feat(plugins): add method to get jadx-gui icons by name

jadx-core/src/main/java/jadx/api/plugins/gui/JadxGuiContext.java

@@ -3,6 +3,7 @@ package jadx.api.plugins.gui;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
+import javax.swing.ImageIcon;
 import javax.swing.JFrame;
 import javax.swing.KeyStroke;
 
@@ -57,6 +58,16 @@ public interface JadxGuiContext {
 	 */
 	JFrame getMainFrame();
 
+	/**
+	 * Load SVG icon from jadx resources.
+	 * All available icons can be found in "jadx-gui/src/main/resources/icons".
+	 * Method is thread-safe.
+	 *
+	 * @param name short name in form: "category/iconName", example: "nodes/publicClass"
+	 * @return loaded and cached icon, if icon not found returns default icon: "ui/error"
+	 */
+	ImageIcon getSVGIcon(String name);
+
 	ICodeNodeRef getNodeUnderCaret();
 
 	ICodeNodeRef getNodeUnderMouse();

jadx-gui/src/main/java/jadx/gui/plugins/context/GuiPluginContext.java

@@ -4,6 +4,7 @@ import java.awt.Container;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
+import javax.swing.ImageIcon;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.KeyStroke;
@@ -31,6 +32,7 @@ import jadx.gui.ui.codearea.AbstractCodeArea;
 import jadx.gui.ui.codearea.AbstractCodeContentPanel;
 import jadx.gui.ui.codearea.CodeArea;
 import jadx.gui.ui.panel.ContentPanel;
+import jadx.gui.utils.IconsCache;
 import jadx.gui.utils.JNodeCache;
 import jadx.gui.utils.UiUtils;
 
@@ -121,6 +123,16 @@ public class GuiPluginContext implements JadxGuiContext {
 		return null;
 	}
 
+	@Override
+	public ImageIcon getSVGIcon(String name) {
+		try {
+			return IconsCache.getSVGIcon(name);
+		} catch (Exception e) {
+			LOG.error("Failed to load icon: {}", name, e);
+			return IconsCache.getSVGIcon("ui/error");
+		}
+	}
+
 	@Override
 	public ICodeNodeRef getNodeUnderCaret() {
 		CodeArea codeArea = getCodeArea();

jadx-gui/src/main/java/jadx/gui/utils/IconsCache.java

@@ -0,0 +1,15 @@
+package jadx.gui.utils;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import com.formdev.flatlaf.extras.FlatSVGIcon;
+
+public class IconsCache {
+
+	private static final Map<String, FlatSVGIcon> SVG_ICONS = new ConcurrentHashMap<>();
+
+	public static FlatSVGIcon getSVGIcon(String name) {
+		return SVG_ICONS.computeIfAbsent(name, UiUtils::openSvgIcon);
+	}
+}