LCOV - code coverage report
Current view: directory - content/xul/templates/src - nsRDFBinding.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 130 0 0.0 %
Date: 2012-06-02 Functions: 11 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       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 Neil Deakin
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *
      23                 :  * Alternatively, the contents of this file may be used under the terms of
      24                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      25                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      27                 :  * of those above. If you wish to allow use of your version of this file only
      28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      29                 :  * use your version of this file under the terms of the MPL, indicate your
      30                 :  * decision by deleting the provisions above and replace them with the notice
      31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      32                 :  * the provisions above, a recipient may use your version of this file under
      33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      34                 :  *
      35                 :  * ***** END LICENSE BLOCK ***** */
      36                 : 
      37                 : #include "nsXULTemplateQueryProcessorRDF.h"
      38                 : #include "nsXULTemplateResultRDF.h"
      39                 : #include "nsRDFBinding.h"
      40                 : 
      41                 : #ifdef DEBUG
      42                 : #include "nsXULContentUtils.h"
      43                 : #endif
      44                 : 
      45               0 : RDFBindingSet::~RDFBindingSet()
      46                 : {
      47               0 :     while (mFirst) {
      48               0 :         RDFBinding* doomed = mFirst;
      49               0 :         mFirst = mFirst->mNext;
      50               0 :         delete doomed;
      51                 :     }
      52                 : 
      53               0 :     MOZ_COUNT_DTOR(RDFBindingSet);
      54               0 : }
      55                 : 
      56                 : nsresult
      57               0 : RDFBindingSet::AddBinding(nsIAtom* aVar, nsIAtom* aRef, nsIRDFResource* aPredicate)
      58                 : {
      59               0 :     RDFBinding* newbinding = new RDFBinding(aRef, aPredicate, aVar);
      60               0 :     if (! newbinding)
      61               0 :         return NS_ERROR_OUT_OF_MEMORY;
      62                 : 
      63               0 :     if (mFirst) {
      64               0 :         RDFBinding* binding = mFirst;
      65                 : 
      66               0 :         while (binding) { 
      67                 :             // the binding is dependant on the calculation of a previous binding
      68               0 :             if (binding->mSubjectVariable == aVar)
      69               0 :                 newbinding->mHasDependency = true;
      70                 : 
      71                 :             // if the target variable is already used in a binding, ignore it
      72                 :             // since it won't be useful for anything
      73               0 :             if (binding->mTargetVariable == aVar) {
      74               0 :                 delete newbinding;
      75               0 :                 return NS_OK;
      76                 :             }
      77                 : 
      78                 :             // add the binding at the end of the list
      79               0 :             if (! binding->mNext) {
      80               0 :                 binding->mNext = newbinding;
      81               0 :                 break;
      82                 :             }
      83                 : 
      84               0 :             binding = binding->mNext;
      85                 :         }
      86                 :     }
      87                 :     else {
      88               0 :         mFirst = newbinding;
      89                 :     }
      90                 : 
      91               0 :     mCount++;
      92                 : 
      93               0 :     return NS_OK;
      94                 : }
      95                 : 
      96                 : bool
      97               0 : RDFBindingSet::SyncAssignments(nsIRDFResource* aSubject,
      98                 :                                nsIRDFResource* aPredicate,
      99                 :                                nsIRDFNode* aTarget,
     100                 :                                nsIAtom* aMemberVariable,
     101                 :                                nsXULTemplateResultRDF* aResult,
     102                 :                                nsBindingValues& aBindingValues)
     103                 : {
     104               0 :     NS_ASSERTION(aBindingValues.GetBindingSet() == this,
     105                 :                  "nsBindingValues not for this RDFBindingSet");
     106               0 :     NS_PRECONDITION(aResult, "Must have result");
     107                 : 
     108               0 :     bool needSync = false;
     109               0 :     nsCOMPtr<nsIRDFNode>* valuesArray = aBindingValues.ValuesArray();
     110               0 :     if (!valuesArray)
     111               0 :         return false;
     112                 : 
     113               0 :     RDFBinding* binding = mFirst;
     114               0 :     PRInt32 count = 0;
     115                 : 
     116                 :     // QI for proper comparisons just to be safe
     117               0 :     nsCOMPtr<nsIRDFNode> subjectnode = do_QueryInterface(aSubject);
     118                 : 
     119                 :     // iterate through the bindings looking for ones that would match the RDF
     120                 :     // nodes that were involved in a change
     121               0 :     nsCOMPtr<nsIRDFNode> value;
     122               0 :     while (binding) {
     123               0 :         if (aPredicate == binding->mPredicate) {
     124                 :             // if the source of the binding is the member variable, optimize
     125               0 :             if (binding->mSubjectVariable == aMemberVariable) {
     126               0 :                 valuesArray[count] = aTarget;
     127               0 :                 needSync = true;
     128                 :             }
     129                 :             else {
     130               0 :                 aResult->GetAssignment(binding->mSubjectVariable, getter_AddRefs(value));
     131               0 :                 if (value == subjectnode) {
     132               0 :                     valuesArray[count] = aTarget;
     133               0 :                     needSync = true;
     134                 :                 }
     135                 :             }
     136                 :         }
     137                 : 
     138               0 :         binding = binding->mNext;
     139               0 :         count++;
     140                 :     }
     141                 : 
     142               0 :     return needSync;
     143                 : }
     144                 : 
     145                 : void
     146               0 : RDFBindingSet::AddDependencies(nsIRDFResource* aSubject,
     147                 :                                nsXULTemplateResultRDF* aResult)
     148                 : {
     149               0 :     NS_PRECONDITION(aResult, "Must have result");
     150                 : 
     151                 :     // iterate through the bindings and add binding dependencies to the
     152                 :     // processor
     153                 : 
     154               0 :     nsXULTemplateQueryProcessorRDF* processor = aResult->GetProcessor();
     155               0 :     if (! processor)
     156               0 :         return;
     157                 : 
     158               0 :     nsCOMPtr<nsIRDFNode> value;
     159                 : 
     160               0 :     RDFBinding* binding = mFirst;
     161               0 :     while (binding) {
     162               0 :         aResult->GetAssignment(binding->mSubjectVariable, getter_AddRefs(value));
     163                 : 
     164               0 :         nsCOMPtr<nsIRDFResource> valueres = do_QueryInterface(value);
     165               0 :         if (valueres)
     166               0 :             processor->AddBindingDependency(aResult, valueres);
     167                 : 
     168               0 :         binding = binding->mNext;
     169                 :     }
     170                 : }
     171                 : 
     172                 : void
     173               0 : RDFBindingSet::RemoveDependencies(nsIRDFResource* aSubject,
     174                 :                                   nsXULTemplateResultRDF* aResult)
     175                 : {
     176               0 :     NS_PRECONDITION(aResult, "Must have result");
     177                 : 
     178                 :     // iterate through the bindings and remove binding dependencies from the
     179                 :     // processor
     180                 : 
     181               0 :     nsXULTemplateQueryProcessorRDF* processor = aResult->GetProcessor();
     182               0 :     if (! processor)
     183               0 :         return;
     184                 : 
     185               0 :     nsCOMPtr<nsIRDFNode> value;
     186                 : 
     187               0 :     RDFBinding* binding = mFirst;
     188               0 :     while (binding) {
     189               0 :         aResult->GetAssignment(binding->mSubjectVariable, getter_AddRefs(value));
     190                 : 
     191               0 :         nsCOMPtr<nsIRDFResource> valueres = do_QueryInterface(value);
     192               0 :         if (valueres)
     193               0 :             processor->RemoveBindingDependency(aResult, valueres);
     194                 : 
     195               0 :         binding = binding->mNext;
     196                 :     }
     197                 : }
     198                 : 
     199                 : PRInt32
     200               0 : RDFBindingSet::LookupTargetIndex(nsIAtom* aTargetVariable, RDFBinding** aBinding)
     201                 : {
     202               0 :     PRInt32 idx = 0;
     203               0 :     RDFBinding* binding = mFirst;
     204                 : 
     205               0 :     while (binding) {
     206               0 :         if (binding->mTargetVariable == aTargetVariable) {
     207               0 :             *aBinding = binding;
     208               0 :             return idx;
     209                 :         }
     210               0 :         idx++;
     211               0 :         binding = binding->mNext;
     212                 :     }
     213                 : 
     214               0 :     return -1;
     215                 : }
     216                 : 
     217               0 : nsBindingValues::~nsBindingValues()
     218                 : {
     219               0 :     ClearBindingSet();
     220               0 :     MOZ_COUNT_DTOR(nsBindingValues);
     221               0 : }
     222                 : 
     223                 : void
     224               0 : nsBindingValues::ClearBindingSet()
     225                 : {
     226               0 :     if (mBindings && mValues) {
     227               0 :         delete [] mValues;
     228               0 :         mValues = nsnull;
     229                 :     }
     230                 : 
     231               0 :     mBindings = nsnull;
     232               0 : }
     233                 : 
     234                 : nsresult
     235               0 : nsBindingValues::SetBindingSet(RDFBindingSet* aBindings)
     236                 : {
     237               0 :     ClearBindingSet();
     238                 : 
     239               0 :     PRInt32 count = aBindings->Count();
     240               0 :     if (count) {
     241               0 :         mValues = new nsCOMPtr<nsIRDFNode>[count];
     242               0 :         if (!mValues)
     243               0 :             return NS_ERROR_OUT_OF_MEMORY;
     244                 : 
     245               0 :         mBindings = aBindings;
     246                 :     }
     247                 :     else {
     248               0 :         mValues = nsnull;
     249                 :     }
     250                 : 
     251               0 :     return NS_OK;
     252                 : }
     253                 : 
     254                 : void
     255               0 : nsBindingValues::GetAssignmentFor(nsXULTemplateResultRDF* aResult,
     256                 :                                   nsIAtom* aVar,
     257                 :                                   nsIRDFNode** aValue)
     258                 : {
     259               0 :     *aValue = nsnull;
     260                 : 
     261                 :     // assignments are calculated lazily when asked for. The only issue is
     262                 :     // when a binding has no value in the RDF graph, it will be checked again
     263                 :     // every time.
     264                 : 
     265               0 :     if (mBindings && mValues) {
     266                 :         RDFBinding* binding;
     267               0 :         PRInt32 idx = mBindings->LookupTargetIndex(aVar, &binding);
     268               0 :         if (idx >= 0) {
     269               0 :             *aValue = mValues[idx];
     270               0 :             if (*aValue) {
     271               0 :                 NS_ADDREF(*aValue);
     272                 :             }
     273                 :             else {
     274               0 :                 nsXULTemplateQueryProcessorRDF* processor = aResult->GetProcessor();
     275               0 :                 if (! processor)
     276               0 :                     return;
     277                 : 
     278               0 :                 nsIRDFDataSource* ds = processor->GetDataSource();
     279               0 :                 if (! ds)
     280               0 :                     return;
     281                 : 
     282               0 :                 nsCOMPtr<nsIRDFNode> subjectValue;
     283                 :                 aResult->GetAssignment(binding->mSubjectVariable,
     284               0 :                                        getter_AddRefs(subjectValue));
     285               0 :                 if (subjectValue) {
     286               0 :                     nsCOMPtr<nsIRDFResource> subject = do_QueryInterface(subjectValue);
     287               0 :                     ds->GetTarget(subject, binding->mPredicate, true, aValue);
     288               0 :                     if (*aValue)
     289               0 :                         mValues[idx] = *aValue;
     290                 :                 }
     291                 :             }
     292                 :         }
     293                 :     }
     294                 : }
     295                 : 
     296                 : void
     297               0 : nsBindingValues::RemoveDependencies(nsIRDFResource* aSubject,
     298                 :                                     nsXULTemplateResultRDF* aResult)
     299                 : {
     300               0 :     if (mBindings)
     301               0 :         mBindings->RemoveDependencies(aSubject, aResult);
     302               0 : }

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