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Unified Diff: runtime/bin/vmservice/observatory/deployed/web/packages/polymer/boot.js

Issue 839543002: Revert "Build Observatory with runtime" (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 5 years, 11 months ago
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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);
+ });
+})();

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