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
38namespace blink {
39
40using namespace HTMLNames;
41
42AXInlineTextBox::AXInlineTextBox(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
43    : m_inlineTextBox(inlineTextBox)
44{
45    RenderText* renderText = m_inlineTextBox->renderText();
46    m_axObjectCache = renderText->document().axObjectCache();
47}
48
49AXInlineTextBox::~AXInlineTextBox()
50{
51    if (m_axObjectCache && m_inlineTextBox)
52        m_axObjectCache->remove(m_inlineTextBox.get());
53}
54
55PassRefPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox)
56{
57    return adoptRef(new AXInlineTextBox(inlineTextBox));
58}
59
60void AXInlineTextBox::init()
61{
62}
63
64void AXInlineTextBox::detach()
65{
66    m_inlineTextBox = nullptr;
67    m_axObjectCache = 0;
68    AXObject::detach();
69}
70
71LayoutRect AXInlineTextBox::elementRect() const
72{
73    if (!m_inlineTextBox)
74        return LayoutRect();
75
76    return m_inlineTextBox->bounds();
77}
78
79bool AXInlineTextBox::computeAccessibilityIsIgnored() const
80{
81    if (AXObject* parent = parentObject())
82        return parent->accessibilityIsIgnored();
83
84    return false;
85}
86
87void 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
105void 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
117String AXInlineTextBox::stringValue() const
118{
119    if (!m_inlineTextBox)
120        return String();
121
122    return m_inlineTextBox->text();
123}
124
125AXObject* 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
134AccessibilityTextDirection 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