feat: add an option to generate kotlin code for xposed (PR #2070)

* feat: add an option to generate kotlin code for xposed

A new setting was added, bumping the settings version to 19.

* refactor: applied spotless

* refactor: fixed formatting

* refactor: fixed formatting once again

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

@@ -52,7 +52,7 @@ public class JadxSettings extends JadxCLIArgs {
 
 	private static final Path USER_HOME = Paths.get(System.getProperty("user.home"));
 	private static final int RECENT_PROJECTS_COUNT = 30;
-	private static final int CURRENT_SETTINGS_VERSION = 18;
+	private static final int CURRENT_SETTINGS_VERSION = 19;
 
 	private static final Font DEFAULT_FONT = new RSyntaxTextArea().getFont();
 
@@ -110,6 +110,8 @@ public class JadxSettings extends JadxCLIArgs {
 
 	private boolean jumpOnDoubleClick = true;
 
+	private XposedCodegenLanguage xposedCodegenLanguage = XposedCodegenLanguage.JAVA;
+
 	/**
 	 * UI setting: the width of the tree showing the classes, resources, ...
 	 */
@@ -732,6 +734,14 @@ public void setDockLogViewer(boolean dockLogViewer) {
 		partialSync(settings -> this.dockLogViewer = dockLogViewer);
 	}
 
+	public XposedCodegenLanguage getXposedCodegenLanguage() {
+		return xposedCodegenLanguage;
+	}
+
+	public void setXposedCodegenLanguage(XposedCodegenLanguage language) {
+		this.xposedCodegenLanguage = language;
+	}
+
 	private void upgradeSettings(int fromVersion) {
 		LOG.debug("upgrade settings from version: {} to {}", fromVersion, CURRENT_SETTINGS_VERSION);
 		if (fromVersion <= 10) {
@@ -769,6 +779,10 @@ private void upgradeSettings(int fromVersion) {
 			checkForUpdates = true;
 			fromVersion++;
 		}
+		if (fromVersion == 18) {
+			xposedCodegenLanguage = XposedCodegenLanguage.JAVA;
+			fromVersion++;
+		}
 		if (fromVersion != CURRENT_SETTINGS_VERSION) {
 			LOG.warn("Incorrect settings upgrade. Expected version: {}, got: {}", CURRENT_SETTINGS_VERSION, fromVersion);
 		}

jadx-gui/src/main/java/jadx/gui/settings/XposedCodegenLanguage.kt

@@ -0,0 +1,6 @@
+package jadx.gui.settings
+
+enum class XposedCodegenLanguage {
+	JAVA,
+	KOTLIN,
+}

jadx-gui/src/main/java/jadx/gui/settings/ui/JadxSettingsWindow.java

@@ -59,6 +59,7 @@
 import jadx.gui.settings.JadxSettings;
 import jadx.gui.settings.JadxSettingsAdapter;
 import jadx.gui.settings.LineNumbersMode;
+import jadx.gui.settings.XposedCodegenLanguage;
 import jadx.gui.settings.ui.cache.CacheSettingsGroup;
 import jadx.gui.settings.ui.plugins.PluginSettings;
 import jadx.gui.settings.ui.shortcut.ShortcutsSettingsGroup;
@@ -622,13 +623,22 @@ private SettingsGroup makeOtherGroup() {
 			needReload();
 		});
 
+		JComboBox<XposedCodegenLanguage> xposedCodegenLanguage =
+				new JComboBox<>(XposedCodegenLanguage.getEntries().toArray(new XposedCodegenLanguage[0]));
+		xposedCodegenLanguage.setSelectedItem(settings.getXposedCodegenLanguage());
+		xposedCodegenLanguage.addActionListener(e -> {
+			settings.setXposedCodegenLanguage((XposedCodegenLanguage) xposedCodegenLanguage.getSelectedItem());
+			mainWindow.loadSettings();
+		});
+
 		SettingsGroup group = new SettingsGroup(NLS.str("preferences.other"));
 		group.addRow(NLS.str("preferences.lineNumbersMode"), lineNumbersMode);
 		group.addRow(NLS.str("preferences.jumpOnDoubleClick"), jumpOnDoubleClick);
 		group.addRow(NLS.str("preferences.useAlternativeFileDialog"), useAltFileDialog);
 		group.addRow(NLS.str("preferences.check_for_updates"), update);
 		group.addRow(NLS.str("preferences.cfg"), cfg);
 		group.addRow(NLS.str("preferences.raw_cfg"), rawCfg);
+		group.addRow(NLS.str("preferences.xposed_codegen_language"), xposedCodegenLanguage);
 		return group;
 	}
 

jadx-gui/src/main/java/jadx/gui/ui/codearea/XposedAction.java

@@ -15,6 +15,7 @@
 import jadx.core.dex.instructions.args.ArgType;
 import jadx.core.dex.nodes.MethodNode;
 import jadx.core.utils.exceptions.JadxRuntimeException;
+import jadx.gui.settings.XposedCodegenLanguage;
 import jadx.gui.treemodel.JClass;
 import jadx.gui.treemodel.JField;
 import jadx.gui.treemodel.JMethod;
@@ -85,16 +86,40 @@ private String generateMethodSnippet(JMethod jMth) {
 			methodName = "\"" + mth.getMethodInfo().getName() + "\", ";
 		}
 		String rawClassName = javaMethod.getDeclaringClass().getRawName();
-		String xposedFormatStr = "XposedHelpers.%s(\"%s\", classLoader, %snew XC_MethodHook() {\n"
-				+ "    @Override\n"
-				+ "    protected void beforeHookedMethod(MethodHookParam param) throws Throwable {\n"
-				+ "        super.beforeHookedMethod(param);\n"
-				+ "    }\n"
-				+ "    @Override\n"
-				+ "    protected void afterHookedMethod(MethodHookParam param) throws Throwable {\n"
-				+ "        super.afterHookedMethod(param);\n"
-				+ "    }\n"
-				+ "});";
+		String javaXposedFormatStr =
+				"XposedHelpers.%s(\"%s\", classLoader, %snew XC_MethodHook() {\n"
+						+ "    @Override\n"
+						+ "    protected void beforeHookedMethod(MethodHookParam param) throws Throwable {\n"
+						+ "        super.beforeHookedMethod(param);\n"
+						+ "    }\n"
+						+ "    @Override\n"
+						+ "    protected void afterHookedMethod(MethodHookParam param) throws Throwable {\n"
+						+ "        super.afterHookedMethod(param);\n"
+						+ "    }\n"
+						+ "});";
+		String kotlinXposedFormatStr =
+				"XposedHelpers.%s(\"%s\", classLoader, %sobject : XC_MethodHook() {\n"
+						+ "    override fun beforeHookedMethod(param: MethodHookParam) {\n"
+						+ "        super.beforeHookedMethod(param)\n"
+						+ "    }\n"
+						+ "\n"
+						+ "    override fun afterHookedMethod(param: MethodHookParam) {\n"
+						+ "        super.afterHookedMethod(param)\n"
+						+ "    }\n"
+						+ "})";
+
+		XposedCodegenLanguage language = getLanguage();
+		String xposedFormatStr;
+		switch (language) {
+			case JAVA:
+				xposedFormatStr = javaXposedFormatStr;
+				break;
+			case KOTLIN:
+				xposedFormatStr = kotlinXposedFormatStr;
+				break;
+			default:
+				throw new JadxRuntimeException("Invalid Xposed code generation language: " + language);
+		}
 
 		List<ArgType> mthArgs = mth.getArgTypes();
 		if (mthArgs.isEmpty()) {
@@ -119,16 +144,58 @@ private String generateClassSnippet(JClass jc) {
 		JavaClass javaClass = jc.getCls();
 		String rawClassName = javaClass.getRawName();
 		String shortClassName = javaClass.getName();
-		return String.format("ClassLoader classLoader = lpparam.classLoader;\n"
-				+ "Class<?> %sClass = classLoader.loadClass(\"%s\");",
-				shortClassName, rawClassName);
+
+		String javaXposedFormatStr =
+				"ClassLoader classLoader = lpparam.classLoader;\n"
+						+ "Class<?> %sClass = classLoader.loadClass(\"%s\");";
+		String kotlinXposedFormatStr =
+				"val classLoader = lpparam.classLoader\n"
+						+ "val %sClass = classLoader.loadClass(\"%s\")";
+
+		XposedCodegenLanguage language = getLanguage();
+		String xposedFormatStr;
+		switch (language) {
+			case JAVA:
+				xposedFormatStr = javaXposedFormatStr;
+				break;
+			case KOTLIN:
+				xposedFormatStr = kotlinXposedFormatStr;
+				break;
+			default:
+				throw new JadxRuntimeException("Invalid Xposed code generation language: " + language);
+		}
+
+		return String.format(xposedFormatStr, shortClassName, rawClassName);
 	}
 
 	private String generateFieldSnippet(JField jf) {
 		JavaField javaField = jf.getJavaField();
 		String isStatic = javaField.getAccessFlags().isStatic() ? "Static" : "";
 		String type = PRIMITIVE_TYPE_MAPPING.getOrDefault(javaField.getFieldNode().getType().toString(), "Object");
 		String xposedMethod = "XposedHelpers.get" + isStatic + type + "Field";
-		return String.format("%s(/*runtimeObject*/, \"%s\");", xposedMethod, javaField.getFieldNode().getFieldInfo().getName());
+
+		String javaXposedFormatStr =
+				"%s(/*runtimeObject*/, \"%s\");";
+		String kotlinXposedFormatStr =
+				"%s(/*runtimeObject*/, \"%s\")";
+
+		XposedCodegenLanguage language = getLanguage();
+		String xposedFormatStr;
+		switch (language) {
+			case JAVA:
+				xposedFormatStr = javaXposedFormatStr;
+				break;
+			case KOTLIN:
+				xposedFormatStr = kotlinXposedFormatStr;
+				break;
+			default:
+				throw new JadxRuntimeException("Invalid Xposed code generation language: " + language);
+		}
+
+		return String.format(xposedFormatStr, xposedMethod, javaField.getFieldNode().getFieldInfo().getName());
+	}
+
+	private XposedCodegenLanguage getLanguage() {
+		return getCodeArea().getMainWindow().getSettings().getXposedCodegenLanguage();
 	}
 }

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Bearbeiten
 preferences.excludedPackages.editDialog=<html>Liste der durch Leerzeichen getrennten Paketnamen, die nicht dekompiliert oder indiziert werden. (spart RAM)<br>z.B. <code>android.support</code></html>
 preferences.cfg=CFG-Grafiken für Methoden generieren (im 'dot'-Format)
 preferences.raw_cfg=RAW CFG-Grafiken generieren
+#preferences.xposed_codegen_language=Xposed code generation language
 #preferences.integerFormat=Integer format
 preferences.font=Schrift ändern
 #preferences.smali_font=

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Edit
 preferences.excludedPackages.editDialog=<html>List of space separated package names that will not be decompiled or indexed (saves RAM)<br>e.g. <code>android.support</code></html>
 preferences.cfg=Generate methods CFG graphs (in 'dot' format)
 preferences.raw_cfg=Generate RAW CFG graphs
+preferences.xposed_codegen_language=Xposed code generation language
 preferences.integerFormat=Integer format
 preferences.font=Editor font
 preferences.smali_font=Monospaced font (Smali/Hex)

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

@@ -203,6 +203,7 @@ preferences.threads=Número de hilos a procesar
 #preferences.excludedPackages.editDialog=
 preferences.cfg=Generar methods CFG graphs (in 'dot' format)
 preferences.raw_cfg=Generate RAW CFG graphs
+#preferences.xposed_codegen_language=Xposed code generation language
 #preferences.integerFormat=Integer format
 preferences.font=Fuente del editor
 #preferences.smali_font=

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Edit
 preferences.excludedPackages.editDialog=<html>Daftar nama paket yang dipisahkan spasi yang tidak akan di deskompilasi atau diindeks (menghemat RAM)<br>contoh: <code>android.support</code></html>
 preferences.cfg=Hasilkan grafik CFG metode (dalam format 'dot')
 preferences.raw_cfg=Hasilkan grafik CFG mentah
+#preferences.xposed_codegen_language=Xposed code generation language
 preferences.integerFormat=Format bilangan bulat
 preferences.font=Font editor
 preferences.smali_font=Font monospasi (Smali/Hex)

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Edit
 preferences.excludedPackages.editDialog=<html>RAM 절약을 위해 디컴파일되거나 인덱싱하지 않을 패키지 이름 목록 (공백으로 항목 구분)<br>예: <code>android.support</code></html>
 preferences.cfg=메소드 CFG 그래프 생성 ('dot' 포맷)
 preferences.raw_cfg=RAW CFG 그래프 생성
+#preferences.xposed_codegen_language=Xposed code generation language
 #preferences.integerFormat=Integer format
 preferences.font=에디터 글씨체
 #preferences.smali_font=

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Editar
 preferences.excludedPackages.editDialog=<html>Lista espaço de pacotes que não vão ser descompilados ou indexados (economiza RAM)<br>ex: <code>android.support</code></html>
 preferences.cfg=Gera gráficos de métodos CFG no formato de pontos ('dot')
 preferences.raw_cfg=Gera gráficos CFG no formato RAW
+#preferences.xposed_codegen_language=Xposed code generation language
 #preferences.integerFormat=Integer format
 preferences.font=Fonte do editor
 #preferences.smali_font=

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=Изменить
 preferences.excludedPackages.editDialog=<html>Список пакетов, которые не будут декомпилироваться и индексироваться (экономит ОЗУ)<br>например: <code>android.support</code><br>Разделитель - одинарный пробел</html>
 preferences.cfg=Методы генерации графиков CFG (в "dot" формате)
 preferences.raw_cfg=Генерировать необработанные графики CFG
+#preferences.xposed_codegen_language=Xposed code generation language
 #preferences.integerFormat=Integer format
 preferences.font=Шрифт редактора Java
 #preferences.smali_font=

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=编辑
 preferences.excludedPackages.editDialog=<html>排除于反编译或索引的以空格分隔的包名列表（节省 RAM）<br>例如<code>android.support</code></html>
 preferences.cfg=生成方法的 CFG 图（'.dot'）
 preferences.raw_cfg=生成原始的 CFG 图
+#preferences.xposed_codegen_language=Xposed code generation language
 preferences.integerFormat=数值格式化
 preferences.font=编辑器字体
 preferences.smali_font=等宽字体 (Smali/Hex)

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

@@ -203,6 +203,7 @@ preferences.excludedPackages.button=編輯
 preferences.excludedPackages.editDialog=<html>排除於索引或反編譯外的套件列表 (以空格分隔) (節省 RAM) <br>例如 <code>android.support</code></html>
 preferences.cfg=產生方法 CFG 圖表 ('dot' 格式)
 preferences.raw_cfg=產生 RAW CFG 圖表
+#preferences.xposed_codegen_language=Xposed code generation language
 preferences.integerFormat=整數模式
 preferences.font=編輯器字型
 preferences.smali_font=等寬字型 (Smali/Hex)