--- /dev/null
+package swingjs.api;
+
+import java.awt.Component;
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.HashMap;
+import java.util.Properties;
+
+import swingjs.api.js.HTML5Applet;
+
+public interface JSUtilI {
+
+ /**
+ * Indicate to SwingJS that the given file type is binary.
+ *
+ * @param ext
+ */
+ void addBinaryFileType(String ext);
+
+ /**
+ * Indicate to SwingJS that we can load files using AJAX from the given
+ * domain, such as "www.stolaf.edu", because we know that CORS access has been
+ * provided.
+ *
+ * @param domain
+ */
+ void addDirectDatabaseCall(String domain);
+
+ /**
+ * Cache or uncache data under the given path name.
+ *
+ * @param path
+ * @param data
+ * null to remove from the cache
+ */
+ void cachePathData(String path, Object data);
+
+ /**
+ * Get the HTML5 object corresponding to the specified Component, or the
+ * current thread if null.
+ *
+ * @param c
+ * the associated component, or null for the current thread
+ * @return HTML5 applet object
+ */
+ HTML5Applet getAppletForComponent(Component c);
+
+ /**
+ * Get an attribute applet.foo for the applet found using getApplet(null).
+ *
+ * @param key
+ * @return
+ */
+ Object getAppletAttribute(String key);
+
+ /**
+ * Get the code base (swingjs/j2s, probably) for the applet found using
+ * getApplet(null).
+ *
+ * @return
+ */
+ URL getCodeBase();
+
+ /**
+ * Get the document base (wherever the page is) for the applet found using
+ * getApplet(null).
+ *
+ * @return
+ */
+
+ URL getDocumentBase();
+
+ /**
+ * Get an attribute from the div on the page that is associated with this
+ * frame, i.e. with id frame.getName() + "-div".
+ *
+ * @param frame
+ * @param type
+ * "node" or "dim"
+ * @return
+ */
+ Object getEmbeddedAttribute(Component frame, String type);
+
+ /**
+ * Get a file synchronously.
+ *
+ * @param path
+ * @param asString
+ * true for String; false for byte[]
+ * @return byte[] or String
+ */
+ Object getFile(String path, boolean asString);
+
+ /**
+ * Get the 秘bytes field associated with a file, but only if the File object
+ * itself has them attached, not downloading them.
+ *
+ * @param f
+ * @return
+ */
+ byte[] getBytes(File f);
+
+ /**
+ * Retrieve a HashMap consisting of whatever the application wants, but
+ * guaranteed to be unique to this app context, that is, for the applet found
+ * using getApplet(null).
+ *
+ * @param contextKey
+ * @return
+ */
+ HashMap<?, ?> getJSContext(Object contextKey);
+
+ /**
+ * Load a resource -- probably a core file -- if and only if a particular
+ * class has not been instantialized. We use a String here because if we used
+ * a .class object, that reference itself would simply load the class, and we
+ * want the core package to include that as well.
+ *
+ * @param resourcePath
+ * @param className
+ */
+ void loadResourceIfClassUnknown(String resource, String className);
+
+ /**
+ * Read all applet.__Info properties for the applet found using
+ * getApplet(null) that start with the given prefix, such as "jalview_". A
+ * null prefix retrieves all properties. Note that non-string properties will
+ * be stringified.
+ *
+ * @param prefix
+ * an application prefix, or null for all properties
+ * @param p
+ * properties to be appended to
+ */
+ void readInfoProperties(String prefix, Properties p);
+
+ /**
+ * Set an attribute for the applet found using getApplet(null). That is,
+ * applet[key] = val.
+ *
+ * @param key
+ * @param val
+ */
+ void setAppletAttribute(String key, Object val);
+
+ /**
+ * Set an attribute of applet's Info map for the applet found using
+ * getApplet(null). That is, applet.__Info[key] = val.
+ *
+ * @param infoKey
+ * @param val
+ */
+ void setAppletInfo(String infoKey, Object val);
+
+ /**
+ * Set the given File object's 秘bytes field from an InputStream or a byte[]
+ * array. If the file is a JSTempFile, then also cache those bytes.
+ *
+ * @param f
+ * @param isOrBytes
+ * BufferedInputStream, ByteArrayInputStream, FileInputStream, or
+ * byte[]
+ * @return
+ */
+ boolean setFileBytes(File f, Object isOrBytes);
+
+ /**
+ * Same as setFileBytes, but also caches the data if it is a JSTempFile.
+ *
+ * @param is
+ * @param outFile
+ * @return
+ */
+ boolean streamToFile(InputStream is, File outFile);
+
+ /**
+ * Switch the flag in SwingJS to use or not use the JavaScript Map object in
+ * Hashtable, HashMap, and HashSet. Default is enabled.
+ *
+ */
+
+ void setJavaScriptMapObjectEnabled(boolean enabled);
+
+}