/*
 * Copyright 2000-2009 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.
 */

/*
 * @author max
 */
package com.intellij.lang;

import com.intellij.lang.documentation.CompositeDocumentationProvider;
import com.intellij.lang.documentation.DocumentationProvider;
import org.jetbrains.annotations.NotNull;

import java.util.List;

public class LanguageDocumentation extends LanguageExtension<DocumentationProvider> {
  public static final LanguageDocumentation INSTANCE = new LanguageDocumentation();

  private LanguageDocumentation() {
    super("com.intellij.lang.documentationProvider");
  }

  @Override
  public DocumentationProvider forLanguage(@NotNull final Language l) {
    final List<DocumentationProvider> providers = allForLanguage(l);
    if (providers.size() < 2) {
      return super.forLanguage(l);
    }
    return CompositeDocumentationProvider.wrapProviders(providers);
  }
}

@@ -1,13 +1,10 @@
 /
-*%0A *
+/
  Copyrig
@@ -13,17 +13,17 @@
  2000-20
-0
+1
 9 JetBra
@@ -36,566 +36,109 @@
 r.o.
-%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A * http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */
+ Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 %0A%0A/*
@@ -651,16 +651,87 @@
 );%0A  %7D%0A%0A
+  /**%0A   * This method is left to preserve binary compatibility.%0A   */%0A
   @Overr
@@ -802,24 +802,154 @@
 nguage l) %7B%0A
+    return super.forLanguage(l);%0A  %7D%0A%0A  @Override%0A  protected DocumentationProvider findForLanguage(@NotNull Language language) %7B%0A
     final Li
@@ -998,24 +998,31 @@
 orLanguage(l
+anguage
 );%0A    if (p
@@ -1056,32 +1056,36 @@
   return super.f
+indF
 orLanguage(l);%0A 
@@ -1076,24 +1076,31 @@
 orLanguage(l
+anguage
 );%0A    %7D%0A   

Reimplement CompositeDocumentationProvider building so that it can be cached