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/*******************************************************************************
* Copyright (c) 2010, 2017 IBM Corporation 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ui.wizards;
import java.util.Vector;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.team.internal.ui.TeamUIPlugin;
public abstract class PsfStore {
// Most recently used filename is first in the array.
// Least recently used filename is at the end of the list.
// When the list overflows, items drop off the end.
private static final int HISTORY_LENGTH = 10;
private static final String STORE_SECTION = "ImportPSFDialog"; //$NON-NLS-1$
private static IDialogSettings _section;
protected abstract String getPreviousTag();
protected abstract String getListTag();
public abstract String getSuggestedDefault();
protected String getPrevious() {
IDialogSettings section = getSettingsSection();
String retval = section.get(getPreviousTag());
if (retval == null) {
retval = ""; //$NON-NLS-1$
}
return retval;
}
public String[] getHistory() {
IDialogSettings section = getSettingsSection();
String[] arr = section.getArray(getListTag());
if (arr == null) {
arr = new String[0];
}
return arr;
}
public void remember(String filename) {
Vector<String> filenames = createVector(getHistory());
if (filenames.contains(filename)) {
// The item is in the list. Remove it and add it back at the
// beginning. If it already was at the beginning this will be a
// waste of time, but it's not even measurable so I don't care.
filenames.remove(filename);
}
// Most recently used filename goes to the beginning of the list
filenames.add(0, filename);
// Forget any overflowing items
while (filenames.size() > HISTORY_LENGTH) {
filenames.remove(HISTORY_LENGTH);
}
// Make it an array
String[] arr = filenames.toArray(new String[filenames.size()]);
IDialogSettings section = getSettingsSection();
section.put(getListTag(), arr);
section.put(getPreviousTag(), filename);
}
private Vector<String> createVector(String[] arr) {
Vector<String> v = new Vector<>();
for (int ix = 0; ix < arr.length; ++ix) {
v.add(ix, arr[ix]);
}
return v;
}
private IDialogSettings getSettingsSection() {
if (_section != null)
return _section;
IDialogSettings settings = TeamUIPlugin.getPlugin().getDialogSettings();
_section = settings.getSection(STORE_SECTION);
if (_section != null)
return _section;
_section = settings.addNewSection(STORE_SECTION);
return _section;
}
}
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