xibs: open them as native files

platform/lang-impl/src/com/intellij/codeInsight/navigation/NavigationUtil.java

@@ -23,6 +23,7 @@ import com.intellij.navigation.NavigationItem;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.fileEditor.FileEditor;
 import com.intellij.openapi.fileEditor.FileEditorManager;
+import com.intellij.openapi.fileEditor.OpenFileHelper;
 import com.intellij.openapi.fileEditor.TextEditor;
 import com.intellij.openapi.fileEditor.impl.EditorHistoryManager;
 import com.intellij.openapi.ui.popup.JBPopup;
@@ -89,11 +90,18 @@ public final class NavigationUtil {
   }
 
   public static void activateFileWithPsiElement(@NotNull PsiElement elt) {
-    if (!activatePsiElementIfOpen(elt)) {
+    boolean openAsNative = false;
+    if (elt instanceof PsiFile) {
+      VirtualFile virtualFile = ((PsiFile)elt).getVirtualFile();
+      openAsNative = OpenFileHelper.openAsNative(virtualFile);
+    }
+    if (openAsNative || !activatePsiElementIfOpen(elt)) {
       ((NavigationItem)elt).navigate(true);
     }
   }
 
+
+
   private static boolean activatePsiElementIfOpen(@NotNull PsiElement elt) {
     if (!elt.isValid()) return false;
     elt = elt.getNavigationElement();

platform/lang-impl/src/com/intellij/openapi/fileTypes/impl/NativeFileIconProvider.java

@@ -17,6 +17,7 @@
 package com.intellij.openapi.fileTypes.impl;
 
 import com.intellij.ide.FileIconProvider;
+import com.intellij.openapi.fileEditor.OpenFileHelper;
 import com.intellij.openapi.fileTypes.NativeFileType;
 import com.intellij.openapi.fileTypes.UnknownFileType;
 import com.intellij.openapi.project.Project;
@@ -92,7 +93,7 @@ public class NativeFileIconProvider implements FileIconProvider {
   }
 
   protected boolean isNativeFileType(VirtualFile file) {
-    return ElementBase.isNativeFileType(file.getFileType());
+    return OpenFileHelper.openAsNative(file) || ElementBase.isNativeFileType(file.getFileType());
   }
 
   private static class Ext extends ComparableObject.Impl {

platform/platform-api/src/com/intellij/openapi/fileEditor/OpenFileDescriptor.java

@@ -119,7 +119,12 @@ public class OpenFileDescriptor implements Navigatable {
     FileType type = FileTypeManager.getInstance().getKnownFileTypeOrAssociate(myFile);
     if (type == null || !myFile.isValid()) return false;
 
-    if (type instanceof NativeFileType) {
+    boolean openAsNative = OpenFileHelper.openAsNative(myFile);
+
+    if (!openAsNative) {
+      openAsNative = type instanceof NativeFileType;
+    }
+    if (openAsNative) {
       return NativeFileType.openAssociatedApplication(myFile);
     }
 

platform/platform-api/src/com/intellij/openapi/fileEditor/OpenFileHelper.java

@@ -0,0 +1,25 @@
+package com.intellij.openapi.fileEditor;
+
+import com.intellij.openapi.extensions.ExtensionPointName;
+import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.vfs.VirtualFile;
+
+public abstract class OpenFileHelper {
+
+  public static boolean openAsNative(VirtualFile virtualFile) {
+    boolean openAsNative = false;
+    for (OpenFileHelper h : Extensions.getExtensions(EP_NAME)) {
+      if (h.canHelp(virtualFile)) {
+        openAsNative = h.doOpenAsNative(virtualFile);
+        break;
+      }
+    }
+    return openAsNative;
+  }
+
+  public static ExtensionPointName<OpenFileHelper> EP_NAME = ExtensionPointName.create("com.intellij.openFileDescriptorHelper");
+
+  public abstract boolean canHelp(VirtualFile file);
+
+  public abstract boolean doOpenAsNative(VirtualFile file);
+}

platform/platform-resources/src/META-INF/PlatformExtensionPoints.xml

@@ -112,4 +112,6 @@
   <extensionPoint name="statistics.usagesCollector" interface="com.intellij.internal.statistic.UsagesCollector"/>
 
   <extensionPoint name="xmlRpcHandler" beanClass="com.intellij.ide.XmlRpcHandlerBean"/>
+
+  <extensionPoint name="openFileDescriptorHelper" interface="com.intellij.openapi.fileEditor.OpenFileHelper"/>
 </extensionPoints>