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-rw-r--r--src/qml/jsapi/qjslist.cpp18
-rw-r--r--src/qml/jsapi/qjslist.h282
2 files changed, 300 insertions, 0 deletions
diff --git a/src/qml/jsapi/qjslist.cpp b/src/qml/jsapi/qjslist.cpp
new file mode 100644
index 0000000000..b3a4eed3c0
--- /dev/null
+++ b/src/qml/jsapi/qjslist.cpp
@@ -0,0 +1,18 @@
+// Copyright (C) 2023 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 <QtQml/qjslist.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ * \class QJSListIndexClamp
+ * \internal
+ */
+
+/*!
+ * \class QJSList
+ * \internal
+ */
+
+QT_END_NAMESPACE
diff --git a/src/qml/jsapi/qjslist.h b/src/qml/jsapi/qjslist.h
new file mode 100644
index 0000000000..cff8ccc203
--- /dev/null
+++ b/src/qml/jsapi/qjslist.h
@@ -0,0 +1,282 @@
+// Copyright (C) 2023 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
+
+#ifndef QJSLIST_H
+#define QJSLIST_H
+
+#include <QtQml/qtqmlglobal.h>
+#include <QtQml/qqmllist.h>
+#include <QtQml/qjsengine.h>
+#include <QtCore/qobject.h>
+#include <QtCore/qstring.h>
+
+#include <algorithm>
+
+QT_BEGIN_NAMESPACE
+
+struct QJSListIndexClamp
+{
+ static qsizetype clamp(int start, qsizetype max, qsizetype min = 0)
+ {
+ Q_ASSERT(min >= 0);
+ Q_ASSERT(min <= max);
+ return std::clamp(start < 0 ? max + qsizetype(start) : qsizetype(start), min, max);
+ }
+};
+
+template<typename List, typename Value = typename List::value_type>
+struct QJSList : private QJSListIndexClamp
+{
+ Q_DISABLE_COPY_MOVE(QJSList)
+
+ QJSList(List *list, QJSEngine *engine) : m_list(list), m_engine(engine) {}
+
+ bool includes(const Value &value) const
+ {
+ return std::find(m_list->cbegin(), m_list->cend(), value) != m_list->cend();
+ }
+
+ bool includes(const Value &value, int start) const
+ {
+ return std::find(m_list->cbegin() + clamp(start, m_list->size()), m_list->cend(), value)
+ != m_list->cend();
+ }
+
+ QString join(const QString &separator = QStringLiteral(",")) const
+ {
+ QString result;
+ bool atBegin = true;
+ std::for_each(m_list->cbegin(), m_list->cend(), [&](const Value &value) {
+ if (atBegin)
+ atBegin = false;
+ else
+ result += separator;
+ result += m_engine->coerceValue<Value, QString>(value);
+ });
+ return result;
+ }
+
+ List slice() const
+ {
+ return *m_list;
+ }
+ List slice(int start) const
+ {
+ List result;
+ std::copy(m_list->cbegin() + clamp(start, m_list->size()), m_list->cend(),
+ std::back_inserter(result));
+ return result;
+ }
+ List slice(int start, int end) const
+ {
+ const qsizetype size = m_list->size();
+ const qsizetype clampedStart = clamp(start, size);
+ const qsizetype clampedEnd = clamp(end, size, clampedStart);
+
+ List result;
+ std::copy(m_list->cbegin() + clampedStart, m_list->cbegin() + clampedEnd,
+ std::back_inserter(result));
+ return result;
+ }
+
+ int indexOf(const Value &value) const
+ {
+ const auto begin = m_list->cbegin();
+ const auto end = m_list->cend();
+ const auto it = std::find(begin, end, value);
+ if (it == end)
+ return -1;
+ const qsizetype result = it - begin;
+ Q_ASSERT(result >= 0);
+ return result > std::numeric_limits<int>::max() ? -1 : int(result);
+ }
+ int indexOf(const Value &value, int start) const
+ {
+ const auto begin = m_list->cbegin();
+ const auto end = m_list->cend();
+ const auto it = std::find(begin + clamp(start, m_list->size()), end, value);
+ if (it == end)
+ return -1;
+ const qsizetype result = it - begin;
+ Q_ASSERT(result >= 0);
+ return result > std::numeric_limits<int>::max() ? -1 : int(result);
+ }
+
+ int lastIndexOf(const Value &value) const
+ {
+ const auto begin = std::make_reverse_iterator(m_list->cend());
+ const auto end = std::make_reverse_iterator(m_list->cbegin());
+ const auto it = std::find(begin, end, value);
+ const qsizetype result = (end - it) - 1;
+ return result > std::numeric_limits<int>::max() ? -1 : int(result);
+ }
+ int lastIndexOf(const Value &value, int start) const
+ {
+ const qsizetype size = m_list->size();
+ if (size == 0)
+ return -1;
+
+ // Construct a one-past-end iterator as input.
+ const qsizetype clampedStart = std::min(clamp(start, size), size - 1);
+ const auto begin = std::make_reverse_iterator(m_list->cbegin() + clampedStart + 1);
+
+ const auto end = std::make_reverse_iterator(m_list->cbegin());
+ const auto it = std::find(begin, end, value);
+ const qsizetype result = (end - it) - 1;
+ return result > std::numeric_limits<int>::max() ? -1 : int(result);
+ }
+
+ QString toString() const { return join(); }
+
+private:
+ List *m_list = nullptr;
+ QJSEngine *m_engine = nullptr;
+};
+
+template<>
+struct QJSList<QQmlListProperty<QObject>, QObject *> : private QJSListIndexClamp
+{
+ Q_DISABLE_COPY_MOVE(QJSList)
+
+ QJSList(QQmlListProperty<QObject> *list, QJSEngine *engine) : m_list(list), m_engine(engine) {}
+
+ bool includes(const QObject *value) const
+ {
+ if (!m_list->count || !m_list->at)
+ return false;
+
+ const qsizetype size = m_list->count(m_list);
+ for (qsizetype i = 0; i < size; ++i) {
+ if (m_list->at(m_list, i) == value)
+ return true;
+ }
+
+ return false;
+ }
+ bool includes(const QObject *value, int start) const
+ {
+ if (!m_list->count || !m_list->at)
+ return false;
+
+ const qsizetype size = m_list->count(m_list);
+ for (qsizetype i = clamp(start, size); i < size; ++i) {
+ if (m_list->at(m_list, i) == value)
+ return true;
+ }
+
+ return false;
+ }
+
+ QString join(const QString &separator = QStringLiteral(",")) const
+ {
+ if (!m_list->count || !m_list->at)
+ return QString();
+
+ QString result;
+ for (qsizetype i = 0, end = m_list->count(m_list); i < end; ++i) {
+ if (i != 0)
+ result += separator;
+ result += m_engine->coerceValue<QObject *, QString>(m_list->at(m_list, i));
+ }
+
+ return result;
+ }
+
+ QObjectList slice() const
+ {
+ return m_list->toList<QObjectList>();
+ }
+ QObjectList slice(int start) const
+ {
+ if (!m_list->count || !m_list->at)
+ return QObjectList();
+
+ const qsizetype size = m_list->count(m_list);
+ const qsizetype clampedStart = clamp(start, size);
+ QObjectList result;
+ result.reserve(size - clampedStart);
+ for (qsizetype i = clampedStart; i < size; ++i)
+ result.append(m_list->at(m_list, i));
+ return result;
+ }
+ QObjectList slice(int start, int end) const
+ {
+ if (!m_list->count || !m_list->at)
+ return QObjectList();
+
+ const qsizetype size = m_list->count(m_list);
+ const qsizetype clampedStart = clamp(start, size);
+ const qsizetype clampedEnd = clamp(end, size, clampedStart);
+ QObjectList result;
+ result.reserve(clampedEnd - clampedStart);
+ for (qsizetype i = clampedStart; i < clampedEnd; ++i)
+ result.append(m_list->at(m_list, i));
+ return result;
+ }
+
+ int indexOf(const QObject *value) const
+ {
+ if (!m_list->count || !m_list->at)
+ return -1;
+
+ const qsizetype end
+ = std::min(m_list->count(m_list), qsizetype(std::numeric_limits<int>::max()));
+ for (qsizetype i = 0; i < end; ++i) {
+ if (m_list->at(m_list, i) == value)
+ return int(i);
+ }
+ return -1;
+ }
+ int indexOf(const QObject *value, int start) const
+ {
+ if (!m_list->count || !m_list->at)
+ return -1;
+
+ const qsizetype size = m_list->count(m_list);
+ for (qsizetype i = clamp(start, size),
+ end = std::min(size, qsizetype(std::numeric_limits<int>::max()));
+ i < end; ++i) {
+ if (m_list->at(m_list, i) == value)
+ return int(i);
+ }
+ return -1;
+ }
+
+ int lastIndexOf(const QObject *value) const
+ {
+ if (!m_list->count || !m_list->at)
+ return -1;
+
+ for (qsizetype i = m_list->count(m_list) - 1; i >= 0; --i) {
+ if (m_list->at(m_list, i) == value)
+ return i > std::numeric_limits<int>::max() ? -1 : int(i);
+ }
+ return -1;
+ }
+ int lastIndexOf(const QObject *value, int start) const
+ {
+ if (!m_list->count || !m_list->at)
+ return -1;
+
+ const qsizetype size = m_list->count(m_list);
+ if (size == 0)
+ return -1;
+
+ qsizetype clampedStart = std::min(clamp(start, size), size - 1);
+ for (qsizetype i = clampedStart; i >= 0; --i) {
+ if (m_list->at(m_list, i) == value)
+ return i > std::numeric_limits<int>::max() ? -1 : int(i);
+ }
+ return -1;
+ }
+
+ QString toString() const { return join(); }
+
+private:
+ QQmlListProperty<QObject> *m_list = nullptr;
+ QJSEngine *m_engine = nullptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QJSLIST_H
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