| /******************************************************************************* |
| * Copyright (c) 2000, 2015 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.ui.internal.texteditor.quickdiff; |
| |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.ILineDiffInfo; |
| |
| import org.eclipse.ui.internal.texteditor.NLSUtility; |
| |
| import org.eclipse.compare.rangedifferencer.RangeDifference; |
| |
| |
| /** |
| * The local implementation of <code>ILineDiffInfo</code>. As instances are |
| * also <code>Annotation</code>s, they can be used in |
| * <code>DocumentLineDiffer</code>s <code>IAnnotationModel</code> protocol. |
| * |
| * @since 3.0 |
| */ |
| public final class DiffRegion extends Annotation implements ILineDiffInfo { |
| private final QuickDiffRangeDifference fDifference; |
| |
| private final int fOffset; |
| |
| private final List<QuickDiffRangeDifference> fList; |
| |
| private final IDocument fDocument; |
| |
| /** |
| * Creates a new diff region. |
| * |
| * @param difference the range difference |
| * @param offset the offset |
| * @param differences the list of differences |
| * @param source the document |
| */ |
| public DiffRegion(QuickDiffRangeDifference difference, int offset, List<QuickDiffRangeDifference> differences, IDocument source) { |
| super("org.eclipse.ui.workbench.texteditor.quickdiffChange", false, null); //$NON-NLS-1$ |
| fOffset= offset; |
| fDifference= difference; |
| fList= differences; |
| fDocument= source; |
| } |
| |
| @Override |
| public String getType() { |
| // we return unknown for unchanged regions to avoid |
| // them getting displayed. |
| switch (getChangeType()) { |
| case CHANGED: |
| int r= fDifference.rightLength(); |
| int l= fDifference.leftLength(); |
| int c= Math.min(r, l); |
| if (c == 0 && r - l < 0) |
| return "org.eclipse.ui.workbench.texteditor.quickdiffDeletion"; //$NON-NLS-1$ |
| else |
| return "org.eclipse.ui.workbench.texteditor.quickdiffChange"; //$NON-NLS-1$ |
| case ADDED: |
| return "org.eclipse.ui.workbench.texteditor.quickdiffAddition"; //$NON-NLS-1$ |
| case UNCHANGED: |
| return "org.eclipse.ui.workbench.texteditor.quickdiffUnchanged"; //$NON-NLS-1$ |
| default: |
| return TYPE_UNKNOWN; |
| } |
| } |
| |
| @Override |
| public int getRemovedLinesBelow() { |
| if (fOffset == fDifference.rightLength() - 1) { |
| |
| if (getChangeType() != UNCHANGED) |
| return Math.max(fDifference.leftLength() - fDifference.rightLength(), 0); |
| |
| synchronized (fList) { |
| for (ListIterator<QuickDiffRangeDifference> it= fList.listIterator(); it.hasNext();) { |
| if (fDifference.equals(it.next())) { |
| if (it.hasNext()) { |
| QuickDiffRangeDifference next= it.next(); |
| if (next.rightLength() == 0) |
| return Math.max(next.leftLength() - next.rightLength(), 0); |
| } |
| break; |
| } |
| } |
| } |
| } |
| return 0; |
| } |
| |
| @Override |
| public int getChangeType() { |
| if (fDifference.kind() == RangeDifference.NOCHANGE) |
| return UNCHANGED; |
| if (fOffset >= fDifference.leftLength()) |
| return ADDED; |
| return CHANGED; |
| } |
| |
| @Override |
| public int getRemovedLinesAbove() { |
| if (getChangeType() == UNCHANGED && fOffset == 0) { |
| synchronized (fList) { |
| for (ListIterator<QuickDiffRangeDifference> it= fList.listIterator(fList.size()); it.hasPrevious();) { |
| if (fDifference.equals(it.previous())) { |
| if (it.hasPrevious()) { |
| QuickDiffRangeDifference previous= it.previous(); |
| return Math.max(previous.leftLength() - previous.rightLength(), 0); |
| } |
| break; |
| } |
| } |
| } |
| } |
| return 0; |
| } |
| |
| @Override |
| public boolean hasChanges() { |
| return getChangeType() != UNCHANGED || getRemovedLinesAbove() > 0 || getRemovedLinesBelow() > 0; |
| } |
| |
| @Override |
| public String[] getOriginalText() { |
| IDocument doc= fDocument; |
| if (doc != null) { |
| int startLine= fDifference.leftStart() + fOffset; |
| if (startLine >= fDifference.leftEnd()) |
| return new String[0]; // original text of an added line is |
| // empty |
| |
| int endLine= startLine + getRemovedLinesBelow(); |
| if (getChangeType() == UNCHANGED) |
| startLine++; |
| String[] ret= new String[endLine - startLine + 1]; |
| for (int i= 0; i < ret.length; i++) { |
| try { |
| ret[i]= doc.get(doc.getLineOffset(startLine + i), doc.getLineLength(startLine + i)); |
| } catch (BadLocationException e) { |
| ret[i]= ""; //$NON-NLS-1$ |
| } |
| } |
| return ret; |
| } |
| |
| // in initialization phase? |
| return new String[0]; |
| } |
| |
| @Override |
| public String getText() { |
| int r= fDifference.rightLength(); |
| int l= fDifference.leftLength(); |
| int c= Math.min(r, l); |
| int a= r - l; |
| String changed= c > 0 ? NLSUtility.format(QuickDiffMessages.quickdiff_annotation_changed, new Integer(c)) : null; |
| String added; |
| if (a > 0) |
| added= NLSUtility.format(QuickDiffMessages.quickdiff_annotation_added, new Integer(a)); |
| else if (a < 0) |
| added= NLSUtility.format(QuickDiffMessages.quickdiff_annotation_deleted, new Integer(-a)); |
| else |
| added= null; |
| String line= c > 1 || c == 0 && Math.abs(a) > 1 ? QuickDiffMessages.quickdiff_annotation_line_plural : QuickDiffMessages.quickdiff_annotation_line_singular; |
| |
| String ret= (changed != null ? changed : "") + (changed != null ? " " + line : "") //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$ |
| + (changed != null && added != null ? ", " : " ") + (added != null ? added : "") //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ |
| + (added != null && changed == null ? " " + line : ""); //$NON-NLS-1$//$NON-NLS-2$ |
| return ret; |
| } |
| |
| /** |
| * @return Returns the difference. |
| */ |
| public QuickDiffRangeDifference getDifference() { |
| return fDifference; |
| } |
| |
| /** |
| * @return Returns the offset. |
| */ |
| public int getOffset() { |
| return fOffset; |
| } |
| } |