Only prepare registered icons when project indexing is finished

Author: cedricziel

src/main/java/com/cedricziel/idea/typo3/TYPO3CMSProjectComponent.java

@@ -4,6 +4,7 @@
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.components.ProjectComponent;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.project.DumbService;
 import com.intellij.openapi.project.Project;
 import org.jetbrains.annotations.NotNull;
 
@@ -34,10 +35,18 @@ public String getComponentName() {
     @Override
     public void projectOpened() {
         Project ref = this.project;
-        ApplicationManager.getApplication().executeOnPooledThread(() -> ApplicationManager.getApplication().runReadAction(() -> {
-            IconProvider.getInstance(ref);
-        }));
-    }
+
+            ApplicationManager.getApplication().executeOnPooledThread(() -> ApplicationManager.getApplication().runReadAction(() -> {
+                while (DumbService.isDumb(ref)) {
+                    try {
+                        Thread.sleep(1);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                }
+                IconProvider.getInstance(ref);
+            }));
+        }
 
     @Override
     public void projectClosed() {