LCOV - code coverage report
Current view: directory - objdir/dist/include - nsRuleWalker.h (source / functions) Found Hit Coverage
Test: app.info Lines: 12 0 0.0 %
Date: 2012-06-02 Functions: 3 0 0.0 %

       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 Communicator client 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                 :  *   Original Author: David W. Hyatt (hyatt@netscape.com)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : /*
      40                 :  * a class that walks the lexicographic tree of rule nodes as style
      41                 :  * rules are matched
      42                 :  */
      43                 : 
      44                 : #ifndef nsRuleWalker_h_
      45                 : #define nsRuleWalker_h_
      46                 : 
      47                 : #include "nsRuleNode.h"
      48                 : #include "nsIStyleRule.h"
      49                 : #include "StyleRule.h"
      50                 : 
      51                 : class nsRuleWalker {
      52                 : public:
      53                 :   nsRuleNode* CurrentNode() { return mCurrent; }
      54                 :   void SetCurrentNode(nsRuleNode* aNode) {
      55                 :     NS_ASSERTION(aNode, "Must have node here!");
      56                 :     mCurrent = aNode;
      57                 :   }
      58                 : 
      59                 : protected:
      60               0 :   void DoForward(nsIStyleRule* aRule) {
      61               0 :     mCurrent = mCurrent->Transition(aRule, mLevel, mImportance);
      62               0 :     NS_POSTCONDITION(mCurrent, "Transition messed up");
      63               0 :   }
      64                 : 
      65                 : public:
      66               0 :   void Forward(nsIStyleRule* aRule) {
      67               0 :     NS_PRECONDITION(!nsRefPtr<mozilla::css::StyleRule>(do_QueryObject(aRule)),
      68                 :                     "Calling the wrong Forward() overload");
      69               0 :     DoForward(aRule);
      70               0 :   }
      71               0 :   void Forward(mozilla::css::StyleRule* aRule) {
      72               0 :     DoForward(aRule);
      73                 :     mCheckForImportantRules =
      74               0 :       mCheckForImportantRules && !aRule->GetImportantRule();
      75               0 :   }
      76                 :   // ForwardOnPossiblyCSSRule should only be used by callers that have
      77                 :   // an explicit list of rules they need to walk, with the list
      78                 :   // already containing any important rules they care about.
      79                 :   void ForwardOnPossiblyCSSRule(nsIStyleRule* aRule) {
      80                 :     DoForward(aRule);
      81                 :   }
      82                 : 
      83                 :   void Reset() { mCurrent = mRoot; }
      84                 : 
      85                 :   bool AtRoot() { return mCurrent == mRoot; }
      86                 : 
      87                 :   void SetLevel(PRUint8 aLevel, bool aImportance,
      88                 :                 bool aCheckForImportantRules) {
      89                 :     NS_ASSERTION(!aCheckForImportantRules || !aImportance,
      90                 :                  "Shouldn't be checking for important rules while walking "
      91                 :                  "important rules");
      92                 :     mLevel = aLevel;
      93                 :     mImportance = aImportance;
      94                 :     mCheckForImportantRules = aCheckForImportantRules;
      95                 :   }
      96                 :   PRUint8 GetLevel() const { return mLevel; }
      97                 :   bool GetImportance() const { return mImportance; }
      98                 :   bool GetCheckForImportantRules() const { return mCheckForImportantRules; }
      99                 : 
     100                 :   // We define the visited-relevant link to be the link that is the
     101                 :   // nearest self-or-ancestor to the node being matched.
     102                 :   enum VisitedHandlingType {
     103                 :     // Do rule matching as though all links are unvisited.
     104                 :     eRelevantLinkUnvisited,
     105                 :     // Do rule matching as though the relevant link is visited and all
     106                 :     // other links are unvisited.
     107                 :     eRelevantLinkVisited,
     108                 :     // Do rule matching as though a rule should match if it would match
     109                 :     // given any set of visitedness states.  (used by users other than
     110                 :     // nsRuleWalker)
     111                 :     eLinksVisitedOrUnvisited
     112                 :   };
     113                 : 
     114                 : private:
     115                 :   nsRuleNode* mCurrent; // Our current position.  Never null.
     116                 :   nsRuleNode* mRoot; // The root of the tree we're walking.
     117                 :   PRUint8 mLevel; // an nsStyleSet::sheetType
     118                 :   bool mImportance;
     119                 :   bool mCheckForImportantRules; // If true, check for important rules as
     120                 :                                         // we walk and set to false if we find
     121                 :                                         // one.
     122                 : 
     123                 : public:
     124                 :   nsRuleWalker(nsRuleNode* aRoot)
     125                 :     : mCurrent(aRoot)
     126                 :     , mRoot(aRoot)
     127                 :   {
     128                 :     NS_ASSERTION(mCurrent, "Caller screwed up and gave us null node");
     129                 :     MOZ_COUNT_CTOR(nsRuleWalker);
     130                 :   }
     131                 :   ~nsRuleWalker() { MOZ_COUNT_DTOR(nsRuleWalker); }
     132                 : };
     133                 : 
     134                 : #endif /* !defined(nsRuleWalker_h_) */

Generated by: LCOV version 1.7