Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 338 insertions, 0 deletions

diff --git a/dom/events/TouchEvent.cpp b/dom/events/TouchEvent.cpp
new file mode 100644
index 0000000000..24068703be
--- /dev/null
+++ b/dom/events/TouchEvent.cpp
@@ -0,0 +1,338 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/Navigator.h"
+#include "mozilla/dom/TouchEvent.h"
+#include "mozilla/dom/Touch.h"
+#include "mozilla/dom/TouchListBinding.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/TouchEvents.h"
+#include "nsContentUtils.h"
+#include "nsIDocShell.h"
+#include "nsExceptionHandler.h"
+
+namespace mozilla::dom {
+
+/******************************************************************************
+ * TouchList
+ *****************************************************************************/
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TouchList)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TouchList, mParent, mPoints)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(TouchList)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(TouchList)
+
+JSObject* TouchList::WrapObject(JSContext* aCx,
+                                JS::Handle<JSObject*> aGivenProto) {
+  return TouchList_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+// static
+bool TouchList::PrefEnabled(JSContext* aCx, JSObject* aGlobal) {
+  return TouchEvent::PrefEnabled(aCx, aGlobal);
+}
+
+/******************************************************************************
+ * TouchEvent
+ *****************************************************************************/
+
+TouchEvent::TouchEvent(EventTarget* aOwner, nsPresContext* aPresContext,
+                       WidgetTouchEvent* aEvent)
+    : UIEvent(
+          aOwner, aPresContext,
+          aEvent ? aEvent : new WidgetTouchEvent(false, eVoidEvent, nullptr)) {
+  if (aEvent) {
+    mEventIsInternal = false;
+
+    for (uint32_t i = 0; i < aEvent->mTouches.Length(); ++i) {
+      Touch* touch = aEvent->mTouches[i];
+      touch->InitializePoints(mPresContext, aEvent);
+    }
+  } else {
+    mEventIsInternal = true;
+  }
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(TouchEvent, UIEvent,
+                                   mEvent->AsTouchEvent()->mTouches, mTouches,
+                                   mTargetTouches, mChangedTouches)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TouchEvent)
+NS_INTERFACE_MAP_END_INHERITING(UIEvent)
+
+NS_IMPL_ADDREF_INHERITED(TouchEvent, UIEvent)
+NS_IMPL_RELEASE_INHERITED(TouchEvent, UIEvent)
+
+void TouchEvent::InitTouchEvent(const nsAString& aType, bool aCanBubble,
+                                bool aCancelable, nsGlobalWindowInner* aView,
+                                int32_t aDetail, bool aCtrlKey, bool aAltKey,
+                                bool aShiftKey, bool aMetaKey,
+                                TouchList* aTouches, TouchList* aTargetTouches,
+                                TouchList* aChangedTouches) {
+  NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
+
+  UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
+  mEvent->AsInputEvent()->InitBasicModifiers(aCtrlKey, aAltKey, aShiftKey,
+                                             aMetaKey);
+
+  mEvent->AsTouchEvent()->mTouches.Clear();
+
+  // To support touch.target retargeting also when the event is
+  // created by JS, we need to copy Touch objects to the widget event.
+  // In order to not affect targetTouches, we don't check duplicates in that
+  // list.
+  mTargetTouches = aTargetTouches;
+  AssignTouchesToWidgetEvent(mTargetTouches, false);
+  mTouches = aTouches;
+  AssignTouchesToWidgetEvent(mTouches, true);
+  mChangedTouches = aChangedTouches;
+  AssignTouchesToWidgetEvent(mChangedTouches, true);
+}
+
+void TouchEvent::AssignTouchesToWidgetEvent(TouchList* aList,
+                                            bool aCheckDuplicates) {
+  if (!aList) {
+    return;
+  }
+  WidgetTouchEvent* widgetTouchEvent = mEvent->AsTouchEvent();
+  for (uint32_t i = 0; i < aList->Length(); ++i) {
+    Touch* touch = aList->Item(i);
+    if (touch &&
+        (!aCheckDuplicates || !widgetTouchEvent->mTouches.Contains(touch))) {
+      widgetTouchEvent->mTouches.AppendElement(touch);
+    }
+  }
+}
+
+TouchList* TouchEvent::Touches() {
+  if (!mTouches) {
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    if (mEvent->mMessage == eTouchEnd || mEvent->mMessage == eTouchCancel) {
+      // for touchend events, remove any changed touches from mTouches
+      WidgetTouchEvent::AutoTouchArray unchangedTouches;
+      const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+      for (uint32_t i = 0; i < touches.Length(); ++i) {
+        if (!touches[i]->mChanged) {
+          unchangedTouches.AppendElement(touches[i]);
+        }
+      }
+      mTouches = new TouchList(ToSupports(this), unchangedTouches);
+    } else {
+      mTouches = new TouchList(ToSupports(this), touchEvent->mTouches);
+    }
+  }
+  return mTouches;
+}
+
+TouchList* TouchEvent::TargetTouches() {
+  if (!mTargetTouches || !mTargetTouches->Length()) {
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    if (!mTargetTouches) {
+      mTargetTouches = new TouchList(ToSupports(this));
+    }
+    const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+    for (uint32_t i = 0; i < touches.Length(); ++i) {
+      // for touchend/cancel events, don't append to the target list if this is
+      // a touch that is ending
+      if ((mEvent->mMessage != eTouchEnd && mEvent->mMessage != eTouchCancel) ||
+          !touches[i]->mChanged) {
+        bool equalTarget = touches[i]->mTarget == mEvent->mTarget;
+        if (!equalTarget) {
+          // Need to still check if we're inside native anonymous content
+          // and the non-NAC target would be the same.
+          nsIContent* touchTarget =
+              nsIContent::FromEventTargetOrNull(touches[i]->mTarget);
+          nsIContent* eventTarget =
+              nsIContent::FromEventTargetOrNull(mEvent->mTarget);
+          equalTarget = touchTarget && eventTarget &&
+                        touchTarget->FindFirstNonChromeOnlyAccessContent() ==
+                            eventTarget->FindFirstNonChromeOnlyAccessContent();
+        }
+        if (equalTarget) {
+          mTargetTouches->Append(touches[i]);
+        }
+      }
+    }
+  }
+  return mTargetTouches;
+}
+
+TouchList* TouchEvent::ChangedTouches() {
+  if (!mChangedTouches) {
+    WidgetTouchEvent::AutoTouchArray changedTouches;
+    WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
+    const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
+    for (uint32_t i = 0; i < touches.Length(); ++i) {
+      if (touches[i]->mChanged) {
+        changedTouches.AppendElement(touches[i]);
+      }
+    }
+    mChangedTouches = new TouchList(ToSupports(this), changedTouches);
+  }
+  return mChangedTouches;
+}
+
+// static
+bool TouchEvent::PrefEnabled(JSContext* aCx, JSObject* aGlobal) {
+  nsIDocShell* docShell = nullptr;
+  if (aGlobal) {
+    nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobal);
+    if (win) {
+      docShell = win->GetDocShell();
+    }
+  }
+  return PrefEnabled(docShell);
+}
+
+static bool PlatformSupportsTouch() {
+  // Touch events are only actually supported if APZ is enabled. If APZ is
+  // disabled globally, we can check that once and incorporate that into the
+  // cached state. If APZ is enabled, we need to further check based on the
+  // widget, which we do in PrefEnabled (and don't cache that result).
+  static bool sIsTouchDeviceSupportPresent =
+      !!LookAndFeel::GetInt(LookAndFeel::IntID::TouchDeviceSupportPresent) &&
+      gfxPlatform::AsyncPanZoomEnabled();
+
+  return sIsTouchDeviceSupportPresent;
+}
+
+// static
+bool TouchEvent::PrefEnabled(nsIDocShell* aDocShell) {
+  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
+
+  auto touchEventsOverride = mozilla::dom::TouchEventsOverride::None;
+  if (aDocShell) {
+    if (BrowsingContext* bc = aDocShell->GetBrowsingContext()) {
+      touchEventsOverride = bc->TouchEventsOverride();
+    }
+  }
+
+  bool enabled = false;
+  if (touchEventsOverride == mozilla::dom::TouchEventsOverride::Enabled) {
+    enabled = true;
+  } else if (touchEventsOverride ==
+             mozilla::dom::TouchEventsOverride::Disabled) {
+    enabled = false;
+  } else {
+    const int32_t prefValue = StaticPrefs::dom_w3c_touch_events_enabled();
+    if (prefValue == 2) {
+      enabled = PlatformSupportsTouch();
+
+      static bool firstTime = true;
+      // The touch screen data seems to be inaccurate in the parent process,
+      // and we really need the crash annotation in child processes.
+      if (firstTime && !XRE_IsParentProcess()) {
+        CrashReporter::AnnotateCrashReport(
+            CrashReporter::Annotation::HasDeviceTouchScreen, enabled);
+        firstTime = false;
+      }
+
+#if defined(XP_WIN) || defined(MOZ_WIDGET_GTK)
+      if (enabled && aDocShell) {
+        // APZ might be disabled on this particular widget, in which case
+        // TouchEvent support will also be disabled. Try to detect that.
+        RefPtr<nsPresContext> pc = aDocShell->GetPresContext();
+        if (pc) {
+          nsCOMPtr<nsIWidget> widget = pc->GetRootWidget();
+          if (widget) {
+            enabled &= widget->AsyncPanZoomEnabled();
+          }
+        }
+      }
+#endif
+    } else {
+      enabled = !!prefValue;
+    }
+  }
+
+  if (enabled) {
+    nsContentUtils::InitializeTouchEventTable();
+  }
+  return enabled;
+}
+
+// static
+bool TouchEvent::LegacyAPIEnabled(JSContext* aCx, JSObject* aGlobal) {
+  nsIPrincipal* principal = nsContentUtils::SubjectPrincipal(aCx);
+  bool isSystem = principal && principal->IsSystemPrincipal();
+
+  nsIDocShell* docShell = nullptr;
+  if (aGlobal) {
+    nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobal);
+    if (win) {
+      docShell = win->GetDocShell();
+    }
+  }
+  return LegacyAPIEnabled(docShell, isSystem);
+}
+
+// static
+bool TouchEvent::LegacyAPIEnabled(nsIDocShell* aDocShell,
+                                  bool aCallerIsSystem) {
+  return (aCallerIsSystem ||
+          StaticPrefs::dom_w3c_touch_events_legacy_apis_enabled() ||
+          (aDocShell && aDocShell->GetBrowsingContext() &&
+           aDocShell->GetBrowsingContext()->TouchEventsOverride() ==
+               mozilla::dom::TouchEventsOverride::Enabled)) &&
+         PrefEnabled(aDocShell);
+}
+
+// static
+already_AddRefed<TouchEvent> TouchEvent::Constructor(
+    const GlobalObject& aGlobal, const nsAString& aType,
+    const TouchEventInit& aParam) {
+  nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
+  RefPtr<TouchEvent> e = new TouchEvent(t, nullptr, nullptr);
+  bool trusted = e->Init(t);
+  RefPtr<TouchList> touches = e->CopyTouches(aParam.mTouches);
+  RefPtr<TouchList> targetTouches = e->CopyTouches(aParam.mTargetTouches);
+  RefPtr<TouchList> changedTouches = e->CopyTouches(aParam.mChangedTouches);
+  e->InitTouchEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
+                    aParam.mDetail, aParam.mCtrlKey, aParam.mAltKey,
+                    aParam.mShiftKey, aParam.mMetaKey, touches, targetTouches,
+                    changedTouches);
+  e->SetTrusted(trusted);
+  e->SetComposed(aParam.mComposed);
+  return e.forget();
+}
+
+already_AddRefed<TouchList> TouchEvent::CopyTouches(
+    const Sequence<OwningNonNull<Touch>>& aTouches) {
+  RefPtr<TouchList> list = new TouchList(GetParentObject());
+  size_t len = aTouches.Length();
+  for (size_t i = 0; i < len; ++i) {
+    list->Append(aTouches[i]);
+  }
+  return list.forget();
+}
+
+bool TouchEvent::AltKey() { return mEvent->AsTouchEvent()->IsAlt(); }
+
+bool TouchEvent::MetaKey() { return mEvent->AsTouchEvent()->IsMeta(); }
+
+bool TouchEvent::CtrlKey() { return mEvent->AsTouchEvent()->IsControl(); }
+
+bool TouchEvent::ShiftKey() { return mEvent->AsTouchEvent()->IsShift(); }
+
+}  // namespace mozilla::dom
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+already_AddRefed<TouchEvent> NS_NewDOMTouchEvent(EventTarget* aOwner,
+                                                 nsPresContext* aPresContext,
+                                                 WidgetTouchEvent* aEvent) {
+  RefPtr<TouchEvent> it = new TouchEvent(aOwner, aPresContext, aEvent);
+  return it.forget();
+}