core/input/InputDeviceCapabilities.idl

// Copyright 2015 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.

// Represents capabilities for a group of related input devices.
// To ease implementation, developers cannot rely on comparing two 
// InputDeviceCapabilities instances for equality. Now we only have two
// InputDeviceCapabilities instances: one for devices which send touch
// events, and one for those that don't, because currently all we care
// about is if the input device fires touch events or not.

[
    Constructor(optional InputDeviceCapabilitiesInit deviceInitDict),
    RuntimeEnabled=InputDeviceCapabilities,
    GarbageCollected,
] interface InputDeviceCapabilities {
    
    // Whether this device dispatches touch events for movement.  This is used to detect
    // mouse events which represent only an action that has already been handled  by
    // touch event handlers.
    [Measure] readonly attribute boolean firesTouchEvents;
};