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
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : /*
39 : * rendering object that is the root of the frame tree, which contains
40 : * the document's scrollbars and contains fixed-positioned elements
41 : */
42 :
43 : #ifndef nsViewportFrame_h___
44 : #define nsViewportFrame_h___
45 :
46 : #include "nsContainerFrame.h"
47 : #include "nsGkAtoms.h"
48 :
49 : class nsPresContext;
50 :
51 : /**
52 : * ViewportFrame is the parent of a single child - the doc root frame or a scroll frame
53 : * containing the doc root frame. ViewportFrame stores this child in its primary child
54 : * list.
55 : */
56 : class ViewportFrame : public nsContainerFrame {
57 : public:
58 : NS_DECL_FRAMEARENA_HELPERS
59 :
60 : typedef nsContainerFrame Super;
61 :
62 0 : ViewportFrame(nsStyleContext* aContext)
63 0 : : nsContainerFrame(aContext)
64 0 : {}
65 0 : virtual ~ViewportFrame() { } // useful for debugging
66 :
67 : virtual void DestroyFrom(nsIFrame* aDestructRoot);
68 :
69 : NS_IMETHOD Init(nsIContent* aContent,
70 : nsIFrame* aParent,
71 : nsIFrame* asPrevInFlow);
72 :
73 : NS_IMETHOD SetInitialChildList(ChildListID aListID,
74 : nsFrameList& aChildList);
75 :
76 : NS_IMETHOD AppendFrames(ChildListID aListID,
77 : nsFrameList& aFrameList);
78 :
79 : NS_IMETHOD InsertFrames(ChildListID aListID,
80 : nsIFrame* aPrevFrame,
81 : nsFrameList& aFrameList);
82 :
83 : NS_IMETHOD RemoveFrame(ChildListID aListID,
84 : nsIFrame* aOldFrame);
85 :
86 : NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
87 : const nsRect& aDirtyRect,
88 : const nsDisplayListSet& aLists);
89 :
90 : virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
91 : virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
92 : NS_IMETHOD Reflow(nsPresContext* aPresContext,
93 : nsHTMLReflowMetrics& aDesiredSize,
94 : const nsHTMLReflowState& aReflowState,
95 : nsReflowStatus& aStatus);
96 :
97 : /**
98 : * Get the "type" of the frame
99 : *
100 : * @see nsGkAtoms::viewportFrame
101 : */
102 : virtual nsIAtom* GetType() const;
103 :
104 : virtual void InvalidateInternal(const nsRect& aDamageRect,
105 : nscoord aX, nscoord aY, nsIFrame* aForChild,
106 : PRUint32 aFlags);
107 :
108 : #ifdef DEBUG
109 : NS_IMETHOD GetFrameName(nsAString& aResult) const;
110 : #endif
111 :
112 : private:
113 0 : virtual mozilla::layout::FrameChildListID GetAbsoluteListID() const { return kFixedList; }
114 :
115 : protected:
116 : nsPoint AdjustReflowStateForScrollbars(nsHTMLReflowState* aReflowState) const;
117 : };
118 :
119 :
120 : #endif // nsViewportFrame_h___
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