From ef620e5c65b5eddbd4c7632e5a8cf389525a77f6 Mon Sep 17 00:00:00 2001
From: Alexander Zolotov <alexander.zolotov@jetbrains.com>
Date: Tue, 20 Oct 2015 18:32:45 +0300
Subject: [PATCH] Check generated icons file under read action if needed

---
 .../internal/IconsGeneratedSourcesFilter.java | 24 ++++++++++++-------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/plugins/devkit/src/internal/IconsGeneratedSourcesFilter.java b/plugins/devkit/src/internal/IconsGeneratedSourcesFilter.java
index a5e8e04bd3f2..41b1678fffb5 100644
--- a/plugins/devkit/src/internal/IconsGeneratedSourcesFilter.java
+++ b/plugins/devkit/src/internal/IconsGeneratedSourcesFilter.java
@@ -15,8 +15,10 @@
  */
 package org.jetbrains.idea.devkit.internal;
 
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.GeneratedSourcesFilter;
+import com.intellij.openapi.util.Computable;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
 import com.intellij.psi.javadoc.PsiDocComment;
@@ -24,17 +26,23 @@ import org.jetbrains.annotations.NotNull;
 
 public class IconsGeneratedSourcesFilter extends GeneratedSourcesFilter {
   @Override
-  public boolean isGeneratedSource(@NotNull VirtualFile file, @NotNull Project project) {
+  public boolean isGeneratedSource(@NotNull final VirtualFile file, @NotNull final Project project) {
     if (file.getName().endsWith("Icons.java")) {
-      PsiFile psiFile = PsiManager.getInstance(project).findFile(file);
-      if (psiFile instanceof PsiJavaFile) {
-        for (PsiClass aClass : ((PsiJavaFile)psiFile).getClasses()) {
-          if (aClass.hasModifierProperty(PsiModifier.PUBLIC)) {
-            PsiDocComment comment = aClass.getDocComment();
-            return comment != null && comment.getText().contains("run build/scripts/icons.gant instead");
+      return ApplicationManager.getApplication().runReadAction(new Computable<Boolean>() {
+        @Override
+        public Boolean compute() {
+          PsiFile psiFile = PsiManager.getInstance(project).findFile(file);
+          if (psiFile instanceof PsiJavaFile) {
+            for (PsiClass aClass : ((PsiJavaFile)psiFile).getClasses()) {
+              if (aClass.hasModifierProperty(PsiModifier.PUBLIC)) {
+                PsiDocComment comment = aClass.getDocComment();
+                return comment != null && comment.getText().contains("run build/scripts/icons.gant instead");
+              }
+            }
           }
+          return false;
         }
-      }
+      });
     }
     return false;
   }