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 Communicator client 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 : /* rendering object for list-item bullets */
39 :
40 : #ifndef nsBulletFrame_h___
41 : #define nsBulletFrame_h___
42 :
43 : #include "nsFrame.h"
44 : #include "nsStyleContext.h"
45 :
46 : #include "imgIRequest.h"
47 : #include "imgIDecoderObserver.h"
48 : #include "nsStubImageDecoderObserver.h"
49 :
50 : #define BULLET_FRAME_IMAGE_LOADING NS_FRAME_STATE_BIT(63)
51 : #define BULLET_FRAME_HAS_FONT_INFLATION NS_FRAME_STATE_BIT(62)
52 :
53 : class nsBulletFrame;
54 :
55 : class nsBulletListener : public nsStubImageDecoderObserver
56 : {
57 : public:
58 : nsBulletListener();
59 : virtual ~nsBulletListener();
60 :
61 : NS_DECL_ISUPPORTS
62 : // imgIDecoderObserver (override nsStubImageDecoderObserver)
63 : NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
64 : NS_IMETHOD OnDataAvailable(imgIRequest *aRequest, bool aCurrentFrame,
65 : const nsIntRect *aRect);
66 : NS_IMETHOD OnStopDecode(imgIRequest *aRequest, nsresult status,
67 : const PRUnichar *statusArg);
68 : NS_IMETHOD OnImageIsAnimated(imgIRequest *aRequest);
69 :
70 : // imgIContainerObserver (override nsStubImageDecoderObserver)
71 : NS_IMETHOD FrameChanged(imgIRequest *aRequest,
72 : imgIContainer *aContainer,
73 : const nsIntRect *dirtyRect);
74 :
75 0 : void SetFrame(nsBulletFrame *frame) { mFrame = frame; }
76 :
77 : private:
78 : nsBulletFrame *mFrame;
79 : };
80 :
81 : /**
82 : * A simple class that manages the layout and rendering of html bullets.
83 : * This class also supports the CSS list-style properties.
84 : */
85 : class nsBulletFrame : public nsFrame {
86 : public:
87 : NS_DECL_FRAMEARENA_HELPERS
88 :
89 0 : nsBulletFrame(nsStyleContext* aContext)
90 0 : : nsFrame(aContext)
91 : {
92 0 : }
93 : virtual ~nsBulletFrame();
94 :
95 : // nsIFrame
96 : virtual void DestroyFrom(nsIFrame* aDestructRoot);
97 : NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
98 : const nsRect& aDirtyRect,
99 : const nsDisplayListSet& aLists);
100 : virtual nsIAtom* GetType() const;
101 : virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
102 : #ifdef NS_DEBUG
103 : NS_IMETHOD GetFrameName(nsAString& aResult) const;
104 : #endif
105 :
106 : // nsIHTMLReflow
107 : NS_IMETHOD Reflow(nsPresContext* aPresContext,
108 : nsHTMLReflowMetrics& aMetrics,
109 : const nsHTMLReflowState& aReflowState,
110 : nsReflowStatus& aStatus);
111 : virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
112 : virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
113 :
114 : // nsBulletFrame
115 : PRInt32 SetListItemOrdinal(PRInt32 aNextOrdinal, bool* aChanged);
116 :
117 :
118 : NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
119 : NS_IMETHOD OnDataAvailable(imgIRequest *aRequest,
120 : bool aCurrentFrame,
121 : const nsIntRect *aRect);
122 : NS_IMETHOD OnStopDecode(imgIRequest *aRequest,
123 : nsresult aStatus,
124 : const PRUnichar *aStatusArg);
125 : NS_IMETHOD OnImageIsAnimated(imgIRequest *aRequest);
126 : NS_IMETHOD FrameChanged(imgIRequest *aRequest,
127 : imgIContainer *aContainer,
128 : const nsIntRect *aDirtyRect);
129 :
130 : /* get list item text, without '.' */
131 : static bool AppendCounterText(PRInt32 aListStyleType,
132 : PRInt32 aOrdinal,
133 : nsString& aResult);
134 :
135 : /* get list item text, with '.' */
136 : bool GetListItemText(const nsStyleList& aStyleList,
137 : nsString& aResult);
138 :
139 : void PaintBullet(nsRenderingContext& aRenderingContext, nsPoint aPt,
140 : const nsRect& aDirtyRect);
141 :
142 : virtual bool IsEmpty();
143 : virtual bool IsSelfEmpty();
144 : virtual nscoord GetBaseline() const;
145 :
146 : float GetFontSizeInflation() const;
147 0 : bool HasFontSizeInflation() const {
148 0 : return (GetStateBits() & BULLET_FRAME_HAS_FONT_INFLATION) != 0;
149 : }
150 : void SetFontSizeInflation(float aInflation);
151 :
152 : protected:
153 : void GetDesiredSize(nsPresContext* aPresContext,
154 : nsRenderingContext *aRenderingContext,
155 : nsHTMLReflowMetrics& aMetrics,
156 : float aFontSizeInflation);
157 :
158 : void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
159 :
160 : nsMargin mPadding;
161 : nsCOMPtr<imgIRequest> mImageRequest;
162 : nsRefPtr<nsBulletListener> mListener;
163 :
164 : nsSize mIntrinsicSize;
165 : nsSize mComputedSize;
166 : PRInt32 mOrdinal;
167 : bool mTextIsRTL;
168 :
169 : private:
170 :
171 : // This is a boolean flag indicating whether or not the current image request
172 : // has been registered with the refresh driver.
173 : bool mRequestRegistered;
174 : };
175 :
176 : #endif /* nsBulletFrame_h___ */
|