Rationalize Dart mojo and sky package structure

sky/framework/elements/sky-element.sky

Index: sky/framework/elements/sky-element.sky
diff --git a/sky/framework/elements/sky-element.sky b/sky/framework/elements/sky-element.sky
deleted file mode 100644
index 5a4082316a3f08f5a716a48804a695a8c57c08f9..0000000000000000000000000000000000000000
--- a/sky/framework/elements/sky-element.sky
+++ /dev/null
@@ -1,164 +0,0 @@
-<!--
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
--->
-<script>
-import "dart:mirrors";
-import "dart:sky";
-
-typedef dynamic _Converter(String value);
-
-final Map<String, _Converter> _kAttributeConverters = {
-  'boolean': (String value) {
-    return value == 'true';
-  },
-  'number': (String value) {
-    try {
-      return double.parse(value);
-    } catch(_) {
-      return 0.0;
-    }
-  },
-  'string': (String value) {
-    return value == null ? '' : value;
-  },
-};
-
-class _Registration {
-  final Element template;
-  final Map<String, _Converter> attributes = new Map();
-
-  _Registration(this.template);
-
-  void parseAttributeSpec(definition) {
-    String spec = definition.getAttribute('attributes');
-    if (spec == null)
-      return;
-  
-    for (String token in spec.split(',')) {
-      List<String> parts = token.split(':');
-
-      if (parts.length != 2) {
-        window.console.error(
-            'Invalid attribute spec "${spec}", attributes must'
-            ' be {name}:{type}, where type is one of boolean, number or'
-            ' string.');
-        continue;
-      }
-  
-      var name = parts[0].trim();
-      var type = parts[1].trim();
-  
-      defineAttribute(name, type);
-    }
-  }
-
-  void defineAttribute(String name, String type) {
-    _Converter converter = _kAttributeConverters[type];
-
-    if (converter == null) {
-      window.console.error(
-          'Invalid attribute type "${type}", type must be one of boolean,'
-          ' number or string.');
-      return;
-    }
-
-    attributes[name] = converter;
-  }
-}
-
-final Map<String, _Registration> _registery = new Map<String, _Registration>();
-
-class Tagname {
-  final String name;
-  const Tagname(this.name);
-}
-
-String _getTagName(Type type) {
-  return reflectClass(type).metadata.firstWhere(
-      (i) => i.reflectee is Tagname).reflectee.name;
-}
-
-abstract class SkyElement extends Element {
-  // Override these functions to receive lifecycle notifications.
-  void created() {}
-  void attached() {}
-  void detached() {}
-  void attributeChanged(String attrName, String oldValue, String newValue) {}
-  void shadowRootReady() {}
-
-  String get tagName => _getTagName(runtimeType);
-  _Registration _registration;
-
-  SkyElement() {
-    _registration = _registery[tagName];
-    // Invoke attributeChanged callback when element is first created too.
-    // TODO(abarth): Is this necessary? We shouldn't have any attribute yet...
-    for (Attr attribute in getAttributes())
-      attributeChangedCallback(attribute.name, null, attribute.value);
-  }
-
-  attachedCallback() {
-    if (shadowRoot == null) {
-      if (_registration.template != null) {
-        ShadowRoot shadow = ensureShadowRoot();
-        Node content = _registration.template.content;
-        shadow.appendChild(document.importNode(content, deep: true));
-        shadowRootReady();
-      }
-    }
-    attached();
-  }
-
-  detachedCallback() {
-    detached();
-  }
-
-  attributeChangedCallback(name, oldValue, newValue) {
-    attributeChanged(name, oldValue, newValue);
-
-    _Converter converter = _registration.attributes[name];
-    if (converter == null)
-      return;
-    Symbol callback = new Symbol('${name}Changed');
-    InstanceMirror mirror = reflect(this);
-    if (mirror.type.instanceMembers.containsKey(callback))
-      mirror.invoke(callback, [converter(oldValue), converter(newValue)]);
-  }
-
-  noSuchMethod(Invocation invocation) {
-    String name = MirrorSystem.getName(invocation.memberName);
-    if (name.endsWith('='))
-      name = name.substring(0, name.length - 1);
-    _Converter converter = _registration.attributes[name];
-    if (converter != null) {
-      if (invocation.isGetter) {
-        return converter(getAttribute(name));
-      } else if (invocation.isSetter) {
-        setAttribute(name, invocation.positionalArguments[0].toString());
-        return;
-      }
-    }
-    return super.noSuchMethod(invocation);
-  }
-}
-
-void register(Element script, Type type) {
-  Element definition = script.parentNode;
-
-  if (definition.tagName != 'sky-element')
-    throw new UnsupportedError('register() calls must be inside a <sky-element>.');
-
-  ClassMirror mirror = reflectClass(type);
-  if (!mirror.isSubclassOf(reflectClass(SkyElement)))
-    throw new UnsupportedError('@Tagname can only be used on descendants of SkyElement');
-
-  String tagName = _getTagName(type);
-  Element template = definition.querySelector('template');
-
-  document.registerElement(tagName, type);
-  _registery[tagName] = new _Registration(template)
-                        ..parseAttributeSpec(definition);
-}
-</script>