Page Speed Optimization Libraries  1.7.30.1
net/instaweb/rewriter/public/js_defer_disabled_filter.h
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00001 /*
00002  * Copyright 2011 Google Inc.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *      http:///www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00018 
00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_JS_DEFER_DISABLED_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_JS_DEFER_DISABLED_FILTER_H_
00021 
00022 #include "net/instaweb/rewriter/public/common_filter.h"
00023 #include "net/instaweb/util/public/basictypes.h"
00024 
00025 namespace net_instaweb {
00026 
00027 class HtmlElement;
00028 class RewriteDriver;
00029 class Statistics;
00030 
00035 class JsDeferDisabledFilter : public CommonFilter {
00036  public:
00037   explicit JsDeferDisabledFilter(RewriteDriver* driver);
00038   virtual ~JsDeferDisabledFilter();
00039 
00040   virtual void DetermineEnabled();
00041   virtual const char* Name() const { return "JsDeferDisabledFilter"; }
00042 
00043   static void InitStats(Statistics* statistics);
00044   static void Terminate();
00045 
00048   static bool ShouldApply(RewriteDriver* driver);
00049 
00050  private:
00051   virtual void EndDocument();
00052 
00053   virtual void StartDocumentImpl() {}
00054   virtual void StartElementImpl(HtmlElement* element) {}
00055   virtual void EndElementImpl(HtmlElement* element) {}
00056 
00057   void InsertJsDeferCode();
00058 
00059   DISALLOW_COPY_AND_ASSIGN(JsDeferDisabledFilter);
00060 };
00061 
00062 }  
00063 
00064 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_JS_DEFER_DISABLED_FILTER_H_
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