chromium/src/third_party/blink/public/mojom/screen_enumeration/screen_enumeration.mojom

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module blink.mojom;

import "ui/display/mojom/display.mojom";

// A struct containing information about the set of connected displays.
struct Displays {
  array<display.mojom.Display> displays;   // The list of connected displays.
  int64 internal_id;  // The internal display id or kInvalidDisplayId if none.
  int64 primary_id;   // The primary display id or kInvalidDisplayId if none.
};

// An enum representing the presence of multiple displays, or an error state.
enum MultipleDisplays {
  kFalse,  // 0 or 1 displays are connected.
  kTrue,   // 2 or more displays are connected.
  kError,  // The display count is unavailable or access is denied.
};

// An interface enabling renderers to request information about screens
// connected to the device from the browser process.
interface ScreenEnumeration {
  // Returns information about the connected displays, or null if an error
  // occurred (e.g. display information is unavailable or access is denied).
  GetDisplays() => (Displays? result);

  // Returns information about the presence of multiple displays.
  HasMultipleDisplays() => (MultipleDisplays result);
};