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js_inline_filter.h
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1 /*
2  * Copyright 2010 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http:///www.apache.org/licenses/LICENSE-2.0
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10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
18 
19 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_
20 #define NET_INSTAWEB_REWRITER_PUBLIC_JS_INLINE_FILTER_H_
21 
22 #include <cstddef>
23 
29 #include "pagespeed/kernel/base/basictypes.h"
30 #include "pagespeed/kernel/base/string.h"
31 #include "pagespeed/kernel/base/string_util.h"
32 #include "pagespeed/kernel/http/semantic_type.h"
33 
34 namespace net_instaweb {
35 class HtmlElement;
36 class HtmlCharactersNode;
37 class Statistics;
38 class Variable;
39 
41 class JsInlineFilter : public CommonFilter {
42  public:
43  static const char kNumJsInlined[];
44  explicit JsInlineFilter(RewriteDriver* driver);
45  virtual ~JsInlineFilter();
46 
47  virtual void StartDocumentImpl();
48  virtual void EndDocument();
49  virtual void StartElementImpl(HtmlElement* element);
50  virtual void EndElementImpl(HtmlElement* element);
51  virtual void Characters(HtmlCharactersNode* characters);
52  virtual const char* Name() const { return "InlineJs"; }
57  const {
58  return driver()->options()->HasInlineUnauthorizedResourceType(
59  semantic_type::kScript) ?
60  RewriteDriver::kInlineUnauthorizedResources :
61  RewriteDriver::kInlineOnlyAuthorizedResources;
62  }
63  virtual bool IntendedForInlining() const { return true; }
64 
65  static void InitStats(Statistics* statistics);
66 
67  private:
68  class Context;
69  friend class Context;
70 
71  bool ShouldInline(const ResourcePtr& resource, GoogleString* reason) const;
72  void RenderInline(const ResourcePtr& resource, const StringPiece& text,
73  HtmlElement* element);
74 
75  const size_t size_threshold_bytes_;
76  ScriptTagScanner script_tag_scanner_;
77 
83  bool should_inline_;
84 
85  Variable* num_js_inlined_;
86 
87  DISALLOW_COPY_AND_ASSIGN(JsInlineFilter);
88 };
89 
90 }
91 
92 #endif
Definition: common_filter.h:48
virtual void Characters(HtmlCharactersNode *characters)
Definition: rewrite_driver.h:98
Inline small Javascript files.
Definition: js_inline_filter.h:41
Definition: script_tag_scanner.h:30
virtual void StartDocumentImpl()
virtual bool IntendedForInlining() const
Definition: js_inline_filter.h:63
InlineAuthorizationPolicy
See CreateInputResource.
Definition: rewrite_driver.h:135
const RewriteOptions * options() const
Return the options used for this RewriteDriver.
Definition: rewrite_driver.h:478
virtual RewriteDriver::InlineAuthorizationPolicy AllowUnauthorizedDomain() const
Definition: js_inline_filter.h:56