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/*******************************************************************************
* Copyright (c) 2010 Mat Booth and others.
* 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
*******************************************************************************/
package org.eclipse.dltk.sh.ui.text;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.dltk.sh.ui.IShellColorConstants;
import org.eclipse.dltk.ui.text.AbstractScriptScanner;
import org.eclipse.dltk.ui.text.IColorManager;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.WhitespaceRule;
/**
* Scans command substitution document partitions. I.e., the sections between
* back-ticks or enclosed in $()s.
*/
public class EvalScanner extends AbstractScriptScanner {
/**
* Array of preference keys used to define the style of token types used by
* this scanner.
*/
private static String fgTokenProperties[] = new String[] { IShellColorConstants.SHELL_EVAL,
IShellColorConstants.SHELL_VARIABLE };
public EvalScanner(IColorManager manager, IPreferenceStore store) {
super(manager, store);
initialize();
}
@Override
protected List<IRule> createRules() {
List<IRule> rules = new ArrayList<>();
// Token types used in the rules
IToken defaultToken = this.getToken(IShellColorConstants.SHELL_EVAL);
IToken varToken = this.getToken(IShellColorConstants.SHELL_VARIABLE);
// Add generic whitespace rule. This is here for efficiency reasons,
// there is a LOT of whitespace and when a token is detected the other
// rules are not evaluated.
rules.add(new WhitespaceRule(new WhitespaceDetector()));
rules.add(new DollarBraceCountingRule('{', '}', varToken, '\\'));
rules.add(new DollarRule(new DollarDetector(), defaultToken, varToken));
setDefaultReturnToken(defaultToken);
return rules;
}
@Override
protected String[] getTokenProperties() {
return fgTokenProperties;
}
}
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