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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qquickmnemoniclabel_p.h"
#include <QtQuick/private/qquicktext_p_p.h>
QT_BEGIN_NAMESPACE
QQuickMnemonicLabel::QQuickMnemonicLabel(QQuickItem *parent)
: QQuickText(parent)
{
}
QString QQuickMnemonicLabel::text() const
{
return m_fullText;
}
void QQuickMnemonicLabel::setText(const QString &text)
{
if (m_fullText == text)
return;
m_fullText = text;
updateMnemonic();
}
bool QQuickMnemonicLabel::isMnemonicVisible() const
{
return m_mnemonicVisible;
}
void QQuickMnemonicLabel::setMnemonicVisible(bool visible)
{
if (m_mnemonicVisible == visible)
return;
m_mnemonicVisible = visible;
updateMnemonic();
if (isComponentComplete())
forceLayout();
}
static QTextLayout::FormatRange underlineRange(int start, int length = 1)
{
QTextLayout::FormatRange range;
range.start = start;
range.length = length;
range.format.setFontUnderline(true);
return range;
}
// based on QPlatformTheme::removeMnemonics()
void QQuickMnemonicLabel::updateMnemonic()
{
QString text(m_fullText.size(), QChar::Null);
int idx = 0;
int pos = 0;
int len = m_fullText.size();
QList<QTextLayout::FormatRange> formats;
while (len) {
if (m_fullText.at(pos) == QLatin1Char('&') && (len == 1 || m_fullText.at(pos + 1) != QLatin1Char('&'))) {
if (m_mnemonicVisible && (pos == 0 || m_fullText.at(pos - 1) != QLatin1Char('&')))
formats += underlineRange(pos);
++pos;
--len;
if (len == 0)
break;
} else if (m_fullText.at(pos) == QLatin1Char('(') && len >= 4 &&
m_fullText.at(pos + 1) == QLatin1Char('&') &&
m_fullText.at(pos + 2) != QLatin1Char('&') &&
m_fullText.at(pos + 3) == QLatin1Char(')')) {
// a mnemonic with format "\s*(&X)"
if (m_mnemonicVisible) {
formats += underlineRange(pos + 1);
} else {
int n = 0;
while (idx > n && text.at(idx - n - 1).isSpace())
++n;
idx -= n;
pos += 4;
len -= 4;
continue;
}
}
text[idx] = m_fullText.at(pos);
++pos;
++idx;
--len;
}
text.truncate(idx);
QQuickTextPrivate::get(this)->layout.setFormats(formats);
QQuickText::setText(text);
}
QT_END_NAMESPACE
#include "moc_qquickmnemoniclabel_p.cpp"
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