int TypeAhead::handleEvent(KeyboardEvent* event, MatchModeFlags matchMode)
{
if (event->timeStamp() < m_lastTypeTime)
return -1;
int optionCount = m_dataSource->optionCount();
DOMTimeStamp delta = event->timeStamp() - m_lastTypeTime;
m_lastTypeTime = event->timeStamp();
UChar c = event->charCode();
if (delta > typeAheadTimeout)
m_buffer.clear();
m_buffer.append(c);
if (optionCount < 1)
return -1;
int searchStartOffset = 1;
String prefix;
if (matchMode & CycleFirstChar && c == m_repeatingChar) {
// The user is likely trying to cycle through all the items starting
// with this character, so just search on the character.
prefix = String(&c, 1);
m_repeatingChar = c;
} else if (matchMode & MatchPrefix) {
prefix = m_buffer.toString();
if (m_buffer.length() > 1) {
m_repeatingChar = 0;
searchStartOffset = 0;
} else
m_repeatingChar = c;
}
if (!prefix.isEmpty()) {
int selected = m_dataSource->indexOfSelectedOption();
int index = (selected < 0 ? 0 : selected) + searchStartOffset;
index %= optionCount;
// Compute a case-folded copy of the prefix string before beginning the search for
// a matching element. This code uses foldCase to work around the fact that
// String::startWith does not fold non-ASCII characters. This code can be changed
// to use startWith once that is fixed.
String prefixWithCaseFolded(prefix.foldCase());
for (int i = 0; i < optionCount; ++i, index = (index + 1) % optionCount) {
// Fold the option string and check if its prefix is equal to the folded prefix.
String text = m_dataSource->optionAtIndex(index);
if (stripLeadingWhiteSpace(text).foldCase().startsWith(prefixWithCaseFolded))
return index;
}
}
if (matchMode & MatchIndex) {
bool ok = false;
int index = m_buffer.toString().toInt(&ok);
if (index > 0 && index <= optionCount)
return index - 1;
}
return -1;
}
void SelectElement::typeAheadFind(SelectElementData& data, Element* element, KeyboardEvent* event)
{
if (event->timeStamp() < data.lastCharTime())
return;
DOMTimeStamp delta = event->timeStamp() - data.lastCharTime();
data.setLastCharTime(event->timeStamp());
UChar c = event->charCode();
String prefix;
int searchStartOffset = 1;
if (delta > typeAheadTimeout) {
prefix = String(&c, 1);
data.setTypedString(prefix);
data.setRepeatingChar(c);
} else {
data.typedString().append(c);
if (c == data.repeatingChar())
// The user is likely trying to cycle through all the items starting with this character, so just search on the character
prefix = String(&c, 1);
else {
data.setRepeatingChar(0);
prefix = data.typedString();
searchStartOffset = 0;
}
}
const Vector<Element*>& items = data.listItems(element);
int itemCount = items.size();
if (itemCount < 1)
return;
int selected = selectedIndex(data, element);
int index = (optionToListIndex(data, element, selected >= 0 ? selected : 0) + searchStartOffset) % itemCount;
ASSERT(index >= 0);
for (int i = 0; i < itemCount; ++i, index = (index + 1) % itemCount) {
OptionElement* optionElement = toOptionElement(items[index]);
if (!optionElement || items[index]->disabled())
continue;
String text = optionElement->textIndentedToRespectGroupLabel();
if (stripLeadingWhiteSpace(text).startsWith(prefix, false)) {
setSelectedIndex(data, element, listToOptionIndex(data, element, index));
if (!data.usesMenuList())
listBoxOnChange(data, element);
element->setNeedsStyleRecalc();
return;
}
}
}
/**
* Collapses all white space in a string.
* All occurances of tab, line feed and carriage return are replaced with
* space, after which all sequences of spaces are collapsed to a single space.
*
* @param value The string to have all white space collapsed
* @return AxisString The string with all white space collapsed.
*/
const AxisString& WhiteSpace::collapseWhiteSpace(AxisString& value)
{
#ifdef ENABLE_AXISTRACE
if (axiscpp::AxisTrace::isTraceOn())
axiscpp::AxisTrace::traceEntry("WhiteSpace", "collapseWhiteSpace", this, 1,
TRACETYPE_STLSTRING, 0, ((void*)&value)); /* AUTOINSERTED TRACE */
#endif
if (value.empty ())
{
{
#ifdef ENABLE_AXISTRACE
const AxisString& traceRet = (value);
if (axiscpp::AxisTrace::isTraceOn())
axiscpp::AxisTrace::traceExit("WhiteSpace", "collapseWhiteSpace", this, 1,
TRACETYPE_STLSTRING, 0, ((void*)&traceRet)); /* AUTOINSERTED TRACE */
return traceRet;
#else
return value;
#endif
}
}
AxisString replacedValue = replaceWhiteSpace(value);
/*
* Strip leading and trailing space
*/
AxisString leadingStripped = stripLeadingWhiteSpace(replacedValue);
replacedValue = stripTrailingWhiteSpace(leadingStripped);
// Initialize return value to empty string
m_strReturnVal = "";
/*
* Find space character and returns the first any of chars find
* position
*/
unsigned long nPos = replacedValue.find_first_of (' ');
/* Check for position validity */
if (AxisString::npos == nPos)
{
m_strReturnVal.assign (replacedValue);
{
#ifdef ENABLE_AXISTRACE
const AxisString& traceRet = (m_strReturnVal);
if (axiscpp::AxisTrace::isTraceOn())
axiscpp::AxisTrace::traceExit("WhiteSpace", "collapseWhiteSpace", this, 2,
TRACETYPE_STLSTRING, 0, ((void*)&traceRet)); /* AUTOINSERTED TRACE */
return traceRet;
#else
return m_strReturnVal;
#endif
}
}
unsigned long nOldIdx = 0; // Counter value
while (AxisString::npos != nPos)
{
m_strReturnVal.append (replacedValue.substr (nOldIdx, nPos - nOldIdx));
/**
* Only copy space character across if it's NOT followed by
* another space character
*/
if ( replacedValue.at(nPos+1) != ' ')
{
m_strReturnVal.append (" ");
}
nOldIdx = ++nPos; // Get old position
/*
* Find the next entity reference characters from previous found
* position,
*/
nPos = replacedValue.find_first_of (' ', nPos);
}
unsigned long nDataLen = replacedValue.length (); // Get the length of the field value
unsigned long nLen = nDataLen - nOldIdx; // Get remaining number of characters
if (nLen > 0)
{
/*
* Append the remaining data
*/
m_strReturnVal += replacedValue.substr (nOldIdx, nLen);
}
{
#ifdef ENABLE_AXISTRACE
const AxisString& traceRet = (m_strReturnVal);
if (axiscpp::AxisTrace::isTraceOn())
axiscpp::AxisTrace::traceExit("WhiteSpace", "collapseWhiteSpace", this, 3,
TRACETYPE_STLSTRING, 0, ((void*)&traceRet)); /* AUTOINSERTED TRACE */
return traceRet;
#else
return m_strReturnVal;
#endif
}
}