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Viewing changes to debian/modules/ngx_pagespeed/psol/include/net/instaweb/rewriter/public/js_disable_filter.h

  • Committer: Vivian
  • Date: 2015-12-04 18:20:11 UTC
  • Revision ID: git-v1:a36f2bc32e884f7473b3a47040e5411306144d7d
* Do not extract psol.tar.gz

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debian/modules/ngx_pagespeed/psol/include/net/instaweb/rewriter/public/js_disable_filter.h
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/*
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 * Copyright 2010 Google Inc.
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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// Author: gagansingh@google.com (Gagan Singh)
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#ifndef NET_INSTAWEB_REWRITER_PUBLIC_JS_DISABLE_FILTER_H_
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#define NET_INSTAWEB_REWRITER_PUBLIC_JS_DISABLE_FILTER_H_
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#include "net/instaweb/http/public/user_agent_matcher.h"
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#include "net/instaweb/rewriter/public/common_filter.h"
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#include "net/instaweb/rewriter/public/script_tag_scanner.h"
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#include "net/instaweb/util/public/basictypes.h"
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#include "net/instaweb/util/public/string.h"
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namespace net_instaweb {
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class HtmlElement;
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class RewriteDriver;
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// Disables javscript by converting input html:
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//   <script src="1.js">var a = 1...</script>
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// to:
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//   <noscript disabled="true">
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//     <script src="1.js">var a = 1...</script>
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//   </noscript>
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//
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class JsDisableFilter : public CommonFilter {
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 public:
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  explicit JsDisableFilter(RewriteDriver* driver);
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  ~JsDisableFilter();
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  static const char kEnableJsExperimental[];
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  static const char kElementOnloadCode[];
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  virtual void DetermineEnabled(GoogleString* disabled_reason);
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  virtual const char* Name() const {
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    return "JsDisableFilter";
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  }
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 private:
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  virtual void StartDocumentImpl();
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  virtual void StartElementImpl(HtmlElement* element);
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  virtual void EndElementImpl(HtmlElement* element);
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  virtual void EndDocument();
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  // Inserts the experimental js enable/disable code.
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  void InsertJsDeferExperimentalScript();
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  // Insert meta tag with 'X-UA-Compatible'. This will avoid IE going to quirks
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  // mode. More information about this can be found in
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  // http://webdesign.about.com/od/metataglibraries/p/x-ua-compatible-meta-tag.htm
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  void InsertMetaTagForIE(HtmlElement* element);
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  ScriptTagScanner script_tag_scanner_;
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  int index_;
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  bool ie_meta_tag_written_;
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  int prefetch_js_elements_count_;
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  int max_prefetch_js_elements_;
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  GoogleString prefetch_js_elements_;
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  bool should_look_for_prefetch_js_elements_;
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  UserAgentMatcher::PrefetchMechanism prefetch_mechanism_;
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  DISALLOW_COPY_AND_ASSIGN(JsDisableFilter);
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};
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}  // namespace net_instaweb
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#endif  // NET_INSTAWEB_REWRITER_PUBLIC_JS_DISABLE_FILTER_H_