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/*******************************************************************************
* Copyright (C) 2012, Kevin Sawicki <kevin@github.com>
* and other copyright owners as documented in the project's IP log.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.egit.ui.internal.commit;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import org.eclipse.egit.ui.UIPreferences;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.WorkbenchException;
import org.eclipse.ui.XMLMemento;
/**
* Provides access to read and add new saved commit messages.
*/
public class CommitMessageHistory {
private static final String KEY_MESSAGE = "message"; //$NON-NLS-1$
private static final String KEY_MESSAGES = "messages"; //$NON-NLS-1$
/**
* @return saved commit messages
*/
public static Set<String> getCommitHistory() {
String all = getPreferenceStore().getString(
UIPreferences.COMMIT_DIALOG_HISTORY_MESSAGES);
if (all.length() == 0)
return Collections.emptySet();
int max = getCommitHistorySize();
if (max < 1)
return Collections.emptySet();
XMLMemento memento;
try {
memento = XMLMemento.createReadRoot(new StringReader(all));
} catch (WorkbenchException e) {
org.eclipse.egit.ui.Activator.logError(
"Error reading commit message history", e); //$NON-NLS-1$
return Collections.emptySet();
}
Set<String> messages = new LinkedHashSet<>();
for (IMemento child : memento.getChildren(KEY_MESSAGE)) {
messages.add(child.getTextData());
if (messages.size() == max)
break;
}
return messages;
}
/**
* Save a new commit message.
*
* @param message
*/
public static void saveCommitHistory(String message) {
if (message == null || message.length() == 0)
return;
int size = getCommitHistorySize();
if (size < 1)
return;
XMLMemento memento = XMLMemento.createWriteRoot(KEY_MESSAGES);
memento.createChild(KEY_MESSAGE).putTextData(message);
int count = 1;
if (count < size) {
Set<String> history = getCommitHistory();
history.remove(message);
for (String previous : history) {
memento.createChild(KEY_MESSAGE).putTextData(previous);
count++;
if (count == size)
break;
}
}
StringWriter writer = new StringWriter();
try {
memento.save(writer);
getPreferenceStore().setValue(
UIPreferences.COMMIT_DIALOG_HISTORY_MESSAGES,
writer.toString());
} catch (IOException e) {
org.eclipse.egit.ui.Activator.logError(
"Error writing commit message history", e); //$NON-NLS-1$
}
}
private static IPreferenceStore getPreferenceStore() {
return org.eclipse.egit.ui.Activator.getDefault().getPreferenceStore();
}
private static int getCommitHistorySize() {
return getPreferenceStore().getInt(
UIPreferences.COMMIT_DIALOG_HISTORY_SIZE);
}
}
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