QTextCursor ScCodeEditor::selectionForPosition( int position )
{
QTextBlock block( textDocument()->findBlock(position) );
if (!block.isValid())
return QTextCursor();
int positionInBlock = position - block.position();
TokenIterator it = TokenIterator( block, positionInBlock );
if (it.type() == Token::Unknown) {
// Token is invalid, or Token::Unknown (i.e. punctuations).
// Prefer token at previous position.
TokenIterator alternativeIt = TokenIterator( block, positionInBlock - 1 );
if (alternativeIt.isValid())
it = alternativeIt;
}
if (it.isValid()) {
switch (it->type) {
case Token::OpeningBracket:
case Token::ClosingBracket:
{
BracketPair match;
matchBracket(it, match);
if (match.first.isValid() && match.second.isValid()) {
int start = match.first.position();
int end = match.second.position() + 1;
QTextCursor selection(textDocument());
if (it == match.second) {
selection.setPosition(start);
selection.setPosition(end, QTextCursor::KeepAnchor);
} else {
selection.setPosition(end);
selection.setPosition(start, QTextCursor::KeepAnchor);
}
return selection;
}
break;
}
default:
QTextCursor selection( textDocument() );
selection.setPosition( it.position() );
selection.setPosition( selection.position() + it->length, QTextCursor::KeepAnchor );
return selection;
}
}
return QTextCursor();
}
void ScCodeEditor::gotoNextBlock()
{
QTextCursor cursor = textCursor();
TokenIterator tokenIt = TokenIterator::rightOf( cursor.block(), cursor.positionInBlock() );
if (tokenIt.type() == Token::OpeningBracket
&& tokenIt.block() == cursor.block()
&& tokenIt->positionInBlock == cursor.positionInBlock())
++tokenIt;
tokenIt = nextClosingBracket( tokenIt );
if (tokenIt.isValid())
setTextCursor( cursorAt(tokenIt, 1) );
else {
cursor.movePosition( QTextCursor::End );
setTextCursor( cursor );
}
}
void ScCodeEditor::gotoPreviousBlock()
{
QTextCursor cursor = textCursor();
TokenIterator tokenIt = TokenIterator::leftOf(cursor.block(), cursor.positionInBlock());
if (tokenIt.type() == Token::ClosingBracket
&& tokenIt.block() == cursor.block()
&& tokenIt->positionInBlock == cursor.positionInBlock() - 1)
--tokenIt;
tokenIt = previousOpeningBracket( tokenIt );
if (tokenIt.isValid())
setTextCursor( cursorAt(tokenIt) );
else {
cursor.movePosition( QTextCursor::Start );
setTextCursor( cursor );
}
}
void ScCodeEditor::keyPressEvent( QKeyEvent *e )
{
hideMouseCursor(e);
QTextCursor cursor( textCursor() );
bool cursorMoved = true;
if (e == QKeySequence::MoveToNextWord)
moveToNextToken( cursor, QTextCursor::MoveAnchor );
else if (e == QKeySequence::MoveToPreviousWord)
moveToPreviousToken( cursor, QTextCursor::MoveAnchor );
else if (e == QKeySequence::SelectNextWord)
moveToNextToken( cursor, QTextCursor::KeepAnchor );
else if (e == QKeySequence::SelectPreviousWord)
moveToPreviousToken( cursor, QTextCursor::KeepAnchor );
else
cursorMoved = false;
if (cursorMoved) {
setTextCursor( cursor );
return;
}
switch (e->key()) {
case Qt::Key_Home:
{
Qt::KeyboardModifiers mods(e->modifiers());
if (mods && mods != Qt::ShiftModifier) {
GenericCodeEditor::keyPressEvent(e);
return;
}
QTextCursor::MoveMode mode =
mods & Qt::ShiftModifier ? QTextCursor::KeepAnchor : QTextCursor::MoveAnchor;
QTextCursor c(textCursor());
QTextBlock b(c.block());
int pos = indentedStartOfLine(b);
pos += b.position();
if (c.position() == pos)
c.movePosition(QTextCursor::StartOfLine, mode);
else
c.setPosition(pos, mode);
setTextCursor(c);
return;
}
case Qt::Key_Backtab:
{
QTextCursor cursor = textCursor();
insertSpaceToNextTabStop( cursor );
ensureCursorVisible();
return;
}
case Qt::Key_Backspace:
if (mInsertMatchingTokens && !overwriteMode() && e->modifiers() == 0)
if (removeMatchingTokens())
break;
GenericCodeEditor::keyPressEvent(e);
break;
case Qt::Key_Enter:
case Qt::Key_Return:
{
QTextBlock cursorBlock = cursor.block();
int cursorPosInBlock = cursor.position() - cursorBlock.position();
TokenIterator nextToken = TokenIterator::rightOf(cursorBlock, cursorPosInBlock);
if ( nextToken.block() == cursorBlock && nextToken.type() == Token::ClosingBracket )
{
cursor.beginEditBlock();
cursor.insertBlock();
cursor.insertBlock();
cursor.endEditBlock();
cursor.movePosition( QTextCursor::PreviousBlock, QTextCursor::KeepAnchor );
indent(cursor, JoinEditBlock);
cursor.movePosition( QTextCursor::EndOfBlock );
}
else {
cursor.beginEditBlock();
cursor.insertBlock();
cursor.endEditBlock();
indent(cursor, JoinEditBlock);
}
cursor.setVerticalMovementX(-1);
setTextCursor(cursor);
break;
}
default:
if (!overwriteMode() && insertMatchingTokens(e->text()))
break;
GenericCodeEditor::keyPressEvent(e);
}
mAutoCompleter->keyPress(e);
}