From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- gfx/src/CompositorHitTestInfo.h | 113 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 gfx/src/CompositorHitTestInfo.h (limited to 'gfx/src/CompositorHitTestInfo.h') diff --git a/gfx/src/CompositorHitTestInfo.h b/gfx/src/CompositorHitTestInfo.h new file mode 100644 index 0000000000..840d1e5dd5 --- /dev/null +++ b/gfx/src/CompositorHitTestInfo.h @@ -0,0 +1,113 @@ +/* -*- 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/EnumSet.h" +#include "mozilla/EnumTypeTraits.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. +// Each enumerator is annotated with the value it contributes to an +// EnumSet (2 ^ ), in hexadecimal. +enum class CompositorHitTestFlags : uint8_t { + // The frame participates in hit-testing + eVisibleToHitTest = 0, // 0x0001 + + // The frame may have odd shapes that requires the main thread to do accurate + // hit-testing. + eIrregularArea, // 0x0002 + // The frame has APZ-aware listeners and so inputs targeted at this area + // need to be handled by the main thread before APZ can use them, as they + // might be prevent-defaulted. + eApzAwareListeners, // 0x0004 + // This is an inactive scrollframe or unlayerized scrollthumb. In this state + // it cannot be used by APZ for async scrolling, so APZ will defer to the main + // thread. + eInactiveScrollframe, // 0x0008 + + // 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, // 0x0010 + eTouchActionPanYDisabled, // 0x0020 + eTouchActionPinchZoomDisabled, // 0x0040 + eTouchActionAnimatingZoomDisabled, // 0x0080 + + // The frame is a scrollbar or a subframe inside a scrollbar (including + // scroll thumbs) + eScrollbar, // 0x0100 + // 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, // 0x0200 + // If eScrollbar is set, this flag indicates if the scrollbar is a vertical + // one (if set) or a horizontal one (if not set) + eScrollbarVertical, // 0x0400 + + // 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, // 0x0800 + + // Bits 0x1000, 0x2000, 0x4000, and 0x8000 are used by SideBitsPacked in + // WebRenderAPI.cpp when we pack SideBits and CompositorHitTestInfo into a + // uint16_t and pass in into webrender to store in the item tag. + +}; + +using CompositorHitTestInfo = EnumSet; + +// A CompositorHitTestInfo with none of the flags set +constexpr CompositorHitTestInfo CompositorHitTestInvisibleToHit; + +// Mask to check for all the touch-action flags at once +constexpr CompositorHitTestInfo CompositorHitTestTouchActionMask( + CompositorHitTestFlags::eTouchActionPanXDisabled, + CompositorHitTestFlags::eTouchActionPanYDisabled, + CompositorHitTestFlags::eTouchActionPinchZoomDisabled, + CompositorHitTestFlags::eTouchActionAnimatingZoomDisabled); + +// Mask to check all the flags that involve APZ waiting for results from the +// main thread +constexpr CompositorHitTestInfo CompositorHitTestDispatchToContent( + CompositorHitTestFlags::eIrregularArea, + CompositorHitTestFlags::eApzAwareListeners, + CompositorHitTestFlags::eInactiveScrollframe); + +} // namespace gfx + +// Used for IPDL serialization. The 'value' have to be the biggest enum from +// CompositorHitTestFlags. +template <> +struct MaxEnumValue<::mozilla::gfx::CompositorHitTestFlags> { + static constexpr unsigned int value = static_cast( + gfx::CompositorHitTestFlags::eRequiresTargetConfirmation); +}; + +namespace gfx { + +// Checks if the CompositorHitTestFlags max enum value is less than N. +template +static constexpr bool DoesCompositorHitTestInfoFitIntoBits() { + if (MaxEnumValue::value < N) { + return true; + } + + return false; +} +} // namespace gfx + +} // namespace mozilla + +#endif /* MOZILLA_GFX_COMPOSITORHITTESTINFO_H_ */ -- cgit v1.2.3