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fda6c1a37662

Tests: Add preliminary IEC-61131 language test, to be continued.

Test sets BEREMIZ_TEST_CYCLES in order to speed-up TON duration test.

// widget_back.ysl2

widget_desc("Back") {

longdesc

Back widget brings focus back to previous page in history when clicked.

shortdesc > Jump to previous page

}

widget_class("Back")

on_click(evt) {

if(jump_history.length > 1){

let page_name, index;

do {

jump_history.pop(); // forget current page

if(jump_history.length == 0) return;

[page_name, index] = jump_history[jump_history.length-1];

} while(page_name == "ScreenSaver") // never go back to ScreenSaver

switch_page(page_name, index);

}

init() {

this.element.onclick = this.on_click.bind(this);

}