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-rw-r--r--layout/base/TouchManager.h84
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+/* -*- 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/.
+ */
+
+/* Description of TouchManager class.
+ * Incapsulate code related with work of touch events.
+ */
+
+#ifndef TouchManager_h_
+#define TouchManager_h_
+
+#include "mozilla/BasicEvents.h"
+#include "mozilla/dom/Touch.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/TouchEvents.h"
+#include "nsRefPtrHashtable.h"
+
+namespace mozilla {
+class PresShell;
+
+class TouchManager {
+ public:
+ // Initialize and release static variables
+ static void InitializeStatics();
+ static void ReleaseStatics();
+
+ void Init(PresShell* aPresShell, dom::Document* aDocument);
+ void Destroy();
+
+ // Perform hit test and setup the event targets for touchstart. Other touch
+ // events are dispatched to the same target as touchstart.
+ static nsIFrame* SetupTarget(WidgetTouchEvent* aEvent, nsIFrame* aFrame);
+
+ /**
+ * This function checks whether all touch points hit elements in the same
+ * document. If not, we try to find its cross document parent which is in the
+ * same document of the existing target as the event target. We mark the
+ * touch point as suppressed if can't find it. The suppressed touch points are
+ * removed in TouchManager::PreHandleEvent so that we don't dispatch them to
+ * content.
+ *
+ * @param aEvent A touch event to be checked.
+ *
+ * @return The targeted frame of aEvent.
+ */
+ static nsIFrame* SuppressInvalidPointsAndGetTargetedFrame(
+ WidgetTouchEvent* aEvent);
+
+ bool PreHandleEvent(mozilla::WidgetEvent* aEvent, nsEventStatus* aStatus,
+ bool& aTouchIsNew,
+ nsCOMPtr<nsIContent>& aCurrentEventContent);
+
+ static already_AddRefed<nsIContent> GetAnyCapturedTouchTarget();
+ static bool HasCapturedTouch(int32_t aId);
+ static already_AddRefed<dom::Touch> GetCapturedTouch(int32_t aId);
+ static bool ShouldConvertTouchToPointer(const dom::Touch* aTouch,
+ const WidgetTouchEvent* aEvent);
+
+ private:
+ void EvictTouches(dom::Document* aLimitToDocument = nullptr);
+ static void EvictTouchPoint(RefPtr<dom::Touch>& aTouch,
+ dom::Document* aLimitToDocument);
+ static void AppendToTouchList(WidgetTouchEvent::TouchArrayBase* aTouchList);
+
+ RefPtr<PresShell> mPresShell;
+ RefPtr<dom::Document> mDocument;
+
+ struct TouchInfo {
+ RefPtr<mozilla::dom::Touch> mTouch;
+ nsCOMPtr<nsIContent> mNonAnonymousTarget;
+ bool mConvertToPointer;
+ };
+
+ static StaticAutoPtr<nsTHashMap<nsUint32HashKey, TouchInfo>>
+ sCaptureTouchList;
+ static layers::LayersId sCaptureTouchLayersId;
+};
+
+} // namespace mozilla
+
+#endif /* !defined(TouchManager_h_) */