text: import { t } from '../core/localizer';
  import { behaviorDrawWay } from '../behavior/draw_way';
  
  
  export function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
      var mode = {
          button: button,
          id: 'draw-line'
      };
  
      var behavior;
  
      mode.wayID = wayID;
  
      mode.isContinuing = continuing;
  
      mode.enter = function() {
          var way = context.entity(wayID);
          var index = (affix === 'prefix') ? 0 : undefined;
          var headID = (affix === 'prefix') ? way.first() : way.last();
  
          behavior = behaviorDrawWay(context, wayID, index, mode, startGraph)
              .on('rejectedSelfIntersection.modeDrawLine', function() {
                  context.ui().flash
                      .text(t('self_intersection.error.lines'))();
              });
  
          var addNode = behavior.addNode;
          behavior.addNode = function(node, d) {
              if (node.id === headID) {
                  behavior.finish();
              } else {
                  addNode(node, d);
              }
          };
  
          context.install(behavior);
      };
  
  
      mode.exit = function() {
          context.uninstall(behavior);
      };
  
  
      mode.selectedIDs = function() {
          return [wayID];
      };
  
  
      mode.activeID = function() {
          return (behavior && behavior.activeID()) || [];
      };
  
      return mode;
  }
  