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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/layers/apz/src/AndroidFlingPhysics.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.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/AndroidFlingPhysics.h')
-rw-r--r--gfx/layers/apz/src/AndroidFlingPhysics.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/AndroidFlingPhysics.h b/gfx/layers/apz/src/AndroidFlingPhysics.h
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+/* -*- 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_layers_AndroidFlingPhysics_h_
+#define mozilla_layers_AndroidFlingPhysics_h_
+
+#include "AsyncPanZoomController.h"
+#include "Units.h"
+#include "mozilla/Assertions.h"
+
+namespace mozilla {
+namespace layers {
+
+class AndroidFlingPhysics {
+ public:
+ void Init(const ParentLayerPoint& aVelocity, float aPLPPI);
+ void Sample(const TimeDuration& aDelta, ParentLayerPoint* aOutVelocity,
+ ParentLayerPoint* aOutOffset);
+
+ static void InitializeGlobalState();
+
+ private:
+ // Returns false if the animation should end.
+ bool SampleImpl(const TimeDuration& aDelta, float* aOutVelocity);
+
+ // Information pertaining to the current fling.
+ // This is initialized on each call to Init().
+ ParentLayerCoord mVelocity; // diagonal velocity (length of velocity vector)
+ TimeDuration mTargetDuration;
+ TimeDuration mDurationSoFar;
+ ParentLayerPoint mLastPos;
+ ParentLayerPoint mCurrentPos;
+ ParentLayerCoord mTargetDistance; // diagonal distance
+ ParentLayerPoint mTargetPos; // really a target *offset* relative to the
+ // start position, which we don't track
+ ParentLayerPoint mDeltaNorm; // mTargetPos with length normalized to 1
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_AndroidFlingPhysics_h_