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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 extracts inlined script code into separate assets. */ | 5 /** Transfomer that extracts inlined script code into separate assets. */ |
6 library polymer.src.transformers; | 6 library polymer.src.transformers; |
7 | 7 |
8 import 'dart:async'; | 8 import 'dart:async'; |
9 | 9 |
10 import 'package:barback/barback.dart'; | 10 import 'package:barback/barback.dart'; |
11 import 'package:path/path.dart' as path; | 11 import 'package:path/path.dart' as path; |
12 | 12 |
13 import 'common.dart'; | 13 import 'common.dart'; |
14 | 14 |
15 /** | 15 /** |
16 * Transformer that extracts Dart code inlined in HTML script tags and outputs a | 16 * Transformer that extracts Dart code inlined in HTML script tags and outputs a |
17 * separate file for each. | 17 * separate file for each. |
18 */ | 18 */ |
19 class InlineCodeExtractor extends Transformer { | 19 class InlineCodeExtractor extends Transformer { |
20 Future<bool> isPrimary(Asset input) => | 20 Future<bool> isPrimary(Asset input) => |
21 new Future.value(input.id.extension == ".html"); | 21 new Future.value(input.id.extension == ".html"); |
22 | 22 |
23 Future apply(Transform transform) { | 23 Future apply(Transform transform) { |
24 var inputId = transform.primaryId; | 24 var inputId = transform.primaryId; |
25 return getPrimaryContent(transform).then((content) { | 25 return getPrimaryContent(transform).then((content) { |
26 var document = parseHtml(content, inputId.path, transform.logger); | 26 var document = parseHtml(content, inputId.path, transform.logger); |
27 int count = 0; | 27 int count = 0; |
| 28 bool htmlChanged = false; |
28 for (var tag in document.queryAll('script')) { | 29 for (var tag in document.queryAll('script')) { |
29 if (tag.attributes['type'] == 'application/dart' && | 30 // Only process tags that have inline Dart code |
30 !tag.attributes.containsKey('src')) { | 31 if (tag.attributes['type'] != 'application/dart' || |
31 // TODO(sigmund): should we automatically include a library directive | 32 tag.attributes.containsKey('src')) { |
32 // if it doesn't have one? | 33 continue; |
33 var filename = path.url.basename(inputId.path); | |
34 tag.attributes['src'] = '$filename.$count.dart'; | |
35 var textContent = tag.nodes.first; | |
36 var id = inputId.addExtension('.$count.dart'); | |
37 transform.addOutput(new Asset.fromString(id, textContent.value)); | |
38 textContent.remove(); | |
39 count++; | |
40 } | 34 } |
| 35 htmlChanged = true; |
| 36 |
| 37 // Remove empty tags |
| 38 if (tag.nodes.length == 0) { |
| 39 tag.remove(); |
| 40 continue; |
| 41 } |
| 42 |
| 43 // TODO(sigmund): should we automatically include a library directive |
| 44 // if it doesn't have one? |
| 45 var filename = path.url.basename(inputId.path); |
| 46 // TODO(sigmund): ensure this filename is unique (dartbug.com/12618). |
| 47 tag.attributes['src'] = '$filename.$count.dart'; |
| 48 var textContent = tag.nodes.first; |
| 49 var id = inputId.addExtension('.$count.dart'); |
| 50 transform.addOutput(new Asset.fromString(id, textContent.value)); |
| 51 textContent.remove(); |
| 52 count++; |
41 } | 53 } |
42 transform.addOutput(new Asset.fromString(inputId, | 54 transform.addOutput(new Asset.fromString(inputId, |
43 count == 0 ? content : document.outerHtml)); | 55 htmlChanged ? document.outerHtml : content)); |
44 }); | 56 }); |
45 } | 57 } |
46 } | 58 } |
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