LCOV - code coverage report
Current view: directory - content/xul/templates/src - nsRDFConInstanceTestNode.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 119 0 0.0 %
Date: 2012-06-02 Functions: 5 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 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                 :  *   Chris Waterson <waterson@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                 : #include "nsIComponentManager.h"
      40                 : #include "nsIRDFContainer.h"
      41                 : #include "nsIRDFContainerUtils.h"
      42                 : #include "nsIServiceManager.h"
      43                 : #include "nsRDFCID.h"
      44                 : #include "nsRDFConInstanceTestNode.h"
      45                 : #include "nsResourceSet.h"
      46                 : 
      47                 : #include "prlog.h"
      48                 : #ifdef PR_LOGGING
      49                 : #include "nsXULContentUtils.h"
      50                 : extern PRLogModuleInfo* gXULTemplateLog;
      51                 : 
      52                 : static const char*
      53               0 : TestToString(nsRDFConInstanceTestNode::Test aTest) {
      54               0 :     switch (aTest) {
      55               0 :     case nsRDFConInstanceTestNode::eFalse:    return "false";
      56               0 :     case nsRDFConInstanceTestNode::eTrue:     return "true";
      57               0 :     case nsRDFConInstanceTestNode::eDontCare: return "dontcare";
      58                 :     }
      59               0 :     return "?";
      60                 : }
      61                 : #endif
      62                 : 
      63               0 : nsRDFConInstanceTestNode::nsRDFConInstanceTestNode(TestNode* aParent,
      64                 :                                                    nsXULTemplateQueryProcessorRDF* aProcessor,
      65                 :                                                    nsIAtom* aContainerVariable,
      66                 :                                                    Test aContainer,
      67                 :                                                    Test aEmpty)
      68                 :     : nsRDFTestNode(aParent),
      69                 :       mProcessor(aProcessor),
      70                 :       mContainerVariable(aContainerVariable),
      71                 :       mContainer(aContainer),
      72               0 :       mEmpty(aEmpty)
      73                 : {
      74                 : #ifdef PR_LOGGING
      75               0 :     if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
      76               0 :         nsCAutoString props;
      77                 : 
      78               0 :         nsResourceSet& containmentProps = aProcessor->ContainmentProperties();
      79               0 :         nsResourceSet::ConstIterator last = containmentProps.Last();
      80               0 :         nsResourceSet::ConstIterator first = containmentProps.First();
      81               0 :         nsResourceSet::ConstIterator iter;
      82                 : 
      83               0 :         for (iter = first; iter != last; ++iter) {
      84               0 :             if (iter != first)
      85               0 :                 props += " ";
      86                 : 
      87                 :             const char* str;
      88               0 :             iter->GetValueConst(&str);
      89                 : 
      90               0 :             props += str;
      91                 :         }
      92                 : 
      93               0 :         nsAutoString cvar(NS_LITERAL_STRING("(none)"));
      94               0 :         if (mContainerVariable)
      95               0 :             mContainerVariable->ToString(cvar);
      96                 : 
      97               0 :         PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
      98                 :                ("nsRDFConInstanceTestNode[%p]: parent=%p member-props=(%s) container-var=%s container=%s empty=%s",
      99                 :                 this,
     100                 :                 aParent,
     101                 :                 props.get(),
     102                 :                 NS_ConvertUTF16toUTF8(cvar).get(),
     103                 :                 TestToString(aContainer),
     104                 :                 TestToString(aEmpty)));
     105                 :     }
     106                 : #endif
     107               0 : }
     108                 : 
     109                 : nsresult
     110               0 : nsRDFConInstanceTestNode::FilterInstantiations(InstantiationSet& aInstantiations,
     111                 :                                                bool* aCantHandleYet) const
     112                 : {
     113                 :     nsresult rv;
     114                 : 
     115               0 :     if (aCantHandleYet)
     116               0 :         *aCantHandleYet = false;
     117                 : 
     118                 :     nsCOMPtr<nsIRDFContainerUtils> rdfc
     119               0 :         = do_GetService("@mozilla.org/rdf/container-utils;1");
     120                 : 
     121               0 :     if (! rdfc)
     122               0 :         return NS_ERROR_FAILURE;
     123                 : 
     124               0 :     nsIRDFDataSource* ds = mProcessor->GetDataSource();
     125                 : 
     126               0 :     InstantiationSet::Iterator last = aInstantiations.Last();
     127               0 :     for (InstantiationSet::Iterator inst = aInstantiations.First(); inst != last; ++inst) {
     128               0 :         nsCOMPtr<nsIRDFNode> value;
     129               0 :         if (! inst->mAssignments.GetAssignmentFor(mContainerVariable, getter_AddRefs(value))) {
     130               0 :             NS_ERROR("can't do unbounded container testing");
     131               0 :             return NS_ERROR_UNEXPECTED;
     132                 :         }
     133                 : 
     134               0 :         nsCOMPtr<nsIRDFResource> valueres = do_QueryInterface(value);
     135               0 :         if (! valueres) {
     136               0 :             aInstantiations.Erase(inst--);
     137               0 :             continue;
     138                 :         }
     139                 : 
     140                 : #ifdef PR_LOGGING
     141               0 :         if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
     142               0 :             const char* container = "(unbound)";
     143               0 :             valueres->GetValueConst(&container);
     144                 : 
     145               0 :             PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
     146                 :                    ("nsRDFConInstanceTestNode[%p]::FilterInstantiations() container=[%s]",
     147                 :                     this, container));
     148                 :         }
     149                 : #endif
     150                 : 
     151               0 :         nsCOMPtr<nsIRDFContainer> rdfcontainer;
     152                 : 
     153                 :         bool isRDFContainer;
     154               0 :         rv = rdfc->IsContainer(ds, valueres, &isRDFContainer);
     155               0 :         if (NS_FAILED(rv)) return rv;
     156                 : 
     157               0 :         if (mEmpty != eDontCare || mContainer != eDontCare) {
     158               0 :             Test empty = eDontCare;
     159               0 :             Test container = eDontCare;
     160                 : 
     161               0 :             if (isRDFContainer) {
     162                 :                 // It's an RDF container. Use the container utilities
     163                 :                 // to deduce what's in it.
     164               0 :                 container = eTrue;
     165                 : 
     166                 :                 // XXX should cache the factory
     167               0 :                 rdfcontainer = do_CreateInstance("@mozilla.org/rdf/container;1", &rv);
     168               0 :                 if (NS_FAILED(rv)) return rv;
     169                 : 
     170               0 :                 rv = rdfcontainer->Init(ds, valueres);
     171               0 :                 if (NS_FAILED(rv)) return rv;
     172                 : 
     173                 :                 PRInt32 count;
     174               0 :                 rv = rdfcontainer->GetCount(&count);
     175               0 :                 if (NS_FAILED(rv)) return rv;
     176                 : 
     177               0 :                 empty = (count == 0) ? eTrue : eFalse;
     178                 :             } else {
     179               0 :                 empty = eTrue;
     180               0 :                 container = eFalse;
     181                 : 
     182                 :                 // First do the simple check of finding some outward
     183                 :                 // arcs; there should be only a few containment arcs, so this can
     184                 :                 // save us time from dealing with an iterator later on
     185               0 :                 nsResourceSet& containmentProps = mProcessor->ContainmentProperties();
     186               0 :                 for (nsResourceSet::ConstIterator property = containmentProps.First();
     187               0 :                      property != containmentProps.Last();
     188                 :                      ++property) {
     189               0 :                     nsCOMPtr<nsIRDFNode> target;
     190               0 :                     rv = ds->GetTarget(valueres, *property, true, getter_AddRefs(target));
     191               0 :                     if (NS_FAILED(rv)) return rv;
     192                 : 
     193               0 :                     if (target != nsnull) {
     194                 :                         // bingo. we found one.
     195               0 :                         empty = eFalse;
     196               0 :                         container = eTrue;
     197                 :                         break;
     198                 :                     }
     199                 :                 }
     200                 : 
     201                 :                 // if we still don't think its a container, but we
     202                 :                 // want to know for sure whether it is or not, we need
     203                 :                 // to check ArcLabelsOut for potential container arcs.
     204               0 :                 if (container == eFalse && mContainer != eDontCare) {
     205               0 :                     nsCOMPtr<nsISimpleEnumerator> arcsout;
     206               0 :                     rv = ds->ArcLabelsOut(valueres, getter_AddRefs(arcsout));
     207               0 :                     if (NS_FAILED(rv)) return rv;
     208                 : 
     209               0 :                     while (1) {
     210                 :                         bool hasmore;
     211               0 :                         rv = arcsout->HasMoreElements(&hasmore);
     212               0 :                         if (NS_FAILED(rv)) return rv;
     213                 : 
     214               0 :                         if (! hasmore)
     215               0 :                             break;
     216                 : 
     217               0 :                         nsCOMPtr<nsISupports> isupports;
     218               0 :                         rv = arcsout->GetNext(getter_AddRefs(isupports));
     219               0 :                         if (NS_FAILED(rv)) return rv;
     220                 : 
     221               0 :                         nsCOMPtr<nsIRDFResource> property = do_QueryInterface(isupports);
     222               0 :                         NS_ASSERTION(property != nsnull, "not a property");
     223               0 :                         if (! property)
     224               0 :                             return NS_ERROR_UNEXPECTED;
     225                 : 
     226               0 :                         if (mProcessor->ContainmentProperties().Contains(property)) {
     227               0 :                             container = eTrue;
     228                 :                             break;
     229                 :                         }
     230                 :                     }
     231                 :                 }
     232                 :             }
     233                 : 
     234               0 :             PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
     235                 :                    ("    empty => %s",
     236                 :                     (empty == mEmpty) ? "consistent" : "inconsistent"));
     237                 : 
     238               0 :             PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
     239                 :                    ("    container => %s",
     240                 :                     (container == mContainer) ? "consistent" : "inconsistent"));
     241                 : 
     242               0 :             if (((mEmpty == empty) && (mContainer == container)) ||
     243                 :                 ((mEmpty == eDontCare) && (mContainer == container)) ||
     244                 :                 ((mContainer == eDontCare) && (mEmpty == empty)))
     245                 :             {
     246                 :                 Element* element =
     247               0 :                     nsRDFConInstanceTestNode::Element::Create(valueres, container, empty);
     248                 : 
     249               0 :                 if (! element)
     250               0 :                     return NS_ERROR_OUT_OF_MEMORY;
     251                 : 
     252               0 :                 inst->AddSupportingElement(element);
     253                 :             }
     254                 :             else {
     255               0 :                 aInstantiations.Erase(inst--);
     256                 :             }
     257                 :         }
     258                 :     }
     259                 : 
     260               0 :     return NS_OK;
     261                 : }
     262                 : 
     263                 : bool
     264               0 : nsRDFConInstanceTestNode::CanPropagate(nsIRDFResource* aSource,
     265                 :                                        nsIRDFResource* aProperty,
     266                 :                                        nsIRDFNode* aTarget,
     267                 :                                        Instantiation& aInitialBindings) const
     268                 : {
     269                 :     nsresult rv;
     270                 : 
     271               0 :     bool canpropagate = false;
     272                 : 
     273                 :     nsCOMPtr<nsIRDFContainerUtils> rdfc
     274               0 :         = do_GetService("@mozilla.org/rdf/container-utils;1");
     275                 : 
     276               0 :     if (! rdfc)
     277               0 :         return false;
     278                 : 
     279                 :     // We can certainly propagate ordinal properties
     280               0 :     rv = rdfc->IsOrdinalProperty(aProperty, &canpropagate);
     281               0 :     if (NS_FAILED(rv)) return false;
     282                 : 
     283               0 :     if (! canpropagate) {
     284               0 :         canpropagate = mProcessor->ContainmentProperties().Contains(aProperty);
     285                 :     }
     286                 : 
     287                 : #ifdef PR_LOGGING
     288               0 :     if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
     289                 :         const char* source;
     290               0 :         aSource->GetValueConst(&source);
     291                 : 
     292                 :         const char* property;
     293               0 :         aProperty->GetValueConst(&property);
     294                 : 
     295               0 :         nsAutoString target;
     296               0 :         nsXULContentUtils::GetTextForNode(aTarget, target);
     297                 : 
     298               0 :         PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
     299                 :                ("nsRDFConInstanceTestNode[%p]: CanPropagate([%s]==[%s]=>[%s]) => %s",
     300                 :                 this, source, property, NS_ConvertUTF16toUTF8(target).get(),
     301                 :                 canpropagate ? "true" : "false"));
     302                 :     }
     303                 : #endif
     304                 : 
     305               0 :     if (canpropagate) {
     306               0 :         aInitialBindings.AddAssignment(mContainerVariable, aSource);
     307               0 :         return true;
     308                 :     }
     309                 : 
     310               0 :     return false;
     311                 : }
     312                 : 
     313                 : void
     314               0 : nsRDFConInstanceTestNode::Retract(nsIRDFResource* aSource,
     315                 :                                   nsIRDFResource* aProperty,
     316                 :                                   nsIRDFNode* aTarget) const
     317                 : {
     318                 :     // XXXwaterson oof. complicated. figure this out.
     319                 :     if (0) {
     320                 :         mProcessor->RetractElement(Element(aSource, mContainer, mEmpty));
     321                 :     }
     322               0 : }
     323                 : 

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