Installation folder check both at startup and when user attempts to change

sketchbook location. Fixes #2719

Author: Federico Fissore

app/src/cc/arduino/view/preferences/Preferences.java

@@ -39,6 +39,7 @@
 import java.awt.event.ActionListener;
 import java.awt.event.WindowEvent;
 import java.io.File;
+import java.util.*;
 
 import static processing.app.I18n._;
 
@@ -588,6 +589,12 @@ private void cancelButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-
   }//GEN-LAST:event_cancelButtonActionPerformed
 
   private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okButtonActionPerformed
+    java.util.List<String> errors = validateData();
+    if (!errors.isEmpty()) {
+      Base.showWarning(_("Error"), errors.get(0), null);
+      return;
+    }
+
     savePreferencesData();
     for (Editor editor : base.getEditors()) {
       editor.applyPreferences();
@@ -619,6 +626,14 @@ private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRS
   private javax.swing.JCheckBox verifyUploadBox;
   // End of variables declaration//GEN-END:variables
 
+  private java.util.List<String> validateData() {
+    java.util.List<String> errors = new LinkedList<String>();
+    if (FileUtils.isSubDirectory(new File(sketchbookLocationField.getText()), new File(PreferencesData.get("runtime.ide.path")))) {
+      errors.add(_("The specified sketchbook folder contains your copy of the IDE.\nPlease choose a different folder for your sketchbook."));
+    }
+    return errors;
+  }
+
   private void savePreferencesData() {
     String oldPath = PreferencesData.get("sketchbook.path");
     String newPath = sketchbookLocationField.getText();

app/src/processing/app/Base.java

@@ -274,6 +274,8 @@ public Base(String[] args) throws Exception {
     BaseNoGui.notifier = new GUIUserNotifier(this);
     this.recentSketchesMenuItems = new LinkedList<JMenuItem>();
 
+    BaseNoGui.checkInstallationFolder();
+
     String sketchbookPath = BaseNoGui.getSketchbookPath();
 
     // If no path is set, get the default sketchbook folder for this platform

app/src/processing/app/helpers/GUIUserNotifier.java

@@ -48,7 +48,7 @@ public void showMessage(String title, String message) {
   public void showWarning(String title, String message, Exception e) {
     if (title == null) title = _("Warning");
 
-    JOptionPane.showMessageDialog(new Frame(), message, title,
+    JOptionPane.showMessageDialog(base.getActiveEditor(), message, title,
                                   JOptionPane.WARNING_MESSAGE);
 
     if (e != null) e.printStackTrace();

arduino-core/src/processing/app/BaseNoGui.java

@@ -754,10 +754,33 @@ static public void main(String args[]) throws Exception {
     initPortableFolder();
 
     initParameters(args);
-    
+
+    checkInstallationFolder();
+
     init(args);
   }
 
+  public static void checkInstallationFolder() {
+    if (isIDEInstalledIntoSettingsFolder()) {
+      showError(_("Incorrect IDE installation folder"), _("Your copy of the IDE is installed in a subfolder of your settings folder.\nPlease move the IDE to another folder."), 10);
+    }
+    if (isIDEInstalledIntoSketchbookFolder()) {
+      showError(_("Incorrect IDE installation folder"), _("Your copy of the IDE is installed in a subfolder of your sketchbook.\nPlease move the IDE to another folder."), 10);
+    }
+  }
+
+  public static boolean isIDEInstalledIntoSketchbookFolder() {
+    return PreferencesData.has("sketchbook.path") && FileUtils.isSubDirectory(new File(PreferencesData.get("sketchbook.path")), new File(PreferencesData.get("runtime.ide.path")));
+  }
+
+  public static boolean isIDEInstalledIntoSettingsFolder() {
+    try {
+      return FileUtils.isSubDirectory(BaseNoGui.getPlatform().getSettingsFolder(), new File(PreferencesData.get("runtime.ide.path")));
+    } catch (Exception e) {
+      return false;
+    }
+  }
+
   static public void onBoardOrPortChange() {
     examplesFolder = getContentFile("examples");
     toolsFolder = getContentFile("tools");