add preference to enable/disable line numbers

add preference to enable/disable line numbers and make font change work

app/src/processing/app/Editor.java

@@ -431,6 +431,8 @@ public class Editor extends JFrame implements RunnerListener {
     saveMenuItem.setEnabled(!external);
     saveAsMenuItem.setEnabled(!external);
     
+    textarea.setDisplayLineNumbers(Preferences.getBoolean("editor.linenumbers"));
+
     TextAreaPainter painter = textarea.getPainter();
     if (external) {
       // disable line highlight and turn off the caret when disabling
@@ -450,6 +452,7 @@ public class Editor extends JFrame implements RunnerListener {
     // apply changes to the font size for the editor
     //TextAreaPainter painter = textarea.getPainter();
     painter.setFont(Preferences.getFont("editor.font"));
+    textarea.setLineNumbersFont(Preferences.getFont("editor.font"));
     //Font font = painter.getFont();
     //textarea.getPainter().setFont(new Font("Courier", Font.PLAIN, 36));
 

app/src/processing/app/Preferences.java

@@ -177,6 +177,7 @@ public class Preferences {
   JCheckBox exportSeparateBox;
   JCheckBox verboseCompilationBox;
   JCheckBox verboseUploadBox;
+  JCheckBox displayLineNumbersBox;
   JCheckBox verifyUploadBox;
   JCheckBox externalEditorBox;
   JCheckBox memoryOverrideBox;
@@ -380,6 +381,15 @@ public class Preferences {
     pain.add(box);
     d = box.getPreferredSize();
     box.setBounds(left, top, d.width, d.height);
+    top += d.height + GUI_BETWEEN;
+
+	// [ ] Display line numbers
+    
+    displayLineNumbersBox = new JCheckBox(_("Display line numbers"));
+    pain.add(displayLineNumbersBox);
+    d = displayLineNumbersBox.getPreferredSize();
+    displayLineNumbersBox.setBounds(left, top, d.width + 10, d.height);
+    right = Math.max(right, left + d.width);
     top += d.height + GUI_BETWEEN;
 	
     // [ ] Verify code after upload
@@ -571,6 +581,7 @@ public class Preferences {
     // put each of the settings into the table
     setBoolean("build.verbose", verboseCompilationBox.isSelected());
     setBoolean("upload.verbose", verboseUploadBox.isSelected());
+    setBoolean("editor.linenumbers", displayLineNumbersBox.isSelected());
     setBoolean("upload.verify", verifyUploadBox.isSelected());
     
 //    setBoolean("sketchbook.closing_last_window_quits",
@@ -634,6 +645,7 @@ public class Preferences {
     // set all settings entry boxes to their actual status
     verboseCompilationBox.setSelected(getBoolean("build.verbose"));
     verboseUploadBox.setSelected(getBoolean("upload.verbose"));
+    displayLineNumbersBox.setSelected(getBoolean("editor.linenumbers"));
     verifyUploadBox.setSelected(getBoolean("upload.verify"));
 
     //closingLastQuitsBox.

app/src/processing/app/syntax/JEditTextArea.java

@@ -87,7 +87,7 @@ public class JEditTextArea extends JComponent
 
     // Initialize some misc. stuff
     painter = new TextAreaPainter(this,defaults);
-    editorLineNumbers = new TextAreaLineNumbers(defaults.font, defaults.bgcolor, defaults.fgcolor, (int) painter.getPreferredSize().getHeight());
+    editorLineNumbers = new TextAreaLineNumbers(defaults, (int) painter.getPreferredSize().getHeight());
     documentHandler = new DocumentHandler();
     eventListenerList = new EventListenerList();
     caretEvent = new MutableCaretEvent();
@@ -2427,4 +2427,12 @@ public class JEditTextArea extends JComponent
     caretTimer.setInitialDelay(500);
     caretTimer.start();
   }
+
+  public void setDisplayLineNumbers(boolean displayLineNumbers) {
+    editorLineNumbers.setDisplayLineNumbers(displayLineNumbers);
+  }
+
+  public void setLineNumbersFont(Font font) {
+    editorLineNumbers.setTextFont(font);
+  }
 }

app/src/processing/app/syntax/TextAreaLineNumbers.java

@@ -16,9 +16,12 @@ import java.awt.Rectangle;
 
 import javax.swing.JTextPane;
 import javax.swing.border.MatteBorder;
+import javax.swing.text.AttributeSet;
 import javax.swing.text.SimpleAttributeSet;
 import javax.swing.text.StyleConstants;
 
+import processing.app.Preferences;
+
 public class TextAreaLineNumbers extends JTextPane {
   
   private final int LEFT_INDENT = 6;
@@ -34,20 +37,14 @@ public class TextAreaLineNumbers extends JTextPane {
   private int currEndNum = 0;
   private int currNumDigits = MIN_NUM_DIGITS;
   
-  public TextAreaLineNumbers(Font font, Color bgcolor, Color fgcolor, int preferredHeight) {
-    setFont(font);
-    setBackground(bgcolor);
-    setForeground(fgcolor);
+  public TextAreaLineNumbers(TextAreaDefaults defaults, int preferredHeight) {
+    setBackground(defaults.bgcolor);
+    setForeground(defaults.fgcolor);
     setOpaque(true);
     setEditable(false);
     setEnabled(false);
     setBorder(new MatteBorder(0, 0, 0, 1, new Color(240, 240, 240)));
-
-    SimpleAttributeSet attribs = new SimpleAttributeSet();  
-    StyleConstants.setAlignment(attribs , StyleConstants.ALIGN_RIGHT);
-    StyleConstants.setLeftIndent(attribs , 6);
-    StyleConstants.setRightIndent(attribs , 6);  
-    setParagraphAttributes(attribs,true); 
+    setTextFont(Preferences.getFont("editor.font")); 
     
     DIGIT_WIDTH = getFontMetrics(getFont()).stringWidth("0");
     MIN_WIDTH = DIGIT_WIDTH * MIN_NUM_DIGITS + PADDING_WIDTH;
@@ -55,6 +52,16 @@ public class TextAreaLineNumbers extends JTextPane {
     setPreferredSize(new Dimension(MIN_WIDTH, preferredHeight));
   }
 
+  public void setTextFont(Font font) {
+    setFont(font);
+    SimpleAttributeSet attribs = new SimpleAttributeSet();  
+    StyleConstants.setAlignment(attribs , StyleConstants.ALIGN_RIGHT);
+    StyleConstants.setLeftIndent(attribs , 6);
+    StyleConstants.setRightIndent(attribs , 6);
+    StyleConstants.setFontSize(attribs, getFont().getSize());
+    setParagraphAttributes(attribs,true);
+  }
+  
   public void updateLineNumbers(int startNum, int endNum) {
     if (currStartNum == startNum && currEndNum == endNum) {
       return;
@@ -78,8 +85,21 @@ public class TextAreaLineNumbers extends JTextPane {
     }
     currNumDigits = numDigits;
     
-    setBounds(new Rectangle(Math.max(MIN_WIDTH, DIGIT_WIDTH * numDigits + PADDING_WIDTH), getHeight()));
+    updateBounds();
     invalidate();
   }
 
+  public void setDisplayLineNumbers(boolean displayLineNumbers) {
+    setVisible(displayLineNumbers);
+    if (displayLineNumbers) {
+      updateBounds();
+    } else {
+      setBounds(new Rectangle(0, getHeight()));
+    }
+    invalidate();
+  }
+  
+  private void updateBounds() {
+    setBounds(new Rectangle(Math.max(MIN_WIDTH, DIGIT_WIDTH * currNumDigits + PADDING_WIDTH), getHeight()));
+  }
 }

build/shared/lib/preferences.txt

@@ -104,6 +104,9 @@ editor.caret.blink=true
 # area that's not in use by the text (replaced with tildes)
 editor.invalid=false
 
+# show line numbers in editor
+editor.linenumbers = false
+
 # enable ctrl-ins, shift-ins, shift-delete for cut/copy/paste
 # on windows and linux, but disable on the mac
 editor.keys.alternative_cut_copy_paste = true