Migration to PsiFile-based code style API

platform/lang-api/src/com/intellij/application/options/CodeStyle.java

@@ -39,6 +39,7 @@ public class CodeStyle {
    */
   @NotNull
   public static CodeStyleSettings getDefaultSettings() {
+    //noinspection deprecation
     return CodeStyleSettingsManager.getInstance().getCurrentSettings();
   }
 
@@ -68,6 +69,19 @@ public class CodeStyle {
     return getDefaultSettings();
   }
 
+
+  public static CodeStyleSettings getSettings(@NotNull Editor editor) {
+    Project project = editor.getProject();
+    if (project != null) {
+      PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());
+      if (file != null) {
+        return getSettings(file);
+      }
+      return getSettings(project);
+    }
+    return getDefaultSettings();
+  }
+
   /**
    * Returns language code style settings for the specified editor. If the editor has an associated document and PSI file, returns
    * settings for the PSI file or {@code null} otherwise.

platform/platform-impl/src/com/intellij/openapi/editor/impl/SettingsImpl.java

@@ -266,7 +266,10 @@ public class SettingsImpl implements EditorSettings {
   @Override
   public List<Integer> getSoftMargins() {
     if (mySoftMargins != null) return mySoftMargins;
-    return CodeStyleSettingsManager.getSettings(myEditor == null ? null : myEditor.getProject()).getSoftMargins(myLanguage);
+    return
+      myEditor == null ?
+      CodeStyle.getDefaultSettings().getSoftMargins(myLanguage) :
+      CodeStyle.getSettings(myEditor).getSoftMargins(myLanguage);
   }
 
   @Override