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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsXULTemplateQueryProcessorXML.h"
#include "nsXULTemplateResultXML.h"
#include "nsXMLBinding.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/XPathResult.h"
using namespace mozilla;
using namespace mozilla::dom;
nsXMLBindingSet::~nsXMLBindingSet()
{}
void
nsXMLBindingSet::AddBinding(nsIAtom* aVar, nsAutoPtr<XPathExpression>&& aExpr)
{
nsAutoPtr<nsXMLBinding> newbinding(new nsXMLBinding(aVar, Move(aExpr)));
if (mFirst) {
nsXMLBinding* binding = mFirst;
while (binding) {
// if the target variable is already used in a binding, ignore it
// since it won't be useful for anything
if (binding->mVar == aVar)
return;
// add the binding at the end of the list
if (!binding->mNext) {
binding->mNext = newbinding;
return;
}
binding = binding->mNext;
}
}
else {
mFirst = newbinding;
}
}
int32_t
nsXMLBindingSet::LookupTargetIndex(nsIAtom* aTargetVariable,
nsXMLBinding** aBinding)
{
int32_t idx = 0;
nsXMLBinding* binding = mFirst;
while (binding) {
if (binding->mVar == aTargetVariable) {
*aBinding = binding;
return idx;
}
idx++;
binding = binding->mNext;
}
*aBinding = nullptr;
return -1;
}
XPathResult*
nsXMLBindingValues::GetAssignmentFor(nsXULTemplateResultXML* aResult,
nsXMLBinding* aBinding,
int32_t aIndex,
uint16_t aType)
{
XPathResult* value = mValues.SafeElementAt(aIndex);
if (value) {
return value;
}
nsINode* contextNode = aResult->Node();
if (!contextNode) {
return nullptr;
}
mValues.EnsureLengthAtLeast(aIndex + 1);
ErrorResult ignored;
mValues[aIndex] = aBinding->mExpr->Evaluate(*contextNode, aType, nullptr,
ignored);
return mValues[aIndex];
}
nsINode*
nsXMLBindingValues::GetNodeAssignmentFor(nsXULTemplateResultXML* aResult,
nsXMLBinding* aBinding,
int32_t aIndex)
{
XPathResult* result = GetAssignmentFor(aResult, aBinding, aIndex,
XPathResult::FIRST_ORDERED_NODE_TYPE);
ErrorResult rv;
return result ? result->GetSingleNodeValue(rv) : nullptr;
}
void
nsXMLBindingValues::GetStringAssignmentFor(nsXULTemplateResultXML* aResult,
nsXMLBinding* aBinding,
int32_t aIndex,
nsAString& aValue)
{
XPathResult* result = GetAssignmentFor(aResult, aBinding, aIndex,
XPathResult::STRING_TYPE);
if (result) {
ErrorResult rv;
result->GetStringValue(aValue, rv);
} else {
aValue.Truncate();
}
}
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