From 49913b7dad88e65bca3a0252f10cf0dd1666a75b Mon Sep 17 00:00:00 2001
From: Karl Tauber <karl@jformdesigner.com>
Date: Sat, 7 Aug 2021 12:51:00 +0200
Subject: [PATCH] Theme Editor: duplicate lines with `Ctrl+Alt+Up` or
 `Ctrl+Alt+Down`

---
 .../themeeditor/FlatSyntaxTextArea.java       | 17 +++++
 .../FlatSyntaxTextAreaActions.java            | 76 +++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextAreaActions.java

diff --git a/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextArea.java b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextArea.java
index 05f7f8b3..2b1a0ee8 100644
--- a/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextArea.java
+++ b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextArea.java
@@ -18,13 +18,20 @@ package com.formdev.flatlaf.themeeditor;
 
 import java.awt.Color;
 import java.awt.KeyboardFocusManager;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import javax.swing.ActionMap;
+import javax.swing.InputMap;
+import javax.swing.KeyStroke;
 import javax.swing.text.BadLocationException;
 import org.fife.ui.rsyntaxtextarea.TextEditorPane;
 import org.fife.ui.rsyntaxtextarea.Token;
+import org.fife.ui.rtextarea.RTextArea;
 import com.formdev.flatlaf.UIDefaultsLoaderAccessor;
+import com.formdev.flatlaf.themeeditor.FlatSyntaxTextAreaActions.DuplicateLinesAction;
 
 /**
  * A text area that supports editing FlatLaf themes.
@@ -43,6 +50,16 @@ class FlatSyntaxTextArea
 		// remove Ctrl+Tab and Ctrl+Shift+Tab focus traversal keys to allow tabbed pane to process them
 		setFocusTraversalKeys( KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, Collections.emptySet() );
 		setFocusTraversalKeys( KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, Collections.emptySet() );
+
+		ActionMap actionMap = getActionMap();
+		actionMap.put( FlatSyntaxTextAreaActions.duplicateLinesUpAction, new DuplicateLinesAction( FlatSyntaxTextAreaActions.duplicateLinesUpAction, true ) );
+		actionMap.put( FlatSyntaxTextAreaActions.duplicateLinesDownAction, new DuplicateLinesAction( FlatSyntaxTextAreaActions.duplicateLinesDownAction, false ) );
+
+		InputMap inputMap = getInputMap();
+		int defaultModifier = RTextArea.getDefaultModifier();
+		int alt = InputEvent.ALT_DOWN_MASK;
+		inputMap.put( KeyStroke.getKeyStroke( KeyEvent.VK_UP,   defaultModifier|alt), FlatSyntaxTextAreaActions.duplicateLinesUpAction );
+		inputMap.put( KeyStroke.getKeyStroke( KeyEvent.VK_DOWN, defaultModifier|alt), FlatSyntaxTextAreaActions.duplicateLinesDownAction );
 	}
 
 	boolean isUseColorOfColorTokens() {
diff --git a/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextAreaActions.java b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextAreaActions.java
new file mode 100644
index 00000000..308f12e2
--- /dev/null
+++ b/flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextAreaActions.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2021 FormDev Software GmbH
+ *
+ * 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
+ *
+ *     https://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 com.formdev.flatlaf.themeeditor;
+
+import java.awt.event.ActionEvent;
+import javax.swing.text.BadLocationException;
+import org.fife.ui.rtextarea.RTextArea;
+import org.fife.ui.rtextarea.RecordableTextAction;
+
+/**
+ * @author Karl Tauber
+ */
+class FlatSyntaxTextAreaActions
+{
+	static final String duplicateLinesUpAction = "FlatLaf.DuplicateLinesUpAction";
+	static final String duplicateLinesDownAction = "FlatLaf.DuplicateLinesDownAction";
+
+	static class DuplicateLinesAction
+		extends RecordableTextAction
+	{
+		private final boolean up;
+
+		public DuplicateLinesAction( String name, boolean up ) {
+			super( name );
+			this.up = up;
+		}
+
+		@Override
+		public void actionPerformedImpl( ActionEvent e, RTextArea textArea ) {
+			try {
+				int selStartLine = textArea.getLineOfOffset( textArea.getSelectionStart() );
+				int selEndLine = textArea.getLineOfOffset( textArea.getSelectionEnd() );
+
+				int linesStart = textArea.getLineStartOffset( selStartLine );
+				int linesEnd = textArea.getLineEndOffset( selEndLine );
+
+				String linesText = textArea.getText( linesStart, linesEnd - linesStart );
+				if( !linesText.endsWith( "\n" ) )
+					linesText += "\n";
+
+				textArea.replaceRange( linesText, linesStart, linesStart );
+
+				if( up )
+					textArea.select( linesStart, linesStart + linesText.length() - 1 );
+				else {
+					int newSelStart = linesStart + linesText.length();
+					int newSelEnd = newSelStart + linesText.length();
+					if( linesText.endsWith( "\n" ) )
+						newSelEnd--;
+					textArea.select( newSelStart, newSelEnd );
+				}
+			} catch( BadLocationException ex ) {
+				ex.printStackTrace();
+			}
+		}
+
+		@Override
+		public String getMacroID() {
+			return getName();
+		}
+	}
+}