1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : //
39 : // nsScrollbarFrame
40 : //
41 :
42 : #ifndef nsScrollbarFrame_h__
43 : #define nsScrollbarFrame_h__
44 :
45 : #include "nsBoxFrame.h"
46 :
47 : class nsIScrollbarMediator;
48 :
49 : nsIFrame* NS_NewScrollbarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
50 :
51 : class nsScrollbarFrame : public nsBoxFrame
52 0 : {
53 : public:
54 0 : nsScrollbarFrame(nsIPresShell* aShell, nsStyleContext* aContext):
55 0 : nsBoxFrame(aShell, aContext), mScrollbarMediator(nsnull) {}
56 :
57 : NS_DECL_QUERYFRAME_TARGET(nsScrollbarFrame)
58 :
59 : #ifdef DEBUG
60 0 : NS_IMETHOD GetFrameName(nsAString& aResult) const {
61 0 : return MakeFrameName(NS_LITERAL_STRING("ScrollbarFrame"), aResult);
62 : }
63 : #endif
64 :
65 : // nsIFrame overrides
66 : NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
67 : nsIAtom* aAttribute,
68 : PRInt32 aModType);
69 :
70 : NS_DECL_QUERYFRAME
71 : NS_DECL_FRAMEARENA_HELPERS
72 :
73 : NS_IMETHOD HandlePress(nsPresContext* aPresContext,
74 : nsGUIEvent * aEvent,
75 : nsEventStatus* aEventStatus);
76 :
77 : NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
78 : nsGUIEvent * aEvent,
79 : nsEventStatus* aEventStatus,
80 : bool aControlHeld);
81 :
82 : NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
83 : nsGUIEvent * aEvent,
84 : nsEventStatus* aEventStatus);
85 :
86 : NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
87 : nsGUIEvent * aEvent,
88 : nsEventStatus* aEventStatus);
89 :
90 : NS_IMETHOD Init(nsIContent* aContent,
91 : nsIFrame* aParent,
92 : nsIFrame* aPrevInFlow);
93 :
94 : NS_IMETHOD Reflow(nsPresContext* aPresContext,
95 : nsHTMLReflowMetrics& aDesiredSize,
96 : const nsHTMLReflowState& aReflowState,
97 : nsReflowStatus& aStatus);
98 :
99 : virtual nsIAtom* GetType() const;
100 :
101 : void SetScrollbarMediatorContent(nsIContent* aMediator);
102 : nsIScrollbarMediator* GetScrollbarMediator();
103 :
104 : // nsBox methods
105 :
106 : /**
107 : * Treat scrollbars as clipping their children; overflowing children
108 : * will not be allowed to set an overflow rect on this
109 : * frame. This means that when the scroll code decides to hide a
110 : * scrollframe by setting its height or width to zero, that will
111 : * hide the children too.
112 : */
113 0 : virtual bool DoesClipChildren() { return true; }
114 :
115 : private:
116 : nsCOMPtr<nsIContent> mScrollbarMediator;
117 : }; // class nsScrollbarFrame
118 :
119 : #endif
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