Page Speed Optimization Libraries  1.2.24.1
net/instaweb/rewriter/public/image_url_encoder.h
Go to the documentation of this file.
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_
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines