1 files changed, 140 insertions, 0 deletions
diff --git a/src/com/android/browser/NetworkStateHandler.java b/src/com/android/browser/NetworkStateHandler.java
new file mode 100644
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+++ b/src/com/android/browser/NetworkStateHandler.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.browser;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.webkit.WebView;
+
+/**
+ * Handle network state changes
+ */
+public class NetworkStateHandler {
+
+    Activity mActivity;
+    Controller mController;
+
+    // monitor platform changes
+    private IntentFilter mNetworkStateChangedFilter;
+    private BroadcastReceiver mNetworkStateIntentReceiver;
+    private boolean mIsNetworkUp;
+
+    /* hold a ref so we can auto-cancel if necessary */
+    private AlertDialog mAlertDialog;
+
+    public NetworkStateHandler(Activity activity, Controller controller) {
+        mActivity = activity;
+        mController = controller;
+        // Find out if the network is currently up.
+        ConnectivityManager cm = (ConnectivityManager) mActivity
+                .getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo info = cm.getActiveNetworkInfo();
+        if (info != null) {
+            mIsNetworkUp = info.isAvailable();
+        }
+
+        /*
+         * enables registration for changes in network status from http stack
+         */
+        mNetworkStateChangedFilter = new IntentFilter();
+        mNetworkStateChangedFilter.addAction(
+                ConnectivityManager.CONNECTIVITY_ACTION);
+        mNetworkStateIntentReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                if (intent.getAction().equals(
+                        ConnectivityManager.CONNECTIVITY_ACTION)) {
+
+                    NetworkInfo info = intent.getParcelableExtra(
+                            ConnectivityManager.EXTRA_NETWORK_INFO);
+                    String typeName = info.getTypeName();
+                    String subtypeName = info.getSubtypeName();
+                    sendNetworkType(typeName.toLowerCase(),
+                            (subtypeName != null ? subtypeName.toLowerCase() : ""));
+
+                    onNetworkToggle(info.isAvailable());
+                }
+            }
+        };
+
+    }
+
+    void onPause() {
+        // unregister network state listener
+        mActivity.unregisterReceiver(mNetworkStateIntentReceiver);
+    }
+
+    void onResume() {
+        mActivity.registerReceiver(mNetworkStateIntentReceiver,
+                mNetworkStateChangedFilter);
+    }
+
+    /**
+     * connectivity manager says net has come or gone... inform the user
+     * @param up true if net has come up, false if net has gone down
+     */
+    void onNetworkToggle(boolean up) {
+        if (up == mIsNetworkUp) {
+            return;
+        } else if (up) {
+            mIsNetworkUp = true;
+            if (mAlertDialog != null) {
+                mAlertDialog.cancel();
+                mAlertDialog = null;
+            }
+        } else {
+            mIsNetworkUp = false;
+            if (mController.isInLoad()) {
+                createAndShowNetworkDialog();
+           }
+        }
+        WebView w = mController.getCurrentWebView();
+        if (w != null) {
+            w.setNetworkAvailable(up);
+        }
+    }
+
+    boolean isNetworkUp() {
+        return mIsNetworkUp;
+    }
+
+    // This method shows the network dialog alerting the user that the net is
+    // down. It will only show the dialog if mAlertDialog is null.
+    void createAndShowNetworkDialog() {
+        if (mAlertDialog == null) {
+            mAlertDialog = new AlertDialog.Builder(mActivity)
+                    .setTitle(R.string.loadSuspendedTitle)
+                    .setMessage(R.string.loadSuspended)
+                    .setPositiveButton(R.string.ok, null)
+                    .show();
+        }
+    }
+
+    private void sendNetworkType(String type, String subtype) {
+        WebView w = mController.getCurrentWebView();
+        if (w != null) {
+            w.setNetworkType(type, subtype);
+        }
+    }
+
+}