From 701d66ecfc53c82e19da9d2178316bde9148a70f Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 17 Oct 2012 20:01:55 +0200
Subject: [PATCH] IDEA-93059 "Open" action does nothing if you select a
 directory which doesn't have .idea under it

---
 .../src/com/intellij/openapi/ui/Messages.java            | 2 +-
 .../src/com/intellij/ide/actions/OpenFileAction.java     | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/platform/platform-api/src/com/intellij/openapi/ui/Messages.java b/platform/platform-api/src/com/intellij/openapi/ui/Messages.java
index 47ac3cbdd30b..8e06c6053b4b 100644
--- a/platform/platform-api/src/com/intellij/openapi/ui/Messages.java
+++ b/platform/platform-api/src/com/intellij/openapi/ui/Messages.java
@@ -819,7 +819,7 @@ public class Messages {
   /**
    * Shows dialog with given message and title, information icon {@link #getInformationIcon()} and OK button
    */
-  public static void showInfoMessage(Project project, @Nls String message, @Nls String title) {
+  public static void showInfoMessage(@Nullable Project project, @Nls String message, @Nls String title) {
     if (canShowMacSheetPanel()) {
       MacMessages.getInstance().showOkMessageDialog(title, message, OK_BUTTON, WindowManager.getInstance().suggestParentWindow(project));
       return;
diff --git a/platform/platform-impl/src/com/intellij/ide/actions/OpenFileAction.java b/platform/platform-impl/src/com/intellij/ide/actions/OpenFileAction.java
index 0a8cd3f70c9e..0902a83ebbc9 100644
--- a/platform/platform-impl/src/com/intellij/ide/actions/OpenFileAction.java
+++ b/platform/platform-impl/src/com/intellij/ide/actions/OpenFileAction.java
@@ -88,6 +88,15 @@ public class OpenFileAction extends AnAction implements DumbAware {
     FileChooser.chooseFiles(descriptor, project, userHomeDir, new Consumer<List<VirtualFile>>() {
       @Override
       public void consume(final List<VirtualFile> files) {
+        for (VirtualFile file : files) {
+          if (!descriptor.isFileSelectable(file)) { // on Mac, it could be selected anyway
+            Messages.showInfoMessage(project,
+                                     file.getPresentableUrl() + " contains no " +
+                                     ApplicationNamesInfo.getInstance().getFullProductName() + " project",
+                                     "Cannot Open Project");
+            return;
+          }
+        }
         doOpenFile(project, files);
       }
     });