Fix Issues introduced by PR eclipse-platform#2051

Fixes eclipse-platform#2600

Author: lathapatil

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/SurroundWithBracketsStrategy.java

@@ -36,7 +36,7 @@ public SurroundWithBracketsStrategy(ISourceViewer sourceViewer) {
 
 	@Override
 	public void customizeDocumentCommand(IDocument document, DocumentCommand command) {
-		if (bracketsMap.containsKey(command.text)) {
+		if (command.text != null && bracketsMap.containsKey(command.text)) {
 			try {
 				ITextSelection selection= (ITextSelection) sourceViewer.getSelectionProvider().getSelection();
 				if (selection != null && selection.getLength() > 0) {
@@ -51,12 +51,7 @@ public void customizeDocumentCommand(IDocument document, DocumentCommand command
 					command.shiftsCaret= false;
 
 					// Run this in a UI thread asynchronously to ensure the selection is updated correctly
-					sourceViewer.getTextWidget().getDisplay().asyncExec(new Runnable() {
-						@Override
-						public void run() {
-							sourceViewer.setSelectedRange(command.offset + 1, selectedText.length());
-						}
-					});
+					sourceViewer.getTextWidget().getDisplay().asyncExec(() -> sourceViewer.setSelectedRange(command.offset + 1, selectedText.length()));
 				}
 			} catch (BadLocationException e) {
 				SWT.error(SWT.ERROR_INVALID_ARGUMENT);

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/SourceViewer.java

@@ -19,7 +19,6 @@
 package org.eclipse.jface.text.source;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Stack;
@@ -59,7 +58,6 @@
 import org.eclipse.jface.text.ITextViewerLifecycle;
 import org.eclipse.jface.text.Position;
 import org.eclipse.jface.text.Region;
-import org.eclipse.jface.text.SurroundWithBracketsStrategy;
 import org.eclipse.jface.text.TextViewer;
 import org.eclipse.jface.text.codemining.ICodeMiningProvider;
 import org.eclipse.jface.text.contentassist.IContentAssistant;
@@ -546,12 +544,7 @@ public void configure(SourceViewerConfiguration configuration) {
 		String[] types= configuration.getConfiguredContentTypes(this);
 		for (String t : types) {
 
-			IAutoEditStrategy[] autoEditStrategies= configuration.getAutoEditStrategies(this, t);
-			List<IAutoEditStrategy> autoEditStrategiesList= new ArrayList<>(Arrays.asList(autoEditStrategies));
-			autoEditStrategiesList.add(new SurroundWithBracketsStrategy(this));
-			IAutoEditStrategy[] newStrategies= autoEditStrategiesList.toArray(new IAutoEditStrategy[0]);
-
-			doSetAutoEditStrategies(newStrategies, t);
+			doSetAutoEditStrategies(configuration.getAutoEditStrategies(this, t), t);
 			setTextDoubleClickStrategy(configuration.getDoubleClickStrategy(this, t), t);
 
 			int[] stateMasks= configuration.getConfiguredTextHoverStateMasks(this, t);

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/SourceViewerConfiguration.java

@@ -15,6 +15,7 @@
 package org.eclipse.jface.text.source;
 
 
+import java.util.ArrayList;
 import java.util.Arrays;
 
 import org.eclipse.swt.SWT;
@@ -30,6 +31,7 @@
 import org.eclipse.jface.text.ITextHover;
 import org.eclipse.jface.text.ITextViewerExtension2;
 import org.eclipse.jface.text.IUndoManager;
+import org.eclipse.jface.text.SurroundWithBracketsStrategy;
 import org.eclipse.jface.text.TextViewerUndoManager;
 import org.eclipse.jface.text.codemining.ICodeMiningProvider;
 import org.eclipse.jface.text.contentassist.IContentAssistant;
@@ -190,7 +192,11 @@ public org.eclipse.jface.text.IAutoIndentStrategy getAutoIndentStrategy(ISourceV
 	 * @since 3.1
 	 */
 	public IAutoEditStrategy[] getAutoEditStrategies(ISourceViewer sourceViewer, String contentType) {
-		return new IAutoEditStrategy[] { getAutoIndentStrategy(sourceViewer, contentType) };
+
+		IAutoEditStrategy[] autoEditStrategies= new IAutoEditStrategy[] { getAutoIndentStrategy(sourceViewer, contentType) };
+		ArrayList<IAutoEditStrategy> autoEditStrategiesList= new ArrayList<>(Arrays.asList(autoEditStrategies));
+		autoEditStrategiesList.add(new SurroundWithBracketsStrategy(sourceViewer));
+		return autoEditStrategiesList.toArray(new IAutoEditStrategy[0]);
 	}
 
 	/**