ExternalDisplayManager.java

/*
   External Display Manager
 
   Copyright 2026 Ibrahim Sevinc <ibrahim.sevinc.mail@gmail.com>
 
   This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
   If a copy of the MPL was not distributed with this file, You can obtain one at
   http://mozilla.org/MPL/2.0/.
*/
 
package com.freerdp.freerdpcore.presentation;
 
import android.app.Activity;
import android.app.ActivityOptions;
import android.content.Intent;
import android.hardware.display.DisplayManager;
import android.view.Display;
 
import androidx.appcompat.app.AlertDialog;
 
import com.freerdp.freerdpcore.R;
 
class ExternalDisplayManager
{
  private final Activity activity;
  private final DisplayManager displayManager;
 
  ExternalDisplayManager(Activity activity)
  {
    this.activity = activity;
    this.displayManager = (DisplayManager)activity.getSystemService(Activity.DISPLAY_SERVICE);
  }
 
  void launchSessionWithDisplayPicker(String refStr)
  {
    Display[] secondary = getSecondaryDisplays();
    if (secondary.length == 0)
    {
      launchSessionOnDisplay(refStr, Display.DEFAULT_DISPLAY);
      return;
    }
 
    String[] labels = new String[1 + secondary.length];
    labels[0] = activity.getString(R.string.display_main_screen);
    for (int i = 0; i < secondary.length; i++)
      labels[i + 1] = secondary[i].getName();
 
    new AlertDialog.Builder(activity)
        .setTitle(R.string.select_display_title)
        .setItems(labels,
                  (d, which) -> {
                    int id = (which == 0) ? Display.DEFAULT_DISPLAY
                                          : secondary[which - 1].getDisplayId();
                    launchSessionOnDisplay(refStr, id);
                  })
        .show();
  }
 
  private void launchSessionOnDisplay(String refStr, int displayId)
  {
    Intent intent = new Intent(activity, SessionActivity.class);
    intent.putExtra(SessionActivity.PARAM_CONNECTION_REFERENCE, refStr);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
    ActivityOptions opts = ActivityOptions.makeBasic();
    opts.setLaunchDisplayId(displayId);
    activity.startActivity(intent, opts.toBundle());
  }
 
  private Display[] getSecondaryDisplays()
  {
    return displayManager.getDisplays(DisplayManager.DISPLAY_CATEGORY_PRESENTATION);
  }
}