1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/xul/templates/src/nsXULTemplateResultRDF.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,208 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsXULTemplateResultRDF.h"
1.10 +#include "nsXULContentUtils.h"
1.11 +
1.12 +// XXXndeakin for some reason, making this class have classinfo breaks trees.
1.13 +//#include "nsIDOMClassInfo.h"
1.14 +
1.15 +NS_IMPL_CYCLE_COLLECTION(nsXULTemplateResultRDF, mQuery)
1.16 +
1.17 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXULTemplateResultRDF)
1.18 + NS_INTERFACE_MAP_ENTRY(nsIXULTemplateResult)
1.19 + NS_INTERFACE_MAP_ENTRY(nsISupports)
1.20 +NS_INTERFACE_MAP_END
1.21 +
1.22 +NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXULTemplateResultRDF)
1.23 +NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXULTemplateResultRDF)
1.24 +
1.25 +nsXULTemplateResultRDF::nsXULTemplateResultRDF(nsIRDFResource* aNode)
1.26 + : mQuery(nullptr),
1.27 + mNode(aNode)
1.28 +{
1.29 +}
1.30 +
1.31 +nsXULTemplateResultRDF::nsXULTemplateResultRDF(nsRDFQuery* aQuery,
1.32 + const Instantiation& aInst,
1.33 + nsIRDFResource *aNode)
1.34 + : mQuery(aQuery),
1.35 + mNode(aNode),
1.36 + mInst(aInst)
1.37 +{
1.38 +}
1.39 +
1.40 +nsXULTemplateResultRDF::~nsXULTemplateResultRDF()
1.41 +{
1.42 +}
1.43 +
1.44 +NS_IMETHODIMP
1.45 +nsXULTemplateResultRDF::GetIsContainer(bool* aIsContainer)
1.46 +{
1.47 + *aIsContainer = false;
1.48 +
1.49 + if (mNode) {
1.50 + nsXULTemplateQueryProcessorRDF* processor = GetProcessor();
1.51 + if (processor)
1.52 + return processor->CheckContainer(mNode, aIsContainer);
1.53 + }
1.54 +
1.55 + return NS_OK;
1.56 +}
1.57 +
1.58 +NS_IMETHODIMP
1.59 +nsXULTemplateResultRDF::GetIsEmpty(bool* aIsEmpty)
1.60 +{
1.61 + *aIsEmpty = true;
1.62 +
1.63 + if (mNode) {
1.64 + nsXULTemplateQueryProcessorRDF* processor = GetProcessor();
1.65 + if (processor)
1.66 + return processor->CheckEmpty(mNode, aIsEmpty);
1.67 + }
1.68 +
1.69 + return NS_OK;
1.70 +}
1.71 +
1.72 +NS_IMETHODIMP
1.73 +nsXULTemplateResultRDF::GetMayProcessChildren(bool* aMayProcessChildren)
1.74 +{
1.75 + // RDF always allows recursion
1.76 + *aMayProcessChildren = true;
1.77 + return NS_OK;
1.78 +}
1.79 +
1.80 +NS_IMETHODIMP
1.81 +nsXULTemplateResultRDF::GetId(nsAString& aId)
1.82 +{
1.83 + if (! mNode)
1.84 + return NS_ERROR_FAILURE;
1.85 +
1.86 + const char* uri;
1.87 + mNode->GetValueConst(&uri);
1.88 +
1.89 + CopyUTF8toUTF16(uri, aId);
1.90 +
1.91 + return NS_OK;
1.92 +}
1.93 +
1.94 +NS_IMETHODIMP
1.95 +nsXULTemplateResultRDF::GetResource(nsIRDFResource** aResource)
1.96 +{
1.97 + *aResource = mNode;
1.98 + NS_IF_ADDREF(*aResource);
1.99 + return NS_OK;
1.100 +}
1.101 +
1.102 +NS_IMETHODIMP
1.103 +nsXULTemplateResultRDF::GetType(nsAString& aType)
1.104 +{
1.105 + aType.Truncate();
1.106 +
1.107 + nsresult rv = NS_OK;
1.108 +
1.109 + nsXULTemplateQueryProcessorRDF* processor = GetProcessor();
1.110 + if (processor) {
1.111 + bool found;
1.112 + rv = processor->CheckIsSeparator(mNode, &found);
1.113 + if (NS_SUCCEEDED(rv) && found)
1.114 + aType.AssignLiteral("separator");
1.115 + }
1.116 +
1.117 + return rv;
1.118 +}
1.119 +
1.120 +NS_IMETHODIMP
1.121 +nsXULTemplateResultRDF::GetBindingFor(nsIAtom* aVar, nsAString& aValue)
1.122 +{
1.123 + nsCOMPtr<nsIRDFNode> val;
1.124 + GetAssignment(aVar, getter_AddRefs(val));
1.125 +
1.126 + return nsXULContentUtils::GetTextForNode(val, aValue);
1.127 +}
1.128 +
1.129 +NS_IMETHODIMP
1.130 +nsXULTemplateResultRDF::GetBindingObjectFor(nsIAtom* aVar, nsISupports** aValue)
1.131 +{
1.132 + GetAssignment(aVar, (nsIRDFNode **)aValue);
1.133 +
1.134 + return NS_OK;
1.135 +}
1.136 +
1.137 +NS_IMETHODIMP
1.138 +nsXULTemplateResultRDF::RuleMatched(nsISupports* aQuery, nsIDOMNode* aRuleNode)
1.139 +{
1.140 + // when a rule matches, set the bindings that must be used.
1.141 + nsXULTemplateQueryProcessorRDF* processor = GetProcessor();
1.142 + if (processor) {
1.143 + RDFBindingSet* bindings = processor->GetBindingsForRule(aRuleNode);
1.144 + if (bindings) {
1.145 + nsresult rv = mBindingValues.SetBindingSet(bindings);
1.146 + if (NS_FAILED(rv))
1.147 + return rv;
1.148 +
1.149 + bindings->AddDependencies(mNode, this);
1.150 + }
1.151 + }
1.152 +
1.153 + return NS_OK;
1.154 +}
1.155 +
1.156 +NS_IMETHODIMP
1.157 +nsXULTemplateResultRDF::HasBeenRemoved()
1.158 +{
1.159 + // when a result is no longer used, clean up the dependencies and
1.160 + // memory elements that refer to it
1.161 + mBindingValues.RemoveDependencies(mNode, this);
1.162 +
1.163 + nsXULTemplateQueryProcessorRDF* processor = GetProcessor();
1.164 + if (processor)
1.165 + processor->RemoveMemoryElements(mInst, this);
1.166 +
1.167 + return NS_OK;
1.168 +}
1.169 +
1.170 +
1.171 +void
1.172 +nsXULTemplateResultRDF::GetAssignment(nsIAtom* aVar, nsIRDFNode** aValue)
1.173 +{
1.174 + // look up a variable in the assignments map
1.175 + *aValue = nullptr;
1.176 + mInst.mAssignments.GetAssignmentFor(aVar, aValue);
1.177 +
1.178 + // if not found, look up the variable in the bindings
1.179 + if (! *aValue)
1.180 + mBindingValues.GetAssignmentFor(this, aVar, aValue);
1.181 +}
1.182 +
1.183 +
1.184 +bool
1.185 +nsXULTemplateResultRDF::SyncAssignments(nsIRDFResource* aSubject,
1.186 + nsIRDFResource* aPredicate,
1.187 + nsIRDFNode* aTarget)
1.188 +{
1.189 + // synchronize the bindings when an assertion is added or removed
1.190 + RDFBindingSet* bindingset = mBindingValues.GetBindingSet();
1.191 + if (bindingset) {
1.192 + return bindingset->SyncAssignments(aSubject, aPredicate, aTarget,
1.193 + (aSubject == mNode) ? mQuery->GetMemberVariable() : nullptr,
1.194 + this, mBindingValues);
1.195 + }
1.196 +
1.197 + return false;
1.198 +}
1.199 +
1.200 +bool
1.201 +nsXULTemplateResultRDF::HasMemoryElement(const MemoryElement& aMemoryElement)
1.202 +{
1.203 + MemoryElementSet::ConstIterator last = mInst.mSupport.Last();
1.204 + for (MemoryElementSet::ConstIterator element = mInst.mSupport.First();
1.205 + element != last; ++element) {
1.206 + if ((*element).Equals(aMemoryElement))
1.207 + return true;
1.208 + }
1.209 +
1.210 + return false;
1.211 +}
