// widget_switch.ysl2

widget_desc("Switch") {
    longdesc
    ||
    Switch widget hides all subelements whose label do not match given
    variable current value representation. For exemple if given variable type
    is HMI_INT and value is 1, then elements with label '1' will be displayed.
    Label can have comments, so '1#some comment' would also match. If matching
    variable of type HMI_STRING, then double quotes must be used. For exemple,
    '"hello"' or '"hello"#another comment' match HMI_STRING 'hello'.
    ||

    shortdesc > Show elements whose label match value.

    // TODO: add optional format/precision argument to support floating points
    // TODO: support (in)equations and ranges

    path name="value" accepts="HMI_INT,HMI_STRING" > value to compare to labels
    
}

widget_class("Switch")
    ||
        frequency = 5;
        dispatch(value) {
            for(let choice of this.choices){
                if(value != choice.value){
                    choice.elt.setAttribute("style", "display:none");
                } else {
                    choice.elt.setAttribute("style", choice.style);
                }
            }
        }
    ||

widget_defs("Switch") {
    |     choices: [
    const "regex",!"'^(\"[^\"].*\"|\-?[0-9]+|false|true)(#.*)?$'"!;

    const "subelts", "$result_widgets[@id = $hmi_element/@id]//*";
    const "subwidgets", "$subelts//*[@id = $hmi_widgets/@id]";
    const "accepted", "$subelts[not(ancestor-or-self::*/@id = $subwidgets/@id)]";

    foreach "$accepted[regexp:test(@inkscape:label,$regex)]" {
        const "literal", "regexp:match(@inkscape:label,$regex)[2]";
    |         {
    |             elt:id("«@id»"),
                  // TODO : use style.display = "none" to hide element
    |             style:"«@style»",
    |             value:«$literal»
    |         }`if "position()!=last()" > ,`
    }
    |     ],
}