import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/xul/templates/nsXMLBinding.cpp

@@ -0,0 +1,118 @@
+/* -*- 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();
+  }
+}