mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 00:55:37 +00:00
2201 lines
84 KiB
C++
2201 lines
84 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set sw=2 ts=8 et 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 <math.h> // for fabsf, fabs, atan2
|
|
#include <stdint.h> // for uint32_t, uint64_t
|
|
#include <sys/types.h> // for int32_t
|
|
#include <algorithm> // for max, min
|
|
#include "AnimationCommon.h" // for ComputedTimingFunction
|
|
#include "AsyncPanZoomController.h" // for AsyncPanZoomController, etc
|
|
#include "CompositorParent.h" // for CompositorParent
|
|
#include "FrameMetrics.h" // for FrameMetrics, etc
|
|
#include "GestureEventListener.h" // for GestureEventListener
|
|
#include "InputData.h" // for MultiTouchInput, etc
|
|
#include "LayerTransactionParent.h" // for LayerTransactionParent
|
|
#include "Units.h" // for CSSRect, CSSPoint, etc
|
|
#include "UnitTransforms.h" // for TransformTo
|
|
#include "base/message_loop.h" // for MessageLoop
|
|
#include "base/task.h" // for NewRunnableMethod, etc
|
|
#include "base/tracked.h" // for FROM_HERE
|
|
#include "gfxPrefs.h" // for gfxPrefs::UseProgressiveTilePainting
|
|
#include "gfxTypes.h" // for gfxFloat
|
|
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
|
|
#include "mozilla/BasicEvents.h" // for Modifiers, MODIFIER_*
|
|
#include "mozilla/ClearOnShutdown.h" // for ClearOnShutdown
|
|
#include "mozilla/Constants.h" // for M_PI
|
|
#include "mozilla/EventForwards.h" // for nsEventStatus_*
|
|
#include "mozilla/Preferences.h" // for Preferences
|
|
#include "mozilla/ReentrantMonitor.h" // for ReentrantMonitorAutoEnter, etc
|
|
#include "mozilla/StaticPtr.h" // for StaticAutoPtr
|
|
#include "mozilla/TimeStamp.h" // for TimeDuration, TimeStamp
|
|
#include "mozilla/dom/Touch.h" // for Touch
|
|
#include "mozilla/gfx/BasePoint.h" // for BasePoint
|
|
#include "mozilla/gfx/BaseRect.h" // for BaseRect
|
|
#include "mozilla/gfx/Point.h" // for Point, RoundedToInt, etc
|
|
#include "mozilla/gfx/Rect.h" // for RoundedIn
|
|
#include "mozilla/gfx/ScaleFactor.h" // for ScaleFactor
|
|
#include "mozilla/layers/APZCTreeManager.h" // for ScrollableLayerGuid
|
|
#include "mozilla/layers/AsyncCompositionManager.h" // for ViewTransform
|
|
#include "mozilla/layers/Axis.h" // for AxisX, AxisY, Axis, etc
|
|
#include "mozilla/layers/GeckoContentController.h"
|
|
#include "mozilla/layers/PCompositorParent.h" // for PCompositorParent
|
|
#include "mozilla/layers/TaskThrottler.h" // for TaskThrottler
|
|
#include "mozilla/mozalloc.h" // for operator new, etc
|
|
#include "mozilla/unused.h" // for unused
|
|
#include "mozilla/FloatingPoint.h" // for FuzzyEqualsMultiplicative
|
|
#include "nsAlgorithm.h" // for clamped
|
|
#include "nsAutoPtr.h" // for nsRefPtr
|
|
#include "nsCOMPtr.h" // for already_AddRefed
|
|
#include "nsDebug.h" // for NS_WARNING
|
|
#include "nsIDOMWindowUtils.h" // for nsIDOMWindowUtils
|
|
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
|
|
#include "nsMathUtils.h" // for NS_hypot
|
|
#include "nsPoint.h" // for nsIntPoint
|
|
#include "nsStyleConsts.h"
|
|
#include "nsStyleStruct.h" // for nsTimingFunction
|
|
#include "nsTArray.h" // for nsTArray, nsTArray_Impl, etc
|
|
#include "nsThreadUtils.h" // for NS_IsMainThread
|
|
#include "SharedMemoryBasic.h" // for SharedMemoryBasic
|
|
|
|
// #define APZC_ENABLE_RENDERTRACE
|
|
|
|
#define APZC_LOG(...)
|
|
// #define APZC_LOG(...) printf_stderr("APZC: " __VA_ARGS__)
|
|
#define APZC_LOG_FM(fm, prefix, ...) \
|
|
APZC_LOG(prefix ":" \
|
|
" i=(%ld %lld) cb=(%d %d %d %d) rcs=(%.3f %.3f) dp=(%.3f %.3f %.3f %.3f) dpm=(%.3f %.3f %.3f %.3f) um=%d " \
|
|
"v=(%.3f %.3f %.3f %.3f) s=(%.3f %.3f) sr=(%.3f %.3f %.3f %.3f) z=(%.3f %.3f %.3f %.3f) u=(%d %lu)\n", \
|
|
__VA_ARGS__, \
|
|
fm.mPresShellId, fm.GetScrollId(), \
|
|
fm.mCompositionBounds.x, fm.mCompositionBounds.y, fm.mCompositionBounds.width, fm.mCompositionBounds.height, \
|
|
fm.GetRootCompositionSize().width, fm.GetRootCompositionSize().height, \
|
|
fm.mDisplayPort.x, fm.mDisplayPort.y, fm.mDisplayPort.width, fm.mDisplayPort.height, \
|
|
fm.GetDisplayPortMargins().top, fm.GetDisplayPortMargins().right, fm.GetDisplayPortMargins().bottom, fm.GetDisplayPortMargins().left, \
|
|
fm.GetUseDisplayPortMargins() ? 1 : 0, \
|
|
fm.mViewport.x, fm.mViewport.y, fm.mViewport.width, fm.mViewport.height, \
|
|
fm.GetScrollOffset().x, fm.GetScrollOffset().y, \
|
|
fm.mScrollableRect.x, fm.mScrollableRect.y, fm.mScrollableRect.width, fm.mScrollableRect.height, \
|
|
fm.mDevPixelsPerCSSPixel.scale, fm.mResolution.scale, fm.mCumulativeResolution.scale, fm.GetZoom().scale, \
|
|
fm.GetScrollOffsetUpdated(), fm.GetScrollGeneration()); \
|
|
|
|
// Static helper functions
|
|
namespace {
|
|
|
|
int32_t
|
|
WidgetModifiersToDOMModifiers(mozilla::Modifiers aModifiers)
|
|
{
|
|
int32_t result = 0;
|
|
if (aModifiers & mozilla::MODIFIER_SHIFT) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_SHIFT;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_CONTROL) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_CONTROL;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_ALT) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_ALT;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_META) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_META;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_ALTGRAPH) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_ALTGRAPH;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_CAPSLOCK) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_CAPSLOCK;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_FN) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_FN;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_NUMLOCK) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_NUMLOCK;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_SCROLLLOCK) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_SCROLLLOCK;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_SYMBOLLOCK) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_SYMBOLLOCK;
|
|
}
|
|
if (aModifiers & mozilla::MODIFIER_OS) {
|
|
result |= nsIDOMWindowUtils::MODIFIER_OS;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
}
|
|
|
|
using namespace mozilla::css;
|
|
|
|
namespace mozilla {
|
|
namespace layers {
|
|
|
|
typedef mozilla::layers::AllowedTouchBehavior AllowedTouchBehavior;
|
|
|
|
/**
|
|
* Specifies whether touch-action property is in force.
|
|
*/
|
|
static bool gTouchActionPropertyEnabled = false;
|
|
|
|
/**
|
|
* Constant describing the tolerance in distance we use, multiplied by the
|
|
* device DPI, before we start panning the screen. This is to prevent us from
|
|
* accidentally processing taps as touch moves, and from very short/accidental
|
|
* touches moving the screen.
|
|
*/
|
|
static float gTouchStartTolerance = 1.0f/4.5f;
|
|
|
|
/**
|
|
* Default touch behavior (is used when not touch behavior is set).
|
|
*/
|
|
static const uint32_t DefaultTouchBehavior = AllowedTouchBehavior::VERTICAL_PAN |
|
|
AllowedTouchBehavior::HORIZONTAL_PAN |
|
|
AllowedTouchBehavior::ZOOM;
|
|
|
|
/**
|
|
* Angle from axis within which we stay axis-locked
|
|
*/
|
|
static const double AXIS_LOCK_ANGLE = M_PI / 6.0; // 30 degrees
|
|
|
|
/**
|
|
* The distance in inches the user must pan before axis lock can be broken
|
|
*/
|
|
static const float AXIS_BREAKOUT_THRESHOLD = 1.0f/32.0f;
|
|
|
|
/**
|
|
* The angle at which axis lock can be broken
|
|
*/
|
|
static const double AXIS_BREAKOUT_ANGLE = M_PI / 8.0; // 22.5 degrees
|
|
|
|
/**
|
|
* Angle from axis to the line drawn by pan move.
|
|
* If angle is less than this value we can assume that panning
|
|
* can be done in allowed direction (horizontal or vertical).
|
|
* Currently used only for touch-action css property stuff and was
|
|
* added to keep behavior consistent with IE.
|
|
*/
|
|
static const double ALLOWED_DIRECT_PAN_ANGLE = M_PI / 3.0; // 60 degrees
|
|
|
|
/**
|
|
* The preferred axis locking style. See AxisLockMode for possible values.
|
|
*/
|
|
static int32_t gAxisLockMode = 0;
|
|
|
|
/**
|
|
* Maximum amount of time while panning before sending a viewport change. This
|
|
* will asynchronously repaint the page. It is also forced when panning stops.
|
|
*/
|
|
static int32_t gPanRepaintInterval = 250;
|
|
|
|
/**
|
|
* Maximum amount of time flinging before sending a viewport change. This will
|
|
* asynchronously repaint the page.
|
|
*/
|
|
static int32_t gFlingRepaintInterval = 75;
|
|
|
|
/**
|
|
* Minimum amount of speed along an axis before we switch to "skate" multipliers
|
|
* rather than using the "stationary" multipliers.
|
|
*/
|
|
static float gMinSkateSpeed = 1.0f;
|
|
|
|
/**
|
|
* Whether or not to use the estimated paint duration as a factor when projecting
|
|
* the displayport in the direction of scrolling. If this value is set to false,
|
|
* a constant 50ms paint time is used; the projection can be scaled as desired
|
|
* using the gVelocityBias pref below.
|
|
*/
|
|
static bool gUsePaintDuration = true;
|
|
|
|
/**
|
|
* How much to adjust the displayport in the direction of scrolling. This value
|
|
* is multiplied by the velocity and added to the displayport offset.
|
|
*/
|
|
static float gVelocityBias = 1.0f;
|
|
|
|
/**
|
|
* Duration of a zoom to animation.
|
|
*/
|
|
static const TimeDuration ZOOM_TO_DURATION = TimeDuration::FromSeconds(0.25);
|
|
|
|
/**
|
|
* Computed time function used for sampling frames of a zoom to animation.
|
|
*/
|
|
StaticAutoPtr<ComputedTimingFunction> gComputedTimingFunction;
|
|
|
|
/**
|
|
* Maximum zoom amount, always used, even if a page asks for higher.
|
|
*/
|
|
static const CSSToScreenScale MAX_ZOOM(8.0f);
|
|
|
|
/**
|
|
* Minimum zoom amount, always used, even if a page asks for lower.
|
|
*/
|
|
static const CSSToScreenScale MIN_ZOOM(0.125f);
|
|
|
|
/**
|
|
* Amount of time before we timeout response from content. For example, if
|
|
* content is being unruly/slow and we don't get a response back within this
|
|
* time, we will just pretend that content did not preventDefault any touch
|
|
* events we dispatched to it.
|
|
*/
|
|
static int gContentResponseTimeout = 300;
|
|
|
|
/**
|
|
* Number of samples to store of how long it took to paint after the previous
|
|
* requests.
|
|
*/
|
|
static int gNumPaintDurationSamples = 3;
|
|
|
|
/**
|
|
* The multiplier we apply to the displayport size if it is skating (current
|
|
* velocity is above gMinSkateSpeed). We prefer to increase the size of the
|
|
* Y axis because it is more natural in the case that a user is reading a page
|
|
* that scrolls up/down. Note that one, both or neither of these may be used
|
|
* at any instant.
|
|
* In general we want g[XY]SkateSizeMultiplier to be smaller than the corresponding
|
|
* stationary size multiplier because when panning fast we would like to paint
|
|
* less and get faster, more predictable paint times. When panning slowly we
|
|
* can afford to paint more even though it's slower.
|
|
*/
|
|
static float gXSkateSizeMultiplier = 1.5f;
|
|
static float gYSkateSizeMultiplier = 2.5f;
|
|
|
|
/**
|
|
* The multiplier we apply to the displayport size if it is not skating (see
|
|
* documentation for gXSkateSizeMultiplier).
|
|
*/
|
|
static float gXStationarySizeMultiplier = 3.0f;
|
|
static float gYStationarySizeMultiplier = 3.5f;
|
|
|
|
/**
|
|
* The time period in ms that throttles mozbrowserasyncscroll event.
|
|
* Default is 100ms if there is no "apz.asyncscroll.throttle" in preference.
|
|
*/
|
|
|
|
static int gAsyncScrollThrottleTime = 100;
|
|
|
|
/**
|
|
* The timeout in ms for mAsyncScrollTimeoutTask delay task.
|
|
* Default is 300ms if there is no "apz.asyncscroll.timeout" in preference.
|
|
*/
|
|
static int gAsyncScrollTimeout = 300;
|
|
|
|
/**
|
|
* Pref that enables integration with the Metro "cross-slide" gesture.
|
|
*/
|
|
static bool gCrossSlideEnabled = false;
|
|
|
|
/**
|
|
* Pref that allows or disallows checkerboarding
|
|
*/
|
|
static bool gAllowCheckerboarding = true;
|
|
|
|
/**
|
|
* Pref that enables enlarging of the displayport along one axis when the
|
|
* generated displayport's size is beyond that of the scrollable rect on the
|
|
* opposite axis.
|
|
*/
|
|
static bool gEnlargeDisplayPortWhenClipped = false;
|
|
|
|
/**
|
|
* Is aAngle within the given threshold of the horizontal axis?
|
|
* @param aAngle an angle in radians in the range [0, pi]
|
|
* @param aThreshold an angle in radians in the range [0, pi/2]
|
|
*/
|
|
static bool IsCloseToHorizontal(float aAngle, float aThreshold)
|
|
{
|
|
return (aAngle < aThreshold || aAngle > (M_PI - aThreshold));
|
|
}
|
|
|
|
// As above, but for the vertical axis.
|
|
static bool IsCloseToVertical(float aAngle, float aThreshold)
|
|
{
|
|
return (fabs(aAngle - (M_PI / 2)) < aThreshold);
|
|
}
|
|
|
|
template <typename Units>
|
|
static bool IsZero(const gfx::PointTyped<Units>& aPoint)
|
|
{
|
|
return FuzzyEqualsMultiplicative(aPoint.x, 0.0f)
|
|
&& FuzzyEqualsMultiplicative(aPoint.y, 0.0f);
|
|
}
|
|
|
|
static inline void LogRendertraceRect(const ScrollableLayerGuid& aGuid, const char* aDesc, const char* aColor, const CSSRect& aRect)
|
|
{
|
|
#ifdef APZC_ENABLE_RENDERTRACE
|
|
static const TimeStamp sRenderStart = TimeStamp::Now();
|
|
TimeDuration delta = TimeStamp::Now() - sRenderStart;
|
|
printf_stderr("(%llu,%lu,%llu)%s RENDERTRACE %f rect %s %f %f %f %f\n",
|
|
aGuid.mLayersId, aGuid.mPresShellId, aGuid.GetScrollId(),
|
|
aDesc, delta.ToMilliseconds(), aColor,
|
|
aRect.x, aRect.y, aRect.width, aRect.height);
|
|
#endif
|
|
}
|
|
|
|
static TimeStamp sFrameTime;
|
|
|
|
// Counter used to give each APZC a unique id
|
|
static uint32_t sAsyncPanZoomControllerCount = 0;
|
|
|
|
static TimeStamp
|
|
GetFrameTime() {
|
|
if (sFrameTime.IsNull()) {
|
|
return TimeStamp::Now();
|
|
}
|
|
return sFrameTime;
|
|
}
|
|
|
|
class FlingAnimation: public AsyncPanZoomAnimation {
|
|
public:
|
|
FlingAnimation(AsyncPanZoomController& aApzc)
|
|
: AsyncPanZoomAnimation(TimeDuration::FromMilliseconds(gFlingRepaintInterval))
|
|
, mApzc(aApzc)
|
|
{}
|
|
/**
|
|
* Advances a fling by an interpolated amount based on the passed in |aDelta|.
|
|
* This should be called whenever sampling the content transform for this
|
|
* frame. Returns true if the fling animation should be advanced by one frame,
|
|
* or false if there is no fling or the fling has ended.
|
|
*/
|
|
virtual bool Sample(FrameMetrics& aFrameMetrics,
|
|
const TimeDuration& aDelta);
|
|
|
|
private:
|
|
AsyncPanZoomController& mApzc;
|
|
};
|
|
|
|
class ZoomAnimation: public AsyncPanZoomAnimation {
|
|
public:
|
|
ZoomAnimation(CSSPoint aStartOffset, CSSToScreenScale aStartZoom,
|
|
CSSPoint aEndOffset, CSSToScreenScale aEndZoom)
|
|
: mStartOffset(aStartOffset)
|
|
, mStartZoom(aStartZoom)
|
|
, mEndOffset(aEndOffset)
|
|
, mEndZoom(aEndZoom)
|
|
{}
|
|
|
|
virtual bool Sample(FrameMetrics& aFrameMetrics,
|
|
const TimeDuration& aDelta);
|
|
|
|
private:
|
|
TimeDuration mDuration;
|
|
|
|
// Old metrics from before we started a zoom animation. This is only valid
|
|
// when we are in the "ANIMATED_ZOOM" state. This is used so that we can
|
|
// interpolate between the start and end frames. We only use the
|
|
// |mViewportScrollOffset| and |mResolution| fields on this.
|
|
CSSPoint mStartOffset;
|
|
CSSToScreenScale mStartZoom;
|
|
|
|
// Target metrics for a zoom to animation. This is only valid when we are in
|
|
// the "ANIMATED_ZOOM" state. We only use the |mViewportScrollOffset| and
|
|
// |mResolution| fields on this.
|
|
CSSPoint mEndOffset;
|
|
CSSToScreenScale mEndZoom;
|
|
};
|
|
|
|
void
|
|
AsyncPanZoomController::SetFrameTime(const TimeStamp& aTime) {
|
|
sFrameTime = aTime;
|
|
}
|
|
|
|
/*static*/ void
|
|
AsyncPanZoomController::InitializeGlobalState()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
static bool sInitialized = false;
|
|
if (sInitialized)
|
|
return;
|
|
sInitialized = true;
|
|
|
|
Preferences::AddBoolVarCache(&gTouchActionPropertyEnabled, "layout.css.touch_action.enabled", gTouchActionPropertyEnabled);
|
|
Preferences::AddIntVarCache(&gPanRepaintInterval, "apz.pan_repaint_interval", gPanRepaintInterval);
|
|
Preferences::AddIntVarCache(&gFlingRepaintInterval, "apz.fling_repaint_interval", gFlingRepaintInterval);
|
|
Preferences::AddFloatVarCache(&gMinSkateSpeed, "apz.min_skate_speed", gMinSkateSpeed);
|
|
Preferences::AddBoolVarCache(&gUsePaintDuration, "apz.use_paint_duration", gUsePaintDuration);
|
|
Preferences::AddFloatVarCache(&gVelocityBias, "apz.velocity_bias", gVelocityBias);
|
|
Preferences::AddIntVarCache(&gContentResponseTimeout, "apz.content_response_timeout", gContentResponseTimeout);
|
|
Preferences::AddIntVarCache(&gNumPaintDurationSamples, "apz.num_paint_duration_samples", gNumPaintDurationSamples);
|
|
Preferences::AddFloatVarCache(&gTouchStartTolerance, "apz.touch_start_tolerance", gTouchStartTolerance);
|
|
Preferences::AddFloatVarCache(&gXSkateSizeMultiplier, "apz.x_skate_size_multiplier", gXSkateSizeMultiplier);
|
|
Preferences::AddFloatVarCache(&gYSkateSizeMultiplier, "apz.y_skate_size_multiplier", gYSkateSizeMultiplier);
|
|
Preferences::AddFloatVarCache(&gXStationarySizeMultiplier, "apz.x_stationary_size_multiplier", gXStationarySizeMultiplier);
|
|
Preferences::AddFloatVarCache(&gYStationarySizeMultiplier, "apz.y_stationary_size_multiplier", gYStationarySizeMultiplier);
|
|
Preferences::AddIntVarCache(&gAsyncScrollThrottleTime, "apz.asyncscroll.throttle", gAsyncScrollThrottleTime);
|
|
Preferences::AddIntVarCache(&gAsyncScrollTimeout, "apz.asyncscroll.timeout", gAsyncScrollTimeout);
|
|
Preferences::AddBoolVarCache(&gCrossSlideEnabled, "apz.cross_slide.enabled", gCrossSlideEnabled);
|
|
Preferences::AddIntVarCache(&gAxisLockMode, "apz.axis_lock_mode", gAxisLockMode);
|
|
Preferences::AddBoolVarCache(&gAllowCheckerboarding, "apz.allow-checkerboarding", gAllowCheckerboarding);
|
|
Preferences::AddBoolVarCache(&gEnlargeDisplayPortWhenClipped, "apz.enlarge_displayport_when_clipped",
|
|
gEnlargeDisplayPortWhenClipped);
|
|
|
|
gComputedTimingFunction = new ComputedTimingFunction();
|
|
gComputedTimingFunction->Init(
|
|
nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE));
|
|
ClearOnShutdown(&gComputedTimingFunction);
|
|
}
|
|
|
|
AsyncPanZoomController::AsyncPanZoomController(uint64_t aLayersId,
|
|
APZCTreeManager* aTreeManager,
|
|
GeckoContentController* aGeckoContentController,
|
|
GestureBehavior aGestures)
|
|
: mLayersId(aLayersId),
|
|
mCrossProcessCompositorParent(nullptr),
|
|
mPaintThrottler(GetFrameTime()),
|
|
mGeckoContentController(aGeckoContentController),
|
|
mRefPtrMonitor("RefPtrMonitor"),
|
|
mMonitor("AsyncPanZoomController"),
|
|
mTouchActionPropertyEnabled(gTouchActionPropertyEnabled),
|
|
mContentResponseTimeoutTask(nullptr),
|
|
mX(MOZ_THIS_IN_INITIALIZER_LIST()),
|
|
mY(MOZ_THIS_IN_INITIALIZER_LIST()),
|
|
mPanDirRestricted(false),
|
|
mZoomConstraints(false, false, MIN_ZOOM, MAX_ZOOM),
|
|
mLastSampleTime(GetFrameTime()),
|
|
mState(NOTHING),
|
|
mLastAsyncScrollTime(GetFrameTime()),
|
|
mLastAsyncScrollOffset(0, 0),
|
|
mCurrentAsyncScrollOffset(0, 0),
|
|
mAsyncScrollTimeoutTask(nullptr),
|
|
mHandlingTouchQueue(false),
|
|
mAllowedTouchBehaviorSet(false),
|
|
mPreventDefault(false),
|
|
mPreventDefaultSet(false),
|
|
mTreeManager(aTreeManager),
|
|
mAPZCId(sAsyncPanZoomControllerCount++),
|
|
mSharedFrameMetricsBuffer(nullptr),
|
|
mSharedLock(nullptr)
|
|
{
|
|
MOZ_COUNT_CTOR(AsyncPanZoomController);
|
|
|
|
if (aGestures == USE_GESTURE_DETECTOR) {
|
|
mGestureEventListener = new GestureEventListener(this);
|
|
}
|
|
}
|
|
|
|
AsyncPanZoomController::~AsyncPanZoomController() {
|
|
|
|
PCompositorParent* compositor =
|
|
(mCrossProcessCompositorParent ? mCrossProcessCompositorParent : mCompositorParent.get());
|
|
|
|
// Only send the release message if the SharedFrameMetrics has been created.
|
|
if (compositor && mSharedFrameMetricsBuffer) {
|
|
unused << compositor->SendReleaseSharedCompositorFrameMetrics(mFrameMetrics.GetScrollId(), mAPZCId);
|
|
}
|
|
|
|
delete mSharedFrameMetricsBuffer;
|
|
delete mSharedLock;
|
|
|
|
MOZ_COUNT_DTOR(AsyncPanZoomController);
|
|
}
|
|
|
|
already_AddRefed<GeckoContentController>
|
|
AsyncPanZoomController::GetGeckoContentController() {
|
|
MonitorAutoLock lock(mRefPtrMonitor);
|
|
nsRefPtr<GeckoContentController> controller = mGeckoContentController;
|
|
return controller.forget();
|
|
}
|
|
|
|
already_AddRefed<GestureEventListener>
|
|
AsyncPanZoomController::GetGestureEventListener() {
|
|
MonitorAutoLock lock(mRefPtrMonitor);
|
|
nsRefPtr<GestureEventListener> listener = mGestureEventListener;
|
|
return listener.forget();
|
|
}
|
|
|
|
void
|
|
AsyncPanZoomController::Destroy()
|
|
{
|
|
{ // scope the lock
|
|
MonitorAutoLock lock(mRefPtrMonitor);
|
|
mGeckoContentController = nullptr;
|
|
mGestureEventListener = nullptr;
|
|
}
|
|
mPrevSibling = nullptr;
|
|
mLastChild = nullptr;
|
|
mParent = nullptr;
|
|
mTreeManager = nullptr;
|
|
}
|
|
|
|
bool
|
|
AsyncPanZoomController::IsDestroyed()
|
|
{
|
|
return mTreeManager == nullptr;
|
|
}
|
|
|
|
/* static */float
|
|
AsyncPanZoomController::GetTouchStartTolerance()
|
|
{
|
|
return (gTouchStartTolerance * APZCTreeManager::GetDPI());
|
|
}
|
|
|
|
/* static */AsyncPanZoomController::AxisLockMode AsyncPanZoomController::GetAxisLockMode()
|
|
{
|
|
return static_cast<AxisLockMode>(gAxisLockMode);
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::ReceiveInputEvent(const InputData& aEvent) {
|
|
// If we may have touch listeners and touch action property is enabled, we
|
|
// enable the machinery that allows touch listeners to preventDefault any touch inputs
|
|
// and also waits for the allowed touch behavior values to be received from the outside.
|
|
// This should not happen unless there are actually touch listeners and touch-action property
|
|
// enable as it introduces potentially unbounded lag because it causes a round-trip through
|
|
// content. Usually, if content is responding in a timely fashion, this only introduces a
|
|
// nearly constant few hundred ms of lag.
|
|
if (mFrameMetrics.mMayHaveTouchListeners && aEvent.mInputType == MULTITOUCH_INPUT &&
|
|
(mState == NOTHING || mState == TOUCHING || IsPanningState(mState))) {
|
|
const MultiTouchInput& multiTouchInput = aEvent.AsMultiTouchInput();
|
|
if (multiTouchInput.mType == MultiTouchInput::MULTITOUCH_START) {
|
|
mAllowedTouchBehaviors.Clear();
|
|
mAllowedTouchBehaviorSet = false;
|
|
mPreventDefault = false;
|
|
mPreventDefaultSet = false;
|
|
SetState(WAITING_CONTENT_RESPONSE);
|
|
}
|
|
}
|
|
|
|
if (mState == WAITING_CONTENT_RESPONSE || mHandlingTouchQueue) {
|
|
if (aEvent.mInputType == MULTITOUCH_INPUT) {
|
|
const MultiTouchInput& multiTouchInput = aEvent.AsMultiTouchInput();
|
|
mTouchQueue.AppendElement(multiTouchInput);
|
|
|
|
SetContentResponseTimer();
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
return HandleInputEvent(aEvent);
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::HandleInputEvent(const InputData& aEvent) {
|
|
nsEventStatus rv = nsEventStatus_eIgnore;
|
|
|
|
switch (aEvent.mInputType) {
|
|
case MULTITOUCH_INPUT: {
|
|
const MultiTouchInput& multiTouchInput = aEvent.AsMultiTouchInput();
|
|
|
|
nsRefPtr<GestureEventListener> listener = GetGestureEventListener();
|
|
if (listener) {
|
|
rv = listener->HandleInputEvent(multiTouchInput);
|
|
if (rv == nsEventStatus_eConsumeNoDefault) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
switch (multiTouchInput.mType) {
|
|
case MultiTouchInput::MULTITOUCH_START: rv = OnTouchStart(multiTouchInput); break;
|
|
case MultiTouchInput::MULTITOUCH_MOVE: rv = OnTouchMove(multiTouchInput); break;
|
|
case MultiTouchInput::MULTITOUCH_END: rv = OnTouchEnd(multiTouchInput); break;
|
|
case MultiTouchInput::MULTITOUCH_CANCEL: rv = OnTouchCancel(multiTouchInput); break;
|
|
default: NS_WARNING("Unhandled multitouch"); break;
|
|
}
|
|
break;
|
|
}
|
|
default: NS_WARNING("Unhandled input event"); break;
|
|
}
|
|
|
|
mLastEventTime = aEvent.mTime;
|
|
return rv;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::HandleGestureEvent(const InputData& aEvent)
|
|
{
|
|
nsEventStatus rv = nsEventStatus_eIgnore;
|
|
|
|
switch (aEvent.mInputType) {
|
|
case PINCHGESTURE_INPUT: {
|
|
const PinchGestureInput& pinchGestureInput = aEvent.AsPinchGestureInput();
|
|
switch (pinchGestureInput.mType) {
|
|
case PinchGestureInput::PINCHGESTURE_START: rv = OnScaleBegin(pinchGestureInput); break;
|
|
case PinchGestureInput::PINCHGESTURE_SCALE: rv = OnScale(pinchGestureInput); break;
|
|
case PinchGestureInput::PINCHGESTURE_END: rv = OnScaleEnd(pinchGestureInput); break;
|
|
default: NS_WARNING("Unhandled pinch gesture"); break;
|
|
}
|
|
break;
|
|
}
|
|
case TAPGESTURE_INPUT: {
|
|
const TapGestureInput& tapGestureInput = aEvent.AsTapGestureInput();
|
|
switch (tapGestureInput.mType) {
|
|
case TapGestureInput::TAPGESTURE_LONG: rv = OnLongPress(tapGestureInput); break;
|
|
case TapGestureInput::TAPGESTURE_LONG_UP: rv = OnLongPressUp(tapGestureInput); break;
|
|
case TapGestureInput::TAPGESTURE_UP: rv = OnSingleTapUp(tapGestureInput); break;
|
|
case TapGestureInput::TAPGESTURE_CONFIRMED: rv = OnSingleTapConfirmed(tapGestureInput); break;
|
|
case TapGestureInput::TAPGESTURE_DOUBLE: rv = OnDoubleTap(tapGestureInput); break;
|
|
case TapGestureInput::TAPGESTURE_CANCEL: rv = OnCancelTap(tapGestureInput); break;
|
|
default: NS_WARNING("Unhandled tap gesture"); break;
|
|
}
|
|
break;
|
|
}
|
|
default: NS_WARNING("Unhandled input event"); break;
|
|
}
|
|
|
|
mLastEventTime = aEvent.mTime;
|
|
return rv;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnTouchStart(const MultiTouchInput& aEvent) {
|
|
APZC_LOG("%p got a touch-start in state %d\n", this, mState);
|
|
mPanDirRestricted = false;
|
|
ScreenIntPoint point = GetFirstTouchScreenPoint(aEvent);
|
|
|
|
switch (mState) {
|
|
case ANIMATING_ZOOM:
|
|
// We just interrupted a double-tap animation, so force a redraw in case
|
|
// this touchstart is just a tap that doesn't end up triggering a redraw.
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
RequestContentRepaint();
|
|
ScheduleComposite();
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
// Fall through.
|
|
case FLING:
|
|
CancelAnimation();
|
|
// Fall through.
|
|
case NOTHING:
|
|
mX.StartTouch(point.x);
|
|
mY.StartTouch(point.y);
|
|
SetState(TOUCHING);
|
|
break;
|
|
case TOUCHING:
|
|
case PANNING:
|
|
case PANNING_LOCKED_X:
|
|
case PANNING_LOCKED_Y:
|
|
case CROSS_SLIDING_X:
|
|
case CROSS_SLIDING_Y:
|
|
case PINCHING:
|
|
case WAITING_CONTENT_RESPONSE:
|
|
NS_WARNING("Received impossible touch in OnTouchStart");
|
|
break;
|
|
default:
|
|
NS_WARNING("Unhandled case in OnTouchStart");
|
|
break;
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnTouchMove(const MultiTouchInput& aEvent) {
|
|
APZC_LOG("%p got a touch-move in state %d\n", this, mState);
|
|
switch (mState) {
|
|
case FLING:
|
|
case NOTHING:
|
|
case ANIMATING_ZOOM:
|
|
// May happen if the user double-taps and drags without lifting after the
|
|
// second tap. Ignore the move if this happens.
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case CROSS_SLIDING_X:
|
|
case CROSS_SLIDING_Y:
|
|
// While cross-sliding, we don't want to consume any touchmove events for
|
|
// panning or zooming, and let the caller handle them instead.
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case TOUCHING: {
|
|
float panThreshold = GetTouchStartTolerance();
|
|
UpdateWithTouchAtDevicePoint(aEvent);
|
|
|
|
if (PanDistance() < panThreshold) {
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
if (mTouchActionPropertyEnabled &&
|
|
(GetTouchBehavior(0) & AllowedTouchBehavior::VERTICAL_PAN) &&
|
|
(GetTouchBehavior(0) & AllowedTouchBehavior::HORIZONTAL_PAN)) {
|
|
// User tries to trigger a touch behavior. If allowed touch behavior is vertical pan
|
|
// + horizontal pan (touch-action value is equal to AUTO) we can return ConsumeNoDefault
|
|
// status immediately to trigger cancel event further. It should happen independent of
|
|
// the parent type (whether it is scrolling or not).
|
|
StartPanning(aEvent);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
return StartPanning(aEvent);
|
|
}
|
|
|
|
case PANNING:
|
|
case PANNING_LOCKED_X:
|
|
case PANNING_LOCKED_Y:
|
|
TrackTouch(aEvent);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
|
|
case PINCHING:
|
|
// The scale gesture listener should have handled this.
|
|
NS_WARNING("Gesture listener should have handled pinching in OnTouchMove.");
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case WAITING_CONTENT_RESPONSE:
|
|
NS_WARNING("Received impossible touch in OnTouchMove");
|
|
break;
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnTouchEnd(const MultiTouchInput& aEvent) {
|
|
APZC_LOG("%p got a touch-end in state %d\n", this, mState);
|
|
|
|
// In case no touch behavior triggered previously we can avoid sending
|
|
// scroll events or requesting content repaint. This condition is added
|
|
// to make tests consistent - in case touch-action is NONE (and therefore
|
|
// no pans/zooms can be performed) we expected neither scroll or repaint
|
|
// events.
|
|
if (mState != NOTHING) {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
SendAsyncScrollEvent();
|
|
}
|
|
|
|
switch (mState) {
|
|
case FLING:
|
|
// Should never happen.
|
|
NS_WARNING("Received impossible touch end in OnTouchEnd.");
|
|
// Fall through.
|
|
case ANIMATING_ZOOM:
|
|
case NOTHING:
|
|
// May happen if the user double-taps and drags without lifting after the
|
|
// second tap. Ignore if this happens.
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case TOUCHING:
|
|
case CROSS_SLIDING_X:
|
|
case CROSS_SLIDING_Y:
|
|
SetState(NOTHING);
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case PANNING:
|
|
case PANNING_LOCKED_X:
|
|
case PANNING_LOCKED_Y:
|
|
{
|
|
// Make a local copy of the tree manager pointer and check if it's not
|
|
// null before calling FlushRepaintsForOverscrollHandoffChain().
|
|
// This is necessary because Destroy(), which nulls out mTreeManager,
|
|
// could be called concurrently.
|
|
APZCTreeManager* treeManagerLocal = mTreeManager;
|
|
if (treeManagerLocal) {
|
|
if (!treeManagerLocal->FlushRepaintsForOverscrollHandoffChain()) {
|
|
NS_WARNING("Overscroll handoff chain was empty during panning! This should not be the case.");
|
|
// Graceful handling of error condition
|
|
FlushRepaintForOverscrollHandoff();
|
|
}
|
|
}
|
|
}
|
|
mX.EndTouch();
|
|
mY.EndTouch();
|
|
SetState(FLING);
|
|
StartAnimation(new FlingAnimation(*this));
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
|
|
case PINCHING:
|
|
SetState(NOTHING);
|
|
// Scale gesture listener should have handled this.
|
|
NS_WARNING("Gesture listener should have handled pinching in OnTouchEnd.");
|
|
return nsEventStatus_eIgnore;
|
|
|
|
case WAITING_CONTENT_RESPONSE:
|
|
NS_WARNING("Received impossible touch in OnTouchEnd");
|
|
break;
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnTouchCancel(const MultiTouchInput& aEvent) {
|
|
APZC_LOG("%p got a touch-cancel in state %d\n", this, mState);
|
|
SetState(NOTHING);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnScaleBegin(const PinchGestureInput& aEvent) {
|
|
APZC_LOG("%p got a scale-begin in state %d\n", this, mState);
|
|
|
|
if (!TouchActionAllowZoom()) {
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
if (!mZoomConstraints.mAllowZoom) {
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
SetState(PINCHING);
|
|
mLastZoomFocus = ToParentLayerCoords(aEvent.mFocusPoint) - mFrameMetrics.mCompositionBounds.TopLeft();
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnScale(const PinchGestureInput& aEvent) {
|
|
APZC_LOG("%p got a scale in state %d\n", this, mState);
|
|
if (mState != PINCHING) {
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
float prevSpan = aEvent.mPreviousSpan;
|
|
if (fabsf(prevSpan) <= EPSILON || fabsf(aEvent.mCurrentSpan) <= EPSILON) {
|
|
// We're still handling it; we've just decided to throw this event away.
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
float spanRatio = aEvent.mCurrentSpan / aEvent.mPreviousSpan;
|
|
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
CSSToParentLayerScale userZoom = mFrameMetrics.GetZoomToParent();
|
|
ParentLayerPoint focusPoint = ToParentLayerCoords(aEvent.mFocusPoint) - mFrameMetrics.mCompositionBounds.TopLeft();
|
|
CSSPoint cssFocusPoint = focusPoint / userZoom;
|
|
|
|
CSSPoint focusChange = (mLastZoomFocus - focusPoint) / userZoom;
|
|
// If displacing by the change in focus point will take us off page bounds,
|
|
// then reduce the displacement such that it doesn't.
|
|
if (mX.DisplacementWillOverscroll(focusChange.x) != Axis::OVERSCROLL_NONE) {
|
|
focusChange.x -= mX.DisplacementWillOverscrollAmount(focusChange.x);
|
|
}
|
|
if (mY.DisplacementWillOverscroll(focusChange.y) != Axis::OVERSCROLL_NONE) {
|
|
focusChange.y -= mY.DisplacementWillOverscrollAmount(focusChange.y);
|
|
}
|
|
ScrollBy(focusChange);
|
|
|
|
// When we zoom in with focus, we can zoom too much towards the boundaries
|
|
// that we actually go over them. These are the needed displacements along
|
|
// either axis such that we don't overscroll the boundaries when zooming.
|
|
CSSPoint neededDisplacement;
|
|
|
|
CSSToParentLayerScale realMinZoom = mZoomConstraints.mMinZoom * mFrameMetrics.mTransformScale;
|
|
CSSToParentLayerScale realMaxZoom = mZoomConstraints.mMaxZoom * mFrameMetrics.mTransformScale;
|
|
realMinZoom.scale = std::max(realMinZoom.scale,
|
|
mFrameMetrics.mCompositionBounds.width / mFrameMetrics.mScrollableRect.width);
|
|
realMinZoom.scale = std::max(realMinZoom.scale,
|
|
mFrameMetrics.mCompositionBounds.height / mFrameMetrics.mScrollableRect.height);
|
|
if (realMaxZoom < realMinZoom) {
|
|
realMaxZoom = realMinZoom;
|
|
}
|
|
|
|
bool doScale = (spanRatio > 1.0 && userZoom < realMaxZoom) ||
|
|
(spanRatio < 1.0 && userZoom > realMinZoom);
|
|
|
|
if (doScale) {
|
|
spanRatio = clamped(spanRatio,
|
|
realMinZoom.scale / userZoom.scale,
|
|
realMaxZoom.scale / userZoom.scale);
|
|
|
|
// Note that the spanRatio here should never put us into OVERSCROLL_BOTH because
|
|
// up above we clamped it.
|
|
neededDisplacement.x = -mX.ScaleWillOverscrollAmount(spanRatio, cssFocusPoint.x);
|
|
neededDisplacement.y = -mY.ScaleWillOverscrollAmount(spanRatio, cssFocusPoint.y);
|
|
|
|
ScaleWithFocus(spanRatio, cssFocusPoint);
|
|
|
|
if (neededDisplacement != CSSPoint()) {
|
|
ScrollBy(neededDisplacement);
|
|
}
|
|
|
|
ScheduleComposite();
|
|
// We don't want to redraw on every scale, so don't use
|
|
// RequestContentRepaint()
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
|
|
mLastZoomFocus = focusPoint;
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnScaleEnd(const PinchGestureInput& aEvent) {
|
|
APZC_LOG("%p got a scale-end in state %d\n", this, mState);
|
|
|
|
SetState(NOTHING);
|
|
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
ScheduleComposite();
|
|
RequestContentRepaint();
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
bool
|
|
AsyncPanZoomController::ConvertToGecko(const ScreenPoint& aPoint, CSSPoint* aOut)
|
|
{
|
|
APZCTreeManager* treeManagerLocal = mTreeManager;
|
|
if (treeManagerLocal) {
|
|
gfx3DMatrix transformToApzc;
|
|
gfx3DMatrix transformToGecko;
|
|
treeManagerLocal->GetInputTransforms(this, transformToApzc, transformToGecko);
|
|
gfxPoint result = transformToGecko.Transform(gfxPoint(aPoint.x, aPoint.y));
|
|
// NOTE: This isn't *quite* LayoutDevicePoint, we just don't have a name
|
|
// for this coordinate space and it maps the closest to LayoutDevicePoint.
|
|
LayoutDevicePoint layoutPoint = LayoutDevicePoint(result.x, result.y);
|
|
{ // scoped lock to access mFrameMetrics
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
*aOut = layoutPoint / mFrameMetrics.mDevPixelsPerCSSPixel;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnLongPress(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a long-press in state %d\n", this, mState);
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
int32_t modifiers = WidgetModifiersToDOMModifiers(aEvent.modifiers);
|
|
CSSPoint geckoScreenPoint;
|
|
if (ConvertToGecko(aEvent.mPoint, &geckoScreenPoint)) {
|
|
SetState(WAITING_CONTENT_RESPONSE);
|
|
SetContentResponseTimer();
|
|
controller->HandleLongTap(geckoScreenPoint, modifiers, GetGuid());
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnLongPressUp(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a long-tap-up in state %d\n", this, mState);
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
int32_t modifiers = WidgetModifiersToDOMModifiers(aEvent.modifiers);
|
|
CSSPoint geckoScreenPoint;
|
|
if (ConvertToGecko(aEvent.mPoint, &geckoScreenPoint)) {
|
|
controller->HandleLongTapUp(geckoScreenPoint, modifiers, GetGuid());
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnSingleTapUp(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a single-tap-up in state %d\n", this, mState);
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
// If mZoomConstraints.mAllowDoubleTapZoom is true we wait for a call to OnSingleTapConfirmed before
|
|
// sending event to content
|
|
if (controller && !mZoomConstraints.mAllowDoubleTapZoom) {
|
|
int32_t modifiers = WidgetModifiersToDOMModifiers(aEvent.modifiers);
|
|
CSSPoint geckoScreenPoint;
|
|
if (ConvertToGecko(aEvent.mPoint, &geckoScreenPoint)) {
|
|
// Because this may be being running as part of APZCTreeManager::ReceiveInputEvent,
|
|
// calling controller->HandleSingleTap directly might mean that content receives
|
|
// the single tap message before the corresponding touch-up. To avoid that we
|
|
// schedule the singletap message to run on the next spin of the event loop.
|
|
// See bug 965381 for the issue this was causing.
|
|
controller->PostDelayedTask(
|
|
NewRunnableMethod(controller.get(), &GeckoContentController::HandleSingleTap,
|
|
geckoScreenPoint, modifiers, GetGuid()),
|
|
0);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnSingleTapConfirmed(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a single-tap-confirmed in state %d\n", this, mState);
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
int32_t modifiers = WidgetModifiersToDOMModifiers(aEvent.modifiers);
|
|
CSSPoint geckoScreenPoint;
|
|
if (ConvertToGecko(aEvent.mPoint, &geckoScreenPoint)) {
|
|
// See comment in OnSingleTapUp as to why we do this in PostDelayedTask.
|
|
controller->PostDelayedTask(
|
|
NewRunnableMethod(controller.get(), &GeckoContentController::HandleSingleTap,
|
|
geckoScreenPoint, modifiers, GetGuid()),
|
|
0);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnDoubleTap(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a double-tap in state %d\n", this, mState);
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
if (mZoomConstraints.mAllowDoubleTapZoom) {
|
|
int32_t modifiers = WidgetModifiersToDOMModifiers(aEvent.modifiers);
|
|
CSSPoint geckoScreenPoint;
|
|
if (ConvertToGecko(aEvent.mPoint, &geckoScreenPoint)) {
|
|
controller->HandleDoubleTap(geckoScreenPoint, modifiers, GetGuid());
|
|
}
|
|
}
|
|
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::OnCancelTap(const TapGestureInput& aEvent) {
|
|
APZC_LOG("%p got a cancel-tap in state %d\n", this, mState);
|
|
// XXX: Implement this.
|
|
return nsEventStatus_eIgnore;
|
|
}
|
|
|
|
float AsyncPanZoomController::PanDistance() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
return NS_hypot(mX.PanDistance(), mY.PanDistance());
|
|
}
|
|
|
|
const ScreenPoint AsyncPanZoomController::GetVelocityVector() {
|
|
return ScreenPoint(mX.GetVelocity(), mY.GetVelocity());
|
|
}
|
|
|
|
void AsyncPanZoomController::HandlePanningWithTouchAction(double aAngle, TouchBehaviorFlags aBehavior) {
|
|
// Handling of cross sliding will need to be added in this method after touch-action released
|
|
// enabled by default.
|
|
if ((aBehavior & AllowedTouchBehavior::VERTICAL_PAN) && (aBehavior & AllowedTouchBehavior::HORIZONTAL_PAN)) {
|
|
if (mX.Scrollable() && mY.Scrollable()) {
|
|
if (IsCloseToHorizontal(aAngle, AXIS_LOCK_ANGLE)) {
|
|
mY.SetAxisLocked(true);
|
|
SetState(PANNING_LOCKED_X);
|
|
} else if (IsCloseToVertical(aAngle, AXIS_LOCK_ANGLE)) {
|
|
mX.SetAxisLocked(true);
|
|
SetState(PANNING_LOCKED_Y);
|
|
} else {
|
|
SetState(PANNING);
|
|
}
|
|
} else if (mX.Scrollable() || mY.Scrollable()) {
|
|
SetState(PANNING);
|
|
} else {
|
|
SetState(NOTHING);
|
|
}
|
|
} else if (aBehavior & AllowedTouchBehavior::HORIZONTAL_PAN) {
|
|
// Using bigger angle for panning to keep behavior consistent
|
|
// with IE.
|
|
if (IsCloseToHorizontal(aAngle, ALLOWED_DIRECT_PAN_ANGLE)) {
|
|
mY.SetAxisLocked(true);
|
|
SetState(PANNING_LOCKED_X);
|
|
mPanDirRestricted = true;
|
|
} else {
|
|
// Don't treat these touches as pan/zoom movements since 'touch-action' value
|
|
// requires it.
|
|
SetState(NOTHING);
|
|
}
|
|
} else if (aBehavior & AllowedTouchBehavior::VERTICAL_PAN) {
|
|
if (IsCloseToVertical(aAngle, ALLOWED_DIRECT_PAN_ANGLE)) {
|
|
mX.SetAxisLocked(true);
|
|
SetState(PANNING_LOCKED_Y);
|
|
mPanDirRestricted = true;
|
|
} else {
|
|
SetState(NOTHING);
|
|
}
|
|
} else {
|
|
SetState(NOTHING);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::HandlePanning(double aAngle) {
|
|
if (!gCrossSlideEnabled && (!mX.Scrollable() || !mY.Scrollable())) {
|
|
SetState(PANNING);
|
|
} else if (IsCloseToHorizontal(aAngle, AXIS_LOCK_ANGLE)) {
|
|
mY.SetAxisLocked(true);
|
|
if (mX.Scrollable()) {
|
|
SetState(PANNING_LOCKED_X);
|
|
} else {
|
|
SetState(CROSS_SLIDING_X);
|
|
mX.SetAxisLocked(true);
|
|
}
|
|
} else if (IsCloseToVertical(aAngle, AXIS_LOCK_ANGLE)) {
|
|
mX.SetAxisLocked(true);
|
|
if (mY.Scrollable()) {
|
|
SetState(PANNING_LOCKED_Y);
|
|
} else {
|
|
SetState(CROSS_SLIDING_Y);
|
|
mY.SetAxisLocked(true);
|
|
}
|
|
} else {
|
|
SetState(PANNING);
|
|
}
|
|
}
|
|
|
|
nsEventStatus AsyncPanZoomController::StartPanning(const MultiTouchInput& aEvent) {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
ScreenIntPoint point = GetFirstTouchScreenPoint(aEvent);
|
|
float dx = mX.PanDistance(point.x);
|
|
float dy = mY.PanDistance(point.y);
|
|
|
|
// When the touch move breaks through the pan threshold, reposition the touch down origin
|
|
// so the page won't jump when we start panning.
|
|
mX.StartTouch(point.x);
|
|
mY.StartTouch(point.y);
|
|
mLastEventTime = aEvent.mTime;
|
|
|
|
double angle = atan2(dy, dx); // range [-pi, pi]
|
|
angle = fabs(angle); // range [0, pi]
|
|
|
|
if (mTouchActionPropertyEnabled) {
|
|
HandlePanningWithTouchAction(angle, GetTouchBehavior(0));
|
|
} else {
|
|
if (GetAxisLockMode() == FREE) {
|
|
SetState(PANNING);
|
|
return nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
|
|
HandlePanning(angle);
|
|
}
|
|
|
|
// Don't consume an event that didn't trigger a panning.
|
|
return IsPanningState(mState) ? nsEventStatus_eConsumeNoDefault
|
|
: nsEventStatus_eIgnore;
|
|
}
|
|
|
|
void AsyncPanZoomController::UpdateWithTouchAtDevicePoint(const MultiTouchInput& aEvent) {
|
|
ScreenIntPoint point = GetFirstTouchScreenPoint(aEvent);
|
|
TimeDuration timeDelta = TimeDuration().FromMilliseconds(aEvent.mTime - mLastEventTime);
|
|
|
|
// Probably a duplicate event, just throw it away.
|
|
if (timeDelta.ToMilliseconds() <= EPSILON) {
|
|
return;
|
|
}
|
|
|
|
mX.UpdateWithTouchAtDevicePoint(point.x, timeDelta);
|
|
mY.UpdateWithTouchAtDevicePoint(point.y, timeDelta);
|
|
}
|
|
|
|
void AsyncPanZoomController::AttemptScroll(const ScreenPoint& aStartPoint,
|
|
const ScreenPoint& aEndPoint,
|
|
uint32_t aOverscrollHandoffChainIndex) {
|
|
|
|
// "start - end" rather than "end - start" because e.g. moving your finger
|
|
// down (*positive* direction along y axis) causes the vertical scroll offset
|
|
// to *decrease* as the page follows your finger.
|
|
ScreenPoint displacement = aStartPoint - aEndPoint;
|
|
|
|
ScreenPoint overscroll; // will be used outside monitor block
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
CSSToScreenScale zoom = mFrameMetrics.GetZoom();
|
|
|
|
// Inversely scale the offset by the resolution (when you're zoomed further in,
|
|
// the same swipe should move you a shorter distance).
|
|
CSSPoint cssDisplacement = displacement / zoom;
|
|
|
|
CSSPoint cssOverscroll;
|
|
CSSPoint allowedDisplacement(mX.AdjustDisplacement(cssDisplacement.x,
|
|
cssOverscroll.x),
|
|
mY.AdjustDisplacement(cssDisplacement.y,
|
|
cssOverscroll.y));
|
|
overscroll = cssOverscroll * zoom;
|
|
|
|
if (!IsZero(allowedDisplacement)) {
|
|
ScrollBy(allowedDisplacement);
|
|
ScheduleComposite();
|
|
|
|
TimeDuration timePaintDelta = mPaintThrottler.TimeSinceLastRequest(GetFrameTime());
|
|
if (timePaintDelta.ToMilliseconds() > gPanRepaintInterval) {
|
|
RequestContentRepaint();
|
|
}
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
}
|
|
|
|
if (!IsZero(overscroll)) {
|
|
// "+ overscroll" rather than "- overscroll" because "overscroll" is what's
|
|
// left of "displacement", and "displacement" is "start - end".
|
|
CallDispatchScroll(aEndPoint + overscroll, aEndPoint, aOverscrollHandoffChainIndex + 1);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::TakeOverFling(ScreenPoint aVelocity) {
|
|
// We may have a pre-existing velocity for whatever reason (for example,
|
|
// a previously handed off fling). We don't want to clobber that.
|
|
mX.SetVelocity(mX.GetVelocity() + aVelocity.x);
|
|
mY.SetVelocity(mY.GetVelocity() + aVelocity.y);
|
|
SetState(FLING);
|
|
StartAnimation(new FlingAnimation(*this));
|
|
}
|
|
|
|
void AsyncPanZoomController::CallDispatchScroll(const ScreenPoint& aStartPoint, const ScreenPoint& aEndPoint,
|
|
uint32_t aOverscrollHandoffChainIndex) {
|
|
// Make a local copy of the tree manager pointer and check if it's not
|
|
// null before calling DispatchScroll(). This is necessary because
|
|
// Destroy(), which nulls out mTreeManager, could be called concurrently.
|
|
APZCTreeManager* treeManagerLocal = mTreeManager;
|
|
if (treeManagerLocal) {
|
|
treeManagerLocal->DispatchScroll(this, aStartPoint, aEndPoint,
|
|
aOverscrollHandoffChainIndex);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::TrackTouch(const MultiTouchInput& aEvent) {
|
|
ScreenIntPoint prevTouchPoint(mX.GetPos(), mY.GetPos());
|
|
ScreenIntPoint touchPoint = GetFirstTouchScreenPoint(aEvent);
|
|
TimeDuration timeDelta = TimeDuration().FromMilliseconds(aEvent.mTime - mLastEventTime);
|
|
|
|
// Probably a duplicate event, just throw it away.
|
|
if (timeDelta.ToMilliseconds() <= EPSILON) {
|
|
return;
|
|
}
|
|
|
|
// If we're axis-locked, check if the user is trying to break the lock
|
|
if (GetAxisLockMode() == STICKY && !mPanDirRestricted) {
|
|
ScreenIntPoint point = GetFirstTouchScreenPoint(aEvent);
|
|
float dx = mX.PanDistance(point.x);
|
|
float dy = mY.PanDistance(point.y);
|
|
|
|
double angle = atan2(dy, dx); // range [-pi, pi]
|
|
angle = fabs(angle); // range [0, pi]
|
|
|
|
float breakThreshold = AXIS_BREAKOUT_THRESHOLD * APZCTreeManager::GetDPI();
|
|
|
|
if (fabs(dx) > breakThreshold || fabs(dy) > breakThreshold) {
|
|
if (mState == PANNING_LOCKED_X || mState == CROSS_SLIDING_X) {
|
|
if (!IsCloseToHorizontal(angle, AXIS_BREAKOUT_ANGLE)) {
|
|
mY.SetAxisLocked(false);
|
|
SetState(PANNING);
|
|
}
|
|
} else if (mState == PANNING_LOCKED_Y || mState == CROSS_SLIDING_Y) {
|
|
if (!IsCloseToVertical(angle, AXIS_BREAKOUT_ANGLE)) {
|
|
mX.SetAxisLocked(false);
|
|
SetState(PANNING);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
UpdateWithTouchAtDevicePoint(aEvent);
|
|
|
|
CallDispatchScroll(prevTouchPoint, touchPoint, 0);
|
|
}
|
|
|
|
ScreenIntPoint& AsyncPanZoomController::GetFirstTouchScreenPoint(const MultiTouchInput& aEvent) {
|
|
return ((SingleTouchData&)aEvent.mTouches[0]).mScreenPoint;
|
|
}
|
|
|
|
bool FlingAnimation::Sample(FrameMetrics& aFrameMetrics,
|
|
const TimeDuration& aDelta) {
|
|
|
|
// If the fling is handed off to our APZC from a child, on the first call to
|
|
// Sample() aDelta might be negative because it's computed as the sample time
|
|
// from SampleContentTransformForFrame() minus our APZC's mLastSampleTime
|
|
// which is the time the child handed off the fling from its call to
|
|
// SampleContentTransformForFrame() with the same sample time. If we allow
|
|
// the negative aDelta to be processed, it will yield a displacement in the
|
|
// direction opposite to the fling, which can cause us to overscroll and
|
|
// hand off the fling to _our_ parent, which effectively kills the fling.
|
|
if (aDelta.ToMilliseconds() <= 0) {
|
|
return true;
|
|
}
|
|
|
|
bool shouldContinueFlingX = mApzc.mX.FlingApplyFrictionOrCancel(aDelta),
|
|
shouldContinueFlingY = mApzc.mY.FlingApplyFrictionOrCancel(aDelta);
|
|
// If we shouldn't continue the fling, let's just stop and repaint.
|
|
if (!shouldContinueFlingX && !shouldContinueFlingY) {
|
|
return false;
|
|
}
|
|
|
|
// AdjustDisplacement() zeroes out the Axis velocity if we're in overscroll.
|
|
// Since we need to hand off the velocity to the tree manager in such a case,
|
|
// we save it here. Would be ScreenVector instead of ScreenPoint if we had
|
|
// vector classes.
|
|
ScreenPoint velocity(mApzc.mX.GetVelocity(), mApzc.mY.GetVelocity());
|
|
|
|
ScreenPoint offset = velocity * aDelta.ToMilliseconds();
|
|
|
|
// Inversely scale the offset by the resolution (when you're zoomed further in,
|
|
// the same swipe should move you a shorter distance).
|
|
CSSPoint cssOffset = offset / aFrameMetrics.GetZoom();
|
|
CSSPoint overscroll;
|
|
aFrameMetrics.ScrollBy(CSSPoint(
|
|
mApzc.mX.AdjustDisplacement(cssOffset.x, overscroll.x),
|
|
mApzc.mY.AdjustDisplacement(cssOffset.y, overscroll.y)
|
|
));
|
|
|
|
// If the fling has caused us to reach the end of our scroll range, hand
|
|
// off the fling to the next APZC in the overscroll handoff chain.
|
|
if (!IsZero(overscroll)) {
|
|
// We may have reached the end of the scroll range along one axis but
|
|
// not the other. In such a case we only want to hand off the relevant
|
|
// component of the fling.
|
|
if (FuzzyEqualsMultiplicative(overscroll.x, 0.0f)) {
|
|
velocity.x = 0;
|
|
} else if (FuzzyEqualsMultiplicative(overscroll.y, 0.0f)) {
|
|
velocity.y = 0;
|
|
}
|
|
|
|
// To hand off the fling, we call APZCTreeManager::HandleFlingOverscroll()
|
|
// which starts a new fling in the next APZC in the handoff chain with
|
|
// the same velocity. For simplicity, the actual overscroll of the current
|
|
// sample is discarded rather than being handed off. The compositor should
|
|
// sample animations sufficiently frequently that this is not noticeable.
|
|
|
|
// Make a local copy of the tree manager pointer and check if it's not
|
|
// null before calling HandleFlingOverscroll(). This is necessary because
|
|
// Destroy(), which nulls out mTreeManager, could be called concurrently.
|
|
APZCTreeManager* treeManagerLocal = mApzc.mTreeManager;
|
|
if (treeManagerLocal) {
|
|
// APZC is holding mMonitor, so directly calling HandleFlingOverscroll()
|
|
// (which acquires the tree lock) would violate the lock ordering. Instead
|
|
// we schedule HandleFlingOverscroll() to be called after mMonitor is
|
|
// released.
|
|
mDeferredTasks.append(NewRunnableMethod(treeManagerLocal,
|
|
&APZCTreeManager::HandOffFling,
|
|
&mApzc,
|
|
velocity));
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void AsyncPanZoomController::StartAnimation(AsyncPanZoomAnimation* aAnimation)
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
mAnimation = aAnimation;
|
|
mLastSampleTime = GetFrameTime();
|
|
ScheduleComposite();
|
|
}
|
|
|
|
void AsyncPanZoomController::CancelAnimation() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
SetState(NOTHING);
|
|
mAnimation = nullptr;
|
|
}
|
|
|
|
void AsyncPanZoomController::SetCompositorParent(CompositorParent* aCompositorParent) {
|
|
mCompositorParent = aCompositorParent;
|
|
}
|
|
|
|
void AsyncPanZoomController::SetCrossProcessCompositorParent(PCompositorParent* aCrossProcessCompositorParent) {
|
|
mCrossProcessCompositorParent = aCrossProcessCompositorParent;
|
|
}
|
|
|
|
void AsyncPanZoomController::ScrollBy(const CSSPoint& aOffset) {
|
|
mFrameMetrics.ScrollBy(aOffset);
|
|
}
|
|
|
|
void AsyncPanZoomController::ScaleWithFocus(float aScale,
|
|
const CSSPoint& aFocus) {
|
|
mFrameMetrics.ZoomBy(aScale);
|
|
// We want to adjust the scroll offset such that the CSS point represented by aFocus remains
|
|
// at the same position on the screen before and after the change in zoom. The below code
|
|
// accomplishes this; see https://bugzilla.mozilla.org/show_bug.cgi?id=923431#c6 for an
|
|
// in-depth explanation of how.
|
|
mFrameMetrics.SetScrollOffset((mFrameMetrics.GetScrollOffset() + aFocus) - (aFocus / aScale));
|
|
}
|
|
|
|
/**
|
|
* Enlarges the displayport along both axes based on the velocity.
|
|
*/
|
|
static CSSSize
|
|
CalculateDisplayPortSize(const CSSSize& aCompositionSize,
|
|
const CSSPoint& aVelocity)
|
|
{
|
|
float xMultiplier = fabsf(aVelocity.x) < gMinSkateSpeed
|
|
? gXStationarySizeMultiplier
|
|
: gXSkateSizeMultiplier;
|
|
float yMultiplier = fabsf(aVelocity.y) < gMinSkateSpeed
|
|
? gYStationarySizeMultiplier
|
|
: gYSkateSizeMultiplier;
|
|
return CSSSize(aCompositionSize.width * xMultiplier,
|
|
aCompositionSize.height * yMultiplier);
|
|
}
|
|
|
|
/**
|
|
* Attempts to redistribute any area in the displayport that would get clipped
|
|
* by the scrollable rect, or be inaccessible due to disabled scrolling, to the
|
|
* other axis, while maintaining total displayport area.
|
|
*/
|
|
static void
|
|
RedistributeDisplayPortExcess(CSSSize& aDisplayPortSize,
|
|
const CSSRect& aScrollableRect)
|
|
{
|
|
float xSlack = std::max(0.0f, aDisplayPortSize.width - aScrollableRect.width);
|
|
float ySlack = std::max(0.0f, aDisplayPortSize.height - aScrollableRect.height);
|
|
|
|
if (ySlack > 0) {
|
|
// Reassign wasted y-axis displayport to the x-axis
|
|
aDisplayPortSize.height -= ySlack;
|
|
float xExtra = ySlack * aDisplayPortSize.width / aDisplayPortSize.height;
|
|
aDisplayPortSize.width += xExtra;
|
|
} else if (xSlack > 0) {
|
|
// Reassign wasted x-axis displayport to the y-axis
|
|
aDisplayPortSize.width -= xSlack;
|
|
float yExtra = xSlack * aDisplayPortSize.height / aDisplayPortSize.width;
|
|
aDisplayPortSize.height += yExtra;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
const LayerMargin AsyncPanZoomController::CalculatePendingDisplayPort(
|
|
const FrameMetrics& aFrameMetrics,
|
|
const ScreenPoint& aVelocity,
|
|
double aEstimatedPaintDuration)
|
|
{
|
|
CSSSize compositionBounds = aFrameMetrics.CalculateCompositedSizeInCssPixels();
|
|
CSSSize compositionSize = aFrameMetrics.GetRootCompositionSize();
|
|
compositionSize =
|
|
CSSSize(std::min(compositionBounds.width, compositionSize.width),
|
|
std::min(compositionBounds.height, compositionSize.height));
|
|
CSSPoint velocity = aVelocity / aFrameMetrics.GetZoom();
|
|
CSSPoint scrollOffset = aFrameMetrics.GetScrollOffset();
|
|
CSSRect scrollableRect = aFrameMetrics.GetExpandedScrollableRect();
|
|
|
|
// Calculate the displayport size based on how fast we're moving along each axis.
|
|
CSSSize displayPortSize = CalculateDisplayPortSize(compositionSize, velocity);
|
|
|
|
if (gEnlargeDisplayPortWhenClipped) {
|
|
RedistributeDisplayPortExcess(displayPortSize, scrollableRect);
|
|
}
|
|
|
|
// Offset the displayport, depending on how fast we're moving and the
|
|
// estimated time it takes to paint, to try to minimise checkerboarding.
|
|
float estimatedPaintDurationMillis = (float)(aEstimatedPaintDuration * 1000.0);
|
|
float paintFactor = (gUsePaintDuration ? estimatedPaintDurationMillis : 50.0f);
|
|
CSSRect displayPort = CSSRect(scrollOffset + (velocity * paintFactor * gVelocityBias),
|
|
displayPortSize);
|
|
|
|
// Re-center the displayport based on its expansion over the composition size.
|
|
displayPort.MoveBy((compositionSize.width - displayPort.width)/2.0f,
|
|
(compositionSize.height - displayPort.height)/2.0f);
|
|
|
|
// Make sure the displayport remains within the scrollable rect.
|
|
displayPort = displayPort.ForceInside(scrollableRect) - scrollOffset;
|
|
|
|
APZC_LOG_FM(aFrameMetrics,
|
|
"Calculated displayport as (%f %f %f %f) from velocity (%f %f) paint time %f metrics",
|
|
displayPort.x, displayPort.y, displayPort.width, displayPort.height,
|
|
aVelocity.x, aVelocity.y, (float)estimatedPaintDurationMillis);
|
|
|
|
CSSMargin cssMargins;
|
|
cssMargins.left = -displayPort.x;
|
|
cssMargins.top = -displayPort.y;
|
|
cssMargins.right = displayPort.width - compositionSize.width - cssMargins.left;
|
|
cssMargins.bottom = displayPort.height - compositionSize.height - cssMargins.top;
|
|
|
|
LayerMargin layerMargins = cssMargins * aFrameMetrics.LayersPixelsPerCSSPixel();
|
|
|
|
return layerMargins;
|
|
}
|
|
|
|
void AsyncPanZoomController::ScheduleComposite() {
|
|
if (mCompositorParent) {
|
|
mCompositorParent->ScheduleRenderOnCompositorThread();
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::FlushRepaintForOverscrollHandoff() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
RequestContentRepaint();
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
|
|
void AsyncPanZoomController::RequestContentRepaint() {
|
|
RequestContentRepaint(mFrameMetrics);
|
|
}
|
|
|
|
void AsyncPanZoomController::RequestContentRepaint(FrameMetrics& aFrameMetrics) {
|
|
aFrameMetrics.SetDisplayPortMargins(
|
|
CalculatePendingDisplayPort(aFrameMetrics,
|
|
GetVelocityVector(),
|
|
mPaintThrottler.AverageDuration().ToSeconds()));
|
|
aFrameMetrics.SetUseDisplayPortMargins();
|
|
|
|
// If we're trying to paint what we already think is painted, discard this
|
|
// request since it's a pointless paint.
|
|
CSSRect oldDisplayPort = mLastPaintRequestMetrics.mDisplayPort
|
|
+ mLastPaintRequestMetrics.GetScrollOffset();
|
|
CSSRect newDisplayPort = aFrameMetrics.mDisplayPort
|
|
+ aFrameMetrics.GetScrollOffset();
|
|
|
|
if (fabsf(oldDisplayPort.x - newDisplayPort.x) < EPSILON &&
|
|
fabsf(oldDisplayPort.y - newDisplayPort.y) < EPSILON &&
|
|
fabsf(oldDisplayPort.width - newDisplayPort.width) < EPSILON &&
|
|
fabsf(oldDisplayPort.height - newDisplayPort.height) < EPSILON &&
|
|
fabsf(mLastPaintRequestMetrics.GetScrollOffset().x -
|
|
aFrameMetrics.GetScrollOffset().x) < EPSILON &&
|
|
fabsf(mLastPaintRequestMetrics.GetScrollOffset().y -
|
|
aFrameMetrics.GetScrollOffset().y) < EPSILON &&
|
|
aFrameMetrics.GetZoom() == mLastPaintRequestMetrics.GetZoom() &&
|
|
fabsf(aFrameMetrics.mViewport.width - mLastPaintRequestMetrics.mViewport.width) < EPSILON &&
|
|
fabsf(aFrameMetrics.mViewport.height - mLastPaintRequestMetrics.mViewport.height) < EPSILON) {
|
|
return;
|
|
}
|
|
|
|
SendAsyncScrollEvent();
|
|
mPaintThrottler.PostTask(
|
|
FROM_HERE,
|
|
NewRunnableMethod(this,
|
|
&AsyncPanZoomController::DispatchRepaintRequest,
|
|
aFrameMetrics),
|
|
GetFrameTime());
|
|
|
|
aFrameMetrics.mPresShellId = mLastContentPaintMetrics.mPresShellId;
|
|
mLastPaintRequestMetrics = aFrameMetrics;
|
|
}
|
|
|
|
void
|
|
AsyncPanZoomController::DispatchRepaintRequest(const FrameMetrics& aFrameMetrics) {
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
APZC_LOG_FM(aFrameMetrics, "%p requesting content repaint", this);
|
|
|
|
LogRendertraceRect(GetGuid(), "requested displayport", "yellow",
|
|
aFrameMetrics.mDisplayPort + aFrameMetrics.GetScrollOffset());
|
|
|
|
controller->RequestContentRepaint(aFrameMetrics);
|
|
mLastDispatchedPaintMetrics = aFrameMetrics;
|
|
}
|
|
}
|
|
|
|
void
|
|
AsyncPanZoomController::FireAsyncScrollOnTimeout()
|
|
{
|
|
if (mCurrentAsyncScrollOffset != mLastAsyncScrollOffset) {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
SendAsyncScrollEvent();
|
|
}
|
|
mAsyncScrollTimeoutTask = nullptr;
|
|
}
|
|
|
|
bool ZoomAnimation::Sample(FrameMetrics& aFrameMetrics,
|
|
const TimeDuration& aDelta) {
|
|
mDuration += aDelta;
|
|
double animPosition = mDuration / ZOOM_TO_DURATION;
|
|
|
|
if (animPosition >= 1.0) {
|
|
aFrameMetrics.SetZoom(mEndZoom);
|
|
aFrameMetrics.SetScrollOffset(mEndOffset);
|
|
return false;
|
|
}
|
|
|
|
// Sample the zoom at the current time point. The sampled zoom
|
|
// will affect the final computed resolution.
|
|
double sampledPosition = gComputedTimingFunction->GetValue(animPosition);
|
|
|
|
// We scale the scrollOffset linearly with sampledPosition, so the zoom
|
|
// needs to scale inversely to match.
|
|
aFrameMetrics.SetZoom(CSSToScreenScale(1 /
|
|
(sampledPosition / mEndZoom.scale +
|
|
(1 - sampledPosition) / mStartZoom.scale)));
|
|
|
|
aFrameMetrics.SetScrollOffset(CSSPoint::FromUnknownPoint(gfx::Point(
|
|
mEndOffset.x * sampledPosition + mStartOffset.x * (1 - sampledPosition),
|
|
mEndOffset.y * sampledPosition + mStartOffset.y * (1 - sampledPosition)
|
|
)));
|
|
|
|
return true;
|
|
}
|
|
|
|
bool AsyncPanZoomController::UpdateAnimation(const TimeStamp& aSampleTime)
|
|
{
|
|
if (mAnimation) {
|
|
if (mAnimation->Sample(mFrameMetrics, aSampleTime - mLastSampleTime)) {
|
|
if (mPaintThrottler.TimeSinceLastRequest(aSampleTime) >
|
|
mAnimation->mRepaintInterval) {
|
|
RequestContentRepaint();
|
|
}
|
|
} else {
|
|
mAnimation = nullptr;
|
|
SetState(NOTHING);
|
|
SendAsyncScrollEvent();
|
|
RequestContentRepaint();
|
|
}
|
|
UpdateSharedCompositorFrameMetrics();
|
|
mLastSampleTime = aSampleTime;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AsyncPanZoomController::SampleContentTransformForFrame(const TimeStamp& aSampleTime,
|
|
ViewTransform* aNewTransform,
|
|
ScreenPoint& aScrollOffset) {
|
|
// The eventual return value of this function. The compositor needs to know
|
|
// whether or not to advance by a frame as soon as it can. For example, if a
|
|
// fling is happening, it has to keep compositing so that the animation is
|
|
// smooth. If an animation frame is requested, it is the compositor's
|
|
// responsibility to schedule a composite.
|
|
bool requestAnimationFrame = false;
|
|
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
requestAnimationFrame = UpdateAnimation(aSampleTime);
|
|
|
|
aScrollOffset = mFrameMetrics.GetScrollOffset() * mFrameMetrics.GetZoom();
|
|
*aNewTransform = GetCurrentAsyncTransform();
|
|
|
|
LogRendertraceRect(GetGuid(), "viewport", "red",
|
|
CSSRect(mFrameMetrics.GetScrollOffset(),
|
|
ParentLayerSize(mFrameMetrics.mCompositionBounds.Size()) / mFrameMetrics.GetZoomToParent()));
|
|
|
|
mCurrentAsyncScrollOffset = mFrameMetrics.GetScrollOffset();
|
|
}
|
|
|
|
// Execute tasks queued up by mAnimation's Sample() (called by
|
|
// UpdateAnimation()) for execution after mMonitor has been released.
|
|
if (mAnimation) {
|
|
mAnimation->ExecuteDeferredTasks();
|
|
}
|
|
|
|
// Cancel the mAsyncScrollTimeoutTask because we will fire a
|
|
// mozbrowserasyncscroll event or renew the mAsyncScrollTimeoutTask again.
|
|
if (mAsyncScrollTimeoutTask) {
|
|
mAsyncScrollTimeoutTask->Cancel();
|
|
mAsyncScrollTimeoutTask = nullptr;
|
|
}
|
|
// Fire the mozbrowserasyncscroll event immediately if it's been
|
|
// sAsyncScrollThrottleTime ms since the last time we fired the event and the
|
|
// current scroll offset is different than the mLastAsyncScrollOffset we sent
|
|
// with the last event.
|
|
// Otherwise, start a timer to fire the event sAsyncScrollTimeout ms from now.
|
|
TimeDuration delta = aSampleTime - mLastAsyncScrollTime;
|
|
if (delta.ToMilliseconds() > gAsyncScrollThrottleTime &&
|
|
mCurrentAsyncScrollOffset != mLastAsyncScrollOffset) {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
mLastAsyncScrollTime = aSampleTime;
|
|
mLastAsyncScrollOffset = mCurrentAsyncScrollOffset;
|
|
SendAsyncScrollEvent();
|
|
}
|
|
else {
|
|
mAsyncScrollTimeoutTask =
|
|
NewRunnableMethod(this, &AsyncPanZoomController::FireAsyncScrollOnTimeout);
|
|
MessageLoop::current()->PostDelayedTask(FROM_HERE,
|
|
mAsyncScrollTimeoutTask,
|
|
gAsyncScrollTimeout);
|
|
}
|
|
|
|
return requestAnimationFrame;
|
|
}
|
|
|
|
ViewTransform AsyncPanZoomController::GetCurrentAsyncTransform() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
CSSPoint lastPaintScrollOffset;
|
|
if (mLastContentPaintMetrics.IsScrollable()) {
|
|
lastPaintScrollOffset = mLastContentPaintMetrics.GetScrollOffset();
|
|
}
|
|
|
|
CSSPoint currentScrollOffset = mFrameMetrics.GetScrollOffset() +
|
|
mTestAsyncScrollOffset;
|
|
|
|
// If checkerboarding has been disallowed, clamp the scroll position to stay
|
|
// within rendered content.
|
|
if (!gAllowCheckerboarding &&
|
|
!mLastContentPaintMetrics.mDisplayPort.IsEmpty()) {
|
|
CSSSize compositedSize = mLastContentPaintMetrics.CalculateCompositedSizeInCssPixels();
|
|
CSSPoint maxScrollOffset = lastPaintScrollOffset +
|
|
CSSPoint(mLastContentPaintMetrics.mDisplayPort.XMost() - compositedSize.width,
|
|
mLastContentPaintMetrics.mDisplayPort.YMost() - compositedSize.height);
|
|
CSSPoint minScrollOffset = lastPaintScrollOffset + mLastContentPaintMetrics.mDisplayPort.TopLeft();
|
|
|
|
if (minScrollOffset.x < maxScrollOffset.x) {
|
|
currentScrollOffset.x = clamped(currentScrollOffset.x, minScrollOffset.x, maxScrollOffset.x);
|
|
}
|
|
if (minScrollOffset.y < maxScrollOffset.y) {
|
|
currentScrollOffset.y = clamped(currentScrollOffset.y, minScrollOffset.y, maxScrollOffset.y);
|
|
}
|
|
}
|
|
|
|
LayerPoint translation = (currentScrollOffset - lastPaintScrollOffset)
|
|
* mLastContentPaintMetrics.LayersPixelsPerCSSPixel();
|
|
|
|
return ViewTransform(-translation,
|
|
mFrameMetrics.GetZoom()
|
|
/ mLastContentPaintMetrics.mDevPixelsPerCSSPixel
|
|
/ mFrameMetrics.GetParentResolution());
|
|
}
|
|
|
|
gfx3DMatrix AsyncPanZoomController::GetNontransientAsyncTransform() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
return gfx3DMatrix::ScalingMatrix(mLastContentPaintMetrics.mResolution.scale,
|
|
mLastContentPaintMetrics.mResolution.scale,
|
|
1.0f);
|
|
}
|
|
|
|
gfx3DMatrix AsyncPanZoomController::GetTransformToLastDispatchedPaint() {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
LayerPoint scrollChange = (mLastContentPaintMetrics.GetScrollOffset() - mLastDispatchedPaintMetrics.GetScrollOffset())
|
|
* mLastContentPaintMetrics.LayersPixelsPerCSSPixel();
|
|
float zoomChange = mLastContentPaintMetrics.GetZoom().scale / mLastDispatchedPaintMetrics.GetZoom().scale;
|
|
return gfx3DMatrix::Translation(scrollChange.x, scrollChange.y, 0) *
|
|
gfx3DMatrix::ScalingMatrix(zoomChange, zoomChange, 1);
|
|
}
|
|
|
|
void AsyncPanZoomController::NotifyLayersUpdated(const FrameMetrics& aLayerMetrics, bool aIsFirstPaint) {
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
mLastContentPaintMetrics = aLayerMetrics;
|
|
UpdateTransformScale();
|
|
|
|
bool isDefault = mFrameMetrics.IsDefault();
|
|
mFrameMetrics.mMayHaveTouchListeners = aLayerMetrics.mMayHaveTouchListeners;
|
|
APZC_LOG_FM(aLayerMetrics, "%p got a NotifyLayersUpdated with aIsFirstPaint=%d", this, aIsFirstPaint);
|
|
|
|
LogRendertraceRect(GetGuid(), "page", "brown", aLayerMetrics.mScrollableRect);
|
|
LogRendertraceRect(GetGuid(), "painted displayport", "green",
|
|
aLayerMetrics.mDisplayPort + aLayerMetrics.GetScrollOffset());
|
|
|
|
mPaintThrottler.TaskComplete(GetFrameTime());
|
|
bool needContentRepaint = false;
|
|
if (aLayerMetrics.mCompositionBounds.width == mFrameMetrics.mCompositionBounds.width &&
|
|
aLayerMetrics.mCompositionBounds.height == mFrameMetrics.mCompositionBounds.height) {
|
|
// Remote content has sync'd up to the composition geometry
|
|
// change, so we can accept the viewport it's calculated.
|
|
if (mFrameMetrics.mViewport.width != aLayerMetrics.mViewport.width ||
|
|
mFrameMetrics.mViewport.height != aLayerMetrics.mViewport.height) {
|
|
needContentRepaint = true;
|
|
}
|
|
mFrameMetrics.mViewport = aLayerMetrics.mViewport;
|
|
}
|
|
|
|
// If the layers update was not triggered by our own repaint request, then
|
|
// we want to take the new scroll offset. Check the scroll generation as well
|
|
// to filter duplicate calls to NotifyLayersUpdated with the same scroll offset
|
|
// update message.
|
|
bool scrollOffsetUpdated = aLayerMetrics.GetScrollOffsetUpdated()
|
|
&& (aLayerMetrics.GetScrollGeneration() != mFrameMetrics.GetScrollGeneration());
|
|
|
|
if (aIsFirstPaint || isDefault) {
|
|
// Initialize our internal state to something sane when the content
|
|
// that was just painted is something we knew nothing about previously
|
|
mPaintThrottler.ClearHistory();
|
|
mPaintThrottler.SetMaxDurations(gNumPaintDurationSamples);
|
|
|
|
mX.CancelTouch();
|
|
mY.CancelTouch();
|
|
SetState(NOTHING);
|
|
|
|
mFrameMetrics = aLayerMetrics;
|
|
mLastDispatchedPaintMetrics = aLayerMetrics;
|
|
ShareCompositorFrameMetrics();
|
|
} else {
|
|
// If we're not taking the aLayerMetrics wholesale we still need to pull
|
|
// in some things into our local mFrameMetrics because these things are
|
|
// determined by Gecko and our copy in mFrameMetrics may be stale.
|
|
|
|
if (mFrameMetrics.mCompositionBounds.width == aLayerMetrics.mCompositionBounds.width &&
|
|
mFrameMetrics.mDevPixelsPerCSSPixel == aLayerMetrics.mDevPixelsPerCSSPixel) {
|
|
float parentResolutionChange = aLayerMetrics.GetParentResolution().scale
|
|
/ mFrameMetrics.GetParentResolution().scale;
|
|
mFrameMetrics.ZoomBy(parentResolutionChange);
|
|
} else {
|
|
// Take the new zoom as either device scale or composition width or both
|
|
// got changed (e.g. due to orientation change).
|
|
mFrameMetrics.SetZoom(aLayerMetrics.GetZoom());
|
|
mFrameMetrics.mDevPixelsPerCSSPixel.scale = aLayerMetrics.mDevPixelsPerCSSPixel.scale;
|
|
}
|
|
mFrameMetrics.mScrollableRect = aLayerMetrics.mScrollableRect;
|
|
mFrameMetrics.mCompositionBounds = aLayerMetrics.mCompositionBounds;
|
|
mFrameMetrics.SetRootCompositionSize(aLayerMetrics.GetRootCompositionSize());
|
|
mFrameMetrics.mResolution = aLayerMetrics.mResolution;
|
|
mFrameMetrics.mCumulativeResolution = aLayerMetrics.mCumulativeResolution;
|
|
mFrameMetrics.mHasScrollgrab = aLayerMetrics.mHasScrollgrab;
|
|
|
|
if (scrollOffsetUpdated) {
|
|
APZC_LOG("%p updating scroll offset from (%f, %f) to (%f, %f)\n", this,
|
|
mFrameMetrics.GetScrollOffset().x, mFrameMetrics.GetScrollOffset().y,
|
|
aLayerMetrics.GetScrollOffset().x, aLayerMetrics.GetScrollOffset().y);
|
|
|
|
mFrameMetrics.CopyScrollInfoFrom(aLayerMetrics);
|
|
|
|
// Because of the scroll offset update, any inflight paint requests are
|
|
// going to be ignored by layout, and so mLastDispatchedPaintMetrics
|
|
// becomes incorrect for the purposes of calculating the LD transform. To
|
|
// correct this we need to update mLastDispatchedPaintMetrics to be the
|
|
// last thing we know was painted by Gecko.
|
|
mLastDispatchedPaintMetrics = aLayerMetrics;
|
|
}
|
|
}
|
|
|
|
if (scrollOffsetUpdated) {
|
|
// Once layout issues a scroll offset update, it becomes impervious to
|
|
// scroll offset updates from APZ until we acknowledge the update it sent.
|
|
// This prevents APZ updates from clobbering scroll updates from other
|
|
// more "legitimate" sources like content scripts.
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
APZC_LOG("%p sending scroll update acknowledgement with gen %lu\n", this, aLayerMetrics.GetScrollGeneration());
|
|
controller->AcknowledgeScrollUpdate(aLayerMetrics.GetScrollId(),
|
|
aLayerMetrics.GetScrollGeneration());
|
|
}
|
|
}
|
|
|
|
if (needContentRepaint) {
|
|
RequestContentRepaint();
|
|
}
|
|
UpdateSharedCompositorFrameMetrics();
|
|
}
|
|
|
|
const FrameMetrics& AsyncPanZoomController::GetFrameMetrics() {
|
|
mMonitor.AssertCurrentThreadIn();
|
|
return mFrameMetrics;
|
|
}
|
|
|
|
void AsyncPanZoomController::ZoomToRect(CSSRect aRect) {
|
|
if (!aRect.IsFinite()) {
|
|
NS_WARNING("ZoomToRect got called with a non-finite rect; ignoring...\n");
|
|
return;
|
|
}
|
|
|
|
SetState(ANIMATING_ZOOM);
|
|
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
ParentLayerIntRect compositionBounds = mFrameMetrics.mCompositionBounds;
|
|
CSSRect cssPageRect = mFrameMetrics.mScrollableRect;
|
|
CSSPoint scrollOffset = mFrameMetrics.GetScrollOffset();
|
|
CSSToParentLayerScale currentZoom = mFrameMetrics.GetZoomToParent();
|
|
CSSToParentLayerScale targetZoom;
|
|
|
|
// The minimum zoom to prevent over-zoom-out.
|
|
// If the zoom factor is lower than this (i.e. we are zoomed more into the page),
|
|
// then the CSS content rect, in layers pixels, will be smaller than the
|
|
// composition bounds. If this happens, we can't fill the target composited
|
|
// area with this frame.
|
|
CSSToParentLayerScale localMinZoom(std::max((mZoomConstraints.mMinZoom * mFrameMetrics.mTransformScale).scale,
|
|
std::max(compositionBounds.width / cssPageRect.width,
|
|
compositionBounds.height / cssPageRect.height)));
|
|
CSSToParentLayerScale localMaxZoom = mZoomConstraints.mMaxZoom * mFrameMetrics.mTransformScale;
|
|
|
|
if (!aRect.IsEmpty()) {
|
|
// Intersect the zoom-to-rect to the CSS rect to make sure it fits.
|
|
aRect = aRect.Intersect(cssPageRect);
|
|
targetZoom = CSSToParentLayerScale(std::min(compositionBounds.width / aRect.width,
|
|
compositionBounds.height / aRect.height));
|
|
}
|
|
// 1. If the rect is empty, request received from browserElementScrolling.js
|
|
// 2. currentZoom is equal to mZoomConstraints.mMaxZoom and user still double-tapping it
|
|
// 3. currentZoom is equal to localMinZoom and user still double-tapping it
|
|
// Treat these three cases as a request to zoom out as much as possible.
|
|
if (aRect.IsEmpty() ||
|
|
(currentZoom == localMaxZoom && targetZoom >= localMaxZoom) ||
|
|
(currentZoom == localMinZoom && targetZoom <= localMinZoom)) {
|
|
CSSSize compositedSize = mFrameMetrics.CalculateCompositedSizeInCssPixels();
|
|
float y = scrollOffset.y;
|
|
float newHeight =
|
|
cssPageRect.width * (compositedSize.height / compositedSize.width);
|
|
float dh = compositedSize.height - newHeight;
|
|
|
|
aRect = CSSRect(0.0f,
|
|
y + dh/2,
|
|
cssPageRect.width,
|
|
newHeight);
|
|
aRect = aRect.Intersect(cssPageRect);
|
|
targetZoom = CSSToParentLayerScale(std::min(compositionBounds.width / aRect.width,
|
|
compositionBounds.height / aRect.height));
|
|
}
|
|
|
|
targetZoom.scale = clamped(targetZoom.scale, localMinZoom.scale, localMaxZoom.scale);
|
|
FrameMetrics endZoomToMetrics = mFrameMetrics;
|
|
endZoomToMetrics.SetZoom(targetZoom / mFrameMetrics.mTransformScale);
|
|
|
|
// Adjust the zoomToRect to a sensible position to prevent overscrolling.
|
|
CSSSize sizeAfterZoom = endZoomToMetrics.CalculateCompositedSizeInCssPixels();
|
|
|
|
// If either of these conditions are met, the page will be
|
|
// overscrolled after zoomed
|
|
if (aRect.y + sizeAfterZoom.height > cssPageRect.height) {
|
|
aRect.y = cssPageRect.height - sizeAfterZoom.height;
|
|
aRect.y = aRect.y > 0 ? aRect.y : 0;
|
|
}
|
|
if (aRect.x + sizeAfterZoom.width > cssPageRect.width) {
|
|
aRect.x = cssPageRect.width - sizeAfterZoom.width;
|
|
aRect.x = aRect.x > 0 ? aRect.x : 0;
|
|
}
|
|
|
|
endZoomToMetrics.SetScrollOffset(aRect.TopLeft());
|
|
endZoomToMetrics.SetDisplayPortMargins(
|
|
CalculatePendingDisplayPort(endZoomToMetrics,
|
|
ScreenPoint(0,0),
|
|
0));
|
|
endZoomToMetrics.SetUseDisplayPortMargins();
|
|
|
|
StartAnimation(new ZoomAnimation(
|
|
mFrameMetrics.GetScrollOffset(),
|
|
mFrameMetrics.GetZoom(),
|
|
endZoomToMetrics.GetScrollOffset(),
|
|
endZoomToMetrics.GetZoom()));
|
|
|
|
// Schedule a repaint now, so the new displayport will be painted before the
|
|
// animation finishes.
|
|
RequestContentRepaint(endZoomToMetrics);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::ContentReceivedTouch(bool aPreventDefault) {
|
|
mPreventDefaultSet = true;
|
|
mPreventDefault = aPreventDefault;
|
|
CheckContentResponse();
|
|
}
|
|
|
|
void AsyncPanZoomController::CheckContentResponse() {
|
|
bool canProceedToTouchState = true;
|
|
|
|
if (mFrameMetrics.mMayHaveTouchListeners) {
|
|
canProceedToTouchState &= mPreventDefaultSet;
|
|
}
|
|
|
|
if (mTouchActionPropertyEnabled) {
|
|
canProceedToTouchState &= mAllowedTouchBehaviorSet;
|
|
}
|
|
|
|
if (!canProceedToTouchState) {
|
|
return;
|
|
}
|
|
|
|
if (mContentResponseTimeoutTask) {
|
|
mContentResponseTimeoutTask->Cancel();
|
|
mContentResponseTimeoutTask = nullptr;
|
|
}
|
|
|
|
if (mState == WAITING_CONTENT_RESPONSE) {
|
|
if (!mPreventDefault) {
|
|
SetState(NOTHING);
|
|
}
|
|
|
|
mHandlingTouchQueue = true;
|
|
|
|
while (!mTouchQueue.IsEmpty()) {
|
|
if (!mPreventDefault) {
|
|
HandleInputEvent(mTouchQueue[0]);
|
|
}
|
|
|
|
if (mTouchQueue[0].mType == MultiTouchInput::MULTITOUCH_END ||
|
|
mTouchQueue[0].mType == MultiTouchInput::MULTITOUCH_CANCEL) {
|
|
mTouchQueue.RemoveElementAt(0);
|
|
break;
|
|
}
|
|
|
|
mTouchQueue.RemoveElementAt(0);
|
|
}
|
|
|
|
mHandlingTouchQueue = false;
|
|
}
|
|
}
|
|
|
|
bool AsyncPanZoomController::TouchActionAllowZoom() {
|
|
if (!mTouchActionPropertyEnabled) {
|
|
return true;
|
|
}
|
|
|
|
// Pointer events specification implies all touch points to allow zoom
|
|
// to perform it.
|
|
for (size_t i = 0; i < mAllowedTouchBehaviors.Length(); i++) {
|
|
if (!(mAllowedTouchBehaviors[i] & AllowedTouchBehavior::ZOOM)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
AsyncPanZoomController::TouchBehaviorFlags
|
|
AsyncPanZoomController::GetTouchBehavior(uint32_t touchIndex) {
|
|
if (touchIndex < mAllowedTouchBehaviors.Length()) {
|
|
return mAllowedTouchBehaviors[touchIndex];
|
|
}
|
|
return DefaultTouchBehavior;
|
|
}
|
|
|
|
AsyncPanZoomController::TouchBehaviorFlags
|
|
AsyncPanZoomController::GetAllowedTouchBehavior(ScreenIntPoint& aPoint) {
|
|
// Here we need to perform a hit testing over the touch-action regions attached to the
|
|
// layer associated with current apzc.
|
|
// Currently they are in progress, for more info see bug 928833.
|
|
return AllowedTouchBehavior::UNKNOWN;
|
|
}
|
|
|
|
void AsyncPanZoomController::SetAllowedTouchBehavior(const nsTArray<TouchBehaviorFlags>& aBehaviors) {
|
|
mAllowedTouchBehaviors.Clear();
|
|
mAllowedTouchBehaviors.AppendElements(aBehaviors);
|
|
mAllowedTouchBehaviorSet = true;
|
|
CheckContentResponse();
|
|
}
|
|
|
|
void AsyncPanZoomController::SetState(PanZoomState aNewState) {
|
|
|
|
PanZoomState oldState;
|
|
|
|
// Intentional scoping for mutex
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
oldState = mState;
|
|
mState = aNewState;
|
|
}
|
|
|
|
if (mGeckoContentController) {
|
|
if (!IsTransformingState(oldState) && IsTransformingState(aNewState)) {
|
|
mGeckoContentController->NotifyTransformBegin(
|
|
ScrollableLayerGuid(mLayersId, mFrameMetrics.mPresShellId, mFrameMetrics.GetScrollId()));
|
|
} else if (IsTransformingState(oldState) && !IsTransformingState(aNewState)) {
|
|
mGeckoContentController->NotifyTransformEnd(
|
|
ScrollableLayerGuid(mLayersId, mFrameMetrics.mPresShellId, mFrameMetrics.GetScrollId()));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool AsyncPanZoomController::IsTransformingState(PanZoomState aState) {
|
|
return !(aState == NOTHING || aState == TOUCHING || aState == WAITING_CONTENT_RESPONSE);
|
|
}
|
|
|
|
bool AsyncPanZoomController::IsPanningState(PanZoomState aState) {
|
|
return (aState == PANNING || aState == PANNING_LOCKED_X || aState == PANNING_LOCKED_Y);
|
|
}
|
|
|
|
void AsyncPanZoomController::SetContentResponseTimer() {
|
|
if (!mContentResponseTimeoutTask) {
|
|
mContentResponseTimeoutTask =
|
|
NewRunnableMethod(this, &AsyncPanZoomController::TimeoutContentResponse);
|
|
|
|
PostDelayedTask(mContentResponseTimeoutTask, gContentResponseTimeout);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::TimeoutContentResponse() {
|
|
mContentResponseTimeoutTask = nullptr;
|
|
ContentReceivedTouch(false);
|
|
}
|
|
|
|
void AsyncPanZoomController::UpdateZoomConstraints(const ZoomConstraints& aConstraints) {
|
|
APZC_LOG("%p updating zoom constraints to %d %d %f %f\n", this, aConstraints.mAllowZoom,
|
|
aConstraints.mAllowDoubleTapZoom, aConstraints.mMinZoom.scale, aConstraints.mMaxZoom.scale);
|
|
if (IsNaN(aConstraints.mMinZoom.scale) || IsNaN(aConstraints.mMaxZoom.scale)) {
|
|
NS_WARNING("APZC received zoom constraints with NaN values; dropping...\n");
|
|
return;
|
|
}
|
|
// inf float values and other bad cases should be sanitized by the code below.
|
|
mZoomConstraints.mAllowZoom = aConstraints.mAllowZoom;
|
|
mZoomConstraints.mAllowDoubleTapZoom = aConstraints.mAllowDoubleTapZoom;
|
|
mZoomConstraints.mMinZoom = (MIN_ZOOM > aConstraints.mMinZoom ? MIN_ZOOM : aConstraints.mMinZoom);
|
|
mZoomConstraints.mMaxZoom = (MAX_ZOOM > aConstraints.mMaxZoom ? aConstraints.mMaxZoom : MAX_ZOOM);
|
|
if (mZoomConstraints.mMaxZoom < mZoomConstraints.mMinZoom) {
|
|
mZoomConstraints.mMaxZoom = mZoomConstraints.mMinZoom;
|
|
}
|
|
}
|
|
|
|
ZoomConstraints
|
|
AsyncPanZoomController::GetZoomConstraints() const
|
|
{
|
|
return mZoomConstraints;
|
|
}
|
|
|
|
|
|
void AsyncPanZoomController::PostDelayedTask(Task* aTask, int aDelayMs) {
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (controller) {
|
|
controller->PostDelayedTask(aTask, aDelayMs);
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::SendAsyncScrollEvent() {
|
|
nsRefPtr<GeckoContentController> controller = GetGeckoContentController();
|
|
if (!controller) {
|
|
return;
|
|
}
|
|
|
|
bool isRoot;
|
|
CSSRect contentRect;
|
|
CSSSize scrollableSize;
|
|
{
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
|
|
isRoot = mFrameMetrics.mIsRoot;
|
|
scrollableSize = mFrameMetrics.mScrollableRect.Size();
|
|
contentRect = mFrameMetrics.CalculateCompositedRectInCssPixels();
|
|
contentRect.MoveTo(mCurrentAsyncScrollOffset);
|
|
}
|
|
|
|
controller->SendAsyncScrollDOMEvent(isRoot, contentRect, scrollableSize);
|
|
}
|
|
|
|
bool AsyncPanZoomController::Matches(const ScrollableLayerGuid& aGuid)
|
|
{
|
|
return aGuid == GetGuid();
|
|
}
|
|
|
|
void AsyncPanZoomController::GetGuid(ScrollableLayerGuid* aGuidOut)
|
|
{
|
|
if (aGuidOut) {
|
|
*aGuidOut = GetGuid();
|
|
}
|
|
}
|
|
|
|
ScrollableLayerGuid AsyncPanZoomController::GetGuid()
|
|
{
|
|
return ScrollableLayerGuid(mLayersId, mFrameMetrics);
|
|
}
|
|
|
|
void AsyncPanZoomController::UpdateSharedCompositorFrameMetrics()
|
|
{
|
|
mMonitor.AssertCurrentThreadIn();
|
|
|
|
FrameMetrics* frame = mSharedFrameMetricsBuffer ?
|
|
static_cast<FrameMetrics*>(mSharedFrameMetricsBuffer->memory()) : nullptr;
|
|
|
|
if (frame && mSharedLock && gfxPrefs::UseProgressiveTilePainting()) {
|
|
mSharedLock->Lock();
|
|
*frame = mFrameMetrics;
|
|
mSharedLock->Unlock();
|
|
}
|
|
}
|
|
|
|
void AsyncPanZoomController::ShareCompositorFrameMetrics() {
|
|
|
|
PCompositorParent* compositor =
|
|
(mCrossProcessCompositorParent ? mCrossProcessCompositorParent : mCompositorParent.get());
|
|
|
|
// Only create the shared memory buffer if it hasn't already been created,
|
|
// we are using progressive tile painting, and we have a
|
|
// compositor to pass the shared memory back to the content process/thread.
|
|
if (!mSharedFrameMetricsBuffer && compositor && gfxPrefs::UseProgressiveTilePainting()) {
|
|
|
|
// Create shared memory and initialize it with the current FrameMetrics value
|
|
mSharedFrameMetricsBuffer = new ipc::SharedMemoryBasic;
|
|
FrameMetrics* frame = nullptr;
|
|
mSharedFrameMetricsBuffer->Create(sizeof(FrameMetrics));
|
|
mSharedFrameMetricsBuffer->Map(sizeof(FrameMetrics));
|
|
frame = static_cast<FrameMetrics*>(mSharedFrameMetricsBuffer->memory());
|
|
|
|
if (frame) {
|
|
|
|
{ // scope the monitor, only needed to copy the FrameMetrics.
|
|
ReentrantMonitorAutoEnter lock(mMonitor);
|
|
*frame = mFrameMetrics;
|
|
}
|
|
|
|
// Get the process id of the content process
|
|
base::ProcessHandle processHandle = compositor->OtherProcess();
|
|
ipc::SharedMemoryBasic::Handle mem = ipc::SharedMemoryBasic::NULLHandle();
|
|
|
|
// Get the shared memory handle to share with the content process
|
|
mSharedFrameMetricsBuffer->ShareToProcess(processHandle, &mem);
|
|
|
|
// Get the cross process mutex handle to share with the content process
|
|
mSharedLock = new CrossProcessMutex("AsyncPanZoomControlLock");
|
|
CrossProcessMutexHandle handle = mSharedLock->ShareToProcess(processHandle);
|
|
|
|
// Send the shared memory handle and cross process handle to the content
|
|
// process by an asynchronous ipc call. Include the APZC unique ID
|
|
// so the content process know which APZC sent this shared FrameMetrics.
|
|
if (!compositor->SendSharedCompositorFrameMetrics(mem, handle, mAPZCId)) {
|
|
APZC_LOG("%p failed to share FrameMetrics with content process.", this);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ParentLayerPoint AsyncPanZoomController::ToParentLayerCoords(const ScreenPoint& aPoint)
|
|
{
|
|
return TransformTo<ParentLayerPixel>(GetNontransientAsyncTransform() * GetCSSTransform(), aPoint);
|
|
}
|
|
|
|
void AsyncPanZoomController::UpdateTransformScale()
|
|
{
|
|
gfx3DMatrix nontransientTransforms = GetNontransientAsyncTransform() * GetCSSTransform();
|
|
if (!FuzzyEqualsMultiplicative(nontransientTransforms.GetXScale(), nontransientTransforms.GetYScale())) {
|
|
NS_WARNING("The x- and y-scales of the nontransient transforms should be equal");
|
|
}
|
|
mFrameMetrics.mTransformScale.scale = nontransientTransforms.GetXScale();
|
|
}
|
|
|
|
}
|
|
}
|