Page Speed Optimization Libraries
1.7.30.3
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00001 /* 00002 * Copyright 2011 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_IMAGE_REWRITER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_CSS_IMAGE_REWRITER_H_ 00021 00022 #include <cstddef> 00023 00024 #include "net/instaweb/rewriter/public/css_filter.h" 00025 #include "net/instaweb/rewriter/public/resource_slot.h" 00026 #include "net/instaweb/util/public/basictypes.h" 00027 00028 namespace Css { 00029 00030 class Values; 00031 00032 } 00033 00034 namespace net_instaweb { 00035 00036 class CacheExtender; 00037 class CssHierarchy; 00038 class GoogleUrl; 00039 class ImageCombineFilter; 00040 class ImageRewriteFilter; 00041 class MessageHandler; 00042 class RewriteContext; 00043 class RewriteDriver; 00044 class Statistics; 00045 00046 class CssImageRewriter { 00047 public: 00048 CssImageRewriter(CssFilter::Context* root_context, 00049 CssFilter* filter, 00050 RewriteDriver* driver, 00051 CacheExtender* cache_extender, 00052 ImageRewriteFilter* image_rewriter, 00053 ImageCombineFilter* image_combiner); 00054 ~CssImageRewriter(); 00055 00056 static void InitStats(Statistics* statistics); 00057 00062 bool RewriteCss(int64 image_inline_max_bytes, 00063 RewriteContext* parent, 00064 CssHierarchy* hierarchy, 00065 MessageHandler* handler); 00066 00068 bool FlatteningEnabled() const; 00069 00071 bool RewritesEnabled(int64 image_inline_max_bytes) const; 00072 00075 void RewriteSlot(const ResourceSlotPtr& slot, 00076 int64 image_inline_max_bytes, 00077 RewriteContext* parent); 00078 00079 private: 00080 bool RewriteImport(RewriteContext* parent, 00081 CssHierarchy* hierarchy); 00082 00083 void RewriteImage(int64 image_inline_max_bytes, 00084 const GoogleUrl& trim_url, 00085 const GoogleUrl& original_url, 00086 RewriteContext* parent, 00087 Css::Values* values, size_t value_index); 00088 00090 CssFilter* filter_; 00091 00093 RewriteDriver* driver_; 00094 00096 CssFilter::Context* root_context_; 00097 00101 CacheExtender* cache_extender_; 00102 ImageCombineFilter* image_combiner_; 00103 ImageRewriteFilter* image_rewriter_; 00104 00105 DISALLOW_COPY_AND_ASSIGN(CssImageRewriter); 00106 }; 00107 00108 } 00109 00110 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_IMAGE_REWRITER_H_