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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/rendering/AbstractInlineTextBox.h"
33
34#include "core/editing/TextIterator.h"
35#include "platform/text/TextBreakIterator.h"
36
37namespace blink {
38
39AbstractInlineTextBox::InlineToAbstractInlineTextBoxHashMap* AbstractInlineTextBox::gAbstractInlineTextBoxMap = 0;
40
41PassRefPtr<AbstractInlineTextBox> AbstractInlineTextBox::getOrCreate(RenderText* renderText, InlineTextBox* inlineTextBox)
42{
43    if (!inlineTextBox)
44        return nullptr;
45
46    if (!gAbstractInlineTextBoxMap)
47        gAbstractInlineTextBoxMap = new InlineToAbstractInlineTextBoxHashMap();
48
49    InlineToAbstractInlineTextBoxHashMap::const_iterator it = gAbstractInlineTextBoxMap->find(inlineTextBox);
50    if (it != gAbstractInlineTextBoxMap->end())
51        return it->value;
52
53    RefPtr<AbstractInlineTextBox> obj = adoptRef(new AbstractInlineTextBox(renderText, inlineTextBox));
54    gAbstractInlineTextBoxMap->set(inlineTextBox, obj);
55    return obj;
56}
57
58void AbstractInlineTextBox::willDestroy(InlineTextBox* inlineTextBox)
59{
60    if (!gAbstractInlineTextBoxMap)
61        return;
62
63    InlineToAbstractInlineTextBoxHashMap::const_iterator it = gAbstractInlineTextBoxMap->find(inlineTextBox);
64    if (it != gAbstractInlineTextBoxMap->end()) {
65        it->value->detach();
66        gAbstractInlineTextBoxMap->remove(inlineTextBox);
67    }
68}
69
70void AbstractInlineTextBox::detach()
71{
72    m_renderText = 0;
73    m_inlineTextBox = 0;
74}
75
76PassRefPtr<AbstractInlineTextBox> AbstractInlineTextBox::nextInlineTextBox() const
77{
78    if (!m_inlineTextBox)
79        return nullptr;
80
81    return getOrCreate(m_renderText, m_inlineTextBox->nextTextBox());
82}
83
84LayoutRect AbstractInlineTextBox::bounds() const
85{
86    if (!m_inlineTextBox || !m_renderText)
87        return LayoutRect();
88
89    FloatRect boundaries = m_inlineTextBox->calculateBoundaries();
90    return m_renderText->localToAbsoluteQuad(boundaries).enclosingBoundingBox();
91}
92
93unsigned AbstractInlineTextBox::start() const
94{
95    if (!m_inlineTextBox)
96        return 0;
97
98    return m_inlineTextBox->start();
99}
100
101unsigned AbstractInlineTextBox::len() const
102{
103    if (!m_inlineTextBox)
104        return 0;
105
106    return m_inlineTextBox->len();
107}
108
109AbstractInlineTextBox::Direction AbstractInlineTextBox::direction() const
110{
111    if (!m_inlineTextBox || !m_renderText)
112        return LeftToRight;
113
114    if (m_renderText->style()->isHorizontalWritingMode())
115        return (m_inlineTextBox->direction() == RTL ? RightToLeft : LeftToRight);
116    return (m_inlineTextBox->direction() == RTL ? BottomToTop : TopToBottom);
117}
118
119void AbstractInlineTextBox::characterWidths(Vector<float>& widths) const
120{
121    if (!m_inlineTextBox)
122        return;
123
124    m_inlineTextBox->characterWidths(widths);
125}
126
127void AbstractInlineTextBox::wordBoundaries(Vector<WordBoundaries>& words) const
128{
129    if (!m_inlineTextBox)
130        return;
131
132    String text = this->text();
133    int len = text.length();
134    TextBreakIterator* iterator = wordBreakIterator(text, 0, len);
135
136    // FIXME: When http://crbug.com/411764 is fixed, replace this with an ASSERT.
137    if (!iterator)
138        return;
139
140    int pos = iterator->first();
141    while (pos >= 0 && pos < len) {
142        int next = iterator->next();
143        if (isWordTextBreak(iterator))
144            words.append(WordBoundaries(pos, next));
145        pos = next;
146    }
147}
148
149String AbstractInlineTextBox::text() const
150{
151    if (!m_inlineTextBox || !m_renderText)
152        return String();
153
154    unsigned start = m_inlineTextBox->start();
155    unsigned len = m_inlineTextBox->len();
156    if (Node* node = m_renderText->node()) {
157        RefPtrWillBeRawPtr<Range> range = Range::create(node->document());
158        range->setStart(node, start, IGNORE_EXCEPTION);
159        range->setEnd(node, start + len, IGNORE_EXCEPTION);
160        return plainText(range.get(), TextIteratorIgnoresStyleVisibility);
161    }
162
163    String result = m_renderText->text().substring(start, len).simplifyWhiteSpace(WTF::DoNotStripWhiteSpace);
164    if (m_inlineTextBox->nextTextBox() && m_inlineTextBox->nextTextBox()->start() > m_inlineTextBox->end() && result.length() && !result.right(1).containsOnlyWhitespace())
165        return result + " ";
166    return result;
167}
168
169} // namespace blink
170