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// SPDX-License-Identifier: GPL-2.0
#include "tagwidget.h"
#include "mainwindow.h"
#include "tab-widgets/maintab.h"
#include <QCompleter>
#include <QMimeData>
TagWidget::TagWidget(QWidget *parent) : GroupedLineEdit(parent), m_completer(NULL), lastFinishedTag(false)
{
connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(reparse()));
connect(this, SIGNAL(textChanged()), this, SLOT(reparse()));
QColor textColor = palette().color(QPalette::Text);
qreal h, s, l, a;
textColor.getHslF(&h, &s, &l, &a);
// I use dark themes
if (l <= 0.3) { // very dark text. get a brigth background
addColor(QColor(Qt::red).lighter(120));
addColor(QColor(Qt::green).lighter(120));
addColor(QColor(Qt::blue).lighter(120));
} else if (l <= 0.6) { // moderated dark text. get a somewhat bright background
addColor(QColor(Qt::red).lighter(60));
addColor(QColor(Qt::green).lighter(60));
addColor(QColor(Qt::blue).lighter(60));
} else {
addColor(QColor(Qt::red).darker(120));
addColor(QColor(Qt::green).darker(120));
addColor(QColor(Qt::blue).darker(120));
} // light text. get a dark background.
setTabChangesFocus(true);
setFocusPolicy(Qt::StrongFocus);
}
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(completionHighlighted(QString)));
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
#define SKIP_EMPTY Qt::SkipEmptyParts
#else
#define SKIP_EMPTY QString::SkipEmptyParts
#endif
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 qMakePair(start, end);
}
void TagWidget::highlight()
{
removeAllBlocks();
int lastPos = 0;
const auto l = text().split(QChar(','), SKIP_EMPTY);
for (const QString &s: l) {
QString trimmed = s.trimmed();
if (trimmed.isEmpty())
continue;
int start = text().indexOf(trimmed, lastPos);
addBlock(start, trimmed.size() + start);
lastPos = trimmed.size() + start;
}
}
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();
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(const QString &completion)
{
completionHighlighted(completion);
emit textChanged();
}
void TagWidget::completionHighlighted(const QString &completion)
{
QPair<int, int> pos = getCursorTagPosition();
setText(text().remove(pos.first, pos.second - pos.first).insert(pos.first, completion));
setCursorPosition(pos.first + completion.length());
}
void TagWidget::setCursorPosition(int position)
{
blockSignals(true);
GroupedLineEdit::setCursorPosition(position);
blockSignals(false);
}
void TagWidget::setText(const QString &text)
{
blockSignals(true);
GroupedLineEdit::setText(text);
blockSignals(false);
highlight();
}
void TagWidget::clear()
{
blockSignals(true);
GroupedLineEdit::clear();
blockSignals(false);
}
void TagWidget::keyPressEvent(QKeyEvent *e)
{
QPair<int, int> pos;
QAbstractItemView *popup;
bool finishedTag = false;
switch (e->key()) {
case Qt::Key_Escape:
pos = getCursorTagPosition();
if (pos.first >= 0 && pos.second > 0) {
setText(text().remove(pos.first, pos.second - pos.first));
setCursorPosition(pos.first);
}
popup = m_completer->popup();
if (popup)
popup->hide();
return;
case Qt::Key_Return:
case Qt::Key_Enter:
case Qt::Key_Tab:
/*
* Fake the QLineEdit behaviour by simply
* closing the QAbstractViewitem
*/
if (m_completer) {
popup = m_completer->popup();
if (popup)
popup->hide();
}
finishedTag = true;
break;
case Qt::Key_Comma: { /* if this is the last key, and the previous string is empty, ignore the comma. */
QString temp = text();
if (temp.split(QChar(',')).last().trimmed().isEmpty()){
e->ignore();
return;
}
}
}
if (e->key() == Qt::Key_Tab && lastFinishedTag) { // if we already end in comma, go to next/prev field
MainWindow::instance()->mainTab->nextInputField(e); // by sending the key event to the MainTab widget
} else if (e->key() == Qt::Key_Tab || e->key() == Qt::Key_Return) { // otherwise let's pretend this is a comma instead
QKeyEvent fakeEvent(e->type(), Qt::Key_Comma, e->modifiers(), QString(","));
keyPressEvent(&fakeEvent);
} else {
GroupedLineEdit::keyPressEvent(e);
}
lastFinishedTag = finishedTag;
}
void TagWidget::wheelEvent(QWheelEvent *event)
{
if (hasFocus()) {
GroupedLineEdit::wheelEvent(event);
}
}
// Since we capture enter / return / tab, we never send an editingFinished() signal.
// Therefore, override the focusOutEvent()
void TagWidget::focusOutEvent(QFocusEvent *ev)
{
GroupedLineEdit::focusOutEvent(ev);
emit editingFinished();
}
// Implement simple drag and drop: text dropped onto the widget
// will be added as a new tag at the end. This overrides
// Qt's implementation which resulted in weird UI behavior,
// as the user may succeed in scrolling the view port.
static void handleDragEvent(QDragMoveEvent *e)
{
if (e->mimeData()->hasFormat(QStringLiteral("text/plain")))
e->acceptProposedAction();
}
void TagWidget::dragEnterEvent(QDragEnterEvent *e)
{
handleDragEvent(e);
}
void TagWidget::dragMoveEvent(QDragMoveEvent *e)
{
handleDragEvent(e);
}
void TagWidget::dragLeaveEvent(QDragLeaveEvent *)
{
}
void TagWidget::dropEvent(QDropEvent *e)
{
e->acceptProposedAction();
QString newTag = e->mimeData()->text().trimmed();
if (newTag.isEmpty())
return;
QString s = text().trimmed();
if (!s.isEmpty())
s += ", ";
s += newTag;
setText(s);
emit editingFinished();
}
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