Page Speed Optimization Libraries
1.8.31.2
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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 CacheExtender* cache_extender, 00051 ImageRewriteFilter* image_rewriter, 00052 ImageCombineFilter* image_combiner); 00053 ~CssImageRewriter(); 00054 00055 static void InitStats(Statistics* statistics); 00056 00061 bool RewriteCss(int64 image_inline_max_bytes, 00062 RewriteContext* parent, 00063 CssHierarchy* hierarchy, 00064 MessageHandler* handler); 00065 00067 bool FlatteningEnabled() const; 00068 00070 bool RewritesEnabled(int64 image_inline_max_bytes) const; 00071 00074 void RewriteSlot(const ResourceSlotPtr& slot, 00075 int64 image_inline_max_bytes, 00076 RewriteContext* parent); 00077 00078 private: 00079 RewriteDriver* driver() const { 00080 return filter_->driver(); 00081 } 00082 bool RewriteImport(RewriteContext* parent, 00083 CssHierarchy* hierarchy); 00084 00085 void RewriteImage(int64 image_inline_max_bytes, 00086 const GoogleUrl& trim_url, 00087 const GoogleUrl& original_url, 00088 RewriteContext* parent, 00089 Css::Values* values, size_t value_index); 00090 00092 CssFilter* filter_; 00093 00095 CssFilter::Context* root_context_; 00096 00100 CacheExtender* cache_extender_; 00101 ImageCombineFilter* image_combiner_; 00102 ImageRewriteFilter* image_rewriter_; 00103 00104 DISALLOW_COPY_AND_ASSIGN(CssImageRewriter); 00105 }; 00106 00107 } 00108 00109 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_IMAGE_REWRITER_H_