Page Speed Optimization Libraries  1.2.24.1
net/instaweb/rewriter/public/defer_iframe_filter.h
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00001 /*
00002  * Copyright 2012 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 
00052 
00053 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_DEFER_IFRAME_FILTER_H_
00054 #define NET_INSTAWEB_REWRITER_PUBLIC_DEFER_IFRAME_FILTER_H_
00055 
00056 #include "net/instaweb/htmlparse/public/empty_html_filter.h"
00057 #include "net/instaweb/util/public/basictypes.h"
00058 
00059 namespace net_instaweb {
00060 
00061 class HtmlElement;
00062 class RewriteDriver;
00063 class StaticJavascriptManager;
00064 
00065 class DeferIframeFilter : public EmptyHtmlFilter {
00066  public:
00067   static const char kDeferIframeInit[];
00068   static const char kDeferIframeIframeJs[];
00069   explicit DeferIframeFilter(RewriteDriver* driver);
00070   ~DeferIframeFilter();
00071 
00072   virtual void StartDocument();
00073   virtual void StartElement(HtmlElement* element);
00074   virtual void EndElement(HtmlElement* element);
00075   virtual void DetermineEnabled();
00076 
00077   virtual const char* Name() const { return "DeferIframe"; }
00078 
00079  private:
00080   RewriteDriver* driver_;
00081   StaticJavascriptManager* static_js_manager_;
00082   bool script_inserted_;
00083 
00084   DISALLOW_COPY_AND_ASSIGN(DeferIframeFilter);
00085 };
00086 
00087 }  
00088 
00089 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_DEFER_IFRAME_FILTER_H_
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