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Fix NullPointerExceptions for cases when TermuxActivity tries to access TermuxService when it doesn't hold a reference

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Fixes #2026
This commit is contained in:
agnostic-apollo
2021-05-03 00:39:42 +05:00
parent b268b6edf7
commit 42ad3723fd
1 changed files with 35 additions and 13 deletions
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48
app/src/main/java/com/termux/app/terminal/TermuxTerminalSessionClient.java
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@@ -74,7 +74,9 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
@Override
public void onSessionFinished(final TerminalSession finishedSession) {
if (mActivity.getTermuxService().wantsToStop()) {
TermuxService service = mActivity.getTermuxService();
if (service == null || service.wantsToStop()) {
// The service wants to stop as soon as possible.
mActivity.finishActivityIfNotFinishing();
return;
@@ -82,7 +84,7 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
if (mActivity.isVisible() && finishedSession != mActivity.getCurrentSession()) {
// Show toast for non-current sessions that exit.
int indexOfSession = mActivity.getTermuxService().getIndexOfSession(finishedSession);
int indexOfSession = service.getIndexOfSession(finishedSession);
// Verify that session was not removed before we got told about it finishing:
if (indexOfSession >= 0)
mActivity.showToast(toToastTitle(finishedSession) + " - exited", true);
@@ -91,7 +93,7 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
if (mActivity.getPackageManager().hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
// On Android TV devices we need to use older behaviour because we may
// not be able to have multiple launcher icons.
if (mActivity.getTermuxService().getTermuxSessionsSize() > 1) {
if (service.getTermuxSessionsSize() > 1) {
removeFinishedSession(finishedSession);
}
} else {
@@ -161,6 +163,7 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
public void switchToSession(boolean forward) {
TermuxService service = mActivity.getTermuxService();
if (service == null) return;
TerminalSession currentTerminalSession = mActivity.getCurrentSession();
int index = service.getIndexOfSession(currentTerminalSession);
@@ -177,7 +180,10 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
}
public void switchToSession(int index) {
TermuxSession termuxSession = mActivity.getTermuxService().getTermuxSession(index);
TermuxService service = mActivity.getTermuxService();
if (service == null) return;
TermuxSession termuxSession = service.getTermuxSession(index);
if (termuxSession != null)
setCurrentSession(termuxSession.getTerminalSession());
}
@@ -193,7 +199,10 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
}
public void addNewSession(boolean isFailSafe, String sessionName) {
if (mActivity.getTermuxService().getTermuxSessionsSize() >= MAX_SESSIONS) {
TermuxService service = mActivity.getTermuxService();
if (service == null) return;
if (service.getTermuxSessionsSize() >= MAX_SESSIONS) {
new AlertDialog.Builder(mActivity).setTitle(R.string.title_max_terminals_reached).setMessage(R.string.msg_max_terminals_reached)
.setPositiveButton(android.R.string.ok, null).show();
} else {
@@ -206,7 +215,7 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
workingDirectory = currentSession.getCwd();
}
TermuxSession newTermuxSession = mActivity.getTermuxService().createTermuxSession(null, null, null, workingDirectory, isFailSafe, sessionName);
TermuxSession newTermuxSession = service.createTermuxSession(null, null, null, workingDirectory, isFailSafe, sessionName);
if (newTermuxSession == null) return;
TerminalSession newTerminalSession = newTermuxSession.getTerminalSession();
@@ -226,14 +235,17 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
/** The current session as stored or the last one if that does not exist. */
public TerminalSession getCurrentStoredSessionOrLast() {
TerminalSession stored = getCurrentStoredSession(mActivity);
TerminalSession stored = getCurrentStoredSession();
if (stored != null) {
// If a stored session is in the list of currently running sessions, then return it
return stored;
} else {
// Else return the last session currently running
TermuxSession termuxSession = mActivity.getTermuxService().getLastTermuxSession();
TermuxService service = mActivity.getTermuxService();
if (service == null) return null;
TermuxSession termuxSession = service.getLastTermuxSession();
if (termuxSession != null)
return termuxSession.getTerminalSession();
else
@@ -241,7 +253,7 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
}
}
private TerminalSession getCurrentStoredSession(TermuxActivity context) {
private TerminalSession getCurrentStoredSession() {
String sessionHandle = mActivity.getPreferences().getCurrentSession();
// If no session is stored in shared preferences
@@ -249,16 +261,20 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
return null;
// Check if the session handle found matches one of the currently running sessions
return context.getTermuxService().getTerminalSessionForHandle(sessionHandle);
TermuxService service = mActivity.getTermuxService();
if (service == null) return null;
return service.getTerminalSessionForHandle(sessionHandle);
}
public void removeFinishedSession(TerminalSession finishedSession) {
// Return pressed with finished session - remove it.
TermuxService service = mActivity.getTermuxService();
if (service == null) return;
int index = service.removeTermuxSession(finishedSession);
int size = mActivity.getTermuxService().getTermuxSessionsSize();
int size = service.getTermuxSessionsSize();
if (size == 0) {
// There are no sessions to show, so finish the activity.
mActivity.finishActivityIfNotFinishing();
@@ -278,7 +294,10 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
public void checkAndScrollToSession(TerminalSession session) {
if (!mActivity.isVisible()) return;
final int indexOfSession = mActivity.getTermuxService().getIndexOfSession(session);
TermuxService service = mActivity.getTermuxService();
if (service == null) return;
final int indexOfSession = service.getIndexOfSession(session);
if (indexOfSession < 0) return;
final ListView termuxSessionsListView = mActivity.findViewById(R.id.terminal_sessions_list);
if (termuxSessionsListView == null) return;
@@ -290,7 +309,10 @@ public class TermuxTerminalSessionClient extends TermuxTerminalSessionClientBase
String toToastTitle(TerminalSession session) {
final int indexOfSession = mActivity.getTermuxService().getIndexOfSession(session);
TermuxService service = mActivity.getTermuxService();
if (service == null) return null;
final int indexOfSession = service.getIndexOfSession(session);
if (indexOfSession < 0) return null;
StringBuilder toastTitle = new StringBuilder("[" + (indexOfSession + 1) + "]");
if (!TextUtils.isEmpty(session.mSessionName)) {