001package votorola.s.gwt.wic; // Copyright 2012-2013, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import com.google.gwt.http.client.UrlBuilder; 004import com.google.gwt.regexp.shared.*; 005import com.google.gwt.user.client.Window; 006import java.util.*; 007import votorola.a.count.*; 008import votorola.g.lang.*; 009import votorola.g.web.gwt.event.*; 010import votorola.s.gwt.stage.*; 011 012 013/** A controller that loads a new page when the position (actor + poll) changes on stage. 014 */ 015final class PositionPager extends PollPager 016{ 017 018 019 /** Creates the single instance of PositionPager. 020 */ 021 PositionPager( final Stage stage ) // called by CountIn 022 { 023 super( stage ); 024 actorName0 = stage.getActorName(); 025 } 026 027 028 029 // ------------------------------------------------------------------------------------ 030 031 032 /** The initial actor name. 033 */ 034 String actorName0; // matching (it is assumed) query parameter 'u' or 'v' 035 036 037 038 // - P r o p e r t y - C h a n g e - H a n d l e r ------------------------------------ 039 040 041 public @Override void onPropertyChange( final PropertyChange e ) 042 { 043 // cf. PollPager.onPropertyChange 044 045 final String propertyName = e.propertyName(); 046 if( !propertyName.startsWith("actorName") && !propertyName.startsWith("pollName") ) return; 047 048 final Stage stage = Stage.i(); 049 final String actorName = stage.getActorName(); 050 final String pollName = stage.getPollName(); 051 if( ObjectX.nullEquals(actorName,actorName0) && ObjectX.nullEquals(pollName,pollName0) ) 052 { 053 // no actual change, per PollPager.onPropertyChange 054 return; 055 } 056 057 final UrlBuilder u = Window.Location.createUrlBuilder(); 058 if( !setParameter("u",actorName,u) & // unconditional AND 059 !setParameter("p",Poll.U.toQuery(pollName),u) ) 060 { 061 // parameters are already set correctly, so apparently actorName0 or pollName0 weren't 062 assert false: "actorName0 init to page param 'u' or 'v', and pollName0 to 'p'"; 063 actorName0 = actorName; // ensure they are now correct 064 pollName0 = pollName; 065 return; 066 } 067 068 u.removeParameter( "v" ); // in case it was set, it's illegal to specify both 'u' and 'v' 069 final Map<String,List<String>> paramMap = Window.Location.getParameterMap(); 070 for( final String paramName: paramMap.keySet() ) 071 { 072 // Find and remove the page version parameter if there is one. Currently only 073 // the "Rank" page has it. If it remains, Wicket (1.5.4) will serve the same 074 // page regardless of other parameter changes. 075 if( !PAGE_VERSION_PARAM_NAME_PATTERN.test( paramName )) continue; 076 077 u.removeParameter( paramName ); 078 break; 079 } 080 081 Stage.setActorName( actorName0 ); // back to original values, keep state clean in BFCache 082 stage.setPollName( pollName0 ); 083 stage.prompter().setSuppressed( true ); // suppress event, which is now redundant 084 Window.Location.assign( u.buildString() ); 085 } 086 087 088 089//// P r i v a t e /////////////////////////////////////////////////////////////////////// 090 091 092 private static final RegExp PAGE_VERSION_PARAM_NAME_PATTERN = RegExp.compile( "^[0-9]+$" ); 093 094 095}