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 : * Author: Aaron Leventhal (aaronl@netscape.com)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
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37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #ifndef _nsHTMLImageAccessible_H_
40 : #define _nsHTMLImageAccessible_H_
41 :
42 : #include "nsBaseWidgetAccessible.h"
43 : #include "nsIAccessibleImage.h"
44 :
45 : /* Accessible for supporting images
46 : * supports:
47 : * - gets name, role
48 : * - support basic state
49 : */
50 : class nsHTMLImageAccessible : public nsLinkableAccessible,
51 : public nsIAccessibleImage
52 0 : {
53 : public:
54 : nsHTMLImageAccessible(nsIContent* aContent, nsDocAccessible* aDoc);
55 :
56 : // nsISupports
57 : NS_DECL_ISUPPORTS_INHERITED
58 :
59 : // nsIAccessible
60 : NS_IMETHOD GetActionName(PRUint8 aIndex, nsAString& aName);
61 : NS_IMETHOD DoAction(PRUint8 index);
62 :
63 : // nsIAccessibleImage
64 : NS_DECL_NSIACCESSIBLEIMAGE
65 :
66 : // nsAccessible
67 : virtual nsresult GetNameInternal(nsAString& aName);
68 : virtual mozilla::a11y::role NativeRole();
69 : virtual PRUint64 NativeState();
70 : virtual nsresult GetAttributesInternal(nsIPersistentProperties *aAttributes);
71 :
72 : // ActionAccessible
73 : virtual PRUint8 ActionCount();
74 :
75 : private:
76 : /**
77 : * Determine if this image accessible has a longdesc attribute.
78 : *
79 : * @returns true if the longdesc attribute is present.
80 : */
81 : bool HasLongDesc();
82 :
83 : /**
84 : * Used by GetActionName and DoAction to ensure the index for opening the
85 : * longdesc URL is valid.
86 : * It is always assumed that the highest possible index opens the longdesc.
87 : *
88 : * @param aIndex The 0-based index to be tested.
89 : *
90 : * @returns true if index is valid for longdesc action.
91 : */
92 : bool IsValidLongDescIndex(PRUint8 aIndex);
93 : };
94 :
95 : ////////////////////////////////////////////////////////////////////////////////
96 : // nsAccessible downcasting method
97 : inline nsHTMLImageAccessible*
98 0 : nsAccessible::AsImage()
99 : {
100 0 : return IsImageAccessible() ?
101 0 : static_cast<nsHTMLImageAccessible*>(this) : nsnull;
102 : }
103 :
104 : #endif
105 :
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