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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/. */
#include "mozilla/layers/APZPublicUtils.h"
#include "AsyncPanZoomController.h"
#include "mozilla/HelperMacros.h"
#include "mozilla/StaticPrefs_general.h"
namespace mozilla {
namespace layers {
namespace apz {
/*static*/ void InitializeGlobalState() {
MOZ_ASSERT(NS_IsMainThread());
AsyncPanZoomController::InitializeGlobalState();
}
/*static*/ const ScreenMargin CalculatePendingDisplayPort(
const FrameMetrics& aFrameMetrics, const ParentLayerPoint& aVelocity) {
return AsyncPanZoomController::CalculatePendingDisplayPort(
aFrameMetrics, aVelocity, AsyncPanZoomController::ZoomInProgress::No);
}
/*static*/ gfx::IntSize GetDisplayportAlignmentMultiplier(
const ScreenSize& aBaseSize) {
return AsyncPanZoomController::GetDisplayportAlignmentMultiplier(aBaseSize);
}
ScrollAnimationBezierPhysicsSettings ComputeBezierAnimationSettingsForOrigin(
ScrollOrigin aOrigin) {
int32_t minMS = 0;
int32_t maxMS = 0;
bool isOriginSmoothnessEnabled = false;
#define READ_DURATIONS(prefbase) \
isOriginSmoothnessEnabled = StaticPrefs::general_smoothScroll() && \
StaticPrefs::general_smoothScroll_##prefbase(); \
if (isOriginSmoothnessEnabled) { \
minMS = StaticPrefs::general_smoothScroll_##prefbase##_durationMinMS(); \
maxMS = StaticPrefs::general_smoothScroll_##prefbase##_durationMaxMS(); \
}
switch (aOrigin) {
case ScrollOrigin::Pixels:
READ_DURATIONS(pixels)
break;
case ScrollOrigin::Lines:
READ_DURATIONS(lines)
break;
case ScrollOrigin::Pages:
READ_DURATIONS(pages)
break;
case ScrollOrigin::MouseWheel:
READ_DURATIONS(mouseWheel)
break;
case ScrollOrigin::Scrollbars:
READ_DURATIONS(scrollbars)
break;
default:
READ_DURATIONS(other)
break;
}
#undef READ_DURATIONS
if (isOriginSmoothnessEnabled) {
static const int32_t kSmoothScrollMaxAllowedAnimationDurationMS = 10000;
maxMS = clamped(maxMS, 0, kSmoothScrollMaxAllowedAnimationDurationMS);
minMS = clamped(minMS, 0, maxMS);
}
// Keep the animation duration longer than the average event intervals
// (to "connect" consecutive scroll animations before the scroll comes to a
// stop).
double intervalRatio =
((double)StaticPrefs::general_smoothScroll_durationToIntervalRatio()) /
100.0;
// Duration should be at least as long as the intervals -> ratio is at least 1
intervalRatio = std::max(1.0, intervalRatio);
return ScrollAnimationBezierPhysicsSettings{minMS, maxMS, intervalRatio};
}
ScrollMode GetScrollModeForOrigin(ScrollOrigin origin) {
if (!StaticPrefs::general_smoothScroll()) return ScrollMode::Instant;
switch (origin) {
case ScrollOrigin::Lines:
return StaticPrefs::general_smoothScroll_lines() ? ScrollMode::Smooth
: ScrollMode::Instant;
case ScrollOrigin::Pages:
return StaticPrefs::general_smoothScroll_pages() ? ScrollMode::Smooth
: ScrollMode::Instant;
case ScrollOrigin::Other:
return StaticPrefs::general_smoothScroll_other() ? ScrollMode::Smooth
: ScrollMode::Instant;
default:
MOZ_ASSERT(false, "Unknown keyboard scroll origin");
return StaticPrefs::general_smoothScroll() ? ScrollMode::Smooth
: ScrollMode::Instant;
}
}
} // namespace apz
} // namespace layers
} // namespace mozilla
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