Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
LetToken |
|
| 2.6666666666666665;2.667 |
1 | // Copyright 2004, 2005 The Apache Software Foundation |
|
2 | // |
|
3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
|
4 | // you may not use this file except in compliance with the License. |
|
5 | // You may obtain a copy of the License at |
|
6 | // |
|
7 | // http://www.apache.org/licenses/LICENSE-2.0 |
|
8 | // |
|
9 | // Unless required by applicable law or agreed to in writing, software |
|
10 | // distributed under the License is distributed on an "AS IS" BASIS, |
|
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
12 | // See the License for the specific language governing permissions and |
|
13 | // limitations under the License. |
|
14 | ||
15 | package org.apache.tapestry.script; |
|
16 | ||
17 | import java.util.Map; |
|
18 | ||
19 | import org.apache.hivemind.Location; |
|
20 | ||
21 | /** |
|
22 | * Allows for the creation of new symbols that can be used in the script or |
|
23 | * returned to the caller. |
|
24 | * <p> |
|
25 | * The <let> tag wraps around static text and <insert> elements. The |
|
26 | * results are trimmed. |
|
27 | * |
|
28 | * @author Howard Lewis Ship |
|
29 | * @since 0.2.9 |
|
30 | */ |
|
31 | ||
32 | class LetToken extends AbstractToken |
|
33 | { |
|
34 | ||
35 | private String _key; |
|
36 | private boolean _unique; |
|
37 | 14 | private int _bufferLengthHighwater = 20; |
38 | ||
39 | public LetToken(String key, boolean unique, Location location) |
|
40 | { |
|
41 | 14 | super(location); |
42 | ||
43 | 14 | _key = key; |
44 | 14 | _unique = unique; |
45 | 14 | } |
46 | ||
47 | public void write(StringBuffer buffer, ScriptSession session) |
|
48 | { |
|
49 | 14 | if (buffer != null) throw new IllegalArgumentException(); |
50 | ||
51 | 14 | StringBuffer useBuffer = new StringBuffer(_bufferLengthHighwater); |
52 | ||
53 | 14 | writeChildren(useBuffer, session); |
54 | ||
55 | // Store the symbol back into the root set of symbols. |
|
56 | ||
57 | 14 | Map symbols = session.getSymbols(); |
58 | ||
59 | 14 | String value = useBuffer.toString().trim(); |
60 | ||
61 | 14 | if (_unique) { |
62 | 6 | value = session.getUniqueString(value); |
63 | ||
64 | // unique in scripts is mostly used to generate javascript identifiers |
|
65 | 6 | value = makeValidIdentifier(value); |
66 | } |
|
67 | ||
68 | 14 | symbols.put(_key, value); |
69 | ||
70 | // Store the buffer length from this run for the next run, since its |
|
71 | // going to be approximately the right size. |
|
72 | ||
73 | 14 | _bufferLengthHighwater = Math.max(_bufferLengthHighwater, useBuffer |
74 | .length()); |
|
75 | 14 | } |
76 | ||
77 | /** |
|
78 | * Replaces hyphens, colons and periods (which are allowed in html |
|
79 | * but not in javascript identifiers) with underscores. |
|
80 | */ |
|
81 | private static String makeValidIdentifier(String id) { |
|
82 | 6 | char[] chars = id.toCharArray(); |
83 | 70 | for (int i=0; i<chars.length; i++) { |
84 | 64 | char c = chars[i]; |
85 | 64 | if (c==':' || c=='-' || c=='.') |
86 | 5 | chars[i]='_'; |
87 | } |
|
88 | 6 | return new String(chars); |
89 | } |
|
90 | } |