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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/AsyncPanZoomAnimation.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/AsyncPanZoomAnimation.h')
-rw-r--r--gfx/layers/apz/src/AsyncPanZoomAnimation.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/AsyncPanZoomAnimation.h b/gfx/layers/apz/src/AsyncPanZoomAnimation.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_AsyncPanZoomAnimation_h_
+#define mozilla_layers_AsyncPanZoomAnimation_h_
+
+#include "APZUtils.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/TimeStamp.h"
+#include "nsISupportsImpl.h"
+#include "nsTArray.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+namespace layers {
+
+struct FrameMetrics;
+
+class WheelScrollAnimation;
+class OverscrollAnimation;
+class SmoothMsdScrollAnimation;
+class SmoothScrollAnimation;
+
+class AsyncPanZoomAnimation {
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AsyncPanZoomAnimation)
+
+ public:
+ explicit AsyncPanZoomAnimation() = default;
+
+ virtual bool DoSample(FrameMetrics& aFrameMetrics,
+ const TimeDuration& aDelta) = 0;
+
+ /**
+ * Attempt to handle a main-thread scroll offset update without cancelling
+ * the animation. This may or may not make sense depending on the type of
+ * the animation and whether the scroll update is relative or absolute.
+ *
+ * If the scroll update is relative, |aRelativeDelta| will contain the
+ * delta of the relative update. If the scroll update is absolute,
+ * |aRelativeDelta| will be Nothing() (the animation can check the APZC's
+ * FrameMetrics for the new absolute scroll offset if it wants to handle
+ * and absolute update).
+ *
+ * Returns whether the animation could handle the scroll update. If the
+ * return value is false, the animation will be cancelled.
+ */
+ virtual bool HandleScrollOffsetUpdate(const Maybe<CSSPoint>& aRelativeDelta) {
+ return false;
+ }
+
+ bool Sample(FrameMetrics& aFrameMetrics, const TimeDuration& aDelta) {
+ // In some situations, particularly when handoff is involved, it's possible
+ // for |aDelta| to be negative on the first call to sample. Ignore such a
+ // sample here, to avoid each derived class having to deal with this case.
+ if (aDelta.ToMilliseconds() <= 0) {
+ return true;
+ }
+
+ return DoSample(aFrameMetrics, aDelta);
+ }
+
+ /**
+ * Get the deferred tasks in |mDeferredTasks| and place them in |aTasks|. See
+ * |mDeferredTasks| for more information. Clears |mDeferredTasks|.
+ */
+ nsTArray<RefPtr<Runnable>> TakeDeferredTasks() {
+ return std::move(mDeferredTasks);
+ }
+
+ virtual WheelScrollAnimation* AsWheelScrollAnimation() { return nullptr; }
+ virtual SmoothMsdScrollAnimation* AsSmoothMsdScrollAnimation() {
+ return nullptr;
+ }
+ virtual SmoothScrollAnimation* AsSmoothScrollAnimation() { return nullptr; }
+ virtual OverscrollAnimation* AsOverscrollAnimation() { return nullptr; }
+
+ virtual bool WantsRepaints() { return true; }
+
+ virtual void Cancel(CancelAnimationFlags aFlags) {}
+
+ virtual bool WasTriggeredByScript() const { return false; }
+
+ protected:
+ // Protected destructor, to discourage deletion outside of Release():
+ virtual ~AsyncPanZoomAnimation() = default;
+
+ /**
+ * Tasks scheduled for execution after the APZC's mMonitor is released.
+ * Derived classes can add tasks here in Sample(), and the APZC can call
+ * ExecuteDeferredTasks() to execute them.
+ */
+ nsTArray<RefPtr<Runnable>> mDeferredTasks;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_AsyncPanZoomAnimation_h_