feat: allow to include/exclude dependencies when saving with class fi…

…lter (#1466)(PR #1467)

* feat: Add option to include/exclude dependencies when saving
* fix save skip for class depencencies

Co-authored-by: Skylot <skylot@gmail.com>

jadx-core/src/main/java/jadx/api/JadxArgs.java

@@ -55,6 +55,11 @@ public class JadxArgs {
 	 */
 	private Predicate<String> classFilter = null;
 
+	/**
+	 * Save dependencies for classes accepted by {@code classFilter}
+	 */
+	private boolean includeDependencies = false;
+
 	private boolean deobfuscationOn = false;
 	private boolean useSourceNameAsClassAlias = false;
 	private boolean parseKotlinMetadata = false;
@@ -261,6 +266,14 @@ public void setSkipSources(boolean skipSources) {
 		this.skipSources = skipSources;
 	}
 
+	public void setIncludeDependencies(boolean includeDependencies) {
+		this.includeDependencies = includeDependencies;
+	}
+
+	public boolean isIncludeDependencies() {
+		return includeDependencies;
+	}
+
 	public Predicate<String> getClassFilter() {
 		return classFilter;
 	}
@@ -513,6 +526,7 @@ public String toString() {
 				+ ", useImports=" + useImports
 				+ ", skipResources=" + skipResources
 				+ ", skipSources=" + skipSources
+				+ ", includeDependencies=" + includeDependencies
 				+ ", deobfuscationOn=" + deobfuscationOn
 				+ ", deobfuscationMapFile=" + deobfuscationMapFile
 				+ ", deobfuscationMapFileMode=" + deobfuscationMapFileMode

jadx-core/src/main/java/jadx/api/JadxDecompiler.java

@@ -331,10 +331,14 @@ private void appendSourcesSave(List<Runnable> tasks, File outDir) {
 		List<JavaClass> classes = getClasses();
 		List<JavaClass> processQueue = new ArrayList<>(classes.size());
 		for (JavaClass cls : classes) {
-			if (cls.getClassNode().contains(AFlag.DONT_GENERATE)) {
+			ClassNode clsNode = cls.getClassNode();
+			if (clsNode.contains(AFlag.DONT_GENERATE)) {
 				continue;
 			}
-			if (classFilter != null && !classFilter.test(cls.getFullName())) {
+			if (classFilter != null && !classFilter.test(clsNode.getClassInfo().getFullName())) {
+				if (!args.isIncludeDependencies()) {
+					clsNode.add(AFlag.DONT_GENERATE);
+				}
 				continue;
 			}
 			processQueue.add(cls);

jadx-core/src/main/java/jadx/core/ProcessClass.java

@@ -99,6 +99,10 @@ public ICodeInfo generateCode(ClassNode cls) {
 			return generateCode(topParentClass);
 		}
 		try {
+			if (cls.contains(AFlag.DONT_GENERATE)) {
+				process(cls, false);
+				return ICodeInfo.EMPTY;
+			}
 			for (ClassNode depCls : cls.getDependencies()) {
 				process(depCls, false);
 			}