Added: Add TermuxShellManager to manage all termux app wide shells

termux-shared/src/main/java/com/termux/shared/termux/shell/TermuxShellManager.java

@@ -0,0 +1,76 @@
+package com.termux.shared.termux.shell;
+
+import android.content.Context;
+import android.content.Intent;
+import android.widget.ArrayAdapter;
+
+import androidx.annotation.NonNull;
+
+import com.termux.shared.shell.command.ExecutionCommand;
+import com.termux.shared.shell.command.runner.app.AppShell;
+import com.termux.shared.termux.settings.preferences.TermuxAppSharedPreferences;
+import com.termux.shared.termux.shell.command.runner.terminal.TermuxSession;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TermuxShellManager {
+
+    private static TermuxShellManager shellManager;
+
+    private static int SHELL_ID = 0;
+
+    protected final Context mContext;
+
+    /**
+     * The foreground TermuxSessions which this service manages.
+     * Note that this list is observed by an activity, like TermuxActivity.mTermuxSessionListViewController,
+     * so any changes must be made on the UI thread and followed by a call to
+     * {@link ArrayAdapter#notifyDataSetChanged()}.
+     */
+    public final List<TermuxSession> mTermuxSessions = new ArrayList<>();
+
+    /**
+     * The background TermuxTasks which this service manages.
+     */
+    public final List<AppShell> mTermuxTasks = new ArrayList<>();
+
+    /**
+     * The pending plugin ExecutionCommands that have yet to be processed by this service.
+     */
+    public final List<ExecutionCommand> mPendingPluginExecutionCommands = new ArrayList<>();
+
+
+
+    public TermuxShellManager(@NonNull Context context) {
+        mContext = context.getApplicationContext();
+    }
+
+    /**
+     * Initialize the {@link #shellManager}.
+     *
+     * @param context The {@link Context} for operations.
+     * @return Returns the {@link TermuxShellManager}.
+     */
+    public static TermuxShellManager init(@NonNull Context context) {
+        if (shellManager == null)
+            shellManager = new TermuxShellManager(context);
+
+        return shellManager;
+    }
+
+    /**
+     * Get the {@link #shellManager}.
+     *
+     * @return Returns the {@link TermuxShellManager}.
+     */
+    public static TermuxShellManager getShellManager() {
+        return shellManager;
+    }
+
+
+    public static synchronized int getNextShellId() {
+        return SHELL_ID++;
+    }
+
+}