--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.text.template.contentassist;
+
+import org.eclipse.jface.text.BadPositionCategoryException;
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IPositionUpdater;
+import org.eclipse.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 implements 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 org.eclipse.jface.text.IPositionUpdater#update(org.eclipse.jface.text.DocumentEvent)
+ */
+ public void update(DocumentEvent event) {
+
+ int eventOffset= event.getOffset();
+ int eventOldLength= event.getLength();
+ int eventNewLength= event.getText() == null ? 0 : event.getText().length();
+ int deltaLength= eventNewLength - eventOldLength;
+
+ try {
+ Position[] positions= event.getDocument().getPositions(fCategory);
+
+ for (int i= 0; i != 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 ajusted acordingly
+ // 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;
+ }
+
+}