Page Speed Optimization Libraries
1.7.30.4
|
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_DISABLE_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_JS_DISABLE_FILTER_H_ 00021 00022 #include "net/instaweb/http/public/user_agent_matcher.h" 00023 #include "net/instaweb/rewriter/public/common_filter.h" 00024 #include "net/instaweb/rewriter/public/script_tag_scanner.h" 00025 #include "net/instaweb/util/public/basictypes.h" 00026 #include "net/instaweb/util/public/string.h" 00027 00028 namespace net_instaweb { 00029 00030 class HtmlElement; 00031 class RewriteDriver; 00032 class RewriteOptions; 00033 00041 class JsDisableFilter : public CommonFilter { 00042 public: 00043 explicit JsDisableFilter(RewriteDriver* driver); 00044 ~JsDisableFilter(); 00045 00046 static const char kEnableJsExperimental[]; 00047 static const char kElementOnloadCode[]; 00048 00049 virtual void DetermineEnabled(); 00050 00051 virtual const char* Name() const { 00052 return "JsDisableFilter"; 00053 } 00054 00055 private: 00056 virtual void StartDocumentImpl(); 00057 00058 virtual void StartElementImpl(HtmlElement* element); 00059 00060 virtual void EndElementImpl(HtmlElement* element); 00061 00062 virtual void EndDocument(); 00063 00065 void InsertJsDeferExperimentalScript(); 00066 00070 void InsertMetaTagForIE(HtmlElement* element); 00071 00072 RewriteDriver* rewrite_driver_; 00073 ScriptTagScanner script_tag_scanner_; 00074 int index_; 00075 bool ie_meta_tag_written_; 00076 int prefetch_js_elements_count_; 00077 int max_prefetch_js_elements_; 00078 GoogleString prefetch_js_elements_; 00079 bool should_look_for_prefetch_js_elements_; 00080 UserAgentMatcher::PrefetchMechanism prefetch_mechanism_; 00081 00082 DISALLOW_COPY_AND_ASSIGN(JsDisableFilter); 00083 }; 00084 00085 } 00086 00087 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_JS_DISABLE_FILTER_H_