openproject/public/templates/work_packages/work_package_column.html

<span ng-switch="displayType">
  <progress-bar ng-switch-when="progress_bar"
                progress="displayText"
                width="80px">
  </progress-bar>

  <a ng-switch-when="link" href="{{ url }}">{{ displayText }}</a>

  <span ng-switch-default>{{ displayText }}</span>
</span>