Attachment 371144 Details for Bug 198462 – Patch

[patch] Patch

bug-198462-20190602134142.patch (text/plain), 66.66 KB, created by Antoine Quint on 2019-06-02 04:41:44 PDT

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Creator: Antoine Quint

Created: 2019-06-02 04:41:44 PDT

Size: 66.66 KB

patch

obsolete

>Subversion Revision: 246020
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 196d2609c9e3d7207ffa92d1da2ea763f36a2105..ef1f5b725183ece1dae438fadf47b0e861e49baa 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,59 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Pointer events differ from mouse events in that pressing a button on a mouse and then pressing a second button
>+        would yield two "mousedown" events but a single "pointerdown" event, for the first time we're transitioning from
>+        a state where no button is pressed at all, and then a "pointermove" event to indicate an additional button has been
>+        pressed. This is what the Pointer Events specification calls "chorded button interactions".
>+        See https://w3c.github.io/pointerevents/#chorded-button-interactions for the full details.
>+
>+        To implement this, we no longer directly call PointerEvent::create() from Element::dispatchMouseEvent() but instead
>+        call the new PointerCaptureController::pointerEventForMouseEvent() which implements the required logic to determine
>+        for "mousedown" and "mouseup" mouse events, if we're transitioning from or to a state where no button is pressed at
>+        all.
>+
>+        While that basic change is pretty small, a wider change was required to report the correct value for a PointerEvents'
>+        "button" property which should return "-1" when there is no change in pressed button state compared to any previous
>+        pointer event.
>+
>+        Up until now, MouseEvent.button was an "unsigned short", as specified up to and including DOM Level 2 Events. But the
>+        UI Events spec says that property is a "short", and PointerEvent is the only interface where a "-1" value is used. This
>+        required some changes throughout our codebase since we used a "-1" value to specify that no button was pressed when dealing
>+        with NSEvent input and going through PlatformMouseEvent and eventually MouseEvent. So now we change the various NoButton
>+        enum values to be "-2" and use that value, which is not going to be used for any mouse button, as the value reflected as
>+        "0" through MouseEvent.button, as specified by UI Events.
>+
>+        Furthermore, we identified another issue: MouseEvent.buttons would always return 0 in DRT and WKTR. We rely upon that
>+        value in PointerCaptureController::pointerEventForMouseEvent() and so we had to make that work for the relevant WPT test,
>+        web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover.html, to pass and show a correct implementation
>+        of chorded button interactions. The details of the work required for this is in Tools/ChangeLog.
>+
>+        * dom/Element.cpp:
>+        (WebCore::Element::dispatchMouseEvent):
>+        * dom/MouseEvent.cpp:
>+        (WebCore::MouseEvent::create):
>+        (WebCore::MouseEvent::MouseEvent):
>+        (WebCore::MouseEvent::initMouseEvent):
>+        (WebCore::MouseEvent::initMouseEventQuirk):
>+        * dom/MouseEvent.h:
>+        (WebCore::MouseEvent::button const):
>+        * dom/MouseEvent.idl:
>+        * dom/MouseEventInit.h:
>+        * dom/MouseEventInit.idl:
>+        * dom/PointerEvent.cpp:
>+        (WebCore::PointerEvent::create):
>+        (WebCore::PointerEvent::PointerEvent):
>+        * dom/PointerEvent.h:
>+        * loader/NavigationAction.h:
>+        * page/PointerCaptureController.cpp:
>+        (WebCore::PointerCaptureController::pointerEventForMouseEvent):
>+        * page/PointerCaptureController.h:
>+        * platform/PlatformMouseEvent.h:
>+
> 2019-06-01  Simon Fraser  <simon.fraser@apple.com>
> 
>         [Async overflow scroll] Flashing content when scrolling async overflow with a negative z-index child
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index d71b83781a55cc407badc059ad8b033e40b34a09..d7b09961ad516ae1b0cb64ebf1a6857f97372b2d 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,15 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Update to use -2 instead of -1 for NoButton.
>+
>+        * Shared/API/c/WKEvent.h:
>+        * Shared/WebEvent.h:
>+
> 2019-06-01  Konstantin Tokarev  <annulen@yandex.ru>
> 
>         Remove include directives unused since r245186
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index c36a5f965cb416892025b33f666d08c1ec0e19ae..7f6145b63d2f40ec25291277fddeda15027f2f8a 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,18 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Update -[DOMMouseEvent button] to be a "short" and update the noButton value from -1 to -2.
>+
>+        * DOM/DOMMouseEvent.h:
>+        * DOM/DOMMouseEvent.mm:
>+        (-[DOMMouseEvent button]):
>+        * WebView/WebPDFView.mm:
>+        (-[WebPDFView PDFViewWillClickOnLink:withURL:]):
>+
> 2019-06-01  Andy Estes  <aestes@apple.com>
> 
>         [Apple Pay] Every PaymentCoordinator client should explicitly decide whether they support unrestricted Apple Pay
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index 385e2223e0f3efc06163985b9a07e12909aa25ab..b1090d93041457cd3a196e8931ca42a625c8ec50 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -314,25 +314,24 @@ bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const
> 
> #if ENABLE(POINTER_EVENTS)
>     if (RuntimeEnabledFeatures::sharedFeatures().pointerEventsEnabled()) {
>-#if ENABLE(TOUCH_EVENTS)
>         if (auto* page = document().page()) {
>-            if (mouseEvent->type() != eventNames().clickEvent && page->pointerCaptureController().preventsCompatibilityMouseEventsForIdentifier(platformEvent.pointerId()))
>+            auto& pointerCaptureController = page->pointerCaptureController();
>+#if ENABLE(TOUCH_EVENTS)
>+            if (mouseEvent->type() != eventNames().clickEvent && pointerCaptureController.preventsCompatibilityMouseEventsForIdentifier(platformEvent.pointerId()))
>                 return false;
>-        }
> #else
>-        if (auto pointerEvent = PointerEvent::create(mouseEvent)) {
>-            if (auto* page = document().page()) {
>-                page->pointerCaptureController().dispatchEvent(*pointerEvent, this);
>-                if (isCompatibilityMouseEvent(mouseEvent) && page->pointerCaptureController().preventsCompatibilityMouseEventsForIdentifier(pointerEvent->pointerId()))
>-                    return false;
>-            }
>-            if (pointerEvent->defaultPrevented() || pointerEvent->defaultHandled()) {
>-                didNotSwallowEvent = false;
>-                if (pointerEvent->type() == eventNames().pointerdownEvent)
>+            if (auto pointerEvent = pointerCaptureController.pointerEventForMouseEvent(mouseEvent)) {
>+                pointerCaptureController.dispatchEvent(*pointerEvent, this);
>+                if (isCompatibilityMouseEvent(mouseEvent) && pointerCaptureController.preventsCompatibilityMouseEventsForIdentifier(pointerEvent->pointerId()))
>                     return false;
>+                if (pointerEvent->defaultPrevented() || pointerEvent->defaultHandled()) {
>+                    didNotSwallowEvent = false;
>+                    if (pointerEvent->type() == eventNames().pointerdownEvent)
>+                        return false;
>+                }
>             }
>-        }
> #endif
>+        }
>     }
> #endif
> 
>diff --git a/Source/WebCore/dom/MouseEvent.cpp b/Source/WebCore/dom/MouseEvent.cpp
>index 2091a1a55db28a34a839dab9e2d55f24d7a76453..f2516f75ecdabf672025bb190904fdef247ab844 100644
>--- a/Source/WebCore/dom/MouseEvent.cpp
>+++ b/Source/WebCore/dom/MouseEvent.cpp
>@@ -62,7 +62,7 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, RefPtr<WindowP
> }
> 
> Ref<MouseEvent> MouseEvent::create(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
>-    const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, unsigned short button, unsigned short buttons,
>+    const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
>     EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, IsSimulated isSimulated, IsTrusted isTrusted)
> {
>     return adoptRef(*new MouseEvent(type, canBubble, isCancelable, isComposed, timestamp, WTFMove(view), detail,
>@@ -70,7 +70,7 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& type, CanBubble canBubble
> }
> 
> Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, RefPtr<WindowProxy>&& view, int detail,
>-    int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier> modifiers, unsigned short button, unsigned short buttons,
>+    int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
>     unsigned short syntheticClickType, EventTarget* relatedTarget)
> {
>     return adoptRef(*new MouseEvent(eventType, canBubble, isCancelable, isComposed, WTFMove(view), detail, { screenX, screenY }, { clientX, clientY }, modifiers, button, buttons, syntheticClickType, relatedTarget));
>@@ -80,13 +80,13 @@ MouseEvent::MouseEvent() = default;
> 
> MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
>     MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail,
>-    const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, unsigned short button, unsigned short buttons,
>+    const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier> modifiers, short button, unsigned short buttons,
>     EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, IsSimulated isSimulated, IsTrusted isTrusted)
>     : MouseRelatedEvent(eventType, canBubble, isCancelable, isComposed, timestamp, WTFMove(view), detail, screenLocation, windowLocation, movementDelta, modifiers, isSimulated, isTrusted)
>-    , m_button(button == (unsigned short)-1 ? 0 : button)
>+    , m_button(button == -2 ? 0 : button)
>     , m_buttons(buttons)
>-    , m_syntheticClickType(button == (unsigned short)-1 ? 0 : syntheticClickType)
>-    , m_buttonDown(button != (unsigned short)-1)
>+    , m_syntheticClickType(button == -2 ? 0 : syntheticClickType)
>+    , m_buttonDown(button != -2)
>     , m_relatedTarget(relatedTarget)
>     , m_force(force)
>     , m_dataTransfer(dataTransfer)
>@@ -95,12 +95,12 @@ MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCan
> 
> MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed,
>     RefPtr<WindowProxy>&& view, int detail, const IntPoint& screenLocation, const IntPoint& clientLocation,
>-    OptionSet<Modifier> modifiers, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
>+    OptionSet<Modifier> modifiers, short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
>     : MouseRelatedEvent(eventType, canBubble, isCancelable, isComposed, MonotonicTime::now(), WTFMove(view), detail, screenLocation, { }, { }, modifiers, IsSimulated::No)
>-    , m_button(button == (unsigned short)-1 ? 0 : button)
>+    , m_button(button == -2 ? 0 : button)
>     , m_buttons(buttons)
>-    , m_syntheticClickType(button == (unsigned short)-1 ? 0 : syntheticClickType)
>-    , m_buttonDown(button != (unsigned short)-1)
>+    , m_syntheticClickType(button == -2 ? 0 : syntheticClickType)
>+    , m_buttonDown(button != -2)
>     , m_relatedTarget(relatedTarget)
> {
>     initCoordinates(clientLocation);
>@@ -108,9 +108,9 @@ MouseEvent::MouseEvent(const AtomicString& eventType, CanBubble canBubble, IsCan
> 
> MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& initializer)
>     : MouseRelatedEvent(eventType, initializer)
>-    , m_button(initializer.button == (unsigned short)-1 ? 0 : initializer.button)
>+    , m_button(initializer.button == -2 ? 0 : initializer.button)
>     , m_buttons(initializer.buttons)
>-    , m_buttonDown(initializer.button != (unsigned short)-1)
>+    , m_buttonDown(initializer.button != -2)
>     , m_relatedTarget(initializer.relatedTarget)
> {
>     initCoordinates({ initializer.clientX, initializer.clientY });
>@@ -119,7 +119,7 @@ MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& init
> MouseEvent::~MouseEvent() = default;
> 
> void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail,
>-    int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, EventTarget* relatedTarget)
>+    int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, EventTarget* relatedTarget)
> {
>     if (isBeingDispatched())
>         return;
>@@ -128,9 +128,9 @@ void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool c
> 
>     m_screenLocation = IntPoint(screenX, screenY);
>     setModifierKeys(ctrlKey, altKey, shiftKey, metaKey);
>-    m_button = button == (unsigned short)-1 ? 0 : button;
>+    m_button = button == -2 ? 0 : button;
>     m_syntheticClickType = 0;
>-    m_buttonDown = button != (unsigned short)-1;
>+    m_buttonDown = button != -2;
>     m_relatedTarget = relatedTarget;
> 
>     initCoordinates(IntPoint(clientX, clientY));
>@@ -141,7 +141,7 @@ void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool c
> 
> // FIXME: We need this quirk because iAd Producer is calling this function with a relatedTarget that is not an EventTarget (rdar://problem/30640101).
> // We should remove this quirk when possible.
>-void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, JSValue relatedTargetValue)
>+void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, JSValue relatedTargetValue)
> {
>     EventTarget* relatedTarget = nullptr;
> #if PLATFORM(MAC)
>diff --git a/Source/WebCore/dom/MouseEvent.h b/Source/WebCore/dom/MouseEvent.h
>index 719a41c7c634e13caaa41b9892213fbc275cd608..cf8200d72e3d813960c54939d932ad623e85ae5f 100644
>--- a/Source/WebCore/dom/MouseEvent.h
>+++ b/Source/WebCore/dom/MouseEvent.h
>@@ -40,13 +40,13 @@ class PlatformMouseEvent;
> class MouseEvent : public MouseRelatedEvent {
> public:
>     WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
>-        const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, unsigned short button, unsigned short buttons,
>+        const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, short button, unsigned short buttons,
>         EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* = nullptr, IsSimulated = IsSimulated::No, IsTrusted = IsTrusted::Yes);
> 
>     WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& eventType, RefPtr<WindowProxy>&&, const PlatformMouseEvent&, int detail, Node* relatedTarget);
> 
>     static Ref<MouseEvent> create(const AtomicString& eventType, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
>-        int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier>, unsigned short button, unsigned short buttons,
>+        int screenX, int screenY, int clientX, int clientY, OptionSet<Modifier>, short button, unsigned short buttons,
>         unsigned short syntheticClickType, EventTarget* relatedTarget);
> 
>     static Ref<MouseEvent> createForBindings() { return adoptRef(*new MouseEvent); }
>@@ -61,13 +61,13 @@ public:
> 
>     WEBCORE_EXPORT void initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>         int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
>-        unsigned short button, EventTarget* relatedTarget);
>+        short button, EventTarget* relatedTarget);
> 
>     void initMouseEventQuirk(JSC::ExecState&, ScriptExecutionContext&, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>         int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
>-        unsigned short button, JSC::JSValue relatedTarget);
>+        short button, JSC::JSValue relatedTarget);
> 
>-    unsigned short button() const { return m_button; }
>+    short button() const { return m_button; }
>     unsigned short buttons() const { return m_buttons; }
>     unsigned short syntheticClickType() const { return m_syntheticClickType; }
>     bool buttonDown() const { return m_buttonDown; }
>@@ -86,11 +86,11 @@ public:
> 
> protected:
>     MouseEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail,
>-        const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, unsigned short button, unsigned short buttons,
>+        const IntPoint& screenLocation, const IntPoint& windowLocation, const IntPoint& movementDelta, OptionSet<Modifier>, short button, unsigned short buttons,
>         EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer*, IsSimulated, IsTrusted);
> 
>     MouseEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, RefPtr<WindowProxy>&&, int detail,
>-        const IntPoint& screenLocation, const IntPoint& clientLocation, OptionSet<Modifier>, unsigned short button, unsigned short buttons,
>+        const IntPoint& screenLocation, const IntPoint& clientLocation, OptionSet<Modifier>, short button, unsigned short buttons,
>         unsigned short syntheticClickType, EventTarget* relatedTarget);
> 
>     MouseEvent(const AtomicString& type, const MouseEventInit&);
>@@ -105,7 +105,7 @@ private:
> 
>     void setRelatedTarget(EventTarget& relatedTarget) final { m_relatedTarget = &relatedTarget; }
> 
>-    unsigned short m_button { 0 };
>+    short m_button { 0 };
>     unsigned short m_buttons { 0 };
>     unsigned short m_syntheticClickType { 0 };
>     bool m_buttonDown { false };
>diff --git a/Source/WebCore/dom/MouseEvent.idl b/Source/WebCore/dom/MouseEvent.idl
>index a56220bf0f050fbe57b4a204f1da21d7211fe755..7e63d217266917df1b8859a78452cbb9d79d8bd0 100644
>--- a/Source/WebCore/dom/MouseEvent.idl
>+++ b/Source/WebCore/dom/MouseEvent.idl
>@@ -32,7 +32,7 @@
>     readonly attribute boolean shiftKey;
>     readonly attribute boolean altKey;
>     readonly attribute boolean metaKey;
>-    readonly attribute unsigned short button;
>+    readonly attribute short button;
>     readonly attribute unsigned short buttons;
>     readonly attribute EventTarget? relatedTarget;
> 
>@@ -49,7 +49,7 @@
>         optional WindowProxy? view = null, optional long detail = 0,
>         optional long screenX = 0, optional long screenY = 0, optional long clientX = 0, optional long clientY = 0,
>         optional boolean ctrlKey = false, optional boolean altKey = false, optional boolean shiftKey = false, optional boolean metaKey = false,
>-        optional unsigned short button = 0, optional any relatedTarget = null);
>+        optional short button = 0, optional any relatedTarget = null);
> 
>     readonly attribute long offsetX;
>     readonly attribute long offsetY;
>diff --git a/Source/WebCore/dom/MouseEventInit.h b/Source/WebCore/dom/MouseEventInit.h
>index 19a5ead472dedca3b7e64f6673f2684b09895a2d..9fc4fed5156e1ccdf5784030c4af37e0ebb9c296 100644
>--- a/Source/WebCore/dom/MouseEventInit.h
>+++ b/Source/WebCore/dom/MouseEventInit.h
>@@ -32,7 +32,7 @@ namespace WebCore {
> struct MouseEventInit : MouseRelatedEventInit {
>     int clientX { 0 };
>     int clientY { 0 };
>-    unsigned short button { 0 };
>+    short button { 0 };
>     unsigned short buttons { 0 };
>     RefPtr<EventTarget> relatedTarget;
> };
>diff --git a/Source/WebCore/dom/MouseEventInit.idl b/Source/WebCore/dom/MouseEventInit.idl
>index 6142760ace06e1679fb2e9889034edc83b6acb3d..1dcb732cdc9ee38c0aab6717cda33756db36055d 100644
>--- a/Source/WebCore/dom/MouseEventInit.idl
>+++ b/Source/WebCore/dom/MouseEventInit.idl
>@@ -28,7 +28,7 @@ dictionary MouseEventInit : EventModifierInit {
>     long screenY = 0;
>     long clientX = 0;
>     long clientY = 0;
>-    unsigned short button = 0;
>+    short button = 0;
>     unsigned short buttons = 0;
> 
>     // FIXME: We need to support the following member.
>diff --git a/Source/WebCore/dom/PointerEvent.cpp b/Source/WebCore/dom/PointerEvent.cpp
>index 7a18898958efed76dc6b029c24bb5e15512cf76a..93e37f034c77bdc387b8872d73bfb94cd218086d 100644
>--- a/Source/WebCore/dom/PointerEvent.cpp
>+++ b/Source/WebCore/dom/PointerEvent.cpp
>@@ -71,17 +71,22 @@ static AtomicString pointerEventType(const AtomicString& mouseEventType)
>     return nullAtom();
> }
> 
>-RefPtr<PointerEvent> PointerEvent::create(const MouseEvent& mouseEvent)
>+RefPtr<PointerEvent> PointerEvent::create(short button, const MouseEvent& mouseEvent)
> {
>     auto type = pointerEventType(mouseEvent.type());
>     if (type.isEmpty())
>         return nullptr;
> 
>+    return create(type, button, mouseEvent);
>+}
>+
>+Ref<PointerEvent> PointerEvent::create(const String& type, short button, const MouseEvent& mouseEvent)
>+{
>     auto isEnterOrLeave = type == eventNames().pointerenterEvent || type == eventNames().pointerleaveEvent;
>     auto canBubble = isEnterOrLeave ? CanBubble::No : CanBubble::Yes;
>     auto isCancelable = isEnterOrLeave ? IsCancelable::No : IsCancelable::Yes;
>     auto isComposed = isEnterOrLeave ? IsComposed::No : IsComposed::Yes;
>-    return adoptRef(*new PointerEvent(type, canBubble, isCancelable, isComposed, mouseEvent));
>+    return adoptRef(*new PointerEvent(type, canBubble, isCancelable, isComposed, button, mouseEvent));
> }
> 
> Ref<PointerEvent> PointerEvent::create(const String& type, PointerID pointerId, const String& pointerType, IsPrimary isPrimary)
>@@ -106,8 +111,8 @@ PointerEvent::PointerEvent(const AtomicString& type, Init&& initializer)
> {
> }
> 
>-PointerEvent::PointerEvent(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, const MouseEvent& mouseEvent)
>-    : MouseEvent(type, canBubble, isCancelable, isComposed, mouseEvent.view(), mouseEvent.detail(), mouseEvent.screenLocation(), { mouseEvent.clientX(), mouseEvent.clientY() }, mouseEvent.modifierKeys(), mouseEvent.button(), mouseEvent.buttons(), mouseEvent.syntheticClickType(), mouseEvent.relatedTarget())
>+PointerEvent::PointerEvent(const AtomicString& type, CanBubble canBubble, IsCancelable isCancelable, IsComposed isComposed, short button, const MouseEvent& mouseEvent)
>+    : MouseEvent(type, canBubble, isCancelable, isComposed, mouseEvent.view(), mouseEvent.detail(), mouseEvent.screenLocation(), { mouseEvent.clientX(), mouseEvent.clientY() }, mouseEvent.modifierKeys(), button, mouseEvent.buttons(), mouseEvent.syntheticClickType(), mouseEvent.relatedTarget())
>     , m_isPrimary(true)
> {
> }
>diff --git a/Source/WebCore/dom/PointerEvent.h b/Source/WebCore/dom/PointerEvent.h
>index 9b603b6f1095149675a86daeb76d4f858651b348..bc7c97ffdda7e09a42bae8ffab151e5907bb339f 100644
>--- a/Source/WebCore/dom/PointerEvent.h
>+++ b/Source/WebCore/dom/PointerEvent.h
>@@ -75,7 +75,8 @@ public:
>         return adoptRef(*new PointerEvent);
>     }
> 
>-    static RefPtr<PointerEvent> create(const MouseEvent&);
>+    static RefPtr<PointerEvent> create(short button, const MouseEvent&);
>+    static Ref<PointerEvent> create(const String& type, short button, const MouseEvent&);
>     static Ref<PointerEvent> create(const String& type, PointerID, const String& pointerType, IsPrimary = IsPrimary::No);
> 
> #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
>@@ -115,7 +116,7 @@ public:
> private:
>     PointerEvent();
>     PointerEvent(const AtomicString&, Init&&);
>-    PointerEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, const MouseEvent&);
>+    PointerEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, short button, const MouseEvent&);
>     PointerEvent(const AtomicString& type, CanBubble, IsCancelable, IsComposed, PointerID, const String& pointerType, IsPrimary);
> #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
>     PointerEvent(const AtomicString& type, const PlatformTouchEvent&, IsCancelable isCancelable, unsigned touchIndex, bool isPrimary, Ref<WindowProxy>&&);
>diff --git a/Source/WebCore/loader/NavigationAction.h b/Source/WebCore/loader/NavigationAction.h
>index ed7d09cf2892bb84df2f249b051475d8dc736791..4b611bf5be67ba7e01314639902fce79a84499ec 100644
>--- a/Source/WebCore/loader/NavigationAction.h
>+++ b/Source/WebCore/loader/NavigationAction.h
>@@ -94,7 +94,7 @@ public:
> 
>         LayoutPoint absoluteLocation;
>         FloatPoint locationInRootViewCoordinates;
>-        unsigned short button;
>+        short button;
>         unsigned short syntheticClickType;
>         bool buttonDown;
>     };
>diff --git a/Source/WebCore/page/PointerCaptureController.cpp b/Source/WebCore/page/PointerCaptureController.cpp
>index efa12a15d9bd7e19d2ae1841160a8694a0a66391..b4b3d808544aa36ffc98763332dc4733d1b05243 100644
>--- a/Source/WebCore/page/PointerCaptureController.cpp
>+++ b/Source/WebCore/page/PointerCaptureController.cpp
>@@ -220,6 +220,41 @@ void PointerCaptureController::dispatchEventForTouchAtIndex(EventTarget& target,
> }
> #endif
> 
>+RefPtr<PointerEvent> PointerCaptureController::pointerEventForMouseEvent(const MouseEvent& mouseEvent)
>+{
>+    const auto& type = mouseEvent.type();
>+    const auto& names = eventNames();
>+
>+    auto iterator = m_activePointerIdsToCapturingData.find(mousePointerID);
>+    ASSERT(iterator != m_activePointerIdsToCapturingData.end());
>+    auto& capturingData = iterator->value;
>+
>+    short newButton = mouseEvent.button();
>+    short button = newButton == capturingData.previousMouseButton ? -1 : newButton;
>+
>+    // https://w3c.github.io/pointerevents/#chorded-button-interactions
>+    // Some pointer devices, such as mouse or pen, support multiple buttons. In the Mouse Event model, each button
>+    // press produces a mousedown and mouseup event. To better abstract this hardware difference and simplify
>+    // cross-device input authoring, Pointer Events do not fire overlapping pointerdown and pointerup events
>+    // for chorded button presses (depressing an additional button while another button on the pointer device is
>+    // already depressed).
>+    if (type == names.mousedownEvent || type == names.mouseupEvent) {
>+        // We're already active and getting another mousedown, this means that we should dispatch
>+        // a pointermove event and let the button state show the newly depressed button.
>+        if (type == names.mousedownEvent && capturingData.pointerIsPressed)
>+            return PointerEvent::create(names.pointermoveEvent, button, mouseEvent);
>+
>+        // We're active and the mouseup still has some pressed button, this means we should dispatch
>+        // a pointermove event.
>+        if (type == names.mouseupEvent && capturingData.pointerIsPressed && mouseEvent.buttons() > 0)
>+            return PointerEvent::create(names.pointermoveEvent, button, mouseEvent);
>+    }
>+
>+    capturingData.previousMouseButton = newButton;
>+
>+    return PointerEvent::create(button, mouseEvent);
>+}
>+
> void PointerCaptureController::dispatchEvent(PointerEvent& event, EventTarget* target)
> {
>     auto iterator = m_activePointerIdsToCapturingData.find(event.pointerId());
>diff --git a/Source/WebCore/page/PointerCaptureController.h b/Source/WebCore/page/PointerCaptureController.h
>index 4311c46e13d20678d8361e7a06fea3904bb19fc3..3041e3a88d5a7851502506b314819466484efdd4 100644
>--- a/Source/WebCore/page/PointerCaptureController.h
>+++ b/Source/WebCore/page/PointerCaptureController.h
>@@ -49,6 +49,8 @@ public:
>     void pointerLockWasApplied();
>     void elementWasRemoved(Element&);
> 
>+    RefPtr<PointerEvent> pointerEventForMouseEvent(const MouseEvent&);
>+
> #if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
>     void dispatchEventForTouchAtIndex(EventTarget&, const PlatformTouchEvent&, unsigned, bool isPrimary, WindowProxy&);
> #endif
>@@ -68,6 +70,7 @@ private:
>         bool isPrimary { false };
>         bool preventsCompatibilityMouseEvents { false };
>         bool pointerIsPressed { false };
>+        short previousMouseButton { -1 };
>     };
> 
>     void pointerEventWillBeDispatched(const PointerEvent&, EventTarget*);
>diff --git a/Source/WebCore/platform/PlatformMouseEvent.h b/Source/WebCore/platform/PlatformMouseEvent.h
>index 2aee4aade74d6939035b085013562fdc3789ec54..487527b57e335baf4a050fd7fb666f03f9b631de 100644
>--- a/Source/WebCore/platform/PlatformMouseEvent.h
>+++ b/Source/WebCore/platform/PlatformMouseEvent.h
>@@ -42,7 +42,9 @@ const double ForceAtClick = 1;
> const double ForceAtForceClick = 2;
> 
>     // These button numbers match the ones used in the DOM API, 0 through 2, except for NoButton which isn't specified.
>-    enum MouseButton : int8_t { NoButton = -1, LeftButton, MiddleButton, RightButton };
>+    // We use -2 for NoButton because -1 is a valid value in the DOM API for Pointer Events for pointermove events that
>+    // indicate that the pressed mouse button hasn't changed since the last event.
>+    enum MouseButton : int8_t { LeftButton = 0, MiddleButton, RightButton, NoButton = -2 };
>     enum SyntheticClickType : int8_t { NoTap, OneFingerTap, TwoFingerTap };
> 
>     class PlatformMouseEvent : public PlatformEvent {
>@@ -136,15 +138,15 @@ const double ForceAtForceClick = 2;
> 
> #if COMPILER(MSVC)
>     // These functions are necessary to work around the fact that MSVC will not find a most-specific
>-    // operator== to use after implicitly converting MouseButton to an unsigned short.
>-    inline bool operator==(unsigned short a, MouseButton b)
>+    // operator== to use after implicitly converting MouseButton to a short.
>+    inline bool operator==(short a, MouseButton b)
>     {
>-        return a == static_cast<unsigned short>(b);
>+        return a == static_cast<short>(b);
>     }
> 
>-    inline bool operator!=(unsigned short a, MouseButton b)
>+    inline bool operator!=(short a, MouseButton b)
>     {
>-        return a != static_cast<unsigned short>(b);
>+        return a != static_cast<short>(b);
>     }
> #endif
> 
>diff --git a/Source/WebKit/Shared/API/c/WKEvent.h b/Source/WebKit/Shared/API/c/WKEvent.h
>index 477d554c96608c60fcaea87b59bea5a23edf48a4..f6f76fea16a7e06433d85469f998073c2f2ab92f 100644
>--- a/Source/WebKit/Shared/API/c/WKEvent.h
>+++ b/Source/WebKit/Shared/API/c/WKEvent.h
>@@ -42,10 +42,10 @@ enum {
> typedef uint32_t WKEventModifiers;
> 
> enum {
>-    kWKEventMouseButtonNoButton = -1,
>     kWKEventMouseButtonLeftButton = 0,
>     kWKEventMouseButtonMiddleButton = 1,
>     kWKEventMouseButtonRightButton = 2,
>+    kWKEventMouseButtonNoButton = -2
> };
> typedef int32_t WKEventMouseButton;
> 
>diff --git a/Source/WebKit/Shared/WebEvent.h b/Source/WebKit/Shared/WebEvent.h
>index 28286f6cc62a991c95eb6f4ad43af6492032af9d..7e8b01865d18a89ce6576aba609bc687f3e5f6d7 100644
>--- a/Source/WebKit/Shared/WebEvent.h
>+++ b/Source/WebKit/Shared/WebEvent.h
>@@ -127,10 +127,10 @@ private:
> class WebMouseEvent : public WebEvent {
> public:
>     enum Button {
>-        NoButton = -1,
>-        LeftButton,
>+        LeftButton = 0,
>         MiddleButton,
>-        RightButton
>+        RightButton,
>+        NoButton = -2
>     };
> 
>     enum SyntheticClickType { NoTap, OneFingerTap, TwoFingerTap };
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.h b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.h
>index fefce48012ce3ba818d5a4b088d70d8c8bb2d976..ac6f45c9605bf0cc459ba05fe5dce431d0a17634 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.h
>+++ b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.h
>@@ -40,7 +40,7 @@ WEBKIT_CLASS_DEPRECATED_MAC(10_4, 10_14)
> @property (readonly) BOOL shiftKey;
> @property (readonly) BOOL altKey;
> @property (readonly) BOOL metaKey;
>-@property (readonly) unsigned short button;
>+@property (readonly) short button;
> @property (readonly, strong) id <DOMEventTarget> relatedTarget;
> @property (readonly) int offsetX WEBKIT_AVAILABLE_MAC(10_5);
> @property (readonly) int offsetY WEBKIT_AVAILABLE_MAC(10_5);
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>index 95f2235d4572fb396d624c39fc5069b3096dc39f..bf82345020f5bdd2fcccd3bb7eba9f850ceebcc7 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>@@ -92,7 +92,7 @@ - (BOOL)metaKey
>     return IMPL->metaKey();
> }
> 
>-- (unsigned short)button
>+- (short)button
> {
>     WebCore::JSMainThreadNullState state;
>     return IMPL->button();
>diff --git a/Source/WebKitLegacy/mac/WebView/WebPDFView.mm b/Source/WebKitLegacy/mac/WebView/WebPDFView.mm
>index 786925ed1504b18fced18b5fa62b0f4041ce7a58..b5761f2390cb8f88322aff18fd90d70b673c02e4 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebPDFView.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebPDFView.mm
>@@ -960,7 +960,7 @@ - (void)PDFViewWillClickOnLink:(PDFView *)sender withURL:(NSURL *)URL
> 
>     NSWindow *window = [sender window];
>     NSEvent *nsEvent = [window currentEvent];
>-    const int noButton = -1;
>+    const int noButton = -2;
>     int button = noButton;
>     RefPtr<Event> event;
>     switch ([nsEvent type]) {
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 288349033ceec728bdcd2b28d92272549e0c674c..431ef739e7e0f0f7a434d89b04acc8556b846372 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,34 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Until now, MouseEvent.buttons would always return 0 when used within DRT and WKTR as [NSEvent pressedMouseButtons], used
>+        by PlatformMouseEventBuilder to set the m_buttons value eventually used to set MouseEvent.buttons, not account for the
>+        NSEvent created through the eventSender JS object in tests. To fix this, we now track the pressed mouse buttons within
>+        DRT and WKTR as mouseDown() and mouseUp() are called, and swizzle [NSEvent pressedMouseButtons] to return that value.
>+
>+        In the case of DRT, one test would fail when swizzling this method in the case where the target view for the event would
>+        be the DRTMockScroller, a subclass of NSScroller. So we only swizzle when the target view is *not* an NSScroller or a
>+        subclass.
>+
>+        Finally, we change the NoMouseButton enum value from -1 to -2 to adjust to MouseEvent.button now being a "short".
>+
>+        * DumpRenderTree/mac/EventSendingController.mm:
>+        (swizzledEventPressedMouseButtons):
>+        (-[EventSendingController mouseDown:withModifiers:]):
>+        (-[EventSendingController mouseUp:withModifiers:]):
>+        (-[EventSendingController mouseMoveToX:Y:]):
>+        * WebKitTestRunner/EventSenderProxy.h:
>+        (WTR::EventSenderProxy::mouseButtonsCurrentlyDown const):
>+        * WebKitTestRunner/mac/EventSenderProxy.mm:
>+        (WTR::swizzledEventPressedMouseButtons):
>+        (WTR::EventSenderProxy::mouseDown):
>+        (WTR::EventSenderProxy::mouseUp):
>+        (WTR::EventSenderProxy::mouseMoveTo):
>+
> 2019-05-31  Sihui Liu  <sihui_liu@apple.com>
> 
>         TestWebKitAPI.WKWebView.LocalStorageProcessSuspends is flaky
>diff --git a/Tools/DumpRenderTree/mac/EventSendingController.mm b/Tools/DumpRenderTree/mac/EventSendingController.mm
>index 19fefadfabdb2547da3e4e68601dfb79660aa166..3e88d820ae422fbb4c0d087ad3de0593f0c9aeb8 100644
>--- a/Tools/DumpRenderTree/mac/EventSendingController.mm
>+++ b/Tools/DumpRenderTree/mac/EventSendingController.mm
>@@ -32,6 +32,7 @@
> #import "config.h"
> #import "EventSendingController.h"
> 
>+#import "ClassMethodSwizzler.h"
> #import "DumpRenderTree.h"
> #import "DumpRenderTreeDraggingInfo.h"
> #import "DumpRenderTreeFileDraggingSource.h"
>@@ -77,7 +78,7 @@ enum MouseButton {
>     LeftMouseButton = 0,
>     MiddleMouseButton = 1,
>     RightMouseButton = 2,
>-    NoMouseButton = -1
>+    NoMouseButton = -2
> };
> 
> struct KeyMappingEntry {
>@@ -93,7 +94,7 @@ int lastClickButton = NoMouseButton;
> NSArray *webkitDomEventNames;
> NSMutableArray *savedMouseEvents; // mouse events sent between mouseDown and mouseUp are stored here, and then executed at once.
> BOOL replayingSavedEvents;
>-
>+unsigned mouseButtonsCurrentlyDown = 0;
> 
> #if PLATFORM(IOS_FAMILY)
> @interface SyntheticTouch : NSObject {
>@@ -561,8 +562,17 @@ static int buildModifierFlags(const WebScriptObject* modifiers)
>     return flags;
> }
> 
>+#if !PLATFORM(IOS_FAMILY)
>+static NSUInteger swizzledEventPressedMouseButtons()
>+{
>+    return mouseButtonsCurrentlyDown;
>+}
>+#endif
>+
> - (void)mouseDown:(int)buttonNumber withModifiers:(WebScriptObject*)modifiers
> {
>+    mouseButtonsCurrentlyDown |= (1 << buttonNumber);
>+
>     [[[mainFrame frameView] documentView] layout];
>     [self updateClickCountForButton:buttonNumber];
>     
>@@ -588,7 +598,12 @@ - (void)mouseDown:(int)buttonNumber withModifiers:(WebScriptObject*)modifiers
> #if !PLATFORM(IOS_FAMILY)
>         [NSApp _setCurrentEvent:event];
> #endif
>-        [subView mouseDown:event];
>+        {
>+#if !PLATFORM(IOS_FAMILY)
>+            auto eventPressedMouseButtonsSwizzler = ![subView isKindOfClass:[NSScroller class]] ? std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons)) : NULL;
>+#endif
>+            [subView mouseDown:event];
>+        }
> #if !PLATFORM(IOS_FAMILY)
>         [NSApp _setCurrentEvent:nil];
> #endif
>@@ -637,6 +652,8 @@ - (void)scalePageBy:(float)scale atX:(float)x andY:(float)y
> 
> - (void)mouseUp:(int)buttonNumber withModifiers:(WebScriptObject*)modifiers
> {
>+    mouseButtonsCurrentlyDown &= ~(1 << buttonNumber);
>+
>     if (dragMode && !replayingSavedEvents) {
>         NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[EventSendingController instanceMethodSignatureForSelector:@selector(mouseUp:withModifiers:)]];
>         [invocation setTarget:self];
>@@ -677,7 +694,12 @@ - (void)mouseUp:(int)buttonNumber withModifiers:(WebScriptObject*)modifiers
> #if !PLATFORM(IOS_FAMILY)
>     [NSApp _setCurrentEvent:event];
> #endif
>-    [targetView mouseUp:event];
>+    {
>+#if !PLATFORM(IOS_FAMILY)
>+        auto eventPressedMouseButtonsSwizzler = ![targetView isKindOfClass:[NSScroller class]] ? std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons)) : NULL;
>+#endif
>+        [targetView mouseUp:event];
>+    }
> #if !PLATFORM(IOS_FAMILY)
>     [NSApp _setCurrentEvent:nil];
> #endif
>@@ -762,11 +784,19 @@ - (void)mouseMoveToX:(int)x Y:(int)y
>                 if ([[draggingInfo draggingSource] respondsToSelector:@selector(draggedImage:movedTo:)])
>                     [[draggingInfo draggingSource] draggedImage:[draggingInfo draggedImage] movedTo:lastMousePosition];
>                 [[mainFrame webView] draggingUpdated:draggingInfo];
>-            } else
>+            } else {
>+#if !PLATFORM(IOS_FAMILY)
>+                auto eventPressedMouseButtonsSwizzler = ![subView isKindOfClass:[NSScroller class]] ? std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons)) : NULL;
>+#endif
>                 [subView mouseDragged:event];
>+            }
>+#endif
>+        } else {
>+#if !PLATFORM(IOS_FAMILY)
>+            auto eventPressedMouseButtonsSwizzler = ![subView isKindOfClass:[NSScroller class]] ? std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons)) : NULL;
> #endif
>-        } else
>             [subView mouseMoved:event];
>+        }
> #if !PLATFORM(IOS_FAMILY)
>         [NSApp _setCurrentEvent:nil];
> #endif
>diff --git a/Tools/WebKitTestRunner/EventSenderProxy.h b/Tools/WebKitTestRunner/EventSenderProxy.h
>index 0ea1b5bfb74902cc7f65460b8c4dba302ddc67a5..15322182699e0ea30754a0226c3a7b6295976d00 100644
>--- a/Tools/WebKitTestRunner/EventSenderProxy.h
>+++ b/Tools/WebKitTestRunner/EventSenderProxy.h
>@@ -76,6 +76,10 @@ public:
> 
>     void keyDown(WKStringRef key, WKEventModifiers, unsigned location);
> 
>+#if PLATFORM(COCOA)
>+    unsigned mouseButtonsCurrentlyDown() const { return m_mouseButtonsCurrentlyDown; }
>+#endif
>+
> #if ENABLE(TOUCH_EVENTS)
>     // Touch events.
>     void addTouchPoint(int x, int y);
>@@ -137,6 +141,7 @@ private:
>     WKEventMouseButton m_clickButton;
> #if PLATFORM(COCOA)
>     int eventNumber;
>+    unsigned m_mouseButtonsCurrentlyDown { 0 };
> #elif PLATFORM(GTK)
>     Deque<WTREventQueueItem> m_eventQueue;
>     unsigned m_mouseButtonsCurrentlyDown { 0 };
>diff --git a/Tools/WebKitTestRunner/mac/EventSenderProxy.mm b/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
>index 75537f1d88466a4c3f1cc942399d7c6111310cc4..d1cfc6a3321e029c8ba8115f4a6d9207f8e7184f 100644
>--- a/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
>+++ b/Tools/WebKitTestRunner/mac/EventSenderProxy.mm
>@@ -204,7 +204,7 @@ enum MouseButton {
>     LeftMouseButton = 0,
>     MiddleMouseButton = 1,
>     RightMouseButton = 2,
>-    NoMouseButton = -1
>+    NoMouseButton = -2
> };
> 
> struct KeyMappingEntry {
>@@ -301,8 +301,15 @@ void EventSenderProxy::updateClickCountForButton(int button)
>     m_clickButton = button;
> }
> 
>+static NSUInteger swizzledEventPressedMouseButtons()
>+{
>+    return TestController::singleton().eventSenderProxy()->mouseButtonsCurrentlyDown();
>+}
>+
> void EventSenderProxy::mouseDown(unsigned buttonNumber, WKEventModifiers modifiers)
> {
>+    m_mouseButtonsCurrentlyDown |= (1 << buttonNumber);
>+
>     updateClickCountForButton(buttonNumber);
> 
>     NSEventType eventType = eventTypeForMouseButtonAndAction(buttonNumber, MouseDown);
>@@ -318,6 +325,7 @@ void EventSenderProxy::mouseDown(unsigned buttonNumber, WKEventModifiers modifie
> 
>     NSView *targetView = [m_testController->mainWebView()->platformView() hitTest:[event locationInWindow]];
>     if (targetView) {
>+        auto eventPressedMouseButtonsSwizzler = std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons));
>         [NSApp _setCurrentEvent:event];
>         [targetView mouseDown:event];
>         [NSApp _setCurrentEvent:nil];
>@@ -328,6 +336,8 @@ void EventSenderProxy::mouseDown(unsigned buttonNumber, WKEventModifiers modifie
> 
> void EventSenderProxy::mouseUp(unsigned buttonNumber, WKEventModifiers modifiers)
> {
>+    m_mouseButtonsCurrentlyDown &= ~(1 << buttonNumber);
>+
>     NSEventType eventType = eventTypeForMouseButtonAndAction(buttonNumber, MouseUp);
>     NSEvent *event = [NSEvent mouseEventWithType:eventType
>                                         location:NSMakePoint(m_position.x, m_position.y)
>@@ -347,6 +357,7 @@ void EventSenderProxy::mouseUp(unsigned buttonNumber, WKEventModifiers modifiers
>         targetView = m_testController->mainWebView()->platformView();
> 
>     ASSERT(targetView);
>+    auto eventPressedMouseButtonsSwizzler = std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons));
>     [NSApp _setCurrentEvent:event];
>     [targetView mouseUp:event];
>     [NSApp _setCurrentEvent:nil];
>@@ -582,6 +593,7 @@ void EventSenderProxy::mouseMoveTo(double x, double y)
>     // Always target drags at the WKWebView to allow for drag-scrolling outside the view.
>     NSView *targetView = isDrag ? m_testController->mainWebView()->platformView() : [m_testController->mainWebView()->platformView() hitTest:windowLocation];
>     if (targetView) {
>+        auto eventPressedMouseButtonsSwizzler = std::make_unique<ClassMethodSwizzler>([NSEvent class], @selector(pressedMouseButtons), reinterpret_cast<IMP>(swizzledEventPressedMouseButtons));
>         [NSApp _setCurrentEvent:event];
>         if (isDrag)
>             [targetView mouseDragged:event];
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 37571481a2c8831e1c5569019d635d7cfd1b3285..fea4fc4439bb5558f131fed401f34df5487ccd63 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,26 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Update some tests and their expectations due to MouseEvent.buttons now returning the correct value in DRT and WKTR
>+        and MouseEvent.button now being a "short" instead of an "unsigned short".
>+
>+        * fast/events/constructors/mouse-event-constructor-expected.txt:
>+        * fast/events/constructors/mouse-event-constructor.html: Update the test to test the boundary values for "short" instead
>+        of "unsigned short" as well as the new "magic" value of -2 for no button, which ends up being reported as 0.
>+        * fast/events/constructors/wheel-event-constructor-expected.txt:
>+        * fast/events/constructors/wheel-event-constructor.html: Update the test to test the boundary values for "short" instead
>+        of "unsigned short" as well as the new "magic" value of -2 for no button, which ends up being reported as 0.
>+        * fast/events/fire-mousedown-while-pressing-mouse-button.html: Rewrite this test to always use MouseEvent.buttons and
>+        adjust the bitmask expectations which were way off.
>+        * platform/mac-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt:
>+        * platform/mac-highsierra/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt:
>+        * platform/mac-highsierra-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt:
>+        This test fails differently in WK1 and WK2 and will be addressed in a future patch.
>+
> 2019-06-01  Simon Fraser  <simon.fraser@apple.com>
> 
>         [Async overflow scroll] Flashing content when scrolling async overflow with a negative z-index child
>diff --git a/LayoutTests/imported/w3c/ChangeLog b/LayoutTests/imported/w3c/ChangeLog
>index 9bc4229105c8c76c73951377639f653913759af3..1e6f898761d530e4daa3e74aa89b44c2897c61ab 100644
>--- a/LayoutTests/imported/w3c/ChangeLog
>+++ b/LayoutTests/imported/w3c/ChangeLog
>@@ -1,3 +1,21 @@
>+2019-06-01  Antoine Quint  <graouts@apple.com>
>+
>+        [Pointer Events] Add support for chorded button interactions
>+        https://bugs.webkit.org/show_bug.cgi?id=198462
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Mark the progression for web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover.html which
>+        proves the correct implementation of the chorded button interactions section of the Pointer Events spec. To do that,
>+        we also had to make use of the "button" parameter used in WPT tests action sequences, which allows the test to indicate
>+        which mouse button is pressed. Finally, there is now a change in the pointerevent_pointermove_on_chorded_mouse_button.html
>+        results, another source change is required to get this test to fully pass.
>+
>+        * web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt:
>+        * web-platform-tests/pointerevents/pointerevent_pointermove_on_chorded_mouse_button-expected.txt:
>+        * web-platform-tests/resources/testdriver-vendor.js:
>+        (dispatchMouseActions):
>+
> 2019-05-31  Joonghun Park  <jh718.park@samsung.com>
> 
>         Always min-width should win over max-width.
>diff --git a/LayoutTests/fast/events/constructors/mouse-event-constructor-expected.txt b/LayoutTests/fast/events/constructors/mouse-event-constructor-expected.txt
>index c93a54e94bffcb174d27f6856efc9804d73edd87..88be2e1d42199f1a34116c197d2223fb8da0b31c 100644
>--- a/LayoutTests/fast/events/constructors/mouse-event-constructor-expected.txt
>+++ b/LayoutTests/fast/events/constructors/mouse-event-constructor-expected.txt
>@@ -151,11 +151,13 @@ PASS new MouseEvent('eventType', { shiftKey: true }).shiftKey is true
> PASS new MouseEvent('eventType', { metaKey: false }).metaKey is false
> PASS new MouseEvent('eventType', { metaKey: true }).metaKey is true
> PASS new MouseEvent('eventType', { button: 0 }).button is 0
>+PASS new MouseEvent('eventType', { button: -1 }).button is -1
>+PASS new MouseEvent('eventType', { button: -2 }).button is 0
> PASS new MouseEvent('eventType', { button: 1 }).button is 1
>-PASS new MouseEvent('eventType', { button: 65534 }).button is 65534
>-PASS new MouseEvent('eventType', { button: 65535 }).button is 0
>-PASS new MouseEvent('eventType', { button: 9007199254740991 }).button is 0
>-PASS new MouseEvent('eventType', { button: -1 }).button is 0
>+PASS new MouseEvent('eventType', { button: -32768 }).button is -32768
>+PASS new MouseEvent('eventType', { button: 32767 }).button is 32767
>+PASS new MouseEvent('eventType', { button: 32768 }).button is -32768
>+PASS new MouseEvent('eventType', { button: -32769 }).button is 32767
> PASS new MouseEvent('eventType', { button: 18446744073709551615 }).button is 0
> PASS new MouseEvent('eventType', { button: 12345678901234567890 }).button is 2048
> PASS new MouseEvent('eventType', { button: 123.45 }).button is 123
>diff --git a/LayoutTests/fast/events/constructors/mouse-event-constructor.html b/LayoutTests/fast/events/constructors/mouse-event-constructor.html
>index bc1d3c856b6f1b937b50410645398b7a9224dc2a..ac2f245a6ccccf7acf400227e5d6922b4ee6f489 100644
>--- a/LayoutTests/fast/events/constructors/mouse-event-constructor.html
>+++ b/LayoutTests/fast/events/constructors/mouse-event-constructor.html
>@@ -100,15 +100,15 @@ shouldThrow("new MouseEvent('eventType', { get view() { throw 'MouseEvent Error'
> });
> 
> // button is passed.
>-// Numbers within the unsigned short range.
>+// Numbers within the short range.
> shouldBe("new MouseEvent('eventType', { button: 0 }).button", "0");
>+shouldBe("new MouseEvent('eventType', { button: -1 }).button", "-1");
>+shouldBe("new MouseEvent('eventType', { button: -2 }).button", "0");
> shouldBe("new MouseEvent('eventType', { button: 1 }).button", "1");
>-shouldBe("new MouseEvent('eventType', { button: 65534 }).button", "65534");
>-
>-// Numbers that are equal to ((unsigned short)-1) should be treated as 0.
>-shouldBe("new MouseEvent('eventType', { button: 65535 }).button", "0");
>-shouldBe("new MouseEvent('eventType', { button: 9007199254740991 }).button", "0");
>-shouldBe("new MouseEvent('eventType', { button: -1 }).button", "0");
>+shouldBe("new MouseEvent('eventType', { button: -32768 }).button", "-32768");
>+shouldBe("new MouseEvent('eventType', { button: 32767 }).button", "32767");
>+shouldBe("new MouseEvent('eventType', { button: 32768 }).button", "-32768");
>+shouldBe("new MouseEvent('eventType', { button: -32769 }).button", "32767");
> 
> // Numbers out of the unsigned short range.
> // 2^{64}-1
>diff --git a/LayoutTests/fast/events/constructors/wheel-event-constructor-expected.txt b/LayoutTests/fast/events/constructors/wheel-event-constructor-expected.txt
>index 11c595bb310307fad5c56f17443849481486bca7..720f5e8d8cb424ef668bc995195ec793eac5481c 100644
>--- a/LayoutTests/fast/events/constructors/wheel-event-constructor-expected.txt
>+++ b/LayoutTests/fast/events/constructors/wheel-event-constructor-expected.txt
>@@ -221,11 +221,13 @@ PASS new WheelEvent('eventType', { shiftKey: true }).shiftKey is true
> PASS new WheelEvent('eventType', { metaKey: false }).metaKey is false
> PASS new WheelEvent('eventType', { metaKey: true }).metaKey is true
> PASS new WheelEvent('eventType', { button: 0 }).button is 0
>+PASS new WheelEvent('eventType', { button: -1 }).button is -1
>+PASS new WheelEvent('eventType', { button: -2 }).button is 0
> PASS new WheelEvent('eventType', { button: 1 }).button is 1
>-PASS new WheelEvent('eventType', { button: 65534 }).button is 65534
>-PASS new WheelEvent('eventType', { button: 65535 }).button is 0
>-PASS new WheelEvent('eventType', { button: 9007199254740991 }).button is 0
>-PASS new WheelEvent('eventType', { button: -1 }).button is 0
>+PASS new WheelEvent('eventType', { button: -32768 }).button is -32768
>+PASS new WheelEvent('eventType', { button: 32767 }).button is 32767
>+PASS new WheelEvent('eventType', { button: 32768 }).button is -32768
>+PASS new WheelEvent('eventType', { button: -32769 }).button is 32767
> PASS new WheelEvent('eventType', { button: 18446744073709551615 }).button is 0
> PASS new WheelEvent('eventType', { button: 12345678901234567890 }).button is 2048
> PASS new WheelEvent('eventType', { button: 123.45 }).button is 123
>diff --git a/LayoutTests/fast/events/constructors/wheel-event-constructor.html b/LayoutTests/fast/events/constructors/wheel-event-constructor.html
>index ac40f1abecfdaa686d9e8f353c1c40c8c6d97bc2..fa06b26103eeee7fd9a59facf595271f9c6d733a 100644
>--- a/LayoutTests/fast/events/constructors/wheel-event-constructor.html
>+++ b/LayoutTests/fast/events/constructors/wheel-event-constructor.html
>@@ -137,15 +137,15 @@ shouldBe("new WheelEvent('eventType', { deltaMode: {valueOf: function () { retur
> });
> 
> // button is passed.
>-// Numbers within the unsigned short range.
>+// Numbers within the short range.
> shouldBe("new WheelEvent('eventType', { button: 0 }).button", "0");
>+shouldBe("new WheelEvent('eventType', { button: -1 }).button", "-1");
>+shouldBe("new WheelEvent('eventType', { button: -2 }).button", "0");
> shouldBe("new WheelEvent('eventType', { button: 1 }).button", "1");
>-shouldBe("new WheelEvent('eventType', { button: 65534 }).button", "65534");
>-
>-// Numbers that are equal to ((unsigned short)-1) should be treated as 0.
>-shouldBe("new WheelEvent('eventType', { button: 65535 }).button", "0");
>-shouldBe("new WheelEvent('eventType', { button: 9007199254740991 }).button", "0");
>-shouldBe("new WheelEvent('eventType', { button: -1 }).button", "0");
>+shouldBe("new WheelEvent('eventType', { button: -32768 }).button", "-32768");
>+shouldBe("new WheelEvent('eventType', { button: 32767 }).button", "32767");
>+shouldBe("new WheelEvent('eventType', { button: 32768 }).button", "-32768");
>+shouldBe("new WheelEvent('eventType', { button: -32769 }).button", "32767");
> 
> // Numbers out of the unsigned short range.
> // 2^{64}-1
>diff --git a/LayoutTests/fast/events/fire-mousedown-while-pressing-mouse-button.html b/LayoutTests/fast/events/fire-mousedown-while-pressing-mouse-button.html
>index 351c5aa66d8490c7c374755bec50b13e2985e7f6..17643fe639ce95f1e36c2b9a6aaab2abebc2a4c4 100644
>--- a/LayoutTests/fast/events/fire-mousedown-while-pressing-mouse-button.html
>+++ b/LayoutTests/fast/events/fire-mousedown-while-pressing-mouse-button.html
>@@ -47,15 +47,15 @@ window.onload = function()
>     runTest();
> }
> 
>-function toIEMouseButton(w3cButton)
>+function toBitmaskMouseButton(w3cButton)
> {
>     switch (w3cButton) {
>     case LeftMouseButton:
>-        return 1;
>+        return 1 << 0;
>     case MiddleMouseButton:
>-        return 4;
>+        return 1 << 1;
>     case RightMouseButton:
>-        return 2;
>+        return 1 << 2;
>     }
>     return; // We shouldn't get here.
> }
>@@ -91,24 +91,13 @@ function cancelContextMenu(event)
> 
> function checkIfDoneOnMouseDown(event)
> {
>-    var pressedButtons; // A bitmask that represents the combination of buttons that are currently being pressed.
>-    if (event && event.buttons)
>-        pressedButtons = event.buttons; // DOM Level 3 Events (Working Draft 07 September 2010).
>-    else if (event) {
>-        // For browsers than don't support event.buttons (or IE's window.event.button) we convert event.button to
>-        // the corresponding bitmask to simplify the logic below.
>-        pressedButtons = toIEMouseButton(event.button);
>-    } else {
>-        // Assume this script is running within Internet Explorer.
>-        pressedButtons = window.event.button;
>-    }
>-
>+    var pressedButtons = event.buttons; // A bitmask that represents the combination of buttons that are currently being pressed.
>     var chosenFirstMouseButton = firstMouseButtonElem.selectedIndex;
>     var chosenSecondMouseButton = secondMouseButtonElem.selectedIndex;
>-    if (!didFireMousedownForFirstMouseButton && (pressedButtons & toIEMouseButton(chosenFirstMouseButton)) == toIEMouseButton(chosenFirstMouseButton)) {
>+    if (!didFireMousedownForFirstMouseButton && (pressedButtons & toBitmaskMouseButton(chosenFirstMouseButton)) == toBitmaskMouseButton(chosenFirstMouseButton)) {
>         didFireMousedownForFirstMouseButton = true;
>         square.innerHTML = "Now, " + shortMouseButtonName(chosenSecondMouseButton) + " click";
>-    } else if (didFireMousedownForFirstMouseButton && (pressedButtons & toIEMouseButton(chosenSecondMouseButton)) == toIEMouseButton(chosenSecondMouseButton))
>+    } else if (didFireMousedownForFirstMouseButton && (pressedButtons & toBitmaskMouseButton(chosenSecondMouseButton)) == toBitmaskMouseButton(chosenSecondMouseButton))
>         didFireMousedownForSecondMouseButton = true;
>     if (didFireMousedownForFirstMouseButton && didFireMousedownForSecondMouseButton) {
>         testPassed("received mousedown for the " + mouseButtonName(chosenSecondMouseButton) + " while pressing the " + mouseButtonName(chosenFirstMouseButton) + ".");
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>index 801620b89c38138a648217870d18e962ba7255d4..295300e2e6cf9652b2c368a69019eb4e6a84a917 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>+++ b/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>@@ -1,5 +1,5 @@
> 
> FAIL Mouse down and capture to green. assert_array_equals: Received events: green received pointerover,green received pointerenter,green received pointermove,green received pointerdown,green received gotpointercapture,green received pointermove,green received pointerout,green received pointerleave,green received pointerover,green received pointerenter,green received pointermove lengths differ, expected 7 got 11
>-FAIL Mouse down at green and capture to blue. assert_array_equals: Received events: green received pointerout,green received pointerover,green received pointerenter,green received pointermove,green received pointerdown,green received lostpointercapture,blue received gotpointercapture,blue received pointermove,blue received pointermove lengths differ, expected 11 got 9
>-FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events: blue received pointerout,blue received pointerover,blue received pointerenter,blue received pointermove,blue received pointerdown,blue received pointerout,blue received pointerleave,blue received pointerover,blue received pointerenter,blue received pointermove,blue received pointermove lengths differ, expected 12 got 11
>+FAIL Mouse down at green and capture to blue. assert_array_equals: Received events: green received pointerout,green received pointerover,green received pointerenter,green received pointermove,green received pointermove,green received pointermove lengths differ, expected 11 got 6
>+FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events: green received pointerout,green received pointerover,green received pointerenter,green received pointermove,green received lostpointercapture,green received pointerout,green received pointerleave,blue received pointerover,blue received pointerenter,blue received pointermove,blue received pointermove lengths differ, expected 12 got 11
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_pointermove_on_chorded_mouse_button-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_pointermove_on_chorded_mouse_button-expected.txt
>index 926b75ff40fe6e7ca159d3cd5f7e7a1d22f052e6..a9b9f0f999383edf4cf55686d349c3f85676f0f6 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_pointermove_on_chorded_mouse_button-expected.txt
>+++ b/LayoutTests/imported/w3c/web-platform-tests/pointerevents/pointerevent_pointermove_on_chorded_mouse_button-expected.txt
>@@ -14,5 +14,5 @@ The following pointer types were detected: mouse.
> Refresh the page to run the tests again.
> 
> 
>-FAIL pointermove events received for button state changes assert_true: There must not be more than one pointer down event. expected true got false
>+PASS pointermove events received for button state changes 
> 
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/resources/testdriver-vendor.js b/LayoutTests/imported/w3c/web-platform-tests/resources/testdriver-vendor.js
>index c4bb28a43b514fd80f5730df8df290191930b8ab..dcbbf1fb68585c6bdd9ab987f17f3a1b32955182 100644
>--- a/LayoutTests/imported/w3c/web-platform-tests/resources/testdriver-vendor.js
>+++ b/LayoutTests/imported/w3c/web-platform-tests/resources/testdriver-vendor.js
>@@ -28,14 +28,12 @@ function dispatchMouseActions(actions)
>                     eventSender.mouseMoveTo(action.x + origin.x, action.y + origin.y);
>                     break;
>                 case "pointerDown":
>-                    // FIXME: what to do with "button"?
>                     logDebug(() => `eventSender.mouseDown()`);
>-                    eventSender.mouseDown();
>+                    eventSender.mouseDown(action.button);
>                     break;
>                 case "pointerUp":
>-                    // FIXME: what to do with "button"?
>                     logDebug(() => `eventSender.mouseUp()`);
>-                    eventSender.mouseUp();
>+                    eventSender.mouseUp(action.button);
>                     break;
>                 default:
>                     return Promise.reject(new Error(`Unknown action type "${action.type}".`));
>diff --git a/LayoutTests/platform/mac-highsierra-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt b/LayoutTests/platform/mac-highsierra-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..e0038c394190958bc7facf64ee37cc078d88099b
>--- /dev/null
>+++ b/LayoutTests/platform/mac-highsierra-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>@@ -0,0 +1,5 @@
>+
>+FAIL Mouse down and capture to green. assert_array_equals: Received events: green received pointerover,green received pointerenter,green received pointermove,green received pointerdown,green received gotpointercapture lengths differ, expected 7 got 5
>+FAIL Mouse down at green and capture to blue. assert_array_equals: Received events: green received pointermove lengths differ, expected 11 got 1
>+FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events: green received pointermove,green received lostpointercapture lengths differ, expected 12 got 2
>+
>diff --git a/LayoutTests/platform/mac-highsierra/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt b/LayoutTests/platform/mac-highsierra/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..8ae0fa221a4940a8fc2a5e64051530324b1b3e4e
>--- /dev/null
>+++ b/LayoutTests/platform/mac-highsierra/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>@@ -0,0 +1,5 @@
>+
>+FAIL Mouse down and capture to green. assert_array_equals: Received events: green received pointerover,green received pointerenter,green received pointermove,green received pointerdown,green received gotpointercapture,green received pointermove,green received pointerout,green received pointerleave,green received pointerover,green received pointerenter,green received pointermove lengths differ, expected 7 got 11
>+FAIL Mouse down at green and capture to blue. assert_array_equals: Received events: green received pointerout,green received pointerover,green received pointerenter,green received pointermove,green received pointermove,green received pointermove,green received pointermove lengths differ, expected 11 got 7
>+FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events: green received pointerout,green received pointerover,green received pointerenter,green received pointermove,green received lostpointercapture,green received pointermove,green received pointerout,green received pointerleave,blue received pointerover,blue received pointerenter,blue received pointermove,blue received pointermove property 0, expected "green received pointerover" but got "green received pointerout"
>+
>diff --git a/LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt b/LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>index c2848c8b3df83ce157a56af5d746e0bcf1fb99fa..3e54bf8dbb6b6a967ab879ab3a77a9c7348b5ade 100644
>--- a/LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>+++ b/LayoutTests/platform/mac-wk1/imported/w3c/web-platform-tests/pointerevents/pointerevent_mouse_capture_change_hover-expected.txt
>@@ -1,5 +1,5 @@
> 
> FAIL Mouse down and capture to green. assert_array_equals: Received events: green received pointerover,green received pointerenter,green received pointermove,green received pointerdown,green received gotpointercapture lengths differ, expected 7 got 5
>-FAIL Mouse down at green and capture to blue. assert_array_equals: Received events: green received pointerdown,green received lostpointercapture,blue received gotpointercapture lengths differ, expected 11 got 3
>-FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events: blue received pointerdown lengths differ, expected 12 got 1
>+FAIL Mouse down at green and capture to blue. assert_array_equals: Received events:  lengths differ, expected 11 got 0
>+FAIL Mouse down and capture to green, move to blue and release capture assert_array_equals: Received events:  lengths differ, expected 12 got 0
>

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Attachments on bug 198462: 371126 | 371132 | 371133 | 371134 | 371140 | 371144 | 371147 | 371155