Port of github.com/polymer/polymer.

pkg/polymer/lib/polymer.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Custom HTML tags, data binding, and templates for building
  * structured, encapsulated, client-side web apps.
  *
  * Polymer.dart, the next evolution of Web UI,
  * is an in-progress Dart port of the
@@ skipping 22 matching lines @@
  *
  * * [polymer.dart package](http://pub.dartlang.org/packages/polymer):
  * More details, such as the current major release number.
  *
  * * [Upgrading to Polymer.dart](http://www.dartlang.org/polymer-dart/upgrading-to-polymer-from-web-ui.html):
  * Tips for converting your apps from Web UI to Polymer.dart.
  */
 library polymer;
 
 import 'dart:async';
+import 'dart:collection' show HashMap;
+import 'dart:html';
+import 'dart:js' as js;
 import 'dart:mirrors';
 
+import 'package:custom_element/custom_element.dart';
+import 'package:logging/logging.dart' show Logger, Level;
 import 'package:mdv/mdv.dart' as mdv;
+import 'package:mdv/mdv.dart' show NodeBinding;
+import 'package:meta/meta.dart' show deprecated;
+import 'package:observe/observe.dart';
 import 'package:observe/src/microtask.dart';
 import 'package:path/path.dart' as path;
-import 'polymer_element.dart' show registerPolymerElement;
+import 'package:polymer_expressions/polymer_expressions.dart'
+    show PolymerExpressions;
+
+import 'deserialize.dart' as deserialize;
+import 'job.dart';
+import 'platform.dart' as platform;
 
 export 'package:custom_element/custom_element.dart';
 export 'package:observe/observe.dart';
 export 'package:observe/html.dart';
 export 'package:observe/src/microtask.dart';
 
-export 'polymer_element.dart';
-
-
-/** Annotation used to automatically register polymer elements. */
-class CustomTag {
-  final String tagName;
-  const CustomTag(this.tagName);
-}
-
-/**
- * Metadata used to label static or top-level methods that are called
- * automatically when loading the library of a custom element.
- */
-const initMethod = const _InitMethodAnnotation();
-
-/**
- * Initializes a polymer application as follows:
- *   * set up up polling for observable changes
- *   *  initialize MDV
- *   *  for each library in [libraries], register custom elements labeled with
- *      [CustomTag] and invoke the initialization method on it.
- *
- * The initialization on each library is either a method named `main` or
- * a top-level function and annotated with [initMethod].
- *
- * The urls in [libraries] can be absolute or relative to [srcUrl].
- */
-void initPolymer(List<String> libraries, [String srcUrl]) {
-  wrapMicrotask(() {
-    // DOM events don't yet go through microtasks, so we catch those here.
-    new Timer.periodic(new Duration(milliseconds: 125),
-        (_) => performMicrotaskCheckpoint());
-
-    // TODO(jmesserly): mdv should use initMdv instead of mdv.initialize.
-    mdv.initialize();
-    for (var lib in libraries) {
-      _loadLibrary(lib, srcUrl);
-    }
-  })();
-}
-
-/** All libraries in the current isolate. */
-final _libs = currentMirrorSystem().libraries;
-
-/**
- * Reads the library at [uriString] (which can be an absolute URI or a relative
- * URI from [srcUrl]), and:
- *
- *   * If present, invokes `main`.
- *
- *   * If present, invokes any top-level and static functions marked
- *     with the [initMethod] annotation (in the order they appear).
- *
- *   * Registers any [PolymerElement] that is marked with the [CustomTag]
- *     annotation.
- */
-void _loadLibrary(String uriString, [String srcUrl]) {
-  var uri = Uri.parse(uriString);
-  if (uri.scheme == '' && srcUrl != null) {
-    uri = Uri.parse(path.normalize(path.join(path.dirname(srcUrl), uriString)));
-  }
-  var lib = _libs[uri];
-  if (lib == null) {
-    print('warning: $uri library not found');
-    return;
-  }
-
-  // Invoke `main`, if present.
-  if (lib.functions[const Symbol('main')] != null) {
-    lib.invoke(const Symbol('main'), const []);
-  }
-
-  // Search top-level functions marked with @initMethod
-  for (var f in lib.functions.values) {
-    _maybeInvoke(lib, f);
-  }
-
-  for (var c in lib.classes.values) {
-    // Search for @CustomTag on classes
-    for (var m in c.metadata) {
-      var meta = m.reflectee;
-      if (meta is CustomTag) {
-        registerPolymerElement(meta.tagName,
-            () => c.newInstance(const Symbol(''), const []).reflectee);
-      }
-    }
-
-    // TODO(sigmund): check also static methods marked with @initMethod.
-    // This is blocked on two bugs:
-    //  - dartbug.com/12133 (static methods are incorrectly listed as top-level
-    //    in dart2js, so they end up being called twice)
-    //  - dartbug.com/12134 (sometimes "method.metadata" throws an exception,
-    //    we could wrap and hide those exceptions, but it's not ideal).
-  }
-}
-
-void _maybeInvoke(ObjectMirror obj, MethodMirror method) {
-  var annotationFound = false;
-  for (var meta in method.metadata) {
-    if (identical(meta.reflectee, initMethod)) {
-      annotationFound = true;
-      break;
-    }
-  }
-  if (!annotationFound) return;
-  if (!method.isStatic) {
-    print("warning: methods marked with @initMethod should be static,"
-        " ${method.simpleName} is not.");
-    return;
-  }
-  if (!method.parameters.where((p) => !p.isOptional).isEmpty) {
-    print("warning: methods marked with @initMethod should take no "
-        "arguments, ${method.simpleName} expects some.");
-    return;
-  }
-  obj.invoke(method.simpleName, const []);
-}
-
-class _InitMethodAnnotation {
-  const _InitMethodAnnotation();
-}
+part 'src/declaration.dart';
+part 'src/instance.dart';
+part 'src/loader.dart';