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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
#include "DateTimeSymbolicFieldElement.h"
#include "FontCache.h"
#include "KeyboardEvent.h"
#include "RenderStyle.h"
#include "StyleResolver.h"
#include "TextBreakIterator.h"
#include "TextRun.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
static AtomicString makeVisibleEmptyValue(const Vector<String>& symbols)
{
unsigned maximumLength = 0;
for (unsigned index = 0; index < symbols.size(); ++index)
maximumLength = std::max(maximumLength, numGraphemeClusters(symbols[index]));
StringBuilder builder;
builder.reserveCapacity(maximumLength);
for (unsigned length = 0; length < maximumLength; ++length)
builder.append('-');
return builder.toAtomicString();
}
DateTimeSymbolicFieldElement::DateTimeSymbolicFieldElement(Document* document, FieldOwner& fieldOwner, const Vector<String>& symbols)
: DateTimeFieldElement(document, fieldOwner)
, m_symbols(symbols)
, m_visibleEmptyValue(makeVisibleEmptyValue(symbols))
, m_selectedIndex(-1)
, m_typeAhead(this)
{
ASSERT(!symbols.isEmpty());
setHasCustomCallbacks();
}
PassRefPtr<RenderStyle> DateTimeSymbolicFieldElement::customStyleForRenderer()
{
FontCachePurgePreventer fontCachePurgePreventer;
RefPtr<RenderStyle> originalStyle = document()->styleResolver()->styleForElement(this);
RefPtr<RenderStyle> style = RenderStyle::clone(originalStyle.get());
float maximumWidth = style->font().width(visibleEmptyValue());
for (unsigned index = 0; index < m_symbols.size(); ++index)
maximumWidth = std::max(maximumWidth, style->font().width(m_symbols[index]));
style->setMinWidth(Length(maximumWidth, Fixed));
return style.release();
}
void DateTimeSymbolicFieldElement::handleKeyboardEvent(KeyboardEvent* keyboardEvent)
{
if (keyboardEvent->type() != eventNames().keypressEvent)
return;
const UChar charCode = WTF::Unicode::toLower(keyboardEvent->charCode());
if (charCode < ' ')
return;
keyboardEvent->setDefaultHandled();
int index = m_typeAhead.handleEvent(keyboardEvent, TypeAhead::MatchPrefix | TypeAhead::CycleFirstChar | TypeAhead::MatchIndex);
if (index < 0)
return;
setValueAsInteger(index, DispatchEvent);
}
bool DateTimeSymbolicFieldElement::hasValue() const
{
return m_selectedIndex >= 0;
}
int DateTimeSymbolicFieldElement::maximum() const
{
return static_cast<int>(m_symbols.size());
}
int DateTimeSymbolicFieldElement::minimum() const
{
return 1;
}
void DateTimeSymbolicFieldElement::setEmptyValue(EventBehavior eventBehavior)
{
m_selectedIndex = invalidIndex;
updateVisibleValue(eventBehavior);
}
void DateTimeSymbolicFieldElement::setValueAsInteger(int newSelectedIndex, EventBehavior eventBehavior)
{
m_selectedIndex = std::max(0, std::min(newSelectedIndex, static_cast<int>(m_symbols.size() - 1)));
updateVisibleValue(eventBehavior);
}
void DateTimeSymbolicFieldElement::stepDown()
{
const int size = m_symbols.size();
m_selectedIndex = hasValue() ? (m_selectedIndex + size - 1) % size : size - 1;
updateVisibleValue(DispatchEvent);
}
void DateTimeSymbolicFieldElement::stepUp()
{
m_selectedIndex = hasValue() ? (m_selectedIndex + 1) % m_symbols.size() : 0;
updateVisibleValue(DispatchEvent);
}
String DateTimeSymbolicFieldElement::value() const
{
return hasValue() ? m_symbols[m_selectedIndex] : emptyString();
}
int DateTimeSymbolicFieldElement::valueAsInteger() const
{
return m_selectedIndex;
}
String DateTimeSymbolicFieldElement::visibleEmptyValue() const
{
return m_visibleEmptyValue;
}
String DateTimeSymbolicFieldElement::visibleValue() const
{
return hasValue() ? m_symbols[m_selectedIndex] : visibleEmptyValue();
}
int DateTimeSymbolicFieldElement::indexOfSelectedOption() const
{
return m_selectedIndex;
}
int DateTimeSymbolicFieldElement::optionCount() const
{
return m_symbols.size();
}
String DateTimeSymbolicFieldElement::optionAtIndex(int index) const
{
return m_symbols[index];
}
} // namespace WebCore
#endif
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