WI-1470 autocomplete error in css

platform/lang-impl/src/com/intellij/psi/filters/FilterPositionUtil.java

@@ -30,10 +30,17 @@ public class FilterPositionUtil {
 
   @Nullable
   public static PsiElement searchNonSpaceNonCommentBack(PsiElement element) {
+    return searchNonSpaceNonCommentBack(element, false);
+  }
+
+  @Nullable
+  public static PsiElement searchNonSpaceNonCommentBack(PsiElement element, final boolean strict) {
     if(element == null || element.getNode() == null) return null;
     ASTNode leftNeibour = TreeUtil.prevLeaf(element.getNode());
-    while (leftNeibour != null && (leftNeibour.getElementType() == TokenType.WHITE_SPACE || leftNeibour.getPsi() instanceof PsiComment)){
-      leftNeibour = TreeUtil.prevLeaf(leftNeibour);
+    if (!strict) {
+      while (leftNeibour != null && (leftNeibour.getElementType() == TokenType.WHITE_SPACE || leftNeibour.getPsi() instanceof PsiComment)){
+        leftNeibour = TreeUtil.prevLeaf(leftNeibour);
+      }
     }
     return leftNeibour != null ? leftNeibour.getPsi() : null;
 

platform/lang-impl/src/com/intellij/psi/filters/position/AfterElement.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi.filters.position;
+
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.filters.ElementFilter;
+import com.intellij.psi.filters.FilterPositionUtil;
+
+/**
+ * User: spLeaner
+ */
+public class AfterElement extends PositionElementFilter {
+  public AfterElement(){}
+
+  public AfterElement(ElementFilter filter){
+    setFilter(filter);
+  }
+
+  public boolean isAcceptable(Object element, PsiElement context){
+    if (!(element instanceof PsiElement)) return false;
+    final PsiElement previous = FilterPositionUtil.searchNonSpaceNonCommentBack((PsiElement) element, true);
+    if(previous != null){
+      return getFilter().isAcceptable(previous, context);
+    }
+    return false;
+  }
+
+  public String toString(){
+    return "after(" +getFilter()+")";
+  }
+}