Show advertiser only once

python/ide/src/META-INF/PyCharmCorePlugin.xml

@@ -20,5 +20,6 @@
                         overrides="true"/>
 
     <annotator language="Python" implementationClass="com.jetbrains.python.PyCharmProfessionalAdvertiser"/>
+    <projectService serviceImplementation="com.jetbrains.python.PyCharmProfessionalAdvertiserSettings"/>
   </extensions>
 </idea-plugin>

python/src/com/jetbrains/python/PyCharmProfessionalAdvertiser.java

@@ -40,27 +40,29 @@ public class PyCharmProfessionalAdvertiser implements Annotator {
 
   @Override
   public void annotate(@NotNull PsiElement element, @NotNull AnnotationHolder holder) {
+
     if (element instanceof PyFile) {
 
       final PyFile pyFile = (PyFile)element;
       final Project project = element.getProject();
 
+      if (getSettings(project).shown) {
+        return;
+      }
+      getSettings(project).shown = true;
+
       final VirtualFile vFile = pyFile.getVirtualFile();
       if (vFile != null && FileIndexFacade.getInstance(project).isInLibraryClasses(vFile)) {
         return;
       }
 
-      final Boolean showingFlag = project.getUserData(DONT_SHOW_BALLOON);
-      if (showingFlag != null && showingFlag.booleanValue()) {
-        return;
-      }
 
       if (!moduleUsesPythonSdk(pyFile)) {
         return;
       }
 
       if (PyCellUtil.hasCells(pyFile)) {
-        showInspectionAdvertisement(project, "code cells in editor");
+        showInspectionAdvertisement(project, "code cells in the editor");
       }
 
       if (containsImport(pyFile, "django")) {

python/src/com/jetbrains/python/PyCharmProfessionalAdvertiserSettings.java

@@ -0,0 +1,27 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.jetbrains.python;
+
+import com.intellij.openapi.components.PersistentStateComponent;
+import com.intellij.openapi.components.State;
+import com.intellij.util.xmlb.XmlSerializerUtil;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author traff
+ */
+@State(name = "PyCharmProfessionalAdvertiser")
+public class PyCharmProfessionalAdvertiserSettings implements PersistentStateComponent<PyCharmProfessionalAdvertiserSettings> {
+  public boolean shown = false;
+
+  @Nullable
+  @Override
+  public PyCharmProfessionalAdvertiserSettings getState() {
+    return this;
+  }
+
+  @Override
+  public void loadState(@NotNull PyCharmProfessionalAdvertiserSettings state) {
+    XmlSerializerUtil.copyBean(state, this);
+  }
+}