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Unified Diff: packages/polymer/lib/src/build/polyfill_injector.dart

Issue 2312183003: Removed Polymer from Observatory deps (Closed)
Patch Set: Created 4 years, 3 months ago
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Index: packages/polymer/lib/src/build/polyfill_injector.dart
diff --git a/packages/polymer/lib/src/build/polyfill_injector.dart b/packages/polymer/lib/src/build/polyfill_injector.dart
deleted file mode 100644
index b5b9e04ac17e9c836c2711d324959610c4421c4e..0000000000000000000000000000000000000000
--- a/packages/polymer/lib/src/build/polyfill_injector.dart
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright (c) 2013, 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.
-
-/// Includes any additional polyfills that may needed by the deployed app.
-library polymer.src.build.polyfill_injector;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:html/dom.dart'
- show Document, DocumentFragment, Element, Node;
-import 'package:html/parser.dart' show parseFragment;
-import 'package:code_transformers/messages/build_logger.dart';
-import 'package:path/path.dart' as path;
-import 'package:web_components/transformer.dart' show testAttribute;
-import 'common.dart';
-
-/// Ensures that any scripts and polyfills needed to run a polymer application
-/// are included.
-///
-/// This step also replaces "packages/browser/dart.js" and the Dart script tag
-/// with a script tag that loads the dart2js compiled code directly.
-class PolyfillInjector extends Transformer with PolymerTransformer {
- final TransformOptions options;
-
- PolyfillInjector(this.options);
-
- /// Only run on entry point .html files.
- bool isPrimary(AssetId id) => options.isHtmlEntryPoint(id);
-
- Future apply(Transform transform) {
- var logger = new BuildLogger(transform,
- convertErrorsToWarnings: !options.releaseMode,
- detailsUri: 'http://goo.gl/5HPeuP');
- return readPrimaryAsHtml(transform, logger).then((document) {
- bool dartSupportFound = false;
- Element webComponentsJs;
- Element dartJs;
- final dartScripts = <Element>[];
-
- for (var tag in document.querySelectorAll('script')) {
- var src = tag.attributes['src'];
- if (src != null) {
- var last = src.split('/').last;
- if (_webComponentsJS.hasMatch(last)) {
- webComponentsJs = tag;
- } else if (_platformJS.hasMatch(last)) {
- tag.attributes['src'] =
- src.replaceFirst(_platformJS, 'webcomponents.min.js');
- webComponentsJs = tag;
- } else if (_dartSupportJS.hasMatch(last)) {
- dartSupportFound = true;
- } else if (_browserDartJS.hasMatch(src)) {
- dartJs = tag;
- }
- }
-
- if (tag.attributes['type'] == 'application/dart') {
- dartScripts.add(tag);
- }
- }
-
- if (dartScripts.isEmpty) {
- // This HTML has no Dart code, there is nothing to do here.
- transform.addOutput(transform.primaryInput);
- return;
- }
-
- // Remove "packages/browser/dart.js". It is not needed in release mode,
- // and in debug mode we want to ensure it is the last script on the page.
- if (dartJs != null) dartJs.remove();
-
- // TODO(jmesserly): ideally we would generate an HTML that loads
- // dart2dart too. But for now dart2dart is not a supported deployment
- // target, so just inline the JS script. This has the nice side effect of
- // fixing our tests: even if content_shell supports Dart VM, we'll still
- // test the compiled JS code.
- if (options.directlyIncludeJS) {
- // Replace all other Dart script tags with JavaScript versions.
- for (var script in dartScripts) {
- /// Don't modify scripts that were originally <link rel="x-test-dart">
- /// tags.
- if (script.attributes.containsKey(testAttribute)) continue;
-
- final src = script.attributes['src'];
- if (src.endsWith('.dart')) {
- script.attributes.remove('type');
- script.attributes['src'] = '$src.js';
- // TODO(sigmund): we shouldn't need 'async' here. Remove this
- // workaround for dartbug.com/19653.
- script.attributes['async'] = '';
- }
- }
- } else {
- document.body.nodes.add(
- parseFragment('<script src="packages/browser/dart.js"></script>'));
- }
-
- _addScript(urlSegment, [Element parent, int position]) {
- if (parent == null) parent = document.head;
- // Default to either the top of `parent` or right after the <base> tag.
- if (position == null) {
- var base = parent.querySelector('base');
- if (base != null) {
- position = parent.nodes.indexOf(base) + 1;
- } else {
- position = 0;
- }
- }
- var pathToPackages =
- '../' * (path.url.split(transform.primaryInput.id.path).length - 2);
- parent.nodes.insert(position, parseFragment(
- '<script src="${pathToPackages}packages/$urlSegment"></script>'));
- }
-
- // Inserts dart_support.js either at the top of the document or directly
- // after webcomponents.js if it exists.
- if (!dartSupportFound) {
- if (webComponentsJs == null) {
- _addScript('web_components/dart_support.js');
- } else {
- var parentNode = webComponentsJs.parentNode;
- _addScript('web_components/dart_support.js', parentNode,
- parentNode.nodes.indexOf(webComponentsJs) + 1);
- }
- }
-
- // By default webcomponents.js should come before all other scripts.
- if (webComponentsJs == null && options.injectWebComponentsJs) {
- var suffix = options.releaseMode ? '.min.js' : '.js';
- _addScript('web_components/webcomponents$suffix');
- }
-
- transform.addOutput(
- new Asset.fromString(transform.primaryInput.id, document.outerHtml));
- });
- }
-}
-
-final _platformJS = new RegExp(r'platform.*\.js', caseSensitive: false);
-final _webComponentsJS =
- new RegExp(r'webcomponents.*\.js', caseSensitive: false);
-final _dartSupportJS = new RegExp(r'dart_support.js', caseSensitive: false);
-final _browserDartJS =
- new RegExp(r'packages/browser/dart.js', caseSensitive: false);
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