Add: added a function to get an arbitrary role of a model item

Example:
$D{appdata.Column_1}
$S{
var vRow = line('DataBand1') - 1;
// 8 - Qt::BackgroundRole
var vColor = getFieldByRowIndexEx('appdata.Column_1', vRow, 8);

THIS.backgroundColor = LimeReport.color('lightgray');
if(vColor > '')
{
	THIS.backgroundColor = vColor;
}
''
}

Added several functions to get extended information from the model

- getFieldByRowIndexEx2(fieldName, rowIndex, roleName), default:
Qt::DisplayRole

- getHeaderData(fieldName, roleName), default: Qt::DisplayRole

- getHeaderColumnNameByIndex(datasourceName, columnIndex), default:
Qt::UserRole or Qt::DisplayRole

- getColumnCount(datasourceName), default: -1

limereport/lrdatadesignintf.cpp

@@ -272,6 +272,24 @@ QVariant ModelToDataSource::dataByRowIndex(const QString &columnName, int rowInd
     return QVariant();
 }
 
+QVariant ModelToDataSource::dataByRowIndex(const QString &columnName, int rowIndex, int roleName)
+{
+    if(m_model->rowCount() > rowIndex)
+        return m_model->data(m_model->index(rowIndex, columnIndexByName(columnName)));
+    return QVariant();
+}
+
+QVariant ModelToDataSource::dataByRowIndex(const QString &columnName, int rowIndex, const QString &roleName)
+{
+    if(m_model->rowCount() > rowIndex) {
+        int roleCode{roleName.isEmpty() ? Qt::DisplayRole
+                                        : m_model->roleNames().key(roleName.toUtf8(), Qt::DisplayRole)};
+        return m_model->data(m_model->index(rowIndex, columnIndexByName(columnName)), roleCode);
+    }
+
+    return QVariant();
+}
+
 QVariant ModelToDataSource::dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData)
 {
    for( int i=0; i < m_model->rowCount(); ++i ){
@@ -310,6 +328,13 @@ int ModelToDataSource::columnIndexByName(QString name)
     return -1;
 }
 
+QVariant ModelToDataSource::headerData(const QString &columnName, const QString &roleName)
+{
+    int roleCode{roleName.isEmpty() ? Qt::DisplayRole
+                                    : m_model->roleNames().key(roleName.toUtf8(), Qt::DisplayRole)};
+    return m_model->headerData(columnIndexByName(columnName), Qt::Horizontal, roleCode);
+}
+
 QString ModelToDataSource::lastError()
 {
     return m_lastError;
@@ -722,6 +747,18 @@ QVariant CallbackDatasource::dataByRowIndex(const QString &columnName, int rowIn
     return result;
 }
 
+QVariant CallbackDatasource::dataByRowIndex(const QString &columnName, int rowIndex, int roleName)
+{
+    Q_UNUSED(roleName)
+    return dataByRowIndex(columnName, rowIndex);
+}
+
+QVariant CallbackDatasource::dataByRowIndex(const QString &columnName, int rowIndex, const QString &roleName)
+{
+    Q_UNUSED(roleName)
+    return dataByRowIndex(columnName, rowIndex);
+}
+
 QVariant CallbackDatasource::dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData)
 {
     int backupCurrentRow = m_currentRow;
@@ -816,6 +853,12 @@ int CallbackDatasource::columnIndexByName(QString name)
     return -1;
 }
 
+QVariant CallbackDatasource::headerData(const QString &columnName, const QString &roleName)
+{
+    Q_UNUSED(roleName)
+    return columnName; // STUB
+}
+
 bool CallbackDatasource::checkNextRecord(int recordNum){
     if (bof()) checkIfEmpty();
     if (m_rowCount > 0) {

limereport/lrdatadesignintf.h

@@ -388,10 +388,13 @@ public:
     bool bof();
     QVariant data(const QString& columnName);
     QVariant dataByRowIndex(const QString &columnName, int rowIndex);
+    QVariant dataByRowIndex(const QString &columnName, int rowIndex, int roleName);
+    QVariant dataByRowIndex(const QString &columnName, int rowIndex, const QString &roleName);
     QVariant dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData);
     int columnCount();
     QString columnNameByIndex(int columnIndex);
     int columnIndexByName(QString name);
+    QVariant headerData(const QString &columnName, const QString &roleName);
     QString lastError();
     virtual QAbstractItemModel* model();
     int currentRow();
@@ -421,6 +424,8 @@ public:
     bool eof(){return m_eof;}
     QVariant data(const QString &columnName);
     QVariant dataByRowIndex(const QString& columnName, int rowIndex);
+    QVariant dataByRowIndex(const QString &columnName, int rowIndex, int roleName);
+    QVariant dataByRowIndex(const QString &columnName, int rowIndex, const QString &roleName);
     QVariant dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData);
     int columnCount();
     QString columnNameByIndex(int columnIndex);
@@ -428,6 +433,7 @@ public:
     bool isInvalid() const{ return false;}
     QString lastError(){ return "";}
     QAbstractItemModel *model(){return 0;}
+    QVariant headerData(const QString &columnName, const QString &roleName);
 private:
     bool checkNextRecord(int recordNum);
     bool checkIfEmpty();
@@ -441,6 +447,7 @@ private:
     QHash<QString, QVariant> m_valuesCache;
     bool m_getDataFromCache;
     int m_lastKeyRow;
+
 };
 
 class CallbackDatasourceHolder :public QObject, public IDataSourceHolder{

limereport/lrdatasourceintf.h

@@ -18,9 +18,12 @@ public:
     virtual bool eof() = 0;
     virtual QVariant data(const QString& columnName) = 0;
     virtual QVariant dataByRowIndex(const QString& columnName, int rowIndex) = 0;
+    virtual QVariant dataByRowIndex(const QString &columnName, int rowIndex, int roleName) = 0;
+    virtual QVariant dataByRowIndex(const QString &columnName, int rowIndex, const QString &roleName) = 0;
     virtual QVariant dataByKeyField(const QString& columnName, const QString& keyColumnName, QVariant keyData) = 0;
     virtual int columnCount() = 0;
     virtual QString columnNameByIndex(int columnIndex) = 0;
+    virtual QVariant headerData(const QString &columnName, const QString &roleName) = 0;
     virtual int columnIndexByName(QString name) = 0;
     virtual bool isInvalid() const = 0;
     virtual QString lastError() = 0;

limereport/lrdatasourcemanager.cpp

@@ -1689,6 +1689,28 @@ QVariant DataSourceManager::fieldDataByRowIndex(const QString &fieldName, int ro
     return QVariant();
 }
 
+QVariant DataSourceManager::fieldDataByRowIndex(const QString &fieldName, int rowIndex, int role)
+{
+    if(containsField(fieldName)) {
+        IDataSource *ds = dataSource(extractDataSource(fieldName));
+        if(ds) {
+            return ds->dataByRowIndex(extractFieldName(fieldName), rowIndex, role);
+        }
+    }
+    return QVariant();
+}
+
+QVariant DataSourceManager::fieldDataByRowIndex(const QString &fieldName, int rowIndex, const QString &roleName)
+{
+    if(containsField(fieldName)) {
+        IDataSource *ds = dataSource(extractDataSource(fieldName));
+        if(ds) {
+            return ds->dataByRowIndex(extractFieldName(fieldName), rowIndex, roleName);
+        }
+    }
+    return QVariant();
+}
+
 QVariant DataSourceManager::fieldDataByKey(const QString& datasourceName, const QString& valueFieldName, const QString& keyFieldName, QVariant keyValue)
 {
     IDataSource* ds = dataSource(datasourceName);
@@ -1698,6 +1720,36 @@ QVariant DataSourceManager::fieldDataByKey(const QString& datasourceName, const
     return QVariant();
 }
 
+QVariant DataSourceManager::headerData(const QString &fieldName, const QString &roleName)
+{
+    if(containsField(fieldName)) {
+        IDataSource *ds = dataSource(extractDataSource(fieldName));
+        if(ds) {
+            return ds->headerData(extractFieldName(fieldName), roleName);
+        }
+    }
+    return QVariant();
+}
+
+QString DataSourceManager::columnName(const QString &datasourceName, int index)
+{
+    IDataSource *ds = dataSource(datasourceName);
+    if(ds && !ds->isInvalid() && ds->columnCount() > index) {
+        return ds->columnNameByIndex(index);
+    }
+    return QString("unknown");
+}
+
+int DataSourceManager::columnCount(const QString &datasourceName)
+{
+    IDataSource *ds = dataSource(datasourceName);
+    if(ds && !ds->isInvalid()) {
+        return ds->columnCount();
+    }
+
+    return -1;
+}
+
 void DataSourceManager::reopenDatasource(const QString& datasourceName)
 {
     QueryHolder* qh = dynamic_cast<QueryHolder*>(dataSourceHolder(datasourceName));

limereport/lrdatasourcemanager.h

@@ -173,12 +173,17 @@ public:
     bool        containsField(const QString& fieldName);
     QVariant    fieldData(const QString& fieldName);
     QVariant    fieldDataByRowIndex(const QString& fieldName, int rowIndex);
+    QVariant    fieldDataByRowIndex(const QString &fieldName, int rowIndex, int role);
+    QVariant    fieldDataByRowIndex(const QString &fieldName, int rowIndex, const QString &roleName);
     QVariant    fieldDataByKey(
             const QString& datasourceName,
             const QString& valueFieldName,
             const QString& keyFieldName,
             QVariant keyValue
     );
+    QVariant headerData(const QString &fieldName, const QString &roleName);
+    QString columnName(const QString &datasourceName, int index);
+    int columnCount(const QString &datasourceName);
     void    reopenDatasource(const QString& datasourceName);
 
     QString extractDataSource(const QString& fieldName);

limereport/lrscriptenginemanager.cpp

@@ -1073,6 +1073,79 @@ bool ScriptEngineManager::createReopenDatasourceFunction()
     return addFunction(fd);
 }
 
+bool ScriptEngineManager::createGetFieldByRowIndexEx()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("getFieldByRowIndexEx");
+    fd.setDescription("getFieldByRowIndexEx(\"" + tr("FieldName") + "\", \"" + tr("RowIndex")
+                    + "\", \"" + tr("RoleIndex") + "\")");
+    fd.setScriptWrapper(QString("function getFieldByRowIndexEx(fieldName, rowIndex, role){"
+                              "return %1.getFieldByRowIndexEx(fieldName, rowIndex, role);}")
+                          .arg(LimeReport::Const::FUNCTION_MANAGER_NAME));
+    return addFunction(fd);
+}
+
+bool ScriptEngineManager::createGetFieldByRowIndexEx2()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("getFieldByRowIndexEx2");
+    fd.setDescription("getFieldByRowIndexEx2(\"" + tr("FieldName") + "\", \"" + tr("RowIndex")
+                      + "\", \"" + tr("RoleName") + "\")");
+    fd.setScriptWrapper(QString("function getFieldByRowIndexEx2(fieldName, rowIndex, role){"
+                                "return %1.getFieldByRowIndexEx2(fieldName, rowIndex, role);}")
+                            .arg(LimeReport::Const::FUNCTION_MANAGER_NAME));
+    return addFunction(fd);
+}
+
+bool ScriptEngineManager::createHeaderData()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("getHeaderData");
+    fd.setDescription("getHeaderData(\"" + tr("FieldName") + "\", \"" + tr("RoleName") + "\")");
+    fd.setScriptWrapper(QString("function getHeaderData(fieldName, role){"
+                                "return %1.getHeaderData(fieldName, role);}")
+                            .arg(LimeReport::Const::FUNCTION_MANAGER_NAME));
+    return addFunction(fd);
+}
+
+bool ScriptEngineManager::createHeaderColumnNameByIndex()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("getHeaderColumnNameByIndex");
+    fd.setDescription("getHeaderColumnNameByIndex(\"" + tr("datasourceName") + "\", \""
+                      + tr("columnIndex") + "\")");
+    fd.setScriptWrapper(QString("function getHeaderColumnNameByIndex(datasourceName, columnIndex){"
+                                "return %1.getHeaderColumnNameByIndex(datasourceName, columnIndex);}")
+                            .arg(LimeReport::Const::FUNCTION_MANAGER_NAME));
+    return addFunction(fd);
+}
+
+bool ScriptEngineManager::createColumnCount()
+{
+    JSFunctionDesc fd;
+    fd.setManager(m_functionManager);
+    fd.setManagerName(LimeReport::Const::FUNCTION_MANAGER_NAME);
+    fd.setCategory(tr("GENERAL"));
+    fd.setName("getColumnCount");
+    fd.setDescription("getColumnCount(\"" + tr("datasourceName") + "\")");
+    fd.setScriptWrapper(QString("function getColumnCount(datasourceName){"
+                                "return %1.getColumnCount(datasourceName);}")
+                            .arg(LimeReport::Const::FUNCTION_MANAGER_NAME));
+    return addFunction(fd);
+}
+
 ScriptEngineManager::ScriptEngineManager()
     :m_model(0), m_context(0), m_dataManager(0)
 {
@@ -1114,6 +1187,11 @@ ScriptEngineManager::ScriptEngineManager()
     createAddTableOfContentsItemFunction();
     createClearTableOfContentsFunction();
     createReopenDatasourceFunction();
+    createGetFieldByRowIndexEx();
+    createGetFieldByRowIndexEx2();
+    createHeaderData();
+    createHeaderColumnNameByIndex();
+    createColumnCount();
 
     m_model = new ScriptEngineModel(this);
 }
@@ -1866,6 +1944,36 @@ QFont ScriptFunctionsManager::font(const QString &family, int pointSize, bool it
     return result;
 }
 
+QVariant ScriptFunctionsManager::getFieldByRowIndexEx(const QString &fieldName, int rowIndex, const int role)
+{
+    DataSourceManager *dm = scriptEngineManager()->dataManager();
+    return dm->fieldDataByRowIndex(fieldName, rowIndex, role);
+}
+
+QVariant ScriptFunctionsManager::getFieldByRowIndexEx2(const QString &fieldName, int rowIndex, const QString &roleName)
+{
+    DataSourceManager *dm = scriptEngineManager()->dataManager();
+    return dm->fieldDataByRowIndex(fieldName, rowIndex, roleName);
+}
+
+QVariant ScriptFunctionsManager::getHeaderData(const QString &fieldName, const QString &roleName)
+{
+    DataSourceManager *dm = scriptEngineManager()->dataManager();
+    return dm->headerData(fieldName, roleName);
+}
+
+QVariant ScriptFunctionsManager::getHeaderColumnNameByIndex(const QString &datasourceName, const int columnIndex)
+{
+    DataSourceManager *dm = scriptEngineManager()->dataManager();
+    return dm->columnName(datasourceName, columnIndex);
+}
+
+int ScriptFunctionsManager::getColumnCount(const QString &datasourceName)
+{
+    DataSourceManager *dm = scriptEngineManager()->dataManager();
+    return dm->columnCount(datasourceName);
+}
+
 #ifdef USE_QJSENGINE
 
 void ScriptFunctionsManager::addItemsToComboBox(QJSValue object, const QStringList &values)

limereport/lrscriptenginemanager.h

@@ -378,6 +378,43 @@ public:
     Q_INVOKABLE void     addTableOfContentsItem(const QString& uniqKey, const QString& content, int indent = 0);
     Q_INVOKABLE void     clearTableOfContents();
     Q_INVOKABLE QFont    font(const QString& family, int pointSize = -1, bool bold = false, bool italic = false, bool underLine = false);
+    /*!
+     * \brief getFieldByRowIndexEx Выдает для поля значение заданной роли
+     * \param fieldName имя источника данных + имя поля
+     * \param rowIndex индекс строки
+     * \param role код роли
+     * \return
+    */
+    Q_INVOKABLE QVariant getFieldByRowIndexEx(const QString &fieldName, int rowIndex, const int role);
+    /*!
+     * \brief getFieldByRowIndexEx2 Выдает для поля значение заданной роли
+     * \param fieldName имя источника данных + имя поля
+     * \param rowIndex индекс строки
+     * \param roleName имя роли из roleNames()
+     * \return
+    */
+    Q_INVOKABLE QVariant getFieldByRowIndexEx2(const QString &fieldName, int rowIndex, const QString &roleName);
+    /*!
+     * \brief getHeaderData Выдает для поля заголовка значение заданной роли
+     * \param fieldName имя источника данных + имя поля
+     * \param role имя роли из roleNames()
+     * \return
+    */
+    Q_INVOKABLE QVariant getHeaderData(const QString &fieldName, const QString &roleName);
+    /*!
+     * \brief getHeaderColumnNameByIndex Выдает имя колонки по ее индексу (имя используемое LR)
+     * \param datasourceName имя источника данных
+     * \param columnIndex индекс колонки
+     * \return
+    */
+    Q_INVOKABLE QVariant getHeaderColumnNameByIndex(const QString &datasourceName, const int columnIndex);
+    /*!
+     * \brief getColumnCount Выдает число столбцов в источнике данных
+     * \param datasourceName имя источника данных
+     * \return возможно -1 при ошибке
+    */
+    Q_INVOKABLE int getColumnCount(const QString &datasourceName);
+
 #ifdef USE_QJSENGINE
     Q_INVOKABLE void addItemsToComboBox(QJSValue object, const QStringList& values);
     Q_INVOKABLE void addItemToComboBox(QJSValue object, const QString& value);
@@ -506,6 +543,12 @@ private:
     bool createAddTableOfContentsItemFunction();
     bool createClearTableOfContentsFunction();
     bool createReopenDatasourceFunction();
+    bool createGetFieldByRowIndexEx();
+    bool createGetFieldByRowIndexEx2();
+    bool createHeaderData();
+    bool createHeaderColumnNameByIndex();
+    bool createColumnCount();
+
 private:
     ScriptEngineManager();
     ScriptEngineType*  m_scriptEngine;