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template "widget[@type='ForEach']", mode="widget_defs" {

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    param "hmi_element";

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    const "widgets", "func:refered_elements($forEach_widgets)[not(@id = $forEach_widgets_ids)]";

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    const "class","arg[1]/@value";

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    const "base_path","path/@value";

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    const "hmi_index_base", "$indexed_hmitree/*[@hmipath = $base_path]";

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    const "hmi_tree_base", "$hmitree/descendant-or-self::*[@path = $hmi_index_base/@path]";

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    const "hmi_tree_items", "$hmi_tree_base/*[@class = $class]";

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    const "hmi_index_items", "$indexed_hmitree/*[@path = $hmi_tree_items/@path]"; 

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    const "items_paths", "$hmi_index_items/@hmipath"; 

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    |     index_pool: [

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    foreach "$hmi_index_items" {

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    |       «@index»`if "position()!=last()" > ,`

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    }

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    |     ],

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    |     buttons: [

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    const "prefix","concat($class,':')";

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    const "buttons_regex","concat('^',$prefix,'[+\-][0-9]+')";

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    foreach "$hmi_element/*[regexp:test(@inkscape:label, $buttons_regex)]" {

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    |         ["«substring-after(@inkscape:label, concat(arg[1]/@value, ':'))»", id("«@id»")]`if "position()!=last()" > ,`

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    }

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    |     ],

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    |     init: function() {

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    |         /* TODO elt.setAttribute("onclick", "hmi_widgets['«$hmi_element/@id»'].on_click(evt)");*/

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    const "items_regex","concat('^',$prefix,'[0-9]+')";

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    const "unordered_items","$hmi_element//*[regexp:test(@inkscape:label, $items_regex)]";

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    foreach "$unordered_items" {

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        const "elt_label","concat($prefix, string(position()))"; 

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        const "elt","$unordered_items[@inkscape:label = $elt_label]";

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        const "pos","position()";

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        const "item_path", "$items_paths[$pos]";

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        if "count($elt)=0" error > Missing item labeled «$elt_label» in ForEach widget «$hmi_element/@id»

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        foreach "func:refered_elements($elt)[@id = $hmi_elements/@id][not(@id = $elt/@id)]" {

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            if "not(func:is_descendant_path(func:widget(@id)/path/@value, $item_path))"

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                error > Widget id="«@id»" label="«@inkscape:label»" is having wrong path. Accroding to ForEach widget ancestor id="«$hmi_element/@id»", path should be descendant of «$item_path».

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        }

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    }

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}

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template "widget[@type='ForEach']", mode="widget_subscribe"{

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    // param "hmi_element";

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    |     sub: function(off){

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    |     },

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    |     unsub: function(){

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    |     },

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}