Merge remote-tracking branch

'origin/GP-5326_ghidragon_edit_structure_field--SQUASHED' (Closes #7407)

Ghidra/Features/Base/certification.manifest

@@ -308,6 +308,7 @@ src/main/help/help/topics/DataPlugin/images/CreateStructureDialog.png||GHIDRA|||
 src/main/help/help/topics/DataPlugin/images/CreateStructureDialogWithTableSelection.png||GHIDRA||||END|
 src/main/help/help/topics/DataPlugin/images/DataSelectionSettings.png||GHIDRA||||END|
 src/main/help/help/topics/DataPlugin/images/DefaultSettings.png||GHIDRA||||END|
+src/main/help/help/topics/DataPlugin/images/EditFieldDialog.png||GHIDRA||||END|
 src/main/help/help/topics/DataPlugin/images/InstanceSettings.png||GHIDRA||||END|
 src/main/help/help/topics/DataTypeEditors/DataTypeSelectionDialog.htm||GHIDRA||||END|
 src/main/help/help/topics/DataTypeEditors/EnumEditor.htm||GHIDRA||||END|

Ghidra/Features/Base/src/main/help/help/topics/DataPlugin/Data.htm

@@ -970,21 +970,14 @@
         quickly changing the name of a single member:</P>
 
         <OL>
-          <LI>Right mouse click on the field name of a structure member in the Code Browser</LI>
+          <LI>Right mouse click on a structure member in the Listing</LI>
 
-          <LI>Choose the <B>Data</B><IMG src="help/shared/arrow.gif"> <B>Rename Field</B>
-          option</LI>
+          <LI>Choose the <B>Data</B><IMG src="help/shared/arrow.gif"> <B>Edit Field</B>
+          action to bring the up the <A href=
+          "#Edit_Field_Dialog">Edit Field Dialog</A> </LI>
 
-          <LI>Enter a new name in the <B>Rename Data Field</B> dialog</LI>
         </OL>
 
-        <BLOCKQUOTE>
-          <P><IMG src="help/shared/note.png">The&nbsp; "Field Name" field must be added to the
-          "Open Data" tab in the Code Browser <A href=
-          "../CodeBrowserPlugin/Browser_Field_Formatter.htm">header</A> in order for the
-          data structure field names to show up in the Code Browser.</P>
-        </BLOCKQUOTE>
-
         <P>The second way is more useful for changing the names of multiple members:</P>
 
         <OL>
@@ -996,10 +989,6 @@
           <LI>Edit the field name for the structure member</LI>
         </OL>
 
-        <BLOCKQUOTE>
-          <P><IMG src="help/shared/note.png"> You cannot set the field name of undefined
-          member</P>
-        </BLOCKQUOTE>
       </BLOCKQUOTE>
     </BLOCKQUOTE>
 
@@ -1374,6 +1363,27 @@
     </BLOCKQUOTE>
           </BLOCKQUOTE>
           
+    <H2><A name="Edit_Field"></A>Quick Editing of a Structure or Union Field</H2>
+    <BLOCKQUOTE>
+    <P>As a convenience, a structure or union field can be edited directly from the listing without
+    bringing up the entire structure or union editor. To edit a field, click anywhere on the line
+    displaying that field in the listing and then right click and select <B>Data</B><IMG 
+    src="help/shared/arrow.gif"> <B>Edit Field</B> from the popup context menu.</P>
+    <H3><A name="Edit_Field_Dialog"></A>Edit Field Dialog</H3>
+          <P align="center"><IMG src="images/EditFieldDialog.png" alt=""> &nbsp;</P>
+    <UL>
+    	<LI><B>Field Name</B>: The name of the structure or union field can be changed here.</LI>
+    	<LI><B>Comment</B>: The comment for the field can be entered or changed here.</LI>
+    	<LI><B>DataType</B>: The data can be changed here. The text field is read only so you must
+    	press the ... button to bring up the datatype chooser to change the datatype.</LI>
+         <P><IMG src="help/shared/note.png"> If a default field (a field with an undefined
+         datatype (??)) is named or given a comment, the datatype will be set to <B>undefined1</B> if
+         no specific datatype is set. This is because undefined fields are not stored and therefore
+         can't have an associated name or comment.</P>
+    
+    </BLOCKQUOTE>
+    
+
     <P class="providedbyplugin">Provided By: <I>Data</I> Plugin</P>
 
     <P class="relatedtopic">Related Topics:</P>

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/data/DataPlugin.java

@@ -34,6 +34,7 @@ import ghidra.app.plugin.core.compositeeditor.*;
 import ghidra.app.plugin.core.datamgr.DataTypesActionContext;
 import ghidra.app.plugin.core.datamgr.tree.DataTypeNode;
 import ghidra.app.plugin.core.datamgr.tree.DataTypeTreeNode;
+import ghidra.app.plugin.core.datamgr.util.DataTypeUtils;
 import ghidra.app.services.DataService;
 import ghidra.app.services.DataTypeManagerService;
 import ghidra.docking.settings.SettingsDefinition;
@@ -100,7 +101,6 @@ public class DataPlugin extends Plugin implements DataService {
 	private DockingAction editDataTypeAction;
 	private CreateStructureAction createStructureAction;
 	private CreateArrayAction createArrayAction;
-	private RenameDataFieldAction renameDataFieldAction;
 
 	private List<DataAction> favoriteActions = new ArrayList<>();
 
@@ -113,7 +113,7 @@ public class DataPlugin extends Plugin implements DataService {
 	public DataPlugin(PluginTool tool) {
 		super(tool);
 
-		addActions();
+		createActions();
 
 		favoritesUpdateManager = new SwingUpdateManager(1000, 30000, () -> updateFavoriteActions());
 	}
@@ -135,7 +135,7 @@ public class DataPlugin extends Plugin implements DataService {
 	/**
 	 * Add actions
 	 */
-	private void addActions() {
+	private void createActions() {
 		recentlyUsedAction = new RecentlyUsedAction(this);
 		recentlyUsedAction.setEnabled(false);
 
@@ -147,12 +147,17 @@ public class DataPlugin extends Plugin implements DataService {
 		createArrayAction = new CreateArrayAction(this);
 		tool.addAction(createArrayAction);
 
-		renameDataFieldAction = new RenameDataFieldAction(this);
-		tool.addAction(renameDataFieldAction);
-
 		pointerAction = new PointerDataAction(this);
 		tool.addAction(pointerAction);
 
+		new ActionBuilder("Edit Field", getName())
+				.popupMenuPath("Data", "Edit Field")
+				.keyBinding("ctrl shift E")
+				.withContext(ListingActionContext.class)
+				.enabledWhen(this::canEditField)
+				.onAction(this::editField)
+				.buildAndInstall(tool);
+
 		// Data instance settings action based upon data selection in listing
 		new ActionBuilder("Data Settings", getName()).sharedKeyBinding()
 				.popupMenuPath(DATA_SETTINGS_POPUP_PATH)
@@ -832,4 +837,27 @@ public class DataPlugin extends Plugin implements DataService {
 		return true;
 	}
 
+	public DataType pickDataType() {
+		return dtmService.getDataType("");
+	}
+
+	private boolean canEditField(ListingActionContext context) {
+		ProgramLocation location = context.getLocation();
+		int[] componentPath = location.getComponentPath();
+		return componentPath != null && componentPath.length > 0;
+	}
+
+	private void editField(ListingActionContext context) {
+		Program program = context.getProgram();
+		ProgramLocation location = context.getLocation();
+		Address address = location.getAddress();
+		int[] path = location.getComponentPath();
+		DataTypeComponent component = DataTypeUtils.getDataTypeComponent(program, address, path);
+		if (component != null) {
+			EditDataFieldDialog dialog =
+				new EditDataFieldDialog(tool, dtmService, location, component);
+			tool.showDialog(dialog);
+		}
+	}
+
 }

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/data/EditDataFieldDialog.java

@@ -0,0 +1,305 @@
+/* ###
+ * 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 ghidra.app.plugin.core.data;
+
+import java.awt.BorderLayout;
+
+import javax.swing.*;
+
+import org.apache.commons.lang3.StringUtils;
+
+import docking.DialogComponentProvider;
+import docking.widgets.button.BrowseButton;
+import ghidra.app.cmd.data.CreateDataInStructureCmd;
+import ghidra.app.plugin.core.datamgr.util.DataTypeUtils;
+import ghidra.app.services.DataTypeManagerService;
+import ghidra.framework.cmd.Command;
+import ghidra.framework.plugintool.PluginTool;
+import ghidra.program.model.address.Address;
+import ghidra.program.model.data.*;
+import ghidra.program.model.listing.Program;
+import ghidra.program.util.ProgramLocation;
+import ghidra.util.HelpLocation;
+import ghidra.util.MessageType;
+import ghidra.util.exception.DuplicateNameException;
+import ghidra.util.layout.PairLayout;
+
+/**
+ * Dialog for editing the name, comment, and datatype for a structure or union field.
+ */
+public class EditDataFieldDialog extends DialogComponentProvider {
+
+	private JTextField nameField;
+	private JTextField commentField;
+	private JTextField dataTypeTextField;
+
+	private DataTypeComponent component;
+	private PluginTool tool;
+	private DataType newDataType;
+	private ProgramLocation programLocation;
+	private DataTypeManagerService dtmService;
+
+	/**
+	 * Constructor
+	 * @param tool The tool hosting this dialog
+	 * @param dtmService the DataTypeManagerService used for choosing datatypes
+	 * @param location the location of the field being edited
+	 * @param dataTypeComponent the component of the field being edited
+	 */
+	public EditDataFieldDialog(PluginTool tool, DataTypeManagerService dtmService,
+			ProgramLocation location, DataTypeComponent dataTypeComponent) {
+		super("Edit Field Dialog", true, true, true, false);
+		this.tool = tool;
+		this.dtmService = dtmService;
+		this.programLocation = location;
+		this.component = dataTypeComponent;
+		setTitle(generateTitle());
+
+		addWorkPanel(buildMainPanel());
+		initializeFields();
+		setFocusComponent(nameField);
+		setHelpLocation(new HelpLocation("DataPlugin", "Edit_Field_Dialog"));
+
+		addOKButton();
+		addCancelButton();
+	}
+
+	@Override
+	public void dispose() {
+		super.dispose();
+		programLocation = null;
+		component = null;
+		tool = null;
+	}
+
+	/**
+	 * Returns the pending new datatype to change to.
+	 * @return the pending new datatype to change to
+	 */
+	public DataType getNewDataType() {
+		return newDataType != null ? newDataType : new Undefined1DataType();
+	}
+
+	/**
+	 * Returns the text currently in the text field  for the field name.
+	 * @return the text currently in the text field  for the field name
+	 */
+	public String getNameText() {
+		return nameField.getText();
+	}
+
+	/**
+	 * Sets the dialog's name text field to the given text.
+	 * @param newName the text to put into the name text field
+	 */
+	public void setNameText(String newName) {
+		nameField.setText(newName);
+	}
+
+	/**
+	 * Returns the text currently in the text field for the field comment.
+	 * @return the text currently in the text field  for the field commment
+	 */
+	public String getCommentText() {
+		return commentField.getText();
+	}
+
+	/**
+	 * Sets the dialog's comment text field to the given text.
+	 * @param newComment the text to put into the comment text field
+	 */
+	public void setCommentText(String newComment) {
+		commentField.setText(newComment);
+	}
+
+	/**
+	 * Sets the pending new datatype and updates the datatype text field to the name of that
+	 * datatype.
+	 * @param dataType the new pending datatype
+	 */
+	public void setDataType(DataType dataType) {
+		newDataType = dataType;
+		updateDataTypeTextField();
+	}
+
+	private void initializeFields() {
+		String name = component.getFieldName();
+		if (StringUtils.isBlank(name)) {
+			name = component.getDefaultFieldName();
+		}
+		nameField.setText(name);
+		commentField.setText(component.getComment());
+		dataTypeTextField.setText(component.getDataType().getDisplayName());
+	}
+
+	@Override
+	protected void okCallback() {
+		if (updateComponent()) {
+			close();
+			programLocation = null;
+		}
+	}
+
+	private boolean updateComponent() {
+		if (!hasChanges()) {
+			return true;
+		}
+		Command<Program> cmd = new UpdateDataComponentCommand();
+		if (!tool.execute(cmd, programLocation.getProgram())) {
+			setStatusText(cmd.getStatusMsg(), MessageType.ERROR);
+			return false;
+		}
+		return true;
+	}
+
+	private boolean hasChanges() {
+		return hasNameChange() || hasCommentChange() || hasDataTypeChange();
+	}
+
+	private boolean hasCommentChange() {
+		String newComment = getNewFieldComment();
+		if (StringUtils.isBlank(newComment) && StringUtils.isBlank(component.getComment())) {
+			return false;
+		}
+		return !newComment.equals(component.getComment());
+	}
+
+	boolean hasDataTypeChange() {
+		return newDataType != null && !newDataType.equals(component.getDataType());
+	}
+
+	boolean hasNameChange() {
+		String newName = getNewFieldName();
+		if (newName.equals(component.getFieldName())) {
+			return false;
+		}
+		if (newName.equals(component.getDefaultFieldName())) {
+			return false;
+		}
+		return true;
+	}
+
+	private String getNewFieldName() {
+		return nameField.getText().trim();
+	}
+
+	private String getNewFieldComment() {
+		return commentField.getText().trim();
+	}
+
+	private JPanel buildMainPanel() {
+		JPanel panel = new JPanel(new PairLayout(10, 10));
+		panel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
+
+		nameField = new JTextField(20);
+		nameField.setEditable(true);
+		nameField.addActionListener(e -> okCallback());
+		commentField = new JTextField(20);
+		commentField.setEditable(true);
+		commentField.addActionListener(e -> okCallback());
+
+		panel.add(new JLabel("Field Name:", SwingConstants.LEFT));
+		panel.add(nameField);
+		panel.add(new JLabel("Comment:", SwingConstants.LEFT));
+		panel.add(commentField);
+		panel.add(new JLabel("Datatype:", SwingConstants.LEFT));
+		panel.add(buildDataTypeChooserPanel());
+
+		return panel;
+	}
+
+	private JPanel buildDataTypeChooserPanel() {
+		JPanel panel = new JPanel(new BorderLayout(10, 0));
+
+		dataTypeTextField = new JTextField();
+		dataTypeTextField.setEditable(false);
+		BrowseButton browseButton = new BrowseButton();
+		browseButton.setToolTipText("Browse the Data Manager");
+		browseButton.addActionListener(e -> showDataTypeBrowser());
+
+		panel.add(dataTypeTextField, BorderLayout.CENTER);
+		panel.add(browseButton, BorderLayout.EAST);
+		return panel;
+	}
+
+	private void showDataTypeBrowser() {
+		newDataType = dtmService.getDataType("");
+		updateDataTypeTextField();
+	}
+
+	private void updateDataTypeTextField() {
+		if (newDataType != null) {
+			dataTypeTextField.setText(newDataType.getDisplayName());
+		}
+		else {
+			dataTypeTextField.setText(component.getDataType().getDisplayName());
+		}
+	}
+
+	private String generateTitle() {
+		DataType parent = component.getParent();
+		String compositeName = parent.getName();
+		return "Edit " + compositeName + ", Field " + component.getOrdinal();
+	}
+
+	public String getDataTypeText() {
+		return dataTypeTextField.getText();
+	}
+
+	private class UpdateDataComponentCommand implements Command<Program> {
+		private String statusMessage = null;
+
+		@Override
+		public boolean applyTo(Program program) {
+			if (component.isUndefined() || hasDataTypeChange()) {
+				DataType dt = getNewDataType();
+				Address address = programLocation.getAddress();
+				int[] path = programLocation.getComponentPath();
+				Command<Program> cmd = new CreateDataInStructureCmd(address, path, dt, false);
+				if (!cmd.applyTo(program)) {
+					statusMessage = cmd.getStatusMsg();
+					return false;
+				}
+				component = DataTypeUtils.getDataTypeComponent(program, address, path);
+			}
+			if (hasNameChange()) {
+				try {
+					component.setFieldName(getNewFieldName());
+				}
+				catch (DuplicateNameException e) {
+					statusMessage = "Duplicate field name";
+					return false;
+				}
+			}
+			if (hasCommentChange()) {
+				component.setComment(getNewFieldComment());
+			}
+			return true;
+		}
+
+		@Override
+		public String getStatusMsg() {
+			return statusMessage;
+		}
+
+		@Override
+		public String getName() {
+			return "Update Structure Field";
+		}
+
+	}
+
+}

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/data/RenameDataFieldAction.java

@@ -1,89 +0,0 @@
-/* ###
- * 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 ghidra.app.plugin.core.data;
-
-import java.awt.event.KeyEvent;
-
-import docking.action.KeyBindingData;
-import docking.action.MenuData;
-import ghidra.app.context.ListingActionContext;
-import ghidra.app.context.ListingContextAction;
-import ghidra.framework.plugintool.PluginTool;
-import ghidra.program.model.data.*;
-import ghidra.program.model.listing.Data;
-import ghidra.program.model.listing.Program;
-import ghidra.program.util.FieldNameFieldLocation;
-import ghidra.program.util.ProgramLocation;
-
-/**
- * Base class for comment actions to edit and delete comments.
- */
-class RenameDataFieldAction extends ListingContextAction {
-
-	private DataPlugin plugin;
-
-	public RenameDataFieldAction(DataPlugin plugin) {
-		super("Rename Data Field", plugin.getName());
-
-		setPopupMenuData(
-			new MenuData(
-				new String[] { "Data", "Rename Field" }, null, "BasicData"));
-
-		setKeyBindingData(new KeyBindingData(
-			KeyEvent.VK_N, 0));
-
-		this.plugin = plugin;
-		setEnabled(true);
-	}
-
-	@Override
-	protected void actionPerformed(ListingActionContext context) {
-		ListingActionContext programActionContext =
-			(ListingActionContext) context.getContextObject();
-		PluginTool tool = plugin.getTool();
-		Program program = programActionContext.getProgram();
-		ProgramLocation loc = programActionContext.getLocation();
-		Data data = program.getListing().getDataContaining(loc.getAddress());
-		DataType type = data.getDataType();
-
-		if (type instanceof Composite) {
-			Composite comp = (Composite) type;
-			int[] compPath = loc.getComponentPath();
-			for (int i = 0; i < compPath.length - 1; i++) {
-				DataTypeComponent subComp = comp.getComponent(compPath[i]);
-				type = subComp.getDataType();
-				if (type instanceof Composite) {
-					comp = (Composite) type;
-				}
-				else {
-					return;
-				}
-			}
-
-			Data instance = data.getComponent(compPath);
-			DataTypeComponent subComp = comp.getComponent(compPath[compPath.length - 1]);
-			RenameDataFieldDialog dialog = new RenameDataFieldDialog(plugin);
-			dialog.setDataComponent(program, subComp, instance.getFieldName());
-			tool.showDialog(dialog);
-		}
-	}
-
-	@Override
-	protected boolean isEnabledForContext(ListingActionContext context) {
-		return (context.getLocation() instanceof FieldNameFieldLocation);
-	}
-
-}

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/util/DataTypeUtils.java

@@ -24,8 +24,12 @@ import javax.swing.Icon;
 import generic.theme.GColor;
 import generic.theme.GIcon;
 import ghidra.app.services.DataTypeQueryService;
+import ghidra.program.model.address.Address;
 import ghidra.program.model.data.*;
+import ghidra.program.model.data.Composite;
 import ghidra.program.model.data.Enum;
+import ghidra.program.model.listing.Data;
+import ghidra.program.model.listing.Program;
 import ghidra.util.Msg;
 import ghidra.util.exception.AssertException;
 import resources.MultiIcon;
@@ -469,6 +473,30 @@ public class DataTypeUtils {
 		return index;
 	}
 
+	/**
+	 * Finds the DataTypeComponent at an address and component path in a program.
+	 * @param program the program to look for a datatype component
+	 * @param address the address to look for a datatype component
+	 * @param componentPath the component path (an array of indexes into hierarchy of nested
+	 * datatypes)
+	 * @return The datatype component at that address and component path or null if there is
+	 * none at that location.
+	 */
+	public static DataTypeComponent getDataTypeComponent(Program program, Address address,
+			int[] componentPath) {
+		Data data = program.getListing().getDataContaining(address);
+		DataType dt = data.getDataType();
+		DataTypeComponent comp = null;
+		for (int i = 0; i < componentPath.length; i++) {
+			if (!(dt instanceof Composite composite)) {
+				return null;
+			}
+			comp = composite.getComponent(componentPath[i]);
+			dt = comp.getDataType();
+		}
+		return comp;
+	}
+
 	// finds the index of the first element in the given list--this is used in conjunction with
 	// the binary search, which doesn't produce the desired results when searching lists with 
 	// duplicates

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/searchtext/SearchTextPlugin.java

@@ -383,7 +383,7 @@ public class SearchTextPlugin extends ProgramPlugin implements OptionsChangeList
 		new ActionBuilder("Search Text", getName())
 				.menuPath("&Search", "Program &Text...")
 				.menuGroup("search", subGroup)
-				.keyBinding("ctrl shift E")
+				.keyBinding("ctrl F")
 				.description(DESCRIPTION)
 				.helpLocation(new HelpLocation(HelpTopics.SEARCH, "Search Text"))
 				.withContext(NavigatableActionContext.class, true)

Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/data/EditFieldDialogTest.java

@@ -0,0 +1,232 @@
+/* ###
+ * 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 ghidra.app.plugin.core.data;
+
+import static org.junit.Assert.*;
+
+import org.junit.*;
+
+import docking.action.DockingActionIf;
+import ghidra.app.plugin.core.codebrowser.CodeBrowserPlugin;
+import ghidra.framework.plugintool.PluginTool;
+import ghidra.program.model.address.Address;
+import ghidra.program.model.data.*;
+import ghidra.program.model.listing.Data;
+import ghidra.program.model.listing.Program;
+import ghidra.test.*;
+
+public class EditFieldDialogTest extends AbstractGhidraHeadedIntegrationTest {
+	private TestEnv env;
+	private PluginTool tool;
+	private Program program;
+	private DockingActionIf editFieldAction;
+	private EditDataFieldDialog dialog;
+	private CodeBrowserPlugin codeBrowser;
+	private Structure structure;
+
+	@Before
+	public void setUp() throws Exception {
+		env = new TestEnv();
+		tool = env.getTool();
+		tool.addPlugin(DataPlugin.class.getName());
+		tool.addPlugin(CodeBrowserPlugin.class.getName());
+
+		DataPlugin plugin = getPlugin(tool, DataPlugin.class);
+		codeBrowser = env.getPlugin(CodeBrowserPlugin.class);
+
+		program = buildProgram();
+		env.open(program);
+		env.showTool();
+		editFieldAction = getAction(plugin, "Edit Field");
+		Data dataAt = program.getListing().getDataAt(addr(0x100));
+		structure = (Structure) dataAt.getDataType();
+		codeBrowser.toggleOpen(dataAt);
+		waitForSwing();
+	}
+
+	private Program buildProgram() throws Exception {
+		ToyProgramBuilder builder = new ToyProgramBuilder("Test", true);
+		builder.createMemory("Test", "0", 1000);
+		StructureDataType struct = new StructureDataType("TestStruct", 4);
+		struct.add(new WordDataType(), "count", "This is the count field");
+		struct.add(new WordDataType(), "color", "This is the color field");
+		builder.applyDataType("0x100", struct);
+		return builder.getProgram();
+
+	}
+
+	@After
+	public void tearDown() throws Exception {
+		env.dispose();
+	}
+
+	@Test
+	public void testEditDefinedFieldName() {
+		goTo(0x104);
+		showFieldEditDialog();
+		assertEquals("count", structure.getComponent(4).getFieldName());
+		assertEquals("count", getNameText());
+
+		setNameText("weight");
+
+		pressOk();
+		waitForTasks();
+		assertEquals("weight", structure.getComponent(4).getFieldName());
+	}
+
+	@Test
+	public void testEditDefinedFieldComment() {
+		goTo(0x104);
+		showFieldEditDialog();
+		assertEquals("This is the count field", structure.getComponent(4).getComment());
+		assertEquals("This is the count field", getCommentText());
+
+		setCommentText("This is the weight field");
+
+		pressOk();
+		waitForTasks();
+		assertEquals("This is the weight field", structure.getComponent(4).getComment());
+	}
+
+	@Test
+	public void testEditDefinedFieldDataType() {
+		goTo(0x104);
+		showFieldEditDialog();
+		assertEquals("word", structure.getComponent(4).getDataType().getDisplayName());
+		assertEquals("word", getDataTypeText());
+
+		setDataType(new CharDataType());
+
+		pressOk();
+
+		waitForTasks();
+		assertFalse(isDialogVisible());
+
+		assertEquals("char", structure.getComponent(4).getDataType().getDisplayName());
+	}
+
+	@Test
+	public void testEditUndefinedFieldName() {
+		goTo(0x101);
+		showFieldEditDialog();
+		assertNull(structure.getComponent(1).getFieldName());
+		assertEquals("field1_0x1", getNameText());
+
+		setNameText("abc");
+
+		pressOk();
+		waitForTasks();
+		assertEquals("abc", structure.getComponent(1).getFieldName());
+		assertEquals("undefined1", structure.getComponent(1).getDataType().getDisplayName());
+	}
+
+	@Test
+	public void testEditUndefinedComment() {
+		goTo(0x101);
+		showFieldEditDialog();
+		assertNull(structure.getComponent(1).getComment());
+		assertEquals("", getCommentText());
+
+		setCommentText("comment");
+
+		pressOk();
+		waitForTasks();
+		assertEquals("comment", structure.getComponent(1).getComment());
+		assertEquals("undefined1", structure.getComponent(1).getDataType().getDisplayName());
+	}
+
+	@Test
+	public void testEditUndefinedDataType() {
+		goTo(0x101);
+		showFieldEditDialog();
+		assertNull(structure.getComponent(1).getComment());
+		assertEquals("undefined", getDataTypeText());
+
+		setDataType(new ByteDataType());
+
+		pressOk();
+		waitForTasks();
+		assertEquals("byte", structure.getComponent(1).getDataType().getDisplayName());
+	}
+
+	@Test
+	public void testRenameToDuplicateNameError() {
+		goTo(0x104);
+		showFieldEditDialog();
+		assertEquals("count", structure.getComponent(4).getFieldName());
+		assertEquals("count", getNameText());
+
+		setNameText("color");
+
+		pressOk();
+		waitForTasks();
+		assertTrue(isDialogVisible());
+		assertEquals("Duplicate field name", getDialogStatusText());
+
+		assertEquals("count", structure.getComponent(4).getFieldName());
+	}
+
+	private boolean isDialogVisible() {
+		return runSwing(() -> dialog.isVisible());
+	}
+
+	private void showFieldEditDialog() {
+		performAction(editFieldAction, false);
+		dialog = waitForDialogComponent(EditDataFieldDialog.class);
+	}
+
+	private void goTo(long addressOffset) {
+		Address address = addr(addressOffset);
+		codeBrowser.goToField(address, "Address", 0, 0);
+		waitForSwing();
+	}
+
+	private Address addr(long offset) {
+		return program.getAddressFactory().getDefaultAddressSpace().getAddress(offset);
+	}
+
+	private void pressOk() {
+		runSwing(() -> dialog.okCallback());
+	}
+
+	private String getNameText() {
+		return runSwing(() -> dialog.getNameText());
+	}
+
+	private void setNameText(String newName) {
+		runSwing(() -> dialog.setNameText(newName));
+	}
+
+	private String getCommentText() {
+		return runSwing(() -> dialog.getCommentText());
+	}
+
+	private void setCommentText(String newComment) {
+		runSwing(() -> dialog.setCommentText(newComment));
+	}
+
+	private String getDataTypeText() {
+		return runSwing(() -> dialog.getDataTypeText());
+	}
+
+	private void setDataType(DataType dataType) {
+		runSwing(() -> dialog.setDataType(dataType));
+	}
+
+	private String getDialogStatusText() {
+		return runSwing(() -> dialog.getStatusText());
+	}
+}

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/DataTypeComponentDB.java

@@ -455,11 +455,8 @@ class DataTypeComponentDB implements InternalDataTypeComponent {
 		return InternalDataTypeComponent.toString(this);
 	}
 
-	/**
-	 * Determine if component is an undefined filler component
-	 * @return true if undefined filler component, else false
-	 */
-	boolean isUndefined() {
+	@Override
+	public boolean isUndefined() {
 		return record == null && cachedDataType == null;
 	}
 

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/AlignedStructureInspector.java

@@ -146,6 +146,11 @@ public class AlignedStructureInspector extends AlignedStructurePacker {
 			this.dataType = dataType;
 		}
 
+		@Override
+		public boolean isUndefined() {
+			return component.isUndefined();
+		}
+
 	}
 
 	/**

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeComponent.java

@@ -173,4 +173,10 @@ public interface DataTypeComponent {
 		return false;
 	}
 
+	/**
+	 * Returns true if this this component is not defined. It is just a placeholder.
+	 * @return true if this this component is not defined. It is just a placeholder.
+	 */
+	public boolean isUndefined();
+
 }

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeComponentImpl.java

@@ -334,11 +334,8 @@ public class DataTypeComponentImpl implements InternalDataTypeComponent, Seriali
 		dataType = dt;
 	}
 
-	/**
-	 * Determine if component is an undefined filler component
-	 * @return true if undefined filler component, else false
-	 */
-	boolean isUndefined() {
+	@Override
+	public boolean isUndefined() {
 		return dataType == DataType.DEFAULT;
 	}
 

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/ReadOnlyDataTypeComponent.java

@@ -195,4 +195,9 @@ public class ReadOnlyDataTypeComponent implements DataTypeComponent, Serializabl
 		return s1.equals(s2);
 	}
 
+	@Override
+	public boolean isUndefined() {
+		return dataType == DataType.DEFAULT;
+	}
+
 }

Ghidra/Test/IntegrationTest/src/screen/java/help/screenshot/DataPluginScreenShots.java

@@ -39,6 +39,16 @@ public class DataPluginScreenShots extends GhidraScreenShotGenerator {
 		captureDialog(500, 400);
 	}
 
+	@Test
+	public void testEditFieldDialog() {
+		positionListingTop(0x400080);
+		positionCursor(0x400080, "+");
+		leftClickCursor();
+		positionListingTop(0x4000a4);
+		performAction("Edit Field", "DataPlugin", false);
+		captureDialog();
+	}
+
 	@Test
 	public void testCreateStructureDialogWithTableSelection() {
 		positionListingTop(0x40d3a4);