fix: [Env view] Fixed issues with environment variable view

1.The application crashed while changing the variable name
2.After the variable name is modified, the modified item cannot be locked

Bug: https://pms.uniontech.com/bug-view-255803.html
Log: fix bug

src/common/util/namevaluemodel.cpp

@@ -0,0 +1,199 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "namevaluemodel.h"
+
+class NameValueModelPrivate
+{
+public:
+    int indexOf(const QString &name);
+    int findInsertPosition(const QString &name);
+
+public:
+    QVariantMap itemMap;
+};
+
+int NameValueModelPrivate::indexOf(const QString &name)
+{
+    for (int i = 0; i < itemMap.size(); ++i) {
+        if (itemMap.keys()[i] == name)
+            return i;
+    }
+
+    return -1;
+}
+
+int NameValueModelPrivate::findInsertPosition(const QString &name)
+{
+    auto iter = itemMap.cbegin();
+    int i = 0;
+    for (; iter != itemMap.cend(); ++iter, ++i) {
+        if (iter.key().compare(name, Qt::CaseSensitive) > 0)
+            return i;
+    }
+
+    return itemMap.size();
+}
+
+NameValueModel::NameValueModel(QObject *parent)
+    : QAbstractTableModel(parent),
+      d(new NameValueModelPrivate)
+{
+}
+
+NameValueModel::~NameValueModel()
+{
+    delete d;
+}
+
+int NameValueModel::rowCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+
+    return d->itemMap.size();
+}
+
+int NameValueModel::columnCount(const QModelIndex &parent) const
+{
+    if (parent.isValid())
+        return 0;
+
+    return 2;
+}
+
+QVariant NameValueModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid() || index.row() >= d->itemMap.size())
+        return QVariant();
+
+    auto name = d->itemMap.keys()[index.row()];
+    switch (role) {
+    case Qt::DisplayRole:
+    case Qt::EditRole:
+    case Qt::ToolTipRole:
+        if (index.column() == 0)
+            return name;
+
+        if (index.column() == 1)
+            return d->itemMap.value(name);
+        break;
+    }
+    return QVariant();
+}
+
+bool NameValueModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+    if (!index.isValid() || role != Qt::EditRole)
+        return false;
+
+    // ignore changes to already set values:
+    if (data(index, role) == value)
+        return true;
+
+    const QString oldName = data(this->index(index.row(), 0, QModelIndex())).toString();
+    const QString oldValue = data(this->index(index.row(), 1, QModelIndex()), Qt::EditRole).toString();
+    if (index.column() == 0) {
+        //fail if a variable with the same name already exists
+        const QString &newName = value.toString();
+        if (newName.isEmpty() || newName.contains('='))
+            return false;
+        // Does the new name exist already?
+        if (d->itemMap.contains(newName) || newName.isEmpty())
+            return false;
+
+        removeItem(index);
+        QModelIndex newIndex = addItem(newName, oldValue);   // add the new variable
+        emit focusIndex(newIndex);   // hint to focus on the name
+        return true;
+    } else if (index.column() == 1) {
+        d->itemMap[oldName] = value;
+        emit dataChanged(index, index);
+        return true;
+    }
+    return false;
+}
+
+Qt::ItemFlags NameValueModel::flags(const QModelIndex &index) const
+{
+    Q_UNUSED(index)
+    return Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled;
+}
+
+QVariant NameValueModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if (orientation == Qt::Vertical || role != Qt::DisplayRole)
+        return QVariant();
+    return section == 0 ? tr("Variable") : tr("Value");
+}
+
+void NameValueModel::setItems(const QVariantMap &items)
+{
+    beginResetModel();
+    d->itemMap = items;
+    endResetModel();
+}
+
+QVariantMap NameValueModel::items() const
+{
+    return d->itemMap;
+}
+
+QModelIndex NameValueModel::addItem()
+{
+    return addItem(tr("<VARIABLE>"), tr("<VALUE>"));
+}
+
+QModelIndex NameValueModel::addItem(const QString &name, const QVariant &value)
+{
+    int pos = d->indexOf(name);
+    if (pos >= 0 && pos < d->itemMap.size())
+        return index(pos, 0, QModelIndex());
+
+    int insertPos = d->findInsertPosition(name);
+    beginInsertRows(QModelIndex(), insertPos, insertPos);
+    d->itemMap.insert(name, value);
+    endInsertRows();
+
+    return index(insertPos, 0, QModelIndex());
+}
+
+void NameValueModel::removeItem(const QModelIndex &index)
+{
+    auto name = data(this->index(index.row(), 0, QModelIndex())).toString();
+    removeItem(name);
+}
+
+void NameValueModel::removeItem(const QString &variable)
+{
+    int pos = d->indexOf(variable);
+    if (pos < 0)
+        return;
+
+    beginRemoveRows(QModelIndex(), pos, pos);
+    d->itemMap.remove(variable);
+    endRemoveRows();
+}
+
+void NameValueModel::clear()
+{
+    beginResetModel();
+    d->itemMap.clear();
+    endResetModel();
+}
+
+QString NameValueModel::variableFromIndex(const QModelIndex &index) const
+{
+    auto it = std::next(d->itemMap.cbegin(), index.row());
+    return it.key();
+}
+
+QModelIndex NameValueModel::indexFromVariable(const QString &name) const
+{
+    int pos = d->indexOf(name);
+    if (pos == -1)
+        return {};
+
+    return index(pos, 0);
+}

src/common/util/namevaluemodel.h

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NAMEVALUEMODEL_H
+#define NAMEVALUEMODEL_H
+
+#include <QAbstractTableModel>
+
+class NameValueModelPrivate;
+class NameValueModel : public QAbstractTableModel
+{
+    Q_OBJECT
+public:
+    explicit NameValueModel(QObject *parent = nullptr);
+    ~NameValueModel() override;
+
+    int rowCount(const QModelIndex &parent) const override;
+    int columnCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+    QVariant headerData(int section,
+                        Qt::Orientation orientation,
+                        int role = Qt::DisplayRole) const override;
+
+    void setItems(const QVariantMap &items);
+    QVariantMap items() const;
+    QModelIndex addItem();
+    QModelIndex addItem(const QString &name, const QVariant &value);
+    void removeItem(const QModelIndex &index);
+    void removeItem(const QString &variable);
+    void clear();
+
+    QString variableFromIndex(const QModelIndex &index) const;
+    QModelIndex indexFromVariable(const QString &name) const;
+
+signals:
+    void focusIndex(const QModelIndex &index);
+
+private:
+    NameValueModelPrivate *const d;
+};
+
+#endif   // NAMEVALUEMODEL_H