1 files changed, 133 insertions, 0 deletions
diff --git a/src/quickcontrols2/qquickmnemoniclabel.cpp b/src/quickcontrols2/qquickmnemoniclabel.cpp
new file mode 100644
index 00000000..9c8e9ab1
--- /dev/null
+++ b/src/quickcontrols2/qquickmnemoniclabel.cpp
@@ -0,0 +1,133 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickmnemoniclabel_p.h"
+
+#include <QtQuick/private/qquicktext_p_p.h>
+
+QT_BEGIN_NAMESPACE
+
+QQuickMnemonicLabel::QQuickMnemonicLabel(QQuickItem *parent)
+    : QQuickText(parent),
+      m_mnemonicVisible(true)
+{
+}
+
+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(), 0);
+    int idx = 0;
+    int pos = 0;
+    int len = m_fullText.length();
+    QVector<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