Page Speed Optimization Libraries
1.8.31.3
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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_CSS_INLINE_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_CSS_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/css_tag_scanner.h" 00027 #include "net/instaweb/rewriter/public/resource.h" 00028 #include "net/instaweb/rewriter/public/rewrite_driver.h" 00029 #include "net/instaweb/rewriter/public/rewrite_options.h" 00030 #include "net/instaweb/util/public/basictypes.h" 00031 #include "net/instaweb/util/public/string.h" 00032 #include "net/instaweb/util/public/string_util.h" 00033 00034 namespace net_instaweb { 00035 00036 class CachedResult; 00037 class GoogleUrl; 00038 class HtmlElement; 00039 class Statistics; 00040 class Variable; 00041 00043 class CssInlineFilter : public CommonFilter { 00044 public: 00045 static const char kNumCssInlined[]; 00046 00047 explicit CssInlineFilter(RewriteDriver* driver); 00048 virtual ~CssInlineFilter(); 00049 00050 virtual void StartDocumentImpl(); 00051 virtual void StartElementImpl(HtmlElement* element) {} 00052 virtual void EndElementImpl(HtmlElement* element); 00053 virtual const char* Name() const { return "InlineCss"; } 00057 virtual RewriteDriver::InlineAuthorizationPolicy AllowUnauthorizedDomain() 00058 const { 00059 return driver()->options()->HasInlineUnauthorizedResourceType( 00060 semantic_type::kStylesheet) ? 00061 RewriteDriver::kInlineUnauthorizedResources : 00062 RewriteDriver::kInlineOnlyAuthorizedResources; 00063 } 00064 virtual bool IntendedForInlining() const { return true; } 00065 00066 static void InitStats(Statistics* statistics); 00067 static bool HasClosingStyleTag(StringPiece contents); 00068 00069 protected: 00072 void set_id(const char* id) { id_ = id; } 00073 00076 virtual ResourcePtr CreateResource(const char* url); 00077 00078 private: 00079 class Context; 00080 friend class Context; 00081 00082 bool ShouldInline(const ResourcePtr& resource, 00083 const StringPiece& attrs_attribute) const; 00084 void RenderInline(const ResourcePtr& resource, const CachedResult& cached, 00085 const GoogleUrl& base_url, const StringPiece& text, 00086 HtmlElement* element); 00087 00088 const char* id_; 00089 const size_t size_threshold_bytes_; 00090 00091 GoogleString domain_; 00092 CssTagScanner css_tag_scanner_; 00093 00094 Variable* num_css_inlined_; 00095 00096 DISALLOW_COPY_AND_ASSIGN(CssInlineFilter); 00097 }; 00098 00099 } 00100 00101 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_INLINE_FILTER_H_