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 @@
+/*****************************************************************************
+ * Copyright (c) 2009 Ken Gilmer
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Ken Gilmer - initial API and implementation
+ *******************************************************************************/
+package org.yocto.bc.ui.editors.bitbake;
+
+import org.eclipse.jface.text.rules.ICharacterScanner;
+import org.eclipse.jface.text.rules.IRule;
+import org.eclipse.jface.text.rules.IToken;
+import org.eclipse.jface.text.rules.Token;
+
+final class VariableRule implements IRule {
+
+        /** Token to return for this rule */
+        private final IToken fToken;
+
+        /**
+         * Creates a new operator rule.
+         * 
+         * @param token
+         *            Token to use for this rule
+         */
+        public VariableRule(IToken token) {
+                fToken = token;
+        }
+
+        public IToken evaluate(ICharacterScanner scanner) {
+                if (scanner.getColumn() > 0) {
+                        return Token.UNDEFINED;
+                }
+
+                int i = scanner.read();
+                int c = 1;
+                
+                if (!Character.isLetter(i) && i != 10) {
+                        scanner.unread();
+                        return Token.UNDEFINED;
+                }
+
+                int p = i;
+
+                while (i != ICharacterScanner.EOF && i != 10) {
+                        p = i;
+                        i = scanner.read();
+                        c++;
+                        
+                        if (i == '=') {
+                                scanner.unread();
+
+                                if (p == '?' || p == '+') {
+                                        scanner.unread();
+                                }
+                                return fToken;
+                        }
+                }
+
+                for (int t = 0; t < c; t++) {
+                        scanner.unread();
+                }
+                
+                return Token.UNDEFINED;
+        }
+}
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