tikhomirov@596: /*
tikhomirov@596:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@596:  *  
tikhomirov@596:  * This program is free software; you can redistribute it and/or modify
tikhomirov@596:  * it under the terms of the GNU General Public License as published by
tikhomirov@596:  * the Free Software Foundation; version 2 of the License.
tikhomirov@596:  *
tikhomirov@596:  * This program is distributed in the hope that it will be useful,
tikhomirov@596:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@596:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@596:  * GNU General Public License for more details.
tikhomirov@596:  *
tikhomirov@596:  * For information on how to redistribute this software under
tikhomirov@596:  * the terms of a license other than GNU General Public License
tikhomirov@596:  * contact TMate Software at support@hg4j.com
tikhomirov@596:  */
tikhomirov@596: package org.tmatesoft.hg.internal;
tikhomirov@596: 
tikhomirov@596: import static org.tmatesoft.hg.core.HgIterateDirection.NewToOld;
tikhomirov@691: import static org.tmatesoft.hg.core.HgIterateDirection.OldToNew;
tikhomirov@596: 
tikhomirov@596: import java.util.Collections;
tikhomirov@596: import java.util.LinkedList;
tikhomirov@596: 
tikhomirov@596: import org.tmatesoft.hg.core.HgIterateDirection;
tikhomirov@596: import org.tmatesoft.hg.core.Nodeid;
tikhomirov@691: import org.tmatesoft.hg.internal.FileRenameHistory.Chunk;
tikhomirov@596: import org.tmatesoft.hg.repo.HgDataFile;
tikhomirov@628: import org.tmatesoft.hg.repo.HgRuntimeException;
tikhomirov@596: 
tikhomirov@596: /**
tikhomirov@596:  * History of a file, with copy/renames, and corresponding revision information.
tikhomirov@596:  * Facility for file history iteration. 
tikhomirov@596:  * 
tikhomirov@624:  * TODO [post-1.1] Utilize in HgLogCommand and anywhere else we need to follow file history
tikhomirov@596:  * 
tikhomirov@596:  * @author Artem Tikhomirov
tikhomirov@596:  * @author TMate Software Ltd.
tikhomirov@596:  */
tikhomirov@596: public class FileHistory {
tikhomirov@596: 	
tikhomirov@596: 	private LinkedList<FileRevisionHistoryChunk> fileCompleteHistory = new LinkedList<FileRevisionHistoryChunk>();
tikhomirov@596: 	private final HgDataFile df;
tikhomirov@596: 	private final int csetTo;
tikhomirov@596: 	private final int csetFrom;
tikhomirov@596: 	
tikhomirov@596: 	public FileHistory(HgDataFile file, int fromChangeset, int toChangeset) {
tikhomirov@596: 		df = file;
tikhomirov@596: 		csetFrom = fromChangeset;
tikhomirov@596: 		csetTo = toChangeset;
tikhomirov@596: 	}
tikhomirov@596: 	
tikhomirov@596: 	public int getStartChangeset() {
tikhomirov@596: 		return csetFrom;
tikhomirov@596: 	}
tikhomirov@596: 	
tikhomirov@596: 	public int getEndChangeset() {
tikhomirov@596: 		return csetTo;
tikhomirov@596: 	}
tikhomirov@596: 
tikhomirov@628: 	public void build() throws HgRuntimeException {
tikhomirov@596: 		fileCompleteHistory.clear(); // just in case, #build() is not expected to be called more than once
tikhomirov@691: 		Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetTo, df.getPath());
tikhomirov@691: 		int fileRevIndex = df.getRevisionIndex(fileRev);
tikhomirov@691: 		FileRenameHistory frh = new FileRenameHistory(csetFrom, csetTo);
tikhomirov@691: 		if (frh.isOutOfRange(df, fileRevIndex)) {
tikhomirov@691: 			return;
tikhomirov@691: 		}
tikhomirov@691: 		frh.build(df, fileRevIndex);
tikhomirov@691: 		FileRevisionHistoryChunk prevChunk = null;
tikhomirov@691: 		for (Chunk c : frh.iterate(OldToNew)) {
tikhomirov@691: 			FileRevisionHistoryChunk fileHistory = new FileRevisionHistoryChunk(c.file(), c.firstCset(), c.lastCset(), c.firstFileRev(), c.lastFileRev());
tikhomirov@691: 			fileHistory.init();
tikhomirov@691: 			if (fileHistory.revisionCount() == 0) {
tikhomirov@691: 				// no revisions on our cset range of interest
tikhomirov@691: 				continue;
tikhomirov@596: 			}
tikhomirov@691: 			if (prevChunk != null) {
tikhomirov@691: 				prevChunk.linkTo(fileHistory);
tikhomirov@691: 			}
tikhomirov@691: 			fileCompleteHistory.addLast(fileHistory); // to get the list in old-to-new order
tikhomirov@691: 			prevChunk = fileHistory;
tikhomirov@691: 		}
tikhomirov@596: 		// fileCompleteHistory is in (origin, intermediate target, ultimate target) order
tikhomirov@596: 	}
tikhomirov@596: 	
tikhomirov@596: 	public Iterable<FileRevisionHistoryChunk> iterate(HgIterateDirection order) {
tikhomirov@596: 		if (order == NewToOld) {
tikhomirov@596: 			return ReverseIterator.reversed(fileCompleteHistory);
tikhomirov@596: 		}
tikhomirov@596: 		return Collections.unmodifiableList(fileCompleteHistory);
tikhomirov@596: 	}
tikhomirov@596: }