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The Tor Browser
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nsScrollbarButtonFrame.h (2739B)

      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 /**
      8 
      9  Eric D Vaughan
     10  This class lays out its children either vertically or horizontally
     11 
     12 **/
     13 
     14 #ifndef nsScrollbarButtonFrame_h___
     15 #define nsScrollbarButtonFrame_h___
     16 
     17 #include "SimpleXULLeafFrame.h"
     18 #include "mozilla/Attributes.h"
     19 #include "nsLeafFrame.h"
     20 #include "nsRepeatService.h"
     21 
     22 class nsScrollbarFrame;
     23 class nsIScrollbarMediator;
     24 
     25 namespace mozilla {
     26 class PresShell;
     27 }  // namespace mozilla
     28 
     29 class nsScrollbarButtonFrame final : public mozilla::SimpleXULLeafFrame {
     30 public:
     31  NS_DECL_FRAMEARENA_HELPERS(nsScrollbarButtonFrame)
     32 
     33  nsScrollbarButtonFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
     34      : mozilla::SimpleXULLeafFrame(aStyle, aPresContext, kClassID) {}
     35 
     36  // Overrides
     37  void Destroy(DestroyContext&) override;
     38 
     39  friend nsIFrame* NS_NewScrollbarButtonFrame(mozilla::PresShell* aPresShell,
     40                                              ComputedStyle* aStyle);
     41 
     42  nsresult HandleEvent(nsPresContext* aPresContext,
     43                       mozilla::WidgetGUIEvent* aEvent,
     44                       nsEventStatus* aEventStatus) override;
     45 
     46  nsScrollbarFrame* GetScrollbar();
     47  nsIScrollbarMediator* GetMediator();
     48 
     49  bool HandleButtonPress(nsPresContext* aPresContext,
     50                         mozilla::WidgetGUIEvent* aEvent,
     51                         nsEventStatus* aEventStatus);
     52 
     53  NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
     54                                 mozilla::WidgetGUIEvent* aEvent,
     55                                 nsEventStatus* aEventStatus,
     56                                 bool aControlHeld) override {
     57    return NS_OK;
     58  }
     59 
     60  MOZ_CAN_RUN_SCRIPT
     61  NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
     62                        mozilla::WidgetGUIEvent* aEvent,
     63                        nsEventStatus* aEventStatus) override {
     64    return NS_OK;
     65  }
     66 
     67  NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
     68                           mozilla::WidgetGUIEvent* aEvent,
     69                           nsEventStatus* aEventStatus) override;
     70 
     71 protected:
     72  void StartRepeat() {
     73    nsRepeatService::GetInstance()->Start(Notify, this, mContent->OwnerDoc(),
     74                                          "nsScrollbarButtonFrame"_ns);
     75  }
     76  void StopRepeat() { nsRepeatService::GetInstance()->Stop(Notify, this); }
     77  void Notify();
     78  static void Notify(void* aData) {
     79    static_cast<nsScrollbarButtonFrame*>(aData)->Notify();
     80  }
     81 
     82  bool mCursorOnThis = false;
     83 };
     84 
     85 #endif