| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: jmarantz@google.com (Joshua Marantz) |
| |
| #ifndef NET_INSTAWEB_REWRITER_PUBLIC_SINGLE_REWRITE_CONTEXT_H_ |
| #define NET_INSTAWEB_REWRITER_PUBLIC_SINGLE_REWRITE_CONTEXT_H_ |
| |
| #include "net/instaweb/rewriter/public/resource.h" |
| #include "net/instaweb/rewriter/public/rewrite_context.h" |
| #include "net/instaweb/rewriter/public/server_context.h" |
| #include "pagespeed/kernel/base/basictypes.h" |
| |
| namespace net_instaweb { |
| |
| class CachedResult; |
| class OutputPartitions; |
| class ResourceContext; |
| class RewriteDriver; |
| |
| // Class that unifies tasks common to building rewriters for filters |
| // that only do one-for-one URL substitutions. |
| class SingleRewriteContext : public RewriteContext { |
| public: |
| // Transfers ownership of resource_context, which must be NULL or |
| // allocated with 'new'. |
| SingleRewriteContext(RewriteDriver* driver, RewriteContext* parent, |
| ResourceContext* resource_context); |
| virtual ~SingleRewriteContext(); |
| |
| protected: |
| // Subclasses of SingleRewriteContext must override this: |
| virtual void RewriteSingle(const ResourcePtr& input, |
| const OutputResourcePtr& output) = 0; |
| |
| // SingleRewriteContext takes care of these methods from RewriteContext: |
| virtual bool Partition(OutputPartitions* partitions, |
| OutputResourceVector* outputs); |
| virtual void Rewrite(int partition_index, |
| CachedResult* partition, |
| const OutputResourcePtr& output); |
| |
| // Adds a link: rel=canonical header pointing to the input URL as canonical. |
| void AddLinkRelCanonical(const ResourcePtr& input, |
| const OutputResourcePtr& output); |
| |
| // Constructs a <url>; rel="canonical" value for use with a Link header. |
| GoogleString RelCanonicalHeaderValue(StringPiece url); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(SingleRewriteContext); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // NET_INSTAWEB_REWRITER_PUBLIC_SINGLE_REWRITE_CONTEXT_H_ |