gui: don't decode resources on file open

jadx-core/src/main/java/jadx/core/xmlgen/ResContainer.java

@@ -51,7 +51,7 @@ public class ResContainer implements Comparable<ResContainer> {
 			try {
 				decoder.decode(content, os);
 			} catch (Exception e) {
-				LOG.error("Failed to decode 9-patch png image", e);
+				LOG.error("Failed to decode 9-patch png image, path: {}", name, e);
 			}
 			newContent = new ByteArrayInputStream(os.toByteArray());
 		}

jadx-gui/src/main/java/jadx/gui/treemodel/JClass.java

@@ -12,7 +12,7 @@ import jadx.core.dex.info.AccessInfo;
 import jadx.gui.utils.NLS;
 import jadx.gui.utils.Utils;
 
-public class JClass extends JNode {
+public class JClass extends JLoadableNode {
 	private static final long serialVersionUID = -1239986875244097177L;
 
 	private static final ImageIcon ICON_CLASS = Utils.openIcon("class_obj");
@@ -43,6 +43,11 @@ public class JClass extends JNode {
 		return cls;
 	}
 
+	@Override
+	public void loadNode() {
+		getRootClass().load();
+	}
+
 	public synchronized void load() {
 		if (!loaded) {
 			cls.decompile();

jadx-gui/src/main/java/jadx/gui/treemodel/JLoadableNode.java

+package jadx.gui.treemodel;
+
+public abstract class JLoadableNode extends JNode {
+	public abstract void loadNode();
+}

jadx-gui/src/main/java/jadx/gui/treemodel/JResource.java

@@ -6,16 +6,20 @@ import java.util.List;
 import java.util.Map;
 
 import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
+import org.jetbrains.annotations.NotNull;
 
 import jadx.api.ResourceFile;
 import jadx.api.ResourceFileContent;
 import jadx.api.ResourceType;
 import jadx.core.codegen.CodeWriter;
 import jadx.core.xmlgen.ResContainer;
+import jadx.gui.utils.NLS;
 import jadx.gui.utils.OverlayIcon;
 import jadx.gui.utils.Utils;
 
-public class JResource extends JNode implements Comparable<JResource> {
+import static jadx.api.ResourceFileContent.createResourceFileContentInstance;
+
+public class JResource extends JLoadableNode implements Comparable<JResource> {
 	private static final long serialVersionUID = -201018424302612434L;
 
 	private static final ImageIcon ROOT_ICON = Utils.openIcon("cf_obj");
@@ -50,22 +54,35 @@ public class JResource extends JNode implements Comparable<JResource> {
 		this.name = name;
 		this.shortName = shortName;
 		this.type = type;
+		this.loaded = false;
 	}
 
 	public final void update() {
-		loadContent();
 		removeAllChildren();
+		if (!loaded) {
+			if (type == JResType.DIR
+					|| type == JResType.ROOT
+					|| resFile.getType() == ResourceType.ARSC) {
+				add(new TextNode(NLS.str("tree.loading")));
+			}
+		} else {
+			loadContent();
 			for (JResource res : files) {
 				res.update();
 				add(res);
 			}
 		}
+	}
+
+	@Override
+	public void loadNode() {
+		loadContent();
+		loaded = true;
+		update();
+	}
 
 	private void loadContent() {
 		getContent();
-		for (JResource res : files) {
-			res.loadContent();
-		}
 	}
 
 	@Override
@@ -101,8 +118,8 @@ public class JResource extends JNode implements Comparable<JResource> {
 				String resName = rc.getName();
 				String[] path = resName.split("/");
 				String resShortName = path.length == 0 ? resName : path[path.length - 1];
-				ResourceFileContent fileContent = ResourceFileContent.createResourceFileContentInstance(resShortName, ResourceType.XML, cw);
-				if(fileContent != null) {
+				ResourceFileContent fileContent = createResourceFileContentInstance(resShortName, ResourceType.XML, cw);
+				if (fileContent != null) {
 					addPath(path, root, new JResource(fileContent, resName, resShortName, JResType.FILE));
 				}
 			}
@@ -242,7 +259,7 @@ public class JResource extends JNode implements Comparable<JResource> {
 	}
 
 	@Override
-	public int compareTo(JResource o) {
+	public int compareTo(@NotNull JResource o) {
 		return name.compareTo(o.name);
 	}
 
@@ -266,5 +283,4 @@ public class JResource extends JNode implements Comparable<JResource> {
 	public int hashCode() {
 		return name.hashCode();
 	}
-
 }

jadx-gui/src/main/java/jadx/gui/treemodel/JRoot.java

@@ -10,6 +10,7 @@ import java.util.regex.Pattern;
 import jadx.api.ResourceFile;
 import jadx.gui.JadxWrapper;
 import jadx.gui.treemodel.JResource.JResType;
+import jadx.gui.utils.NLS;
 import jadx.gui.utils.Utils;
 
 public class JRoot extends JNode {
@@ -41,7 +42,7 @@ public class JRoot extends JNode {
 		if (resources.isEmpty()) {
 			return Collections.emptyList();
 		}
-		JResource root = new JResource(null, "Resources", JResType.ROOT);
+		JResource root = new JResource(null, NLS.str("tree.resources_title"), JResType.ROOT);
 		String splitPathStr = Pattern.quote(File.separator);
 		for (ResourceFile rf : resources) {
 			String rfName;

jadx-gui/src/main/java/jadx/gui/treemodel/JSources.java

@@ -12,6 +12,7 @@ import java.util.Set;
 
 import jadx.api.JavaPackage;
 import jadx.gui.JadxWrapper;
+import jadx.gui.utils.NLS;
 import jadx.gui.utils.Utils;
 
 public class JSources extends JNode {
@@ -132,6 +133,6 @@ public class JSources extends JNode {
 
 	@Override
 	public String makeString() {
-		return "Source code";
+		return NLS.str("tree.sources_title");
 	}
 }

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

@@ -41,6 +41,7 @@ import jadx.gui.jobs.IndexJob;
 import jadx.gui.settings.JadxSettings;
 import jadx.gui.settings.JadxSettingsWindow;
 import jadx.gui.treemodel.JClass;
+import jadx.gui.treemodel.JLoadableNode;
 import jadx.gui.treemodel.JNode;
 import jadx.gui.treemodel.JResource;
 import jadx.gui.treemodel.JRoot;
@@ -581,9 +582,8 @@ public class MainWindow extends JFrame {
 			public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException {
 				TreePath path = event.getPath();
 				Object node = path.getLastPathComponent();
-				if (node instanceof JClass) {
-					JClass cls = (JClass) node;
-					cls.getRootClass().load();
+				if (node instanceof JLoadableNode) {
+					((JLoadableNode) node).loadNode();
 				}
 			}
 

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

@@ -23,6 +23,8 @@ file.save_all_msg=Select directory for save decompiled sources
 file.select=Select
 file.exit=Exit
 
+tree.sources_title=Source code
+tree.resources_title=Resources
 tree.loading=Loading...
 
 search=Search