Page Speed Optimization Libraries  1.8.31.3
net/instaweb/rewriter/public/css_resource_slot.h
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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 
00022 
00023 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_CSS_RESOURCE_SLOT_H_
00024 #define NET_INSTAWEB_REWRITER_PUBLIC_CSS_RESOURCE_SLOT_H_
00025 
00026 #include <cstddef>
00027 #include <set>
00028 
00029 #include "net/instaweb/rewriter/public/resource.h"
00030 #include "net/instaweb/rewriter/public/resource_slot.h"
00031 #include "net/instaweb/util/public/basictypes.h"
00032 #include "net/instaweb/util/public/string.h"
00033 #include "net/instaweb/util/public/string_util.h"
00034 #include "pagespeed/kernel/http/google_url.h"
00035 
00036 namespace Css { class Values; }
00037 
00038 namespace net_instaweb {
00039 
00040 class RewriteOptions;
00041 
00043 class CssResourceSlot : public ResourceSlot {
00044  public:
00045   virtual void Render();
00046   virtual void Finished();
00047   virtual GoogleString LocationString();
00048 
00049   Css::Values* values() const { return values_; }
00050   size_t value_index() const { return value_index_; }
00051   UrlRelativity url_relativity() const { return url_relativity_; }
00052 
00053   virtual bool DirectSetUrl(const StringPiece& url);
00054   virtual bool CanDirectSetUrl() { return true; }
00055 
00056  protected:
00057   CssResourceSlot(const ResourcePtr& resource,
00058                   const GoogleUrl& trim_url, const RewriteOptions* options,
00059                   Css::Values* values, size_t value_index);
00060 
00061   REFCOUNT_FRIEND_DECLARATION(CssResourceSlot);
00062   virtual ~CssResourceSlot();
00063 
00064  private:
00065   friend class CssResourceSlotFactory;
00066 
00067   Css::Values* values_;
00068   size_t value_index_;
00069 
00070   UrlRelativity url_relativity_;
00071   GoogleUrl trim_url_;
00072   const RewriteOptions* options_;
00073 
00074   DISALLOW_COPY_AND_ASSIGN(CssResourceSlot);
00075 };
00076 
00077 typedef RefCountedPtr<CssResourceSlot> CssResourceSlotPtr;
00078 
00081 class CssResourceSlotFactory {
00082  public:
00083   CssResourceSlotFactory() {}
00084   ~CssResourceSlotFactory();
00085 
00088   CssResourceSlotPtr GetSlot(const ResourcePtr& resource,
00089                              const GoogleUrl& trim_url,
00090                              const RewriteOptions* options,
00091                              Css::Values* values, size_t value_index);
00092   CssResourceSlotPtr UniquifySlot(CssResourceSlotPtr slot);
00093 
00094  private:
00095   class SlotComparator {
00096    public:
00097     bool operator()(const CssResourceSlotPtr& p,
00098                     const CssResourceSlotPtr& q) const;
00099   };
00100   typedef std::set<CssResourceSlotPtr, SlotComparator> SlotSet;
00101 
00102   SlotSet slots_;
00103   DISALLOW_COPY_AND_ASSIGN(CssResourceSlotFactory);
00104 };
00105 
00106 }  
00107 
00108 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_RESOURCE_SLOT_H_
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