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Side by Side Diff: utils/dartdoc/utils.dart

Issue 9555013: Get dartdoc in the SDK and working correctly. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Update copyright date. Created 8 years, 9 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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.
4
5 // Generic utility functions.
6
7 /** Invokes [callback] and returns how long it took to execute in ms. */
8 num time(callback()) {
9 final watch = new Stopwatch();
10 watch.start();
11 callback();
12 watch.stop();
13 return watch.elapsedInMs();
14 }
15
16 /** Turns [name] into something that's safe to use as a file name. */
17 String sanitize(String name) => name.replaceAll(':', '_').replaceAll('/', '_');
18
19 /** Returns the number of times [search] occurs in [text]. */
20 int countOccurrences(String text, String search) {
21 int start = 0;
22 int count = 0;
23
24 while (true) {
25 start = text.indexOf(search, start);
26 if (start == -1) break;
27 count++;
28 // Offsetting by search length means overlapping results are not counted.
29 start += search.length;
30 }
31
32 return count;
33 }
34
35 /** Repeats [text] [count] times, separated by [separator] if given. */
36 String repeat(String text, int count, [String separator]) {
37 // TODO(rnystrom): Should be in corelib.
38 final buffer = new StringBuffer();
39 for (int i = 0; i < count; i++) {
40 buffer.add(text);
41 if ((i < count - 1) && (separator !== null)) buffer.add(separator);
42 }
43
44 return buffer.toString();
45 }
46
47 /** Removes up to [indentation] leading whitespace characters from [text]. */
48 String unindent(String text, int indentation) {
49 var start;
50 for (start = 0; start < Math.min(indentation, text.length); start++) {
51 // Stop if we hit a non-whitespace character.
52 if (text[start] != ' ') break;
53 }
54
55 return text.substring(start);
56 }
57
58 /** Sorts the map by the key, doing a case-insensitive comparison. */
59 List orderByName(Map<String, Dynamic> map) {
60 // TODO(rnystrom): it'd be nice to have this in corelib.
61 List keys = map.getKeys();
62 keys.sort((x, y) => x.toUpperCase().compareTo(y.toUpperCase()));
63 final values = [];
64 for (var k in keys) {
65 values.add(map[k]);
66 }
67 return values;
68 }
69
70 /**
71 * Joins [items] into a single, comma-separated string using [conjunction].
72 * E.g. `['A', 'B', 'C']` becomes `"A, B, and C"`.
73 */
74 String joinWithCommas(List<String> items, [String conjunction = 'and']) {
75 if (items.length == 1) return items[0];
76 if (items.length == 2) return "${items[0]} $conjunction ${items[1]}";
77 return Strings.join(items.getRange(0, items.length - 1), ', ') +
78 ', $conjunction ' + items[items.length - 1];
79 }
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