1 /*
2 * Copyright (C) 2013, Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "config.h"
30 #include "core/accessibility/AXInlineTextBox.h"
31
32 #include "core/accessibility/AXObjectCache.h"
33 #include "core/dom/Range.h"
34 #include "core/rendering/RenderText.h"
35 #include "platform/LayoutUnit.h"
36
37
38 namespace blink {
39
40 using namespace HTMLNames;
41
AXInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox)42 AXInlineTextBox::AXInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
43 : m_inlineTextBox(inlineTextBox)
44 {
45 RenderText* renderText = m_inlineTextBox->renderText();
46 m_axObjectCache = renderText->document().axObjectCache();
47 }
48
~AXInlineTextBox()49 AXInlineTextBox::~AXInlineTextBox()
50 {
51 if (m_axObjectCache && m_inlineTextBox)
52 m_axObjectCache->remove(m_inlineTextBox.get());
53 }
54
create(PassRefPtr<AbstractInlineTextBox> inlineTextBox)55 PassRefPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
56 {
57 return adoptRef(new AXInlineTextBox(inlineTextBox));
58 }
59
init()60 void AXInlineTextBox::init()
61 {
62 }
63
detach()64 void AXInlineTextBox::detach()
65 {
66 m_inlineTextBox = nullptr;
67 m_axObjectCache = 0;
68 AXObject::detach();
69 }
70
elementRect() const71 LayoutRect AXInlineTextBox::elementRect() const
72 {
73 if (!m_inlineTextBox)
74 return LayoutRect();
75
76 return m_inlineTextBox->bounds();
77 }
78
computeAccessibilityIsIgnored() const79 bool AXInlineTextBox::computeAccessibilityIsIgnored() const
80 {
81 if (AXObject* parent = parentObject())
82 return parent->accessibilityIsIgnored();
83
84 return false;
85 }
86
textCharacterOffsets(Vector<int> & offsets) const87 void AXInlineTextBox::textCharacterOffsets(Vector<int>& offsets) const
88 {
89 if (!m_inlineTextBox)
90 return;
91
92 unsigned len = m_inlineTextBox->len();
93 Vector<float> widths;
94 m_inlineTextBox->characterWidths(widths);
95 ASSERT(widths.size() == len);
96 offsets.resize(len);
97
98 float widthSoFar = 0;
99 for (unsigned i = 0; i < len; i++) {
100 widthSoFar += widths[i];
101 offsets[i] = lroundf(widthSoFar);
102 }
103 }
104
wordBoundaries(Vector<PlainTextRange> & words) const105 void AXInlineTextBox::wordBoundaries(Vector<PlainTextRange>& words) const
106 {
107 if (!m_inlineTextBox)
108 return;
109
110 Vector<AbstractInlineTextBox::WordBoundaries> wordBoundaries;
111 m_inlineTextBox->wordBoundaries(wordBoundaries);
112 words.resize(wordBoundaries.size());
113 for (unsigned i = 0; i < wordBoundaries.size(); i++)
114 words[i] = PlainTextRange(wordBoundaries[i].startIndex, wordBoundaries[i].endIndex - wordBoundaries[i].startIndex);
115 }
116
stringValue() const117 String AXInlineTextBox::stringValue() const
118 {
119 if (!m_inlineTextBox)
120 return String();
121
122 return m_inlineTextBox->text();
123 }
124
parentObject() const125 AXObject* AXInlineTextBox::parentObject() const
126 {
127 if (!m_inlineTextBox || !m_axObjectCache)
128 return 0;
129
130 RenderText* renderText = m_inlineTextBox->renderText();
131 return m_axObjectCache->getOrCreate(renderText);
132 }
133
textDirection() const134 AccessibilityTextDirection AXInlineTextBox::textDirection() const
135 {
136 if (!m_inlineTextBox)
137 return AccessibilityTextDirectionLeftToRight;
138
139 switch (m_inlineTextBox->direction()) {
140 case AbstractInlineTextBox::LeftToRight:
141 return AccessibilityTextDirectionLeftToRight;
142 case AbstractInlineTextBox::RightToLeft:
143 return AccessibilityTextDirectionRightToLeft;
144 case AbstractInlineTextBox::TopToBottom:
145 return AccessibilityTextDirectionTopToBottom;
146 case AbstractInlineTextBox::BottomToTop:
147 return AccessibilityTextDirectionBottomToTop;
148 }
149
150 return AccessibilityTextDirectionLeftToRight;
151 }
152
153 } // namespace blink
154