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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 /** Transfomer that combines multiple dart script tags into a single one. */ | 5 /** Transfomer that combines multiple dart script tags into a single one. */ |
6 library polymer.src.transform.script_compactor; | 6 library polymer.src.transform.script_compactor; |
7 | 7 |
8 import 'dart:async'; | 8 import 'dart:async'; |
9 | 9 |
10 import 'package:barback/barback.dart'; | 10 import 'package:barback/barback.dart'; |
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31 Future<bool> isPrimary(Asset input) => | 31 Future<bool> isPrimary(Asset input) => |
32 new Future.value(input.id.extension == ".html"); | 32 new Future.value(input.id.extension == ".html"); |
33 | 33 |
34 Future apply(Transform transform) { | 34 Future apply(Transform transform) { |
35 var id = transform.primaryId; | 35 var id = transform.primaryId; |
36 var logger = transform.logger; | 36 var logger = transform.logger; |
37 return getPrimaryContent(transform).then((content) { | 37 return getPrimaryContent(transform).then((content) { |
38 var document = parseHtml(content, id.path, logger); | 38 var document = parseHtml(content, id.path, logger); |
39 var libraries = []; | 39 var libraries = []; |
40 bool changed = false; | 40 bool changed = false; |
| 41 var dartLoaderTag = null; |
41 for (var tag in document.queryAll('script')) { | 42 for (var tag in document.queryAll('script')) { |
| 43 var src = tag.attributes['src']; |
| 44 if (src != null) { |
| 45 if (src == 'packages/polymer/boot.js') { |
| 46 tag.remove(); |
| 47 continue; |
| 48 } |
| 49 var last = src.split('/').last; |
| 50 if (last == 'dart.js' || last == 'testing.js') { |
| 51 dartLoaderTag = tag; |
| 52 } |
| 53 } |
42 if (tag.attributes['type'] != 'application/dart') continue; | 54 if (tag.attributes['type'] != 'application/dart') continue; |
43 tag.remove(); | 55 tag.remove(); |
44 changed = true; | 56 changed = true; |
45 var src = tag.attributes['src']; | |
46 if (src == null) { | 57 if (src == null) { |
47 logger.warning('unexpected script without a src url. The ' | 58 logger.warning('unexpected script without a src url. The ' |
48 'ScriptCompactor transformer should run after running the ' | 59 'ScriptCompactor transformer should run after running the ' |
49 'InlineCodeExtractor', tag.sourceSpan); | 60 'InlineCodeExtractor', tag.sourceSpan); |
50 continue; | 61 continue; |
51 } | 62 } |
52 var libraryId = resolve(id, src, logger, tag.sourceSpan); | 63 var libraryId = resolve(id, src, logger, tag.sourceSpan); |
53 | 64 |
54 // TODO(sigmund): should we detect/remove duplicates? | 65 // TODO(sigmund): should we detect/remove duplicates? |
55 if (libraryId == null) continue; | 66 if (libraryId == null) continue; |
56 libraries.add(libraryId); | 67 libraries.add(libraryId); |
57 } | 68 } |
58 | 69 |
59 if (!changed) { | 70 if (!changed) { |
60 transform.addOutput(new Asset.fromString(id, content)); | 71 transform.addOutput(new Asset.fromString(id, content)); |
61 return; | 72 return; |
62 } | 73 } |
63 | 74 |
64 var bootstrapId = id.addExtension('_bootstrap.dart'); | 75 var bootstrapId = id.addExtension('_bootstrap.dart'); |
65 var filename = path.url.basename(bootstrapId.path); | 76 var filename = path.url.basename(bootstrapId.path); |
66 document.body.nodes.add(parseFragment( | 77 |
67 '<script type="application/dart" src="$filename"></script>')); | 78 var bootstrapScript = parseFragment( |
| 79 '<script type="application/dart" src="$filename"></script>'); |
| 80 if (dartLoaderTag == null) { |
| 81 document.body.nodes.add(bootstrapScript); |
| 82 document.body.nodes.add(parseFragment('<script type="text/javascript" ' |
| 83 'src="packages/browser/dart.js"></script>')); |
| 84 } else if (dartLoaderTag.parent != document.body) { |
| 85 document.body.nodes.add(bootstrapScript); |
| 86 } else { |
| 87 document.body.insertBefore(bootstrapScript, dartLoaderTag); |
| 88 } |
68 | 89 |
69 var urls = libraries.map((id) => importUrlFor(id, bootstrapId, logger)) | 90 var urls = libraries.map((id) => importUrlFor(id, bootstrapId, logger)) |
70 .where((url) => url != null).toList(); | 91 .where((url) => url != null).toList(); |
71 var buffer = new StringBuffer()..write(_header); | 92 var buffer = new StringBuffer()..write(_header); |
72 for (int i = 0; i < urls.length; i++) { | 93 for (int i = 0; i < urls.length; i++) { |
73 buffer.writeln("import '${urls[i]}' as i$i;"); | 94 buffer.writeln("import '${urls[i]}' as i$i;"); |
74 } | 95 } |
75 buffer..write(_mainPrefix) | 96 buffer..write(_mainPrefix) |
76 ..writeAll(urls.map((url) => " '$url',\n")) | 97 ..writeAll(urls.map((url) => " '$url',\n")) |
77 ..write(_mainSuffix); | 98 ..write(_mainSuffix); |
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90 if (id.path.startsWith('lib/')) { | 111 if (id.path.startsWith('lib/')) { |
91 return 'package:${id.package}/${id.path.substring(4)}'; | 112 return 'package:${id.package}/${id.path.substring(4)}'; |
92 } | 113 } |
93 | 114 |
94 // Use relative urls only if it's possible. | 115 // Use relative urls only if it's possible. |
95 if (id.package != sourceId.package) { | 116 if (id.package != sourceId.package) { |
96 logger.error("don't know how to import $id from $sourceId"); | 117 logger.error("don't know how to import $id from $sourceId"); |
97 return null; | 118 return null; |
98 } | 119 } |
99 | 120 |
100 var urlBuilder = path.url; | 121 var builder = path.url; |
101 var upPath = urlBuilder.joinAll( | 122 return builder.relative(builder.join('/', id.path), |
102 urlBuilder.split(sourceId.path).map((_) => '..')); | 123 from: builder.join('/', builder.dirname(sourceId.path))); |
103 return urlBuilder.normalize( | |
104 urlBuilder.join(sourceId.path, upPath, id.path)); | |
105 } | 124 } |
106 } | 125 } |
107 | 126 |
108 const _header = """ | 127 const _header = """ |
109 library app_bootstrap; | 128 library app_bootstrap; |
110 | 129 |
111 import 'package:polymer/polymer.dart'; | 130 import 'package:polymer/polymer.dart'; |
112 import 'dart:mirrors' show currentMirrorSystem; | 131 import 'dart:mirrors' show currentMirrorSystem; |
113 | 132 |
114 """; | 133 """; |
115 | 134 |
116 const _mainPrefix = """ | 135 const _mainPrefix = """ |
117 | 136 |
118 void main() { | 137 void main() { |
119 initPolymer([ | 138 initPolymer([ |
120 """; | 139 """; |
121 | 140 |
122 // TODO(sigmund): investigate alternative to get the baseUri (dartbug.com/12612) | 141 // TODO(sigmund): investigate alternative to get the baseUri (dartbug.com/12612) |
123 const _mainSuffix = """ | 142 const _mainSuffix = """ |
124 ], currentMirrorSystem().isolate.rootLibrary.uri.toString()); | 143 ], currentMirrorSystem().isolate.rootLibrary.uri.toString()); |
125 } | 144 } |
126 """; | 145 """; |
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