--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/ITextViewerExtension5.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,137 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 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.ITextViewerExtension5;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Extension interface for {@link dwtx.jface.text.ITextViewer}. Defines
+ * a conceptual replacement of the original visible region concept. This interface
+ * replaces {@link dwtx.jface.text.ITextViewerExtension3}.
+ * <p>
+ * Introduces the explicit concept of model and widget coordinates. For example,
+ * a selection returned by the text viewer's control is a widget selection. A
+ * widget selection always maps to a certain range of the viewer's document.
+ * This range is considered the model selection.
+ * <p>
+ * All model ranges that have a corresponding widget ranges are considered
+ * "exposed model ranges". The viewer can be requested to expose a given model
+ * range. Thus, a visible region is a particular degeneration of exposed model
+ * ranges.
+ * <p>
+ * This interface allows implementers to follow a sophisticated presentation
+ * model in which the visible presentation is a complex projection of the
+ * viewer's input document.
+ *
+ * @since 3.0
+ */
+public interface ITextViewerExtension5 : ITextViewerExtension3 {
+
+    /**
+     * Returns the minimal region of the viewer's input document that completely
+     * comprises everything that is visible in the viewer's widget or
+     * <code>null</code> if there is no such region.
+     *
+     * @return the minimal region of the viewer's document comprising the
+     *         contents of the viewer's widget or <code>null</code>
+     */
+    IRegion getModelCoverage();
+
+    /**
+     * Returns the widget line that corresponds to the given line of the
+     * viewer's input document or <code>-1</code> if there is no such line.
+     *
+     * @param modelLine the line of the viewer's document
+     * @return the corresponding widget line or <code>-1</code>
+     */
+    int modelLine2WidgetLine(int modelLine);
+
+    /**
+     * Returns the widget offset that corresponds to the given offset in the
+     * viewer's input document or <code>-1</code> if there is no such offset
+     *
+     * @param modelOffset the offset in the viewer's document
+     * @return the corresponding widget offset or <code>-1</code>
+     */
+    int modelOffset2WidgetOffset(int modelOffset);
+
+    /**
+     * Returns the minimal region of the viewer's widget that completely
+     * comprises the given region of the viewer's input document or
+     * <code>null</code> if there is no such region.
+     *
+     * @param modelRange the region of the viewer's document
+     * @return the minimal region of the widget comprising
+     *         <code>modelRange</code> or <code>null</code>
+     */
+    IRegion modelRange2WidgetRange(IRegion modelRange);
+
+    /**
+     * Returns the offset of the viewer's input document that corresponds to the
+     * given widget offset or <code>-1</code> if there is no such offset
+     *
+     * @param widgetOffset the widget offset
+     * @return the corresponding offset in the viewer's document or
+     *         <code>-1</code>
+     */
+    int widgetOffset2ModelOffset(int widgetOffset);
+
+    /**
+     * Returns the minimal region of the viewer's input document that completely
+     * comprises the given widget region or <code>null</code> if there is no
+     * such region.
+     *
+     * @param widgetRange the widget region
+     * @return the minimal region of the viewer's document comprising
+     *         <code>widgetlRange</code> or <code>null</code>
+     */
+    IRegion widgetRange2ModelRange(IRegion widgetRange);
+
+    /**
+     * Returns the line of the viewer's input document that corresponds to the
+     * given widget line or <code>-1</code> if there is no such line.
+     *
+     * @param widgetLine the widget line
+     * @return the corresponding line of the viewer's document or
+     *         <code>-1</code>
+     */
+    int widgetLine2ModelLine(int widgetLine);
+
+    /**
+     * Returns the widget line of the given widget offset.
+     *
+     * @param widgetOffset the widget offset
+     * @return the widget line of the widget offset
+     */
+    int widgetLineOfWidgetOffset(int widgetOffset);
+
+
+    /**
+     * Returns the maximal subranges of the given model range thus that there is
+     * no offset inside a subrange for which there is no image offset.
+     *
+     * @param modelRange the model range
+     * @return the list of subranges
+     */
+    IRegion[] getCoveredModelRanges(IRegion modelRange);
+
+    /**
+     * Exposes the given model range. Returns whether this call caused a change
+     * of the set of exposed model ranges.
+     *
+     * @param modelRange the model range to be exposed
+     * @return <code>true</code> if the set of exposed model ranges changed,
+     *         <code>false</code> otherwise
+     */
+    bool exposeModelRange(IRegion modelRange);
+}