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_REWRITE_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_REWRITE_FILTER_H_ 00021 00022 #include "net/instaweb/rewriter/public/common_filter.h" 00023 #include "net/instaweb/rewriter/public/resource.h" 00024 #include "net/instaweb/rewriter/public/resource_slot.h" 00025 #include "net/instaweb/util/public/basictypes.h" 00026 #include "net/instaweb/util/public/string_util.h" 00027 00028 namespace net_instaweb { 00029 00030 class OutputResource; 00031 class RewriteContext; 00032 class RewriteDriver; 00033 class UrlSegmentEncoder; 00034 00035 class RewriteFilter : public CommonFilter { 00036 public: 00037 explicit RewriteFilter(RewriteDriver* driver) 00038 : CommonFilter(driver) { 00039 } 00040 virtual ~RewriteFilter(); 00041 00042 virtual const char* id() const = 0; 00043 00046 ResourcePtr CreateInputResourceFromOutputResource( 00047 OutputResource* output_resource); 00048 00053 virtual const UrlSegmentEncoder* encoder() const; 00054 00061 virtual bool ComputeOnTheFly() const; 00062 00066 virtual RewriteContext* MakeRewriteContext(); 00067 00071 virtual RewriteContext* MakeNestedRewriteContext( 00072 RewriteContext* parent, const ResourceSlotPtr& slot); 00073 00086 static StringPiece GetCharsetForScript(const Resource* script, 00087 const StringPiece attribute_charset, 00088 const StringPiece enclosing_charset); 00089 00090 private: 00091 DISALLOW_COPY_AND_ASSIGN(RewriteFilter); 00092 }; 00093 00094 } 00095 00096 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_REWRITE_FILTER_H_