port TemplateBinding to ed3266266e751b5ab1f75f8e0509d0d5f0ef35d8

pkg/template_binding/lib/src/instance_binding_map.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of template_binding;
+
+class _InstanceBindingMap {
+  final List bindings;
+  final List<_InstanceBindingMap> children;
+  final Node templateRef;
+  final bool hasSubTemplate;
+
+  _InstanceBindingMap._(this.bindings, this.children, this.templateRef,
+      this.hasSubTemplate);
+
+  factory _InstanceBindingMap(Node node, BindingDelegate delegate) {
+    var bindings = _getBindings(node, delegate);
+
+    bool hasSubTemplate = false;
+    Node templateRef = null;
+
+    if (isSemanticTemplate(node)) {
+      templateRef = node;
+      hasSubTemplate = true;
+    }
+
+    List children = null;
+    for (var c = node.firstChild, i = 0; c != null; c = c.nextNode, i++) {
+      var childMap = new _InstanceBindingMap(c, delegate);
+      if (childMap == null) continue;
+
+      if (children == null) children = new List(node.nodes.length);
+      children[i] = childMap;
+      if (childMap.hasSubTemplate) {
+        hasSubTemplate = true;
+      }
+    }
+
+    return new _InstanceBindingMap._(bindings, children, templateRef,
+        hasSubTemplate);
+  }
+}
+
+
+void _addMapBindings(Node node, _InstanceBindingMap map, model,
+    BindingDelegate delegate, List bound) {
+  if (map == null) return;
+
+  if (map.templateRef != null) {
+    TemplateBindExtension.decorate(node, map.templateRef);
+    if (delegate != null) {
+      templateBindFallback(node)._bindingDelegate = delegate;
+    }
+  }
+
+  if (map.bindings != null) {
+    _processBindings(map.bindings, node, model, bound);
+  }
+
+  if (map.children == null) return;
+
+  int i = 0;
+  for (var c = node.firstChild; c != null; c = c.nextNode) {
+    _addMapBindings(c, map.children[i++], model, delegate, bound);
+  }
+}