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listen-macro.js
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listen-macro.js
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/* Mali's <<listen>> macro for Sgarcube */
Macro.add('listen', {
tags: ['when'],
isAsync: true,
argsToObj: function(args) {
let argObject = {},
i = 0;
while (i < args.length) {
const arg = args[i];
if (Array.isArray(arg)) { //An array, splice into position
args.splice(i--, 1, ...arg);
} else if (typeof arg === 'object') { //Merge objects!
Object.assign(argObject, arg);
} else { //Following pairs
const val = args[i += 1];
if (val === undefined) {
throw new Error('Uneven number of arguments.')
};
argObject[arg.toLowerCase()] = val;
}
i++;
}
return argObject;
},
handler() {
const payloads = {},
events = [],
attr = this.self.argsToObj(this.args),
st = State.temporary,
$wr = $(`<${attr.type || 'span'}>`).wiki(this.payload[0].contents);
delete attr.type;
let oldEvent, $trg = $wr;
if (attr.hasOwnProperty('filter')) {
$trg = $wr.find(attr.filter);
delete attr.filter;
}
this.payload.slice(1).forEach(tag => {
let ev = ['change'];
if (tag.args.length) {
ev = tag.args.flat(Infinity).map(t => t.split(/\s|,/g)).flat().filter(t => t);
}
ev.forEach(e => {
payloads[e] = tag.contents;
events.push(e);
});
});
$trg.on(events.join(' '), this.createShadowWrapper(e => {
try {
oldEvent = st.event;
st.event = e.originalEvent ?? e;
$.wiki(payloads[e.type]);
} finally {
oldEvent !== undefined ? st.event = oldEvent : delete st.event;
}
}));
$wr.attr(attr).addClass(`macro-${this.name}`).appendTo(this.output);
}
});