qt-creator/src/plugins/qmldesigner/components/connectioneditor/dynamicpropertiesmodel.cpp

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "dynamicpropertiesmodel.h"

#include "bindingproperty.h"
#include "nodeabstractproperty.h"
#include "nodemetainfo.h"
#include "qmlchangeset.h"
#include "qmldesignerconstants.h"
#include "qmldesignerplugin.h"
#include "qmlobjectnode.h"
#include "qmltimeline.h"
#include "rewritertransaction.h"
#include "rewritingexception.h"
#include "variantproperty.h"

#include <utils/algorithm.h>
#include <utils/qtcassert.h>

#include <QMessageBox>
#include <QTimer>

namespace {

bool compareVariantProperties(const QmlDesigner::VariantProperty &variantProp1,
                              const QmlDesigner::VariantProperty &variantProp2)
{
    if (variantProp1.parentModelNode() != variantProp2.parentModelNode())
        return false;
    if (variantProp1.name() != variantProp2.name())
        return false;
    return true;
}

QString idOrTypeNameForNode(const QmlDesigner::ModelNode &modelNode)
{
    QString idLabel = modelNode.id();
    if (idLabel.isEmpty())
        idLabel = modelNode.simplifiedTypeName();

    return idLabel;
}

QVariant convertVariantForTypeName(const QVariant &variant, const QmlDesigner::TypeName &typeName)
{
    QVariant returnValue = variant;

    if (typeName == "int") {
        bool ok;
        returnValue = variant.toInt(&ok);
        if (!ok)
            returnValue = 0;
    } else if (typeName == "real") {
        bool ok;
        returnValue = variant.toReal(&ok);
        if (!ok)
            returnValue = 0.0;

    } else if (typeName == "string") {
        returnValue = variant.toString();

    } else if (typeName == "bool") {
        returnValue = variant.toBool();
    } else if (typeName == "url") {
        returnValue = variant.toUrl();
    } else if (typeName == "color") {
        if (QColor::isValidColor(variant.toString())) {
            returnValue = variant.toString();
        } else {
            returnValue = QColor(Qt::black);
        }
    } else if (typeName == "vector2d") {
        returnValue = "Qt.vector2d(0, 0)";
    } else if (typeName == "vector3d") {
        returnValue = "Qt.vector3d(0, 0, 0)";
    } else if (typeName == "vector4d") {
        returnValue = "Qt.vector4d(0, 0, 0 ,0)";
    } else if (typeName == "TextureInput") {
        returnValue = "null";
    } else if (typeName == "alias") {
        returnValue = "null";
    } else if (typeName == "Item") {
        returnValue = "null";
    }

    return returnValue;
}

} // namespace

namespace QmlDesigner {

PropertyName DynamicPropertiesModel::unusedProperty(const ModelNode &modelNode)
{
    PropertyName propertyName = "property";
    int i = 0;
    if (modelNode.isValid() && modelNode.metaInfo().isValid()) {
        while (true) {
            const PropertyName currentPropertyName = propertyName + QString::number(i++).toLatin1();
            if (!modelNode.hasProperty(currentPropertyName) && !modelNode.metaInfo().hasProperty(currentPropertyName))
                return currentPropertyName;
        }
    }

    return propertyName;
}

bool DynamicPropertiesModel::isValueType(const TypeName &type)
{
    // "variant" is considered value type as it is initialized as one.
    // This may need to change if we provide any kind of proper editor for it.
    static const QSet<TypeName> valueTypes {"int", "real", "color", "string", "bool", "url", "variant"};
    return valueTypes.contains(type);
}

QVariant DynamicPropertiesModel::defaultValueForType(const TypeName &type)
{
    QVariant value;
    if (type == "int")
        value = 0;
    else if (type == "real")
        value = 0.0;
    else if (type == "color")
        value = QColor(255, 255, 255);
    else if (type == "string")
        value = "This is a string";
    else if (type == "bool")
        value = false;
    else if (type == "url")
        value = "";
    else if (type == "variant")
        value = "";

    return value;
}

QString DynamicPropertiesModel::defaultExpressionForType(const TypeName &type)
{
    QString expression;
    if (type == "alias")
        expression = "null";
    else if (type == "TextureInput")
        expression = "null";
    else if (type == "vector2d")
        expression = "Qt.vector2d(0, 0)";
    else if (type == "vector3d")
        expression = "Qt.vector3d(0, 0, 0)";
    else if (type == "vector4d")
        expression = "Qt.vector4d(0, 0, 0 ,0)";

    return expression;
}

void DynamicPropertiesModel::add()
{
    addDynamicPropertyForCurrentNode();
}

void DynamicPropertiesModel::remove(int row)
{
    deleteDynamicPropertyByRow(row);
}

int DynamicPropertiesModel::currentIndex() const
{
    return m_currentIndex;
}

void DynamicPropertiesModel::setCurrentIndex(int i)
{
    if (m_currentIndex == i)
        return;

    m_currentIndex = i;

    emit currentIndexChanged();
}

DynamicPropertiesModel::DynamicPropertiesModel(bool explicitSelection, AbstractView *parent)
    : QStandardItemModel(parent), m_view(parent), m_explicitSelection(explicitSelection),
      m_delegate(new DynamicPropertiesModelBackendDelegate(this))
{
    connect(this, &QStandardItemModel::dataChanged, this, &DynamicPropertiesModel::handleDataChanged);
}

void DynamicPropertiesModel::resetModel()
{
    beginResetModel();
    const int backIndex = m_currentIndex;
    clear();
    setHorizontalHeaderLabels({tr("Item"), tr("Property"), tr("Property Type"), tr("Property Value")});

    if (m_view->isAttached()) {
        const auto nodes = selectedNodes();
        for (const ModelNode &modelNode : nodes)
            addModelNode(modelNode);
    }

    emit currentIndexChanged();
    endResetModel();
    m_currentIndex = backIndex;
}


// Method creates dynamic BindingProperty with the same name and type as old VariantProperty
// Value copying is optional
BindingProperty DynamicPropertiesModel::replaceVariantWithBinding(const PropertyName &name, bool copyValue)
{
    if (selectedNodes().size() == 1) {
        const ModelNode modelNode = selectedNodes().constFirst();
        if (modelNode.isValid()) {
            if (modelNode.hasVariantProperty(name)) {
                try {
                    VariantProperty vprop = modelNode.variantProperty(name);
                    TypeName oldType = vprop.dynamicTypeName();
                    QVariant oldValue = vprop.value();

                    modelNode.removeProperty(name);

                    BindingProperty bprop = modelNode.bindingProperty(name);
                    if (bprop.isValid()) {
                        if (copyValue)
                            bprop.setDynamicTypeNameAndExpression(oldType, oldValue.toString());
                        return bprop;
                    }
                } catch (RewritingException &e) {
                    m_exceptionError = e.description();
                    QTimer::singleShot(200, this, &DynamicPropertiesModel::handleException);
                }
            }
        }
    } else {
        qWarning() << "DynamicPropertiesModel::replaceVariantWithBinding: no selected nodes";
    }

    return {};
}

// Finds selected property, and changes it to empty value (QVariant())
// If it's a BindingProperty, then replaces it with empty VariantProperty
void DynamicPropertiesModel::resetProperty(const PropertyName &name)
{
    if (selectedNodes().size() == 1) {
        const ModelNode modelNode = selectedNodes().constFirst();
        if (modelNode.isValid()) {
            if (modelNode.hasProperty(name)) {
                try {
                    AbstractProperty abProp = modelNode.property(name);

                    if (abProp.isVariantProperty()) {
                        VariantProperty property = abProp.toVariantProperty();
                        QVariant newValue = convertVariantForTypeName({}, property.dynamicTypeName());
                        property.setDynamicTypeNameAndValue(property.dynamicTypeName(),
                                                            newValue);
                    } else if (abProp.isBindingProperty()) {
                        BindingProperty property = abProp.toBindingProperty();
                        TypeName oldType = property.dynamicTypeName();

                        // removing old property, to create the new one with the same name
                        modelNode.removeProperty(name);

                        VariantProperty newProperty = modelNode.variantProperty(name);
                        QVariant newValue = convertVariantForTypeName({}, oldType);
                        newProperty.setDynamicTypeNameAndValue(oldType, newValue);
                    }

                } catch (RewritingException &e) {
                    m_exceptionError = e.description();
                    QTimer::singleShot(200, this, &DynamicPropertiesModel::handleException);
                }
            }
        }
    } else {
        qWarning() << "DynamicPropertiesModel::resetProperty: no selected nodes";
    }
}

void DynamicPropertiesModel::dispatchPropertyChanges(const AbstractProperty &abstractProperty)
{
    if (abstractProperty.parentModelNode().simplifiedTypeName() == "PropertyChanges") {
        QmlPropertyChanges changes(abstractProperty.parentModelNode());
        if (changes.target().isValid()) {
            const ModelNode target = changes.target();
            const PropertyName propertyName = abstractProperty.name();
            const AbstractProperty targetProperty = target.variantProperty(propertyName);
            if (target.hasProperty(propertyName) && targetProperty.isDynamic())
                abstractPropertyChanged(targetProperty);
        }
    }
}

void DynamicPropertiesModel::bindingPropertyChanged(const BindingProperty &bindingProperty)
{
    if (!bindingProperty.isDynamic())
        return;

    m_handleDataChanged = false;

    const QList<ModelNode> nodes = selectedNodes();
    if (!nodes.contains(bindingProperty.parentModelNode()))
        return;

    if (!m_lock) {
        int rowNumber = findRowForBindingProperty(bindingProperty);

        if (rowNumber == -1)
            addBindingProperty(bindingProperty);
        else
            updateBindingProperty(rowNumber);
    }

    m_handleDataChanged = true;
}

void DynamicPropertiesModel::abstractPropertyChanged(const AbstractProperty &property)
{
    if (!property.isDynamic())
        return;

    m_handleDataChanged = false;

    const QList<ModelNode> nodes = selectedNodes();
    if (!nodes.contains(property.parentModelNode()))
        return;

    int rowNumber = findRowForProperty(property);
    if (rowNumber > -1) {
        if (property.isVariantProperty())
            updateVariantProperty(rowNumber);
        else
            updateBindingProperty(rowNumber);
    }

    m_handleDataChanged = true;
}

void DynamicPropertiesModel::variantPropertyChanged(const VariantProperty &variantProperty)
{
    if (!variantProperty.isDynamic())
        return;

    m_handleDataChanged = false;

    const QList<ModelNode> nodes = selectedNodes();
    if (!nodes.contains(variantProperty.parentModelNode()))
        return;

    if (!m_lock) {
        int rowNumber = findRowForVariantProperty(variantProperty);

        if (rowNumber == -1)
            addVariantProperty(variantProperty);
        else
            updateVariantProperty(rowNumber);
    }

    m_handleDataChanged = true;
}

void DynamicPropertiesModel::bindingRemoved(const BindingProperty &bindingProperty)
{
    m_handleDataChanged = false;

    const QList<ModelNode> nodes = selectedNodes();
    if (!nodes.contains(bindingProperty.parentModelNode()))
        return;

    if (!m_lock) {
        int rowNumber = findRowForBindingProperty(bindingProperty);
        removeRow(rowNumber);
    }

    emit currentIndexChanged();

    m_handleDataChanged = true;
}

void DynamicPropertiesModel::variantRemoved(const VariantProperty &variantProperty)
{
    m_handleDataChanged = false;

    const QList<ModelNode> nodes = selectedNodes();
    if (!nodes.contains(variantProperty.parentModelNode()))
        return;

    if (!m_lock) {
        int rowNumber = findRowForVariantProperty(variantProperty);
        removeRow(rowNumber);
    }

    emit currentIndexChanged();

    m_handleDataChanged = true;
}

void DynamicPropertiesModel::reset()
{
    m_handleDataChanged = false;
    resetModel();
    m_handleDataChanged = true;
    emit currentIndexChanged();
}

void DynamicPropertiesModel::setSelectedNode(const ModelNode &node)
{
    QTC_ASSERT(m_explicitSelection, return);

    if (!node.isValid())
        return;

    m_selectedNodes.clear();
    m_selectedNodes.append(node);
    reset();
}

AbstractProperty DynamicPropertiesModel::abstractPropertyForRow(int rowNumber) const
{
    const int internalId = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 1).toInt();
    const QString targetPropertyName = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 2)
                                           .toString();

    if (!m_view->isAttached())
        return AbstractProperty();

    ModelNode modelNode = m_view->modelNodeForInternalId(internalId);

    if (modelNode.isValid())
        return modelNode.property(targetPropertyName.toUtf8());

    return {};
}

BindingProperty DynamicPropertiesModel::bindingPropertyForRow(int rowNumber) const
{
    const int internalId = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 1).toInt();
    const QString targetPropertyName = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 2).toString();

    ModelNode  modelNode = m_view->modelNodeForInternalId(internalId);

    if (modelNode.isValid())
        return modelNode.bindingProperty(targetPropertyName.toUtf8());

    return {};
}

VariantProperty DynamicPropertiesModel::variantPropertyForRow(int rowNumber) const
{
    const int internalId = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 1).toInt();
    const QString targetPropertyName = data(index(rowNumber, TargetModelNodeRow), Qt::UserRole + 2).toString();

    ModelNode  modelNode = m_view->modelNodeForInternalId(internalId);

    if (modelNode.isValid())
        return modelNode.variantProperty(targetPropertyName.toUtf8());

    return {};
}

QStringList DynamicPropertiesModel::possibleTargetProperties(const BindingProperty &bindingProperty) const
{
    const ModelNode modelNode = bindingProperty.parentModelNode();

    if (!modelNode.isValid()) {
        qWarning() << " BindingModel::possibleTargetPropertiesForRow invalid model node";
        return QStringList();
    }

    NodeMetaInfo metaInfo = modelNode.metaInfo();

    if (metaInfo.isValid()) {
        QStringList possibleProperties;
        const PropertyMetaInfos props = metaInfo.properties();
        for (const auto &property : props) {
            if (property.isWritable())
                possibleProperties.push_back(QString::fromUtf8(property.name()));
        }

        return possibleProperties;
    }

    return {};
}

void DynamicPropertiesModel::addDynamicPropertyForCurrentNode()
{
    QmlDesignerPlugin::emitUsageStatistics(Constants::EVENT_PROPERTY_ADDED);

    if (selectedNodes().size() == 1) {
        const ModelNode modelNode = selectedNodes().constFirst();
        if (modelNode.isValid()) {
            try {
                modelNode.variantProperty(unusedProperty(modelNode)).setDynamicTypeNameAndValue("string", "This is a string");
            } catch (RewritingException &e) {
                m_exceptionError = e.description();
                QTimer::singleShot(200, this, &DynamicPropertiesModel::handleException);
            }
        }
    } else {
        qWarning() << " BindingModel::addBindingForCurrentNode not one node selected";
    }
}

QStringList DynamicPropertiesModel::possibleSourceProperties(const BindingProperty &bindingProperty) const
{
    const QString expression = bindingProperty.expression();
    const QStringList stringlist = expression.split(QLatin1String("."));

    NodeMetaInfo type;

    if (auto metaInfo = bindingProperty.parentModelNode().metaInfo(); metaInfo.isValid())
        type = metaInfo.property(bindingProperty.name()).propertyType();
    else
        qWarning() << " BindingModel::possibleSourcePropertiesForRow no meta info for target node";

    const QString &id = stringlist.constFirst();

    ModelNode modelNode = getNodeByIdOrParent(id, bindingProperty.parentModelNode());

    if (!modelNode.isValid()) {
        qWarning() << " BindingModel::possibleSourcePropertiesForRow invalid model node";
        return QStringList();
    }

    NodeMetaInfo metaInfo = modelNode.metaInfo();

    if (metaInfo.isValid())  {
        QStringList possibleProperties;
        const PropertyMetaInfos props = metaInfo.properties();
        for (const auto &property : props) {
            if (property.propertyType() == type) // TODO: proper check
                possibleProperties.push_back(QString::fromUtf8(property.name()));
        }
        return possibleProperties;
    } else {
        qWarning() << " BindingModel::possibleSourcePropertiesForRow no meta info for source node";
    }

    return {};
}

void DynamicPropertiesModel::deleteDynamicPropertyByRow(int rowNumber)
{
    m_view->executeInTransaction(__FUNCTION__, [this, rowNumber]() {
        const AbstractProperty property = abstractPropertyForRow(rowNumber);
        const PropertyName propertyName = property.name();
        BindingProperty bindingProperty = bindingPropertyForRow(rowNumber);
        if (bindingProperty.isValid()) {
            bindingProperty.parentModelNode().removeProperty(bindingProperty.name());
        } else {
            VariantProperty variantProperty = variantPropertyForRow(rowNumber);
            if (variantProperty.isValid())
                variantProperty.parentModelNode().removeProperty(variantProperty.name());
        }

        if (property.isValid()) {
            QmlObjectNode objectNode = QmlObjectNode(property.parentModelNode());
            const auto stateOperations = objectNode.allAffectingStatesOperations();
            for (const QmlModelStateOperation &stateOperation : stateOperations) {
                if (stateOperation.modelNode().hasProperty(propertyName))
                    stateOperation.modelNode().removeProperty(propertyName);
            }

            const QList<ModelNode> timelineNodes = objectNode.allTimelines();
            for (auto &timelineNode : timelineNodes) {
                QmlTimeline timeline(timelineNode);
                timeline.removeKeyframesForTargetAndProperty(objectNode.modelNode(),
                                                             propertyName);
            }
        }
    });

    resetModel();
}

void DynamicPropertiesModel::addProperty(const QVariant &propertyValue,
                                         const QString &propertyType,
                                         const AbstractProperty &abstractProperty)
{
    QList<QStandardItem*> items;

    QStandardItem *idItem;
    QStandardItem *propertyNameItem;
    QStandardItem *propertyTypeItem;
    QStandardItem *propertyValueItem;

    idItem = new QStandardItem(idOrTypeNameForNode(abstractProperty.parentModelNode()));
    updateCustomData(idItem, abstractProperty);

    const QString propName = QString::fromUtf8(abstractProperty.name());
    propertyNameItem = new QStandardItem(propName);

    items.append(idItem);
    items.append(propertyNameItem);

    propertyTypeItem = new QStandardItem(propertyType);
    items.append(propertyTypeItem);

    propertyValueItem = new QStandardItem();
    propertyValueItem->setData(propertyValue, Qt::DisplayRole);
    items.append(propertyValueItem);

    for (int i = 0; i < rowCount(); ++i) {
        if (data(index(i, PropertyNameRow)).toString() > propName) {
            insertRow(i, items);
            return;
        }
    }

    appendRow(items);
}

void DynamicPropertiesModel::addBindingProperty(const BindingProperty &property)
{
    QVariant value = property.expression();
    QString type = QString::fromLatin1(property.dynamicTypeName());
    addProperty(value, type, property);
}

void DynamicPropertiesModel::addVariantProperty(const VariantProperty &property)
{
    QVariant value = property.value();
    QString type = QString::fromLatin1(property.dynamicTypeName());
    addProperty(value, type, property);
}

void DynamicPropertiesModel::updateBindingProperty(int rowNumber)
{
    BindingProperty bindingProperty = bindingPropertyForRow(rowNumber);

    if (bindingProperty.isValid()) {
        updateCustomData(rowNumber, bindingProperty);

        QString propertyName = QString::fromUtf8(bindingProperty.name());
        updateDisplayRole(rowNumber, PropertyNameRow, propertyName);
        QString value = bindingProperty.expression();
        QString type = QString::fromUtf8(bindingProperty.dynamicTypeName());
        updateDisplayRole(rowNumber, PropertyTypeRow, type);
        updateDisplayRole(rowNumber, PropertyValueRow, value);

        const QmlObjectNode objectNode = QmlObjectNode(bindingProperty.parentModelNode());
        if (objectNode.isValid() && !objectNode.view()->currentState().isBaseState())
            value = objectNode.expression(bindingProperty.name());

        updateDisplayRole(rowNumber, PropertyValueRow, value);
    }
}

void DynamicPropertiesModel::updateVariantProperty(int rowNumber)
{
    VariantProperty variantProperty = variantPropertyForRow(rowNumber);

    if (variantProperty.isValid()) {
        updateCustomData(rowNumber, variantProperty);
        QString propertyName = QString::fromUtf8(variantProperty.name());
        updateDisplayRole(rowNumber, PropertyNameRow, propertyName);
        QVariant value = variantProperty.value();
        QString type = QString::fromUtf8(variantProperty.dynamicTypeName());
        updateDisplayRole(rowNumber, PropertyTypeRow, type);
        const QmlObjectNode objectNode = QmlObjectNode(variantProperty.parentModelNode());
        if (objectNode.isValid() && !objectNode.view()->currentState().isBaseState())
            value = objectNode.modelValue(variantProperty.name());

        updateDisplayRoleFromVariant(rowNumber, PropertyValueRow, value);
    }
}

void DynamicPropertiesModel::addModelNode(const ModelNode &modelNode)
{
    if (!modelNode.isValid())
        return;

    const QList<AbstractProperty> properties = modelNode.properties();
    QList<AbstractProperty> dynamicProperties = Utils::filtered(properties, [](const AbstractProperty &p) {
        return p.isDynamic();
    });

    Utils::sort(dynamicProperties, [](const AbstractProperty &a, const AbstractProperty &b) {
        return a.name() < b.name();
    });

    for (const AbstractProperty &property : std::as_const(dynamicProperties)) {
        if (property.isBindingProperty())
            addBindingProperty(property.toBindingProperty());
        else if (property.isVariantProperty())
            addVariantProperty(property.toVariantProperty());
    }
}

void DynamicPropertiesModel::updateValue(int row)
{
    BindingProperty bindingProperty = bindingPropertyForRow(row);

    if (bindingProperty.isBindingProperty()) {
        const QString expression = data(index(row, PropertyValueRow)).toString();

        RewriterTransaction transaction = m_view->beginRewriterTransaction(__FUNCTION__);
        try {
            bindingProperty.setDynamicTypeNameAndExpression(bindingProperty.dynamicTypeName(), expression);
            transaction.commit(); // committing in the try block
        } catch (Exception &e) {
            m_exceptionError = e.description();
            QTimer::singleShot(200, this, &DynamicPropertiesModel::handleException);
        }
        return;
    }

    VariantProperty variantProperty = variantPropertyForRow(row);

    if (variantProperty.isVariantProperty()) {
        const QVariant value = data(index(row, PropertyValueRow));

        RewriterTransaction transaction = m_view->beginRewriterTransaction(__FUNCTION__);
        try {
            variantProperty.setDynamicTypeNameAndValue(variantProperty.dynamicTypeName(), value);
            transaction.commit(); // committing in the try block
        } catch (Exception &e) {
            m_exceptionError = e.description();
            QTimer::singleShot(200, this, &DynamicPropertiesModel::handleException);
        }
    }
}

void DynamicPropertiesModel::updatePropertyName(int rowNumber)
{
    const PropertyName newName = data(index(rowNumber, PropertyNameRow)).toString().toUtf8();
    QTC_ASSERT(!newName.isEmpty(), return);

    BindingProperty bindingProperty = bindingPropertyForRow(rowNumber);

    ModelNode targetNode = bindingProperty.parentModelNode();

    if (bindingProperty.isBindingProperty()) {
        m_view->executeInTransaction(__FUNCTION__, [bindingProperty, newName, &targetNode]() {
            const QString expression = bindingProperty.expression();
            const PropertyName dynamicPropertyType = bindingProperty.dynamicTypeName();

            targetNode.bindingProperty(newName).setDynamicTypeNameAndExpression(dynamicPropertyType, expression);
            targetNode.removeProperty(bindingProperty.name());
        });

        updateCustomData(rowNumber, targetNode.bindingProperty(newName));
        return;
    }

    VariantProperty variantProperty = variantPropertyForRow(rowNumber);

    if (variantProperty.isVariantProperty()) {
        const QVariant value = variantProperty.value();
        const PropertyName dynamicPropertyType = variantProperty.dynamicTypeName();
        ModelNode targetNode = variantProperty.parentModelNode();

        m_view->executeInTransaction(__FUNCTION__, [=]() {
            targetNode.variantProperty(newName).setDynamicTypeNameAndValue(dynamicPropertyType, value);
            targetNode.removeProperty(variantProperty.name());
        });

        updateCustomData(rowNumber, targetNode.variantProperty(newName));
    }
}

void DynamicPropertiesModel::updatePropertyType(int rowNumber)
{
    const TypeName newType = data(index(rowNumber, PropertyTypeRow)).toString().toLatin1();
    QTC_ASSERT(!newType.isEmpty(), return);

    BindingProperty bindingProperty = bindingPropertyForRow(rowNumber);

    if (bindingProperty.isBindingProperty()) {
        const QString expression = bindingProperty.expression();
        const PropertyName propertyName = bindingProperty.name();
        ModelNode targetNode = bindingProperty.parentModelNode();

        m_view->executeInTransaction(__FUNCTION__, [=]() {
            targetNode.removeProperty(bindingProperty.name());
            targetNode.bindingProperty(propertyName).setDynamicTypeNameAndExpression(newType, expression);
        });

        updateCustomData(rowNumber, targetNode.bindingProperty(propertyName));
        return;
    }

    VariantProperty variantProperty = variantPropertyForRow(rowNumber);

    if (variantProperty.isVariantProperty()) {
        const QVariant value = variantProperty.value();
        ModelNode targetNode = variantProperty.parentModelNode();
        const PropertyName propertyName = variantProperty.name();

        m_view->executeInTransaction(__FUNCTION__, [=]() {
            targetNode.removeProperty(variantProperty.name());
            if (!isValueType(newType)) {
                targetNode.bindingProperty(propertyName).setDynamicTypeNameAndExpression(
                            newType, convertVariantForTypeName({}, newType).toString());
            } else {
                targetNode.variantProperty(propertyName).setDynamicTypeNameAndValue(
                            newType, convertVariantForTypeName(value, newType));
            }
        });

        updateCustomData(rowNumber, targetNode.variantProperty(propertyName));

        if (variantProperty.isVariantProperty())
            updateVariantProperty(rowNumber);
        else if (bindingProperty.isBindingProperty())
            updateBindingProperty(rowNumber);
    }
}

ModelNode DynamicPropertiesModel::getNodeByIdOrParent(const QString &id, const ModelNode &targetNode) const
{
    if (id != QLatin1String("parent"))
        return m_view->modelNodeForId(id);

    if (targetNode.hasParentProperty())
        return targetNode.parentProperty().parentModelNode();

    return {};
}

void DynamicPropertiesModel::updateCustomData(QStandardItem *item, const AbstractProperty &property)
{
    item->setData(property.parentModelNode().internalId(), Qt::UserRole + 1);
    item->setData(property.name(), Qt::UserRole + 2);

    item->setData(property.parentModelNode().id(), TargetNameRole);
    item->setData(property.name(), PropertyNameRole);
    item->setData(property.parentModelNode().id(), TargetNameRole);
    item->setData(property.dynamicTypeName(), PropertyTypeRole);

    if (property.isVariantProperty())
        item->setData(property.toVariantProperty().value(), PropertyValueRole);
    if (property.isBindingProperty())
        item->setData(property.toBindingProperty().expression(), PropertyValueRole);
}

void DynamicPropertiesModel::updateCustomData(int row, const AbstractProperty &property)
{
    QStandardItem* idItem = item(row, 0);
    updateCustomData(idItem, property);
}

int DynamicPropertiesModel::findRowForBindingProperty(const BindingProperty &bindingProperty) const
{
    for (int i = 0; i < rowCount(); ++i) {
        if (compareBindingProperties(bindingPropertyForRow(i), bindingProperty))
            return i;
    }

    return -1; // not found
}

int DynamicPropertiesModel::findRowForVariantProperty(const VariantProperty &variantProperty) const
{
    for (int i = 0; i < rowCount(); ++i) {
        if (compareVariantProperties(variantPropertyForRow(i), variantProperty))
            return i;
    }

    return -1; // not found
}

int DynamicPropertiesModel::findRowForProperty(const AbstractProperty &abstractProperty) const
{
    for (int i = 0; i < rowCount(); ++i) {
        if ((abstractPropertyForRow(i).name() == abstractProperty.name()))
            return i;
    }

    return -1; // not found
}

bool DynamicPropertiesModel::getExpressionStrings(const BindingProperty &bindingProperty, QString *sourceNode,
                                                  QString *sourceProperty)
{
    // TODO: we assume no expressions yet

    const QString expression = bindingProperty.expression();

    if (true) {
        const QStringList expressionParts = expression.split('.');

        *sourceNode = expressionParts.constFirst();

        QString propertyName;

        for (int i = 1; i < expressionParts.size(); ++i) {
            propertyName += expressionParts.at(i);
            if (i != expressionParts.size() - 1)
                propertyName += QLatin1String(".");
        }
        *sourceProperty = propertyName;
    }

    return true;
}

void DynamicPropertiesModel::updateDisplayRole(int row, int columns, const QString &string)
{
    QModelIndex modelIndex = index(row, columns);
    if (data(modelIndex).toString() != string)
        setData(modelIndex, string);
}

void DynamicPropertiesModel::updateDisplayRoleFromVariant(int row, int columns, const QVariant &variant)
{
    QModelIndex modelIndex = index(row, columns);
    if (data(modelIndex) != variant)
        setData(modelIndex, variant);
}


void DynamicPropertiesModel::handleDataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
{
    if (!m_handleDataChanged)
        return;

    if (topLeft != bottomRight) {
        qWarning() << __FUNCTION__ << ": multi edit?";
        return;
    }

    m_lock = true;

    int currentColumn = topLeft.column();
    int currentRow = topLeft.row();

    switch (currentColumn) {
    case TargetModelNodeRow: {
        // updating user data
    } break;
    case PropertyNameRow: {
        updatePropertyName(currentRow);
    } break;
    case PropertyTypeRow: {
        updatePropertyType(currentRow);
    } break;
    case PropertyValueRow: {
        updateValue(currentRow);
    } break;

    default: qWarning() << __FUNCTION__ << " column" << currentColumn;
    }

    m_lock = false;
}

void DynamicPropertiesModel::handleException()
{
    QMessageBox::warning(nullptr, tr("Error"), m_exceptionError);
    resetModel();
}

const QList<ModelNode> DynamicPropertiesModel::selectedNodes() const
{
    // If selected nodes are explicitly set, return those.
    // Otherwise return actual selected nodes of the model.
    if (m_explicitSelection)
        return m_selectedNodes;

    return m_view->selectedModelNodes();
}

const ModelNode DynamicPropertiesModel::singleSelectedNode() const
{
    if (m_explicitSelection)
        return m_selectedNodes.first();

    return m_view->singleSelectedModelNode();
}

QHash<int, QByteArray> DynamicPropertiesModel::roleNames() const
{
    static QHash<int, QByteArray> roleNames{{TargetNameRole, "target"},
                                            {PropertyNameRole, "name"},
                                            {PropertyTypeRole, "type"},
                                            {PropertyValueRole, "value"}};

    return roleNames;
}

DynamicPropertiesModelBackendDelegate *DynamicPropertiesModel::delegate() const
{
    return m_delegate;
}

DynamicPropertiesModelBackendDelegate::DynamicPropertiesModelBackendDelegate(
    DynamicPropertiesModel *parent)
    : QObject(parent)
{
    m_type.setModel({"int", "bool", "var", "real", "string", "url", "color"});

    connect(&m_type, &StudioQmlComboBoxBackend::activated, this, [this]() { handleTypeChanged(); });
    connect(&m_name, &StudioQmlTextBackend::activated, this, [this]() { handleNameChanged(); });
    connect(&m_value, &StudioQmlTextBackend::activated, this, [this]() { handleValueChanged(); });
}

int DynamicPropertiesModelBackendDelegate::currentRow() const
{
    return m_currentRow;
}

void DynamicPropertiesModelBackendDelegate::setCurrentRow(int i)
{
    if (m_currentRow == i)
        return;

    m_currentRow = i;

    //setup

    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());

    QTC_ASSERT(model, return );

    AbstractProperty property = model->abstractPropertyForRow(i);

    m_type.setCurrentText(QString::fromUtf8(property.dynamicTypeName()));
    m_name.setText(QString::fromUtf8(property.name()));

    if (property.isVariantProperty())
        m_value.setText(property.toVariantProperty().value().toString());
    else if (property.isBindingProperty())
        m_value.setText(property.toBindingProperty().expression());
}

void DynamicPropertiesModelBackendDelegate::handleTypeChanged()
{
    //void DynamicPropertiesModel::updatePropertyType(int rowNumber)
    const TypeName type = m_type.currentText().toUtf8();

    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());

    QTC_ASSERT(model, return );
    QTC_ASSERT(model->view(), return );

    BindingProperty bindingProperty = model->bindingPropertyForRow(currentRow());

    VariantProperty variantProperty = model->variantPropertyForRow(currentRow());

    RewriterTransaction transaction = model->view()->beginRewriterTransaction(__FUNCTION__);

    try {
        if (bindingProperty.isBindingProperty() || type == "var") { //var is always a binding
            const QString expression = bindingProperty.expression();
            variantProperty.parentModelNode().removeProperty(variantProperty.name());
            bindingProperty.setDynamicTypeNameAndExpression(type, expression);
        } else if (variantProperty.isVariantProperty()) {
            variantProperty.parentModelNode().removeProperty(variantProperty.name());
            variantProperty.setDynamicTypeNameAndValue(type, variantValue());
        }
        transaction.commit(); // committing in the try block
    } catch (Exception &e) {
        m_exceptionError = e.description();
        QTimer::singleShot(200, this, &DynamicPropertiesModelBackendDelegate::handleException);
    }
}

void DynamicPropertiesModelBackendDelegate::handleNameChanged()
{
    //see  DynamicPropertiesModel::updatePropertyName

    const PropertyName newName = m_name.text().toUtf8();
    QTC_ASSERT(!newName.isEmpty(), return );

    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());

    QTC_ASSERT(model, return );
    QTC_ASSERT(model->view(), return );

    BindingProperty bindingProperty = model->bindingPropertyForRow(currentRow());

    ModelNode targetNode = bindingProperty.parentModelNode();

    if (bindingProperty.isBindingProperty()) {
        model->view()->executeInTransaction(__FUNCTION__, [bindingProperty, newName, &targetNode]() {
            const QString expression = bindingProperty.expression();
            const PropertyName dynamicPropertyType = bindingProperty.dynamicTypeName();

            targetNode.bindingProperty(newName).setDynamicTypeNameAndExpression(dynamicPropertyType,
                                                                                expression);
            targetNode.removeProperty(bindingProperty.name());
        });

        return;
    }

    VariantProperty variantProperty = model->variantPropertyForRow(currentRow());

    if (variantProperty.isVariantProperty()) {
        const QVariant value = variantProperty.value();
        const PropertyName dynamicPropertyType = variantProperty.dynamicTypeName();
        ModelNode targetNode = variantProperty.parentModelNode();

        model->view()->executeInTransaction(__FUNCTION__, [=]() {
            targetNode.variantProperty(newName).setDynamicTypeNameAndValue(dynamicPropertyType,
                                                                           value);
            targetNode.removeProperty(variantProperty.name());
        });
    }

    AbstractProperty property = targetNode.property(newName);

    //order might have changed because of name change we have to select the correct row
    int newRow = model->findRowForProperty(property);
    model->setCurrentIndex(newRow);
    setCurrentRow(newRow);
}

void DynamicPropertiesModelBackendDelegate::handleValueChanged()
{
    //see void DynamicPropertiesModel::updateValue(int row)

    DynamicPropertiesModel *model = qobject_cast<DynamicPropertiesModel *>(parent());

    QTC_ASSERT(model, return );
    QTC_ASSERT(model->view(), return );

    BindingProperty bindingProperty = model->bindingPropertyForRow(currentRow());

    if (bindingProperty.isBindingProperty()) {
        const QString expression = m_value.text();

        RewriterTransaction transaction = model->view()->beginRewriterTransaction(__FUNCTION__);
        try {
            bindingProperty.setDynamicTypeNameAndExpression(bindingProperty.dynamicTypeName(),
                                                            expression);
            transaction.commit(); // committing in the try block
        } catch (Exception &e) {
            m_exceptionError = e.description();
            QTimer::singleShot(200, this, &DynamicPropertiesModelBackendDelegate::handleException);
        }
        return;
    }

    VariantProperty variantProperty = model->variantPropertyForRow(currentRow());

    if (variantProperty.isVariantProperty()) {
        RewriterTransaction transaction = model->view()->beginRewriterTransaction(__FUNCTION__);
        try {
            variantProperty.setDynamicTypeNameAndValue(variantProperty.dynamicTypeName(),
                                                       variantValue());
            transaction.commit(); // committing in the try block
        } catch (Exception &e) {
            m_exceptionError = e.description();
            QTimer::singleShot(200, this, &DynamicPropertiesModelBackendDelegate::handleException);
        }
    }
}

void DynamicPropertiesModelBackendDelegate::handleException()
{
    QMessageBox::warning(nullptr, tr("Error"), m_exceptionError);
    //reset
}

QVariant DynamicPropertiesModelBackendDelegate::variantValue() const
{
    //improve
    const QString type = m_type.currentText();
    if (type == "real" || type == "int")
        return m_value.text().toFloat();

    if (type == "bool")
        return m_value.text() == "true";

    return m_value.text();
}

StudioQmlComboBoxBackend *DynamicPropertiesModelBackendDelegate::type()
{
    return &m_type;
}

StudioQmlTextBackend *DynamicPropertiesModelBackendDelegate::name()
{
    return &m_name;
}

StudioQmlTextBackend *DynamicPropertiesModelBackendDelegate::value()
{
    return &m_value;
}

} // namespace QmlDesigner