michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //
michael@0: // nsScrollbarFrame
michael@0: //
michael@0: 
michael@0: #ifndef nsScrollbarFrame_h__
michael@0: #define nsScrollbarFrame_h__
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsBoxFrame.h"
michael@0: 
michael@0: class nsIScrollbarMediator;
michael@0: 
michael@0: nsIFrame* NS_NewScrollbarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0: 
michael@0: class nsScrollbarFrame : public nsBoxFrame
michael@0: {
michael@0: public:
michael@0:     nsScrollbarFrame(nsIPresShell* aShell, nsStyleContext* aContext):
michael@0:       nsBoxFrame(aShell, aContext), mScrollbarMediator(nullptr) {}
michael@0: 
michael@0:   NS_DECL_QUERYFRAME_TARGET(nsScrollbarFrame)
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0:   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE {
michael@0:     return MakeFrameName(NS_LITERAL_STRING("ScrollbarFrame"), aResult);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   // nsIFrame overrides
michael@0:   virtual nsresult AttributeChanged(int32_t aNameSpaceID,
michael@0:                                     nsIAtom* aAttribute,
michael@0:                                     int32_t aModType) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_DECL_QUERYFRAME
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0:   NS_IMETHOD HandlePress(nsPresContext* aPresContext,
michael@0:                          mozilla::WidgetGUIEvent* aEvent,
michael@0:                          nsEventStatus* aEventStatus) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
michael@0:                                  mozilla::WidgetGUIEvent* aEvent,
michael@0:                                  nsEventStatus* aEventStatus,
michael@0:                                  bool aControlHeld) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
michael@0:                         mozilla::WidgetGUIEvent* aEvent,
michael@0:                         nsEventStatus* aEventStatus) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
michael@0:                            mozilla::WidgetGUIEvent* aEvent,
michael@0:                            nsEventStatus* aEventStatus) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual void Init(nsIContent*      aContent,
michael@0:                     nsIFrame*        aParent,
michael@0:                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult Reflow(nsPresContext*          aPresContext,
michael@0:                           nsHTMLReflowMetrics&     aDesiredSize,
michael@0:                           const nsHTMLReflowState& aReflowState,
michael@0:                           nsReflowStatus&          aStatus) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsIAtom* GetType() const MOZ_OVERRIDE;  
michael@0: 
michael@0:   void SetScrollbarMediatorContent(nsIContent* aMediator);
michael@0:   nsIScrollbarMediator* GetScrollbarMediator();
michael@0: 
michael@0:   // nsBox methods
michael@0: 
michael@0:   /**
michael@0:    * Treat scrollbars as clipping their children; overflowing children
michael@0:    * will not be allowed to set an overflow rect on this
michael@0:    * frame. This means that when the scroll code decides to hide a
michael@0:    * scrollframe by setting its height or width to zero, that will
michael@0:    * hide the children too.
michael@0:    */
michael@0:   virtual bool DoesClipChildren() MOZ_OVERRIDE { return true; }
michael@0: 
michael@0:   virtual nsresult GetMargin(nsMargin& aMargin) MOZ_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:   nsCOMPtr<nsIContent> mScrollbarMediator;
michael@0: }; // class nsScrollbarFrame
michael@0: 
michael@0: #endif