5 files changed, 116 insertions, 0 deletions
diff --git a/SQLiteStudio3/coreSQLiteStudio/common/global.h b/SQLiteStudio3/coreSQLiteStudio/common/global.h
index bc228ca..b1f4b01 100644
--- a/SQLiteStudio3/coreSQLiteStudio/common/global.h
+++ b/SQLiteStudio3/coreSQLiteStudio/common/global.h
@@ -32,6 +32,13 @@
         var = nullptr; \
     }
 
+#define qobject_safe_delete(var) \
+    if (var) \
+    { \
+        var->deleteLater(); \
+        var = nullptr; \
+    }
+
 #define static_char static constexpr const char
 
 #define static_qstring(N,V) const static QString N = QStringLiteral(V)
diff --git a/SQLiteStudio3/coreSQLiteStudio/common/signalwait.cpp b/SQLiteStudio3/coreSQLiteStudio/common/signalwait.cpp
new file mode 100644
index 0000000..90f9075
--- /dev/null
+++ b/SQLiteStudio3/coreSQLiteStudio/common/signalwait.cpp
@@ -0,0 +1,29 @@
+#include "signalwait.h"
+#include <QCoreApplication>
+#include <QTime>
+
+SignalWait::SignalWait(QObject* object, const char* signal) :
+    QObject()
+{
+    connect(object, signal, this, SLOT(handleSignal()));
+}
+
+bool SignalWait::wait(int msTimeout)
+{
+    QTime timer(0, 0, 0, msTimeout);
+    timer.start();
+    while (!called && timer.elapsed() < msTimeout)
+        qApp->processEvents(QEventLoop::ExcludeUserInputEvents);
+
+    return called;
+}
+
+void SignalWait::reset()
+{
+    called = false;
+}
+
+void SignalWait::handleSignal()
+{
+    called = true;
+}
diff --git a/SQLiteStudio3/coreSQLiteStudio/common/signalwait.h b/SQLiteStudio3/coreSQLiteStudio/common/signalwait.h
new file mode 100644
index 0000000..7b7b903
--- /dev/null
+++ b/SQLiteStudio3/coreSQLiteStudio/common/signalwait.h
@@ -0,0 +1,23 @@
+#ifndef SIGNALWAIT_H
+#define SIGNALWAIT_H
+
+#include <QObject>
+
+class SignalWait : public QObject
+{
+        Q_OBJECT
+
+    public:
+        SignalWait(QObject *object, const char *signal);
+
+        bool wait(int msTimeout);
+        void reset();
+
+    private:
+        bool called = false;
+
+    private slots:
+        void handleSignal();
+};
+
+#endif // SIGNALWAIT_H
diff --git a/SQLiteStudio3/coreSQLiteStudio/common/table.cpp b/SQLiteStudio3/coreSQLiteStudio/common/table.cpp
index c590995..a9b0f16 100644
--- a/SQLiteStudio3/coreSQLiteStudio/common/table.cpp
+++ b/SQLiteStudio3/coreSQLiteStudio/common/table.cpp
@@ -50,3 +50,43 @@ int qHash(Table table)
 {
     return qHash(table.getDatabase() + "." + table.getTable());
 }
+
+AliasedTable::AliasedTable()
+{
+}
+
+AliasedTable::AliasedTable(const QString& database, const QString& table, const QString& alias) :
+    Table(database, table)
+{
+    setTableAlias(alias);
+}
+
+AliasedTable::AliasedTable(const AliasedTable& other) :
+    Table(other.database, other.table)
+{
+    tableAlias = other.tableAlias;
+}
+
+AliasedTable::~AliasedTable()
+{
+}
+
+int AliasedTable::operator ==(const AliasedTable& other) const
+{
+    return other.database == this->database && other.table == this->table && other.tableAlias == this->tableAlias;
+}
+
+QString AliasedTable::getTableAlias() const
+{
+    return tableAlias;
+}
+
+void AliasedTable::setTableAlias(const QString& value)
+{
+    tableAlias = value;
+}
+
+int qHash(AliasedTable table)
+{
+    return qHash(table.getDatabase() + "." + table.getTable() + " " + table.getTableAlias());
+}
diff --git a/SQLiteStudio3/coreSQLiteStudio/common/table.h b/SQLiteStudio3/coreSQLiteStudio/common/table.h
index d17a729..5cc4570 100644
--- a/SQLiteStudio3/coreSQLiteStudio/common/table.h
+++ b/SQLiteStudio3/coreSQLiteStudio/common/table.h
@@ -23,10 +23,27 @@ class API_EXPORT Table
     protected:
         QString database;
         QString table;
+};
+
+class API_EXPORT AliasedTable : public Table
+{
+    public:
+        AliasedTable();
+        AliasedTable(const QString& database, const QString& table, const QString& alias);
+        AliasedTable(const AliasedTable& other);
+        virtual ~AliasedTable();
 
+        int operator ==(const AliasedTable& other) const;
+
+        QString getTableAlias() const;
+        void setTableAlias(const QString& value);
+
+    protected:
+        QString tableAlias;
 };
 
 int API_EXPORT qHash(Table table);
+int API_EXPORT qHash(AliasedTable table);
 
 
 #endif // TABLE_H