Merge remote-tracking branch 'origin/GP-2-dragonmacher-rt-v6+--SQUASHED'

Ghidra/Features/FunctionGraph/src/test.slow/java/ghidra/app/plugin/core/functiongraph/AbstractFunctionGraphTest.java

@@ -401,7 +401,6 @@ public abstract class AbstractFunctionGraphTest extends AbstractGhidraHeadedInte
 	@After
 	public void tearDown() throws Exception {
 		waitForSwing();
-		env.closeTool(tool);
 		env.dispose();
 	}
 

Ghidra/Framework/Docking/src/main/java/docking/GlobalMenuAndToolBarManager.java

@@ -216,7 +216,10 @@ public class GlobalMenuAndToolBarManager implements DockingWindowListener {
 			// has not yet completed
 			DialogComponentProvider provider = dialog.getDialogComponent();
 			if (provider != null) {
-				return provider.getActionContext(null);
+				ActionContext context = provider.getActionContext(null);
+				if (context != null) {
+					return context;
+				}
 			}
 		}
 
@@ -225,7 +228,7 @@ public class GlobalMenuAndToolBarManager implements DockingWindowListener {
 
 	private ActionContext getComponentProviderContext(WindowNode windowNode) {
 		if (windowNode == null) {
-			return null;
+			return new DefaultActionContext();
 		}
 
 		ActionContext context = null;

Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/support/Highlight.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -17,6 +17,8 @@ package docking.widgets.fieldpanel.support;
 
 import java.awt.Color;
 
+import generic.json.Json;
+
 public class Highlight {
 	private int start;
 	private int end;
@@ -36,21 +38,28 @@ public class Highlight {
 	}
 
 	/**
-	 * Returns the starting position of the highlight.
+	 * {@return the starting position of the highlight}
 	 */
 	public int getStart() {
 		return start + offset;
 	}
 
 	/**
-	 * Returns the ending position (inclusive) of the highlight.
+	 * {@return the ending position (inclusive) of the highlight}
 	 */
 	public int getEnd() {
 		return end + offset;
 	}
 
 	/**
-	 * Returns the color to use as the background highlight color.
+	 * {@return the number of characters in the match.}
+	 */
+	public int length() {
+		return (end - start) + 1; // +1 because 'end' is inclusive
+	}
+
+	/**
+	 * {@return the color to use as the background highlight color.}
 	 */
 	public Color getColor() {
 		return color;
@@ -59,11 +68,20 @@ public class Highlight {
 	/**
 	 * Sets the offset of this highlights start and end values.  The effect of the offset is that
 	 * calls to {@link #getStart()} and {@link #getEnd()} will return their values with the 
-	 * offset added.
+	 * offset added.  
+	 * <p>
+	 * This useful when highlights are using offsets for widgets that embedded inside of composite
+	 * containers.  the parent container turn these relative values into absolute values that work
+	 * when all sub-parts are combined.
 	 * 
 	 * @param newOffset The new offset into this highlight.
 	 */
 	public void setOffset(int newOffset) {
 		offset = newOffset;
 	}
+
+	@Override
+	public String toString() {
+		return Json.toString(this);
+	}
 }

Ghidra/Framework/Docking/src/main/java/docking/widgets/search/TextComponentSearchResults.java

@@ -16,6 +16,7 @@
 package docking.widgets.search;
 
 import java.awt.*;
+import java.awt.geom.Rectangle2D;
 import java.net.URL;
 import java.util.*;
 import java.util.List;
@@ -307,7 +308,11 @@ public class TextComponentSearchResults extends SearchResults {
 		try {
 			int start = location.getStartIndexInclusive();
 			int end = location.getEndIndexInclusive();
-			Rectangle startR = editorPane.modelToView2D(start).getBounds();
+			Rectangle2D start2d = editorPane.modelToView2D(start);
+			if (start2d == null) {
+				return; // not yet realized
+			}
+			Rectangle startR = start2d.getBounds();
 			Rectangle endR = editorPane.modelToView2D(end).getBounds();
 			endR.width += 20; // a little extra space so the view is not right at the text end
 			Rectangle union = startR.union(endR);
@@ -449,7 +454,7 @@ public class TextComponentSearchResults extends SearchResults {
 		}
 
 		Color c = location.isActive() ? activeHighlightColor : highlightColor;
-		HighlightPainter painter = new DefaultHighlightPainter(c);
+		HighlightPainter painter = new SearchResultsHighlightPainter(c);
 		int start = location.getStartIndexInclusive();
 		int end = location.getEndIndexInclusive() + 1; // +1 to make inclusive be exclusive
 		try {
@@ -463,6 +468,7 @@ public class TextComponentSearchResults extends SearchResults {
 
 	@Override
 	public void dispose() {
+
 		caretUpdater.dispose();
 
 		if (editorPane != null) {
@@ -557,7 +563,11 @@ public class TextComponentSearchResults extends SearchResults {
 			}
 
 			if (nonSearchDelegate) {
+				// Calling setHighlighter() will cause all old highlights to get removed.  We would
+				// like the non-search highlights to remain.  Grab them now and put them back after.
+				Highlight[] nonSearchHighlights = delegate.getHighlights();
 				editorPane.setHighlighter(delegate);
+				restoreNonSearchHighlights(nonSearchHighlights);
 			}
 			else {
 				editorPane.setHighlighter(null);
@@ -566,7 +576,30 @@ public class TextComponentSearchResults extends SearchResults {
 
 		@Override
 		public void install(JTextComponent c) {
+			Highlight[] nonSearchHighlights = delegate.getHighlights();
 			delegate.install(c);
+
+			// Calling delegate.install() will cause its existing highlights to get removed.  We 
+			// would like to keep them, so we have save and restore them.
+			restoreNonSearchHighlights(nonSearchHighlights);
+		}
+
+		private void restoreNonSearchHighlights(Highlight[] oldHighlights) {
+			for (Highlight hl : oldHighlights) {
+				int start = hl.getStartOffset();
+				int end = hl.getEndOffset();
+				HighlightPainter painter = hl.getPainter();
+				if (painter instanceof SearchResultsHighlightPainter) {
+					continue;
+				}
+				try {
+					delegate.addHighlight(start, end, painter);
+				}
+				catch (BadLocationException e) {
+					// shouldn't happen
+					Msg.error(this, "Could not add existing highlight", e);
+				}
+			}
 		}
 
 		@Override
@@ -599,7 +632,11 @@ public class TextComponentSearchResults extends SearchResults {
 
 		@Override
 		public void removeAllHighlights() {
-			delegate.removeAllHighlights();
+			// only remove our highlights, not any pre-existing client non-search highlights
+			for (TextComponentSearchLocation loc : searchLocations) {
+				Object tag = loc.getHighlightTag();
+				removeHighlight(tag);
+			}
 		}
 
 		@Override
@@ -611,6 +648,12 @@ public class TextComponentSearchResults extends SearchResults {
 		public Highlight[] getHighlights() {
 			return delegate.getHighlights();
 		}
+	}
 
+	// marker class
+	private class SearchResultsHighlightPainter extends DefaultHighlightPainter {
+		public SearchResultsHighlightPainter(Color c) {
+			super(c);
+		}
 	}
 }

Ghidra/Framework/Docking/src/main/java/docking/widgets/search/TextComponentSearcher.java

@@ -23,6 +23,8 @@ import javax.swing.JEditorPane;
 import javax.swing.text.BadLocationException;
 import javax.swing.text.Document;
 
+import org.apache.commons.lang3.StringUtils;
+
 import docking.widgets.CursorPosition;
 import docking.widgets.SearchLocation;
 import ghidra.util.Msg;
@@ -235,6 +237,11 @@ public class TextComponentSearcher implements FindDialogSearcher {
 				return;
 			}
 
+			if (StringUtils.isBlank(fullText)) {
+				Msg.error(this, "Cannot search a blank document");
+				return;
+			}
+
 			TreeMap<Integer, Line> lineRangeMap = mapLines(fullText);
 
 			Pattern pattern = createSearchPattern(searchText, useRegex);
@@ -252,7 +259,6 @@ public class TextComponentSearcher implements FindDialogSearcher {
 						context);
 				matchesByPosition.put(start, location);
 			}
-
 		}
 
 		private TreeMap<Integer, Line> mapLines(String fullText) {

Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GDynamicColumnTableModel.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -62,10 +62,14 @@ public abstract class GDynamicColumnTableModel<ROW_TYPE, DATA_SOURCE>
 	protected ServiceProvider serviceProvider;
 
 	private TableColumnDescriptor<ROW_TYPE> columnDescriptor;
-	protected List<DynamicTableColumn<ROW_TYPE, ?, ?>> tableColumns = new ArrayList<>();
-	private List<DynamicTableColumn<ROW_TYPE, ?, ?>> defaultTableColumns = new ArrayList<>();
 	protected Map<DynamicTableColumn<ROW_TYPE, ?, ?>, Settings> columnSettings = new HashMap<>();
 
+	/** All currently visible columns */
+	protected List<DynamicTableColumn<ROW_TYPE, ?, ?>> tableColumns = new ArrayList<>();
+
+	/** The initially visible columns before user changes or state restoring */
+	private List<DynamicTableColumn<ROW_TYPE, ?, ?>> defaultTableColumns = new ArrayList<>();
+
 	private boolean ignoreSettingChanges = false;
 
 	public GDynamicColumnTableModel(ServiceProvider serviceProvider) {
@@ -298,7 +302,7 @@ public abstract class GDynamicColumnTableModel<ROW_TYPE, DATA_SOURCE>
 	protected void addTableColumns(Set<DynamicTableColumn<ROW_TYPE, ?, ?>> columns,
 			boolean isDefault) {
 		for (DynamicTableColumn<ROW_TYPE, ?, ?> column : columns) {
-			doAddTableColumn(column, getDefaultTableColumns().size(), isDefault);
+			doAddTableColumn(column, -1, isDefault);
 		}
 		fireTableStructureChanged();
 	}
@@ -327,16 +331,30 @@ public abstract class GDynamicColumnTableModel<ROW_TYPE, DATA_SOURCE>
 	private void doAddTableColumn(DynamicTableColumn<ROW_TYPE, ?, ?> column, int index,
 			boolean isDefault) {
 
-		if (index < 0 || index > tableColumns.size()) {
-			index = getDefaultTableColumns().size();
+		int adjustedIndex = index;
+		if (adjustedIndex < 0 || adjustedIndex > tableColumns.size()) {
+			adjustedIndex = tableColumns.size();
 		}
 
-		tableColumns.add(index, column);
+		tableColumns.add(adjustedIndex, column);
 		columnSettings.put(column, new SettingsImpl(this, column));
-		if (isDefault) {
-			List<DynamicTableColumn<ROW_TYPE, ?, ?>> defaultColumns = getDefaultTableColumns();
-			defaultColumns.add(index, column);
+
+		if (!isDefault) {
+			return;
 		}
+
+		// Note: this method is typically called when 'tableColumns' and 'defaultTableColumns' have 
+		// the same columns.  But, that is not a requirement.   When they have the same columns, the
+		// insertion index is correct for both lists.  If they have different columns, then the 
+		// insertion index for the default columns may or may not be what the caller intended.  In
+		// practice, it should not matter where the column is inserted into the default columns, as
+		// that is only used to query whether a column is in the list or not.  If we ever need to 
+		// have accurate positioning in the default list when both lists are not equivalent, then we
+		// will have to add a new method or change this method to allow callers to dictate where the
+		// column should go in the default list.  For now, just add the column to the end.
+		adjustedIndex = defaultTableColumns.size();
+		List<DynamicTableColumn<ROW_TYPE, ?, ?>> defaultColumns = getDefaultTableColumns();
+		defaultColumns.add(adjustedIndex, column);
 	}
 
 	/**
@@ -470,7 +488,7 @@ public abstract class GDynamicColumnTableModel<ROW_TYPE, DATA_SOURCE>
 		DATA_SOURCE dataSource = getDataSource();
 
 		@SuppressWarnings("unchecked")
-		// TODO: We are casting now, as in practice the type should never be different that
+		// Note: We are casting now, as in practice the type should never be different that
 		//       the declared type.  We want to remove entirely the 'dataSource' value and then
 		//       the templating will be simpler.
 		DynamicTableColumn<ROW_TYPE, ?, DATA_SOURCE> column =

Ghidra/Framework/Docking/src/main/java/docking/widgets/table/TableColumnModelState.java

@@ -470,29 +470,30 @@ public class TableColumnModelState implements SortListener {
 		if (preferenceKey != null) {
 			return preferenceKey;
 		}
-		TableModel tableModel = table.getModel();
 
-		int columnCount = getDefaultColumnCount();
-		StringBuffer buffer = new StringBuffer();
+		TableModel model = table.getModel();
+		int n = model.getColumnCount();
+		StringBuilder buffer = new StringBuilder();
 		buffer.append(getTableModelName());
 		buffer.append(":");
-		for (int i = 0; i < columnCount; i++) {
-			String columnName = tableModel.getColumnName(i);
-			buffer.append(columnName).append(":");
+		for (int i = 0; i < n; i++) {
+			if (isDefaultColumn(i)) {
+				String columnName = model.getColumnName(i);
+				buffer.append(columnName).append(":");
+			}
 		}
 		return buffer.toString();
 	}
 
-	private int getDefaultColumnCount() {
-
+	private boolean isDefaultColumn(int col) {
 		TableModel tableModel = table.getUnwrappedTableModel();
 		if (tableModel instanceof VariableColumnTableModel) {
 			VariableColumnTableModel variableTableModel = (VariableColumnTableModel) tableModel;
 			// VariableColumnTableModels have default columns and 'found' columns.  We only want to
 			// create a key based upon the default columns
-			return variableTableModel.getDefaultColumnCount();
+			return variableTableModel.isDefaultColumn(col);
 		}
-		return tableModel.getColumnCount();
+		return true;
 	}
 
 	private void setDefaultColumnsVisible() {

Ghidra/Framework/Docking/src/main/java/docking/widgets/table/VariableColumnTableModel.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,6 +27,7 @@ public interface VariableColumnTableModel extends TableModel {
 	 * type or is wraps another table model that is an instance of this type.  If the given 
 	 * model is not such an instance, then null is returned.
 	 * 
+	 * @param m the model 
 	 * @return the variable column model
 	 */
 	public static VariableColumnTableModel from(TableModel m) {
@@ -45,6 +46,7 @@ public interface VariableColumnTableModel extends TableModel {
 	 * Returns a value that is unique for a given table column.  This is different than getting
 	 * the display name, which may be shared by different columns.
 	 * @param column the index (in the model space) of the column for which to get the identifier
+	 * @return the identifier
 	 */
 	public String getUniqueIdentifier(int column);
 
@@ -56,7 +58,9 @@ public interface VariableColumnTableModel extends TableModel {
 	 * calling methods like {@link #getColumnName(int)}. 
 	 *  
 	 * @return Gets the count of the default columns for this model.
+	 * @deprecated no longer needed
 	 */
+	@Deprecated(forRemoval = true, since = "12.1")
 	public int getDefaultColumnCount();
 
 	/**

Ghidra/Framework/Generic/src/main/java/generic/algorithms/StringReducingLcs.java

@@ -0,0 +1,41 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package generic.algorithms;
+
+/**
+ * A reducing LCS that works on Strings.
+ */
+public class StringReducingLcs extends ReducingLcs<String, Character> {
+
+	public StringReducingLcs(String x, String y) {
+		super(x, y);
+	}
+
+	@Override
+	protected String reduce(String input, int start, int end) {
+		return input.substring(start, end);
+	}
+
+	@Override
+	protected int lengthOf(String s) {
+		return s.length();
+	}
+
+	@Override
+	protected Character valueOf(String s, int offset) {
+		return s.charAt(offset);
+	}
+}

Ghidra/Framework/Generic/src/main/java/generic/algorithms/WordDiffer.java

@@ -0,0 +1,270 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package generic.algorithms;
+
+import java.util.*;
+import java.util.Map.Entry;
+import java.util.stream.Collectors;
+
+/**
+ * Finds differences between two words (any two Strings).  The results are available via 
+ * {@link #getParts()}.
+ */
+public class WordDiffer {
+
+	private List<WordPart> parts = List.of();
+
+	/**
+	 * Diffs the text between the old and new word.  The new word is the current version of two 
+	 * Strings, the old word is the previous version.
+	 * 
+	 * @param oldWord the previous version of the text
+	 * @param newWord the current version of the text
+	 */
+	public WordDiffer(String oldWord, String newWord) {
+
+		LcsMatch lcs = getLcs(newWord, oldWord);
+		if (lcs == null) {
+			return;
+		}
+
+		TreeMap<Integer, String> wordsByOffset = buildWordOffsets(lcs);
+
+		parts = createWordParts(newWord, wordsByOffset);
+	}
+
+	/**
+	 * Returns the 'new word' broken into Strings with offsets, with each part being the same text
+	 * or different text.
+	 * @return the parts; empty if the LCS could not be created
+	 */
+	public List<WordPart> getParts() {
+		return parts;
+	}
+
+	/**
+	 * The same as {@link #getParts()} except that this method will merge differences that are 
+	 * separated only by {@code maxSize} or less characters.  This method allows clients to combine
+	 * many smaller differences into larger differences that span similar characters.  Merging parts
+	 * can reduce visual clutter when displaying the differences, at the expense of accuracy.
+	 * 
+	 * @param maxSize the maximum span of characters past which not to merge two differences
+	 * @return the parts
+	 */
+	public List<WordPart> getMergedParts(int maxSize) {
+
+		List<WordPart> newParts = new ArrayList<>();
+		DifferentPart lastDiffPart = null;
+		for (int i = 0; i < parts.size(); i++) {
+			WordPart part = parts.get(i);
+			if (part instanceof DifferentPart diffPart) {
+				lastDiffPart = diffPart;
+				newParts.add(lastDiffPart);
+				continue;
+			}
+
+			int length = part.length();
+			if (length > maxSize) {
+				continue;
+			}
+
+			if (lastDiffPart != null) {
+				WordPart nextPart = i + 1 < parts.size() ? parts.get(i + 1) : null;
+				WordPart mergedPart = lastDiffPart.merge(part, nextPart);
+				if (mergedPart != null) {
+					i++;
+					newParts.remove(lastDiffPart);
+					newParts.add(mergedPart);
+					lastDiffPart = null;
+				}
+			}
+			// add this non-diff part to the last merged diff part, if any exists
+			else {
+				if (newParts.isEmpty()) {
+					continue;
+				}
+
+				DifferentPart previousDiffPart = (DifferentPart) newParts.getLast();
+				WordPart nextPart = i + 1 < parts.size() ? parts.get(i + 1) : null;
+				WordPart mergedPart = previousDiffPart.merge(part, nextPart);
+				if (mergedPart != null) {
+					i++;
+					newParts.remove(previousDiffPart);
+					newParts.add(mergedPart);
+				}
+			}
+		}
+		return newParts;
+	}
+
+	@Override
+	public String toString() {
+		return parts.stream().map(p -> p.toString()).collect(Collectors.joining());
+	}
+
+	/**
+	 * Turns the LCS match into one or more words that do not match.  This uses the common 
+	 * characters to build a mapping of the different words and their offsets into the new word 
+	 * originally passed to the WordDiffer.
+	 */
+	private TreeMap<Integer, String> buildWordOffsets(LcsMatch match) {
+		// break each word into parts, splitting on each character
+
+		TreeMap<Integer, String> wordsByOffset = new TreeMap<>();
+
+		StringBuilder buffy = new StringBuilder();
+		String word = match.newWord;
+		int wordIndex = 0; // index into the overall 'new word' 
+		for (char c : match.lcs) {
+
+			for (; wordIndex < word.length(); wordIndex++) {
+
+				char wordChar = word.charAt(wordIndex);
+				if (wordChar == c) {
+					int offset = (wordIndex) - buffy.length();
+					saveWord(buffy, offset, wordsByOffset);
+					wordIndex++;
+					break;
+				}
+
+				buffy.append(wordChar);
+			}
+		}
+
+		int offset = wordIndex - buffy.length();
+		saveWord(buffy, offset, wordsByOffset);
+
+		if (wordIndex < word.length()) {
+			// the LCS ended; get the rest of the original word
+			buffy.append(word.substring(wordIndex));
+			saveWord(buffy, wordIndex, wordsByOffset);
+		}
+
+		return wordsByOffset;
+	}
+
+	private void saveWord(StringBuilder buffy, int charPosition,
+			TreeMap<Integer, String> wordIndices) {
+		if (buffy.length() > 0) {
+			wordIndices.put(charPosition, buffy.toString());
+			buffy.setLength(0);
+		}
+	}
+
+	private LcsMatch getLcs(String x, String y) {
+		StringReducingLcs lcs = new StringReducingLcs(x, y);
+		List<Character> lcsList = lcs.getLcs();
+		if (lcsList.isEmpty()) {
+			return null;
+		}
+		if (lcsList.size() < 3) {
+			return null; // what is the min size?
+		}
+
+		LcsMatch match = new LcsMatch(x, y, lcsList);
+		return match;
+	}
+
+	private List<WordPart> createWordParts(String newWord, TreeMap<Integer, String> wordIndices) {
+
+		List<WordPart> results = new ArrayList<>();
+
+		int lastWrittenIndex = 0;
+		Set<Entry<Integer, String>> entrySet = wordIndices.entrySet();
+		for (Entry<Integer, String> entry : entrySet) {
+			Integer index = entry.getKey();
+
+			if (lastWrittenIndex < index) {
+				String text = newWord.substring(lastWrittenIndex, index);
+				results.add(new SamePart(text, lastWrittenIndex));
+			}
+
+			String word = entry.getValue();
+			results.add(new DifferentPart(word, index));
+			lastWrittenIndex = index + word.length();
+
+		}
+
+		if (lastWrittenIndex < newWord.length()) {
+			String text = newWord.substring(lastWrittenIndex);
+			results.add(new SamePart(text, lastWrittenIndex));
+		}
+		return results;
+	}
+
+//=================================================================================================
+// Inner Classes
+//=================================================================================================	
+
+	/**
+	 * A String that is part of a larger String.  This class also has the offset into the original
+	 * String.
+	 */
+	public abstract class WordPart {
+		protected String text;
+		protected int index;
+
+		WordPart(String text, int index) {
+			this.text = text;
+			this.index = index;
+		}
+
+		public int getIndex() {
+			return index;
+		}
+
+		public int length() {
+			return text.length();
+		}
+
+		public String getText() {
+			return text;
+		}
+
+		@Override
+		public String toString() {
+			return text;
+		}
+	}
+
+	public class SamePart extends WordPart {
+		SamePart(String text, int index) {
+			super(text, index);
+		}
+	}
+
+	public class DifferentPart extends WordPart {
+		DifferentPart(String text, int index) {
+			super(text, index);
+		}
+
+		public WordPart merge(WordPart oldPart, WordPart nextPart) {
+			if (!(nextPart instanceof DifferentPart)) {
+				return null;
+			}
+
+			String updatedText = text + oldPart.text + nextPart.text;
+			return new DifferentPart(updatedText, index);
+		}
+
+		@Override
+		public String toString() {
+			return " /" + text + "/ ";
+		}
+	}
+
+	private record LcsMatch(String newWord, String oldWord, List<Character> lcs) {}
+}

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/StringDiff.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -35,12 +35,12 @@ public class StringDiff {
 
 	/**
 	 * String being inserted.  This can be an insert or a complete replace (the positions will both
-	 * be -1 in a replace; pos1 will be non-negative during an insert).
+	 * be -1 in a replace; start will be non-negative during an insert).
 	 */
 	public String text;
 
 	/**
-	 * Construct a new StringDiff with pos1 and pos2 are initialized to -1
+	 * Construct a new StringDiff with start and end are initialized to -1
 	 * 
 	 * @param newText string 
 	 * @return the new diff 
@@ -50,7 +50,7 @@ public class StringDiff {
 	}
 
 	/**
-	 * Construct a new StringDiff that indicates text was deleted from pos1 to pos2
+	 * Construct a new StringDiff that indicates text was deleted from start and end
 	 * 
 	 * @param start position 1 for the diff
 	 * @param end position 2 for the diff
@@ -61,7 +61,7 @@ public class StringDiff {
 	}
 
 	/**
-	 * Construct a new StringDiff that indicates that insertData was inserted at the given position
+	 * Construct a new StringDiff that indicates that newText was inserted at the given position
 	 * 
 	 * @param newText inserted string
 	 * @param start position where the text was inserted

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/StringDiffUtils.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -219,9 +219,11 @@ class StringDiffUtils {
 	}
 
 	/**
-	 * Applies the array of StringObjects to the string s to produce a new string. Warning - the
-	 * diff objects cannot be applied to an arbitrary string, the Strings must be the original
-	 * String used to compute the diffs.
+	 * Applies the array of StringDiffs to the string s to produce a new string.
+	 *  
+	 * <p>Warning: the diff objects cannot be applied to an arbitrary string, the Strings must be 
+	 * the original String used to compute the diffs.
+	 * 
 	 * @param s the original string
 	 * @param diffs the array of StringDiff object to apply
 	 * @return a new String resulting from applying the diffs to s.

Ghidra/Framework/Utility/src/main/java/ghidra/framework/ApplicationVersion.java

@@ -221,7 +221,8 @@ public class ApplicationVersion implements Comparable<ApplicationVersion> {
 		}
 		catch (NumberFormatException e) {
 			throw new IllegalArgumentException(
-				"Failed to convert " + versionPartName + " version to integer");
+				"Failed to convert version to integer: '" + versionPartName + "' value '" +
+					versionPart + "'");
 		}
 	}
 }