LCOV - code coverage report
Current view: directory - objdir/dist/include/mozilla/css - StyleRule.h (source / functions) Found Hit Coverage
Test: app.info Lines: 15 2 13.3 %
Date: 2012-06-02 Functions: 11 1 9.1 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Daniel Glazman <glazman@netscape.com>
      24                 :  *   L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : /*
      41                 :  * representation of CSS style rules (selectors+declaration) and CSS
      42                 :  * selectors
      43                 :  */
      44                 : 
      45                 : #ifndef mozilla_css_StyleRule_h__
      46                 : #define mozilla_css_StyleRule_h__
      47                 : 
      48                 : #include "mozilla/Attributes.h"
      49                 : 
      50                 : #include "mozilla/Attributes.h"
      51                 : #include "mozilla/css/Rule.h"
      52                 : 
      53                 : #include "nsString.h"
      54                 : #include "nsCOMPtr.h"
      55                 : #include "nsCSSPseudoElements.h"
      56                 : #include "nsCSSPseudoClasses.h"
      57                 : #include "nsAutoPtr.h"
      58                 : 
      59                 : class nsIAtom;
      60                 : class nsCSSStyleSheet;
      61                 : struct nsCSSSelectorList;
      62                 : class nsCSSCompressedDataBlock;
      63                 : 
      64                 : struct nsAtomList {
      65                 : public:
      66                 :   nsAtomList(nsIAtom* aAtom);
      67                 :   nsAtomList(const nsString& aAtomValue);
      68                 :   ~nsAtomList(void);
      69                 : 
      70                 :   /** Do a deep clone.  Should be used only on the first in the linked list. */
      71               0 :   nsAtomList* Clone() const { return Clone(true); }
      72                 : 
      73                 :   size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
      74                 : 
      75                 :   nsCOMPtr<nsIAtom> mAtom;
      76                 :   nsAtomList*       mNext;
      77                 : private: 
      78                 :   nsAtomList* Clone(bool aDeep) const;
      79                 : 
      80                 :   nsAtomList(const nsAtomList& aCopy) MOZ_DELETE;
      81                 :   nsAtomList& operator=(const nsAtomList& aCopy) MOZ_DELETE;
      82                 : };
      83                 : 
      84                 : struct nsPseudoClassList {
      85                 : public:
      86                 :   nsPseudoClassList(nsCSSPseudoClasses::Type aType);
      87                 :   nsPseudoClassList(nsCSSPseudoClasses::Type aType, const PRUnichar *aString);
      88                 :   nsPseudoClassList(nsCSSPseudoClasses::Type aType, const PRInt32 *aIntPair);
      89                 :   nsPseudoClassList(nsCSSPseudoClasses::Type aType,
      90                 :                     nsCSSSelectorList *aSelectorList /* takes ownership */);
      91                 :   ~nsPseudoClassList(void);
      92                 : 
      93                 :   /** Do a deep clone.  Should be used only on the first in the linked list. */
      94               0 :   nsPseudoClassList* Clone() const { return Clone(true); }
      95                 : 
      96                 :   size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
      97                 : 
      98                 :   union {
      99                 :     // For a given value of mType, we have either:
     100                 :     //   a. no value, which means mMemory is always null
     101                 :     //      (if none of the conditions for (b), (c), or (d) is true)
     102                 :     //   b. a string value, which means mString/mMemory is non-null
     103                 :     //      (if nsCSSPseudoClasses::HasStringArg(mType))
     104                 :     //   c. an integer pair value, which means mNumbers/mMemory is non-null
     105                 :     //      (if nsCSSPseudoClasses::HasNthPairArg(mType))
     106                 :     //   d. a selector list, which means mSelectors is non-null
     107                 :     //      (if nsCSSPseudoClasses::HasSelectorListArg(mType))
     108                 :     void*           mMemory; // mString and mNumbers use NS_Alloc/NS_Free
     109                 :     PRUnichar*      mString;
     110                 :     PRInt32*        mNumbers;
     111                 :     nsCSSSelectorList* mSelectors;
     112                 :   } u;
     113                 :   nsCSSPseudoClasses::Type mType;
     114                 :   nsPseudoClassList* mNext;
     115                 : private: 
     116                 :   nsPseudoClassList* Clone(bool aDeep) const;
     117                 : 
     118                 :   nsPseudoClassList(const nsPseudoClassList& aCopy) MOZ_DELETE;
     119                 :   nsPseudoClassList& operator=(const nsPseudoClassList& aCopy) MOZ_DELETE;
     120                 : };
     121                 : 
     122                 : #define NS_ATTR_FUNC_SET        0     // [attr]
     123                 : #define NS_ATTR_FUNC_EQUALS     1     // [attr=value]
     124                 : #define NS_ATTR_FUNC_INCLUDES   2     // [attr~=value] (space separated)
     125                 : #define NS_ATTR_FUNC_DASHMATCH  3     // [attr|=value] ('-' truncated)
     126                 : #define NS_ATTR_FUNC_BEGINSMATCH  4   // [attr^=value] (begins with)
     127                 : #define NS_ATTR_FUNC_ENDSMATCH  5     // [attr$=value] (ends with)
     128                 : #define NS_ATTR_FUNC_CONTAINSMATCH 6  // [attr*=value] (contains substring)
     129                 : 
     130                 : struct nsAttrSelector {
     131                 : public:
     132                 :   nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr);
     133                 :   nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunction, 
     134                 :                  const nsString& aValue, bool aCaseSensitive);
     135                 :   nsAttrSelector(PRInt32 aNameSpace, nsIAtom* aLowercaseAttr, 
     136                 :                  nsIAtom* aCasedAttr, PRUint8 aFunction, 
     137                 :                  const nsString& aValue, bool aCaseSensitive);
     138                 :   ~nsAttrSelector(void);
     139                 : 
     140                 :   /** Do a deep clone.  Should be used only on the first in the linked list. */
     141               0 :   nsAttrSelector* Clone() const { return Clone(true); }
     142                 : 
     143                 :   nsString        mValue;
     144                 :   nsAttrSelector* mNext;
     145                 :   nsCOMPtr<nsIAtom> mLowercaseAttr;
     146                 :   nsCOMPtr<nsIAtom> mCasedAttr;
     147                 :   PRInt32         mNameSpace;
     148                 :   PRUint8         mFunction;
     149                 :   bool            mCaseSensitive; // If we are in an HTML document,
     150                 :                                   // is the value case sensitive?
     151                 : private: 
     152                 :   nsAttrSelector* Clone(bool aDeep) const;
     153                 : 
     154                 :   nsAttrSelector(const nsAttrSelector& aCopy) MOZ_DELETE;
     155                 :   nsAttrSelector& operator=(const nsAttrSelector& aCopy) MOZ_DELETE;
     156                 : };
     157                 : 
     158                 : struct nsCSSSelector {
     159                 : public:
     160                 :   nsCSSSelector(void);
     161                 :   ~nsCSSSelector(void);
     162                 : 
     163                 :   /** Do a deep clone.  Should be used only on the first in the linked list. */
     164               0 :   nsCSSSelector* Clone() const { return Clone(true, true); }
     165                 : 
     166                 :   void Reset(void);
     167                 :   void SetNameSpace(PRInt32 aNameSpace);
     168                 :   void SetTag(const nsString& aTag);
     169                 :   void AddID(const nsString& aID);
     170                 :   void AddClass(const nsString& aClass);
     171                 :   void AddPseudoClass(nsCSSPseudoClasses::Type aType);
     172                 :   void AddPseudoClass(nsCSSPseudoClasses::Type aType, const PRUnichar* aString);
     173                 :   void AddPseudoClass(nsCSSPseudoClasses::Type aType, const PRInt32* aIntPair);
     174                 :   // takes ownership of aSelectorList
     175                 :   void AddPseudoClass(nsCSSPseudoClasses::Type aType,
     176                 :                       nsCSSSelectorList* aSelectorList);
     177                 :   void AddAttribute(PRInt32 aNameSpace, const nsString& aAttr);
     178                 :   void AddAttribute(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunc, 
     179                 :                     const nsString& aValue, bool aCaseSensitive);
     180                 :   void SetOperator(PRUnichar aOperator);
     181                 : 
     182                 :   inline bool HasTagSelector() const {
     183                 :     return !!mCasedTag;
     184                 :   }
     185                 : 
     186            3538 :   inline bool IsPseudoElement() const {
     187            3538 :     return mLowercaseTag && !mCasedTag;
     188                 :   }
     189                 : 
     190                 :   // Calculate the specificity of this selector (not including its mNext!).
     191                 :   PRInt32 CalcWeight() const;
     192                 : 
     193                 :   void ToString(nsAString& aString, nsCSSStyleSheet* aSheet,
     194                 :                 bool aAppend = false) const;
     195                 : 
     196                 : private:
     197                 :   void AddPseudoClassInternal(nsPseudoClassList *aPseudoClass);
     198                 :   nsCSSSelector* Clone(bool aDeepNext, bool aDeepNegations) const;
     199                 : 
     200                 :   void AppendToStringWithoutCombinators(nsAString& aString,
     201                 :                                         nsCSSStyleSheet* aSheet) const;
     202                 :   void AppendToStringWithoutCombinatorsOrNegations(nsAString& aString,
     203                 :                                                    nsCSSStyleSheet* aSheet,
     204                 :                                                    bool aIsNegated)
     205                 :                                                         const;
     206                 :   // Returns true if this selector can have a namespace specified (which
     207                 :   // happens if and only if the default namespace would apply to this
     208                 :   // selector).
     209                 :   bool CanBeNamespaced(bool aIsNegated) const;
     210                 :   // Calculate the specificity of this selector (not including its mNext
     211                 :   // or its mNegations).
     212                 :   PRInt32 CalcWeightWithoutNegations() const;
     213                 : 
     214                 : public:
     215                 :   // Get and set the selector's pseudo type
     216                 :   nsCSSPseudoElements::Type PseudoType() const {
     217                 :     return static_cast<nsCSSPseudoElements::Type>(mPseudoType);
     218                 :   }
     219               0 :   void SetPseudoType(nsCSSPseudoElements::Type aType) {
     220               0 :     NS_ASSERTION(aType > PR_INT16_MIN && aType < PR_INT16_MAX, "Out of bounds");
     221               0 :     mPseudoType = static_cast<PRInt16>(aType);
     222               0 :   }
     223                 : 
     224                 :   size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
     225                 : 
     226                 :   // For case-sensitive documents, mLowercaseTag is the same as mCasedTag,
     227                 :   // but in case-insensitive documents (HTML) mLowercaseTag is lowercase.
     228                 :   // Also, for pseudo-elements mCasedTag will be null but mLowercaseTag
     229                 :   // contains their name.
     230                 :   nsCOMPtr<nsIAtom> mLowercaseTag;
     231                 :   nsCOMPtr<nsIAtom> mCasedTag;
     232                 :   nsAtomList*     mIDList;
     233                 :   nsAtomList*     mClassList;
     234                 :   nsPseudoClassList* mPseudoClassList; // atom for the pseudo, string for
     235                 :                                        // the argument to functional pseudos
     236                 :   nsAttrSelector* mAttrList;
     237                 :   nsCSSSelector*  mNegations;
     238                 :   nsCSSSelector*  mNext;
     239                 :   PRInt32         mNameSpace;
     240                 :   PRUnichar       mOperator;
     241                 : private:
     242                 :   // PRInt16 to make sure it packs well with mOperator
     243                 :   PRInt16        mPseudoType;
     244                 : 
     245                 :   nsCSSSelector(const nsCSSSelector& aCopy) MOZ_DELETE;
     246                 :   nsCSSSelector& operator=(const nsCSSSelector& aCopy) MOZ_DELETE;
     247                 : };
     248                 : 
     249                 : /**
     250                 :  * A selector list is the unit of selectors that each style rule has.
     251                 :  * For example, "P B, H1 B { ... }" would be a selector list with two
     252                 :  * items (where each |nsCSSSelectorList| object's |mSelectors| has
     253                 :  * an |mNext| for the P or H1).  We represent them as linked lists.
     254                 :  */
     255                 : struct nsCSSSelectorList {
     256                 :   nsCSSSelectorList(void);
     257                 :   ~nsCSSSelectorList(void);
     258                 : 
     259                 :   /**
     260                 :    * Create a new selector and push it onto the beginning of |mSelectors|,
     261                 :    * setting its |mNext| to the current value of |mSelectors|.  If there is an
     262                 :    * earlier selector, set its |mOperator| to |aOperator|; else |aOperator|
     263                 :    * must be PRUnichar(0).
     264                 :    * Returns the new selector.
     265                 :    * The list owns the new selector.
     266                 :    * The caller is responsible for updating |mWeight|.
     267                 :    */
     268                 :   nsCSSSelector* AddSelector(PRUnichar aOperator);
     269                 : 
     270                 :   /**
     271                 :    * Should be used only on the first in the list
     272                 :    */
     273                 :   void ToString(nsAString& aResult, nsCSSStyleSheet* aSheet);
     274                 : 
     275                 :   /**
     276                 :    * Do a deep clone.  Should be used only on the first in the list.
     277                 :    */
     278               0 :   nsCSSSelectorList* Clone() const { return Clone(true); }
     279                 : 
     280                 :   size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
     281                 : 
     282                 :   nsCSSSelector*     mSelectors;
     283                 :   PRInt32            mWeight;
     284                 :   nsCSSSelectorList* mNext;
     285                 : private: 
     286                 :   nsCSSSelectorList* Clone(bool aDeep) const;
     287                 : 
     288                 :   nsCSSSelectorList(const nsCSSSelectorList& aCopy) MOZ_DELETE;
     289                 :   nsCSSSelectorList& operator=(const nsCSSSelectorList& aCopy) MOZ_DELETE;
     290                 : };
     291                 : 
     292                 : // 464bab7a-2fce-4f30-ab44-b7a5f3aae57d
     293                 : #define NS_CSS_STYLE_RULE_IMPL_CID \
     294                 : { 0x464bab7a, 0x2fce, 0x4f30, \
     295                 :   { 0xab, 0x44, 0xb7, 0xa5, 0xf3, 0xaa, 0xe5, 0x7d } }
     296                 : 
     297                 : namespace mozilla {
     298                 : namespace css {
     299                 : 
     300                 : class Declaration;
     301                 : class DOMCSSStyleRule;
     302                 : 
     303                 : class StyleRule;
     304                 : 
     305                 : class ImportantRule : public nsIStyleRule {
     306                 : public:
     307                 :   ImportantRule(Declaration *aDeclaration);
     308                 : 
     309                 :   NS_DECL_ISUPPORTS
     310                 : 
     311                 :   // nsIStyleRule interface
     312                 :   virtual void MapRuleInfoInto(nsRuleData* aRuleData);
     313                 : #ifdef DEBUG
     314                 :   virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
     315                 : #endif
     316                 : 
     317                 : protected:
     318                 :   virtual ~ImportantRule();
     319                 : 
     320                 :   // Not an owning reference; the StyleRule that owns this
     321                 :   // ImportantRule also owns the mDeclaration, and any rule node
     322                 :   // pointing to this rule keeps that StyleRule alive as well.
     323                 :   Declaration* mDeclaration;
     324                 : 
     325                 :   friend class StyleRule;
     326                 : };
     327                 : 
     328                 : class StyleRule MOZ_FINAL : public Rule
     329                 : {
     330                 :  public:
     331                 :   StyleRule(nsCSSSelectorList* aSelector,
     332                 :             Declaration *aDeclaration);
     333                 : private:
     334                 :   // for |Clone|
     335                 :   StyleRule(const StyleRule& aCopy);
     336                 :   // for |DeclarationChanged|
     337                 :   StyleRule(StyleRule& aCopy,
     338                 :             Declaration *aDeclaration);
     339                 : public:
     340                 :   NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_RULE_IMPL_CID)
     341                 : 
     342                 :   NS_DECL_ISUPPORTS_INHERITED
     343                 : 
     344                 :   // null for style attribute
     345                 :   nsCSSSelectorList* Selector() { return mSelector; }
     346                 : 
     347               0 :   PRUint32 GetLineNumber() const { return mLineNumber; }
     348               0 :   void SetLineNumber(PRUint32 aLineNumber) { mLineNumber = aLineNumber; }
     349                 : 
     350               0 :   Declaration* GetDeclaration() const { return mDeclaration; }
     351                 : 
     352                 :   /**
     353                 :    * Return a new |nsIStyleRule| instance that replaces the current
     354                 :    * one, with |aDecl| replacing the previous declaration. Due to the
     355                 :    * |nsIStyleRule| contract of immutability, this must be called if
     356                 :    * the declaration is modified.
     357                 :    *
     358                 :    * |DeclarationChanged| handles replacing the object in the container
     359                 :    * sheet or group rule if |aHandleContainer| is true.
     360                 :    */
     361                 :   already_AddRefed<StyleRule>
     362                 :   DeclarationChanged(Declaration* aDecl, bool aHandleContainer);
     363                 : 
     364               0 :   nsIStyleRule* GetImportantRule() const { return mImportantRule; }
     365                 : 
     366                 :   /**
     367                 :    * The rule processor must call this method before calling
     368                 :    * nsRuleWalker::Forward on this rule during rule matching.
     369                 :    */
     370                 :   void RuleMatched();
     371                 : 
     372                 :   // hooks for DOM rule
     373                 :   void GetCssText(nsAString& aCssText);
     374                 :   void SetCssText(const nsAString& aCssText);
     375                 :   void GetSelectorText(nsAString& aSelectorText);
     376                 :   void SetSelectorText(const nsAString& aSelectorText);
     377                 : 
     378                 :   virtual PRInt32 GetType() const;
     379                 : 
     380                 :   virtual already_AddRefed<Rule> Clone() const;
     381                 : 
     382                 :   virtual nsIDOMCSSRule* GetDOMRule();
     383                 : 
     384                 :   // The new mapping function.
     385                 :   virtual void MapRuleInfoInto(nsRuleData* aRuleData);
     386                 : 
     387                 : #ifdef DEBUG
     388                 :   virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
     389                 : #endif
     390                 : 
     391                 :   virtual size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
     392                 : 
     393                 : private:
     394                 :   ~StyleRule();
     395                 : 
     396                 : private:
     397                 :   nsCSSSelectorList*      mSelector; // null for style attribute
     398                 :   Declaration*            mDeclaration;
     399                 :   ImportantRule*          mImportantRule; // initialized by RuleMatched
     400                 :   DOMCSSStyleRule*        mDOMRule;
     401                 :   // Keep the same type so that MSVC packs them.
     402                 :   PRUint32                mLineNumber : 31;
     403                 :   PRUint32                mWasMatched : 1;
     404                 : 
     405                 : private:
     406                 :   StyleRule& operator=(const StyleRule& aCopy) MOZ_DELETE;
     407                 : };
     408                 : 
     409                 : } // namespace css
     410                 : } // namespace mozilla
     411                 : 
     412                 : NS_DEFINE_STATIC_IID_ACCESSOR(mozilla::css::StyleRule, NS_CSS_STYLE_RULE_IMPL_CID)
     413                 : 
     414                 : #endif /* mozilla_css_StyleRule_h__ */

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