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// Copyright (C) 2018 Benjamin Balga
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "consolelineedit.h"
#include "serialterminalconstants.h"
#include <QKeyEvent>
namespace SerialTerminal {
namespace Internal {
ConsoleLineEdit::ConsoleLineEdit(QWidget *parent) :
QLineEdit(parent),
m_maxEntries(Constants::DEFAULT_MAX_ENTRIES)
{
connect(this, &QLineEdit::returnPressed, this, &ConsoleLineEdit::addHistoryEntry);
}
// Add current text to history entries, if not empty and different from last entry.
// Called when return key is pressed.
void ConsoleLineEdit::addHistoryEntry()
{
m_currentEntryIndex = 0;
const QString currentText = text();
if (currentText.isEmpty())
return;
if (!m_history.isEmpty() && m_history.first() == currentText)
return;
m_history.prepend(currentText);
if (m_history.size() > m_maxEntries)
m_history.removeLast();
}
// Load a specific history entry: 0 = current, n = n-most last entry
void ConsoleLineEdit::loadHistoryEntry(int entryIndex)
{
if (entryIndex < 0 || entryIndex > m_history.size())
return;
if (m_currentEntryIndex == 0)
m_editingEntry = text();
if (entryIndex <= 0 && m_currentEntryIndex > 0) {
m_currentEntryIndex = 0;
setText(m_editingEntry);
} else if (entryIndex > 0) {
m_currentEntryIndex = entryIndex;
setText(m_history.at(entryIndex-1));
}
}
void ConsoleLineEdit::keyPressEvent(QKeyEvent *event)
{
// Navigate history with up/down keys
if (event->key() == Qt::Key_Up) {
loadHistoryEntry(m_currentEntryIndex+1);
event->accept();
} else if (event->key() == Qt::Key_Down) {
loadHistoryEntry(m_currentEntryIndex-1);
event->accept();
} else {
QLineEdit::keyPressEvent(event);
}
}
} // namespace Internal
} // namespace SerialTerminal
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