Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 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/dom/KeyboardEvent.h" |
| 31 | #include "core/platform/graphics/Font.h" |
| 32 | #include "core/platform/text/TextBreakIterator.h" |
Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame] | 33 | #include "wtf/text/StringBuilder.h" |
| 34 | #include "wtf/unicode/Unicode.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 35 | |
| 36 | namespace WebCore { |
| 37 | |
| 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 | |
| 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 | |
| 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 | |
| 73 | void DateTimeSymbolicFieldElement::handleKeyboardEvent(KeyboardEvent* keyboardEvent) |
| 74 | { |
| 75 | if (keyboardEvent->type() != eventNames().keypressEvent) |
| 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 | |
| 90 | bool DateTimeSymbolicFieldElement::hasValue() const |
| 91 | { |
| 92 | return m_selectedIndex >= 0; |
| 93 | } |
| 94 | |
| 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 | |
| 103 | void DateTimeSymbolicFieldElement::setEmptyValue(EventBehavior eventBehavior) |
| 104 | { |
| 105 | if (isDisabled()) |
| 106 | return; |
| 107 | m_selectedIndex = invalidIndex; |
| 108 | updateVisibleValue(eventBehavior); |
| 109 | } |
| 110 | |
| 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 | |
| 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 | |
| 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 | |
| 137 | String DateTimeSymbolicFieldElement::value() const |
| 138 | { |
| 139 | return hasValue() ? m_symbols[m_selectedIndex] : emptyString(); |
| 140 | } |
| 141 | |
| 142 | int DateTimeSymbolicFieldElement::valueAsInteger() const |
| 143 | { |
| 144 | return m_selectedIndex; |
| 145 | } |
| 146 | |
| 147 | int DateTimeSymbolicFieldElement::valueForARIAValueNow() const |
| 148 | { |
| 149 | // Synchronize with minimum/maximum adjustment in initialize(). |
| 150 | return m_selectedIndex + 1; |
| 151 | } |
| 152 | |
| 153 | String DateTimeSymbolicFieldElement::visibleEmptyValue() const |
| 154 | { |
| 155 | return m_visibleEmptyValue; |
| 156 | } |
| 157 | |
| 158 | String DateTimeSymbolicFieldElement::visibleValue() const |
| 159 | { |
| 160 | return hasValue() ? m_symbols[m_selectedIndex] : visibleEmptyValue(); |
| 161 | } |
| 162 | |
| 163 | int DateTimeSymbolicFieldElement::indexOfSelectedOption() const |
| 164 | { |
| 165 | return m_selectedIndex; |
| 166 | } |
| 167 | |
| 168 | int DateTimeSymbolicFieldElement::optionCount() const |
| 169 | { |
| 170 | return m_symbols.size(); |
| 171 | } |
| 172 | |
| 173 | String DateTimeSymbolicFieldElement::optionAtIndex(int index) const |
| 174 | { |
| 175 | return m_symbols[index]; |
| 176 | } |
| 177 | |
| 178 | } // namespace WebCore |
| 179 | |
| 180 | #endif |