X-Git-Url: http://secure.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/template/contentassist/InclusivePositionUpdater.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/template/contentassist/InclusivePositionUpdater.java
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index 0000000..dcd7b5f
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+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/template/contentassist/InclusivePositionUpdater.java
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+/*******************************************************************************
+ * 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;
+	}
+
+}