ScrollAnimatorMac.mm [plain text]
/*
* Copyright (C) 2010, 2011, 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(SMOOTH_SCROLLING)
#include "ScrollAnimatorMac.h"
#include "FloatPoint.h"
#include "GraphicsLayer.h"
#include "Logging.h"
#include "NSScrollerImpDetails.h"
#include "NSScrollerImpSPI.h"
#include "PlatformWheelEvent.h"
#include "ScrollView.h"
#include "ScrollableArea.h"
#include "ScrollbarTheme.h"
#include "ScrollbarThemeMac.h"
#include "TextStream.h"
#include "WebCoreSystemInterface.h"
#include <wtf/BlockObjCExceptions.h>
using namespace WebCore;
static ScrollbarThemeMac* macScrollbarTheme()
{
ScrollbarTheme& scrollbarTheme = ScrollbarTheme::theme();
return !scrollbarTheme.isMockTheme() ? static_cast<ScrollbarThemeMac*>(&scrollbarTheme) : nullptr;
}
static NSScrollerImp *scrollerImpForScrollbar(Scrollbar& scrollbar)
{
if (ScrollbarThemeMac* scrollbarTheme = macScrollbarTheme())
return scrollbarTheme->painterForScrollbar(scrollbar);
return nil;
}
@interface NSObject (ScrollAnimationHelperDetails)
- (id)initWithDelegate:(id)delegate;
- (void)_stopRun;
- (BOOL)_isAnimating;
- (NSPoint)targetOrigin;
- (CGFloat)_progress;
@end
@interface WebScrollAnimationHelperDelegate : NSObject
{
WebCore::ScrollAnimatorMac* _animator;
}
- (id)initWithScrollAnimator:(WebCore::ScrollAnimatorMac*)scrollAnimator;
@end
static NSSize abs(NSSize size)
{
NSSize finalSize = size;
if (finalSize.width < 0)
finalSize.width = -finalSize.width;
if (finalSize.height < 0)
finalSize.height = -finalSize.height;
return finalSize;
}
@implementation WebScrollAnimationHelperDelegate
- (id)initWithScrollAnimator:(WebCore::ScrollAnimatorMac*)scrollAnimator
{
self = [super init];
if (!self)
return nil;
_animator = scrollAnimator;
return self;
}
- (void)invalidate
{
_animator = 0;
}
- (NSRect)bounds
{
if (!_animator)
return NSZeroRect;
WebCore::FloatPoint currentPosition = _animator->currentPosition();
return NSMakeRect(currentPosition.x(), currentPosition.y(), 0, 0);
}
- (void)_immediateScrollToPoint:(NSPoint)newPosition
{
if (!_animator)
return;
_animator->immediateScrollToPositionForScrollAnimation(newPosition);
}
- (NSPoint)_pixelAlignProposedScrollPosition:(NSPoint)newOrigin
{
return newOrigin;
}
- (NSSize)convertSizeToBase:(NSSize)size
{
return abs(size);
}
- (NSSize)convertSizeFromBase:(NSSize)size
{
return abs(size);
}
- (NSSize)convertSizeToBacking:(NSSize)size
{
return abs(size);
}
- (NSSize)convertSizeFromBacking:(NSSize)size
{
return abs(size);
}
- (id)superview
{
return nil;
}
- (id)documentView
{
return nil;
}
- (id)window
{
return nil;
}
- (void)_recursiveRecomputeToolTips
{
}
@end
@interface WebScrollerImpPairDelegate : NSObject <NSScrollerImpPairDelegate>
{
ScrollableArea* _scrollableArea;
}
- (id)initWithScrollableArea:(ScrollableArea*)scrollableArea;
@end
@implementation WebScrollerImpPairDelegate
- (id)initWithScrollableArea:(ScrollableArea*)scrollableArea
{
self = [super init];
if (!self)
return nil;
_scrollableArea = scrollableArea;
return self;
}
- (void)invalidate
{
_scrollableArea = 0;
}
- (NSRect)contentAreaRectForScrollerImpPair:(NSScrollerImpPair *)scrollerImpPair
{
UNUSED_PARAM(scrollerImpPair);
if (!_scrollableArea)
return NSZeroRect;
WebCore::IntSize contentsSize = _scrollableArea->contentsSize();
return NSMakeRect(0, 0, contentsSize.width(), contentsSize.height());
}
- (BOOL)inLiveResizeForScrollerImpPair:(NSScrollerImpPair *)scrollerImpPair
{
UNUSED_PARAM(scrollerImpPair);
if (!_scrollableArea)
return NO;
return _scrollableArea->inLiveResize();
}
- (NSPoint)mouseLocationInContentAreaForScrollerImpPair:(NSScrollerImpPair *)scrollerImpPair
{
UNUSED_PARAM(scrollerImpPair);
if (!_scrollableArea)
return NSZeroPoint;
return _scrollableArea->lastKnownMousePosition();
}
- (NSPoint)scrollerImpPair:(NSScrollerImpPair *)scrollerImpPair convertContentPoint:(NSPoint)pointInContentArea toScrollerImp:(NSScrollerImp *)scrollerImp
{
UNUSED_PARAM(scrollerImpPair);
if (!_scrollableArea || !scrollerImp)
return NSZeroPoint;
WebCore::Scrollbar* scrollbar = 0;
if ([scrollerImp isHorizontal])
scrollbar = _scrollableArea->horizontalScrollbar();
else
scrollbar = _scrollableArea->verticalScrollbar();
// It is possible to have a null scrollbar here since it is possible for this delegate
// method to be called between the moment when a scrollbar has been set to 0 and the
// moment when its destructor has been called. We should probably de-couple some
// of the clean-up work in ScrollbarThemeMac::unregisterScrollbar() to avoid this
// issue.
if (!scrollbar)
return NSZeroPoint;
ASSERT(scrollerImp == scrollerImpForScrollbar(*scrollbar));
return scrollbar->convertFromContainingView(WebCore::IntPoint(pointInContentArea));
}
- (void)scrollerImpPair:(NSScrollerImpPair *)scrollerImpPair setContentAreaNeedsDisplayInRect:(NSRect)rect
{
UNUSED_PARAM(scrollerImpPair);
UNUSED_PARAM(rect);
if (!_scrollableArea)
return;
if ([scrollerImpPair overlayScrollerStateIsLocked])
return;
_scrollableArea->scrollAnimator().contentAreaWillPaint();
}
- (void)scrollerImpPair:(NSScrollerImpPair *)scrollerImpPair updateScrollerStyleForNewRecommendedScrollerStyle:(NSScrollerStyle)newRecommendedScrollerStyle
{
if (!_scrollableArea)
return;
[scrollerImpPair setScrollerStyle:newRecommendedScrollerStyle];
static_cast<ScrollAnimatorMac&>(_scrollableArea->scrollAnimator()).updateScrollerStyle();
}
@end
enum FeatureToAnimate {
ThumbAlpha,
TrackAlpha,
UIStateTransition,
ExpansionTransition
};
@interface WebScrollbarPartAnimation : NSAnimation
{
Scrollbar* _scrollbar;
RetainPtr<NSScrollerImp> _scrollerImp;
FeatureToAnimate _featureToAnimate;
CGFloat _startValue;
CGFloat _endValue;
}
- (id)initWithScrollbar:(Scrollbar*)scrollbar featureToAnimate:(FeatureToAnimate)featureToAnimate animateFrom:(CGFloat)startValue animateTo:(CGFloat)endValue duration:(NSTimeInterval)duration;
@end
@implementation WebScrollbarPartAnimation
- (id)initWithScrollbar:(Scrollbar*)scrollbar featureToAnimate:(FeatureToAnimate)featureToAnimate animateFrom:(CGFloat)startValue animateTo:(CGFloat)endValue duration:(NSTimeInterval)duration
{
self = [super initWithDuration:duration animationCurve:NSAnimationEaseInOut];
if (!self)
return nil;
_scrollbar = scrollbar;
_featureToAnimate = featureToAnimate;
_startValue = startValue;
_endValue = endValue;
[self setAnimationBlockingMode:NSAnimationNonblocking];
return self;
}
- (void)startAnimation
{
ASSERT(_scrollbar);
_scrollerImp = scrollerImpForScrollbar(*_scrollbar);
[super startAnimation];
}
- (void)setStartValue:(CGFloat)startValue
{
_startValue = startValue;
}
- (void)setEndValue:(CGFloat)endValue
{
_endValue = endValue;
}
- (void)setCurrentProgress:(NSAnimationProgress)progress
{
[super setCurrentProgress:progress];
ASSERT(_scrollbar);
CGFloat currentValue;
if (_startValue > _endValue)
currentValue = 1 - progress;
else
currentValue = progress;
switch (_featureToAnimate) {
case ThumbAlpha:
[_scrollerImp setKnobAlpha:currentValue];
break;
case TrackAlpha:
[_scrollerImp setTrackAlpha:currentValue];
break;
case UIStateTransition:
[_scrollerImp setUiStateTransitionProgress:currentValue];
break;
case ExpansionTransition:
[_scrollerImp setExpansionTransitionProgress:currentValue];
break;
}
if (!_scrollbar->supportsUpdateOnSecondaryThread())
_scrollbar->invalidate();
}
- (void)invalidate
{
BEGIN_BLOCK_OBJC_EXCEPTIONS;
[self stopAnimation];
END_BLOCK_OBJC_EXCEPTIONS;
_scrollbar = 0;
}
@end
@interface WebScrollerImpDelegate : NSObject<NSAnimationDelegate, NSScrollerImpDelegate>
{
WebCore::Scrollbar* _scrollbar;
RetainPtr<WebScrollbarPartAnimation> _knobAlphaAnimation;
RetainPtr<WebScrollbarPartAnimation> _trackAlphaAnimation;
RetainPtr<WebScrollbarPartAnimation> _uiStateTransitionAnimation;
RetainPtr<WebScrollbarPartAnimation> _expansionTransitionAnimation;
}
- (id)initWithScrollbar:(WebCore::Scrollbar*)scrollbar;
- (void)cancelAnimations;
@end
@implementation WebScrollerImpDelegate
- (id)initWithScrollbar:(WebCore::Scrollbar*)scrollbar
{
self = [super init];
if (!self)
return nil;
_scrollbar = scrollbar;
return self;
}
- (void)cancelAnimations
{
BEGIN_BLOCK_OBJC_EXCEPTIONS;
[_knobAlphaAnimation stopAnimation];
[_trackAlphaAnimation stopAnimation];
[_uiStateTransitionAnimation stopAnimation];
[_expansionTransitionAnimation stopAnimation];
END_BLOCK_OBJC_EXCEPTIONS;
}
- (ScrollAnimatorMac*)scrollAnimator
{
return &static_cast<ScrollAnimatorMac&>(_scrollbar->scrollableArea().scrollAnimator());
}
- (NSRect)convertRectToBacking:(NSRect)aRect
{
return aRect;
}
- (NSRect)convertRectFromBacking:(NSRect)aRect
{
return aRect;
}
- (CALayer *)layer
{
if (!_scrollbar)
return nil;
if (!ScrollbarThemeMac::isCurrentlyDrawingIntoLayer())
return nil;
GraphicsLayer* layer;
if (_scrollbar->orientation() == VerticalScrollbar)
layer = _scrollbar->scrollableArea().layerForVerticalScrollbar();
else
layer = _scrollbar->scrollableArea().layerForHorizontalScrollbar();
static CALayer *dummyLayer = [[CALayer alloc] init];
return layer ? layer->platformLayer() : dummyLayer;
}
- (NSPoint)mouseLocationInScrollerForScrollerImp:(NSScrollerImp *)scrollerImp
{
if (!_scrollbar)
return NSZeroPoint;
ASSERT_UNUSED(scrollerImp, scrollerImp == scrollerImpForScrollbar(*_scrollbar));
return _scrollbar->convertFromContainingView(_scrollbar->scrollableArea().lastKnownMousePosition());
}
- (NSRect)convertRectToLayer:(NSRect)rect
{
return rect;
}
- (BOOL)shouldUseLayerPerPartForScrollerImp:(NSScrollerImp *)scrollerImp
{
UNUSED_PARAM(scrollerImp);
if (!_scrollbar)
return false;
return _scrollbar->supportsUpdateOnSecondaryThread();
}
- (void)setUpAlphaAnimation:(RetainPtr<WebScrollbarPartAnimation>&)scrollbarPartAnimation scrollerPainter:(NSScrollerImp *)scrollerPainter part:(WebCore::ScrollbarPart)part animateAlphaTo:(CGFloat)newAlpha duration:(NSTimeInterval)duration
{
// If the user has scrolled the page, then the scrollbars must be animated here.
// This overrides the early returns.
bool mustAnimate = [self scrollAnimator]->haveScrolledSincePageLoad();
if ([self scrollAnimator]->scrollbarPaintTimerIsActive() && !mustAnimate)
return;
if (_scrollbar->scrollableArea().shouldSuspendScrollAnimations() && !mustAnimate) {
[self scrollAnimator]->startScrollbarPaintTimer();
return;
}
// At this point, we are definitely going to animate now, so stop the timer.
[self scrollAnimator]->stopScrollbarPaintTimer();
// If we are currently animating, stop
if (scrollbarPartAnimation) {
[scrollbarPartAnimation stopAnimation];
scrollbarPartAnimation = nil;
}
if (ScrollbarThemeMac* macTheme = macScrollbarTheme())
macTheme->setPaintCharacteristicsForScrollbar(*_scrollbar);
if (part == WebCore::ThumbPart && _scrollbar->orientation() == VerticalScrollbar) {
if (newAlpha == 1) {
IntRect thumbRect = IntRect([scrollerPainter rectForPart:NSScrollerKnob]);
[self scrollAnimator]->setVisibleScrollerThumbRect(thumbRect);
} else
[self scrollAnimator]->setVisibleScrollerThumbRect(IntRect());
}
scrollbarPartAnimation = adoptNS([[WebScrollbarPartAnimation alloc] initWithScrollbar:_scrollbar
featureToAnimate:part == ThumbPart ? ThumbAlpha : TrackAlpha
animateFrom:part == ThumbPart ? [scrollerPainter knobAlpha] : [scrollerPainter trackAlpha]
animateTo:newAlpha
duration:duration]);
[scrollbarPartAnimation startAnimation];
}
- (void)scrollerImp:(NSScrollerImp *)scrollerImp animateKnobAlphaTo:(CGFloat)newKnobAlpha duration:(NSTimeInterval)duration
{
if (!_scrollbar)
return;
ASSERT(scrollerImp == scrollerImpForScrollbar(*_scrollbar));
NSScrollerImp *scrollerPainter = (NSScrollerImp *)scrollerImp;
if (![self scrollAnimator]->scrollbarsCanBeActive()) {
[scrollerImp setKnobAlpha:0];
_scrollbar->invalidate();
return;
}
// If we are fading the scrollbar away, that is a good indication that we are no longer going to
// be moving it around on the scrolling thread. Calling [scrollerPainter setUsePresentationValue:NO]
// will pass that information on to the NSScrollerImp API.
if (newKnobAlpha == 0 && _scrollbar->supportsUpdateOnSecondaryThread())
[scrollerPainter setUsePresentationValue:NO];
[self setUpAlphaAnimation:_knobAlphaAnimation scrollerPainter:scrollerPainter part:WebCore::ThumbPart animateAlphaTo:newKnobAlpha duration:duration];
}
- (void)scrollerImp:(NSScrollerImp *)scrollerImp animateTrackAlphaTo:(CGFloat)newTrackAlpha duration:(NSTimeInterval)duration
{
if (!_scrollbar)
return;
ASSERT(scrollerImp == scrollerImpForScrollbar(*_scrollbar));
NSScrollerImp *scrollerPainter = (NSScrollerImp *)scrollerImp;
[self setUpAlphaAnimation:_trackAlphaAnimation scrollerPainter:scrollerPainter part:WebCore::BackTrackPart animateAlphaTo:newTrackAlpha duration:duration];
}
- (void)scrollerImp:(NSScrollerImp *)scrollerImp animateUIStateTransitionWithDuration:(NSTimeInterval)duration
{
if (!_scrollbar)
return;
ASSERT(scrollerImp == scrollerImpForScrollbar(*_scrollbar));
// UIStateTransition always animates to 1. In case an animation is in progress this avoids a hard transition.
[scrollerImp setUiStateTransitionProgress:1 - [scrollerImp uiStateTransitionProgress]];
// If the UI state transition is happening, then we are no longer moving the scrollbar on the scrolling thread.
if (_scrollbar->supportsUpdateOnSecondaryThread())
[scrollerImp setUsePresentationValue:NO];
if (!_uiStateTransitionAnimation)
_uiStateTransitionAnimation = adoptNS([[WebScrollbarPartAnimation alloc] initWithScrollbar:_scrollbar
featureToAnimate:UIStateTransition
animateFrom:[scrollerImp uiStateTransitionProgress]
animateTo:1.0
duration:duration]);
else {
// If we don't need to initialize the animation, just reset the values in case they have changed.
[_uiStateTransitionAnimation setStartValue:[scrollerImp uiStateTransitionProgress]];
[_uiStateTransitionAnimation setEndValue:1.0];
[_uiStateTransitionAnimation setDuration:duration];
}
[_uiStateTransitionAnimation startAnimation];
}
- (void)scrollerImp:(NSScrollerImp *)scrollerImp animateExpansionTransitionWithDuration:(NSTimeInterval)duration
{
if (!_scrollbar)
return;
ASSERT(scrollerImp == scrollerImpForScrollbar(*_scrollbar));
// ExpansionTransition always animates to 1. In case an animation is in progress this avoids a hard transition.
[scrollerImp setExpansionTransitionProgress:1 - [scrollerImp expansionTransitionProgress]];
if (!_expansionTransitionAnimation) {
_expansionTransitionAnimation = adoptNS([[WebScrollbarPartAnimation alloc] initWithScrollbar:_scrollbar
featureToAnimate:ExpansionTransition
animateFrom:[scrollerImp expansionTransitionProgress]
animateTo:1.0
duration:duration]);
} else {
// If we don't need to initialize the animation, just reset the values in case they have changed.
[_expansionTransitionAnimation setStartValue:[scrollerImp uiStateTransitionProgress]];
[_expansionTransitionAnimation setEndValue:1.0];
[_expansionTransitionAnimation setDuration:duration];
}
[_expansionTransitionAnimation startAnimation];
}
- (void)scrollerImp:(NSScrollerImp *)scrollerImp overlayScrollerStateChangedTo:(NSOverlayScrollerState)newOverlayScrollerState
{
UNUSED_PARAM(scrollerImp);
UNUSED_PARAM(newOverlayScrollerState);
}
- (void)invalidate
{
_scrollbar = 0;
BEGIN_BLOCK_OBJC_EXCEPTIONS;
[_knobAlphaAnimation invalidate];
[_trackAlphaAnimation invalidate];
[_uiStateTransitionAnimation invalidate];
[_expansionTransitionAnimation invalidate];
END_BLOCK_OBJC_EXCEPTIONS;
}
@end
namespace WebCore {
std::unique_ptr<ScrollAnimator> ScrollAnimator::create(ScrollableArea& scrollableArea)
{
return std::make_unique<ScrollAnimatorMac>(scrollableArea);
}
ScrollAnimatorMac::ScrollAnimatorMac(ScrollableArea& scrollableArea)
: ScrollAnimator(scrollableArea)
, m_initialScrollbarPaintTimer(*this, &ScrollAnimatorMac::initialScrollbarPaintTimerFired)
, m_sendContentAreaScrolledTimer(*this, &ScrollAnimatorMac::sendContentAreaScrolledTimerFired)
, m_haveScrolledSincePageLoad(false)
, m_needsScrollerStyleUpdate(false)
{
m_scrollAnimationHelperDelegate = adoptNS([[WebScrollAnimationHelperDelegate alloc] initWithScrollAnimator:this]);
m_scrollAnimationHelper = adoptNS([[NSClassFromString(@"NSScrollAnimationHelper") alloc] initWithDelegate:m_scrollAnimationHelperDelegate.get()]);
m_scrollerImpPairDelegate = adoptNS([[WebScrollerImpPairDelegate alloc] initWithScrollableArea:&scrollableArea]);
m_scrollerImpPair = adoptNS([[NSScrollerImpPair alloc] init]);
[m_scrollerImpPair setDelegate:m_scrollerImpPairDelegate.get()];
[m_scrollerImpPair setScrollerStyle:recommendedScrollerStyle()];
}
ScrollAnimatorMac::~ScrollAnimatorMac()
{
BEGIN_BLOCK_OBJC_EXCEPTIONS;
[m_scrollerImpPairDelegate invalidate];
[m_scrollerImpPair setDelegate:nil];
[m_horizontalScrollerImpDelegate invalidate];
[m_verticalScrollerImpDelegate invalidate];
[m_scrollAnimationHelperDelegate invalidate];
END_BLOCK_OBJC_EXCEPTIONS;
}
static bool scrollAnimationEnabledForSystem()
{
NSString* scrollAnimationDefaultsKey = @"NSScrollAnimationEnabled";
static bool enabled = [[NSUserDefaults standardUserDefaults] boolForKey:scrollAnimationDefaultsKey];
return enabled;
}
#if ENABLE(RUBBER_BANDING)
static bool rubberBandingEnabledForSystem()
{
static bool initialized = false;
static bool enabled = true;
// Caches the result, which is consistent with other apps like the Finder, which all
// require a restart after changing this default.
if (!initialized) {
// Uses -objectForKey: and not -boolForKey: in order to default to true if the value wasn't set.
id value = [[NSUserDefaults standardUserDefaults] objectForKey:@"NSScrollViewRubberbanding"];
if ([value isKindOfClass:[NSNumber class]])
enabled = [value boolValue];
initialized = true;
}
return enabled;
}
#endif
bool ScrollAnimatorMac::scroll(ScrollbarOrientation orientation, ScrollGranularity granularity, float step, float multiplier)
{
m_haveScrolledSincePageLoad = true;
if (!scrollAnimationEnabledForSystem() || !m_scrollableArea.scrollAnimatorEnabled())
return ScrollAnimator::scroll(orientation, granularity, step, multiplier);
if (granularity == ScrollByPixel)
return ScrollAnimator::scroll(orientation, granularity, step, multiplier);
FloatPoint currentPosition = this->currentPosition();
FloatSize delta;
if (orientation == HorizontalScrollbar)
delta.setWidth(step * multiplier);
else
delta.setHeight(step * multiplier);
FloatPoint newPosition = FloatPoint(currentPosition + delta).constrainedBetween(m_scrollableArea.minimumScrollPosition(), m_scrollableArea.maximumScrollPosition());
if (currentPosition == newPosition)
return false;
if ([m_scrollAnimationHelper _isAnimating]) {
NSPoint targetOrigin = [m_scrollAnimationHelper targetOrigin];
if (orientation == HorizontalScrollbar)
newPosition.setY(targetOrigin.y);
else
newPosition.setX(targetOrigin.x);
}
LOG_WITH_STREAM(Scrolling, stream << "ScrollAnimatorMac::scroll " << " from " << currentPosition << " to " << newPosition);
[m_scrollAnimationHelper scrollToPoint:newPosition];
return true;
}
// FIXME: Maybe this should take a position.
void ScrollAnimatorMac::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
{
[m_scrollAnimationHelper _stopRun];
immediateScrollToPosition(ScrollableArea::scrollPositionFromOffset(offset, toFloatSize(m_scrollableArea.scrollOrigin())));
}
FloatPoint ScrollAnimatorMac::adjustScrollPositionIfNecessary(const FloatPoint& position) const
{
if (!m_scrollableArea.constrainsScrollingToContentEdge())
return position;
return m_scrollableArea.constrainScrollPosition(ScrollPosition(position));
}
void ScrollAnimatorMac::adjustScrollPositionToBoundsIfNecessary()
{
bool currentlyConstrainsToContentEdge = m_scrollableArea.constrainsScrollingToContentEdge();
m_scrollableArea.setConstrainsScrollingToContentEdge(true);
ScrollPosition currentScrollPosition = m_scrollableArea.scrollPosition();
ScrollPosition constainedPosition = m_scrollableArea.constrainScrollPosition(currentScrollPosition);
immediateScrollBy(constainedPosition - currentScrollPosition);
m_scrollableArea.setConstrainsScrollingToContentEdge(currentlyConstrainsToContentEdge);
}
void ScrollAnimatorMac::immediateScrollToPosition(const FloatPoint& newPosition)
{
FloatPoint currentPosition = this->currentPosition();
FloatPoint adjustedPosition = adjustScrollPositionIfNecessary(newPosition);
bool positionChanged = adjustedPosition != currentPosition;
if (!positionChanged && !scrollableArea().scrollOriginChanged())
return;
FloatSize delta = adjustedPosition - currentPosition;
m_currentPosition = adjustedPosition;
notifyPositionChanged(delta);
updateActiveScrollSnapIndexForOffset();
}
bool ScrollAnimatorMac::isRubberBandInProgress() const
{
#if !ENABLE(RUBBER_BANDING)
return false;
#else
return m_scrollController.isRubberBandInProgress();
#endif
}
bool ScrollAnimatorMac::isScrollSnapInProgress() const
{
#if ENABLE(CSS_SCROLL_SNAP)
return m_scrollController.isScrollSnapInProgress();
#else
return false;
#endif
}
void ScrollAnimatorMac::immediateScrollToPositionForScrollAnimation(const FloatPoint& newPosition)
{
ASSERT(m_scrollAnimationHelper);
immediateScrollToPosition(newPosition);
}
void ScrollAnimatorMac::notifyPositionChanged(const FloatSize& delta)
{
notifyContentAreaScrolled(delta);
ScrollAnimator::notifyPositionChanged(delta);
}
void ScrollAnimatorMac::contentAreaWillPaint() const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair contentAreaWillDraw];
}
void ScrollAnimatorMac::mouseEnteredContentArea()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair mouseEnteredContentArea];
}
void ScrollAnimatorMac::mouseExitedContentArea()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair mouseExitedContentArea];
}
void ScrollAnimatorMac::mouseMovedInContentArea()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair mouseMovedInContentArea];
}
void ScrollAnimatorMac::mouseEnteredScrollbar(Scrollbar* scrollbar) const
{
// At this time, only legacy scrollbars needs to send notifications here.
if (recommendedScrollerStyle() != NSScrollerStyleLegacy)
return;
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
if (NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar))
[painter mouseEnteredScroller];
}
void ScrollAnimatorMac::mouseExitedScrollbar(Scrollbar* scrollbar) const
{
// At this time, only legacy scrollbars needs to send notifications here.
if (recommendedScrollerStyle() != NSScrollerStyleLegacy)
return;
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
if (NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar))
[painter mouseExitedScroller];
}
void ScrollAnimatorMac::mouseIsDownInScrollbar(Scrollbar* scrollbar, bool mouseIsDown) const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
if (NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar)) {
[painter setTracking:mouseIsDown];
if (mouseIsDown)
[m_scrollerImpPair beginScrollGesture];
else
[m_scrollerImpPair endScrollGesture];
}
}
void ScrollAnimatorMac::willStartLiveResize()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair startLiveResize];
}
void ScrollAnimatorMac::contentsResized() const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair contentAreaDidResize];
}
void ScrollAnimatorMac::willEndLiveResize()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair endLiveResize];
}
void ScrollAnimatorMac::contentAreaDidShow()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair windowOrderedIn];
}
void ScrollAnimatorMac::contentAreaDidHide()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair windowOrderedOut];
}
void ScrollAnimatorMac::didBeginScrollGesture() const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair beginScrollGesture];
#if ENABLE(CSS_SCROLL_SNAP) || ENABLE(RUBBER_BANDING)
if (m_wheelEventTestTrigger)
m_wheelEventTestTrigger->deferTestsForReason(reinterpret_cast<WheelEventTestTrigger::ScrollableAreaIdentifier>(this), WheelEventTestTrigger::ContentScrollInProgress);
#endif
}
void ScrollAnimatorMac::didEndScrollGesture() const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair endScrollGesture];
#if ENABLE(CSS_SCROLL_SNAP) || ENABLE(RUBBER_BANDING)
if (m_wheelEventTestTrigger)
m_wheelEventTestTrigger->removeTestDeferralForReason(reinterpret_cast<WheelEventTestTrigger::ScrollableAreaIdentifier>(this), WheelEventTestTrigger::ContentScrollInProgress);
#endif
}
void ScrollAnimatorMac::mayBeginScrollGesture() const
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
[m_scrollerImpPair beginScrollGesture];
[m_scrollerImpPair contentAreaScrolled];
}
void ScrollAnimatorMac::lockOverlayScrollbarStateToHidden(bool shouldLockState)
{
if (shouldLockState)
[m_scrollerImpPair lockOverlayScrollerState:NSOverlayScrollerStateHidden];
else {
[m_scrollerImpPair unlockOverlayScrollerState];
// We never update scroller style for PainterControllers that are locked. If we have a pending
// need to update the style, do it once we've unlocked the scroller state.
if (m_needsScrollerStyleUpdate)
updateScrollerStyle();
}
}
bool ScrollAnimatorMac::scrollbarsCanBeActive() const
{
return ![m_scrollerImpPair overlayScrollerStateIsLocked];
}
void ScrollAnimatorMac::didAddVerticalScrollbar(Scrollbar* scrollbar)
{
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
ASSERT(!m_verticalScrollerImpDelegate);
m_verticalScrollerImpDelegate = adoptNS([[WebScrollerImpDelegate alloc] initWithScrollbar:scrollbar]);
[painter setDelegate:m_verticalScrollerImpDelegate.get()];
if (GraphicsLayer* layer = scrollbar->scrollableArea().layerForVerticalScrollbar())
[painter setLayer:layer->platformLayer()];
[m_scrollerImpPair setVerticalScrollerImp:painter];
if (scrollableArea().inLiveResize())
[painter setKnobAlpha:1];
}
void ScrollAnimatorMac::willRemoveVerticalScrollbar(Scrollbar* scrollbar)
{
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
ASSERT(m_verticalScrollerImpDelegate);
[m_verticalScrollerImpDelegate invalidate];
m_verticalScrollerImpDelegate = nullptr;
[painter setDelegate:nil];
[m_scrollerImpPair setVerticalScrollerImp:nil];
}
void ScrollAnimatorMac::didAddHorizontalScrollbar(Scrollbar* scrollbar)
{
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
ASSERT(!m_horizontalScrollerImpDelegate);
m_horizontalScrollerImpDelegate = adoptNS([[WebScrollerImpDelegate alloc] initWithScrollbar:scrollbar]);
[painter setDelegate:m_horizontalScrollerImpDelegate.get()];
if (GraphicsLayer* layer = scrollbar->scrollableArea().layerForHorizontalScrollbar())
[painter setLayer:layer->platformLayer()];
[m_scrollerImpPair setHorizontalScrollerImp:painter];
if (scrollableArea().inLiveResize())
[painter setKnobAlpha:1];
}
void ScrollAnimatorMac::willRemoveHorizontalScrollbar(Scrollbar* scrollbar)
{
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
ASSERT(m_horizontalScrollerImpDelegate);
[m_horizontalScrollerImpDelegate invalidate];
m_horizontalScrollerImpDelegate = nullptr;
[painter setDelegate:nil];
[m_scrollerImpPair setHorizontalScrollerImp:nil];
}
void ScrollAnimatorMac::invalidateScrollbarPartLayers(Scrollbar* scrollbar)
{
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
[painter setNeedsDisplay:YES];
}
void ScrollAnimatorMac::verticalScrollbarLayerDidChange()
{
GraphicsLayer* layer = m_scrollableArea.layerForVerticalScrollbar();
Scrollbar* scrollbar = m_scrollableArea.verticalScrollbar();
if (!scrollbar)
return;
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
[painter setLayer:layer ? layer->platformLayer() : nil];
}
void ScrollAnimatorMac::horizontalScrollbarLayerDidChange()
{
GraphicsLayer* layer = m_scrollableArea.layerForHorizontalScrollbar();
Scrollbar* scrollbar = m_scrollableArea.horizontalScrollbar();
if (!scrollbar)
return;
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return;
[painter setLayer:layer ? layer->platformLayer() : nil];
}
bool ScrollAnimatorMac::shouldScrollbarParticipateInHitTesting(Scrollbar* scrollbar)
{
// Non-overlay scrollbars should always participate in hit testing.
if (recommendedScrollerStyle() != NSScrollerStyleOverlay)
return true;
if (scrollbar->isAlphaLocked())
return true;
// Overlay scrollbars should participate in hit testing whenever they are at all visible.
NSScrollerImp *painter = scrollerImpForScrollbar(*scrollbar);
if (!painter)
return false;
return [painter knobAlpha] > 0;
}
void ScrollAnimatorMac::notifyContentAreaScrolled(const FloatSize& delta)
{
// This function is called when a page is going into the page cache, but the page
// isn't really scrolling in that case. We should only pass the message on to the
// ScrollerImpPair when we're really scrolling on an active page.
if ([m_scrollerImpPair overlayScrollerStateIsLocked])
return;
if (m_scrollableArea.isHandlingWheelEvent())
sendContentAreaScrolled(delta);
else
sendContentAreaScrolledSoon(delta);
}
void ScrollAnimatorMac::cancelAnimations()
{
m_haveScrolledSincePageLoad = false;
if (scrollbarPaintTimerIsActive())
stopScrollbarPaintTimer();
[m_horizontalScrollerImpDelegate cancelAnimations];
[m_verticalScrollerImpDelegate cancelAnimations];
}
void ScrollAnimatorMac::handleWheelEventPhase(PlatformWheelEventPhase phase)
{
// This may not have been set to true yet if the wheel event was handled by the ScrollingTree,
// So set it to true here.
m_haveScrolledSincePageLoad = true;
if (phase == PlatformWheelEventPhaseBegan)
didBeginScrollGesture();
else if (phase == PlatformWheelEventPhaseEnded || phase == PlatformWheelEventPhaseCancelled)
didEndScrollGesture();
else if (phase == PlatformWheelEventPhaseMayBegin)
mayBeginScrollGesture();
}
#if ENABLE(RUBBER_BANDING)
bool ScrollAnimatorMac::shouldForwardWheelEventsToParent(const PlatformWheelEvent& wheelEvent)
{
if (std::abs(wheelEvent.deltaY()) >= std::abs(wheelEvent.deltaX()))
return !allowsVerticalStretching(wheelEvent);
return !allowsHorizontalStretching(wheelEvent);
}
bool ScrollAnimatorMac::handleWheelEvent(const PlatformWheelEvent& wheelEvent)
{
m_haveScrolledSincePageLoad = true;
if (!wheelEvent.hasPreciseScrollingDeltas() || !rubberBandingEnabledForSystem())
return ScrollAnimator::handleWheelEvent(wheelEvent);
// FIXME: This is somewhat roundabout hack to allow forwarding wheel events
// up to the parent scrollable area. It takes advantage of the fact that
// the base class implementation of handleWheelEvent will not accept the
// wheel event if there is nowhere to scroll.
if (shouldForwardWheelEventsToParent(wheelEvent)) {
bool didHandleEvent = ScrollAnimator::handleWheelEvent(wheelEvent);
if (didHandleEvent || (!wheelEvent.deltaX() && !wheelEvent.deltaY()))
handleWheelEventPhase(wheelEvent.phase());
return didHandleEvent;
}
bool didHandleEvent = m_scrollController.handleWheelEvent(wheelEvent);
if (didHandleEvent)
handleWheelEventPhase(wheelEvent.phase());
return didHandleEvent;
}
bool ScrollAnimatorMac::pinnedInDirection(const FloatSize& direction)
{
FloatSize limitDelta;
if (fabsf(direction.height()) >= fabsf(direction.width())) {
if (direction.height() < 0) {
// We are trying to scroll up. Make sure we are not pinned to the top
limitDelta.setHeight(m_scrollableArea.visibleContentRect().y() + m_scrollableArea.scrollOrigin().y());
} else {
// We are trying to scroll down. Make sure we are not pinned to the bottom
limitDelta.setHeight(m_scrollableArea.totalContentsSize().height() - (m_scrollableArea.visibleContentRect().maxY() + m_scrollableArea.scrollOrigin().y()));
}
} else if (direction.width()) {
if (direction.width() < 0) {
// We are trying to scroll left. Make sure we are not pinned to the left
limitDelta.setWidth(m_scrollableArea.visibleContentRect().x() + m_scrollableArea.scrollOrigin().x());
} else {
// We are trying to scroll right. Make sure we are not pinned to the right
limitDelta.setWidth(m_scrollableArea.totalContentsSize().width() - (m_scrollableArea.visibleContentRect().maxX() + m_scrollableArea.scrollOrigin().x()));
}
}
if ((direction.width() || direction.height()) && (limitDelta.width() < 1 && limitDelta.height() < 1))
return true;
return false;
}
// FIXME: We should find a way to share some of the code from newGestureIsStarting(), isAlreadyPinnedInDirectionOfGesture(),
// allowsVerticalStretching(), and allowsHorizontalStretching() with the implementation in ScrollingTreeFrameScrollingNodeMac.
static bool newGestureIsStarting(const PlatformWheelEvent& wheelEvent)
{
return wheelEvent.phase() == PlatformWheelEventPhaseMayBegin || wheelEvent.phase() == PlatformWheelEventPhaseBegan;
}
bool ScrollAnimatorMac::isAlreadyPinnedInDirectionOfGesture(const PlatformWheelEvent& wheelEvent, ScrollEventAxis axis)
{
switch (axis) {
case ScrollEventAxis::Vertical:
return (wheelEvent.deltaY() > 0 && m_scrollableArea.scrolledToTop()) || (wheelEvent.deltaY() < 0 && m_scrollableArea.scrolledToBottom());
case ScrollEventAxis::Horizontal:
return (wheelEvent.deltaX() > 0 && m_scrollableArea.scrolledToLeft()) || (wheelEvent.deltaX() < 0 && m_scrollableArea.scrolledToRight());
}
ASSERT_NOT_REACHED();
return false;
}
#if ENABLE(CSS_SCROLL_SNAP)
static bool gestureShouldBeginSnap(const PlatformWheelEvent& wheelEvent, const Vector<LayoutUnit>* snapOffsets)
{
if (!snapOffsets)
return false;
if (wheelEvent.phase() != PlatformWheelEventPhaseEnded && !wheelEvent.isEndOfMomentumScroll())
return false;
return true;
}
#endif
bool ScrollAnimatorMac::allowsVerticalStretching(const PlatformWheelEvent& wheelEvent)
{
switch (m_scrollableArea.verticalScrollElasticity()) {
case ScrollElasticityAutomatic: {
Scrollbar* hScroller = m_scrollableArea.horizontalScrollbar();
Scrollbar* vScroller = m_scrollableArea.verticalScrollbar();
bool scrollbarsAllowStretching = ((vScroller && vScroller->enabled()) || (!hScroller || !hScroller->enabled()));
bool eventPreventsStretching = m_scrollableArea.hasScrollableOrRubberbandableAncestor() && newGestureIsStarting(wheelEvent) && isAlreadyPinnedInDirectionOfGesture(wheelEvent, ScrollEventAxis::Vertical);
#if ENABLE(CSS_SCROLL_SNAP)
if (!eventPreventsStretching)
eventPreventsStretching = gestureShouldBeginSnap(wheelEvent, m_scrollableArea.verticalSnapOffsets());
#endif
return scrollbarsAllowStretching && !eventPreventsStretching;
}
case ScrollElasticityNone:
return false;
case ScrollElasticityAllowed:
return true;
}
ASSERT_NOT_REACHED();
return false;
}
bool ScrollAnimatorMac::allowsHorizontalStretching(const PlatformWheelEvent& wheelEvent)
{
switch (m_scrollableArea.horizontalScrollElasticity()) {
case ScrollElasticityAutomatic: {
Scrollbar* hScroller = m_scrollableArea.horizontalScrollbar();
Scrollbar* vScroller = m_scrollableArea.verticalScrollbar();
bool scrollbarsAllowStretching = ((hScroller && hScroller->enabled()) || (!vScroller || !vScroller->enabled()));
bool eventPreventsStretching = m_scrollableArea.hasScrollableOrRubberbandableAncestor() && newGestureIsStarting(wheelEvent) && isAlreadyPinnedInDirectionOfGesture(wheelEvent, ScrollEventAxis::Horizontal);
#if ENABLE(CSS_SCROLL_SNAP)
if (!eventPreventsStretching)
eventPreventsStretching = gestureShouldBeginSnap(wheelEvent, m_scrollableArea.horizontalSnapOffsets());
#endif
return scrollbarsAllowStretching && !eventPreventsStretching;
}
case ScrollElasticityNone:
return false;
case ScrollElasticityAllowed:
return true;
}
ASSERT_NOT_REACHED();
return false;
}
IntSize ScrollAnimatorMac::stretchAmount()
{
return m_scrollableArea.overhangAmount();
}
bool ScrollAnimatorMac::canScrollHorizontally()
{
Scrollbar* scrollbar = m_scrollableArea.horizontalScrollbar();
if (!scrollbar)
return false;
return scrollbar->enabled();
}
bool ScrollAnimatorMac::canScrollVertically()
{
Scrollbar* scrollbar = m_scrollableArea.verticalScrollbar();
if (!scrollbar)
return false;
return scrollbar->enabled();
}
bool ScrollAnimatorMac::shouldRubberBandInDirection(ScrollDirection)
{
return false;
}
void ScrollAnimatorMac::immediateScrollByWithoutContentEdgeConstraints(const FloatSize& delta)
{
m_scrollableArea.setConstrainsScrollingToContentEdge(false);
immediateScrollBy(delta);
m_scrollableArea.setConstrainsScrollingToContentEdge(true);
}
void ScrollAnimatorMac::immediateScrollBy(const FloatSize& delta)
{
FloatPoint currentPosition = this->currentPosition();
FloatPoint newPosition = adjustScrollPositionIfNecessary(currentPosition + delta);
if (newPosition == currentPosition)
return;
FloatSize adjustedDelta = newPosition - currentPosition;
m_currentPosition = newPosition;
notifyPositionChanged(adjustedDelta);
updateActiveScrollSnapIndexForOffset();
}
#endif
void ScrollAnimatorMac::updateScrollerStyle()
{
if ([m_scrollerImpPair overlayScrollerStateIsLocked]) {
m_needsScrollerStyleUpdate = true;
return;
}
ScrollbarThemeMac* macTheme = macScrollbarTheme();
if (!macTheme) {
m_needsScrollerStyleUpdate = false;
return;
}
macTheme->usesOverlayScrollbarsChanged();
NSScrollerStyle newStyle = [m_scrollerImpPair scrollerStyle];
if (Scrollbar* verticalScrollbar = scrollableArea().verticalScrollbar()) {
verticalScrollbar->invalidate();
NSScrollerImp *oldVerticalPainter = [m_scrollerImpPair verticalScrollerImp];
NSScrollerImp *newVerticalPainter = [NSScrollerImp scrollerImpWithStyle:newStyle controlSize:(NSControlSize)verticalScrollbar->controlSize() horizontal:NO replacingScrollerImp:oldVerticalPainter];
[m_scrollerImpPair setVerticalScrollerImp:newVerticalPainter];
macTheme->setNewPainterForScrollbar(*verticalScrollbar, newVerticalPainter);
macTheme->didCreateScrollerImp(*verticalScrollbar);
// The different scrollbar styles have different thicknesses, so we must re-set the
// frameRect to the new thickness, and the re-layout below will ensure the position
// and length are properly updated.
int thickness = macTheme->scrollbarThickness(verticalScrollbar->controlSize());
verticalScrollbar->setFrameRect(IntRect(0, 0, thickness, thickness));
}
if (Scrollbar* horizontalScrollbar = scrollableArea().horizontalScrollbar()) {
horizontalScrollbar->invalidate();
NSScrollerImp *oldHorizontalPainter = [m_scrollerImpPair horizontalScrollerImp];
NSScrollerImp *newHorizontalPainter = [NSScrollerImp scrollerImpWithStyle:newStyle controlSize:(NSControlSize)horizontalScrollbar->controlSize() horizontal:YES replacingScrollerImp:oldHorizontalPainter];
[m_scrollerImpPair setHorizontalScrollerImp:newHorizontalPainter];
macTheme->setNewPainterForScrollbar(*horizontalScrollbar, newHorizontalPainter);
macTheme->didCreateScrollerImp(*horizontalScrollbar);
// The different scrollbar styles have different thicknesses, so we must re-set the
// frameRect to the new thickness, and the re-layout below will ensure the position
// and length are properly updated.
int thickness = macTheme->scrollbarThickness(horizontalScrollbar->controlSize());
horizontalScrollbar->setFrameRect(IntRect(0, 0, thickness, thickness));
}
// If m_needsScrollerStyleUpdate is true, then the page is restoring from the page cache, and
// a relayout will happen on its own. Otherwise, we must initiate a re-layout ourselves.
scrollableArea().scrollbarStyleChanged(newStyle == NSScrollerStyleOverlay ? ScrollbarStyle::Overlay : ScrollbarStyle::AlwaysVisible, !m_needsScrollerStyleUpdate);
m_needsScrollerStyleUpdate = false;
}
void ScrollAnimatorMac::startScrollbarPaintTimer()
{
m_initialScrollbarPaintTimer.startOneShot(100_ms);
}
bool ScrollAnimatorMac::scrollbarPaintTimerIsActive() const
{
return m_initialScrollbarPaintTimer.isActive();
}
void ScrollAnimatorMac::stopScrollbarPaintTimer()
{
m_initialScrollbarPaintTimer.stop();
}
void ScrollAnimatorMac::initialScrollbarPaintTimerFired()
{
// To force the scrollbars to flash, we have to call hide first. Otherwise, the ScrollerImpPair
// might think that the scrollbars are already showing and bail early.
[m_scrollerImpPair hideOverlayScrollers];
[m_scrollerImpPair flashScrollers];
}
void ScrollAnimatorMac::sendContentAreaScrolledSoon(const FloatSize& delta)
{
m_contentAreaScrolledTimerScrollDelta = delta;
if (!m_sendContentAreaScrolledTimer.isActive())
m_sendContentAreaScrolledTimer.startOneShot(0_s);
if (m_wheelEventTestTrigger)
m_wheelEventTestTrigger->deferTestsForReason(reinterpret_cast<WheelEventTestTrigger::ScrollableAreaIdentifier>(this), WheelEventTestTrigger::ContentScrollInProgress);
}
void ScrollAnimatorMac::sendContentAreaScrolled(const FloatSize& delta)
{
[m_scrollerImpPair contentAreaScrolledInDirection:NSMakePoint(delta.width(), delta.height())];
}
void ScrollAnimatorMac::sendContentAreaScrolledTimerFired()
{
sendContentAreaScrolled(m_contentAreaScrolledTimerScrollDelta);
m_contentAreaScrolledTimerScrollDelta = FloatSize();
if (m_wheelEventTestTrigger)
m_wheelEventTestTrigger->removeTestDeferralForReason(reinterpret_cast<WheelEventTestTrigger::ScrollableAreaIdentifier>(this), WheelEventTestTrigger::ContentScrollInProgress);
}
void ScrollAnimatorMac::setVisibleScrollerThumbRect(const IntRect& scrollerThumb)
{
IntRect rectInViewCoordinates = scrollerThumb;
if (Scrollbar* verticalScrollbar = m_scrollableArea.verticalScrollbar())
rectInViewCoordinates = verticalScrollbar->convertToContainingView(scrollerThumb);
if (rectInViewCoordinates == m_visibleScrollerThumbRect)
return;
m_scrollableArea.setVisibleScrollerThumbRect(rectInViewCoordinates);
m_visibleScrollerThumbRect = rectInViewCoordinates;
}
} // namespace WebCore
#endif // ENABLE(SMOOTH_SCROLLING)