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Code Issues Releases Wiki Activity

Add thumbnail images to VSI (#415)

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* add thumbnail image generation

improves page load from 41.7 MB to 7.6 MB

* remove filesCreated set - thumbnails for each image are generated.

* set package:image version in pubspec

* Update grind.dart
This commit is contained in:
John Ryan
2020-04-17 13:55:12 -07:00
committed by GitHub
parent 5a5cc8a62f
commit 8763d754ad
6 changed files with 46 additions and 3 deletions
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33
web/samples_index/tool/grind.dart
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@@ -10,6 +10,7 @@ import 'package:path/path.dart' as path;
import 'package:samples_index/samples_index.dart';
import 'package:samples_index/src/templates.dart' as templates;
import 'package:samples_index/cookbook.dart';
import 'package:image/image.dart' as image;
void main(args) => grind(args);
@@ -22,7 +23,7 @@ void analyze() {
}
@Task('deploy')
@Depends(analyze, testCli, generate, buildRelease)
@Depends(analyze, testCli, generate, createThumbnails, buildRelease)
void deploy() {
print('All tasks completed. To deploy to Firebase, run:');
print('');
@@ -82,6 +83,36 @@ Future scrapeCookbook() async {
}
}
@Task('creates thumbnail images in web/images')
Future createThumbnails() async {
await _createThumbnails(Directory('web/images'));
await _createThumbnails(Directory('web/images/cookbook'));
}
// Creates a thumbnail image for each png file
Future _createThumbnails(Directory directory) async {
var files = await directory.list().toList();
var filesToWrite = <Future>{};
for (var entity in files) {
var extension = path.extension(entity.path);
var filename = path.basenameWithoutExtension(entity.path);
if (extension != '.png' || entity is! File || filename.endsWith('_thumb')) {
continue;
}
var file = entity as File;
var pathPrefix = path.dirname(file.path);
var thumbnailFile = File(path.join(pathPrefix, filename + '_thumb.png'));
var img = image.decodeImage(await file.readAsBytes());
var resized = image.copyResize(img, width: 640);
filesToWrite.add(thumbnailFile.writeAsBytes(image.encodePng(resized)));
}
await Future.wait(filesToWrite);
}
@Task('remove generated HTML files')
Future clean() async {
var tasks = <Future>[];