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/*
* Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.activity;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import androidx.appcompat.app.ActionBar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.LinearLayout;
import com.wireguard.android.R;
import com.wireguard.android.fragment.TunnelDetailFragment;
import com.wireguard.android.fragment.TunnelEditorFragment;
import com.wireguard.android.model.Tunnel;
/**
* CRUD interface for WireGuard tunnels. This activity serves as the main entry point to the
* WireGuard application, and contains several fragments for listing, viewing details of, and
* editing the configuration and interface state of WireGuard tunnels.
*/
public class MainActivity extends BaseActivity
implements FragmentManager.OnBackStackChangedListener {
@Nullable private ActionBar actionBar;
private boolean isTwoPaneLayout;
@Override
public void onBackPressed() {
final int backStackEntries = getSupportFragmentManager().getBackStackEntryCount();
// If the two-pane layout does not have an editor open, going back should exit the app.
if (isTwoPaneLayout && backStackEntries <= 1) {
finish();
return;
}
// Deselect the current tunnel on navigating back from the detail pane to the one-pane list.
if (!isTwoPaneLayout && backStackEntries == 1) {
setSelectedTunnel(null);
return;
}
super.onBackPressed();
}
@Override public void onBackStackChanged() {
if (actionBar == null)
return;
// Do not show the home menu when the two-pane layout is at the detail view (see above).
final int backStackEntries = getSupportFragmentManager().getBackStackEntryCount();
final int minBackStackEntries = isTwoPaneLayout ? 2 : 1;
actionBar.setDisplayHomeAsUpEnabled(backStackEntries >= minBackStackEntries);
}
// We use onTouchListener here to avoid the UI click sound, hence
// calling View#performClick defeats the purpose of it.
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(@Nullable final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
actionBar = getSupportActionBar();
isTwoPaneLayout = findViewById(R.id.master_detail_wrapper) instanceof LinearLayout;
getSupportFragmentManager().addOnBackStackChangedListener(this);
onBackStackChanged();
}
@Override
public boolean onCreateOptionsMenu(final Menu menu) {
getMenuInflater().inflate(R.menu.main_activity, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// The back arrow in the action bar should act the same as the back button.
onBackPressed();
return true;
case R.id.menu_action_edit:
getSupportFragmentManager().beginTransaction()
.replace(R.id.detail_container, new TunnelEditorFragment())
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
.addToBackStack(null)
.commit();
return true;
case R.id.menu_action_save:
// This menu item is handled by the editor fragment.
return false;
case R.id.menu_settings:
startActivity(new Intent(this, SettingsActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
protected void onSelectedTunnelChanged(@Nullable final Tunnel oldTunnel,
@Nullable final Tunnel newTunnel) {
final FragmentManager fragmentManager = getSupportFragmentManager();
final int backStackEntries = fragmentManager.getBackStackEntryCount();
if (newTunnel == null) {
// Clear everything off the back stack (all editors and detail fragments).
fragmentManager.popBackStackImmediate(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
return;
}
if (backStackEntries == 2) {
// Pop the editor off the back stack to reveal the detail fragment. Use the immediate
// method to avoid the editor picking up the new tunnel while it is still visible.
fragmentManager.popBackStackImmediate();
} else if (backStackEntries == 0) {
// Create and show a new detail fragment.
fragmentManager.beginTransaction()
.add(R.id.detail_container, new TunnelDetailFragment())
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
.addToBackStack(null)
.commit();
}
}
}
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