Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(147)

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

Issue 180373003: [polymer] switch comment style (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 10 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch | Annotate | Revision Log
OLDNEW
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);
11 } 11 }
12 12
13 /** 13 /// Metadata used to label static or top-level methods that are called
14 * Metadata used to label static or top-level methods that are called 14 /// automatically when loading the library of a custom element.
15 * automatically when loading the library of a custom element.
16 */
17 const initMethod = const _InitMethodAnnotation(); 15 const initMethod = const _InitMethodAnnotation();
18 16
19 /** 17 /// Initializes a polymer application as follows:
20 * Initializes a polymer application as follows: 18 /// * set up up polling for observable changes
21 * * set up up polling for observable changes 19 /// * initialize Model-Driven Views
22 * * initialize Model-Driven Views 20 /// * Include some style to prevent flash of unstyled content (FOUC)
23 * * Include some style to prevent flash of unstyled content (FOUC) 21 /// * for each library included transitively from HTML and HTML imports,
24 * * for each library included transitively from HTML and HTML imports, 22 /// register custom elements declared there (labeled with [CustomTag]) and
25 * register custom elements declared there (labeled with [CustomTag]) and 23 /// invoke the initialization method on it (top-level functions annotated with
26 * invoke the initialization method on it (top-level functions annotated with 24 /// [initMethod]).
27 * [initMethod]).
28 */
29 Zone initPolymer() { 25 Zone initPolymer() {
30 // We use this pattern, and not the inline lazy initialization pattern, so we 26 // We use this pattern, and not the inline lazy initialization pattern, so we
31 // can help dart2js detect that _discoverInitializers can be tree-shaken for 27 // can help dart2js detect that _discoverInitializers can be tree-shaken for
32 // deployment (and hence all uses of dart:mirrors from this loading logic). 28 // deployment (and hence all uses of dart:mirrors from this loading logic).
33 // TODO(sigmund): fix polymer's transformers so they can replace initPolymer 29 // TODO(sigmund): fix polymer's transformers so they can replace initPolymer
34 // by initPolymerOptimized. 30 // by initPolymerOptimized.
35 if (_initializers == null) _initializers = _discoverInitializers(); 31 if (_initializers == null) _initializers = _discoverInitializers();
36 32
37 // In deployment mode, we rely on change notifiers instead of dirty checking. 33 // In deployment mode, we rely on change notifiers instead of dirty checking.
38 if (!_deployMode) { 34 if (!_deployMode) {
39 return dirtyCheckZone()..run(initPolymerOptimized); 35 return dirtyCheckZone()..run(initPolymerOptimized);
40 } 36 }
41 37
42 return initPolymerOptimized(); 38 return initPolymerOptimized();
43 } 39 }
44 40
45 /** 41 /// Same as [initPolymer], but runs the version that is optimized for deployment
46 * Same as [initPolymer], but runs the version that is optimized for deployment 42 /// to the internet. The biggest difference is it omits the [Zone] that
47 * to the internet. The biggest difference is it omits the [Zone] that 43 /// automatically invokes [Observable.dirtyCheck], and the list of initializers
48 * automatically invokes [Observable.dirtyCheck], and the list of initializers 44 /// must be supplied instead of being dynamically searched for at runtime using
49 * must be supplied instead of being dynamically searched for at runtime using 45 /// mirrors.
50 * mirrors.
51 */
52 Zone initPolymerOptimized() { 46 Zone initPolymerOptimized() {
53 // TODO(sigmund): refactor this so we can replace it by codegen. 47 // TODO(sigmund): refactor this so we can replace it by codegen.
54 smoke.useMirrors(); 48 smoke.useMirrors();
55 // TODO(jmesserly): there is some code in src/declaration/polymer-element.js, 49 // TODO(jmesserly): there is some code in src/declaration/polymer-element.js,
56 // git version 37eea00e13b9f86ab21c85a955585e8e4237e3d2, right before 50 // git version 37eea00e13b9f86ab21c85a955585e8e4237e3d2, right before
57 // it registers polymer-element, which uses Platform.deliverDeclarations to 51 // it registers polymer-element, which uses Platform.deliverDeclarations to
58 // coordinate with HTML Imports. I don't think we need it so skipping. 52 // coordinate with HTML Imports. I don't think we need it so skipping.
59 document.register(PolymerDeclaration._TAG, PolymerDeclaration); 53 document.register(PolymerDeclaration._TAG, PolymerDeclaration);
60 54
61 for (var initializer in _initializers) { 55 for (var initializer in _initializers) {
62 initializer(); 56 initializer();
63 } 57 }
64 58
65 // Run this after user code so they can add to Polymer.veiledElements 59 // Run this after user code so they can add to Polymer.veiledElements
66 _preventFlashOfUnstyledContent(); 60 _preventFlashOfUnstyledContent();
67 61
68 customElementsReady.then((_) => Polymer._ready.complete()); 62 customElementsReady.then((_) => Polymer._ready.complete());
69 return Zone.current; 63 return Zone.current;
70 } 64 }
71 65
72 /** 66 /// Configures [initPolymer] making it optimized for deployment to the internet.
73 * Configures [initPolymer] making it optimized for deployment to the internet. 67 /// With this setup the initializer list is supplied instead of searched for
74 * With this setup the initializer list is supplied instead of being dynamically 68 /// at runtime. Additionally, after this method is called [initPolymer] omits
75 * searched for at runtime. Additionally, after this method is called, 69 /// the [Zone] that automatically invokes [Observable.dirtyCheck].
76 * [initPolymer] omits the [Zone] that automatically invokes
77 * [Observable.dirtyCheck].
78 */
79 void configureForDeployment(List<Function> initializers) { 70 void configureForDeployment(List<Function> initializers) {
80 _initializers = initializers; 71 _initializers = initializers;
81 _deployMode = true; 72 _deployMode = true;
82 } 73 }
83 74
84 /** 75 /// List of initializers that by default will be executed when calling
85 * List of initializers that by default will be executed when calling 76 /// initPolymer. If null, initPolymer will compute the list of initializers by
86 * initPolymer. If null, initPolymer will compute the list of initializers by 77 /// crawling HTML imports, searchfing for script tags, and including an
87 * crawling HTML imports, searchfing for script tags, and including an 78 /// initializer for each type tagged with a [CustomTag] annotation and for each
88 * initializer for each type tagged with a [CustomTag] annotation and for each 79 /// top-level method annotated with [initMethod]. The value of this field is
89 * top-level method annotated with [initMethod]. The value of this field is 80 /// assigned programatically by the code generated from the polymer deploy
90 * assigned programatically by the code generated from the polymer deploy 81 /// scripts.
91 * scripts.
92 */
93 List<Function> _initializers; 82 List<Function> _initializers;
94 83
95 /** True if we're in deployment mode. */ 84 /// True if we're in deployment mode.
96 bool _deployMode = false; 85 bool _deployMode = false;
97 86
98 List<Function> _discoverInitializers() { 87 List<Function> _discoverInitializers() {
99 var initializers = []; 88 var initializers = [];
100 var librariesToLoad = _discoverScripts(document, window.location.href); 89 var librariesToLoad = _discoverScripts(document, window.location.href);
101 for (var lib in librariesToLoad) { 90 for (var lib in librariesToLoad) {
102 try { 91 try {
103 _loadLibrary(lib, initializers); 92 _loadLibrary(lib, initializers);
104 } catch (e, s) { 93 } catch (e, s) {
105 // Deliver errors async, so if a single library fails it doesn't prevent 94 // Deliver errors async, so if a single library fails it doesn't prevent
106 // other things from loading. 95 // other things from loading.
107 new Completer().completeError(e, s); 96 new Completer().completeError(e, s);
108 } 97 }
109 } 98 }
110 return initializers; 99 return initializers;
111 } 100 }
112 101
113 /** 102 /// Walks the HTML import structure to discover all script tags that are
114 * Walks the HTML import structure to discover all script tags that are 103 /// implicitly loaded. This code is only used in Dartium and should only be
115 * implicitly loaded. This code is only used in Dartium and should only be 104 /// called after all HTML imports are resolved. Polymer ensures this by asking
116 * called after all HTML imports are resolved. Polymer ensures this by asking 105 /// users to put their Dart script tags after all HTML imports (this is checked
117 * users to put their Dart script tags after all HTML imports (this is checked 106 /// by the linter, and Dartium will otherwise show an error message).
118 * by the linter, and Dartium will otherwise show an error message).
119 */
120 List<String> _discoverScripts(Document doc, String baseUri, 107 List<String> _discoverScripts(Document doc, String baseUri,
121 [Set<Document> seen, List<String> scripts]) { 108 [Set<Document> seen, List<String> scripts]) {
122 if (seen == null) seen = new Set<Document>(); 109 if (seen == null) seen = new Set<Document>();
123 if (scripts == null) scripts = <String>[]; 110 if (scripts == null) scripts = <String>[];
124 if (doc == null) { 111 if (doc == null) {
125 print('warning: $baseUri not found.'); 112 print('warning: $baseUri not found.');
126 return scripts; 113 return scripts;
127 } 114 }
128 if (seen.contains(doc)) return scripts; 115 if (seen.contains(doc)) return scripts;
129 seen.add(doc); 116 seen.add(doc);
130 117
131 bool scriptSeen = false; 118 bool scriptSeen = false;
132 for (var node in doc.querySelectorAll('script,link[rel="import"]')) { 119 for (var node in doc.querySelectorAll('script,link[rel="import"]')) {
133 if (node is LinkElement) { 120 if (node is LinkElement) {
134 _discoverScripts(node.import, node.href, seen, scripts); 121 _discoverScripts(node.import, node.href, seen, scripts);
135 } else if (node is ScriptElement && node.type == 'application/dart') { 122 } else if (node is ScriptElement && node.type == 'application/dart') {
136 if (!scriptSeen) { 123 if (!scriptSeen) {
137 var url = node.src; 124 var url = node.src;
138 scripts.add(url == '' ? baseUri : url); 125 scripts.add(url == '' ? baseUri : url);
139 scriptSeen = true; 126 scriptSeen = true;
140 } else { 127 } else {
141 print('warning: more than one Dart script tag in $baseUri. Dartium ' 128 print('warning: more than one Dart script tag in $baseUri. Dartium '
142 'currently only allows a single Dart script tag per document.'); 129 'currently only allows a single Dart script tag per document.');
143 } 130 }
144 } 131 }
145 } 132 }
146 return scripts; 133 return scripts;
147 } 134 }
148 135
149 /** All libraries in the current isolate. */ 136 /// All libraries in the current isolate.
150 final _libs = currentMirrorSystem().libraries; 137 final _libs = currentMirrorSystem().libraries;
151 138
152 // TODO(sigmund): explore other (cheaper) ways to resolve URIs relative to the 139 // TODO(sigmund): explore other (cheaper) ways to resolve URIs relative to the
153 // root library (see dartbug.com/12612) 140 // root library (see dartbug.com/12612)
154 final _rootUri = currentMirrorSystem().isolate.rootLibrary.uri; 141 final _rootUri = currentMirrorSystem().isolate.rootLibrary.uri;
155 142
156 final Logger _loaderLog = new Logger('polymer.loader'); 143 final Logger _loaderLog = new Logger('polymer.loader');
157 144
158 bool _isHttpStylePackageUrl(Uri uri) { 145 bool _isHttpStylePackageUrl(Uri uri) {
159 var uriPath = uri.path; 146 var uriPath = uri.path;
160 return uri.scheme == _rootUri.scheme && 147 return uri.scheme == _rootUri.scheme &&
161 // Don't process cross-domain uris. 148 // Don't process cross-domain uris.
162 uri.authority == _rootUri.authority && 149 uri.authority == _rootUri.authority &&
163 uriPath.endsWith('.dart') && 150 uriPath.endsWith('.dart') &&
164 (uriPath.contains('/packages/') || uriPath.startsWith('packages/')); 151 (uriPath.contains('/packages/') || uriPath.startsWith('packages/'));
165 } 152 }
166 153
167 /** 154 /// Reads the library at [uriString] (which can be an absolute URI or a relative
168 * Reads the library at [uriString] (which can be an absolute URI or a relative 155 /// URI from the root library), and:
169 * URI from the root library), and: 156 ///
170 * 157 /// * If present, invokes any top-level and static functions marked
171 * * If present, invokes any top-level and static functions marked 158 /// with the [initMethod] annotation (in the order they appear).
172 * with the [initMethod] annotation (in the order they appear). 159 ///
173 * 160 /// * Registers any [PolymerElement] that is marked with the [CustomTag]
174 * * Registers any [PolymerElement] that is marked with the [CustomTag] 161 /// annotation.
175 * annotation.
176 */
177 void _loadLibrary(String uriString, List<Function> initializers) { 162 void _loadLibrary(String uriString, List<Function> initializers) {
178 var uri = _rootUri.resolve(uriString); 163 var uri = _rootUri.resolve(uriString);
179 var lib = _libs[uri]; 164 var lib = _libs[uri];
180 if (_isHttpStylePackageUrl(uri)) { 165 if (_isHttpStylePackageUrl(uri)) {
181 // Use package: urls if available. This rule here is more permissive than 166 // Use package: urls if available. This rule here is more permissive than
182 // how we translate urls in polymer-build, but we expect Dartium to limit 167 // how we translate urls in polymer-build, but we expect Dartium to limit
183 // the cases where there are differences. The polymer-build issues an error 168 // the cases where there are differences. The polymer-build issues an error
184 // when using packages/ inside lib without properly stepping out all the way 169 // when using packages/ inside lib without properly stepping out all the way
185 // to the packages folder. If users don't create symlinks in the source 170 // to the packages folder. If users don't create symlinks in the source
186 // tree, then Dartium will also complain because it won't find the file seen 171 // tree, then Dartium will also complain because it won't find the file seen
(...skipping 53 matching lines...) Expand 10 before | Expand all | Expand 10 after
240 print("warning: methods marked with @initMethod should take no " 225 print("warning: methods marked with @initMethod should take no "
241 "arguments, ${method.simpleName} expects some."); 226 "arguments, ${method.simpleName} expects some.");
242 return; 227 return;
243 } 228 }
244 initializers.add(() => obj.invoke(method.simpleName, const [])); 229 initializers.add(() => obj.invoke(method.simpleName, const []));
245 } 230 }
246 231
247 class _InitMethodAnnotation { 232 class _InitMethodAnnotation {
248 const _InitMethodAnnotation(); 233 const _InitMethodAnnotation();
249 } 234 }
OLDNEW

Powered by Google App Engine
This is Rietveld 408576698