diff options
Diffstat (limited to 'plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/VariableRule.java')
-rw-r--r-- | plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/VariableRule.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/VariableRule.java b/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/VariableRule.java new file mode 100644 index 0000000..750705a --- /dev/null +++ b/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/VariableRule.java | |||
@@ -0,0 +1,69 @@ | |||
1 | /***************************************************************************** | ||
2 | * Copyright (c) 2009 Ken Gilmer | ||
3 | * All rights reserved. This program and the accompanying materials | ||
4 | * are made available under the terms of the Eclipse Public License v1.0 | ||
5 | * which accompanies this distribution, and is available at | ||
6 | * http://www.eclipse.org/legal/epl-v10.html | ||
7 | * | ||
8 | * Contributors: | ||
9 | * Ken Gilmer - initial API and implementation | ||
10 | *******************************************************************************/ | ||
11 | package org.yocto.bc.ui.editors.bitbake; | ||
12 | |||
13 | import org.eclipse.jface.text.rules.ICharacterScanner; | ||
14 | import org.eclipse.jface.text.rules.IRule; | ||
15 | import org.eclipse.jface.text.rules.IToken; | ||
16 | import org.eclipse.jface.text.rules.Token; | ||
17 | |||
18 | final class VariableRule implements IRule { | ||
19 | |||
20 | /** Token to return for this rule */ | ||
21 | private final IToken fToken; | ||
22 | |||
23 | /** | ||
24 | * Creates a new operator rule. | ||
25 | * | ||
26 | * @param token | ||
27 | * Token to use for this rule | ||
28 | */ | ||
29 | public VariableRule(IToken token) { | ||
30 | fToken = token; | ||
31 | } | ||
32 | |||
33 | public IToken evaluate(ICharacterScanner scanner) { | ||
34 | if (scanner.getColumn() > 0) { | ||
35 | return Token.UNDEFINED; | ||
36 | } | ||
37 | |||
38 | int i = scanner.read(); | ||
39 | int c = 1; | ||
40 | |||
41 | if (!Character.isLetter(i) && i != 10) { | ||
42 | scanner.unread(); | ||
43 | return Token.UNDEFINED; | ||
44 | } | ||
45 | |||
46 | int p = i; | ||
47 | |||
48 | while (i != ICharacterScanner.EOF && i != 10) { | ||
49 | p = i; | ||
50 | i = scanner.read(); | ||
51 | c++; | ||
52 | |||
53 | if (i == '=') { | ||
54 | scanner.unread(); | ||
55 | |||
56 | if (p == '?' || p == '+') { | ||
57 | scanner.unread(); | ||
58 | } | ||
59 | return fToken; | ||
60 | } | ||
61 | } | ||
62 | |||
63 | for (int t = 0; t < c; t++) { | ||
64 | scanner.unread(); | ||
65 | } | ||
66 | |||
67 | return Token.UNDEFINED; | ||
68 | } | ||
69 | } \ No newline at end of file | ||