1 files changed, 148 insertions, 0 deletions
diff --git a/rpm/org.eclipse.linuxtools.rpm.ui.editor/src/org/eclipse/linuxtools/rpm/ui/editor/NonRuleBasedDamagerRepairer.java b/rpm/org.eclipse.linuxtools.rpm.ui.editor/src/org/eclipse/linuxtools/rpm/ui/editor/NonRuleBasedDamagerRepairer.java
new file mode 100644
index 0000000000..fae9e80ed6
--- /dev/null
+++ b/rpm/org.eclipse.linuxtools.rpm.ui.editor/src/org/eclipse/linuxtools/rpm/ui/editor/NonRuleBasedDamagerRepairer.java
@@ -0,0 +1,148 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2009 Red Hat, Inc.
+ * 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:
+ *    Red Hat - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.linuxtools.rpm.ui.editor;
+
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITypedRegion;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.TextAttribute;
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.jface.text.presentation.IPresentationDamager;
+import org.eclipse.jface.text.presentation.IPresentationRepairer;
+import org.eclipse.swt.custom.StyleRange;
+
+public class NonRuleBasedDamagerRepairer
+	implements IPresentationDamager, IPresentationRepairer {
+
+	/** The document this object works on */
+	protected IDocument fDocument;
+	/** The default text attribute if non is returned as data by the current token */
+	protected TextAttribute fDefaultTextAttribute;
+	
+	/**
+	 * Constructor for NonRuleBasedDamagerRepairer.
+	 */
+	public NonRuleBasedDamagerRepairer(TextAttribute defaultTextAttribute) {
+		Assert.isNotNull(defaultTextAttribute);
+
+		fDefaultTextAttribute = defaultTextAttribute;
+	}
+
+	/**
+	 * @see IPresentationRepairer#setDocument(IDocument)
+	 */
+	public void setDocument(IDocument document) {
+		fDocument = document;
+	}
+
+	/**
+	 * Returns the end offset of the line that contains the specified offset or
+	 * if the offset is inside a line delimiter, the end offset of the next line.
+	 *
+	 * @param offset the offset whose line end offset must be computed
+	 * @return the line end offset for the given offset
+	 * @exception BadLocationException if offset is invalid in the current document
+	 */
+	protected int endOfLineOf(int offset) throws BadLocationException {
+
+		IRegion info = fDocument.getLineInformationOfOffset(offset);
+		if (offset <= info.getOffset() + info.getLength())
+			return info.getOffset() + info.getLength();
+
+		int line = fDocument.getLineOfOffset(offset);
+		try {
+			info = fDocument.getLineInformation(line + 1);
+			return info.getOffset() + info.getLength();
+		} catch (BadLocationException x) {
+			return fDocument.getLength();
+		}
+	}
+
+	/**
+	 * @see IPresentationDamager#getDamageRegion(ITypedRegion, DocumentEvent, boolean)
+	 */
+	public IRegion getDamageRegion(
+		ITypedRegion partition,
+		DocumentEvent event,
+		boolean documentPartitioningChanged) {
+		if (!documentPartitioningChanged) {
+			try {
+
+				IRegion info =
+					fDocument.getLineInformationOfOffset(event.getOffset());
+				int start = Math.max(partition.getOffset(), info.getOffset());
+
+				int end =
+					event.getOffset()
+						+ (event.getText() == null
+							? event.getLength()
+							: event.getText().length());
+
+				if (info.getOffset() <= end
+					&& end <= info.getOffset() + info.getLength()) {
+					// optimize the case of the same line
+					end = info.getOffset() + info.getLength();
+				} else
+					end = endOfLineOf(end);
+
+				end =
+					Math.min(
+						partition.getOffset() + partition.getLength(),
+						end);
+				return new Region(start, end - start);
+
+			} catch (BadLocationException x) {
+			}
+		}
+
+		return partition;
+	}
+
+	/**
+	 * @see IPresentationRepairer#createPresentation(TextPresentation, ITypedRegion)
+	 */
+	public void createPresentation(
+		TextPresentation presentation,
+		ITypedRegion region) {
+		addRange(
+			presentation,
+			region.getOffset(),
+			region.getLength(),
+			fDefaultTextAttribute);
+	}
+
+	/**
+	 * Adds style information to the given text presentation.
+	 *
+	 * @param presentation the text presentation to be extended
+	 * @param offset the offset of the range to be styled
+	 * @param length the length of the range to be styled
+	 * @param attr the attribute describing the style of the range to be styled
+	 */
+	protected void addRange(
+		TextPresentation presentation,
+		int offset,
+		int length,
+		TextAttribute attr) {
+		if (attr != null)
+			presentation.addStyleRange(
+				new StyleRange(
+					offset,
+					length,
+					attr.getForeground(),
+					attr.getBackground(),
+					attr.getStyle()));
+	}
+}
+\ No newline at end of file