Page Speed Optimization Libraries  1.7.30.4
net/instaweb/rewriter/public/split_html_config.h
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00001 /*
00002  * Copyright 2013 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_SPLIT_HTML_CONFIG_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_CONFIG_H_
00021 
00022 #include <map>
00023 #include <vector>
00024 
00025 #include "net/instaweb/util/public/basictypes.h"
00026 #include "net/instaweb/util/public/string.h"
00027 
00028 namespace net_instaweb {
00029 
00030 class CriticalLineInfo;
00031 class HtmlElement;
00032 class Panel;
00033 class RewriteDriver;
00034 
00035 struct XpathUnit {
00036   XpathUnit() : child_number(0) {}
00037 
00038   GoogleString tag_name;
00039   GoogleString attribute_value;
00040   int child_number;
00041 };
00042 
00043 typedef std::map<GoogleString, const Panel*> PanelIdToSpecMap;
00044 typedef std::vector<XpathUnit> XpathUnits;
00046 typedef std::map<GoogleString, XpathUnits*> XpathMap;
00047 
00050 class SplitHtmlConfig {
00051  public:
00055   explicit SplitHtmlConfig(RewriteDriver* driver);
00056   ~SplitHtmlConfig();
00057 
00059   static void Initialize();
00060   static void Terminate();
00061 
00062   const CriticalLineInfo* critical_line_info() const {
00063     return critical_line_info_;
00064   }
00065 
00066   const XpathMap* xpath_map() const {
00067     return &xpath_map_;
00068   }
00069 
00070   const PanelIdToSpecMap* panel_id_to_spec() const {
00071     return &panel_id_to_spec_;
00072   }
00073 
00074   const RewriteDriver* driver() const { return driver_; }
00075 
00076  private:
00078   RewriteDriver* driver_;
00079 
00080   const CriticalLineInfo* critical_line_info_; 
00081 
00083   XpathMap xpath_map_;
00084 
00086   PanelIdToSpecMap panel_id_to_spec_;
00087 
00088   DISALLOW_COPY_AND_ASSIGN(SplitHtmlConfig);
00089 };
00090 
00092 class SplitHtmlState {
00093  public:
00094   explicit SplitHtmlState(const SplitHtmlConfig* config);
00095   ~SplitHtmlState();
00096 
00097   std::vector<int>* num_children_stack() { return &num_children_stack_; }
00098 
00099   bool ElementMatchesXpath(
00100       const HtmlElement* element,
00101       const std::vector<XpathUnit>& xpath_units) const;
00102 
00104   GoogleString MatchPanelIdForElement(HtmlElement* element) const;
00105 
00108   bool IsElementSiblingOfCurrentPanel(HtmlElement* element) const;
00109 
00111   bool IsElementParentOfCurrentPanel(HtmlElement* element) const;
00112 
00115   bool IsEndMarkerForCurrentPanel(HtmlElement* element) const;
00116 
00117   const HtmlElement* current_panel_parent_element() const {
00118     return current_panel_parent_element_;
00119   }
00120 
00121   void set_current_panel_parent_element(HtmlElement* element) {
00122     current_panel_parent_element_ = element;
00123   }
00124 
00125   const GoogleString& current_panel_id() const {
00126     return current_panel_id_;
00127   }
00128 
00129   void set_current_panel_id(const GoogleString& panel_id) {
00130     current_panel_id_ = panel_id;
00131   }
00132 
00133   void UpdateNumChildrenStack(const HtmlElement* element);
00134 
00135  private:
00137   const SplitHtmlConfig* config_;
00138 
00140   std::vector<int> num_children_stack_;
00141 
00143   HtmlElement* current_panel_parent_element_;
00144 
00145   GoogleString current_panel_id_;
00146 
00147   DISALLOW_COPY_AND_ASSIGN(SplitHtmlState);
00148 };
00149 
00150 }  
00151 
00152 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_CONFIG_H_
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