PositionedEventTargeting.h (1263B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef mozilla_PositionedEventTargeting_h 8 #define mozilla_PositionedEventTargeting_h 9 10 #include <stdint.h> 11 12 #include "RelativeTo.h" 13 #include "mozilla/EventForwards.h" 14 15 class nsIFrame; 16 struct nsPoint; 17 18 namespace mozilla { 19 20 enum { INPUT_IGNORE_ROOT_SCROLL_FRAME = 0x01 }; 21 /** 22 * Finds the target frame for a pointer event given the event type and location. 23 * This can look for frames within a rectangle surrounding the actual location 24 * that are suitable targets, to account for inaccurate pointing devices. 25 */ 26 nsIFrame* FindFrameTargetedByInputEvent( 27 WidgetGUIEvent* aEvent, RelativeTo aRootFrame, 28 const nsPoint& aPointRelativeToRootFrame, uint32_t aFlags = 0); 29 30 class MOZ_RAII EventRetargetSuppression { 31 public: 32 EventRetargetSuppression(); 33 ~EventRetargetSuppression(); 34 static bool IsActive(); 35 36 private: 37 static uint32_t sSuppressionCount; 38 }; 39 40 } // namespace mozilla 41 42 #endif /* mozilla_PositionedEventTargeting_h */