Index: runtime/bin/vmservice/observatory/deployed/web/packages/polymer/boot.js |
diff --git a/runtime/bin/vmservice/observatory/deployed/web/packages/polymer/boot.js b/runtime/bin/vmservice/observatory/deployed/web/packages/polymer/boot.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..bdb1df4f4e630ad53b07772830bbdc2c9f3430fc |
--- /dev/null |
+++ b/runtime/bin/vmservice/observatory/deployed/web/packages/polymer/boot.js |
@@ -0,0 +1,133 @@ |
+// Copyright (c) 2014, 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. |
+ |
+/// Experimental bootstrap to initialize polymer applications. This library is |
+/// not used by default, and may be replaced by Dart code in the near future. |
+/// |
+/// This script contains logic to bootstrap polymer apps during development. It |
+/// internally discovers Dart script tags through HTML imports, and constructs |
+/// a new entrypoint for the application that is then launched in an isolate. |
+/// |
+/// For each script tag found, we will load the corresponding Dart library and |
+/// execute all methods annotated with `@initMethod` and register all classes |
+/// labeled with `@CustomTag`. We keep track of the order of imports and execute |
+/// initializers in the same order. |
+/// |
+/// You can this experimental bootstrap logic by including the |
+/// polymer_experimental.html import, instead of polymer.html: |
+/// |
+/// <link rel="import" href="packages/polymer/polymer_experimental.html"> |
+/// |
+/// This bootstrap replaces `initPolymer` so Dart code might need to be changed |
+/// too. If you loaded init.dart directly, you can remove it. But if you invoke |
+/// initPolymer in your main, you should remove that call and change to use |
+/// `@initMethod` instead. The current bootstrap doesn't support having Dart |
+/// script tags in the main page, so you may need to move some code into an HTML |
+/// import. For example, If you need to run some initialization code before any |
+/// other code is executed, include an HTML import to an html file with a |
+/// "application/dart" script tag that contains an initializer |
+/// method with the body of your old main, and make sure this tag is placed |
+/// above other html-imports that load the rest of the application. |
+/// Initialization methods are executed in the order in which they are |
+/// discovered in the HTML document. |
+(function() { |
+ // Only run in Dartium. |
+ if (!navigator.dartEnabled && |
+ // TODO(sigmund): remove userAgent check once 1.6 rolls as stable. |
+ // See: dartbug.com/18463 |
+ (navigator.userAgent.indexOf('(Dart)') === -1)) { |
+ return; |
+ } |
+ |
+ // Extract a Dart import URL from a script tag, which is the 'src' attribute |
+ // of the script tag, or a data-url with the script contents for inlined code. |
+ function getScriptUrl(script) { |
+ var url = script.src; |
+ if (url) { |
+ // Normalize package: urls |
+ var index = url.indexOf('packages/'); |
+ if (index == 0 || (index > 0 && url[index - 1] == '/')) { |
+ url = "package:" + url.slice(index + 9); |
+ } |
+ return url; |
+ } |
+ |
+ // TODO(sigmund): change back to application/dart: using application/json is |
+ // wrong but it hides a warning in Dartium (dartbug.com/18000). |
+ return "data:application/json;base64," + window.btoa(script.textContent); |
+ } |
+ |
+ // Creates a Dart program that imports [urls] and passes them to |
+ // startPolymerInDevelopment, which in turn will invoke methods marked with |
+ // @initMethod, and register any custom tag labeled with @CustomTag in those |
+ // libraries. |
+ function createMain(urls, mainUrl) { |
+ var imports = Array(urls.length + 1); |
+ for (var i = 0; i < urls.length; ++i) { |
+ imports[i] = 'import "' + urls[i] + '" as i' + i + ';'; |
+ } |
+ imports[urls.length] = 'import "package:polymer/src/mirror_loader.dart";'; |
+ var arg = urls.length == 0 ? '[]' : |
+ ('[\n "' + urls.join('",\n "') + '"\n ]'); |
+ return (imports.join('\n') + |
+ '\n\nmain() {\n' + |
+ ' startPolymerInDevelopment(' + arg + ');\n' + |
+ '}\n'); |
+ } |
+ |
+ function discoverScripts(content, state, importedDoc) { |
+ if (!state) { |
+ // internal state tracking documents we've visited, the resulting list of |
+ // scripts, and any tags with the incorrect mime-type. |
+ state = {seen: {}, scripts: [], badTags: []}; |
+ } |
+ if (!content) return state; |
+ |
+ // Note: we visit both script and link-imports together to ensure we |
+ // preserve the order of the script tags as they are discovered. |
+ var nodes = content.querySelectorAll('script,link[rel="import"]'); |
+ for (var i = 0; i < nodes.length; i++) { |
+ var node = nodes[i]; |
+ if (node instanceof HTMLLinkElement) { |
+ // TODO(jmesserly): figure out why ".import" fails in content_shell but |
+ // works in Dartium. |
+ if (node.import && node.import.href) node = node.import; |
+ |
+ if (state.seen[node.href]) continue; |
+ state.seen[node.href] = node; |
+ discoverScripts(node.import, state, true); |
+ } else if (node instanceof HTMLScriptElement) { |
+ if (node.type != 'application/dart') continue; |
+ if (importedDoc) { |
+ state.scripts.push(getScriptUrl(node)); |
+ } else { |
+ state.badTags.push(node); |
+ } |
+ } |
+ } |
+ return state; |
+ } |
+ |
+ // TODO(jmesserly): we're using this function because DOMContentLoaded can |
+ // be fired too soon: https://www.w3.org/Bugs/Public/show_bug.cgi?id=23526 |
+ HTMLImports.whenReady(function() { |
+ // Append a new script tag that initializes everything. |
+ var newScript = document.createElement('script'); |
+ newScript.type = "application/dart"; |
+ |
+ var results = discoverScripts(document); |
+ if (results.badTags.length > 0) { |
+ console.warn('The experimental polymer boostrap does not support ' |
+ + 'having script tags in the main document. You can move the script ' |
+ + 'tag to an HTML import instead. Also make sure your script tag ' |
+ + 'doesn\'t have a main, but a top-level method marked with ' |
+ + '@initMethod instead'); |
+ for (var i = 0; i < results.badTags.length; i++) { |
+ console.warn(results.badTags[i]); |
+ } |
+ } |
+ newScript.textContent = createMain(results.scripts); |
+ document.body.appendChild(newScript); |
+ }); |
+})(); |