ghidra-master/Ghidra/Features/Decompiler/src/main/java/ghidra/app/decompiler/component/hover/ReferenceDecompilerHover.java
/* ###
 * 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.decompiler.component.hover;

import javax.swing.JComponent;

import docking.widgets.fieldpanel.field.Field;
import docking.widgets.fieldpanel.support.FieldLocation;
import ghidra.GhidraOptions;
import ghidra.app.plugin.core.hover.AbstractReferenceHover;
import ghidra.framework.plugintool.PluginTool;
import ghidra.program.model.address.Address;
import ghidra.program.model.listing.Function;
import ghidra.program.model.listing.Program;
import ghidra.program.util.ProgramLocation;

public class ReferenceDecompilerHover extends AbstractReferenceHover
		implements DecompilerHoverService {

	private static final String NAME = "Decompiler Reference Viewer";
	private static final String DESCRIPTION =
		"Shows \"referred to\" code and data from the decompiler.";

	// note: this is relative to other DecompilerHovers; a higher priority gets called first
	// Use high value so this hover gets called first.  The method for determining what the user
	// is hovering in the Decompiler is less then perfect.  We choose to allow the more precise
	// hovers get a chance to process the request first.
	private static final int PRIORITY = 50;

	public ReferenceDecompilerHover(PluginTool tool) {
		super(tool, PRIORITY);
	}

	@Override
	protected String getName() {
		return NAME;
	}

	@Override
	protected String getDescription() {
		return DESCRIPTION;
	}

	@Override
	protected String getOptionsCategory() {
		return GhidraOptions.CATEGORY_DECOMPILER_POPUPS;
	}

	@Override
	public JComponent getHoverComponent(Program program, ProgramLocation location,
			FieldLocation fieldLocation, Field field) {

		if (!enabled || location == null) {
			return null;
		}

		Address refAddr = location.getRefAddress();
		if (refAddr == null) {
			return null;
		}
		Function other = program.getListing().getFunctionAt(refAddr);
		if (other != null) {
			return null;
		}
		return super.getHoverComponent(program, location, fieldLocation, field);

	}

}
