can have a namespace specified (which
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// happens if and only if the default namespace would apply to this
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// selector).
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bool CanBeNamespaced(bool aIsNegated) const;
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// Calculate the specificity of this selector (not including its mNext
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// or its mNegations).
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int32_t CalcWeightWithoutNegations() const;
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public:
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// Get and set the selector's pseudo type
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mozilla::CSSPseudoElementType PseudoType() const { return mPseudoType; }
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void SetPseudoType(mozilla::CSSPseudoElementType aType) {
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mPseudoType = aType;
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}
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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// For case-sensitive documents, mLowercaseTag is the same as mCasedTag,
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// but in case-insensitive documents (HTML) mLowercaseTag is lowercase.
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// Also, for pseudo-elements mCasedTag will be null but mLowercaseTag
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// contains their name.
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nsCOMPtr<nsIAtom> mLowercaseTag;
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nsCOMPtr<nsIAtom> mCasedTag;
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nsAtomList* mIDList;
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nsAtomList* mClassList;
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nsPseudoClassList* mPseudoClassList; // atom for the pseudo, string for
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// the argument to functional pseudos
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nsAttrSelector* mAttrList;
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nsCSSSelector* mNegations;
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nsCSSSelector* mNext;
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int32_t mNameSpace;
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char16_t mOperator;
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private:
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// The underlying type of CSSPseudoElementType is uint8_t and
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// it packs well with mOperator. (char16_t + uint8_t is less than 32bits.)
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mozilla::CSSPseudoElementType mPseudoType;
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nsCSSSelector(const nsCSSSelector& aCopy) = delete;
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nsCSSSelector& operator=(const nsCSSSelector& aCopy) = delete;
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};
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/**
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* A selector list is the unit of selectors that each style rule has.
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* For example, "P B, H1 B { ... }" would be a selector list with two
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* items (where each |nsCSSSelectorList| object's |mSelectors| has
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* an |mNext| for the P or H1). We represent them as linked lists.
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*/
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class inDOMUtils;
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struct nsCSSSelectorList {
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nsCSSSelectorList(void);
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~nsCSSSelectorList(void);
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/**
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* Create a new selector and push it onto the beginning of |mSelectors|,
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* setting its |mNext| to the current value of |mSelectors|. If there is an
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* earlier selector, set its |mOperator| to |aOperator|; else |aOperator|
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* must be char16_t(0).
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* Returns the new selector.
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* The list owns the new selector.
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* The caller is responsible for updating |mWeight|.
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*/
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nsCSSSelector* AddSelector(char16_t aOperator);
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/**
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* Point |mSelectors| to its |mNext|, and delete the first node in the old
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* |mSelectors|.
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* Should only be used on a list with more than one selector in it.
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*/
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void RemoveRightmostSelector();
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/**
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* Should be used only on the first in the list
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*/
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void ToString(nsAString& aResult, mozilla::CSSStyleSheet* aSheet);
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/**
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* Do a deep clone. Should be used only on the first in the list.
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*/
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nsCSSSelectorList* Clone() const { return Clone(true); }
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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nsCSSSelector* mSelectors;
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int32_t mWeight;
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nsCSSSelectorList* mNext;
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protected:
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friend class inDOMUtils;
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nsCSSSelectorList* Clone(bool aDeep) const;
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private:
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nsCSSSelectorList(const nsCSSSelectorList& aCopy) = delete;
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nsCSSSelectorList& operator=(const nsCSSSelectorList& aCopy) = delete;
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};
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// 464bab7a-2fce-4f30-ab44-b7a5f3aae57d
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#define NS_CSS_STYLE_RULE_IMPL_CID \
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{ 0x464bab7a, 0x2fce, 0x4f30, \
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{ 0xab, 0x44, 0xb7, 0xa5, 0xf3, 0xaa, 0xe5, 0x7d } }
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namespace mozilla {
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namespace css {
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class Declaration;
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class DOMCSSStyleRule;
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class StyleRule final : public Rule
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{
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public:
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StyleRule(nsCSSSelectorList* aSelector,
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Declaration *aDeclaration,
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uint32_t aLineNumber, uint32_t aColumnNumber);
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private:
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// for |Clone|
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StyleRule(const StyleRule& aCopy);
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_RULE_IMPL_CID)
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NS_DECL_ISUPPORTS
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// null for style attribute
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nsCSSSelectorList* Selector() { return mSelector; }
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Declaration* GetDeclaration() const { return mDeclaration; }
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void SetDeclaration(Declaration* aDecl);
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// hooks for DOM rule
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void GetCssText(nsAString& aCssText);
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void SetCssText(const nsAString& aCssText);
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void GetSelectorText(nsAString& aSelectorText);
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void SetSelectorText(const nsAString& aSelectorText);
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virtual int32_t GetType() const override;
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virtual already_AddRefed<Rule> Clone() const override;
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virtual nsIDOMCSSRule* GetDOMRule() override;
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virtual nsIDOMCSSRule* GetExistingDOMRule() override;
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const override;
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#endif
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virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
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private:
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~StyleRule();
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private:
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nsCSSSelectorList* mSelector; // null for style attribute
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RefPtr<Declaration> mDeclaration;
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RefPtr<DOMCSSStyleRule> mDOMRule;
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private:
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StyleRule& operator=(const StyleRule& aCopy) = delete;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(StyleRule, NS_CSS_STYLE_RULE_IMPL_CID)
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} // namespace css
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} // namespace mozilla
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#endif /* mozilla_css_StyleRule_h__ */
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