Support tables with empty table names

Apparently SQLite supports empty table names for whatever reason. This
commit patches SQLiteBrowser to support databases with a table with an
empty name. I haven't removed the check for an empty table name in the
Create/Edit table dialog though because you probably really shouldn't
create such a table.

See issue #194.

src/EditTableDialog.cpp

@@ -10,13 +10,13 @@
 #include <QDateTime>
 #include <QKeyEvent>
 
-EditTableDialog::EditTableDialog(DBBrowserDB* db, const QString& tableName, QWidget* parent)
+EditTableDialog::EditTableDialog(DBBrowserDB* db, const QString& tableName, bool createTable, QWidget* parent)
     : QDialog(parent),
       ui(new Ui::EditTableDialog),
       pdb(db),
       curTable(tableName),
       m_table(tableName),
-      m_bNewTable(true),
+      m_bNewTable(createTable),
       m_sRestorePointName(QString("edittable_%1_save_%2").arg(curTable).arg(QDateTime::currentMSecsSinceEpoch()))
 {
     // Create UI
@@ -27,10 +27,8 @@ EditTableDialog::EditTableDialog(DBBrowserDB* db, const QString& tableName, QWid
     m_sqliteSyntaxHighlighter = new SQLiteSyntaxHighlighter(ui->sqlTextEdit->document());
 
     // Editing an existing table?
-    if(curTable != "")
+    if(m_bNewTable == false)
     {
-        m_bNewTable = false; // we are editing an existing table
-
         // Existing table, so load and set the current layout
         QString sTablesql = pdb->getObjectByName(curTable).getsql();
         m_table = sqlb::Table::parseSQL(sTablesql).first;

src/EditTableDialog.h

@@ -18,7 +18,7 @@ class EditTableDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit EditTableDialog(DBBrowserDB* pdb, const QString& tableName, QWidget* parent = 0);
+    explicit EditTableDialog(DBBrowserDB* pdb, const QString& tableName, bool createTable, QWidget* parent = 0);
     ~EditTableDialog();
 
 protected:

src/MainWindow.cpp

@@ -327,7 +327,7 @@ void MainWindow::populateStructure()
 void MainWindow::populateTable(const QString & tablename, bool bKeepFilter)
 {
     // Remove the model-view link if the table name is empty in order to remove any data from the view
-    if(tablename.isEmpty())
+    if(ui->comboBrowseTable->model()->rowCount() == 0 && tablename.isEmpty())
     {
         ui->dataTable->setModel(0);
         if(qobject_cast<FilterTableHeader*>(ui->dataTable->horizontalHeader()))
@@ -585,7 +585,7 @@ void MainWindow::createTable()
         return;
     }
 
-    EditTableDialog dialog(&db, "", this);
+    EditTableDialog dialog(&db, "", true, this);
     if(dialog.exec())
     {
         populateStructure();
@@ -651,7 +651,7 @@ void MainWindow::editTable()
     }
     QString tableToEdit = ui->dbTreeWidget->model()->data(ui->dbTreeWidget->currentIndex().sibling(ui->dbTreeWidget->currentIndex().row(), 0)).toString();
 
-    EditTableDialog dialog(&db, tableToEdit, this);
+    EditTableDialog dialog(&db, tableToEdit, false, this);
     if(dialog.exec())
     {
         populateStructure();

src/SQLiteSyntaxHighlighter.cpp

@@ -100,10 +100,13 @@ void SQLiteSyntaxHighlighter::setTableNames(const QStringList &tablenames)
 {
     tableNameRules.clear();
     foreach(const QString& tblname, tablenames) {
-        HighlightingRule rule;
-        rule.pattern = QRegExp(QString("\\b%1\\b").arg(tblname));
-        rule.format = tableFormat;
-        tableNameRules.append(rule);
+        if(!tblname.isEmpty())
+        {
+            HighlightingRule rule;
+            rule.pattern = QRegExp(QString("\\b%1\\b").arg(tblname));
+            rule.format = tableFormat;
+            tableNameRules.append(rule);
+        }
     }
 }
 

src/sqlitetablemodel.cpp

@@ -39,7 +39,7 @@ void SqliteTableModel::setTable(const QString& table)
     if(m_db->getObjectByName(table).gettype() == "table")
     {
         sqlb::Table t = sqlb::Table::parseSQL(m_db->getObjectByName(table).getsql()).first;
-        if(t.name() != "") // parsing was OK
+        if(t.fields().size()) // parsing was OK
         {
             m_headers.push_back(t.rowidColumn());
             m_headers.append(m_db->getObjectByName(table).table.fieldNames());