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/*******************************************************************************
* Copyright (c) 2013 Pivotal Software, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Pivotal Software, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.text.quicksearch.internal.core.preferences;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.text.quicksearch.internal.core.priority.DefaultPriorityFunction;
import org.eclipse.text.quicksearch.internal.ui.QuickSearchActivator;
import org.eclipse.text.quicksearch.internal.util.LineReader;
/**
* Helper class to access the QuickSearch Preferences.
*
* @author Kris De Volder
*/
public class QuickSearchPreferences {
//Keys used to fetch 'raw' preferences values from the preferences store.
public static final String IGNORED_EXTENSIONS = "ignored.extensions";
public static final String IGNORED_NAMES = "ignored.names";
public static final String IGNORED_PREFIXES = "ignored.prefixes";
public static final String MAX_LINE_LEN = "LineReader.MAX_LINE_LEN";
private static boolean initializedDefaults;
private IPreferenceStore store;
public QuickSearchPreferences(IPreferenceStore preferenceStore) {
this.store = preferenceStore;
initializeDefaults();
}
public String[] getIgnoredExtensions() {
return getAndParseStringList(IGNORED_EXTENSIONS);
}
public String[] getIgnoredPrefixes() {
return getAndParseStringList(IGNORED_PREFIXES);
}
public String[] getIgnoredNames() {
return getAndParseStringList(IGNORED_NAMES);
}
public int getMaxLineLen() {
return store.getInt(MAX_LINE_LEN);
}
private String[] getAndParseStringList(String key) {
String raw = store.getString(key);
if (raw!=null) {
return parseStringList(raw);
}
return null;
}
/**
* Takes a raw string list as entered in the prefs page input field and parses it.
* <p>
* Commas and newline are treated as 'separators' between elements. Further, any trailing
* and leading whitespace is stripped from individual elements and empty strings are silently
* dropped.
*/
private String[] parseStringList(String raw) {
String[] elements = raw.split("[,\n]");
List<String> list = new ArrayList<String>(elements.length);
for (String e : elements) {
e = e.trim();
if (!"".equals(e)) {
list.add(e);
}
}
return list.toArray(new String[list.size()]);
}
public static void initializeDefaults() {
if (!initializedDefaults) {
initializedDefaults = true;
IPreferenceStore store = QuickSearchActivator.getDefault().getPreferenceStore();
store.setDefault(QuickSearchPreferences.MAX_LINE_LEN, LineReader.DEFAULT_MAX_LINE_LENGTH);
DefaultPriorityFunction dpf = new DefaultPriorityFunction();
store.setDefault(QuickSearchPreferences.IGNORED_EXTENSIONS, encode(dpf.ignoredExtensions));
store.setDefault(QuickSearchPreferences.IGNORED_NAMES, encode(dpf.ignoredNames));
store.setDefault(QuickSearchPreferences.IGNORED_PREFIXES, encode(dpf.ignoredPrefixes));
}
}
private static String encode(String[] strings) {
StringBuilder encoded = new StringBuilder();
for (int i = 0; i < strings.length; i++) {
if (i>0) {
encoded.append(", ");
}
encoded.append(strings[i]);
}
return encoded.toString();
}
}
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