--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/templates/InclusivePositionUpdater.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,107 @@
+/*******************************************************************************
+ * 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.templates.InclusivePositionUpdater;
+
+import dwt.dwthelper.utils;
+
+import dwtx.jface.text.BadPositionCategoryException;
+import dwtx.jface.text.DocumentEvent;
+import dwtx.jface.text.IPositionUpdater;
+import dwtx.jface.text.Position;
+
+/**
+ * Position updater that takes any change in [position.offset, position.offset + position.length] as
+ * belonging to the position.
+ *
+ * @since 3.0
+ */
+class InclusivePositionUpdater : IPositionUpdater {
+
+    /** The position category. */
+    private final String fCategory;
+
+    /**
+     * Creates a new updater for the given <code>category</code>.
+     *
+     * @param category the new category.
+     */
+    public InclusivePositionUpdater(String category) {
+        fCategory= category;
+    }
+
+    /*
+     * @see dwtx.jface.text.IPositionUpdater#update(dwtx.jface.text.DocumentEvent)
+     */
+    public void update(DocumentEvent event) {
+
+        int eventOffset= event.getOffset();
+        int eventOldLength= event.getLength();
+        int eventNewLength= event.getText() is null ? 0 : event.getText().length();
+        int deltaLength= eventNewLength - eventOldLength;
+
+        try {
+            Position[] positions= event.getDocument().getPositions(fCategory);
+
+            for (int i= 0; i !is positions.length; i++) {
+
+                Position position= positions[i];
+
+                if (position.isDeleted())
+                    continue;
+
+                int offset= position.getOffset();
+                int length= position.getLength();
+                int end= offset + length;
+
+                if (offset > eventOffset + eventOldLength)
+                    // position comes way
+                    // after change - shift
+                    position.setOffset(offset + deltaLength);
+                else if (end < eventOffset) {
+                    // position comes way before change -
+                    // leave alone
+                } else if (offset <= eventOffset && end >= eventOffset + eventOldLength) {
+                    // event completely internal to the position - adjust length
+                    position.setLength(length + deltaLength);
+                } else if (offset < eventOffset) {
+                    // event extends over end of position - adjust length
+                    int newEnd= eventOffset + eventNewLength;
+                    position.setLength(newEnd - offset);
+                } else if (end > eventOffset + eventOldLength) {
+                    // event extends from before position into it - adjust offset
+                    // and length
+                    // offset becomes end of event, length adjusted accordingly
+                    // we want to recycle the overlapping part
+                    position.setOffset(eventOffset);
+                    int deleted= eventOffset + eventOldLength - offset;
+                    position.setLength(length - deleted + eventNewLength);
+                } else {
+                    // event consumes the position - delete it
+                    position.delete();
+                }
+            }
+        } catch (BadPositionCategoryException e) {
+            // ignore and return
+        }
+    }
+
+    /**
+     * Returns the position category.
+     *
+     * @return the position category
+     */
+    public String getCategory() {
+        return fCategory;
+    }
+
+}