| 1 | // Copyright (C) 2017 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qquickmnemoniclabel_p.h" |
| 5 | |
| 6 | #include <QtQuick/private/qquicktext_p_p.h> |
| 7 | |
| 8 | QT_BEGIN_NAMESPACE |
| 9 | |
| 10 | QQuickMnemonicLabel::QQuickMnemonicLabel(QQuickItem *parent) |
| 11 | : QQuickText(parent) |
| 12 | { |
| 13 | } |
| 14 | |
| 15 | QString QQuickMnemonicLabel::text() const |
| 16 | { |
| 17 | return m_fullText; |
| 18 | } |
| 19 | |
| 20 | void QQuickMnemonicLabel::setText(const QString &text) |
| 21 | { |
| 22 | if (m_fullText == text) |
| 23 | return; |
| 24 | |
| 25 | m_fullText = text; |
| 26 | updateMnemonic(); |
| 27 | } |
| 28 | |
| 29 | bool QQuickMnemonicLabel::isMnemonicVisible() const |
| 30 | { |
| 31 | return m_mnemonicVisible; |
| 32 | } |
| 33 | |
| 34 | void QQuickMnemonicLabel::setMnemonicVisible(bool visible) |
| 35 | { |
| 36 | if (m_mnemonicVisible == visible) |
| 37 | return; |
| 38 | |
| 39 | m_mnemonicVisible = visible; |
| 40 | updateMnemonic(); |
| 41 | |
| 42 | if (isComponentComplete()) |
| 43 | forceLayout(); |
| 44 | } |
| 45 | |
| 46 | static QTextLayout::FormatRange underlineRange(int start, int length = 1) |
| 47 | { |
| 48 | QTextLayout::FormatRange range; |
| 49 | range.start = start; |
| 50 | range.length = length; |
| 51 | range.format.setFontUnderline(true); |
| 52 | return range; |
| 53 | } |
| 54 | |
| 55 | // based on QPlatformTheme::removeMnemonics() |
| 56 | void QQuickMnemonicLabel::updateMnemonic() |
| 57 | { |
| 58 | QString text(m_fullText.size(), QChar::Null); |
| 59 | int idx = 0; |
| 60 | int pos = 0; |
| 61 | int len = m_fullText.size(); |
| 62 | QList<QTextLayout::FormatRange> formats; |
| 63 | while (len) { |
| 64 | if (m_fullText.at(i: pos) == QLatin1Char('&') && (len == 1 || m_fullText.at(i: pos + 1) != QLatin1Char('&'))) { |
| 65 | if (m_mnemonicVisible && (pos == 0 || m_fullText.at(i: pos - 1) != QLatin1Char('&'))) |
| 66 | formats += underlineRange(start: pos); |
| 67 | ++pos; |
| 68 | --len; |
| 69 | if (len == 0) |
| 70 | break; |
| 71 | } else if (m_fullText.at(i: pos) == QLatin1Char('(') && len >= 4 && |
| 72 | m_fullText.at(i: pos + 1) == QLatin1Char('&') && |
| 73 | m_fullText.at(i: pos + 2) != QLatin1Char('&') && |
| 74 | m_fullText.at(i: pos + 3) == QLatin1Char(')')) { |
| 75 | // a mnemonic with format "\s*(&X)" |
| 76 | if (m_mnemonicVisible) { |
| 77 | formats += underlineRange(start: pos + 1); |
| 78 | } else { |
| 79 | int n = 0; |
| 80 | while (idx > n && text.at(i: idx - n - 1).isSpace()) |
| 81 | ++n; |
| 82 | idx -= n; |
| 83 | pos += 4; |
| 84 | len -= 4; |
| 85 | continue; |
| 86 | } |
| 87 | } |
| 88 | text[idx] = m_fullText.at(i: pos); |
| 89 | ++pos; |
| 90 | ++idx; |
| 91 | --len; |
| 92 | } |
| 93 | text.truncate(pos: idx); |
| 94 | |
| 95 | QQuickTextPrivate::get(t: this)->layout.setFormats(formats); |
| 96 | QQuickText::setText(text); |
| 97 | } |
| 98 | |
| 99 | QT_END_NAMESPACE |
| 100 | |
| 101 | #include "moc_qquickmnemoniclabel_p.cpp" |
| 102 |