Page Speed Optimization Libraries
1.2.24.1
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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 */ 00017 00018 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_IMAGE_URL_ENCODER_H_ 00019 #define NET_INSTAWEB_REWRITER_PUBLIC_IMAGE_URL_ENCODER_H_ 00020 00021 #include "net/instaweb/rewriter/cached_result.pb.h" 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/string.h" 00024 #include "net/instaweb/util/public/string_util.h" 00025 #include "net/instaweb/util/public/url_segment_encoder.h" 00026 00027 namespace net_instaweb { 00028 class MessageHandler; 00029 00056 class ImageUrlEncoder : public UrlSegmentEncoder { 00057 public: 00058 ImageUrlEncoder() {} 00059 virtual ~ImageUrlEncoder(); 00060 00061 virtual void Encode(const StringVector& urls, 00062 const ResourceContext* dim, 00063 GoogleString* rewritten_url) const; 00064 00065 virtual bool Decode(const StringPiece& url_segment, 00066 StringVector* urls, 00067 ResourceContext* dim, 00068 MessageHandler* handler) const; 00069 00070 static bool HasDimensions(const ResourceContext& data) { 00071 return (data.has_desired_image_dims() && 00072 HasValidDimensions(data.desired_image_dims())); 00073 } 00074 00075 static bool HasValidDimensions(const ImageDim& dims) { 00076 return (dims.has_width() && dims.has_height()); 00077 } 00078 00079 static bool HasDimension(const ResourceContext& data) { 00080 return (data.has_desired_image_dims() && 00081 HasValidDimension(data.desired_image_dims())); 00082 } 00083 00084 static bool HasValidDimension(const ImageDim& dims) { 00085 return (dims.has_width() || dims.has_height()); 00086 } 00087 00088 private: 00089 DISALLOW_COPY_AND_ASSIGN(ImageUrlEncoder); 00090 }; 00091 00092 } 00093 00094 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_IMAGE_URL_ENCODER_H_