Add font size shortcuts (menu and keyboard)

Author: gdyr

app/src/processing/app/Base.java

@@ -1839,6 +1839,17 @@ public void handlePrefs() {
     dialog.setVisible(true);
   }
 
+  /**
+   * Adjust font size
+   */
+  public void handleFontSizeChange(int change) {
+    String pieces[] = PApplet.split(PreferencesData.get("editor.font"), ',');
+    int newSize = Integer.parseInt(pieces[2]) + change;
+    pieces[2] = String.valueOf(newSize);
+    PreferencesData.set("editor.font", PApplet.join(pieces, ','));
+    this.getEditors().forEach(processing.app.Editor::applyPreferences);
+  }
+
   // XXX: Remove this method and make librariesIndexer non-static
   static public LibraryList getLibraries() {
     return BaseNoGui.librariesIndexer.getInstalledLibraries();

app/src/processing/app/Editor.java

@@ -1374,6 +1374,24 @@ public void actionPerformed(ActionEvent e) {
 
     menu.addSeparator();
 
+    JMenuItem increaseFontSizeItem = newJMenuItem(tr("Increase Font Size"), '=');
+    increaseFontSizeItem.addActionListener(new ActionListener() {
+        public void actionPerformed(ActionEvent e) {
+          base.handleFontSizeChange(1);
+        }
+    });
+    menu.add(increaseFontSizeItem);
+
+    JMenuItem decreaseFontSizeItem = newJMenuItem(tr("Decrease Font Size"), '-');
+    decreaseFontSizeItem.addActionListener(new ActionListener() {
+        public void actionPerformed(ActionEvent e) {
+          base.handleFontSizeChange(-1);
+        }
+    });
+    menu.add(decreaseFontSizeItem);
+
+    menu.addSeparator();
+
     JMenuItem findItem = newJMenuItem(tr("Find..."), 'F');
     findItem.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {