Expose certain methods from DroidGap to JavaScript so that a PhoneGap web app can better control program configuration and flow.

framework/src/com/phonegap/App.java

@@ -0,0 +1,135 @@
+/*
+ * PhoneGap is available under *either* the terms of the modified BSD license *or* the
+ * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
+ * 
+ * Copyright (c) 2005-2010, Nitobi Software Inc.
+ * Copyright (c) 2010, IBM Corporation
+ */
+package com.phonegap;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import com.phonegap.api.Plugin;
+import com.phonegap.api.PluginResult;
+
+/**
+ * This class exposes methods in DroidGap that can be called from JavaScript.
+ */
+public class App extends Plugin {
+	
+    /**
+     * Executes the request and returns PluginResult.
+     *
+     * @param action        The action to execute.
+     * @param args          JSONArry of arguments for the plugin.
+     * @param callbackId    The callback id used when calling back into JavaScript.
+     * @return              A PluginResult object with a status and message.
+     */
+    public PluginResult execute(String action, JSONArray args, String callbackId) {
+        PluginResult.Status status = PluginResult.Status.OK;
+        String result = "";
+
+        try {
+        	if (action.equals("clearCache")) {
+        		this.clearCache();
+        	}
+        	else if (action.equals("loadUrl")) {
+            	this.loadUrl(args.getString(0), args.optJSONObject(1));
+            }
+        	else if (action.equals("cancelLoadUrl")) {
+            	this.cancelLoadUrl();
+            }
+        	else if (action.equals("clearHistory")) {
+            	this.clearHistory();
+            }
+        	else if (action.equals("addService")) {
+            	this.addService(args.getString(0), args.getString(1));
+            }
+            return new PluginResult(status, result);
+        } catch (JSONException e) {
+            return new PluginResult(PluginResult.Status.JSON_EXCEPTION);
+        }
+    }
+
+    //--------------------------------------------------------------------------
+    // LOCAL METHODS
+    //--------------------------------------------------------------------------
+
+	/**
+	 * Clear the resource cache.
+	 */
+	public void clearCache() {
+		((DroidGap)this.ctx).clearCache();
+	}
+	
+    /**
+     * Load the url into the webview.
+     * 
+     * @param url
+     * @param props			Properties that can be passed in to the DroidGap activity (i.e. loadingDialog, wait, ...)
+     * @throws JSONException 
+     */
+	public void loadUrl(String url, JSONObject props) throws JSONException {
+		System.out.println("App.loadUrl("+url+","+props+")");
+		int wait = 0;
+		
+		// If there are properties, then set them on the Activity
+		if (props != null) {
+			JSONArray keys = props.names();
+			for (int i=0; i<keys.length(); i++) {
+				String key = keys.getString(i); 
+				if (key.equals("wait")) {
+					wait = props.getInt(key);
+				}
+				else {
+					Object value = props.get(key);
+					if (value == null) {
+						
+					}
+					else if (value.getClass().equals(String.class)) {
+						this.ctx.getIntent().putExtra(key, (String)value);
+					}
+					else if (value.getClass().equals(Boolean.class)) {
+						this.ctx.getIntent().putExtra(key, (Boolean)value);
+					}
+					else if (value.getClass().equals(Integer.class)) {
+						this.ctx.getIntent().putExtra(key, (Integer)value);
+					}
+				}
+			}
+		}
+		
+		// If wait property, then delay loading
+		if (wait > 0) {
+			((DroidGap)this.ctx).loadUrl(url, wait);
+		}
+		else {
+			((DroidGap)this.ctx).loadUrl(url);
+		}
+	}
+
+	/**
+	 * Cancel loadUrl before it has been loaded.
+	 */
+	public void cancelLoadUrl() {
+		((DroidGap)this.ctx).cancelLoadUrl();
+	}
+	
+    /**
+     * Clear web history in this web view.
+     */
+    public void clearHistory() {
+    	((DroidGap)this.ctx).clearHistory();
+    }
+
+    /**
+     * Add a class that implements a service.
+     * 
+     * @param serviceType
+     * @param className
+     */
+    public void addService(String serviceType, String className) {
+    	this.ctx.addService(serviceType, className);
+    }
+}

framework/src/com/phonegap/DroidGap.java

@@ -255,6 +255,7 @@ public class DroidGap extends PhonegapActivity {
 		appView.addJavascriptInterface(this.mKey, "BackButton");
 		appView.addJavascriptInterface(this.callbackServer, "CallbackServer");
 
+		this.addService("App", "com.phonegap.App");
 		this.addService("Geolocation", "com.phonegap.GeoBroker");
 		this.addService("Device", "com.phonegap.Device");
 		this.addService("Accelerometer", "com.phonegap.AccelListener");