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/* Communication module for Android terminals. -*- c-file-style: "GNU" -*-
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
package org.gnu.emacs;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.NotificationChannel;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.widget.RemoteViews;
/* Structure designating a single desktop notification.
New versions of Android also organize notifications into individual
``channels'', which are used to implement groups. Unlike on other
systems, notification importance is set for each group, not for
each individual notification. */
public final class EmacsDesktopNotification
{
/* The content of this desktop notification. */
public final String content;
/* The title of this desktop notification. */
public final String title;
/* The notification group. */
public final String group;
/* String identifying this notification for future replacement.
Typically a string resembling ``XXXX.NNNN.YYYY'', where XXXX is
the system boot time, NNNN is the PID of this Emacs instance, and
YYYY is the counter value returned by the notifications display
function. */
public final String tag;
/* The identifier of this notification's icon. */
public final int icon;
/* The importance of this notification's group. */
public final int importance;
public
EmacsDesktopNotification (String title, String content,
String group, String tag, int icon,
int importance)
{
this.content = content;
this.title = title;
this.group = group;
this.tag = tag;
this.icon = icon;
this.importance = importance;
}
/* Functions for displaying desktop notifications. */
/* Internal helper for `display' executed on the main thread. */
@SuppressWarnings ("deprecation") /* Notification.Builder (Context). */
private void
display1 (Context context)
{
NotificationManager manager;
NotificationChannel channel;
Notification notification;
Object tem;
RemoteViews contentView;
Intent intent;
PendingIntent pending;
int priority;
tem = context.getSystemService (Context.NOTIFICATION_SERVICE);
manager = (NotificationManager) tem;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
/* Create the notification channel for this group. If a group
already exists with the same name, its linked attributes
(such as its importance) will be overridden. */
channel = new NotificationChannel (group, group, importance);
manager.createNotificationChannel (channel);
/* Create a notification object and display it. */
notification = (new Notification.Builder (context, group)
.setContentTitle (title)
.setContentText (content)
.setSmallIcon (icon)
.build ());
}
else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
{
/* Android 7.1 and earlier don't segregate notifications into
distinct categories, but permit an importance to be
assigned to each individual notification. */
switch (importance)
{
case 2: /* IMPORTANCE_LOW */
default:
priority = Notification.PRIORITY_LOW;
break;
case 3: /* IMPORTANCE_DEFAULT */
priority = Notification.PRIORITY_DEFAULT;
break;
case 4: /* IMPORTANCE_HIGH */
priority = Notification.PRIORITY_HIGH;
break;
}
notification = (new Notification.Builder (context)
.setContentTitle (title)
.setContentText (content)
.setSmallIcon (icon)
.setPriority (priority)
.build ());
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN)
notification.priority = priority;
}
else
{
notification = new Notification ();
notification.icon = icon;
/* This remote widget tree is defined in
java/res/layout/sdk8_notifications_view.xml. */
notification.contentView
= contentView
= new RemoteViews ("org.gnu.emacs",
R.layout.sdk8_notifications_view);
contentView.setTextViewText (R.id.sdk8_notifications_title,
title);
contentView.setTextViewText (R.id.sdk8_notifications_content,
content);
}
/* Provide a content intent which starts Emacs when the
notification is clicked. */
intent = new Intent (context, EmacsActivity.class);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
pending = PendingIntent.getActivity (context, 0, intent,
PendingIntent.FLAG_IMMUTABLE);
else
pending = PendingIntent.getActivity (context, 0, intent, 0);
notification.contentIntent = pending;
manager.notify (tag, 2, notification);
}
/* Display this desktop notification.
Create a notification channel named GROUP or update its
importance if such a channel is already defined. */
public void
display ()
{
EmacsService.SERVICE.runOnUiThread (new Runnable () {
@Override
public void
run ()
{
display1 (EmacsService.SERVICE);
}
});
}
};
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