feat(gui): select a class to open via command-line (PR #658)

jadx-cli/src/main/java/jadx/cli/JadxCLIArgs.java

@@ -130,7 +130,7 @@ public class JadxCLIArgs {
 	 * Used to merge saved options and options passed in command line.
 	 */
 	public boolean overrideProvided(String[] args) {
-		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(new JadxCLIArgs());
+		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(newInstance());
 		if (!jcw.parse(args)) {
 			return false;
 		}
@@ -138,6 +138,10 @@ public class JadxCLIArgs {
 		return process(jcw);
 	}
 
+	protected JadxCLIArgs newInstance() {
+		return new JadxCLIArgs();
+	}
+
 	private boolean process(JCommanderWrapper<JadxCLIArgs> jcw) {
 		if (printHelp) {
 			jcw.printUsage();

jadx-gui/src/main/java/jadx/gui/JadxWrapper.java

@@ -8,8 +8,9 @@ import java.util.List;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.stream.Collectors;
 
-import javax.swing.*;
+import javax.swing.ProgressMonitor;
 
+import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -133,4 +134,13 @@ public class JadxWrapper {
 	public JadxArgs getArgs() {
 		return decompiler.getArgs();
 	}
+
+	/**
+	 * @param fullName Full name of an outer class. Inner classes are not supported.
+	 * @return
+	 */
+	public @Nullable JavaClass searchJavaClassByClassName(String fullName) {
+		return decompiler.getClasses().stream().filter(cls -> cls.getFullName().equals(fullName))
+				.findFirst().orElse(null);
+	}
 }

jadx-gui/src/main/java/jadx/gui/settings/JadxSettings.java

@@ -15,13 +15,15 @@ import java.util.Map;
 import java.util.Set;
 import java.util.function.Consumer;
 
-import javax.swing.*;
+import javax.swing.JFrame;
 
 import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
 import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.beust.jcommander.Parameter;
+
 import jadx.api.JadxArgs;
 import jadx.cli.JadxCLIArgs;
 import jadx.gui.ui.MainWindow;
@@ -65,6 +67,10 @@ public class JadxSettings extends JadxCLIArgs {
 
 	private int settingsVersion = 0;
 
+	@JadxSettingsAdapter.GsonExclude
+	@Parameter(names = { "-sc", "--select-class" }, description = "GUI: Open the selected class and show the decompiled code")
+	private String cmdSelectClass = null;
+
 	public static JadxSettings makeDefault() {
 		JadxSettings jadxSettings = new JadxSettings();
 		jadxSettings.fixOnLoad();
@@ -96,6 +102,10 @@ public class JadxSettings extends JadxCLIArgs {
 		}
 	}
 
+	public String getCmdSelectClass() {
+		return cmdSelectClass;
+	}
+
 	public Path getLastOpenFilePath() {
 		return lastOpenFilePath;
 	}
@@ -412,4 +422,8 @@ public class JadxSettings extends JadxCLIArgs {
 		sync();
 	}
 
+	@Override
+	protected JadxCLIArgs newInstance() {
+		return new JadxSettings();
+	}
 }

jadx-gui/src/main/java/jadx/gui/settings/JadxSettingsAdapter.java

 package jadx.gui.settings;
 
 import java.awt.Rectangle;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 import java.lang.reflect.Modifier;
 import java.nio.file.Path;
 import java.util.prefs.Preferences;
@@ -31,7 +35,8 @@ public class JadxSettingsAdapter {
 		public boolean shouldSkipField(FieldAttributes f) {
 			return JadxSettings.SKIP_FIELDS.contains(f.getName())
 					|| f.hasModifier(Modifier.PUBLIC)
-					|| f.hasModifier(Modifier.TRANSIENT);
+					|| f.hasModifier(Modifier.TRANSIENT)
+					|| (f.getAnnotation(GsonExclude.class) != null);
 		}
 
 		@Override
@@ -96,4 +101,12 @@ public class JadxSettingsAdapter {
 				.create()
 				.fromJson(json, type);
 	}
+
+	/**
+	 * Annotation for specifying fields that should not be be saved/loaded
+	 */
+	@Retention(RetentionPolicy.RUNTIME)
+	@Target(ElementType.FIELD)
+	public @interface GsonExclude {
+	}
 }

jadx-gui/src/main/java/jadx/gui/ui/MainWindow.java

@@ -67,6 +67,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import jadx.api.JadxArgs;
+import jadx.api.JavaNode;
 import jadx.api.ResourceFile;
 import jadx.gui.JadxWrapper;
 import jadx.gui.jobs.BackgroundWorker;
@@ -178,10 +179,25 @@ public class MainWindow extends JFrame {
 			}
 		});
 
+		processCommandLineArgs();
+	}
+
+	private void processCommandLineArgs() {
 		if (settings.getFiles().isEmpty()) {
 			openFileOrProject();
 		} else {
 			open(Paths.get(settings.getFiles().get(0)));
+			if (settings.getCmdSelectClass() != null) {
+				JavaNode javaNode = wrapper.searchJavaClassByClassName(settings.getCmdSelectClass());
+				if (javaNode == null) {
+					JOptionPane.showMessageDialog(this,
+							NLS.str("msg.cmd_select_class_error", settings.getCmdSelectClass()),
+							NLS.str("error_dialog.title"), JOptionPane.ERROR_MESSAGE);
+				} else {
+					JNode node = cacheObject.getNodeCache().makeFrom(javaNode);
+					tabbedPane.codeJump(new JumpPosition(node.getRootClass(), node.getLine()));
+				}
+			}
 		}
 	}
 

jadx-gui/src/main/resources/i18n/Messages_en_US.properties

@@ -32,6 +32,8 @@ tree.sources_title=Source code
 tree.resources_title=Resources
 tree.loading=Loading...
 
+error_dialog.title=Error
+
 search.previous=Previous
 search.next=Next
 search.mark_all=Mark All
@@ -131,6 +133,7 @@ msg.project_error_title=Error
 msg.project_error=Project could not be loaded
 msg.rename_disabled_title=Rename disabled
 msg.rename_disabled=Some of rename settings are disabled, please take this into consideration
+msg.cmd_select_class_error=Failed to select the class\n%s\nThe class does not exist. 
 
 popup.undo=Undo
 popup.redo=Redo

jadx-gui/src/main/resources/i18n/Messages_es_ES.properties

@@ -32,6 +32,8 @@ tree.sources_title=Código fuente
 tree.resources_title=Recursos
 tree.loading=Cargando...
 
+#error_dialog.title=
+
 search.previous=Anterior
 search.next=Siguiente
 search.mark_all=Marcar todo
@@ -131,6 +133,7 @@ msg.index_not_initialized=Índice no inicializado, ¡la bósqueda se desactivar
 #msg.project_error=
 #msg.rename_disabled_title=
 #msg.rename_disabled=
+#msg.cmd_select_class_error=
 
 popup.undo=Deshacer
 popup.redo=Rehacer

jadx-gui/src/main/resources/i18n/Messages_zh_CN.properties

@@ -32,6 +32,8 @@ tree.sources_title=源代码
 tree.resources_title=资源文件
 tree.loading=稍等...
 
+#error_dialog.title=
+
 search.previous=上一个
 search.next=下一个
 search.mark_all=标记全部
@@ -131,6 +133,7 @@ msg.index_not_initialized=索引尚未初始化，无法进行搜索！
 #msg.project_error=
 #msg.rename_disabled_title=
 #msg.rename_disabled=
+#msg.cmd_select_class_error=
 
 popup.undo=撤销
 popup.redo=重做