1 /*
2 * Copyright (C) 2012 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 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
28 #include "core/html/shadow/DateTimeSymbolicFieldElement.h"
29
30 #include "core/events/KeyboardEvent.h"
31 #include "platform/fonts/Font.h"
32 #include "platform/text/TextBreakIterator.h"
33 #include "wtf/text/StringBuilder.h"
34 #include "wtf/unicode/Unicode.h"
35
36 namespace WebCore {
37
makeVisibleEmptyValue(const Vector<String> & symbols)38 static AtomicString makeVisibleEmptyValue(const Vector<String>& symbols)
39 {
40 unsigned maximumLength = 0;
41 for (unsigned index = 0; index < symbols.size(); ++index)
42 maximumLength = std::max(maximumLength, numGraphemeClusters(symbols[index]));
43 StringBuilder builder;
44 builder.reserveCapacity(maximumLength);
45 for (unsigned length = 0; length < maximumLength; ++length)
46 builder.append('-');
47 return builder.toAtomicString();
48 }
49
DateTimeSymbolicFieldElement(Document & document,FieldOwner & fieldOwner,const Vector<String> & symbols,int minimum,int maximum)50 DateTimeSymbolicFieldElement::DateTimeSymbolicFieldElement(Document& document, FieldOwner& fieldOwner, const Vector<String>& symbols, int minimum, int maximum)
51 : DateTimeFieldElement(document, fieldOwner)
52 , m_symbols(symbols)
53 , m_visibleEmptyValue(makeVisibleEmptyValue(symbols))
54 , m_selectedIndex(-1)
55 , m_typeAhead(this)
56 , m_minimumIndex(minimum)
57 , m_maximumIndex(maximum)
58 {
59 ASSERT(!symbols.isEmpty());
60 ASSERT(m_minimumIndex >= 0);
61 ASSERT_WITH_SECURITY_IMPLICATION(m_maximumIndex < static_cast<int>(m_symbols.size()));
62 ASSERT(m_minimumIndex <= m_maximumIndex);
63 }
64
maximumWidth(const Font & font)65 float DateTimeSymbolicFieldElement::maximumWidth(const Font& font)
66 {
67 float maximumWidth = font.width(visibleEmptyValue());
68 for (unsigned index = 0; index < m_symbols.size(); ++index)
69 maximumWidth = std::max(maximumWidth, font.width(m_symbols[index]));
70 return maximumWidth + DateTimeFieldElement::maximumWidth(font);
71 }
72
handleKeyboardEvent(KeyboardEvent * keyboardEvent)73 void DateTimeSymbolicFieldElement::handleKeyboardEvent(KeyboardEvent* keyboardEvent)
74 {
75 if (keyboardEvent->type() != EventTypeNames::keypress)
76 return;
77
78 const UChar charCode = WTF::Unicode::toLower(keyboardEvent->charCode());
79 if (charCode < ' ')
80 return;
81
82 keyboardEvent->setDefaultHandled();
83
84 int index = m_typeAhead.handleEvent(keyboardEvent, TypeAhead::MatchPrefix | TypeAhead::CycleFirstChar | TypeAhead::MatchIndex);
85 if (index < 0)
86 return;
87 setValueAsInteger(index, DispatchEvent);
88 }
89
hasValue() const90 bool DateTimeSymbolicFieldElement::hasValue() const
91 {
92 return m_selectedIndex >= 0;
93 }
94
initialize(const AtomicString & pseudo,const String & axHelpText)95 void DateTimeSymbolicFieldElement::initialize(const AtomicString& pseudo, const String& axHelpText)
96 {
97 // The minimum and maximum below are exposed to users, and 1-based numbers
98 // are natural for symbolic fields. For example, the minimum value of a
99 // month field should be 1, not 0.
100 DateTimeFieldElement::initialize(pseudo, axHelpText, m_minimumIndex + 1, m_maximumIndex + 1);
101 }
102
setEmptyValue(EventBehavior eventBehavior)103 void DateTimeSymbolicFieldElement::setEmptyValue(EventBehavior eventBehavior)
104 {
105 if (isDisabled())
106 return;
107 m_selectedIndex = invalidIndex;
108 updateVisibleValue(eventBehavior);
109 }
110
setValueAsInteger(int newSelectedIndex,EventBehavior eventBehavior)111 void DateTimeSymbolicFieldElement::setValueAsInteger(int newSelectedIndex, EventBehavior eventBehavior)
112 {
113 m_selectedIndex = std::max(0, std::min(newSelectedIndex, static_cast<int>(m_symbols.size() - 1)));
114 updateVisibleValue(eventBehavior);
115 }
116
stepDown()117 void DateTimeSymbolicFieldElement::stepDown()
118 {
119 if (hasValue()) {
120 if (!indexIsInRange(--m_selectedIndex))
121 m_selectedIndex = m_maximumIndex;
122 } else
123 m_selectedIndex = m_maximumIndex;
124 updateVisibleValue(DispatchEvent);
125 }
126
stepUp()127 void DateTimeSymbolicFieldElement::stepUp()
128 {
129 if (hasValue()) {
130 if (!indexIsInRange(++m_selectedIndex))
131 m_selectedIndex = m_minimumIndex;
132 } else
133 m_selectedIndex = m_minimumIndex;
134 updateVisibleValue(DispatchEvent);
135 }
136
value() const137 String DateTimeSymbolicFieldElement::value() const
138 {
139 return hasValue() ? m_symbols[m_selectedIndex] : emptyString();
140 }
141
valueAsInteger() const142 int DateTimeSymbolicFieldElement::valueAsInteger() const
143 {
144 return m_selectedIndex;
145 }
146
valueForARIAValueNow() const147 int DateTimeSymbolicFieldElement::valueForARIAValueNow() const
148 {
149 // Synchronize with minimum/maximum adjustment in initialize().
150 return m_selectedIndex + 1;
151 }
152
visibleEmptyValue() const153 String DateTimeSymbolicFieldElement::visibleEmptyValue() const
154 {
155 return m_visibleEmptyValue;
156 }
157
visibleValue() const158 String DateTimeSymbolicFieldElement::visibleValue() const
159 {
160 return hasValue() ? m_symbols[m_selectedIndex] : visibleEmptyValue();
161 }
162
indexOfSelectedOption() const163 int DateTimeSymbolicFieldElement::indexOfSelectedOption() const
164 {
165 return m_selectedIndex;
166 }
167
optionCount() const168 int DateTimeSymbolicFieldElement::optionCount() const
169 {
170 return m_symbols.size();
171 }
172
optionAtIndex(int index) const173 String DateTimeSymbolicFieldElement::optionAtIndex(int index) const
174 {
175 return m_symbols[index];
176 }
177
178 } // namespace WebCore
179
180 #endif
181