The Tor Browser: layout/xul/nsScrollbarFrame.h@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 //

     7 // nsScrollbarFrame

     8 //

    10 #ifndef nsScrollbarFrame_h__

    11 #define nsScrollbarFrame_h__

    13 #include "mozilla/Attributes.h"

    14 #include "nsBoxFrame.h"

    16 class nsIScrollbarMediator;

    18 nsIFrame* NS_NewScrollbarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    20 class nsScrollbarFrame : public nsBoxFrame

    21 {

    22 public:

    23     nsScrollbarFrame(nsIPresShell* aShell, nsStyleContext* aContext):

    24       nsBoxFrame(aShell, aContext), mScrollbarMediator(nullptr) {}

    26   NS_DECL_QUERYFRAME_TARGET(nsScrollbarFrame)

    28 #ifdef DEBUG_FRAME_DUMP

    29   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE {

    30     return MakeFrameName(NS_LITERAL_STRING("ScrollbarFrame"), aResult);

    31   }

    32 #endif

    34   // nsIFrame overrides

    35   virtual nsresult AttributeChanged(int32_t aNameSpaceID,

    36                                     nsIAtom* aAttribute,

    37                                     int32_t aModType) MOZ_OVERRIDE;

    39   NS_DECL_QUERYFRAME

    40   NS_DECL_FRAMEARENA_HELPERS

    42   NS_IMETHOD HandlePress(nsPresContext* aPresContext,

    43                          mozilla::WidgetGUIEvent* aEvent,

    44                          nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    46   NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,

    47                                  mozilla::WidgetGUIEvent* aEvent,

    48                                  nsEventStatus* aEventStatus,

    49                                  bool aControlHeld) MOZ_OVERRIDE;

    51   NS_IMETHOD HandleDrag(nsPresContext* aPresContext,

    52                         mozilla::WidgetGUIEvent* aEvent,

    53                         nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    55   NS_IMETHOD HandleRelease(nsPresContext* aPresContext,

    56                            mozilla::WidgetGUIEvent* aEvent,

    57                            nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    59   virtual void Init(nsIContent*      aContent,

    60                     nsIFrame*        aParent,

    61                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;

    63   virtual nsresult Reflow(nsPresContext*          aPresContext,

    64                           nsHTMLReflowMetrics&     aDesiredSize,

    65                           const nsHTMLReflowState& aReflowState,

    66                           nsReflowStatus&          aStatus) MOZ_OVERRIDE;

    68   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    70   void SetScrollbarMediatorContent(nsIContent* aMediator);

    71   nsIScrollbarMediator* GetScrollbarMediator();

    73   // nsBox methods

    75   /**

    76    * Treat scrollbars as clipping their children; overflowing children

    77    * will not be allowed to set an overflow rect on this

    78    * frame. This means that when the scroll code decides to hide a

    79    * scrollframe by setting its height or width to zero, that will

    80    * hide the children too.

    81    */

    82   virtual bool DoesClipChildren() MOZ_OVERRIDE { return true; }

    84   virtual nsresult GetMargin(nsMargin& aMargin) MOZ_OVERRIDE;

    86 private:

    87   nsCOMPtr<nsIContent> mScrollbarMediator;

    88 }; // class nsScrollbarFrame

    90 #endif

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