Page Speed Optimization Libraries  1.7.30.3
net/instaweb/rewriter/public/js_inline_filter.h
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00001 /*
00002  * Copyright 2010 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_INLINE_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_
00021 
00022 #include <cstddef>
00023 
00024 #include "net/instaweb/rewriter/public/common_filter.h"
00025 #include "net/instaweb/rewriter/public/resource.h"
00026 #include "net/instaweb/rewriter/public/script_tag_scanner.h"
00027 #include "net/instaweb/util/public/basictypes.h"
00028 #include "net/instaweb/util/public/string_util.h"
00029 
00030 namespace net_instaweb {
00031 class HtmlElement;
00032 class HtmlCharactersNode;
00033 class RewriteDriver;
00034 class Statistics;
00035 class Variable;
00036 
00038 class JsInlineFilter : public CommonFilter {
00039  public:
00040   static const char kNumJsInlined[];
00041   explicit JsInlineFilter(RewriteDriver* driver);
00042   virtual ~JsInlineFilter();
00043 
00044   virtual void StartDocumentImpl();
00045   virtual void EndDocument();
00046   virtual void StartElementImpl(HtmlElement* element);
00047   virtual void EndElementImpl(HtmlElement* element);
00048   virtual void Characters(HtmlCharactersNode* characters);
00049   virtual const char* Name() const { return "InlineJs"; }
00053   virtual bool AllowUnauthorizedDomain() const { return true; }
00054 
00055   static void InitStats(Statistics* statistics);
00056 
00057  private:
00058   class Context;
00059   friend class Context;
00060 
00061   bool ShouldInline(const ResourcePtr& resource) const;
00062   void RenderInline(const ResourcePtr& resource, const StringPiece& text,
00063                     HtmlElement* element);
00064 
00065   const size_t size_threshold_bytes_;
00066   ScriptTagScanner script_tag_scanner_;
00067 
00073   bool should_inline_;
00074 
00075   Variable* num_js_inlined_;
00076 
00077   DISALLOW_COPY_AND_ASSIGN(JsInlineFilter);
00078 };
00079 
00080 }  
00081 
00082 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_
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