63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
||
|
|
/* 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/. */
|
||
|
|
|
||
|
|
#ifndef mozilla_layers_ScrollInputMethods_h
|
||
|
|
#define mozilla_layers_ScrollInputMethods_h
|
||
|
|
|
||
|
|
namespace mozilla {
|
||
|
|
namespace layers {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* An enumeration that lists various input methods used to trigger scrolling.
|
||
|
|
* Used as the values for the SCROLL_INPUT_METHODS telemetry histogram.
|
||
|
|
*/
|
||
|
|
enum class ScrollInputMethod {
|
||
|
|
|
||
|
|
// === Driven by APZ ===
|
||
|
|
|
||
|
|
ApzTouch, // touch events
|
||
|
|
ApzWheelPixel, // wheel events, pixel scrolling mode
|
||
|
|
ApzWheelLine, // wheel events, line scrolling mode
|
||
|
|
ApzWheelPage, // wheel events, page scrolling mode
|
||
|
|
ApzPanGesture, // pan gesture events (generally triggered by trackpad)
|
||
|
|
ApzScrollbarDrag, // dragging the scrollbar
|
||
|
|
|
||
|
|
// === Driven by the main thread ===
|
||
|
|
|
||
|
|
// Keyboard
|
||
|
|
MainThreadScrollLine, // line scrolling
|
||
|
|
// (generally triggered by up/down arrow keys)
|
||
|
|
MainThreadScrollCharacter, // character scrolling
|
||
|
|
// (generally triggered by left/right arrow keys)
|
||
|
|
MainThreadScrollPage, // page scrolling
|
||
|
|
// (generally triggered by PageUp/PageDown keys)
|
||
|
|
MainThreadCompleteScroll, // scrolling to the end of the scroll range
|
||
|
|
// (generally triggered by Home/End keys)
|
||
|
|
MainThreadScrollCaretIntoView, // scrolling to bring the caret into view
|
||
|
|
// after moving the caret via the keyboard
|
||
|
|
|
||
|
|
// Touch
|
||
|
|
MainThreadTouch, // touch events
|
||
|
|
|
||
|
|
// Scrollbar
|
||
|
|
MainThreadScrollbarDrag, // dragging the scrollbar
|
||
|
|
MainThreadScrollbarButtonClick, // clicking the buttons at the ends of the
|
||
|
|
// scrollback track
|
||
|
|
MainThreadScrollbarTrackClick, // clicking the scrollbar track above or
|
||
|
|
// below the thumb
|
||
|
|
|
||
|
|
// Autoscrolling
|
||
|
|
MainThreadAutoscrolling, // autoscrolling
|
||
|
|
|
||
|
|
// New input methods can be added at the end, up to a maximum of 64.
|
||
|
|
// They should only be added at the end, to preserve the numerical values
|
||
|
|
// of the existing enumerators.
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace layers
|
||
|
|
} // namespace mozilla
|
||
|
|
|
||
|
|
#endif /* mozilla_layers_ScrollInputMethods_h */
|