QComposeInputContext::QComposeInputContext()
{
TableGenerator reader;
m_tableState = reader.tableState();
if ((m_tableState & TableGenerator::NoErrors) == TableGenerator::NoErrors) {
m_composeTable = reader.composeTable();
clearComposeBuffer();
}
}
bool QComposeInputContext::checkComposeTable()
{
if (!m_compositionTableInitialized) {
TableGenerator reader;
m_tableState = reader.tableState();
m_compositionTableInitialized = true;
if ((m_tableState & TableGenerator::NoErrors) == TableGenerator::NoErrors) {
m_composeTable = reader.composeTable();
} else {
#ifdef DEBUG_COMPOSING
qDebug( "### FAILED_PARSING ###" );
#endif
// if we have errors, don' try to look things up anyways.
reset();
return false;
}
}
Q_ASSERT(!m_composeTable.isEmpty());
QVector<QComposeTableElement>::const_iterator it =
std::lower_bound(m_composeTable.constBegin(), m_composeTable.constEnd(), m_composeBuffer, ByKeys());
// prevent dereferencing an 'end' iterator, which would result in a crash
if (it == m_composeTable.constEnd())
it -= 1;
QComposeTableElement elem = *it;
// would be nicer if qLowerBound had API that tells if the item was actually found
if (m_composeBuffer[0] != elem.keys[0]) {
#ifdef DEBUG_COMPOSING
qDebug( "### no match ###" );
#endif
reset();
return false;
}
// check if compose buffer is matched
for (int i=0; i < QT_KEYSEQUENCE_MAX_LEN; i++) {
// check if partial match
if (m_composeBuffer[i] == 0 && elem.keys[i]) {
#ifdef DEBUG_COMPOSING
qDebug("### partial match ###");
#endif
return true;
}
if (m_composeBuffer[i] != elem.keys[i]) {
#ifdef DEBUG_COMPOSING
qDebug("### different entry ###");
#endif
reset();
return i != 0;
}
}
#ifdef DEBUG_COMPOSING
qDebug("### match exactly ###");
#endif
// check if the key sequence is overwriten - see the comment in
// TableGenerator::orderComposeTable()
int next = 1;
do {
// if we are at the end of the table, then we have nothing to do here
if (it + next != m_composeTable.constEnd()) {
QComposeTableElement nextElem = *(it + next);
if (isDuplicate(elem, nextElem)) {
elem = nextElem;
next++;
continue;
} else {
break;
}
}
break;
} while (true);
commitText(elem.value);
reset();
return true;
}