SQL editor listener model

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditor.java

@@ -1,6 +1,6 @@
 /*
  * DBeaver - Universal Database Manager
- * Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
+ * Copyright (C) 2010-2018 Serge Rider (serge@jkiss.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -191,6 +191,8 @@ public class SQLEditor extends SQLEditorBase implements
     private Map<SQLPresentationPanelDescriptor, SQLEditorPresentationPanel> extraPresentationPanels = new HashMap<>();
     private SQLEditorPresentationPanel extraPresentationCurrentPanel;
 
+    private final List<SQLEditorListener> listeners = new ArrayList<>();
+
     public SQLEditor()
     {
         super();
@@ -357,6 +359,18 @@ private void releaseContainer() {
         }
     }
 
+    public void addListener(SQLEditorListener listener) {
+        synchronized (listeners) {
+            listeners.add(listener);
+        }
+    }
+
+    public void removeListener(SQLEditorListener listener) {
+        synchronized (listeners) {
+            listeners.remove(listener);
+        }
+    }
+
     private class OutputLogWriter extends Writer {
         @Override
         public void write(@NotNull final char[] cbuf, final int off, final int len) {
@@ -1181,6 +1195,13 @@ public void setFocus()
 
     public void explainQueryPlan()
     {
+        // Notify listeners
+        synchronized (listeners) {
+            for (SQLEditorListener listener : listeners) {
+                listener.beforeQueryPlanExplain();
+            }
+        }
+
         final SQLScriptElement scriptElement = extractActiveQuery();
         if (scriptElement == null) {
             setStatus(CoreMessages.editors_sql_status_empty_query_string, DBPMessageType.ERROR);
@@ -1269,6 +1290,14 @@ public void processSQL(boolean newTab, boolean script, SQLQueryTransformer trans
             setStatus(CoreMessages.editors_sql_status_cant_obtain_document, DBPMessageType.ERROR);
             return;
         }
+
+        // Notify listeners
+        synchronized (listeners) {
+            for (SQLEditorListener listener : listeners) {
+                listener.beforeQueryExecute(script, newTab);
+            }
+        }
+
         List<SQLScriptElement> elements;
         if (script) {
             // Execute all SQL statements consequently
@@ -1554,6 +1583,10 @@ public void beforeDisconnect()
     @Override
     public void dispose()
     {
+        if (extraPresentation != null) {
+            extraPresentation.dispose();
+            extraPresentation = null;
+        }
         // Release ds container
         releaseContainer();
         closeAllJobs();

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditorListener.java

@@ -0,0 +1,40 @@
+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2018 Serge Rider (serge@jkiss.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jkiss.dbeaver.ui.editors.sql;
+
+import org.jkiss.dbeaver.model.DBPDataSourceContainer;
+import org.jkiss.dbeaver.model.sql.SQLQuery;
+
+/**
+ * SQLEditorListener
+ *
+ * @author Serge Rider
+ */
+public interface SQLEditorListener
+{
+    void onConnect(DBPDataSourceContainer container);
+
+    void onDisconnect(DBPDataSourceContainer container);
+
+    void beforeQueryExecute(boolean script, boolean newTabs);
+
+    void afterQueryExecute(boolean script, boolean newTabs);
+
+    void onQueryChange(SQLQuery oldQuery, SQLQuery newQuery);
+
+    void beforeQueryPlanExplain();
+}

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditorListenerDefault.java

@@ -0,0 +1,56 @@
+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2018 Serge Rider (serge@jkiss.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jkiss.dbeaver.ui.editors.sql;
+
+import org.jkiss.dbeaver.model.DBPDataSourceContainer;
+import org.jkiss.dbeaver.model.sql.SQLQuery;
+
+/**
+ * SQLEditorListenerDefault
+ */
+public class SQLEditorListenerDefault implements SQLEditorListener
+{
+    @Override
+    public void onConnect(DBPDataSourceContainer container) {
+
+    }
+
+    @Override
+    public void onDisconnect(DBPDataSourceContainer container) {
+
+    }
+
+    @Override
+    public void beforeQueryExecute(boolean script, boolean newTabs) {
+
+    }
+
+    @Override
+    public void afterQueryExecute(boolean script, boolean newTabs) {
+
+    }
+
+    @Override
+    public void onQueryChange(SQLQuery oldQuery, SQLQuery newQuery) {
+
+    }
+
+    @Override
+    public void beforeQueryPlanExplain() {
+
+    }
+}

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditorPresentation.java

@@ -22,6 +22,8 @@ public interface SQLEditorPresentation {
 
     void createPresentation(Composite parent, SQLEditor editor);
 
+    void dispose();
+
     enum ActivationType {
         HIDDEN,
         VISIBLE,