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Side by Side Diff: dart/pkg/polymer/lib/src/loader.dart

Issue 336013003: Version 1.5.0-dev.4.14 (Closed) Base URL: http://dart.googlecode.com/svn/trunk/
Patch Set: Created 6 years, 6 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 part of polymer; 5 part of polymer;
6 6
7 /// Annotation used to automatically register polymer elements. 7 /// Annotation used to automatically register polymer elements.
8 class CustomTag { 8 class CustomTag {
9 final String tagName; 9 final String tagName;
10 const CustomTag(this.tagName); 10 const CustomTag(this.tagName);
(...skipping 37 matching lines...) Expand 10 before | Expand all | Expand 10 after
48 /// using the experimental bootstrap API, this would be invoked by an entry 48 /// using the experimental bootstrap API, this would be invoked by an entry
49 /// point that is automatically generated somehow. In particular, during 49 /// point that is automatically generated somehow. In particular, during
50 /// development, the entry point would be generated dynamically in `boot.js`. 50 /// development, the entry point would be generated dynamically in `boot.js`.
51 /// Similarly, pub-build would generate the entry point for deployment. 51 /// Similarly, pub-build would generate the entry point for deployment.
52 void startPolymer(List<Function> initializers, [bool deployMode = true]) { 52 void startPolymer(List<Function> initializers, [bool deployMode = true]) {
53 if (_startPolymerCalled) throw 'Initialization was already done.'; 53 if (_startPolymerCalled) throw 'Initialization was already done.';
54 _startPolymerCalled = true; 54 _startPolymerCalled = true;
55 _hookJsPolymer(); 55 _hookJsPolymer();
56 _deployMode = deployMode; 56 _deployMode = deployMode;
57 57
58 if (initializers == null) {
59 throw 'Missing initialization of polymer elements. '
60 'Please check that the list of entry points in your pubspec.yaml '
61 'is correct. If you are using pub-serve, you may need to restart it.';
62 }
63
64 Polymer.registerSync('d-auto-binding', AutoBindingElement,
65 extendsTag: 'template');
66
58 for (var initializer in initializers) { 67 for (var initializer in initializers) {
59 initializer(); 68 initializer();
60 } 69 }
61 } 70 }
62 71
63 /// Configures [initPolymer] making it optimized for deployment to the internet. 72 /// Configures [initPolymer] making it optimized for deployment to the internet.
64 /// With this setup the initializer list is supplied instead of searched for 73 /// With this setup the initializer list is supplied instead of searched for
65 /// at runtime. Additionally, after this method is called [initPolymer] omits 74 /// at runtime. Additionally, after this method is called [initPolymer] omits
66 /// the [Zone] that automatically invokes [Observable.dirtyCheck]. 75 /// the [Zone] that automatically invokes [Observable.dirtyCheck].
67 void configureForDeployment(List<Function> initializers) { 76 void configureForDeployment(List<Function> initializers) {
68 loader.initializers = initializers; 77 loader.initializers = initializers;
69 loader.deployMode = true; 78 loader.deployMode = true;
70 } 79 }
71 80
72 /// To ensure Dart can interoperate with polymer-element registered by 81 /// To ensure Dart can interoperate with polymer-element registered by
73 /// polymer.js, we need to be able to execute Dart code if we are registering 82 /// polymer.js, we need to be able to execute Dart code if we are registering
74 /// a Dart class for that element. We trigger Dart logic by patching 83 /// a Dart class for that element. We trigger Dart logic by patching
75 /// polymer-element's register function and: 84 /// polymer-element's register function and:
76 /// 85 ///
77 /// * if it has a Dart class, run PolymerDeclaration's register. 86 /// * if it has a Dart class, run PolymerDeclaration's register.
78 /// * otherwise it is a JS prototype, run polymer-element's normal register. 87 /// * otherwise it is a JS prototype, run polymer-element's normal register.
79 void _hookJsPolymer() { 88 void _hookJsPolymer() {
89 // Note: platform.js is not used directly here, but we check that it is loaded
90 // to provide a good error message in Dartium if people forgot to include it.
91 // Otherwise, polymer.js below will fail with a hard to understand error
92 // message.
93 var platform = js.context['Platform'];
94 if (platform == null) {
95 throw new StateError('platform.js, dart_support.js must be loaded at'
96 ' the top of your application, before any other scripts or HTML'
97 ' imports that use polymer. Putting these two script tags at the top of'
98 ' your <head> element should address this issue:'
99 ' <script src="packages/web_components/platform.js"></script> and '
100 ' <script src="packages/web_components/dart_support.js"></script>.');
101 }
80 var polymerJs = js.context['Polymer']; 102 var polymerJs = js.context['Polymer'];
81 if (polymerJs == null) { 103 if (polymerJs == null) {
82 throw new StateError('polymer.js must be loaded before polymer.dart, please' 104 throw new StateError('polymer.js must be loaded before polymer.dart, please'
83 ' add <link rel="import" href="packages/polymer/polymer.html"> to your' 105 ' add <link rel="import" href="packages/polymer/polymer.html"> to your'
84 ' <head> before any Dart scripts. Alternatively you can get a different' 106 ' <head> before any Dart scripts. Alternatively you can get a different'
85 ' version of polymer.js by following the instructions at' 107 ' version of polymer.js by following the instructions at'
86 ' http://www.polymer-project.org; if you do that be sure to include' 108 ' http://www.polymer-project.org.');
87 ' the platform polyfills.');
88 } 109 }
89 110
90 // TODO(jmesserly): dart:js appears to not callback in the correct zone: 111 // TODO(jmesserly): dart:js appears to not callback in the correct zone:
91 // https://code.google.com/p/dart/issues/detail?id=17301 112 // https://code.google.com/p/dart/issues/detail?id=17301
92 var zone = Zone.current; 113 var zone = Zone.current;
93 114
94 polymerJs.callMethod('whenPolymerReady', 115 polymerJs.callMethod('whenPolymerReady',
95 [zone.bindCallback(() => Polymer._ready.complete())]); 116 [zone.bindCallback(() => Polymer._onReady.complete())]);
96 117
97 var polyElem = document.createElement('polymer-element'); 118 JsFunction originalRegister = _polymerElementProto['register'];
98 var proto = new JsObject.fromBrowserObject(polyElem)['__proto__'];
99 if (proto is Node) proto = new JsObject.fromBrowserObject(proto);
100
101 JsFunction originalRegister = proto['register'];
102 if (originalRegister == null) { 119 if (originalRegister == null) {
103 throw new StateError('polymer.js must expose "register" function on ' 120 throw new StateError('polymer.js must expose "register" function on '
104 'polymer-element to enable polymer.dart to interoperate.'); 121 'polymer-element to enable polymer.dart to interoperate.');
105 } 122 }
106 123
107 registerDart(jsElem, String name, String extendee) { 124 registerDart(jsElem, String name, String extendee) {
108 // By the time we get here, we'll know for sure if it is a Dart object 125 // By the time we get here, we'll know for sure if it is a Dart object
109 // or not, because polymer-element will wait for us to notify that 126 // or not, because polymer-element will wait for us to notify that
110 // the @CustomTag was found. 127 // the @CustomTag was found.
111 final type = _getRegisteredType(name); 128 final type = _getRegisteredType(name);
112 if (type != null) { 129 if (type != null) {
113 final extendsDecl = _getDeclaration(extendee); 130 final extendsDecl = _getDeclaration(extendee);
114 return zone.run(() => 131 return zone.run(() =>
115 new PolymerDeclaration(jsElem, name, type, extendsDecl).register()); 132 new PolymerDeclaration(jsElem, name, type, extendsDecl).register());
116 } 133 }
117 // It's a JavaScript polymer element, fall back to the original register. 134 // It's a JavaScript polymer element, fall back to the original register.
118 return originalRegister.apply([name, extendee], thisArg: jsElem); 135 return originalRegister.apply([name, extendee], thisArg: jsElem);
119 } 136 }
120 137
121 proto['register'] = new JsFunction.withThis(registerDart); 138 _polymerElementProto['register'] = new JsFunction.withThis(registerDart);
122 } 139 }
140
141 // Note: we cache this so we can use it later to look up 'init'.
142 // See registerSync.
143 JsObject _polymerElementProto = () {
144 var polyElem = document.createElement('polymer-element');
145 var proto = new JsObject.fromBrowserObject(polyElem)['__proto__'];
146 if (proto is Node) proto = new JsObject.fromBrowserObject(proto);
147 return proto;
148 }();
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