1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/xul/templates/src/nsXMLBinding.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,143 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 "nsXULTemplateQueryProcessorXML.h"
1.10 +#include "nsXULTemplateResultXML.h"
1.11 +#include "nsXMLBinding.h"
1.12 +
1.13 +NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(nsXMLBindingSet)
1.14 +NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(nsXMLBindingSet)
1.15 +
1.16 +NS_IMPL_CYCLE_COLLECTION_CLASS(nsXMLBindingSet)
1.17 +
1.18 +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsXMLBindingSet)
1.19 + nsXMLBinding* binding = tmp->mFirst;
1.20 + while (binding) {
1.21 + binding->mExpr = nullptr;
1.22 + binding = binding->mNext;
1.23 + }
1.24 +NS_IMPL_CYCLE_COLLECTION_UNLINK_END
1.25 +
1.26 +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsXMLBindingSet)
1.27 + nsXMLBinding* binding = tmp->mFirst;
1.28 + while (binding) {
1.29 + NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "nsXMLBinding::mExpr");
1.30 + cb.NoteXPCOMChild(binding->mExpr);
1.31 + binding = binding->mNext;
1.32 + }
1.33 +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
1.34 +
1.35 +NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsXMLBindingSet, AddRef)
1.36 +NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsXMLBindingSet, Release)
1.37 +
1.38 +nsresult
1.39 +nsXMLBindingSet::AddBinding(nsIAtom* aVar, nsIDOMXPathExpression* aExpr)
1.40 +{
1.41 + nsAutoPtr<nsXMLBinding> newbinding(new nsXMLBinding(aVar, aExpr));
1.42 + NS_ENSURE_TRUE(newbinding, NS_ERROR_OUT_OF_MEMORY);
1.43 +
1.44 + if (mFirst) {
1.45 + nsXMLBinding* binding = mFirst;
1.46 +
1.47 + while (binding) {
1.48 + // if the target variable is already used in a binding, ignore it
1.49 + // since it won't be useful for anything
1.50 + if (binding->mVar == aVar)
1.51 + return NS_OK;
1.52 +
1.53 + // add the binding at the end of the list
1.54 + if (!binding->mNext) {
1.55 + binding->mNext = newbinding;
1.56 + break;
1.57 + }
1.58 +
1.59 + binding = binding->mNext;
1.60 + }
1.61 + }
1.62 + else {
1.63 + mFirst = newbinding;
1.64 + }
1.65 +
1.66 + return NS_OK;
1.67 +}
1.68 +
1.69 +int32_t
1.70 +nsXMLBindingSet::LookupTargetIndex(nsIAtom* aTargetVariable,
1.71 + nsXMLBinding** aBinding)
1.72 +{
1.73 + int32_t idx = 0;
1.74 + nsXMLBinding* binding = mFirst;
1.75 +
1.76 + while (binding) {
1.77 + if (binding->mVar == aTargetVariable) {
1.78 + *aBinding = binding;
1.79 + return idx;
1.80 + }
1.81 + idx++;
1.82 + binding = binding->mNext;
1.83 + }
1.84 +
1.85 + *aBinding = nullptr;
1.86 + return -1;
1.87 +}
1.88 +
1.89 +void
1.90 +nsXMLBindingValues::GetAssignmentFor(nsXULTemplateResultXML* aResult,
1.91 + nsXMLBinding* aBinding,
1.92 + int32_t aIndex,
1.93 + uint16_t aType,
1.94 + nsIDOMXPathResult** aValue)
1.95 +{
1.96 + *aValue = mValues.SafeObjectAt(aIndex);
1.97 +
1.98 + if (!*aValue) {
1.99 + nsCOMPtr<nsIDOMNode> contextNode;
1.100 + aResult->GetNode(getter_AddRefs(contextNode));
1.101 + if (contextNode) {
1.102 + nsCOMPtr<nsISupports> resultsupports;
1.103 + aBinding->mExpr->Evaluate(contextNode, aType,
1.104 + nullptr, getter_AddRefs(resultsupports));
1.105 +
1.106 + nsCOMPtr<nsIDOMXPathResult> result = do_QueryInterface(resultsupports);
1.107 + if (result && mValues.ReplaceObjectAt(result, aIndex))
1.108 + *aValue = result;
1.109 + }
1.110 + }
1.111 +
1.112 + NS_IF_ADDREF(*aValue);
1.113 +}
1.114 +
1.115 +void
1.116 +nsXMLBindingValues::GetNodeAssignmentFor(nsXULTemplateResultXML* aResult,
1.117 + nsXMLBinding* aBinding,
1.118 + int32_t aIndex,
1.119 + nsIDOMNode** aNode)
1.120 +{
1.121 + nsCOMPtr<nsIDOMXPathResult> result;
1.122 + GetAssignmentFor(aResult, aBinding, aIndex,
1.123 + nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE,
1.124 + getter_AddRefs(result));
1.125 +
1.126 + if (result)
1.127 + result->GetSingleNodeValue(aNode);
1.128 + else
1.129 + *aNode = nullptr;
1.130 +}
1.131 +
1.132 +void
1.133 +nsXMLBindingValues::GetStringAssignmentFor(nsXULTemplateResultXML* aResult,
1.134 + nsXMLBinding* aBinding,
1.135 + int32_t aIndex,
1.136 + nsAString& aValue)
1.137 +{
1.138 + nsCOMPtr<nsIDOMXPathResult> result;
1.139 + GetAssignmentFor(aResult, aBinding, aIndex,
1.140 + nsIDOMXPathResult::STRING_TYPE, getter_AddRefs(result));
1.141 +
1.142 + if (result)
1.143 + result->GetStringValue(aValue);
1.144 + else
1.145 + aValue.Truncate();
1.146 +}
