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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 java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Build;
import android.widget.Toast;
import android.preference.*;
/* This module provides a ``preferences'' display for Emacs. It is
supposed to be launched from inside the Settings application to
perform various actions, such as starting Emacs with the ``-Q''
option, which would not be possible otherwise, as there is no
command line on Android.
This file extends a deprecated preferences activity, but no suitable
alternative exists that is identical in appearance to system settings
forms. */
@SuppressWarnings ("deprecation")
public class EmacsPreferencesActivity extends PreferenceActivity
{
/* Restart Emacs with -Q. Call EmacsThread.exit to kill Emacs now,
and tell the system to start EmacsActivity with some parameters
later. */
private void
startEmacsQ ()
{
Intent intent;
intent = new Intent (this, EmacsActivity.class);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
intent.putExtra ("org.gnu.emacs.STARTUP_ARGUMENT", "--quick");
startActivity (intent);
System.exit (0);
}
/* Restart Emacs with `--debug-init'. Call EmacsThread.exit to kill
Emacs now, and tell the system to EmacsActivity with some
parameters later. */
private void
startEmacsDebugInit ()
{
Intent intent;
intent = new Intent (this, EmacsActivity.class);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
intent.putExtra ("org.gnu.emacs.STARTUP_ARGUMENT", "--debug-init");
startActivity (intent);
System.exit (0);
}
/* Erase Emacs's dump file. */
private void
eraseDumpFile ()
{
String wantedDumpFile;
File file;
Toast toast;
wantedDumpFile = ("emacs-" + EmacsNative.getFingerprint ()
+ ".pdmp");
file = new File (getFilesDir (), wantedDumpFile);
if (file.exists ())
file.delete ();
/* Make sure to clear EmacsApplication.dumpFileName, or
starting Emacs without restarting this program will
make Emacs try to load a nonexistent dump file. */
EmacsApplication.dumpFileName = null;
/* Display a message stating that the dump file has been
erased. */
toast = Toast.makeText (this, "Dump file removed",
Toast.LENGTH_SHORT);
toast.show ();
}
@Override
public final void
onCreate (Bundle savedInstanceState)
{
Preference tem;
Preference.OnPreferenceClickListener listener;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
setTheme (android.R.style.Theme_DeviceDefault_Settings);
else if (Build.VERSION.SDK_INT
>= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
setTheme (android.R.style.Theme_DeviceDefault);
/* This must come before using any preference APIs. */
super.onCreate (savedInstanceState);
/* Add preferences from the XML file where they are defined. */
addPreferencesFromResource (R.xml.preferences);
/* Now, set up on click handlers for each of the preferences
items. */
tem = findPreference ("start_quick");
listener = new Preference.OnPreferenceClickListener () {
@Override
public boolean
onPreferenceClick (Preference preference)
{
startEmacsQ ();
return true;
}
};
tem.setOnPreferenceClickListener (listener);
tem = findPreference ("start_debug_init");
listener = new Preference.OnPreferenceClickListener () {
@Override
public boolean
onPreferenceClick (Preference preference)
{
startEmacsDebugInit ();
return true;
}
};
tem.setOnPreferenceClickListener (listener);
tem = findPreference ("erase_dump");
listener = new Preference.OnPreferenceClickListener () {
@Override
public boolean
onPreferenceClick (Preference preference)
{
eraseDumpFile ();
return true;
}
};
tem.setOnPreferenceClickListener (listener);
}
};
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