Page Speed Optimization Libraries
1.7.30.4
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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/http/public/semantic_type.h" 00025 #include "net/instaweb/rewriter/public/common_filter.h" 00026 #include "net/instaweb/rewriter/public/resource.h" 00027 #include "net/instaweb/rewriter/public/rewrite_driver.h" 00028 #include "net/instaweb/rewriter/public/rewrite_options.h" 00029 #include "net/instaweb/rewriter/public/script_tag_scanner.h" 00030 #include "net/instaweb/util/public/basictypes.h" 00031 #include "net/instaweb/util/public/string_util.h" 00032 00033 namespace net_instaweb { 00034 class HtmlElement; 00035 class HtmlCharactersNode; 00036 class Statistics; 00037 class Variable; 00038 00040 class JsInlineFilter : public CommonFilter { 00041 public: 00042 static const char kNumJsInlined[]; 00043 explicit JsInlineFilter(RewriteDriver* driver); 00044 virtual ~JsInlineFilter(); 00045 00046 virtual void StartDocumentImpl(); 00047 virtual void EndDocument(); 00048 virtual void StartElementImpl(HtmlElement* element); 00049 virtual void EndElementImpl(HtmlElement* element); 00050 virtual void Characters(HtmlCharactersNode* characters); 00051 virtual const char* Name() const { return "InlineJs"; } 00055 virtual RewriteDriver::InlineAuthorizationPolicy AllowUnauthorizedDomain() 00056 const { 00057 return driver_->options()->HasInlineUnauthorizedResourceType( 00058 semantic_type::kScript) ? 00059 RewriteDriver::kInlineUnauthorizedResources : 00060 RewriteDriver::kInlineOnlyAuthorizedResources; 00061 } 00062 virtual bool IntendedForInlining() const { return true; } 00063 00064 static void InitStats(Statistics* statistics); 00065 00066 private: 00067 class Context; 00068 friend class Context; 00069 00070 bool ShouldInline(const ResourcePtr& resource) const; 00071 void RenderInline(const ResourcePtr& resource, const StringPiece& text, 00072 HtmlElement* element); 00073 00074 const size_t size_threshold_bytes_; 00075 ScriptTagScanner script_tag_scanner_; 00076 00082 bool should_inline_; 00083 00084 Variable* num_js_inlined_; 00085 00086 DISALLOW_COPY_AND_ASSIGN(JsInlineFilter); 00087 }; 00088 00089 } 00090 00091 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_