/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_GFX_COMPOSITORHITTESTINFO_H_
#define MOZILLA_GFX_COMPOSITORHITTESTINFO_H_
#include "mozilla/TypedEnumBits.h"
namespace mozilla {
namespace gfx {
// This set of flags is used to figure out what information a frame has
// that is relevant to hit-testing in the compositor. The flags are
// intentionally set up so that if all of them are 0 the item is effectively
// invisible to hit-testing, and no information for this frame needs to be
// sent to the compositor.
enum class CompositorHitTestInfo : uint16_t {
// Shortcut for checking that none of the flags are set
eInvisibleToHitTest = 0,
// The frame participates in hit-testing
eVisibleToHitTest = 1 << 0,
// The frame requires main-thread handling for events
eDispatchToContent = 1 << 1,
// The touch action flags are set up so that the default of
// touch-action:auto on an element leaves all the flags as 0.
eTouchActionPanXDisabled = 1 << 2,
eTouchActionPanYDisabled = 1 << 3,
eTouchActionPinchZoomDisabled = 1 << 4,
eTouchActionDoubleTapZoomDisabled = 1 << 5,
// Mask to check for all the touch-action flags at once
eTouchActionMask = (1 << 2) | (1 << 3) | (1 << 4) | (1 << 5),
// The frame is a scrollbar or a subframe inside a scrollbar (including
// scroll thumbs)
eScrollbar = 1 << 6,
// The frame is a scrollthumb. If this is set then eScrollbar will also be
// set, unless gecko somehow generates a scroll thumb without a containing
// scrollbar.
eScrollbarThumb = 1 << 7,
// If eScrollbar is set, this flag indicates if the scrollbar is a vertical
// one (if set) or a horizontal one (if not set)
eScrollbarVertical = 1 << 8,
// Events targeting this frame should only be processed if a target
// confirmation is received from the main thread. If no such confirmation
// is received within a timeout period, the event may be dropped.
// Only meaningful in combination with eDispatchToContent.
eRequiresTargetConfirmation = 1 << 9,
// Used for IPDL serialization. This bitmask should include all the bits
// that are defined in the enum.
ALL_BITS = (1 << 10) - 1,
};
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(CompositorHitTestInfo)
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_COMPOSITORHITTESTINFO_H_ */