<span tal:repeat="info infos" tal:omit-tag="">
<span tal:define="size info/thumbSize;
margin_top python:(slide_size - size['height']) / 2;
margin_left python:(slide_size - size['width']) / 2;
selected info/selected|nothing"
tal:attributes="class info/className;
<span tal:repeat="info infos" tal:omit-tag="">
<span tal:define="size info/thumbSize;
margin_top python:(slide_size - size['height']) / 2;
margin_left python:(slide_size - size['width']) / 2;
selected info/selected|nothing"
tal:attributes="class info/className;