1 files changed, 82 insertions, 0 deletions
diff --git a/layout/base/TouchManager.h b/layout/base/TouchManager.h
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+++ b/layout/base/TouchManager.h
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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/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 nsDataHashtable<nsUint32HashKey, TouchInfo>* sCaptureTouchList;
+  static layers::LayersId sCaptureTouchLayersId;
+};
+
+}  // namespace mozilla
+
+#endif /* !defined(TouchManager_h_) */