tikhomirov@629: /*
tikhomirov@629:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@629:  *  
tikhomirov@629:  * This program is free software; you can redistribute it and/or modify
tikhomirov@629:  * it under the terms of the GNU General Public License as published by
tikhomirov@629:  * the Free Software Foundation; version 2 of the License.
tikhomirov@629:  *
tikhomirov@629:  * This program is distributed in the hope that it will be useful,
tikhomirov@629:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@629:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@629:  * GNU General Public License for more details.
tikhomirov@629:  *
tikhomirov@629:  * For information on how to redistribute this software under
tikhomirov@629:  * the terms of a license other than GNU General Public License
tikhomirov@629:  * contact TMate Software at support@hg4j.com
tikhomirov@629:  */
tikhomirov@629: package org.tmatesoft.hg.core;
tikhomirov@629: 
tikhomirov@629: import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
tikhomirov@629: import static org.tmatesoft.hg.repo.HgRepository.TIP;
tikhomirov@629: 
tikhomirov@629: import org.tmatesoft.hg.internal.BlameHelper;
tikhomirov@630: import org.tmatesoft.hg.internal.CsetParamKeeper;
tikhomirov@629: import org.tmatesoft.hg.internal.FileHistory;
tikhomirov@629: import org.tmatesoft.hg.internal.FileRevisionHistoryChunk;
tikhomirov@629: import org.tmatesoft.hg.repo.HgDataFile;
tikhomirov@629: import org.tmatesoft.hg.repo.HgRepository;
tikhomirov@629: import org.tmatesoft.hg.repo.HgRuntimeException;
tikhomirov@632: import org.tmatesoft.hg.util.CancelSupport;
tikhomirov@629: import org.tmatesoft.hg.util.CancelledException;
tikhomirov@629: import org.tmatesoft.hg.util.Path;
tikhomirov@632: import org.tmatesoft.hg.util.ProgressSupport;
tikhomirov@629: 
tikhomirov@629: /**
tikhomirov@632:  * 'hg diff' counterpart, with similar, although not identical, functionality.
tikhomirov@632:  * Despite both 'hg diff' and this command are diff-based, implementation
tikhomirov@632:  * peculiarities may lead to slightly different diff results. Either is valid
tikhomirov@632:  * as there's no strict diff specification. 
tikhomirov@632:  * 
tikhomirov@632:  * <p>
tikhomirov@632:  * <strong>Note</strong>, at the moment this command annotates single file only. Diff over
tikhomirov@632:  * complete repository (all the file changed in a given changeset) might
tikhomirov@632:  * be added later.
tikhomirov@629:  * 
tikhomirov@629:  * @since 1.1
tikhomirov@629:  * @author Artem Tikhomirov
tikhomirov@629:  * @author TMate Software Ltd.
tikhomirov@629:  */
tikhomirov@629: public class HgDiffCommand extends HgAbstractCommand<HgDiffCommand> {
tikhomirov@629: 
tikhomirov@629: 	private final HgRepository repo;
tikhomirov@629: 	private HgDataFile df;
tikhomirov@630: 	private final CsetParamKeeper clogRevIndexStart, clogRevIndexEnd;
tikhomirov@629: 	private HgIterateDirection iterateDirection = HgIterateDirection.NewToOld;
tikhomirov@629: 
tikhomirov@629: 	public HgDiffCommand(HgRepository hgRepo) {
tikhomirov@629: 		repo = hgRepo;
tikhomirov@630: 		clogRevIndexStart = new CsetParamKeeper(hgRepo);
tikhomirov@630: 		clogRevIndexEnd = new CsetParamKeeper(hgRepo);
tikhomirov@629: 	}
tikhomirov@629: 	
tikhomirov@629: 	public HgDiffCommand file(Path file) {
tikhomirov@629: 		df = repo.getFileNode(file);
tikhomirov@629: 		return this;
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@630: 	/**
tikhomirov@630: 	 * Selects the file which history to blame, mandatory.
tikhomirov@630: 	 * 
tikhomirov@630: 	 * @param file repository file
tikhomirov@630: 	 * @return <code>this</code> for convenience
tikhomirov@630: 	 */
tikhomirov@629: 	public HgDiffCommand file(HgDataFile file) {
tikhomirov@629: 		df = file;
tikhomirov@629: 		return this;
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@630: 	/**
tikhomirov@630: 	 * Select range of file's history for {@link #executeDiff(HgBlameInspector)}
tikhomirov@630: 	 * and {@link #executeAnnotate(HgBlameInspector)}.
tikhomirov@630: 	 * <p>
tikhomirov@630: 	 * {@link #executeDiff(HgBlameInspector) diff} uses these as revisions to diff against each other, while 
tikhomirov@630: 	 * {@link #executeAnnotate(HgBlameInspector) annotate} walks the range. 
tikhomirov@630: 	 * 
tikhomirov@630: 	 * @param changelogRevIndexStart index of changelog revision, left range boundary
tikhomirov@630: 	 * @param changelogRevIndexEnd index of changelog revision, right range boundary
tikhomirov@630: 	 * @return <code>this</code> for convenience
tikhomirov@630: 	 * @throws HgBadArgumentException if failed to find any of supplied changeset 
tikhomirov@630: 	 */
tikhomirov@630: 	public HgDiffCommand range(int changelogRevIndexStart, int changelogRevIndexEnd) throws HgBadArgumentException {
tikhomirov@630: 		clogRevIndexStart.set(changelogRevIndexStart);
tikhomirov@630: 		clogRevIndexEnd.set(changelogRevIndexEnd);
tikhomirov@629: 		return this;
tikhomirov@629: 	}
tikhomirov@629: 	
tikhomirov@630: 	/**
tikhomirov@632: 	 * Selects revision for {@link #executeParentsAnnotate(HgBlameInspector)}, the one 
tikhomirov@630: 	 * to diff against its parents. 
tikhomirov@630: 	 * 
tikhomirov@630: 	 * Besides, it is handy when range of interest spans up to the very beginning of the file history 
tikhomirov@630: 	 * (and thus is equivalent to <code>range(0, changelogRevIndex)</code>)
tikhomirov@630: 	 * 
tikhomirov@630: 	 * @param changelogRevIndex index of changelog revision
tikhomirov@630: 	 * @return <code>this</code> for convenience
tikhomirov@630: 	 * @throws HgBadArgumentException if failed to find supplied changeset 
tikhomirov@630: 	 */
tikhomirov@630: 	public HgDiffCommand changeset(int changelogRevIndex) throws HgBadArgumentException {
tikhomirov@630: 		clogRevIndexStart.set(0);
tikhomirov@630: 		clogRevIndexEnd.set(changelogRevIndex);
tikhomirov@629: 		return this;
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@630: 	/**
tikhomirov@630: 	 * Revision differences are reported in selected order when 
tikhomirov@630: 	 * annotating {@link #range(int, int) range} of changesets with
tikhomirov@630: 	 * {@link #executeAnnotate(HgBlameInspector)}.
tikhomirov@630: 	 * <p>
tikhomirov@632: 	 * This method doesn't affect {@link #executeParentsAnnotate(HgBlameInspector)} and
tikhomirov@630: 	 * {@link #executeDiff(HgBlameInspector)}
tikhomirov@630: 	 * 
tikhomirov@630: 	 * @param order desired iteration order 
tikhomirov@630: 	 * @return <code>this</code> for convenience
tikhomirov@630: 	 */
tikhomirov@629: 	public HgDiffCommand order(HgIterateDirection order) {
tikhomirov@629: 		iterateDirection = order;
tikhomirov@629: 		return this;
tikhomirov@629: 	}
tikhomirov@629: 	
tikhomirov@629: 	/**
tikhomirov@630: 	 * Diff two revisions selected with {@link #range(int, int)} against each other.
tikhomirov@630: 	 * <p>mimics 'hg diff -r clogRevIndex1 -r clogRevIndex2'
tikhomirov@630: 	 * 
tikhomirov@630:  	 * @throws HgCallbackTargetException propagated exception from the handler
tikhomirov@630: 	 * @throws CancelledException if execution of the command was cancelled
tikhomirov@630: 	 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
tikhomirov@629: 	 */
tikhomirov@629: 	public void executeDiff(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
tikhomirov@630: 		checkFile();
tikhomirov@632: 		final ProgressSupport progress = getProgressSupport(insp);
tikhomirov@632: 		progress.start(2);
tikhomirov@629: 		try {
tikhomirov@675: 			final int startRevIndex = clogRevIndexStart.get(0);
tikhomirov@675: 			final int endRevIndex = clogRevIndexEnd.get(TIP);
tikhomirov@632: 			final CancelSupport cancel = getCancelSupport(insp, true);
tikhomirov@675: 			int fileRevIndex1 = fileRevIndex(df, startRevIndex);
tikhomirov@675: 			int fileRevIndex2 = fileRevIndex(df, endRevIndex);
tikhomirov@629: 			BlameHelper bh = new BlameHelper(insp);
tikhomirov@675: 			bh.prepare(df, startRevIndex, endRevIndex);
tikhomirov@632: 			progress.worked(1);
tikhomirov@632: 			cancel.checkCancelled();
tikhomirov@675: 			bh.diff(fileRevIndex1, startRevIndex, fileRevIndex2, endRevIndex);
tikhomirov@632: 			progress.worked(1);
tikhomirov@632: 			cancel.checkCancelled();
tikhomirov@629: 		} catch (HgRuntimeException ex) {
tikhomirov@629: 			throw new HgLibraryFailureException(ex);
tikhomirov@632: 		} finally {
tikhomirov@632: 			progress.done();
tikhomirov@629: 		}
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@629: 	/**
tikhomirov@630: 	 * Walk file history {@link #range(int, int) range} and report changes (diff) for each revision
tikhomirov@630: 	 * 
tikhomirov@630:  	 * @throws HgCallbackTargetException propagated exception from the handler
tikhomirov@630: 	 * @throws CancelledException if execution of the command was cancelled
tikhomirov@630: 	 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
tikhomirov@629: 	 */
tikhomirov@629: 	public void executeAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
tikhomirov@630: 		checkFile();
tikhomirov@632: 		ProgressSupport progress = null;
tikhomirov@629: 		try {
tikhomirov@629: 			if (!df.exists()) {
tikhomirov@629: 				return;
tikhomirov@629: 			}
tikhomirov@632: 			final CancelSupport cancel = getCancelSupport(insp, true);
tikhomirov@629: 			BlameHelper bh = new BlameHelper(insp);
tikhomirov@675: 			final int startRevIndex = clogRevIndexStart.get(0);
tikhomirov@675: 			final int endRevIndex = clogRevIndexEnd.get(TIP);
tikhomirov@675: 			FileHistory fileHistory = bh.prepare(df, startRevIndex, endRevIndex);
tikhomirov@632: 			//
tikhomirov@632: 			cancel.checkCancelled();
tikhomirov@632: 			int totalWork = 0;
tikhomirov@632: 			for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
tikhomirov@632: 				totalWork += fhc.revisionCount();
tikhomirov@632: 			}
tikhomirov@632: 			progress = getProgressSupport(insp);
tikhomirov@632: 			progress.start(totalWork + 1);
tikhomirov@632: 			progress.worked(1); // BlameHelper.prepare
tikhomirov@632: 			//
tikhomirov@629: 			int[] fileClogParentRevs = new int[2];
tikhomirov@629: 			int[] fileParentRevs = new int[2];
tikhomirov@629: 			for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
tikhomirov@629: 				for (int fri : fhc.fileRevisions(iterateDirection)) {
tikhomirov@629: 					int clogRevIndex = fhc.changeset(fri);
tikhomirov@629: 					// the way we built fileHistory ensures we won't walk past [changelogRevIndexStart..changelogRevIndexEnd]
tikhomirov@675: 					assert clogRevIndex >= startRevIndex;
tikhomirov@675: 					assert clogRevIndex <= endRevIndex;
tikhomirov@629: 					fhc.fillFileParents(fri, fileParentRevs);
tikhomirov@629: 					fhc.fillCsetParents(fri, fileClogParentRevs);
tikhomirov@629: 					bh.annotateChange(fri, clogRevIndex, fileParentRevs, fileClogParentRevs);
tikhomirov@632: 					progress.worked(1);
tikhomirov@632: 					cancel.checkCancelled();
tikhomirov@629: 				}
tikhomirov@629: 			}
tikhomirov@629: 		} catch (HgRuntimeException ex) {
tikhomirov@629: 			throw new HgLibraryFailureException(ex);
tikhomirov@632: 		} finally {
tikhomirov@632: 			if (progress != null) {
tikhomirov@632: 				progress.done();
tikhomirov@632: 			}
tikhomirov@629: 		}
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@629: 	/**
tikhomirov@629: 	 * Annotates changes of the file against its parent(s). 
tikhomirov@629: 	 * Unlike {@link #annotate(HgDataFile, int, Inspector, HgIterateDirection)}, doesn't
tikhomirov@629: 	 * walk file history, looks at the specified revision only. Handles both parents (if merge revision).
tikhomirov@630: 	 * 
tikhomirov@630:  	 * @throws HgCallbackTargetException propagated exception from the handler
tikhomirov@630: 	 * @throws CancelledException if execution of the command was cancelled
tikhomirov@630: 	 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
tikhomirov@629: 	 */
tikhomirov@632: 	public void executeParentsAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
tikhomirov@630: 		checkFile();
tikhomirov@632: 		final ProgressSupport progress = getProgressSupport(insp);
tikhomirov@632: 		progress.start(2);
tikhomirov@629: 		try {
tikhomirov@632: 			final CancelSupport cancel = getCancelSupport(insp, true);
tikhomirov@630: 			int changelogRevisionIndex = clogRevIndexEnd.get();
tikhomirov@629: 			// TODO detect if file is text/binary (e.g. looking for chars < ' ' and not \t\r\n\f
tikhomirov@629: 			int fileRevIndex = fileRevIndex(df, changelogRevisionIndex);
tikhomirov@629: 			int[] fileRevParents = new int[2];
tikhomirov@629: 			df.parents(fileRevIndex, fileRevParents, null, null);
tikhomirov@629: 			if (changelogRevisionIndex == TIP) {
tikhomirov@629: 				changelogRevisionIndex = df.getChangesetRevisionIndex(fileRevIndex);
tikhomirov@629: 			}
tikhomirov@629: 			int[] fileClogParentRevs = new int[2];
tikhomirov@629: 			fileClogParentRevs[0] = fileRevParents[0] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[0]);
tikhomirov@629: 			fileClogParentRevs[1] = fileRevParents[1] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[1]);
tikhomirov@629: 			BlameHelper bh = new BlameHelper(insp);
tikhomirov@629: 			int clogIndexStart = fileClogParentRevs[0] == NO_REVISION ? (fileClogParentRevs[1] == NO_REVISION ? 0 : fileClogParentRevs[1]) : fileClogParentRevs[0];
tikhomirov@629: 			bh.prepare(df, clogIndexStart, changelogRevisionIndex);
tikhomirov@632: 			progress.worked(1);
tikhomirov@632: 			cancel.checkCancelled();
tikhomirov@629: 			bh.annotateChange(fileRevIndex, changelogRevisionIndex, fileRevParents, fileClogParentRevs);
tikhomirov@632: 			progress.worked(1);
tikhomirov@632: 			cancel.checkCancelled();
tikhomirov@629: 		} catch (HgRuntimeException ex) {
tikhomirov@629: 			throw new HgLibraryFailureException(ex);
tikhomirov@632: 		} finally {
tikhomirov@632: 			progress.done();
tikhomirov@629: 		}
tikhomirov@629: 	}
tikhomirov@629: 
tikhomirov@630: 	private void checkFile() {
tikhomirov@630: 		if (df == null) {
tikhomirov@630: 			throw new IllegalArgumentException("File is not set");
tikhomirov@630: 		}
tikhomirov@630: 	}
tikhomirov@629: 
tikhomirov@629: 	private static int fileRevIndex(HgDataFile df, int csetRevIndex) throws HgRuntimeException {
tikhomirov@629: 		Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetRevIndex, df.getPath());
tikhomirov@629: 		return df.getRevisionIndex(fileRev);
tikhomirov@629: 	}
tikhomirov@629: }