Attachment 359260 Details for Bug 193447 – Patch

[patch] Patch

bug-193447-20190116093405.patch (text/plain), 72.90 KB, created by Antoine Quint on 2019-01-16 00:34:07 PST

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Creator: Antoine Quint

Created: 2019-01-16 00:34:07 PST

Size: 72.90 KB

patch

obsolete

>Subversion Revision: 240032
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index d6adce9fbf75a41b2f62b65f3a293c916ec82cbb..e86a1a9f95ab8e6c0aafec078dbcaa37406aca78 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,66 @@
>+2019-01-15  Antoine Quint  <graouts@apple.com>
>+
>+        Limit user-agent interactions based on the touch-action property
>+        https://bugs.webkit.org/show_bug.cgi?id=193447
>+        <rdar://problem/47283874>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        We now compile a list of elements with a non-auto touch-action property that is updated whenever an element has its style changed
>+        or is removed from its document. When the content of that list changes, we inform the scrolling coordinator such that it can compute
>+        a Region containing the bounds of each of those elements and send it up to the UI process along with touch regions.
>+
>+        Additionally, we allow a list of allowed touch actions to be computed for a given element accounting for not only the value specified
>+        directly on that element's style, but also in its hierarchy, crossing any frame boundary towards the top-level document's root node.
>+
>+        Tests: pointerevents/ios/touch-action-conflicting-values-in-hierarchy.html
>+               pointerevents/ios/touch-action-none-in-iframe.html
>+               pointerevents/ios/touch-action-none-in-overflow-scrolling-touch.html
>+               pointerevents/ios/touch-action-none-on-iframe.html
>+               pointerevents/ios/touch-action-none-on-parent.html
>+               pointerevents/ios/touch-action-none.html
>+               pointerevents/ios/touch-action-pan-x-pan-y.html
>+               pointerevents/ios/touch-action-pan-x.html
>+               pointerevents/ios/touch-action-pan-y.html
>+               pointerevents/ios/touch-action-pinch-zoom-allows-zooming.html
>+               pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling.html               
>+
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * dom/Document.cpp:
>+        (WebCore::Document::nodeWillBeRemoved): Ensure a node that is being removed from this document is no longer listed in its
>+        list of elements with a non-auto touch-action property.
>+        (WebCore::Document::updateTouchActionElements): Create a list of elements with a non-auto touch-action property if one doesn't
>+        exist yet and update it to add the given element if it contains a non-auto touch-action, or remove it if it doesn't. If the contents
>+        of that list changed as a result, the scrolling coordinator is informed.
>+        * dom/Document.h:
>+        (WebCore::Document::touchActionElements const):
>+        * dom/Element.cpp:
>+        (WebCore::parentCrossingFrameBoundaries):
>+        (WebCore::Element::computedTouchActions const): Provide the list of allowed touch actions accounting for the "touch-action" property
>+        specified on this element and all of its hierarchy, crossing frame boundary.
>+        (WebCore::Element::nearestScrollingNodeIDUsingTouchOverflowScrolling const): Provide the ScrollingNodeID, if any, for the nearest scrolling node
>+        for that element. This will allow the UI process to identify which scroll view's behavior to customize to reflect the element's allowed
>+        touch actions.
>+        * dom/Element.h:
>+        * page/scrolling/ScrollingCoordinator.cpp:
>+        (WebCore::ScrollingCoordinator::absoluteEventTrackingRegionsForFrame const): Compute the region for all elements with a non-auto touch-action property
>+        throughout the provided frame and all of its subframes.
>+        * page/scrolling/ScrollingTree.cpp:
>+        (WebCore::ScrollingTree::mayHaveTouchActionsForPoint const): Provide a quick way to indentify whether the provided point is contained in the region
>+        of elements with a non-auto touch-action property.
>+        (WebCore::ScrollingTree::setTouchActionsForScrollingNodeID):
>+        * page/scrolling/ScrollingTree.h:
>+        * page/scrolling/ScrollingTreeNode.h:
>+        (WebCore::ScrollingTreeNode::touchActions const):
>+        (WebCore::ScrollingTreeNode::setTouchActions):
>+        * platform/EventTrackingRegions.cpp:
>+        (WebCore::operator==):
>+        * platform/EventTrackingRegions.h:
>+        * rendering/RenderLayer.cpp:
>+        (WebCore::RenderLayer::scrollTo): Ensure the region of elements with a non-auto touch-action property is updated when scrolling has occured.
>+        * style/StyleTreeResolver.cpp:
>+        (WebCore::Style::TreeResolver::resolveElement): Update the list of elements with a non-auto touch-action property when an element's style changes.
>+
> 2019-01-15  Fujii Hironori  <Hironori.Fujii@sony.com>
> 
>         Unreviewed WinCairo build fix.
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index bc216476e6a064f860d87e50dc8cee7454846413..122e11013c89db86c995950dc5d60ed475084279 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,58 @@
>+2019-01-15  Antoine Quint  <graouts@apple.com>
>+
>+        Limit user-agent interactions based on the touch-action property
>+        https://bugs.webkit.org/show_bug.cgi?id=193447
>+        <rdar://problem/47283874>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Handle the "none", "pan-x", "pan-y" and "pinch-zoom" values for the touch-action property by querying the scrolling tree whenever a touch begins
>+        to identify whether its point may be contained within the region of elements with a non-auto touch-action property. If it is, we call into the
>+        Web process, synchronously, to compile the list of permitted touch actions such that we may then customize the behavior of the nearest scroll view
>+        to pan or zoom only as instructed.
>+
>+        * Scripts/webkit/messages.py:
>+        * Shared/WebCoreArgumentCoders.cpp:
>+        (IPC::ArgumentCoder<EventTrackingRegions>::encode):
>+        (IPC::ArgumentCoder<EventTrackingRegions>::decode):
>+        * UIProcess/API/Cocoa/WKWebView.mm:
>+        (-[WKWebView scrollViewWillEndDragging:withVelocity:targetContentOffset:]): Account for panning constraints set on the content view to prevent deceleration
>+        to pan the view if it ought not.
>+        (-[WKWebView _scrollView:adjustedOffsetForOffset:translation:startPoint:locationInView:horizontalVelocity:verticalVelocity:]): Implement an additional UIScrollView
>+        delegation method to apply the panning constraints set on the content view while panning.
>+        * UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp:
>+        (WebKit::RemoteScrollingCoordinatorProxy::mayHaveTouchActionsForPoint const):
>+        (WebKit::RemoteScrollingCoordinatorProxy::setTouchActionsForScrollingNodeID):
>+        * UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h:
>+        * UIProcess/RemoteLayerTree/ios/ScrollingTreeScrollingNodeDelegateIOS.mm:
>+        (-[WKScrollingNodeScrollViewDelegate scrollViewWillEndDragging:withVelocity:targetContentOffset:]): Apply the same logic as in WKWebView.
>+        (-[WKScrollingNodeScrollViewDelegate scrollViewDidEndDragging:willDecelerate:]): Reset the touch actions for the associated scroll node to start the next interaction
>+        in the default state.
>+        (-[WKScrollingNodeScrollViewDelegate scrollViewDidEndDecelerating:]): Reset the touch actions for the associated scroll node to start the next interaction in the
>+        default state.
>+        (-[WKScrollingNodeScrollViewDelegate _scrollView:adjustedOffsetForOffset:translation:startPoint:locationInView:horizontalVelocity:verticalVelocity:]): Apply the same logic as in WKWebView.
>+        * UIProcess/WebPageProxy.h:
>+        (WebKit::WebPageProxy::isScrollingOrZooming const):
>+        * UIProcess/ios/WKContentViewInteraction.h:
>+        * UIProcess/ios/WKContentViewInteraction.mm:
>+        (-[WKContentView preventsPanningInXAxis]):
>+        (-[WKContentView preventsPanningInYAxis]):
>+        (-[WKContentView cleanupInteraction]): Reset the panning prevention ivars to their default state.
>+        (-[WKContentView _webTouchEventsRecognized:]): As we process touches, check whether there may be touch actions set for this touch's location, and if we haven't excluded
>+        that possibility, call into the Web process synchronously to find which touch actions these might be exactly. Then, based on those touch actions, either setDefaultPrevented
>+        on the _touchEventGestureRecognizer if the touch action is "none" or selectively disable panning and zooming as well as all the other tap-related user interactions.
>+        (-[WKContentView _resetPanningPreventionFlags]):
>+        (-[WKContentView _didEndScrollingOrZooming]):
>+        * UIProcess/ios/WebPageProxyIOS.mm:
>+        (WebKit::WebPageProxy::mayHaveTouchActionsForTouchEvent const): Check all touch points for a given event to see if it might have associated touch actions. This checks that
>+        these are new touches and that their location is contained within the touch action region computed in the Web process and sent to the UI process. 
>+        (WebKit::WebPageProxy::touchActionsForTouchEvent): 
>+        * WebProcess/WebPage/WebPage.h:
>+        * WebProcess/WebPage/WebPage.messages.in:
>+        * WebProcess/WebPage/ios/WebPageIOS.mm:
>+        (WebKit::WebPage::touchActionsForTouchEvent): Iterate over all touch points for a given event and return, if there is a non-auto touch action set, create a pair consisting of a
>+        list of touch-actions and the scrolling node ID for the nearest scroll node to the element that hit tests for this location.
>+
> 2019-01-15  Fujii Hironori  <Hironori.Fujii@sony.com>
> 
>         Unreviewed WinCairo build fix.
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index b96fa2dec41e49e314142d0b64522ba3c7924c6a..2978a67a41d2ea38343876fa8be86a4efb589669 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -31951,6 +31951,7 @@
> 				49E912AE0EFAC906009D0CAF /* TimingFunction.h in Headers */,
> 				0F54DD081881D5F5003EEDBB /* Touch.h in Headers */,
> 				71B7EE0D21B5C6870031C1EF /* TouchAction.h in Headers */,
>+				71B7EE0D21B5C6870031C1EF /* TouchAction.h in Headers */,
> 				0F54DD091881D5F5003EEDBB /* TouchEvent.h in Headers */,
> 				0F54DD0A1881D5F5003EEDBB /* TouchList.h in Headers */,
> 				070334D71459FFD5008D8D45 /* TrackBase.h in Headers */,
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index fe5c951bc64d662daec515f9e43ea4ec904e81c6..a98b4216caec9f3336c40512609b7685912d4c04 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -208,6 +208,7 @@
> #include "TextAutoSizing.h"
> #include "TextEvent.h"
> #include "TextNodeTraversal.h"
>+#include "TouchAction.h"
> #include "TransformSource.h"
> #include "TreeWalker.h"
> #include "UndoManager.h"
>@@ -4142,6 +4143,12 @@ void Document::invalidateRenderingDependentRegions(AnnotationsAction annotations
> 
> #if PLATFORM(IOS_FAMILY) && ENABLE(TOUCH_EVENTS)
>     setTouchEventRegionsNeedUpdate();
>+    if (auto* page = this->page()) {
>+        if (auto* frameView = view()) {
>+            if (auto* scrollingCoordinator = page->scrollingCoordinator())
>+                scrollingCoordinator->frameViewEventTrackingRegionsChanged(*frameView);
>+        }
>+    }
> #endif
> }
> 
>@@ -4526,6 +4533,11 @@ void Document::nodeWillBeRemoved(Node& node)
> 
>     if (is<Text>(node))
>         m_markers->removeMarkers(&node);
>+
>+#if ENABLE(TOUCH_EVENTS)
>+    if (m_touchActionElements)
>+        m_touchActionElements->removeAll(&node);
>+#endif
> }
> 
> static Node* fallbackFocusNavigationStartingNodeAfterRemoval(Node& node)
>@@ -8648,4 +8660,33 @@ void Document::setPaintWorkletGlobalScopeForName(const String& name, Ref<PaintWo
> }
> #endif
> 
>+#if ENABLE(TOUCH_EVENTS)
>+void Document::updateTouchActionElements(Node& node, RenderStyle* style)
>+{
>+    if (!m_touchActionElements)
>+        m_touchActionElements = std::make_unique<EventTargetSet>();
>+
>+    bool changed = false;
>+
>+    if (style && style->touchActions() != TouchAction::Auto)
>+        changed |= m_touchActionElements->add(&node).isNewEntry;
>+    else
>+        changed |= m_touchActionElements->removeAll(&node);
>+
>+#if ENABLE(TOUCH_EVENTS) && PLATFORM(IOS_FAMILY)
>+    if (!changed)
>+        return;
>+
>+    Page* page = this->page();
>+    if (!page)
>+        return;
>+
>+    if (FrameView* frameView = view()) {
>+        if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
>+            scrollingCoordinator->frameViewEventTrackingRegionsChanged(*frameView);
>+    }
>+#endif
>+}
>+#endif
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index eb44551ccaf34a09b89378aa871349771396e319..886888ea984a7473639f0e6e8b3cb3af915264e1 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -1273,6 +1273,7 @@ public:
> #if ENABLE(TOUCH_EVENTS)
>     bool hasTouchEventHandlers() const { return (m_touchEventTargets.get()) ? m_touchEventTargets->size() : false; }
>     bool touchEventTargetsContain(Node& node) const { return m_touchEventTargets ? m_touchEventTargets->contains(&node) : false; }
>+    void updateTouchActionElements(Node&, RenderStyle*);
> #else
>     bool hasTouchEventHandlers() const { return false; }
>     bool touchEventTargetsContain(Node&) const { return false; }
>@@ -1292,6 +1293,15 @@ public:
> #endif
>     }
> 
>+    const EventTargetSet* touchActionElements() const
>+    {
>+#if ENABLE(TOUCH_EVENTS)
>+        return m_touchActionElements.get();
>+#else
>+        return nullptr;
>+#endif
>+    }
>+
>     const EventTargetSet* wheelEventTargets() const { return m_wheelEventTargets.get(); }
> 
>     typedef std::pair<Region, bool> RegionFixedPair;
>@@ -1873,6 +1883,7 @@ private:
>     
> #if ENABLE(TOUCH_EVENTS)
>     std::unique_ptr<EventTargetSet> m_touchEventTargets;
>+    std::unique_ptr<EventTargetSet> m_touchActionElements;
> #endif
>     std::unique_ptr<EventTargetSet> m_wheelEventTargets;
> 
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index da5cd2f081c1e88f8111efff326df2026444c43a..42d5551439d05d5c7eabc2461fe90f166f5e73e1 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -81,6 +81,8 @@
> #include "PointerLockController.h"
> #include "RenderFragmentContainer.h"
> #include "RenderLayer.h"
>+#include "RenderLayerBacking.h"
>+#include "RenderLayerCompositor.h"
> #include "RenderListBox.h"
> #include "RenderTheme.h"
> #include "RenderTreeUpdater.h"
>@@ -3416,7 +3418,7 @@ void Element::setContainsFullScreenElement(bool flag)
>     invalidateStyleAndLayerComposition();
> }
> 
>-static Element* parentCrossingFrameBoundaries(Element* element)
>+static Element* parentCrossingFrameBoundaries(const Element* element)
> {
>     ASSERT(element);
>     return element->parentElement() ? element->parentElement() : element->document().ownerElement();
>@@ -4120,4 +4122,66 @@ void Element::setAttributeStyleMap(Ref<StylePropertyMap>&& map)
> }
> #endif
> 
>+#if ENABLE(TOUCH_EVENTS)
>+OptionSet<TouchAction> Element::computedTouchActions() const
>+{
>+    OptionSet<TouchAction> computedTouchActions = TouchAction::Auto;
>+    for (auto* element = this; element; element = parentCrossingFrameBoundaries(element)) {
>+        auto* renderer = element->renderer();
>+        if (!renderer)
>+            continue;
>+
>+        auto touchActions = renderer->style().touchActions();
>+
>+        // Once we've encountered touch-action: none, we know that this will be the computed value.
>+        if (touchActions == TouchAction::None)
>+            return touchActions;
>+
>+        // If the computed touch-action so far was "auto", we can just use the current element's touch-action.
>+        if (computedTouchActions == TouchAction::Auto) {
>+            computedTouchActions = touchActions;
>+            continue;
>+        }
>+
>+        // If the current element has touch-action: auto or the same touch-action as the computed touch-action,
>+        // we need to keep going up the ancestry chain.
>+        if (touchActions == TouchAction::Auto || touchActions == computedTouchActions)
>+            continue;
>+
>+        // Now, the element's touch-action and the computed touch-action are different and are neither "auto" nor "none".
>+        if (computedTouchActions == TouchAction::Manipulation) {
>+            // If the computed touch-action is "manipulation", we can take the current element's touch-action as the newly
>+            // computed touch-action.
>+            computedTouchActions = touchActions;
>+        } else if (touchActions == TouchAction::Manipulation) {
>+            // Otherwise, we have a restricted computed touch-action so far. If the current element's touch-action is "manipulation"
>+            // then we can just keep going and leave the computed touch-action untouched.
>+            continue;
>+        }
>+
>+        // In any other case, we have competing restrictive touch-action values that can only yield "none".
>+        return TouchAction::None;
>+    }
>+    return computedTouchActions;
>+}
>+#endif
>+
>+#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
>+ScrollingNodeID Element::nearestScrollingNodeIDUsingTouchOverflowScrolling() const
>+{
>+    if (!renderer())
>+        return 0;
>+
>+    // We are not interested in the root, so check that we also have a valid parent.
>+    for (auto* layer = renderer()->enclosingLayer(); layer && layer->parent(); layer = layer->parent()) {
>+        if (layer->isComposited()) {
>+            if (auto scrollingNodeID = layer->backing()->scrollingNodeIDForRole(ScrollCoordinationRole::Scrolling))
>+                return scrollingNodeID;
>+        }
>+    }
>+
>+    return 0;
>+}
>+#endif
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/dom/Element.h b/Source/WebCore/dom/Element.h
>index 169fde13adb627041fdd8b5e6f5b8f2adcb386f3..ed726c95b92150510a7555745d0257d84bc5126a 100644
>--- a/Source/WebCore/dom/Element.h
>+++ b/Source/WebCore/dom/Element.h
>@@ -31,6 +31,7 @@
> #include "KeyframeAnimationOptions.h"
> #include "ScrollToOptions.h"
> #include "ScrollTypes.h"
>+#include "ScrollingCoordinator.h"
> #include "ShadowRootMode.h"
> #include "SimulatedClickOptions.h"
> #include "StyleChange.h"
>@@ -56,6 +57,7 @@ class PseudoElement;
> class RenderTreePosition;
> class StylePropertyMap;
> class WebAnimation;
>+enum class TouchAction : uint8_t;
> struct ElementStyle;
> struct ScrollIntoViewOptions;
> 
>@@ -588,6 +590,14 @@ public:
>     ExceptionOr<Ref<WebAnimation>> animate(JSC::ExecState&, JSC::Strong<JSC::JSObject>&&, Optional<Variant<double, KeyframeAnimationOptions>>&&);
>     Vector<RefPtr<WebAnimation>> getAnimations();
> 
>+#if ENABLE(TOUCH_EVENTS)
>+    WEBCORE_EXPORT OptionSet<TouchAction> computedTouchActions() const;
>+#endif
>+
>+#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
>+    WEBCORE_EXPORT ScrollingNodeID nearestScrollingNodeIDUsingTouchOverflowScrolling() const;
>+#endif
>+
> protected:
>     Element(const QualifiedName&, Document&, ConstructionType);
> 
>diff --git a/Source/WebCore/page/scrolling/ScrollingCoordinator.cpp b/Source/WebCore/page/scrolling/ScrollingCoordinator.cpp
>index cb8738396a3a58ef4520ee548cf831eb415471b8..9ca7859aaf0e33ea7c22bcada15096f8c34c5d34 100644
>--- a/Source/WebCore/page/scrolling/ScrollingCoordinator.cpp
>+++ b/Source/WebCore/page/scrolling/ScrollingCoordinator.cpp
>@@ -99,7 +99,25 @@ EventTrackingRegions ScrollingCoordinator::absoluteEventTrackingRegionsForFrame(
>     auto* document = frame.document();
>     if (!document)
>         return EventTrackingRegions();
>-    return document->eventTrackingRegions();
>+    auto eventTrackingRegions = document->eventTrackingRegions();
>+    eventTrackingRegions.touchActionRegion = frame.document()->absoluteRegionForEventTargets(frame.document()->touchActionElements()).first;
>+
>+    for (auto* subframe = frame.tree().firstChild(); subframe; subframe = subframe->tree().nextSibling()) {
>+        auto* subframeView = subframe->view();
>+        if (!subframeView)
>+            continue;
>+
>+        if (auto* subframeDocument = subframe->document()) {
>+            auto subframeRegion = subframeDocument->absoluteRegionForEventTargets(subframeDocument->touchActionElements()).first;
>+            // Map from the frame document to our document.
>+            auto offset = subframeView->contentsToContainingViewContents(IntPoint());
>+            // FIXME: this translation ignores non-trival transforms on the frame.
>+            subframeRegion.translate(toIntSize(offset));
>+            eventTrackingRegions.touchActionRegion.unite(subframeRegion);
>+        }
>+    }
>+
>+    return eventTrackingRegions;
> #else
>     auto* frameView = frame.view();
>     if (!frameView)
>diff --git a/Source/WebCore/page/scrolling/ScrollingTree.cpp b/Source/WebCore/page/scrolling/ScrollingTree.cpp
>index 524393dd16aa637ff161d675b80ffd94e7aa1500..33a2ffb7c747e631de293964926c901e5dcbd7b6 100644
>--- a/Source/WebCore/page/scrolling/ScrollingTree.cpp
>+++ b/Source/WebCore/page/scrolling/ScrollingTree.cpp
>@@ -247,6 +247,11 @@ TrackingType ScrollingTree::eventTrackingTypeForPoint(const AtomicString& eventN
>     return m_eventTrackingRegions.trackingTypeForPoint(eventName, p);
> }
> 
>+bool ScrollingTree::mayHaveTouchActionsForPoint(const IntPoint p) const
>+{
>+    return m_eventTrackingRegions.touchActionRegion.contains(p);
>+}
>+
> bool ScrollingTree::isRubberBandInProgress()
> {
>     LockHolder lock(m_mutex);    
>@@ -403,6 +408,12 @@ String ScrollingTree::scrollingTreeAsText()
>     return ts.release();
> }
> 
>+void ScrollingTree::setTouchActionsForScrollingNodeID(OptionSet<TouchAction> touchActions, ScrollingNodeID scrollingNodeID)
>+{
>+    if (auto* scrollingTreeNode = nodeForID(scrollingNodeID))
>+        scrollingTreeNode->setTouchActions(touchActions);
>+}
>+
> } // namespace WebCore
> 
> #endif // ENABLE(ASYNC_SCROLLING)
>diff --git a/Source/WebCore/page/scrolling/ScrollingTree.h b/Source/WebCore/page/scrolling/ScrollingTree.h
>index efc68415c39430df7f27043fe982332775567632..3693332eb36ef1d9a8a440e577dbdbcc70039b98 100644
>--- a/Source/WebCore/page/scrolling/ScrollingTree.h
>+++ b/Source/WebCore/page/scrolling/ScrollingTree.h
>@@ -30,6 +30,7 @@
> #include "PlatformWheelEvent.h"
> #include "Region.h"
> #include "ScrollingCoordinator.h"
>+#include "TouchAction.h"
> #include "WheelEventTestTrigger.h"
> #include <wtf/HashMap.h>
> #include <wtf/Lock.h>
>@@ -104,7 +105,8 @@ public:
> #endif
> 
>     WEBCORE_EXPORT TrackingType eventTrackingTypeForPoint(const AtomicString& eventName, IntPoint);
>-    
>+    WEBCORE_EXPORT bool mayHaveTouchActionsForPoint(const IntPoint) const;
>+
> #if PLATFORM(MAC)
>     virtual void handleWheelEventPhase(PlatformWheelEventPhase) = 0;
>     virtual void setActiveScrollSnapIndices(ScrollingNodeID, unsigned /*horizontalIndex*/, unsigned /*verticalIndex*/) { }
>@@ -151,6 +153,7 @@ public:
>     }
>     
>     WEBCORE_EXPORT String scrollingTreeAsText();
>+    WEBCORE_EXPORT void setTouchActionsForScrollingNodeID(OptionSet<TouchAction>, ScrollingNodeID);
>     
> protected:
>     void setMainFrameScrollPosition(FloatPoint);
>diff --git a/Source/WebCore/page/scrolling/ScrollingTreeNode.h b/Source/WebCore/page/scrolling/ScrollingTreeNode.h
>index bf7f61a361b93b47dfe434e05f93288ccf590bb6..fab7f4ae615ea6c381e5bf76b5a90213f302ab5a 100644
>--- a/Source/WebCore/page/scrolling/ScrollingTreeNode.h
>+++ b/Source/WebCore/page/scrolling/ScrollingTreeNode.h
>@@ -31,6 +31,7 @@
> #include "ScrollTypes.h"
> #include "ScrollingCoordinator.h"
> #include "ScrollingStateNode.h"
>+#include "TouchAction.h"
> #include <wtf/RefCounted.h>
> #include <wtf/TypeCasts.h>
> 
>@@ -70,6 +71,9 @@ public:
> 
>     WEBCORE_EXPORT void dump(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const;
> 
>+    OptionSet<TouchAction> touchActions() const { return m_touchActions; }
>+    void setTouchActions(OptionSet<TouchAction> touchActions) { m_touchActions = touchActions; }
>+
> protected:
>     ScrollingTreeNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
>     ScrollingTree& scrollingTree() const { return m_scrollingTree; }
>@@ -85,6 +89,7 @@ private:
>     const ScrollingNodeID m_nodeID;
> 
>     ScrollingTreeNode* m_parent;
>+    OptionSet<TouchAction> m_touchActions;
> };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/EventTrackingRegions.cpp b/Source/WebCore/platform/EventTrackingRegions.cpp
>index 7e763c8953dca8e6dd7cacad6252407c70c5f863..9fbe1008a136db33fa1b84195b304e536b5208c2 100644
>--- a/Source/WebCore/platform/EventTrackingRegions.cpp
>+++ b/Source/WebCore/platform/EventTrackingRegions.cpp
>@@ -73,7 +73,8 @@ void EventTrackingRegions::unite(const EventTrackingRegions& eventTrackingRegion
> bool operator==(const EventTrackingRegions& a, const EventTrackingRegions& b)
> {
>     return a.asynchronousDispatchRegion == b.asynchronousDispatchRegion
>-        && a.eventSpecificSynchronousDispatchRegions == b.eventSpecificSynchronousDispatchRegions;
>+        && a.eventSpecificSynchronousDispatchRegions == b.eventSpecificSynchronousDispatchRegions
>+        && a.touchActionRegion == b.touchActionRegion;
> }
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/platform/EventTrackingRegions.h b/Source/WebCore/platform/EventTrackingRegions.h
>index 3d58ba55efd63ed9bae40501e309b861fc9e9c05..bbcdbda3aaa6fd1da11c864c1cb77ab1167c43fe 100644
>--- a/Source/WebCore/platform/EventTrackingRegions.h
>+++ b/Source/WebCore/platform/EventTrackingRegions.h
>@@ -46,6 +46,8 @@ struct EventTrackingRegions {
>     // The key is the Event Name with an active handler.
>     HashMap<String, Region> eventSpecificSynchronousDispatchRegions;
> 
>+    Region touchActionRegion;
>+
>     bool isEmpty() const;
> 
>     void translate(IntSize);
>diff --git a/Source/WebCore/style/StyleTreeResolver.cpp b/Source/WebCore/style/StyleTreeResolver.cpp
>index 34f8f3c3c86e3fdf95f18606b6aca6132e5d8ee3..90917139713b3acdc32bf2c5d6be7557d0b16fdb 100644
>--- a/Source/WebCore/style/StyleTreeResolver.cpp
>+++ b/Source/WebCore/style/StyleTreeResolver.cpp
>@@ -232,6 +232,10 @@ ElementUpdates TreeResolver::resolveElement(Element& element)
>     auto beforeUpdate = resolvePseudoStyle(element, update, PseudoId::Before);
>     auto afterUpdate = resolvePseudoStyle(element, update, PseudoId::After);
> 
>+#if ENABLE(TOUCH_EVENTS)
>+    m_document.updateTouchActionElements(element, update.style.get());
>+#endif
>+
>     return { WTFMove(update), descendantsToResolve, WTFMove(beforeUpdate), WTFMove(afterUpdate) };
> }
> 
>diff --git a/Source/WebKit/Scripts/webkit/messages.py b/Source/WebKit/Scripts/webkit/messages.py
>index c774bc41c8294f0811671d6b74ca86d48ee17944..7a475a1638c60eeb53b172e8df02e5ddc09a8adb 100644
>--- a/Source/WebKit/Scripts/webkit/messages.py
>+++ b/Source/WebKit/Scripts/webkit/messages.py
>@@ -422,6 +422,7 @@ def headers_for_type(type):
>         'WebCore::RecentSearch': ['<WebCore/SearchPopupMenu.h>'],
>         'WebCore::RouteSharingPolicy': ['<WebCore/AudioSession.h>'],
>         'WebCore::SWServerConnectionIdentifier': ['<WebCore/ServiceWorkerTypes.h>'],
>+        'WebCore::ScrollingNodeID': ['<WebCore/ScrollingCoordinator.h>'],
>         'WebCore::ServiceWorkerJobIdentifier': ['<WebCore/ServiceWorkerTypes.h>'],
>         'WebCore::ServiceWorkerOrClientData': ['<WebCore/ServiceWorkerTypes.h>', '<WebCore/ServiceWorkerClientData.h>', '<WebCore/ServiceWorkerData.h>'],
>         'WebCore::ServiceWorkerOrClientIdentifier': ['<WebCore/ServiceWorkerTypes.h>', '<WebCore/ServiceWorkerClientIdentifier.h>'],
>diff --git a/Source/WebKit/Shared/WebCoreArgumentCoders.cpp b/Source/WebKit/Shared/WebCoreArgumentCoders.cpp
>index 3b0529a4a959a23bd5d040f5fa008ad7b0fec71f..164953bcb61a94b3f43f9e5f28f162a937c5d098 100644
>--- a/Source/WebKit/Shared/WebCoreArgumentCoders.cpp
>+++ b/Source/WebKit/Shared/WebCoreArgumentCoders.cpp
>@@ -333,6 +333,7 @@ void ArgumentCoder<EventTrackingRegions>::encode(Encoder& encoder, const EventTr
> {
>     encoder << eventTrackingRegions.asynchronousDispatchRegion;
>     encoder << eventTrackingRegions.eventSpecificSynchronousDispatchRegions;
>+    encoder << eventTrackingRegions.touchActionRegion;
> }
> 
> bool ArgumentCoder<EventTrackingRegions>::decode(Decoder& decoder, EventTrackingRegions& eventTrackingRegions)
>@@ -343,8 +344,12 @@ bool ArgumentCoder<EventTrackingRegions>::decode(Decoder& decoder, EventTracking
>     HashMap<String, Region> eventSpecificSynchronousDispatchRegions;
>     if (!decoder.decode(eventSpecificSynchronousDispatchRegions))
>         return false;
>+    Region touchActionRegion;
>+    if (!decoder.decode(touchActionRegion))
>+        return false;
>     eventTrackingRegions.asynchronousDispatchRegion = WTFMove(asynchronousDispatchRegion);
>     eventTrackingRegions.eventSpecificSynchronousDispatchRegions = WTFMove(eventSpecificSynchronousDispatchRegions);
>+    eventTrackingRegions.touchActionRegion = WTFMove(touchActionRegion);
>     return true;
> }
> 
>diff --git a/Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm b/Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm
>index 074cddfd2784e869128d020bed59213a1cbdde68..0fde781c57818d73cbc40288dac0e1b795d9d329 100644
>--- a/Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm
>+++ b/Source/WebKit/UIProcess/API/Cocoa/WKWebView.mm
>@@ -2580,6 +2580,12 @@ - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoi
>     // zooming. We'll animate to the right place once the zoom finishes.
>     if ([scrollView isZooming])
>         *targetContentOffset = [scrollView contentOffset];
>+    else {
>+        if ([_contentView preventsPanningInXAxis])
>+            targetContentOffset->x = scrollView.contentOffset.x;
>+        if ([_contentView preventsPanningInYAxis])
>+            targetContentOffset->y = scrollView.contentOffset.y;
>+    }
> #if ENABLE(CSS_SCROLL_SNAP) && ENABLE(ASYNC_SCROLLING)
>     if (WebKit::RemoteScrollingCoordinatorProxy* coordinator = _page->scrollingCoordinatorProxy()) {
>         // FIXME: Here, I'm finding the maximum horizontal/vertical scroll offsets. There's probably a better way to do this.
>@@ -2617,6 +2623,20 @@ - (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
>     [self _didFinishScrolling];
> }
> 
>+- (CGPoint)_scrollView:(UIScrollView *)scrollView adjustedOffsetForOffset:(CGPoint)offset translation:(CGPoint)translation startPoint:(CGPoint)start locationInView:(CGPoint)locationInView horizontalVelocity:(inout double *)hv verticalVelocity:(inout double *)vv
>+{
>+    if (![_contentView preventsPanningInXAxis] && ![_contentView preventsPanningInYAxis])
>+        return offset;
>+
>+    CGPoint adjustedContentOffset = CGPointMake(offset.x, offset.y);
>+    if ([_contentView preventsPanningInXAxis])
>+        adjustedContentOffset.x = start.x;
>+    if ([_contentView preventsPanningInYAxis])
>+        adjustedContentOffset.y = start.y;
>+
>+    return adjustedContentOffset;
>+}
>+
> - (void)scrollViewDidScroll:(UIScrollView *)scrollView
> {
>     if (![self usesStandardContentView] && [_customContentView respondsToSelector:@selector(web_scrollViewDidScroll:)])
>diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>index a367e15f00536f8cb5c850907ab43a7c3166730a..1c2a551f307747892d0787920c2feb76dcf7a921 100644
>--- a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>+++ b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.cpp
>@@ -164,6 +164,11 @@ TrackingType RemoteScrollingCoordinatorProxy::eventTrackingTypeForPoint(const At
>     return m_scrollingTree->eventTrackingTypeForPoint(eventName, p);
> }
> 
>+bool RemoteScrollingCoordinatorProxy::mayHaveTouchActionsForPoint(IntPoint p) const
>+{
>+    return m_scrollingTree->mayHaveTouchActionsForPoint(p);
>+}
>+
> void RemoteScrollingCoordinatorProxy::viewportChangedViaDelegatedScrolling(ScrollingNodeID nodeID, const FloatRect& fixedPositionRect, double scale)
> {
>     m_scrollingTree->viewportChangedViaDelegatedScrolling(nodeID, fixedPositionRect, scale);
>@@ -205,6 +210,12 @@ String RemoteScrollingCoordinatorProxy::scrollingTreeAsText() const
>     return emptyString();
> }
> 
>+void RemoteScrollingCoordinatorProxy::setTouchActionsForScrollingNodeID(OptionSet<TouchAction> touchActions, ScrollingNodeID scrollingNodeID)
>+{
>+
>+    m_scrollingTree->setTouchActionsForScrollingNodeID(touchActions, scrollingNodeID);
>+}
>+
> } // namespace WebKit
> 
> #endif // ENABLE(ASYNC_SCROLLING)
>diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>index b32d79fe9289b1457c8ead2d8d35c3b79daec96a..c698729cb79e7d8075e2562cb4add7fd2beda8aa 100644
>--- a/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>+++ b/Source/WebKit/UIProcess/RemoteLayerTree/RemoteScrollingCoordinatorProxy.h
>@@ -58,6 +58,7 @@ public:
>     void scrollingTreeNodeRequestsScroll(WebCore::ScrollingNodeID, const WebCore::FloatPoint& scrollPosition, bool representsProgrammaticScroll);
> 
>     WebCore::TrackingType eventTrackingTypeForPoint(const AtomicString& eventName, WebCore::IntPoint) const;
>+    bool mayHaveTouchActionsForPoint(WebCore::IntPoint) const;
> 
>     // Called externally when native views move around.
>     void viewportChangedViaDelegatedScrolling(WebCore::ScrollingNodeID, const WebCore::FloatRect& fixedPositionRect, double scale);
>@@ -97,6 +98,7 @@ public:
> #endif
> 
>     String scrollingTreeAsText() const;
>+    void setTouchActionsForScrollingNodeID(OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID);
> 
> private:
>     void connectStateNodeLayers(WebCore::ScrollingStateTree&, const RemoteLayerTreeHost&);
>diff --git a/Source/WebKit/UIProcess/RemoteLayerTree/ios/ScrollingTreeScrollingNodeDelegateIOS.mm b/Source/WebKit/UIProcess/RemoteLayerTree/ios/ScrollingTreeScrollingNodeDelegateIOS.mm
>index 4cc7e1a87b85ac70637e15f44cc1e4f8f9219c4c..1813eefdada41868293a17218a46ffec241f9b0a 100644
>--- a/Source/WebKit/UIProcess/RemoteLayerTree/ios/ScrollingTreeScrollingNodeDelegateIOS.mm
>+++ b/Source/WebKit/UIProcess/RemoteLayerTree/ios/ScrollingTreeScrollingNodeDelegateIOS.mm
>@@ -67,9 +67,25 @@ - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
>     _scrollingTreeNodeDelegate->scrollWillStart();
> }
> 
>-#if ENABLE(CSS_SCROLL_SNAP)
> - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
> {
>+    if (![scrollView isZooming]) {
>+        auto touchActions = _scrollingTreeNodeDelegate->scrollingNode().touchActions();
>+        if (touchActions != WebCore::TouchAction::Auto && touchActions != WebCore::TouchAction::Manipulation) {
>+            bool canPanX = true;
>+            bool canPanY = true;
>+            if (!touchActions.contains(WebCore::TouchAction::PanX)) {
>+                canPanX = false;
>+                targetContentOffset->x = scrollView.contentOffset.x;
>+            }
>+            if (!touchActions.contains(WebCore::TouchAction::PanY)) {
>+                canPanY = false;
>+                targetContentOffset->y = scrollView.contentOffset.y;
>+            }
>+        }
>+    }
>+
>+#if ENABLE(CSS_SCROLL_SNAP)
>     CGFloat horizontalTarget = targetContentOffset->x;
>     CGFloat verticalTarget = targetContentOffset->y;
> 
>@@ -96,8 +112,8 @@ - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoi
>         || originalVerticalSnapPosition != _scrollingTreeNodeDelegate->scrollingNode().currentVerticalSnapPointIndex()) {
>         _scrollingTreeNodeDelegate->currentSnapPointIndicesDidChange(_scrollingTreeNodeDelegate->scrollingNode().currentHorizontalSnapPointIndex(), _scrollingTreeNodeDelegate->scrollingNode().currentVerticalSnapPointIndex());
>     }
>-}
> #endif
>+}
> 
> - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)willDecelerate
> {
>@@ -105,6 +121,7 @@ - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL
>         _inUserInteraction = NO;
>         _scrollingTreeNodeDelegate->scrollViewDidScroll(scrollView.contentOffset, _inUserInteraction);
>         _scrollingTreeNodeDelegate->scrollDidEnd();
>+        _scrollingTreeNodeDelegate->scrollingNode().setTouchActions(WebCore::TouchAction::Auto);
>     }
> }
> 
>@@ -114,9 +131,32 @@ - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
>         _inUserInteraction = NO;
>         _scrollingTreeNodeDelegate->scrollViewDidScroll(scrollView.contentOffset, _inUserInteraction);
>         _scrollingTreeNodeDelegate->scrollDidEnd();
>+        _scrollingTreeNodeDelegate->scrollingNode().setTouchActions(WebCore::TouchAction::Auto);
>     }
> }
> 
>+- (CGPoint)_scrollView:(UIScrollView *)scrollView adjustedOffsetForOffset:(CGPoint)offset translation:(CGPoint)translation startPoint:(CGPoint)start locationInView:(CGPoint)locationInView horizontalVelocity:(inout double *)hv verticalVelocity:(inout double *)vv
>+{
>+    auto touchActions = _scrollingTreeNodeDelegate->scrollingNode().touchActions();
>+    if (touchActions == WebCore::TouchAction::Auto || touchActions == WebCore::TouchAction::Manipulation)
>+        return offset;
>+
>+    CGPoint adjustedContentOffset = CGPointMake(offset.x, offset.y);
>+
>+    bool canPanX = true;
>+    bool canPanY = true;
>+    if (!touchActions.contains(WebCore::TouchAction::PanX)) {
>+        adjustedContentOffset.x = start.x;
>+        canPanX = false;
>+    }
>+    if (!touchActions.contains(WebCore::TouchAction::PanY)) {
>+        adjustedContentOffset.y = start.y;
>+        canPanY = false;
>+    }
>+
>+    return adjustedContentOffset;
>+}
>+
> @end
> 
> namespace WebKit {
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.h b/Source/WebKit/UIProcess/WebPageProxy.h
>index de98694aa37db3c7f2ce27cc829a9200211de10d..58e09943ee64011146d0384f66f0cadce6bc207f 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.h
>+++ b/Source/WebKit/UIProcess/WebPageProxy.h
>@@ -81,9 +81,11 @@
> #include <WebCore/MediaProducer.h>
> #include <WebCore/PlatformScreen.h>
> #include <WebCore/ScrollTypes.h>
>+#include <WebCore/ScrollingCoordinator.h>
> #include <WebCore/SearchPopupMenu.h>
> #include <WebCore/TextChecking.h>
> #include <WebCore/TextGranularity.h>
>+#include <WebCore/TouchAction.h>
> #include <WebCore/UserInterfaceLayoutDirection.h>
> #include <memory>
> #include <wtf/CompletionHandler.h>
>@@ -680,6 +682,7 @@ public:
>     void requestStartDataInteraction(const WebCore::IntPoint& clientPosition, const WebCore::IntPoint& globalPosition);
>     void requestAdditionalItemsForDragSession(const WebCore::IntPoint& clientPosition, const WebCore::IntPoint& globalPosition);
>     void didConcludeEditDataInteraction(Optional<WebCore::TextIndicatorData>);
>+bool isScrollingOrZooming() const { return m_isScrollingOrZooming; }
> #endif
> #endif
> #if ENABLE(DATA_DETECTION)
>@@ -1156,6 +1159,10 @@ public:
>     void cancelPotentialTap();
>     void tapHighlightAtPosition(const WebCore::FloatPoint&, uint64_t& requestID);
>     void handleTap(const WebCore::FloatPoint&, uint64_t layerTreeTransactionIdAtLastTouchStart);
>+#if ENABLE(IOS_TOUCH_EVENTS)
>+    bool mayHaveTouchActionsForTouchEvent(const WebTouchEvent&) const;
>+    Vector<std::pair<OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID>> touchActionsForTouchEvent(const WebTouchEvent&);
>+#endif
> 
>     void inspectorNodeSearchMovedToPosition(const WebCore::FloatPoint&);
>     void inspectorNodeSearchEndedAtPosition(const WebCore::FloatPoint&);
>diff --git a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>index a7ffff78f30a70f4fc590d705a1d19e3a3881bef..d688a1120fb9d7a45b4afadd1c78978db83b5c83 100644
>--- a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>+++ b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>@@ -196,6 +196,8 @@ struct WKAutoCorrectionData {
>     RetainPtr<UIWebTouchEventsGestureRecognizer> _touchEventGestureRecognizer;
> 
>     BOOL _canSendTouchEventsAsynchronously;
>+    BOOL _preventsPanningInXAxis;
>+    BOOL _preventsPanningInYAxis;
> 
>     RetainPtr<WKSyntheticClickTapGestureRecognizer> _singleTapGestureRecognizer;
>     RetainPtr<_UIWebHighlightLongPressGestureRecognizer> _highlightLongPressGestureRecognizer;
>@@ -349,6 +351,8 @@ struct WKAutoCorrectionData {
> @property (nonatomic, readonly) const WebKit::FocusedElementInformation& focusedElementInformation;
> @property (nonatomic, readonly) UIWebFormAccessory *formAccessoryView;
> @property (nonatomic, readonly) UITextInputAssistantItem *inputAssistantItemForWebView;
>+@property (nonatomic, readonly) BOOL preventsPanningInXAxis;
>+@property (nonatomic, readonly) BOOL preventsPanningInYAxis;
> 
> #if ENABLE(DATALIST_ELEMENT)
> @property (nonatomic, strong) UIView <WKFormControl> *dataListTextSuggestionsInputView;
>diff --git a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>index 3e5292a78c2acf461a68293b3aac422c90d7b3c5..9c5efb0bd0a21a6e5b373508fb12c27274f39405 100644
>--- a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>+++ b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>@@ -37,6 +37,7 @@
> #import "NativeWebKeyboardEvent.h"
> #import "NativeWebTouchEvent.h"
> #import "RemoteLayerTreeDrawingAreaProxy.h"
>+#import "RemoteScrollingCoordinatorProxy.h"
> #import "SmartMagnificationController.h"
> #import "TextInputSPI.h"
> #import "UIKitSPI.h"
>@@ -91,6 +92,7 @@
> #import <WebCore/Scrollbar.h>
> #import <WebCore/ShareData.h>
> #import <WebCore/TextIndicator.h>
>+#import <WebCore/TouchAction.h>
> #import <WebCore/VisibleSelection.h>
> #import <WebCore/WebEvent.h>
> #import <WebCore/WritingDirection.h>
>@@ -615,6 +617,16 @@ static inline bool hasFocusedElement(WebKit::FocusedElementInformation focusedEl
>     return (focusedElementInformation.elementType != WebKit::InputType::None);
> }
> 
>+- (BOOL)preventsPanningInXAxis
>+{
>+    return _preventsPanningInXAxis;
>+}
>+
>+- (BOOL)preventsPanningInYAxis
>+{
>+    return _preventsPanningInYAxis;
>+}
>+
> - (WKFormInputSession *)_formInputSession
> {
>     return _formInputSession.get();
>@@ -861,6 +873,9 @@ - (void)cleanupInteraction
>     _hasSetUpInteractions = NO;
>     _suppressSelectionAssistantReasons = { };
>     _isZoomingToRevealFocusedElement = NO;
>+
>+    _preventsPanningInXAxis = NO;
>+    _preventsPanningInYAxis = NO;
> }
> 
> - (void)_removeDefaultGestureRecognizers
>@@ -1128,16 +1143,56 @@ - (void)_webTouchEventsRecognized:(UIWebTouchEventsGestureRecognizer *)gestureRe
>     WebKit::NativeWebTouchEvent nativeWebTouchEvent(lastTouchEvent);
>     nativeWebTouchEvent.setCanPreventNativeGestures(!_canSendTouchEventsAsynchronously || [gestureRecognizer isDefaultPrevented]);
> 
>+    if (_page->mayHaveTouchActionsForTouchEvent(nativeWebTouchEvent)) {
>+        for (auto touchActionsAndScrollingNodeIDPair : _page->touchActionsForTouchEvent(nativeWebTouchEvent)) {
>+            auto touchActions = touchActionsAndScrollingNodeIDPair.first;
>+            if (touchActions == WebCore::TouchAction::None)
>+                [_touchEventGestureRecognizer setDefaultPrevented:YES];
>+            else {
>+                // Disable all tap-related recognizers.
>+                [_singleTapGestureRecognizer setEnabled:NO];
>+                [_nonBlockingDoubleTapGestureRecognizer setEnabled:NO];
>+                [_twoFingerDoubleTapGestureRecognizer setEnabled:NO];
>+                [_highlightLongPressGestureRecognizer setEnabled:NO];
>+                [_twoFingerSingleTapGestureRecognizer setEnabled:NO];
>+                [_stylusSingleTapGestureRecognizer setEnabled:NO];
>+                [_doubleTapGestureRecognizer setEnabled:NO];
>+                [_longPressGestureRecognizer setEnabled:NO];
>+                if (!touchActions.contains(WebCore::TouchAction::Manipulation)) {
>+                    if (auto scrollingNodeID = touchActionsAndScrollingNodeIDPair.second) {
>+                        if (auto* scrollingCoordinator = _page->scrollingCoordinatorProxy())
>+                            scrollingCoordinator->setTouchActionsForScrollingNodeID(touchActions, scrollingNodeID);
>+                    } else {
>+                        if (!touchActions.contains(WebCore::TouchAction::PinchZoom))
>+                            _webView.scrollView.pinchGestureRecognizer.enabled = NO;
>+                        _preventsPanningInXAxis = !touchActions.contains(WebCore::TouchAction::PanX);
>+                        _preventsPanningInYAxis = !touchActions.contains(WebCore::TouchAction::PanY);
>+                    }
>+                }
>+            }
>+        }
>+    }
>+
>     if (_canSendTouchEventsAsynchronously)
>         _page->handleTouchEventAsynchronously(nativeWebTouchEvent);
>     else
>         _page->handleTouchEventSynchronously(nativeWebTouchEvent);
> 
>-    if (nativeWebTouchEvent.allTouchPointsAreReleased())
>+    if (nativeWebTouchEvent.allTouchPointsAreReleased()) {
>         _canSendTouchEventsAsynchronously = NO;
>+
>+        if (!_page->isScrollingOrZooming())
>+            [self _resetPanningPreventionFlags];
>+    }
> #endif
> }
> 
>+- (void)_resetPanningPreventionFlags
>+{
>+    _preventsPanningInXAxis = NO;
>+    _preventsPanningInYAxis = NO;
>+}
>+
> - (void)_inspectorNodeSearchRecognized:(UIGestureRecognizer *)gestureRecognizer
> {
>     ASSERT(_inspectorNodeSearchEnabled);
>@@ -2194,6 +2249,8 @@ - (void)_didEndScrollingOrZooming
>     }
>     _page->setIsScrollingOrZooming(false);
> 
>+    [self _resetPanningPreventionFlags];
>+
> #if PLATFORM(WATCHOS)
>     [_focusedFormControlView engageFocusedFormControlNavigation];
> #endif
>diff --git a/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm b/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm
>index b9bd70c9bee1069e1b4f123098b9cae12d6487c5..a774bda093b0ed79c50cdfb8ea7587905b97420d 100644
>--- a/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm
>+++ b/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm
>@@ -41,6 +41,7 @@
> #import "RemoteLayerTreeDrawingAreaProxy.h"
> #import "RemoteLayerTreeDrawingAreaProxyMessages.h"
> #import "RemoteLayerTreeTransaction.h"
>+#import "RemoteScrollingCoordinatorProxy.h"
> #import "UIKitSPI.h"
> #import "UserData.h"
> #import "VideoFullscreenManagerProxy.h"
>@@ -824,6 +825,24 @@ void WebPageProxy::potentialTapAtPosition(const WebCore::FloatPoint& position, u
>     process().send(Messages::WebPage::PotentialTapAtPosition(requestID, position), m_pageID);
> }
> 
>+#if ENABLE(IOS_TOUCH_EVENTS)
>+bool WebPageProxy::mayHaveTouchActionsForTouchEvent(const WebTouchEvent& event) const
>+{
>+    for (auto& touchPoint : event.touchPoints()) {
>+        if (touchPoint.phase() == WebPlatformTouchPoint::TouchPressed && m_scrollingCoordinatorProxy->mayHaveTouchActionsForPoint(touchPoint.location()))
>+            return true;
>+    }
>+    return false;
>+}
>+
>+Vector<std::pair<OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID>> WebPageProxy::touchActionsForTouchEvent(const WebTouchEvent& event)
>+{
>+    Vector<std::pair<OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID>> touchActions;
>+    process().sendSync(Messages::WebPage::TouchActionsForTouchEvent(event), Messages::WebPage::TouchActionsForTouchEvent::Reply(touchActions), m_pageID);
>+    return touchActions;
>+}
>+#endif
>+
> void WebPageProxy::commitPotentialTap(uint64_t layerTreeTransactionIdAtLastTouchStart)
> {
>     process().send(Messages::WebPage::CommitPotentialTap(layerTreeTransactionIdAtLastTouchStart), m_pageID);
>diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.h b/Source/WebKit/WebProcess/WebPage/WebPage.h
>index 715e124520ff076b960aed70e9b92075a6552aef..e7875f936d3e1d511e76dfd905cd57020d6afb94 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebPage.h
>+++ b/Source/WebKit/WebProcess/WebPage/WebPage.h
>@@ -618,6 +618,9 @@ public:
>     void cancelPotentialTap();
>     void cancelPotentialTapInFrame(WebFrame&);
>     void tapHighlightAtPosition(uint64_t requestID, const WebCore::FloatPoint&);
>+#if ENABLE(IOS_TOUCH_EVENTS)
>+    void touchActionsForTouchEvent(const WebTouchEvent&, Vector<std::pair<OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID>>&);
>+#endif
> 
>     void inspectorNodeSearchMovedToPosition(const WebCore::FloatPoint&);
>     void inspectorNodeSearchEndedAtPosition(const WebCore::FloatPoint&);
>diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.messages.in b/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
>index 54abbaf8934ccdcf8e4f20f783fcb6b9f03040eb..97a9ff64870f1017f177c91903f9eb93c19e4d41 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
>+++ b/Source/WebKit/WebProcess/WebPage/WebPage.messages.in
>@@ -122,6 +122,7 @@ messages -> WebPage LegacyReceiver {
> 
> #if ENABLE(IOS_TOUCH_EVENTS)
>     TouchEventSync(WebKit::WebTouchEvent event) -> (bool handled) LegacySync
>+    TouchActionsForTouchEvent(WebKit::WebTouchEvent event) -> (Vector<std::pair<OptionSet<WebCore::TouchAction>, WebCore::ScrollingNodeID>> touchActions) LegacySync
> #endif
> #if !ENABLE(IOS_TOUCH_EVENTS) && ENABLE(TOUCH_EVENTS)
>     TouchEvent(WebKit::WebTouchEvent event)
>diff --git a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>index 06696c065cc7748c1cbde00545e37364ea694e53..767836be31fd46f4dfea5c97b6789492fd26222b 100644
>--- a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>+++ b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>@@ -103,6 +103,7 @@
> #import <WebCore/PlatformMouseEvent.h>
> #import <WebCore/RenderBlock.h>
> #import <WebCore/RenderImage.h>
>+#import <WebCore/RenderLayerBacking.h>
> #import <WebCore/RenderThemeIOS.h>
> #import <WebCore/RenderView.h>
> #import <WebCore/RuntimeApplicationChecks.h>
>@@ -862,6 +863,29 @@ void WebPage::tapHighlightAtPosition(uint64_t requestID, const FloatPoint& posit
>     sendTapHighlightForNodeIfNecessary(requestID, mainframe.nodeRespondingToClickEvents(position, adjustedPoint));
> }
> 
>+#if ENABLE(IOS_TOUCH_EVENTS)
>+void WebPage::touchActionsForTouchEvent(const WebTouchEvent& event, Vector<std::pair<OptionSet<TouchAction>, ScrollingNodeID>>& touchActions)
>+{
>+    layoutIfNeeded();
>+
>+    auto& eventHandler = m_page->mainFrame().eventHandler();
>+    for (auto& touch : event.touchPoints()) {
>+        auto result = eventHandler.hitTestResultAtPoint((touch.location()), HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::DisallowUserAgentShadowContent | HitTestRequest::AllowChildFrameContent);
>+        std::pair<OptionSet<TouchAction>, ScrollingNodeID> touchActionsAndScrollingNodeIDPair;
>+        if (auto* element = result.innerNonSharedElement()) {
>+            touchActionsAndScrollingNodeIDPair.first = element->computedTouchActions();
>+#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
>+            // Now we should also look to see if our element is or is contained within an "overflow-scroll: touch" element
>+            // so that we can report its layer id to the UI process.
>+            if (auto scrollingNodeID = element->nearestScrollingNodeIDUsingTouchOverflowScrolling())
>+                touchActionsAndScrollingNodeIDPair.second = scrollingNodeID;
>+#endif
>+        }
>+        touchActions.append(touchActionsAndScrollingNodeIDPair);
>+    }
>+}
>+#endif
>+
> void WebPage::inspectorNodeSearchMovedToPosition(const FloatPoint& position)
> {
>     IntPoint adjustedPoint = roundedIntPoint(position);
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 173660a6d6d39314c27e7cb00e7b3c974ef2ca3e..4acc963d582b185d53ffedacc1703f60da520fb7 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,37 @@
>+2019-01-15  Antoine Quint  <graouts@apple.com>
>+
>+        Limit user-agent interactions based on the touch-action property
>+        https://bugs.webkit.org/show_bug.cgi?id=193447
>+        <rdar://problem/47283874>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add a new series of tests that check that the "none", "pan-x", "pan-y" and "pinch-zoom" values have the expected
>+        impact on page panning on iOS.
>+
>+        * pointerevents/ios/touch-action-conflicting-values-in-hierarchy-expected.txt: Added.
>+        * pointerevents/ios/touch-action-conflicting-values-in-hierarchy.html: Added.
>+        * pointerevents/ios/touch-action-none-expected.txt: Added.
>+        * pointerevents/ios/touch-action-none-in-iframe-expected.txt: Added.
>+        * pointerevents/ios/touch-action-none-in-iframe.html: Added.
>+        * pointerevents/ios/touch-action-none-in-overflow-scrolling-touch-expected.txt: Added.
>+        * pointerevents/ios/touch-action-none-in-overflow-scrolling-touch.html: Added.
>+        * pointerevents/ios/touch-action-none-on-iframe-expected.txt: Added.
>+        * pointerevents/ios/touch-action-none-on-iframe.html: Added.
>+        * pointerevents/ios/touch-action-none-on-parent-expected.txt: Added.
>+        * pointerevents/ios/touch-action-none-on-parent.html: Added.
>+        * pointerevents/ios/touch-action-none.html: Added.
>+        * pointerevents/ios/touch-action-pan-x-expected.txt: Added.
>+        * pointerevents/ios/touch-action-pan-x-pan-y-expected.txt: Added.
>+        * pointerevents/ios/touch-action-pan-x-pan-y.html: Added.
>+        * pointerevents/ios/touch-action-pan-x.html: Added.
>+        * pointerevents/ios/touch-action-pan-y-expected.txt: Added.
>+        * pointerevents/ios/touch-action-pan-y.html: Added.
>+        * pointerevents/ios/touch-action-pinch-zoom-allows-zooming-expected.txt: Added.
>+        * pointerevents/ios/touch-action-pinch-zoom-allows-zooming.html: Added.
>+        * pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling-expected.txt: Added.
>+        * pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling.html: Added.
>+
> 2019-01-15  Ryosuke Niwa  <rniwa@webkit.org>
> 
>         VisualViewport API should be updated upon opening of keyboard
>diff --git a/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy-expected.txt b/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..510b8f72ea74b38ade2134593d265218d2b9bb0d
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting conflicting touch-action values on the target element and parent prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy.html b/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..75b5076bbebe6b1e134a5a05aa4e8c30d08f4f3b
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-conflicting-values-in-hierarchy.html
>@@ -0,0 +1,31 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+    document.body.style.touchAction = "pan-x";
>+
>+    target.style.touchAction = "pan-y";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting conflicting touch-action values on the target element and parent prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-expected.txt b/LayoutTests/pointerevents/ios/touch-action-none-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..727e8af81bd984c8c34070551af5b61e9270ff81
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: none on an element prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-in-iframe-expected.txt b/LayoutTests/pointerevents/ios/touch-action-none-in-iframe-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..b8584103239f1bc7f7e9feb7537f5c997e99e277
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-in-iframe-expected.txt
>@@ -0,0 +1,4 @@
>+
>+
>+PASS Testing that setting touch-action: none in content hosted in an iframe prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-in-iframe.html b/LayoutTests/pointerevents/ios/touch-action-none-in-iframe.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..728b82b335d3dbc9561451db5008342120aff83c
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-in-iframe.html
>@@ -0,0 +1,48 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+<style>
>+
>+iframe {
>+    position: absolute;
>+    left: 0;
>+    top: 0;
>+    width: 400px;
>+    height: 400px;
>+}
>+
>+</style>
>+</head>
>+<body>
>+<iframe></iframe>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+async_test(test => {
>+    const iframe = document.body.firstElementChild;
>+    const target = iframe.contentDocument.body.appendChild(document.createElement("div"));
>+    target.setAttribute("style", `
>+        position: absolute;
>+        left: 0;
>+        top: 0;
>+        width: 200%;
>+        height: 200%;
>+        touch-action: none;
>+    `);
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: none in content hosted in an iframe prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch-expected.txt b/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..2c0072910245ef57587ebe9c52c9fabc0532d1c2
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: none in content hosted in a scrollable container using '-webkit-overflow-scrolling: touch' prevents scrolling of that container. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch.html b/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..9e9614ffefcefbeafe674174b581541c0f235141
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-in-overflow-scrolling-touch.html
>@@ -0,0 +1,49 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+<style>
>+
>+#scrolling-container {
>+    position: absolute;
>+    left: 0;
>+    top: 0;
>+    width: 400px;
>+    height: 400px;
>+    overflow: scroll;
>+    -webkit-overflow-scrolling: touch;
>+}
>+
>+#scrolling-container > div {
>+    position: absolute;
>+    left: 0;
>+    top: 0;
>+    width: 200%;
>+    height: 200%;
>+    touch-action: none;
>+}
>+
>+</style>
>+</head>
>+<body>
>+<div id="scrolling-container"><div></div></div>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+async_test(test => {
>+    const scrollingContainer = document.body.firstElementChild;
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(scrollingContainer.scrollLeft, 0, "The scrolling container was not scrolled in the x-axis.");
>+        assert_equals(scrollingContainer.scrollTop, 0, "The scrolling container was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: none in content hosted in a scrollable container using '-webkit-overflow-scrolling: touch' prevents scrolling of that container.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-on-iframe-expected.txt b/LayoutTests/pointerevents/ios/touch-action-none-on-iframe-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..46751bdd7c3462a1e086ffc73f353ed44daf7fbc
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-on-iframe-expected.txt
>@@ -0,0 +1,4 @@
>+
>+
>+PASS Testing that setting touch-action: none on an iframe and interacting with its content prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-on-iframe.html b/LayoutTests/pointerevents/ios/touch-action-none-on-iframe.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..d927ea8db46174341c51a0c4cc5253e5b6207a2d
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-on-iframe.html
>@@ -0,0 +1,48 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+<style>
>+
>+iframe {
>+    position: absolute;
>+    left: 0;
>+    top: 0;
>+    width: 400px;
>+    height: 400px;
>+    touch-action: none;
>+}
>+
>+</style>
>+</head>
>+<body>
>+<iframe></iframe>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+async_test(test => {
>+    const iframe = document.body.firstElementChild;
>+    const target = iframe.contentDocument.body.appendChild(document.createElement("div"));
>+    target.setAttribute("style", `
>+        position: absolute;
>+        left: 0;
>+        top: 0;
>+        width: 200%;
>+        height: 200%;
>+    `);
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: none on an iframe and interacting with its content prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-on-parent-expected.txt b/LayoutTests/pointerevents/ios/touch-action-none-on-parent-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..d02b1304968a291eadd13739526fc0d8cbe2a29b
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-on-parent-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: none on a parent element prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none-on-parent.html b/LayoutTests/pointerevents/ios/touch-action-none-on-parent.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..9a480793f790a5c86241769f9931e8f480cf3b74
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none-on-parent.html
>@@ -0,0 +1,29 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+    document.body.style.touchAction = "none";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: none on a parent element prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-none.html b/LayoutTests/pointerevents/ios/touch-action-none.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..ad00b83bb98e4ae5ddc9a59c98672a6a0329ce8b
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-none.html
>@@ -0,0 +1,30 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "none";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: none on an element prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-x-expected.txt b/LayoutTests/pointerevents/ios/touch-action-pan-x-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..87e78379df45a7177476c8be7b5d64040f0aacde
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-x-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: pan-x on an element prevents page scrolling in the y-axis. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y-expected.txt b/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..be97bde327fc29c3ae4b780a111647cd68fd5f82
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting 'touch-action: pan-x pan-y' on an element allows page scrolling in both axes. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y.html b/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..52291a4d8c67c22151c229d837d71a8f3d00ab14
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-x-pan-y.html
>@@ -0,0 +1,30 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "pan-x pan-y";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_not_equals(window.pageXOffset, 0, "The page was scrolled in the x-axis.");
>+        assert_not_equals(window.pageYOffset, 0, "The page was scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting 'touch-action: pan-x pan-y' on an element allows page scrolling in both axes.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-x.html b/LayoutTests/pointerevents/ios/touch-action-pan-x.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..cb9205f7ef5da2cab70019cfb8ea70f95d77c6f7
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-x.html
>@@ -0,0 +1,30 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "pan-x";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_not_equals(window.pageXOffset, 0, "The page was scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: pan-x on an element prevents page scrolling in the y-axis.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-y-expected.txt b/LayoutTests/pointerevents/ios/touch-action-pan-y-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..3ff658c3864226715ae67ea42fbb928680692848
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-y-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: pan-x on an element prevents page scrolling in the x-axis. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pan-y.html b/LayoutTests/pointerevents/ios/touch-action-pan-y.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..9090d39601fbee17bfd1b95f243e9fabc522795e
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pan-y.html
>@@ -0,0 +1,30 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "pan-y";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_not_equals(window.pageYOffset, 0, "The page was scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: pan-x on an element prevents page scrolling in the x-axis.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming-expected.txt b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..094e67615e2a5998f3333f90fda30dd1dca5a468
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: pinch-zoom on an element allows page zooming. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming.html b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..2da63c9429e1aa139026ed4313cea6d5d4787976
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-allows-zooming.html
>@@ -0,0 +1,29 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "400px", height: "400px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "pinch-zoom";
>+
>+    ui.pinchOut({ x: 50, y: 50, width: 100, height: 100, scale: 0.5 }).then(() => {
>+        assert_not_equals(window.internals.pageScaleFactor(), 1, "The page was scaled.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: pinch-zoom on an element allows page zooming.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling-expected.txt b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..60c85b9aa552df9b71d9ae43974050e0c2899800
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling-expected.txt
>@@ -0,0 +1,3 @@
>+
>+PASS Testing that setting touch-action: pinch-zoom on an element prevents page scrolling. 
>+
>diff --git a/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling.html b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..02341c621507a3ee83734d27713d84bff559d7dd
>--- /dev/null
>+++ b/LayoutTests/pointerevents/ios/touch-action-pinch-zoom-prevents-scrolling.html
>@@ -0,0 +1,30 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset=utf-8>
>+<meta name="viewport" content="width=device-width, initial-scale=1">
>+</head>
>+<body>
>+<script src="../../resources/testharness.js"></script>
>+<script src="../../resources/testharnessreport.js"></script>
>+<script src="../utils.js"></script>
>+<script>
>+
>+'use strict';
>+
>+target_test({ width: "200px", height: "200px" }, (target, test) => {
>+    document.body.style.width = "2000px";
>+    document.body.style.height = "2000px";
>+
>+    target.style.touchAction = "pinch-zoom";
>+
>+    ui.swipe({ x: 150, y: 150 }, { x: 50, y: 50 }).then(() => {
>+        assert_equals(window.pageXOffset, 0, "The page was not scrolled in the x-axis.");
>+        assert_equals(window.pageYOffset, 0, "The page was not scrolled in the y-axis.");
>+        test.done();
>+    });
>+}, "Testing that setting touch-action: pinch-zoom on an element prevents page scrolling.");
>+
>+</script>
>+</body>
>+</html>
>\ No newline at end of file

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Attachments on bug 193447: 359189 | 359208 | 359257 | 359258 | 359260 | 359363 | 359365 | 360028 | 360029 | 360031 | 360089 | 360090 | 360100 | 360338