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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /gfx/layers/apz/src/DragTracker.cpp | |
parent | Initial commit. (diff) | |
download | firefox-upstream/124.0.1.tar.xz firefox-upstream/124.0.1.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/layers/apz/src/DragTracker.cpp')
-rw-r--r-- | gfx/layers/apz/src/DragTracker.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/DragTracker.cpp b/gfx/layers/apz/src/DragTracker.cpp new file mode 100644 index 0000000000..aa3b2a34f7 --- /dev/null +++ b/gfx/layers/apz/src/DragTracker.cpp @@ -0,0 +1,59 @@ +/* -*- 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/. */ + +#include "DragTracker.h" + +#include "InputData.h" +#include "mozilla/Logging.h" + +static mozilla::LazyLogModule sApzDrgLog("apz.drag"); +#define DRAG_LOG(...) MOZ_LOG(sApzDrgLog, LogLevel::Debug, (__VA_ARGS__)) + +namespace mozilla { +namespace layers { + +DragTracker::DragTracker() : mInDrag(false) {} + +/*static*/ +bool DragTracker::StartsDrag(const MouseInput& aInput) { + return aInput.IsLeftButton() && aInput.mType == MouseInput::MOUSE_DOWN; +} + +/*static*/ +bool DragTracker::EndsDrag(const MouseInput& aInput) { + // On Windows, we don't receive a MOUSE_UP at the end of a drag if an + // actual drag session took place. As a backup, we detect the end of the + // drag using the MOUSE_DRAG_END event, which normally is routed directly + // to content, but we're specially routing to APZ for this purpose. Bug + // 1265105 tracks a solution to this at the Windows widget layer; once + // that is implemented, this workaround can be removed. + return (aInput.IsLeftButton() && aInput.mType == MouseInput::MOUSE_UP) || + aInput.mType == MouseInput::MOUSE_DRAG_END; +} + +void DragTracker::Update(const MouseInput& aInput) { + if (StartsDrag(aInput)) { + DRAG_LOG("Starting drag\n"); + mInDrag = true; + } else if (EndsDrag(aInput)) { + DRAG_LOG("Ending drag\n"); + mInDrag = false; + mOnScrollbar = Nothing(); + } +} + +bool DragTracker::InDrag() const { return mInDrag; } + +bool DragTracker::IsOnScrollbar(bool aOnScrollbar) { + if (!mOnScrollbar) { + DRAG_LOG("Setting hitscrollbar %d\n", aOnScrollbar); + mOnScrollbar = Some(aOnScrollbar); + } + return mOnScrollbar.value(); +} + +} // namespace layers +} // namespace mozilla |