File indexing completed on 2024-05-19 05:48:09

 /*
  * SPDX-FileCopyrightText: 2011 Tirtha Chatterjee <tirtha.p.chatterjee@gmail.com>
  *
  * Based on the Itemviews NG project from Trolltech Labs
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kitemlistkeyboardsearchmanager.h"
 
 KItemListKeyboardSearchManager::KItemListKeyboardSearchManager(QObject *parent)
     : QObject(parent)
     , m_isSearchRestarted(false)
     , m_timeout(1000)
 {
     m_keyboardInputTime.invalidate();
 }
 
 KItemListKeyboardSearchManager::~KItemListKeyboardSearchManager()
 {
 }
 
 bool KItemListKeyboardSearchManager::shouldClearSearchIfInputTimeReached()
 {
     const bool keyboardTimeWasValid = m_keyboardInputTime.isValid();
     const qint64 keyboardInputTimeElapsed = m_keyboardInputTime.restart();
     return (keyboardInputTimeElapsed > m_timeout) || !keyboardTimeWasValid;
 }
 
 bool KItemListKeyboardSearchManager::isSearchAsYouTypeActive() const
 {
     return !m_searchedString.isEmpty() && !m_keyboardInputTime.hasExpired(m_timeout);
 }
 
 void KItemListKeyboardSearchManager::addKeys(const QString &keys)
 {
     if (shouldClearSearchIfInputTimeReached()) {
         m_searchedString.clear();
     }
 
     const bool newSearch = m_searchedString.isEmpty();
 
     // Do not start a new search if the user pressed Space. Only add
     // it to the search string if a search is in progress already.
     if (newSearch && keys == QLatin1Char(' ')) {
         return;
     }
 
     if (!keys.isEmpty()) {
         m_searchedString.append(keys);
 
         // Special case:
         // If the same key is pressed repeatedly, the next item matching that key should be highlighted
         const QChar firstKey = m_searchedString.length() > 0 ? m_searchedString.at(0) : QChar();
         const bool sameKey = m_searchedString.length() > 1 && m_searchedString.count(firstKey) == m_searchedString.length();
 
         // Searching for a matching item should start from the next item if either
         // 1. a new search is started and a search has not been restarted or
         // 2. a 'repeated key' search is done.
         const bool searchFromNextItem = (!m_isSearchRestarted && newSearch) || sameKey;
 
         // to remember not to searchFromNextItem if selection was deselected
         // losing keyboard search context basically
         m_isSearchRestarted = false;
 
         Q_EMIT changeCurrentItem(sameKey ? firstKey : m_searchedString, searchFromNextItem);
     }
     m_keyboardInputTime.start();
 }
 
 void KItemListKeyboardSearchManager::setTimeout(qint64 milliseconds)
 {
     m_timeout = milliseconds;
 }
 
 qint64 KItemListKeyboardSearchManager::timeout() const
 {
     return m_timeout;
 }
 
 void KItemListKeyboardSearchManager::cancelSearch()
 {
     m_isSearchRestarted = true;
     m_searchedString.clear();
 }
 
 void KItemListKeyboardSearchManager::slotCurrentChanged(int current, int previous)
 {
     Q_UNUSED(previous)
 
     if (current < 0) {
         // The current item has been removed. We should cancel the search.
         cancelSearch();
     }
 }
 
 void KItemListKeyboardSearchManager::slotSelectionChanged(const KItemSet &current, const KItemSet &previous)
 {
     if (!previous.isEmpty() && current.isEmpty() && previous.count() > 0 && current.count() == 0) {
         // The selection has been emptied. We should cancel the search.
         cancelSearch();
     }
 }
 
 #include "moc_kitemlistkeyboardsearchmanager.cpp"