1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "HTMLImageMapAccessible.h"
#include "ARIAMap.h"
#include "nsAccUtils.h"
#include "DocAccessible-inl.h"
#include "Role.h"
#include "nsIFrame.h"
#include "nsImageFrame.h"
#include "nsImageMap.h"
#include "nsIURI.h"
#include "mozilla/dom/HTMLAreaElement.h"
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLImageMapAccessible::HTMLImageMapAccessible(nsIContent* aContent,
DocAccessible* aDoc)
: ImageAccessibleWrap(aContent, aDoc) {
mType = eImageMapType;
UpdateChildAreas(false);
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: Accessible public
role HTMLImageMapAccessible::NativeRole() const { return roles::IMAGE_MAP; }
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: HyperLinkAccessible
uint32_t HTMLImageMapAccessible::AnchorCount() { return ChildCount(); }
Accessible* HTMLImageMapAccessible::AnchorAt(uint32_t aAnchorIndex) {
return GetChildAt(aAnchorIndex);
}
already_AddRefed<nsIURI> HTMLImageMapAccessible::AnchorURIAt(
uint32_t aAnchorIndex) const {
Accessible* area = GetChildAt(aAnchorIndex);
if (!area) return nullptr;
nsIContent* linkContent = area->GetContent();
return linkContent ? linkContent->GetHrefURI() : nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: public
void HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents) {
nsImageFrame* imageFrame = do_QueryFrame(mContent->GetPrimaryFrame());
// If image map is not initialized yet then we trigger one time more later.
nsImageMap* imageMapObj = imageFrame->GetExistingImageMap();
if (!imageMapObj) return;
TreeMutation mt(this, TreeMutation::kNoEvents & !aDoFireEvents);
// Remove areas that are not a valid part of the image map anymore.
for (int32_t childIdx = mChildren.Length() - 1; childIdx >= 0; childIdx--) {
Accessible* area = mChildren.ElementAt(childIdx);
if (area->GetContent()->GetPrimaryFrame()) continue;
mt.BeforeRemoval(area);
RemoveChild(area);
}
// Insert new areas into the tree.
uint32_t areaElmCount = imageMapObj->AreaCount();
for (uint32_t idx = 0; idx < areaElmCount; idx++) {
nsIContent* areaContent = imageMapObj->GetAreaAt(idx);
Accessible* area = mChildren.SafeElementAt(idx);
if (!area || area->GetContent() != areaContent) {
RefPtr<Accessible> area = new HTMLAreaAccessible(areaContent, mDoc);
mDoc->BindToDocument(area, aria::GetRoleMap(areaContent->AsElement()));
if (!InsertChildAt(idx, area)) {
mDoc->UnbindFromDocument(area);
break;
}
mt.AfterInsertion(area);
}
}
mt.Done();
}
Accessible* HTMLImageMapAccessible::GetChildAccessibleFor(
const nsINode* aNode) const {
uint32_t length = mChildren.Length();
for (uint32_t i = 0; i < length; i++) {
Accessible* area = mChildren[i];
if (area->GetContent() == aNode) return area;
}
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible
////////////////////////////////////////////////////////////////////////////////
HTMLAreaAccessible::HTMLAreaAccessible(nsIContent* aContent,
DocAccessible* aDoc)
: HTMLLinkAccessible(aContent, aDoc) {
// Make HTML area DOM element not accessible. HTML image map accessible
// manages its tree itself.
mStateFlags |= eNotNodeMapEntry;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible: Accessible
ENameValueFlag HTMLAreaAccessible::NativeName(nsString& aName) const {
ENameValueFlag nameFlag = Accessible::NativeName(aName);
if (!aName.IsEmpty()) return nameFlag;
if (!mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName))
Value(aName);
return eNameOK;
}
void HTMLAreaAccessible::Description(nsString& aDescription) {
aDescription.Truncate();
// Still to do - follow IE's standard here
RefPtr<dom::HTMLAreaElement> area =
dom::HTMLAreaElement::FromNodeOrNull(mContent);
if (area) area->GetShape(aDescription);
}
////////////////////////////////////////////////////////////////////////////////
// HTMLAreaAccessible: Accessible public
Accessible* HTMLAreaAccessible::ChildAtPoint(int32_t aX, int32_t aY,
EWhichChildAtPoint aWhichChild) {
// Don't walk into area accessibles.
return this;
}
////////////////////////////////////////////////////////////////////////////////
// HTMLImageMapAccessible: HyperLinkAccessible
uint32_t HTMLAreaAccessible::StartOffset() {
// Image map accessible is not hypertext accessible therefore
// StartOffset/EndOffset implementations of Accessible doesn't work here.
// We return index in parent because image map contains area links only which
// are embedded objects.
// XXX: image map should be a hypertext accessible.
return IndexInParent();
}
uint32_t HTMLAreaAccessible::EndOffset() { return IndexInParent() + 1; }
nsRect HTMLAreaAccessible::RelativeBounds(nsIFrame** aBoundingFrame) const {
nsIFrame* frame = GetFrame();
if (!frame) return nsRect();
nsImageFrame* imageFrame = do_QueryFrame(frame);
nsImageMap* map = imageFrame->GetImageMap();
nsRect bounds;
nsresult rv = map->GetBoundsForAreaContent(mContent, bounds);
if (NS_FAILED(rv)) return nsRect();
// XXX Areas are screwy; they return their rects as a pair of points, one pair
// stored into the width and height.
*aBoundingFrame = frame;
bounds.SizeTo(bounds.Width() - bounds.X(), bounds.Height() - bounds.Y());
return bounds;
}
|