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/**
* Copyright (c) 2014, Google Inc.
*
* 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.mail.ui;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.print.PrintAttributes;
import android.print.PrintDocumentAdapter;
import android.print.PrintManager;
import android.support.v4.print.PrintHelper;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import com.android.mail.R;
import java.util.Calendar;
/**
* This fragment shows the Help screen.
*/
public final class HelpFragment extends Fragment {
/** Displays the copyright information, privacy policy or open source licenses. */
private WebView mWebView;
// Public no-args constructor needed for fragment re-instantiation
public HelpFragment() {
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final Uri helpUri = getActivity().getIntent()
.getParcelableExtra(HelpActivity.PARAM_HELP_URL);
mWebView.loadUrl(helpUri.toString());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle state) {
setHasOptionsMenu(true);
final View view = inflater.inflate(R.layout.help_fragment, container, false);
if (view != null) {
mWebView = (WebView) view.findViewById(R.id.webview);
mWebView.setWebViewClient(new WebViewClient());
if (state != null) {
mWebView.restoreState(state);
}
}
return view;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.help_menu, menu);
// if we have no play store URI, hide that menu item
final MenuItem viewAppUrlMenuItem = menu.findItem(R.id.view_app_url);
if (viewAppUrlMenuItem != null) {
final String appUrl = getString(R.string.app_url);
viewAppUrlMenuItem.setVisible(!TextUtils.isEmpty(appUrl));
}
// printing the content of the webview is only allowed if running on Kitkat or later
final MenuItem printItem = menu.findItem(R.id.print_dialog);
if (printItem != null) {
printItem.setVisible(PrintHelper.systemSupportsPrint());
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
final int itemId = item.getItemId();
if (itemId == android.R.id.home) {
final Activity activity = getActivity();
if (activity != null) {
activity.finish();
}
return true;
} else if (itemId == R.id.view_app_url) {
showAppUrl();
return true;
} else if (itemId == R.id.print_dialog) {
print();
return true;
} else if (itemId == R.id.copyright_information) {
showCopyrightInformation();
return true;
} else if (itemId == R.id.open_source_licenses) {
showOpenSourceLicenses();
return true;
} else if (itemId == R.id.privacy_policy) {
showPrivacyPolicy();
return true;
}
return super.onOptionsItemSelected(item);
}
@TargetApi(19)
private void print() {
// pick a name for the print job we will create
final String title = getActivity().getActionBar().getTitle().toString();
final String jobName = getString(R.string.print_job_name, title);
// ask the webview for a print adapter
final PrintDocumentAdapter pda = mWebView.createPrintDocumentAdapter();
// ask the print manager to print the contents of the webview using the job name
final PrintManager pm = (PrintManager) getActivity().
getSystemService(Context.PRINT_SERVICE);
pm.print(jobName, pda, new PrintAttributes.Builder().build());
}
private void showAppUrl() {
final Uri uri = Uri.parse(getString(R.string.app_url));
final Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
private void showCopyrightInformation() {
new CopyrightDialogFragment().show(getFragmentManager(), "copyright");
}
private void showOpenSourceLicenses() {
final Context context = getActivity();
final Intent intent = new Intent(context, LicensesActivity.class);
context.startActivity(intent);
}
private void showPrivacyPolicy() {
final Uri uri = Uri.parse(getString(R.string.privacy_policy_uri));
final Intent i = new Intent(Intent.ACTION_VIEW, uri);
startActivity(i);
}
public static class CopyrightDialogFragment extends DialogFragment {
public CopyrightDialogFragment() {
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// generate and display a copyright statement resembling "© Google 2014"
final int year = Calendar.getInstance().get(Calendar.YEAR);
final String copyright = getString(R.string.copyright, year);
return new AlertDialog.Builder(getActivity())
.setMessage(copyright)
.setNegativeButton(R.string.cancel, null).create();
}
}
}
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