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#include "tagwidget.h"
#include <QPair>
#include <QDebug>
#include <QAbstractItemView>
TagWidget::TagWidget(QWidget *parent) : GroupedLineEdit(parent), m_completer(NULL)
{
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(reparse()));
connect(this, SIGNAL(textChanged()), this, SLOT(reparse()));
addColor(QColor(0x00, 0xAE, 0xFF));
addColor(QColor(0x00, 0x78, 0xB0));
}
void TagWidget::setCompleter(QCompleter *completer)
{
m_completer = completer;
m_completer->setWidget(this);
connect(m_completer, SIGNAL(activated(QString)), this, SLOT(completionSelected(QString)));
connect(m_completer, SIGNAL(highlighted(QString)), this, SLOT(completionSelected(QString)));
}
QPair<int,int> TagWidget::getCursorTagPosition() {
int i = 0, start = 0, end = 0;
/* Parse string near cursor */
i = cursorPosition();
while (--i > 0) {
if (text().at(i) == ',') {
if (i > 0 && text().at(i-1) != '\\') {
i++;
break;
}
}
}
start = i;
while (++i < text().length()) {
if (text().at(i) == ',') {
if (i > 0 && text().at(i-1) != '\\')
break;
}
}
end = i;
if (start < 0 || end < 0) {
start = 0;
end = 0;
}
return QPair<int,int>(start,end);
}
enum ParseState {FINDSTART, FINDEND};
void TagWidget::highlight() {
int i = 0, start = 0, end = 0;
ParseState state = FINDEND;
removeAllBlocks();
while(i < text().length()) {
if (text().at(i) == ',') {
if (state == FINDSTART) {
/* Detect empty tags */
} else if (state == FINDEND) {
/* Found end of tag */
if (i > 1) {
if(text().at(i-1) != '\\') {
addBlock(start, end);
state = FINDSTART;
}
} else {
state = FINDSTART;
}
}
} else if (text().at(i) == ' ') {
/* Handled */
} else {
/* Found start of tag */
if (state == FINDSTART) {
state = FINDEND;
start = i;
} else if (state == FINDEND) {
end = i;
}
}
i++;
}
if (state == FINDEND) {
if (end < start)
end = text().length()-1;
if (text().length() > 0)
addBlock(start, end);
}
}
void TagWidget::reparse()
{
highlight();
QPair<int,int> pos = getCursorTagPosition();
QString currentText;
if (pos.first >= 0 && pos.second > 0)
currentText = text().mid(pos.first, pos.second-pos.first).trimmed();
else
currentText = "";
if (m_completer) {
m_completer->setCompletionPrefix(currentText);
if (m_completer->completionCount() == 1) {
if (m_completer->currentCompletion() == currentText) {
QAbstractItemView *popup = m_completer->popup();
if (popup)
popup->hide();
}
else
m_completer->complete();
} else {
m_completer->complete();
}
}
}
void TagWidget::completionSelected(QString completion) {
QPair <int,int> pos;
pos = getCursorTagPosition();
if (pos.first >= 0 && pos.second > 0) {
setText(text().remove(pos.first, pos.second-pos.first).insert(pos.first, completion));
setCursorPosition(pos.first+completion.length());
}
else {
setText(completion.append(", "));
setCursorPosition(text().length());
}
}
void TagWidget::setCursorPosition(int position) {
blockSignals(true);
GroupedLineEdit::setCursorPosition(position);
blockSignals(false);
}
void TagWidget::setText(QString text) {
blockSignals(true);
GroupedLineEdit::setText(text);
blockSignals(false);
highlight();
}
void TagWidget::clear() {
blockSignals(true);
GroupedLineEdit::clear();
blockSignals(false);
}
void TagWidget::keyPressEvent(QKeyEvent *e) {
switch (e->key()) {
case Qt::Key_Return:
case Qt::Key_Enter:
case Qt::Key_Tab:
/*
* Fake the QLineEdit behaviour by simply
* closing the QAbstractViewitem
*/
if (m_completer) {
QAbstractItemView *popup = m_completer->popup();
if (popup)
popup->hide();
}
}
if (e->key() == Qt::Key_Tab) { // let's pretend this is a comma instead
QKeyEvent *fakeEvent = new QKeyEvent(e->type(), Qt::Key_Comma, e->modifiers(), QString(","));
GroupedLineEdit::keyPressEvent(fakeEvent);
free(fakeEvent);
} else {
GroupedLineEdit::keyPressEvent(e);
}
}
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