refact: remove usage of deprecated classes

src/main/java/org/antlr/intellij/plugin/ANTLRv4PluginController.java

@@ -11,10 +11,10 @@
 import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.EditorFactory;
-import com.intellij.openapi.editor.event.EditorFactoryAdapter;
 import com.intellij.openapi.editor.event.EditorFactoryEvent;
-import com.intellij.openapi.editor.event.EditorMouseAdapter;
+import com.intellij.openapi.editor.event.EditorFactoryListener;
 import com.intellij.openapi.editor.event.EditorMouseEvent;
+import com.intellij.openapi.editor.event.EditorMouseListener;
 import com.intellij.openapi.extensions.PluginId;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
 import com.intellij.openapi.fileEditor.FileEditorManager;
@@ -26,12 +26,11 @@
 import com.intellij.openapi.progress.util.BackgroundTaskUtil;
 import com.intellij.openapi.progress.util.ProgressWindow;
 import com.intellij.openapi.project.Project;
-import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.util.Key;
 import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.openapi.vfs.VirtualFileAdapter;
 import com.intellij.openapi.vfs.VirtualFileEvent;
+import com.intellij.openapi.vfs.VirtualFileListener;
 import com.intellij.openapi.vfs.VirtualFileManager;
 import com.intellij.openapi.wm.ToolWindow;
 import com.intellij.openapi.wm.ToolWindowAnchor;
@@ -55,7 +54,6 @@
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Objects;
 
 /** This object is the controller for the ANTLR plug-in. It receives
  *  events and can send them on to its contained components. For example,
@@ -226,7 +224,7 @@ public void installListeners() {
 
 		EditorFactory factory = EditorFactory.getInstance();
 		factory.addEditorFactoryListener(
-			new EditorFactoryAdapter() {
+			new EditorFactoryListener() {
 				@Override
 				public void editorCreated(@NotNull EditorFactoryEvent event) {
 					final Editor editor = event.getEditor();
@@ -610,7 +608,7 @@ public static VirtualFile getCurrentGrammarFile(Project project) {
 		return null;
 	}
 
-	private class GrammarEditorMouseAdapter extends EditorMouseAdapter {
+	private class GrammarEditorMouseAdapter implements EditorMouseListener {
 		@Override
 		public void mouseClicked(EditorMouseEvent e) {
 			Document doc = e.getEditor().getDocument();
@@ -621,7 +619,7 @@ public void mouseClicked(EditorMouseEvent e) {
 		}
 	}
 
-	private class MyVirtualFileAdapter extends VirtualFileAdapter {
+	private class MyVirtualFileAdapter implements VirtualFileListener {
 		@Override
 		public void contentsChanged(VirtualFileEvent event) {
 			final VirtualFile vfile = event.getFile();

src/main/java/org/antlr/intellij/plugin/preview/InputPanel.java

@@ -5,13 +5,25 @@
 import com.intellij.codeInsight.hint.HintUtil;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.diagnostic.Logger;
-import com.intellij.openapi.editor.*;
+import com.intellij.openapi.editor.CaretModel;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.editor.EditorFactory;
+import com.intellij.openapi.editor.EditorSettings;
+import com.intellij.openapi.editor.LogicalPosition;
+import com.intellij.openapi.editor.ScrollType;
+import com.intellij.openapi.editor.ScrollingModel;
 import com.intellij.openapi.editor.event.CaretListener;
-import com.intellij.openapi.editor.event.DocumentAdapter;
 import com.intellij.openapi.editor.event.DocumentEvent;
+import com.intellij.openapi.editor.event.DocumentListener;
 import com.intellij.openapi.editor.ex.EditorEx;
 import com.intellij.openapi.editor.ex.EditorMarkupModel;
-import com.intellij.openapi.editor.markup.*;
+import com.intellij.openapi.editor.markup.EffectType;
+import com.intellij.openapi.editor.markup.HighlighterLayer;
+import com.intellij.openapi.editor.markup.HighlighterTargetArea;
+import com.intellij.openapi.editor.markup.MarkupModel;
+import com.intellij.openapi.editor.markup.RangeHighlighter;
+import com.intellij.openapi.editor.markup.TextAttributes;
 import com.intellij.openapi.fileChooser.FileChooserDescriptor;
 import com.intellij.openapi.fileChooser.FileChooserDescriptorFactory;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
@@ -32,8 +44,16 @@
 import org.antlr.intellij.plugin.parsing.PreviewParser;
 import org.antlr.intellij.plugin.profiler.ProfilerPanel;
 import org.antlr.runtime.CommonToken;
-import org.antlr.v4.runtime.*;
-import org.antlr.v4.runtime.atn.*;
+import org.antlr.v4.runtime.CommonTokenStream;
+import org.antlr.v4.runtime.LexerNoViableAltException;
+import org.antlr.v4.runtime.ParserRuleContext;
+import org.antlr.v4.runtime.RecognitionException;
+import org.antlr.v4.runtime.Token;
+import org.antlr.v4.runtime.atn.AmbiguityInfo;
+import org.antlr.v4.runtime.atn.ContextSensitivityInfo;
+import org.antlr.v4.runtime.atn.DecisionEventInfo;
+import org.antlr.v4.runtime.atn.LookaheadEventInfo;
+import org.antlr.v4.runtime.atn.PredicateEvalInfo;
 import org.antlr.v4.runtime.misc.Interval;
 import org.antlr.v4.runtime.misc.Pair;
 import org.antlr.v4.runtime.misc.Utils;
@@ -158,7 +178,7 @@ public void createManualInputPreviewEditor(final PreviewState previewState) {
 		final EditorFactory factory = EditorFactory.getInstance();
 		Document doc = factory.createDocument("");
 		doc.addDocumentListener(
-			new DocumentAdapter() {
+			new DocumentListener() {
 				@Override
 				public void documentChanged(DocumentEvent e) {
 					previewState.manualInputText = e.getDocument().getCharsSequence();
@@ -217,7 +237,7 @@ public Editor createPreviewEditor(final VirtualFile grammarFile, Document doc, b
 		LOG.info("createEditor: create new editor for "+grammarFile.getPath()+" "+previewPanel.project.getName());
 		final EditorFactory factory = EditorFactory.getInstance();
 		doc.addDocumentListener(
-			new DocumentAdapter() {
+			new DocumentListener() {
 				@Override
 				public void documentChanged(DocumentEvent event) {
 					previewPanel.updateParseTreeFromDoc(grammarFile);

src/main/java/org/antlr/intellij/plugin/preview/PreviewPanel.java

@@ -1,14 +1,19 @@
 package org.antlr.intellij.plugin.preview;
 
 import com.intellij.icons.AllIcons;
-import com.intellij.openapi.actionSystem.*;
+import com.intellij.openapi.actionSystem.ActionManager;
+import com.intellij.openapi.actionSystem.ActionToolbar;
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.DefaultActionGroup;
+import com.intellij.openapi.actionSystem.ToggleAction;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.Caret;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.SelectionModel;
-import com.intellij.openapi.editor.event.CaretAdapter;
 import com.intellij.openapi.editor.event.CaretEvent;
+import com.intellij.openapi.editor.event.CaretListener;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.Splitter;
 import com.intellij.openapi.util.SystemInfo;
@@ -106,7 +111,7 @@ private void createGUI() {
 		// Had to set min size / preferred size in InputPanel.form to get slider to allow left shift of divider
 		Splitter splitPane = new Splitter();
 		inputPanel = getEditorPanel();
-		inputPanel.addCaretListener(new CaretAdapter() {
+		inputPanel.addCaretListener(new CaretListener() {
 			@Override
 			public void caretPositionChanged(@NotNull CaretEvent event) {
 				Caret caret = event.getCaret();

src/main/resources/META-INF/plugin.xml

@@ -142,7 +142,8 @@ For really big files and slow grammars, there is an appreciable delay when displ
   </actions>
 
   <extensions defaultExtensionNs="com.intellij">
-      <fileTypeFactory implementation="org.antlr.intellij.plugin.ANTLRv4FileTypeFactory"/>
+      <fileType name="ANTLRv4 grammar" language="ANTLRv4" extensions="g4"
+                implementationClass="org.antlr.intellij.plugin.ANTLRv4FileType" fieldName="INSTANCE"/>
       <lang.syntaxHighlighterFactory language="ANTLRv4" implementationClass="org.antlr.intellij.plugin.ANTLRv4SyntaxHighlighterFactory"/>
       <lang.commenter language="ANTLRv4" implementationClass="org.antlr.intellij.plugin.ANTLRv4Commenter" />
       <indexPatternBuilder implementation="org.antlr.intellij.plugin.psi.ANTLRv4IndexPatternBuilder"/>