mirror of
https://github.com/classilla/tenfourfox.git
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363 lines
13 KiB
C++
363 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsRDFPropertyTestNode.h"
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#include "nsString.h"
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#include "nsXULContentUtils.h"
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#include "mozilla/Logging.h"
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using mozilla::LogLevel;
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extern mozilla::LazyLogModule gXULTemplateLog;
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#include "nsIRDFLiteral.h"
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nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
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nsXULTemplateQueryProcessorRDF* aProcessor,
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nsIAtom* aSourceVariable,
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nsIRDFResource* aProperty,
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nsIAtom* aTargetVariable)
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: nsRDFTestNode(aParent),
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mProcessor(aProcessor),
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mSourceVariable(aSourceVariable),
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mSource(nullptr),
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mProperty(aProperty),
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mTargetVariable(aTargetVariable),
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mTarget(nullptr)
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{
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* prop = "(null)";
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if (aProperty)
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aProperty->GetValueConst(&prop);
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nsAutoString svar(NS_LITERAL_STRING("(none)"));
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if (mSourceVariable)
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mSourceVariable->ToString(svar);
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nsAutoString tvar(NS_LITERAL_STRING("(none)"));
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if (mTargetVariable)
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mTargetVariable->ToString(tvar);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
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this, aParent, NS_ConvertUTF16toUTF8(svar).get(), prop, NS_ConvertUTF16toUTF8(tvar).get()));
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}
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}
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nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
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nsXULTemplateQueryProcessorRDF* aProcessor,
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nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIAtom* aTargetVariable)
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: nsRDFTestNode(aParent),
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mProcessor(aProcessor),
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mSourceVariable(0),
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mSource(aSource),
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mProperty(aProperty),
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mTargetVariable(aTargetVariable),
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mTarget(nullptr)
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{
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* source = "(null)";
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if (aSource)
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aSource->GetValueConst(&source);
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const char* prop = "(null)";
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if (aProperty)
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aProperty->GetValueConst(&prop);
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nsAutoString tvar(NS_LITERAL_STRING("(none)"));
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if (mTargetVariable)
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mTargetVariable->ToString(tvar);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
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this, aParent, source, prop, NS_ConvertUTF16toUTF8(tvar).get()));
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}
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}
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nsRDFPropertyTestNode::nsRDFPropertyTestNode(TestNode* aParent,
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nsXULTemplateQueryProcessorRDF* aProcessor,
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nsIAtom* aSourceVariable,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget)
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: nsRDFTestNode(aParent),
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mProcessor(aProcessor),
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mSourceVariable(aSourceVariable),
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mSource(nullptr),
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mProperty(aProperty),
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mTargetVariable(0),
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mTarget(aTarget)
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{
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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nsAutoString svar(NS_LITERAL_STRING("(none)"));
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if (mSourceVariable)
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mSourceVariable->ToString(svar);
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const char* prop = "(null)";
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if (aProperty)
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aProperty->GetValueConst(&prop);
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nsAutoString target;
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nsXULContentUtils::GetTextForNode(aTarget, target);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: parent=%p source=%s property=%s target=%s",
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this, aParent, NS_ConvertUTF16toUTF8(svar).get(), prop, NS_ConvertUTF16toUTF8(target).get()));
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}
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}
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nsresult
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nsRDFPropertyTestNode::FilterInstantiations(InstantiationSet& aInstantiations,
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bool* aCantHandleYet) const
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{
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nsresult rv;
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if (aCantHandleYet)
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*aCantHandleYet = false;
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nsIRDFDataSource* ds = mProcessor->GetDataSource();
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InstantiationSet::Iterator last = aInstantiations.Last();
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for (InstantiationSet::Iterator inst = aInstantiations.First(); inst != last; ++inst) {
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bool hasSourceBinding;
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nsCOMPtr<nsIRDFResource> sourceRes;
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if (mSource) {
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hasSourceBinding = true;
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sourceRes = mSource;
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}
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else {
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nsCOMPtr<nsIRDFNode> sourceValue;
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hasSourceBinding = inst->mAssignments.GetAssignmentFor(mSourceVariable,
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getter_AddRefs(sourceValue));
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sourceRes = do_QueryInterface(sourceValue);
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}
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bool hasTargetBinding;
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nsCOMPtr<nsIRDFNode> targetValue;
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if (mTarget) {
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hasTargetBinding = true;
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targetValue = mTarget;
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}
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else {
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hasTargetBinding = inst->mAssignments.GetAssignmentFor(mTargetVariable,
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getter_AddRefs(targetValue));
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}
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* source = "(unbound)";
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if (hasSourceBinding)
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sourceRes->GetValueConst(&source);
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nsAutoString target(NS_LITERAL_STRING("(unbound)"));
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if (hasTargetBinding)
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nsXULContentUtils::GetTextForNode(targetValue, target);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: FilterInstantiations() source=[%s] target=[%s]",
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this, source, NS_ConvertUTF16toUTF8(target).get()));
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}
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if (hasSourceBinding && hasTargetBinding) {
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// it's a consistency check. see if we have a assignment that is consistent
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bool hasAssertion;
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rv = ds->HasAssertion(sourceRes, mProperty, targetValue,
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true, &hasAssertion);
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if (NS_FAILED(rv)) return rv;
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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(" consistency check => %s", hasAssertion ? "passed" : "failed"));
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if (hasAssertion) {
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// it's consistent.
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Element* element =
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new nsRDFPropertyTestNode::Element(sourceRes, mProperty,
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targetValue);
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inst->AddSupportingElement(element);
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}
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else {
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// it's inconsistent. remove it.
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aInstantiations.Erase(inst--);
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}
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}
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else if ((hasSourceBinding && ! hasTargetBinding) ||
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(! hasSourceBinding && hasTargetBinding)) {
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// it's an open ended query on the source or
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// target. figure out what matches and add as a
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// cross-product.
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nsCOMPtr<nsISimpleEnumerator> results;
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if (hasSourceBinding) {
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rv = ds->GetTargets(sourceRes,
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mProperty,
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true,
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getter_AddRefs(results));
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}
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else {
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rv = ds->GetSources(mProperty,
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targetValue,
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true,
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getter_AddRefs(results));
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if (NS_FAILED(rv)) return rv;
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}
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while (1) {
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bool hasMore;
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rv = results->HasMoreElements(&hasMore);
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if (NS_FAILED(rv)) return rv;
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if (! hasMore)
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break;
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nsCOMPtr<nsISupports> isupports;
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rv = results->GetNext(getter_AddRefs(isupports));
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if (NS_FAILED(rv)) return rv;
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nsIAtom* variable;
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nsCOMPtr<nsIRDFNode> value;
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if (hasSourceBinding) {
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variable = mTargetVariable;
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value = do_QueryInterface(isupports);
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NS_ASSERTION(value != nullptr, "target is not an nsIRDFNode");
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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nsAutoString s(NS_LITERAL_STRING("(none found)"));
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if (value)
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nsXULContentUtils::GetTextForNode(value, s);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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(" target => %s", NS_ConvertUTF16toUTF8(s).get()));
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}
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if (! value) continue;
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targetValue = value;
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}
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else {
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variable = mSourceVariable;
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nsCOMPtr<nsIRDFResource> source = do_QueryInterface(isupports);
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NS_ASSERTION(source != nullptr, "source is not an nsIRDFResource");
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* s = "(none found)";
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if (source)
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source->GetValueConst(&s);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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(" source => %s", s));
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}
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if (! source) continue;
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value = sourceRes = source;
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}
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// Copy the original instantiation, and add it to the
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// instantiation set with the new assignment that we've
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// introduced. Ownership will be transferred to the
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Instantiation newinst = *inst;
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newinst.AddAssignment(variable, value);
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Element* element =
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new nsRDFPropertyTestNode::Element(sourceRes, mProperty,
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targetValue);
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newinst.AddSupportingElement(element);
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aInstantiations.Insert(inst, newinst);
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}
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// finally, remove the "under specified" instantiation.
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aInstantiations.Erase(inst--);
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}
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else {
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if (!aCantHandleYet) {
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nsXULContentUtils::LogTemplateError(ERROR_TEMPLATE_TRIPLE_UNBOUND);
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// Neither source nor target assignment!
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return NS_ERROR_UNEXPECTED;
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}
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*aCantHandleYet = true;
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return NS_OK;
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}
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}
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return NS_OK;
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}
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bool
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nsRDFPropertyTestNode::CanPropagate(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget,
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Instantiation& aInitialBindings) const
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{
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bool result;
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if ((mProperty.get() != aProperty) ||
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(mSource && mSource.get() != aSource) ||
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(mTarget && mTarget.get() != aTarget)) {
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result = false;
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}
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else {
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if (mSourceVariable)
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aInitialBindings.AddAssignment(mSourceVariable, aSource);
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if (mTargetVariable)
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aInitialBindings.AddAssignment(mTargetVariable, aTarget);
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result = true;
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}
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* source;
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aSource->GetValueConst(&source);
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const char* property;
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aProperty->GetValueConst(&property);
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nsAutoString target;
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nsXULContentUtils::GetTextForNode(aTarget, target);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: CanPropagate([%s]==[%s]=>[%s]) => %s",
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this, source, property, NS_ConvertUTF16toUTF8(target).get(),
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result ? "true" : "false"));
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}
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return result;
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}
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void
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nsRDFPropertyTestNode::Retract(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget) const
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{
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if (aProperty == mProperty.get()) {
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if (MOZ_LOG_TEST(gXULTemplateLog, LogLevel::Debug)) {
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const char* source;
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aSource->GetValueConst(&source);
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const char* property;
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aProperty->GetValueConst(&property);
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nsAutoString target;
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nsXULContentUtils::GetTextForNode(aTarget, target);
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MOZ_LOG(gXULTemplateLog, LogLevel::Debug,
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("nsRDFPropertyTestNode[%p]: Retract([%s]==[%s]=>[%s])",
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this, source, property, NS_ConvertUTF16toUTF8(target).get()));
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}
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mProcessor->RetractElement(Element(aSource, aProperty, aTarget));
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}
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}
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