net/systemeD/halcyon/connection/actions/MergeWaysAction.as

   1 package net.systemeD.halcyon.connection.actions {
   2
   3     import net.systemeD.halcyon.connection.*;
   4
   5     public class MergeWaysAction extends CompositeUndoableAction {
   6         private var way1:Way;
   7         private var way2:Way;
   8         private var toPos:uint;
   9         private var fromPos:uint;
  10         // ** FIXME: not at all elegant having these stuffed in static variables; we should probably use events instead
  11         static public var lastTagsMerged:Boolean;
  12         static public var lastRelationsMerged:Boolean;
  13
  14         public function MergeWaysAction(way1:Way, way2:Way, toPos:uint, fromPos:uint) {
  15             super("Merge ways "+way1.id+" "+way2.id);
  16             this.way1 = way1;
  17             this.way2 = way2;
  18             this.toPos = toPos;
  19             this.fromPos = fromPos;
  20             lastTagsMerged = false;
  21             lastRelationsMerged = false;
  22         }
  23
  24         public override function doAction():uint {
  25             // subactions are added to the composite list -- we then
  26             // execute them all at the bottom. Doing it this way gives
  27             // us an automatic undo
  28             super.clearActions();
  29             way1.suspend();
  30
  31             mergeRelations();
  32             lastTagsMerged = way1.mergeTags(way2,push);
  33                 mergeNodes();
  34                         way2.remove(push);
  35
  36             super.doAction();
  37                         way1.resume();
  38
  39             return SUCCESS;
  40         }
  41
  42         public override function undoAction():uint {
  43             way1.suspend();
  44             super.undoAction();
  45             way1.resume();
  46
  47             return SUCCESS;
  48         }
  49
  50         public function mergeRelations():void {
  51                         for each (var r:Relation in way2.parentRelations) {
  52                                 // ** needs to copy roles as well
  53                                 if (r.findEntityMemberIndex(way1)==-1) {
  54                                         r.appendMember(new RelationMember(way1, ''), push);
  55                                         lastRelationsMerged=true;
  56                                 }
  57                         }
  58         }
  59
  60
  61         public function mergeNodes():void {
  62             var i:int;
  63                 if (fromPos==0) {
  64                     for (i = 0; i < way2.length; i++)
  65                         way1.addToEnd(toPos, way2.getNode(i), push);
  66                 } else {
  67                     for (i = way2.length-1; i >= 0; i--)
  68                         way1.addToEnd(toPos, way2.getNode(i), push);
  69                 }
  70         }
  71     }
  72 }
  73