decouple CodeStyleFacade and CodeStyleManager from Editor

platform/lang-api/src/com/intellij/psi/codeStyle/CodeStyleManager.java

@@ -18,7 +18,6 @@ package com.intellij.psi.codeStyle;
 import com.intellij.lang.ASTNode;
 import com.intellij.openapi.components.ServiceManager;
 import com.intellij.openapi.editor.Document;
-import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Computable;
@@ -191,7 +190,7 @@ public abstract class CodeStyleManager  {
    *         was not possible to calculate the indent.
    */
   @Nullable
-  public abstract String getLineIndent(@NotNull Editor editor);
+  public abstract String getLineIndent(@NotNull Document document, int offset);
 
   /**
    * @deprecated

platform/lang-impl/src/com/intellij/psi/impl/source/codeStyle/CodeStyleFacadeImpl.java

@@ -20,7 +20,7 @@
 package com.intellij.psi.impl.source.codeStyle;
 
 import com.intellij.codeStyle.CodeStyleFacade;
-import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.options.Configurable;
 import com.intellij.openapi.project.Project;
@@ -45,9 +45,9 @@ public class CodeStyleFacadeImpl extends CodeStyleFacade {
   }
 
   @Nullable
-  public String getLineIndent(@NotNull final Editor editor) {
+  public String getLineIndent(@NotNull final Document document, int offset) {
     if (myProject == null) return null;
-    return CodeStyleManager.getInstance(myProject).getLineIndent(editor);
+    return CodeStyleManager.getInstance(myProject).getLineIndent(document, offset);
   }
 
   public String getLineSeparator() {

platform/lang-impl/src/com/intellij/psi/impl/source/codeStyle/CodeStyleManagerImpl.java

@@ -340,14 +340,8 @@ public class CodeStyleManagerImpl extends CodeStyleManager {
   }
 
   @Nullable
-  public String getLineIndent(@NotNull Editor editor) {
-    Document doc = editor.getDocument();
-    int offset = editor.getCaretModel().getOffset();
-    if (offset >= doc.getTextLength()) {
-      return "";
-    }
-
-    PsiFile file = PsiDocumentManager.getInstance(myProject).getPsiFile(doc);
+  public String getLineIndent(@NotNull Document document, int offset) {
+    PsiFile file = PsiDocumentManager.getInstance(myProject).getPsiFile(document);
     if (file == null) return "";
 
     return getLineIndent(file, offset);

platform/platform-api/src/com/intellij/codeStyle/CodeStyleFacade.java

@@ -20,7 +20,7 @@
 package com.intellij.codeStyle;
 
 import com.intellij.openapi.components.ServiceManager;
-import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.options.Configurable;
 import com.intellij.openapi.project.Project;
@@ -38,16 +38,16 @@ public abstract class CodeStyleFacade {
   }
 
   /**
-   * Calculates the indent that should be used for the current line in the specified
-   * editor.
+   * Calculates the indent that should be used for the line at specified offset in the specified
+   * document.
    *
-   * @param editor the editor for which the indent should be calculated.
+   * @param document the document for which the indent should be calculated.
+   * @param offset the caret offset in the editor.
    * @return the indent string (containing of tabs and/or white spaces), or null if it
    *         was not possible to calculate the indent.
    */
   @Nullable
-  public abstract String getLineIndent(@NotNull Editor editor);
-
+  public abstract String getLineIndent(@NotNull Document document, int offset);
 
   public abstract int getIndentSize(FileType fileType);
 

platform/platform-api/src/com/intellij/openapi/editor/EditorModificationUtil.java

@@ -291,7 +291,8 @@ public class EditorModificationUtil {
       final int caretOffset = editor.getCaretModel().getOffset();
       boolean atLineStart = caretOffset >= doc.getTextLength() || doc.getLineStartOffset(doc.getLineNumber(caretOffset)) == caretOffset;
       if (atLineStart && project != null) {
-        String properIndent = CodeStyleFacade.getInstance(project).getLineIndent(editor);
+        int offset = editor.getCaretModel().getOffset();
+        String properIndent = offset >= doc.getTextLength() ? "" : CodeStyleFacade.getInstance(project).getLineIndent(doc, offset);
         if (properIndent != null) {
           int tabSize = editor.getSettings().getTabSize(project);
           for (int i = 0; i < properIndent.length(); i++) {

platform/platform-impl/src/com/intellij/codeStyle/DefaultCodeStyleFacade.java

@@ -19,7 +19,7 @@
  */
 package com.intellij.codeStyle;
 
-import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.options.Configurable;
 import org.jetbrains.annotations.NotNull;
@@ -31,7 +31,7 @@ public class DefaultCodeStyleFacade extends CodeStyleFacade {
   }
 
   @Nullable
-  public String getLineIndent(@NotNull final Editor editor) {
+  public String getLineIndent(@NotNull final Document document, int offset) {
     return null;
   }