Page Speed Optimization Libraries
1.7.30.3
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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/rewriter/public/common_filter.h" 00025 #include "net/instaweb/rewriter/public/css_tag_scanner.h" 00026 #include "net/instaweb/rewriter/public/resource.h" 00027 #include "net/instaweb/util/public/basictypes.h" 00028 #include "net/instaweb/util/public/string.h" 00029 #include "net/instaweb/util/public/string_util.h" 00030 00031 namespace net_instaweb { 00032 00033 class CachedResult; 00034 class GoogleUrl; 00035 class HtmlElement; 00036 class RewriteDriver; 00037 class Statistics; 00038 class Variable; 00039 00041 class CssInlineFilter : public CommonFilter { 00042 public: 00043 static const char kNumCssInlined[]; 00044 00045 explicit CssInlineFilter(RewriteDriver* driver); 00046 virtual ~CssInlineFilter(); 00047 00048 virtual void StartDocumentImpl(); 00049 virtual void StartElementImpl(HtmlElement* element) {} 00050 virtual void EndElementImpl(HtmlElement* element); 00051 virtual const char* Name() const { return "InlineCss"; } 00055 virtual bool AllowUnauthorizedDomain() const { return true; } 00056 00057 static void InitStats(Statistics* statistics); 00058 00059 protected: 00062 void set_id(const char* id) { id_ = id; } 00063 00066 virtual ResourcePtr CreateResource(const char* url); 00067 00068 private: 00069 class Context; 00070 friend class Context; 00071 00072 bool ShouldInline(const ResourcePtr& resource, 00073 const StringPiece& attrs_attribute) const; 00074 void RenderInline(const ResourcePtr& resource, const CachedResult& cached, 00075 const GoogleUrl& base_url, const StringPiece& text, 00076 HtmlElement* element); 00077 00078 const char* id_; 00079 const size_t size_threshold_bytes_; 00080 00081 GoogleString domain_; 00082 CssTagScanner css_tag_scanner_; 00083 00084 Variable* num_css_inlined_; 00085 00086 DISALLOW_COPY_AND_ASSIGN(CssInlineFilter); 00087 }; 00088 00089 } 00090 00091 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_INLINE_FILTER_H_