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/*
* Copyright (C) 2021 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.imsserviceentitlement;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnAttachStateChangeListener;
import android.view.ViewGroup;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import androidx.fragment.app.Fragment;
import java.util.concurrent.Executor;
/** A fragment of WebView to render WFC T&C and emergency address web portal */
public class WfcWebPortalFragment extends Fragment {
private static final String TAG = "IMSSE-WfcWebPortalFragment";
private static final String KEY_URL_STRING = "url";
private static final String KEY_POST_DATA_STRING = "post_data";
// Javascript object associated with the webview callback functions. See TS.43 v5.0 section 3.4
private static final String JS_CONTROLLER_NAME = "VoWiFiWebServiceFlow";
private static final String URL_WITH_PDF_FILE_EXTENSION = ".pdf";
private WebView mWebView;
private boolean mFinishFlow = false;
/** Public static constructor */
public static WfcWebPortalFragment newInstance(String url, String postData) {
WfcWebPortalFragment frag = new WfcWebPortalFragment();
Bundle args = new Bundle();
args.putString(KEY_URL_STRING, url);
args.putString(KEY_POST_DATA_STRING, postData);
frag.setArguments(args);
return frag;
}
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_webview, container, false);
Bundle arguments = getArguments();
Log.d(TAG, "Webview arguments: " + arguments);
String url = arguments.getString(KEY_URL_STRING, "");
String postData = arguments.getString(KEY_POST_DATA_STRING, "");
ProgressBar spinner = v.findViewById(R.id.loadingbar);
mWebView = v.findViewById(R.id.webview);
mWebView.setWebViewClient(
new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false; // Let WebView handle redirected URL
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
spinner.setVisibility(View.VISIBLE);
}
@Override
public void onPageFinished(WebView view, String url) {
spinner.setVisibility(View.GONE);
super.onPageFinished(view, url);
}
});
mWebView.addOnAttachStateChangeListener(
new OnAttachStateChangeListener() {
@Override
public void onViewAttachedToWindow(View v) {
if (!v.hasFocus()) {
v.requestFocus();
}
}
@Override
public void onViewDetachedFromWindow(View v) {
Log.d(TAG, "#onViewDetachedFromWindow");
if (!mFinishFlow) {
((WfcActivationUi) getActivity()).setResultAndFinish(
Activity.RESULT_CANCELED);
}
}
});
mWebView.addJavascriptInterface(new JsInterface(getActivity()), JS_CONTROLLER_NAME);
WebSettings settings = mWebView.getSettings();
settings.setDomStorageEnabled(true);
settings.setJavaScriptEnabled(true);
if (TextUtils.isEmpty(postData)) {
mWebView.loadUrl(url);
} else {
mWebView.postUrl(url, postData.getBytes());
}
return v;
}
/**
* To support webview handle back key to go back previous page.
*
* @return {@code true} let activity not do anything for this key down.
* {@code false} activity should handle key down.
*/
public boolean onKeyDown(int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_BACK && keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
if (mWebView != null
&& mWebView.canGoBack()
&& mWebView.getUrl().toLowerCase().endsWith(URL_WITH_PDF_FILE_EXTENSION)) {
mWebView.goBack();
return true;
}
}
return false;
}
/** Emergency address websheet javascript callback. */
private class JsInterface {
private final WfcActivationUi mUi;
private final Executor mMainExecutor;
JsInterface(Activity activity) {
mUi = (WfcActivationUi) activity;
mMainExecutor = activity.getMainExecutor();
}
/**
* Callback function when the VoWiFi service flow ends properly between the device and the
* VoWiFi portal web server.
*/
@JavascriptInterface
public void entitlementChanged() {
Log.d(TAG, "#entitlementChanged");
mFinishFlow = true;
mMainExecutor.execute(() -> mUi.getController().finishFlow());
}
/**
* Callback function when the VoWiFi service flow ends prematurely, either by user
* action or due to a web sheet or network error.
*/
@JavascriptInterface
public void dismissFlow() {
Log.d(TAG, "#dismissFlow");
mUi.setResultAndFinish(Activity.RESULT_CANCELED);
}
}
}
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