File indexing completed on 2024-04-14 03:54:01

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2003 Scott Wheeler <wheeler@kde.org>
     SPDX-FileCopyrightText: 2004 Gustavo Sverzut Barbieri <gsbarbieri@users.sourceforge.net>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "klistwidgetsearchline.h"
 
 #include <QApplication>
 #include <QEvent>
 #include <QKeyEvent>
 #include <QListWidget>
 #include <QTimer>
 
 class KListWidgetSearchLinePrivate
 {
 public:
     KListWidgetSearchLinePrivate(KListWidgetSearchLine *parent)
         : q(parent)
     {
     }
 
     void _k_listWidgetDeleted();
     void _k_queueSearch(const QString &);
     void _k_activateSearch();
     void _k_rowsInserted(const QModelIndex &, int, int);
     void _k_dataChanged(const QModelIndex &, const QModelIndex &);
 
     void init(QListWidget *listWidget = nullptr);
     void updateHiddenState(int start, int end);
 
     KListWidgetSearchLine *const q;
     QListWidget *listWidget = nullptr;
     Qt::CaseSensitivity caseSensitivity = Qt::CaseInsensitive;
     bool activeSearch = false;
     QString search;
     int queuedSearches = 0;
 };
 
 /******************************************************************************
  * Public Methods                                                             *
  *****************************************************************************/
 KListWidgetSearchLine::KListWidgetSearchLine(QWidget *parent, QListWidget *listWidget)
     : QLineEdit(parent)
     , d(new KListWidgetSearchLinePrivate(this))
 
 {
     d->init(listWidget);
 }
 
 KListWidgetSearchLine::~KListWidgetSearchLine()
 {
     clear(); // returning items back to listWidget
 }
 
 Qt::CaseSensitivity KListWidgetSearchLine::caseSensitive() const
 {
     return d->caseSensitivity;
 }
 
 QListWidget *KListWidgetSearchLine::listWidget() const
 {
     return d->listWidget;
 }
 
 /******************************************************************************
  * Public Slots                                                               *
  *****************************************************************************/
 void KListWidgetSearchLine::updateSearch(const QString &s)
 {
     d->search = s.isNull() ? text() : s;
     if (d->listWidget) {
         d->updateHiddenState(0, d->listWidget->count() - 1);
     }
 }
 
 void KListWidgetSearchLine::clear()
 {
     // Show items back to QListWidget
     if (d->listWidget != nullptr) {
         for (int i = 0; i < d->listWidget->count(); ++i) {
             d->listWidget->item(i)->setHidden(false);
         }
     }
 
     d->search = QString();
     d->queuedSearches = 0;
     QLineEdit::clear();
 }
 
 void KListWidgetSearchLine::setCaseSensitivity(Qt::CaseSensitivity cs)
 {
     d->caseSensitivity = cs;
 }
 
 void KListWidgetSearchLine::setListWidget(QListWidget *lw)
 {
     if (d->listWidget != nullptr) {
         disconnect(d->listWidget, SIGNAL(destroyed()), this, SLOT(_k_listWidgetDeleted()));
         d->listWidget->model()->disconnect(this);
     }
 
     d->listWidget = lw;
 
     if (lw != nullptr) {
         // clang-format off
         connect(d->listWidget, SIGNAL(destroyed()), this, SLOT(_k_listWidgetDeleted()));
         connect(d->listWidget->model(), SIGNAL(rowsInserted(QModelIndex,int,int)), this, SLOT(_k_rowsInserted(QModelIndex,int,int)));
         connect(d->listWidget->model(), SIGNAL(dataChanged(QModelIndex,QModelIndex)), this, SLOT(_k_dataChanged(QModelIndex,QModelIndex)));
         // clang-format on
         setEnabled(true);
     } else {
         setEnabled(false);
     }
 }
 
 /******************************************************************************
  * Protected Methods                                                          *
  *****************************************************************************/
 bool KListWidgetSearchLine::itemMatches(const QListWidgetItem *item, const QString &s) const
 {
     if (s.isEmpty()) {
         return true;
     }
 
     if (item == nullptr) {
         return false;
     }
 
     return (item->text().indexOf(s, 0, caseSensitive() ? Qt::CaseSensitive : Qt::CaseInsensitive) >= 0);
 }
 
 void KListWidgetSearchLinePrivate::init(QListWidget *_listWidget)
 {
     listWidget = _listWidget;
 
     QObject::connect(q, SIGNAL(textChanged(QString)), q, SLOT(_k_queueSearch(QString)));
 
     if (listWidget != nullptr) {
         // clang-format off
         QObject::connect(listWidget, SIGNAL(destroyed()), q, SLOT(_k_listWidgetDeleted()));
         QObject::connect(listWidget->model(), SIGNAL(rowsInserted(QModelIndex,int,int)), q, SLOT(_k_rowsInserted(QModelIndex,int,int)));
         QObject::connect(listWidget->model(), SIGNAL(dataChanged(QModelIndex,QModelIndex)), q, SLOT(_k_dataChanged(QModelIndex,QModelIndex)));
         // clang-format on
         q->setEnabled(true);
     } else {
         q->setEnabled(false);
     }
     q->setClearButtonEnabled(true);
 }
 
 void KListWidgetSearchLinePrivate::updateHiddenState(int start, int end)
 {
     if (!listWidget) {
         return;
     }
 
     QListWidgetItem *currentItem = listWidget->currentItem();
 
     // Remove Non-Matching items
     for (int index = start; index <= end; ++index) {
         QListWidgetItem *item = listWidget->item(index);
         if (!q->itemMatches(item, search)) {
             item->setHidden(true);
 
             if (item == currentItem) {
                 currentItem = nullptr; // It's not in listWidget anymore.
             }
         } else if (item->isHidden()) {
             item->setHidden(false);
         }
     }
 
     if (listWidget->isSortingEnabled()) {
         listWidget->sortItems();
     }
 
     if (currentItem != nullptr) {
         listWidget->scrollToItem(currentItem);
     }
 }
 
 bool KListWidgetSearchLine::event(QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
         if (keyEvent->matches(QKeySequence::MoveToNextLine) || keyEvent->matches(QKeySequence::SelectNextLine)
             || keyEvent->matches(QKeySequence::MoveToPreviousLine) || keyEvent->matches(QKeySequence::SelectPreviousLine)
             || keyEvent->matches(QKeySequence::MoveToNextPage) || keyEvent->matches(QKeySequence::SelectNextPage)
             || keyEvent->matches(QKeySequence::MoveToPreviousPage) || keyEvent->matches(QKeySequence::SelectPreviousPage)) {
             if (d->listWidget) {
                 QApplication::sendEvent(d->listWidget, event);
                 return true;
             }
         } else if (keyEvent->key() == Qt::Key_Enter || keyEvent->key() == Qt::Key_Return) {
             if (d->listWidget) {
                 QApplication::sendEvent(d->listWidget, event);
                 return true;
             }
         }
     }
     return QLineEdit::event(event);
 }
 /******************************************************************************
  * Protected Slots                                                            *
  *****************************************************************************/
 void KListWidgetSearchLinePrivate::_k_queueSearch(const QString &s)
 {
     queuedSearches++;
     search = s;
     QTimer::singleShot(200, q, SLOT(_k_activateSearch()));
 }
 
 void KListWidgetSearchLinePrivate::_k_activateSearch()
 {
     queuedSearches--;
 
     if (queuedSearches <= 0) {
         q->updateSearch(search);
         queuedSearches = 0;
     }
 }
 
 /******************************************************************************
  * KListWidgetSearchLinePrivate Slots                                                              *
  *****************************************************************************/
 void KListWidgetSearchLinePrivate::_k_listWidgetDeleted()
 {
     listWidget = nullptr;
     q->setEnabled(false);
 }
 
 void KListWidgetSearchLinePrivate::_k_rowsInserted(const QModelIndex &parent, int start, int end)
 {
     if (parent.isValid()) {
         return;
     }
 
     updateHiddenState(start, end);
 }
 
 void KListWidgetSearchLinePrivate::_k_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
 {
     if (topLeft.parent().isValid()) {
         return;
     }
 
     updateHiddenState(topLeft.row(), bottomRight.row());
 }
 
 #include "moc_klistwidgetsearchline.cpp"