1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/xul/templates/src/nsRDFPropertyTestNode.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,387 @@
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 "nsRDFPropertyTestNode.h"
1.10 +#include "nsString.h"
1.11 +#include "nsXULContentUtils.h"
1.12 +
1.13 +#include "prlog.h"
1.14 +#ifdef PR_LOGGING
1.15 +extern PRLogModuleInfo* gXULTemplateLog;
1.16 +#include "nsIRDFLiteral.h"
1.17 +#endif
1.18 +
1.19 +nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
1.20 + nsXULTemplateQueryProcessorRDF* aProcessor,
1.21 + nsIAtom* aSourceVariable,
1.22 + nsIRDFResource* aProperty,
1.23 + nsIAtom* aTargetVariable)
1.24 + : nsRDFTestNode(aParent),
1.25 + mProcessor(aProcessor),
1.26 + mSourceVariable(aSourceVariable),
1.27 + mSource(nullptr),
1.28 + mProperty(aProperty),
1.29 + mTargetVariable(aTargetVariable),
1.30 + mTarget(nullptr)
1.31 +{
1.32 +#ifdef PR_LOGGING
1.33 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.34 + const char* prop = "(null)";
1.35 + if (aProperty)
1.36 + aProperty->GetValueConst(&prop);
1.37 +
1.38 + nsAutoString svar(NS_LITERAL_STRING("(none)"));
1.39 + if (mSourceVariable)
1.40 + mSourceVariable->ToString(svar);
1.41 +
1.42 + nsAutoString tvar(NS_LITERAL_STRING("(none)"));
1.43 + if (mTargetVariable)
1.44 + mTargetVariable->ToString(tvar);
1.45 +
1.46 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.47 + ("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
1.48 + this, aParent, NS_ConvertUTF16toUTF8(svar).get(), prop, NS_ConvertUTF16toUTF8(tvar).get()));
1.49 + }
1.50 +#endif
1.51 +}
1.52 +
1.53 +
1.54 +nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
1.55 + nsXULTemplateQueryProcessorRDF* aProcessor,
1.56 + nsIRDFResource* aSource,
1.57 + nsIRDFResource* aProperty,
1.58 + nsIAtom* aTargetVariable)
1.59 + : nsRDFTestNode(aParent),
1.60 + mProcessor(aProcessor),
1.61 + mSourceVariable(0),
1.62 + mSource(aSource),
1.63 + mProperty(aProperty),
1.64 + mTargetVariable(aTargetVariable),
1.65 + mTarget(nullptr)
1.66 +{
1.67 +#ifdef PR_LOGGING
1.68 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.69 + const char* source = "(null)";
1.70 + if (aSource)
1.71 + aSource->GetValueConst(&source);
1.72 +
1.73 + const char* prop = "(null)";
1.74 + if (aProperty)
1.75 + aProperty->GetValueConst(&prop);
1.76 +
1.77 + nsAutoString tvar(NS_LITERAL_STRING("(none)"));
1.78 + if (mTargetVariable)
1.79 + mTargetVariable->ToString(tvar);
1.80 +
1.81 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.82 + ("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
1.83 + this, aParent, source, prop, NS_ConvertUTF16toUTF8(tvar).get()));
1.84 + }
1.85 +#endif
1.86 +}
1.87 +
1.88 +
1.89 +nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
1.90 + nsXULTemplateQueryProcessorRDF* aProcessor,
1.91 + nsIAtom* aSourceVariable,
1.92 + nsIRDFResource* aProperty,
1.93 + nsIRDFNode* aTarget)
1.94 + : nsRDFTestNode(aParent),
1.95 + mProcessor(aProcessor),
1.96 + mSourceVariable(aSourceVariable),
1.97 + mSource(nullptr),
1.98 + mProperty(aProperty),
1.99 + mTargetVariable(0),
1.100 + mTarget(aTarget)
1.101 +{
1.102 +#ifdef PR_LOGGING
1.103 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.104 + nsAutoString svar(NS_LITERAL_STRING("(none)"));
1.105 + if (mSourceVariable)
1.106 + mSourceVariable->ToString(svar);
1.107 +
1.108 + const char* prop = "(null)";
1.109 + if (aProperty)
1.110 + aProperty->GetValueConst(&prop);
1.111 +
1.112 + nsAutoString target;
1.113 + nsXULContentUtils::GetTextForNode(aTarget, target);
1.114 +
1.115 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.116 + ("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
1.117 + this, aParent, NS_ConvertUTF16toUTF8(svar).get(), prop, NS_ConvertUTF16toUTF8(target).get()));
1.118 + }
1.119 +#endif
1.120 +}
1.121 +
1.122 +
1.123 +nsresult
1.124 +nsRDFPropertyTestNode::FilterInstantiations(InstantiationSet& aInstantiations,
1.125 + bool* aCantHandleYet) const
1.126 +{
1.127 + nsresult rv;
1.128 +
1.129 + if (aCantHandleYet)
1.130 + *aCantHandleYet = false;
1.131 +
1.132 + nsIRDFDataSource* ds = mProcessor->GetDataSource();
1.133 +
1.134 + InstantiationSet::Iterator last = aInstantiations.Last();
1.135 + for (InstantiationSet::Iterator inst = aInstantiations.First(); inst != last; ++inst) {
1.136 + bool hasSourceBinding;
1.137 + nsCOMPtr<nsIRDFResource> sourceRes;
1.138 +
1.139 + if (mSource) {
1.140 + hasSourceBinding = true;
1.141 + sourceRes = mSource;
1.142 + }
1.143 + else {
1.144 + nsCOMPtr<nsIRDFNode> sourceValue;
1.145 + hasSourceBinding = inst->mAssignments.GetAssignmentFor(mSourceVariable,
1.146 + getter_AddRefs(sourceValue));
1.147 + sourceRes = do_QueryInterface(sourceValue);
1.148 + }
1.149 +
1.150 + bool hasTargetBinding;
1.151 + nsCOMPtr<nsIRDFNode> targetValue;
1.152 +
1.153 + if (mTarget) {
1.154 + hasTargetBinding = true;
1.155 + targetValue = mTarget;
1.156 + }
1.157 + else {
1.158 + hasTargetBinding = inst->mAssignments.GetAssignmentFor(mTargetVariable,
1.159 + getter_AddRefs(targetValue));
1.160 + }
1.161 +
1.162 +#ifdef PR_LOGGING
1.163 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.164 + const char* source = "(unbound)";
1.165 + if (hasSourceBinding)
1.166 + sourceRes->GetValueConst(&source);
1.167 +
1.168 + nsAutoString target(NS_LITERAL_STRING("(unbound)"));
1.169 + if (hasTargetBinding)
1.170 + nsXULContentUtils::GetTextForNode(targetValue, target);
1.171 +
1.172 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.173 + ("nsRDFPropertyTestNode[%p]: FilterInstantiations() source=[%s] target=[%s]",
1.174 + this, source, NS_ConvertUTF16toUTF8(target).get()));
1.175 + }
1.176 +#endif
1.177 +
1.178 + if (hasSourceBinding && hasTargetBinding) {
1.179 + // it's a consistency check. see if we have a assignment that is consistent
1.180 + bool hasAssertion;
1.181 + rv = ds->HasAssertion(sourceRes, mProperty, targetValue,
1.182 + true, &hasAssertion);
1.183 + if (NS_FAILED(rv)) return rv;
1.184 +
1.185 +#ifdef PR_LOGGING
1.186 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.187 + (" consistency check => %s", hasAssertion ? "passed" : "failed"));
1.188 +#endif
1.189 +
1.190 + if (hasAssertion) {
1.191 + // it's consistent.
1.192 + Element* element =
1.193 + new nsRDFPropertyTestNode::Element(sourceRes, mProperty,
1.194 + targetValue);
1.195 +
1.196 + if (! element)
1.197 + return NS_ERROR_OUT_OF_MEMORY;
1.198 +
1.199 + inst->AddSupportingElement(element);
1.200 + }
1.201 + else {
1.202 + // it's inconsistent. remove it.
1.203 + aInstantiations.Erase(inst--);
1.204 + }
1.205 + }
1.206 + else if ((hasSourceBinding && ! hasTargetBinding) ||
1.207 + (! hasSourceBinding && hasTargetBinding)) {
1.208 + // it's an open ended query on the source or
1.209 + // target. figure out what matches and add as a
1.210 + // cross-product.
1.211 + nsCOMPtr<nsISimpleEnumerator> results;
1.212 + if (hasSourceBinding) {
1.213 + rv = ds->GetTargets(sourceRes,
1.214 + mProperty,
1.215 + true,
1.216 + getter_AddRefs(results));
1.217 + }
1.218 + else {
1.219 + rv = ds->GetSources(mProperty,
1.220 + targetValue,
1.221 + true,
1.222 + getter_AddRefs(results));
1.223 + if (NS_FAILED(rv)) return rv;
1.224 + }
1.225 +
1.226 + while (1) {
1.227 + bool hasMore;
1.228 + rv = results->HasMoreElements(&hasMore);
1.229 + if (NS_FAILED(rv)) return rv;
1.230 +
1.231 + if (! hasMore)
1.232 + break;
1.233 +
1.234 + nsCOMPtr<nsISupports> isupports;
1.235 + rv = results->GetNext(getter_AddRefs(isupports));
1.236 + if (NS_FAILED(rv)) return rv;
1.237 +
1.238 + nsIAtom* variable;
1.239 + nsCOMPtr<nsIRDFNode> value;
1.240 +
1.241 + if (hasSourceBinding) {
1.242 + variable = mTargetVariable;
1.243 +
1.244 + value = do_QueryInterface(isupports);
1.245 + NS_ASSERTION(value != nullptr, "target is not an nsIRDFNode");
1.246 +
1.247 +#ifdef PR_LOGGING
1.248 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.249 + nsAutoString s(NS_LITERAL_STRING("(none found)"));
1.250 + if (value)
1.251 + nsXULContentUtils::GetTextForNode(value, s);
1.252 +
1.253 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.254 + (" target => %s", NS_ConvertUTF16toUTF8(s).get()));
1.255 + }
1.256 +#endif
1.257 +
1.258 + if (! value) continue;
1.259 +
1.260 + targetValue = value;
1.261 + }
1.262 + else {
1.263 + variable = mSourceVariable;
1.264 +
1.265 + nsCOMPtr<nsIRDFResource> source = do_QueryInterface(isupports);
1.266 + NS_ASSERTION(source != nullptr, "source is not an nsIRDFResource");
1.267 +
1.268 +#ifdef PR_LOGGING
1.269 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.270 + const char* s = "(none found)";
1.271 + if (source)
1.272 + source->GetValueConst(&s);
1.273 +
1.274 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.275 + (" source => %s", s));
1.276 + }
1.277 +#endif
1.278 +
1.279 + if (! source) continue;
1.280 +
1.281 + value = sourceRes = source;
1.282 + }
1.283 +
1.284 + // Copy the original instantiation, and add it to the
1.285 + // instantiation set with the new assignment that we've
1.286 + // introduced. Ownership will be transferred to the
1.287 + Instantiation newinst = *inst;
1.288 + newinst.AddAssignment(variable, value);
1.289 +
1.290 + Element* element =
1.291 + new nsRDFPropertyTestNode::Element(sourceRes, mProperty,
1.292 + targetValue);
1.293 +
1.294 + if (! element)
1.295 + return NS_ERROR_OUT_OF_MEMORY;
1.296 +
1.297 + newinst.AddSupportingElement(element);
1.298 +
1.299 + aInstantiations.Insert(inst, newinst);
1.300 + }
1.301 +
1.302 + // finally, remove the "under specified" instantiation.
1.303 + aInstantiations.Erase(inst--);
1.304 + }
1.305 + else {
1.306 + if (!aCantHandleYet) {
1.307 + nsXULContentUtils::LogTemplateError(ERROR_TEMPLATE_TRIPLE_UNBOUND);
1.308 + // Neither source nor target assignment!
1.309 + return NS_ERROR_UNEXPECTED;
1.310 + }
1.311 +
1.312 + *aCantHandleYet = true;
1.313 + return NS_OK;
1.314 + }
1.315 + }
1.316 +
1.317 + return NS_OK;
1.318 +}
1.319 +
1.320 +bool
1.321 +nsRDFPropertyTestNode::CanPropagate(nsIRDFResource* aSource,
1.322 + nsIRDFResource* aProperty,
1.323 + nsIRDFNode* aTarget,
1.324 + Instantiation& aInitialBindings) const
1.325 +{
1.326 + bool result;
1.327 +
1.328 + if ((mProperty.get() != aProperty) ||
1.329 + (mSource && mSource.get() != aSource) ||
1.330 + (mTarget && mTarget.get() != aTarget)) {
1.331 + result = false;
1.332 + }
1.333 + else {
1.334 + if (mSourceVariable)
1.335 + aInitialBindings.AddAssignment(mSourceVariable, aSource);
1.336 +
1.337 + if (mTargetVariable)
1.338 + aInitialBindings.AddAssignment(mTargetVariable, aTarget);
1.339 +
1.340 + result = true;
1.341 + }
1.342 +
1.343 +#ifdef PR_LOGGING
1.344 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.345 + const char* source;
1.346 + aSource->GetValueConst(&source);
1.347 +
1.348 + const char* property;
1.349 + aProperty->GetValueConst(&property);
1.350 +
1.351 + nsAutoString target;
1.352 + nsXULContentUtils::GetTextForNode(aTarget, target);
1.353 +
1.354 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.355 + ("nsRDFPropertyTestNode[%p]: CanPropagate([%s]==[%s]=>[%s]) => %s",
1.356 + this, source, property, NS_ConvertUTF16toUTF8(target).get(),
1.357 + result ? "true" : "false"));
1.358 + }
1.359 +#endif
1.360 +
1.361 + return result;
1.362 +}
1.363 +
1.364 +void
1.365 +nsRDFPropertyTestNode::Retract(nsIRDFResource* aSource,
1.366 + nsIRDFResource* aProperty,
1.367 + nsIRDFNode* aTarget) const
1.368 +{
1.369 + if (aProperty == mProperty.get()) {
1.370 +#ifdef PR_LOGGING
1.371 + if (PR_LOG_TEST(gXULTemplateLog, PR_LOG_DEBUG)) {
1.372 + const char* source;
1.373 + aSource->GetValueConst(&source);
1.374 +
1.375 + const char* property;
1.376 + aProperty->GetValueConst(&property);
1.377 +
1.378 + nsAutoString target;
1.379 + nsXULContentUtils::GetTextForNode(aTarget, target);
1.380 +
1.381 + PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
1.382 + ("nsRDFPropertyTestNode[%p]: Retract([%s]==[%s]=>[%s])",
1.383 + this, source, property, NS_ConvertUTF16toUTF8(target).get()));
1.384 + }
1.385 +#endif
1.386 +
1.387 + mProcessor->RetractElement(Element(aSource, aProperty, aTarget));
1.388 + }
1.389 +}
1.390 +
