SVGHMI: Fix browser side exception when some widget are not used, and are then discarded and not present in final SVG. In that case JS code was still making reference to discarded widget elements and was raising exception at init.
template "widget[@type='ForEach']", mode="widget_defs" {
param "hmi_element";
if "count(path) != 1" error > ForEach widget «$hmi_element/@id» must have one HMI path given.
if "count(arg) != 1" error > ForEach widget «$hmi_element/@id» must have one argument given : a class name.
const "class","arg[1]/@value";
const "base_path","path/@value";
const "hmi_index_base", "$indexed_hmitree/*[@hmipath = $base_path]";
const "hmi_tree_base", "$hmitree/descendant-or-self::*[@path = $hmi_index_base/@path]";
const "hmi_tree_items", "$hmi_tree_base/*[@class = $class]";
const "hmi_index_items", "$indexed_hmitree/*[@path = $hmi_tree_items/@path]";
const "items_paths", "$hmi_index_items/@hmipath";
| index_pool: [
foreach "$hmi_index_items" {
| «@index»`if "position()!=last()" > ,`
}
| ],
| init: function() {
const "prefix","concat($class,':')";
const "buttons_regex","concat('^',$prefix,'[+\-][0-9]+')";
const "buttons", "$hmi_element/*[regexp:test(@inkscape:label, $buttons_regex)]";
foreach "$buttons" {
const "op","substring-after(@inkscape:label, $prefix)";
| id("«@id»").setAttribute("onclick", "hmi_widgets['«$hmi_element/@id»'].on_click('«$op»', evt)");
}
|
| this.items = [
const "items_regex","concat('^',$prefix,'[0-9]+')";
const "unordered_items","$hmi_element//*[regexp:test(@inkscape:label, $items_regex)]";
foreach "$unordered_items" {
const "elt_label","concat($prefix, string(position()))";
const "elt","$unordered_items[@inkscape:label = $elt_label]";
const "pos","position()";
const "item_path", "$items_paths[$pos]";
| [ /* item="«$elt_label»" path="«$item_path»" */
if "count($elt)=0" error > Missing item labeled «$elt_label» in ForEach widget «$hmi_element/@id»
foreach "func:refered_elements($elt)[@id = $hmi_elements/@id][not(@id = $elt/@id)]" {
if "not(func:is_descendant_path(func:widget(@id)/path/@value, $item_path))"
error > Widget id="«@id»" label="«@inkscape:label»" is having wrong path. Accroding to ForEach widget ancestor id="«$hmi_element/@id»", path should be descendant of "«$item_path»".
| hmi_widgets["«@id»"]`if "position()!=last()" > ,`
}
| ]`if "position()!=last()" > ,`
}
| ]
| },
| item_offset: 0,
}
template "widget[@type='ForEach']", mode="widget_class"
||
class ForEachWidget extends Widget{
unsub_items(){
for(let item of this.items){
for(let widget of item) {
widget.unsub();
}
}
}
unsub(){
this.unsub_items();
this.offset = 0;
this.relativeness = undefined;
}
sub_items(){
for(let i = 0; i < this.items.length; i++) {
let item = this.items[i];
let orig_item_index = this.index_pool[i];
let item_index = this.index_pool[i+this.item_offset];
let item_index_offset = item_index - orig_item_index;
if(this.relativeness[0])
item_index_offset += this.offset;
for(let widget of item) {
/* all variables of all widgets in a ForEach are all relative.
Really.
TODO: allow absolute variables in ForEach widgets
*/
widget.sub(item_index_offset, widget.indexes.map(_=>true));
}
}
}
sub(new_offset=0, relativeness=[]){
this.offset = new_offset;
this.relativeness = relativeness;
this.sub_items();
}
apply_cache() {
this.items.forEach(item=>item.forEach(widget=>widget.apply_cache()));
}
on_click(opstr, evt) {
let new_item_offset = eval(String(this.item_offset)+opstr);
if(new_item_offset + this.items.length > this.index_pool.length) {
if(this.item_offset + this.items.length == this.index_pool.length)
new_item_offset = 0;
else
new_item_offset = this.index_pool.length - this.items.length;
} else if(new_item_offset < 0) {
if(this.item_offset == 0)
new_item_offset = this.index_pool.length - this.items.length;
else
new_item_offset = 0;
}
this.item_offset = new_item_offset;
this.unsub_items();
this.sub_items();
update_subscriptions();
need_cache_apply.push(this);
jumps_need_update = true;
requestHMIAnimation();
}
}
||