--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/revisions/Revision.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,165 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.text.revisions.Revision;
+
+import dwt.dwthelper.utils;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Date;
+import java.util.Iterator;
+import java.util.List;
+
+import dwt.graphics.RGB;
+import dwtx.jface.internal.text.revisions.ChangeRegion;
+import dwtx.jface.internal.text.revisions.Hunk;
+import dwtx.jface.text.IInformationControlCreator;
+import dwtx.jface.text.source.ILineRange;
+
+/**
+ * Describes a revision of a document. A revision consists of one ore more {@link ILineRange}s.
+ * <p>
+ * Clients may subclass.
+ * </p>
+ * 
+ * @since 3.2
+ */
+public abstract class Revision {
+    /** The original list of change regions, element type: {@link ChangeRegion}. */
+    private final List fChangeRegions= new ArrayList();
+    /**
+     * The cached list of adjusted ranges, element type: {@link RevisionRange}. <code>null</code>
+     * if the list must be re-computed. Unmodifiable.
+     * 
+     * @since 3.3
+     */
+    private List fRanges= null;
+
+    /**
+     * Creates a new revision.
+     */
+    protected Revision() {
+    }
+
+    /**
+     * Adds a line range to this revision. The range must be non-empty and have a legal start line
+     * (not -1).
+     * 
+     * @param range a line range that was changed with this revision
+     * @throws IndexOutOfBoundsException if the line range is empty or has a negative start line
+     */
+    public final void addRange(ILineRange range) throws IndexOutOfBoundsException {
+        fChangeRegions.add(new ChangeRegion(this, range));
+    }
+
+    /**
+     * Returns the contained {@link RevisionRange}s adapted to the current diff state. The returned
+     * information is only valid at the moment it is returned, and may change as the annotated
+     * document is modified.
+     * 
+     * @return an unmodifiable view of the contained ranges (element type: {@link RevisionRange})
+     */
+    public final List getRegions() {
+        if (fRanges is null) {
+            List ranges= new ArrayList(fChangeRegions.size());
+            for (Iterator it= fChangeRegions.iterator(); it.hasNext();) {
+                ChangeRegion region= (ChangeRegion) it.next();
+                for (Iterator inner= region.getAdjustedRanges().iterator(); inner.hasNext();) {
+                    ILineRange range= (ILineRange) inner.next();
+                    ranges.add(new RevisionRange(this, range));
+                }
+            }
+            fRanges= Collections.unmodifiableList(ranges);
+        }
+        return fRanges;
+    }
+
+    /**
+     * Adjusts the revision information to the given diff information. Any previous diff information
+     * is discarded.
+     * 
+     * @param hunks the diff hunks to adjust the revision information to
+     * @since 3.3
+     */
+    final void applyDiff(Hunk[] hunks) {
+        fRanges= null; // mark for recomputation
+        for (Iterator regions= fChangeRegions.iterator(); regions.hasNext();) {
+            ChangeRegion region= (ChangeRegion) regions.next();
+            region.clearDiff();
+            for (int i= 0; i < hunks.length; i++) {
+                Hunk hunk= hunks[i];
+                region.adjustTo(hunk);
+            }
+        }
+    }
+
+    /**
+     * Returns the hover information that will be shown when the user hovers over the a change
+     * region of this revision.
+     * <p>
+     * <strong>Note:</strong> The hover information control which is used to display the information
+     * must be able process the given object. If the default information control creator is used
+     * the supported format is simple text, full HTML or an HTML fragment.
+     * </p>
+     * 
+     * @return the hover information for this revision or <code>null</code> for no hover
+     * @see RevisionInformation#setHoverControlCreator(IInformationControlCreator)
+     */
+    public abstract Object getHoverInfo();
+
+    /**
+     * Returns the author color for this revision. This color can be used to visually distinguish
+     * one revision from another, for example as background color.
+     * <p>
+     * Revisions from the same author must return the same color and revisions from different authors
+     * must return distinct colors.</p>
+     * 
+     * @return the RGB color for this revision's author
+     */
+    public abstract RGB getColor();
+
+    /**
+     * Returns the unique (within the document) id of this revision. This may be the version string
+     * or a different identifier.
+     * 
+     * @return the id of this revision
+     */
+    public abstract String getId();
+
+    /**
+     * Returns the modification date of this revision.
+     * 
+     * @return the modification date of this revision
+     */
+    public abstract Date getDate();
+
+    /*
+     * @see java.lang.Object#toString()
+     */
+    public String toString() {
+        return "Revision " + getId(); //$NON-NLS-1$
+    }
+
+    /**
+     * Returns the display string for the author of this revision.
+     * <p>
+     * Subclasses should replace - the default implementation returns the empty string.
+     * </p>
+     * 
+     * @return the author name
+     * @since 3.3
+     */
+    public String getAuthor() {
+        return ""; //$NON-NLS-1$
+    }
+}