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Cycle operator and refactored toggle operator (#5021)

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* Refactored toggle operator and added cycle operator

* Better handling for operand case

* Syntax/whitespace corrections
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saqimtiaz 2020-11-16 18:02:04 +01:00 committed by GitHub
parent 43061e64a6
commit fc1721709a
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1 changed files with 38 additions and 21 deletions
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59
core/modules/filters/x-listops.js
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@ -188,27 +188,44 @@ Extended filter operators to manipulate the current list.
return set;
};
/*
Toggles an item in the current list.
*/
exports.toggle = function(source, operator) {
var results = prepare_results(source),
index = results.indexOf(operator.operand),
pairIndex = (operator.operands[1] ? results.indexOf(operator.operands[1]) : -1);
if(index === -1) {
if(pairIndex !== -1) {
results.splice(pairIndex,1,operator.operand);
} else {
results.push(operator.operand);
}
} else {
if(operator.operands[1]) {
results.splice(index,1,operator.operands[1]);
} else {
results.splice(index,1);
var cycleValueInArray = function(results,operands) {
var resultsIndex,
i = 0,
nextOperandIndex;
for(i; i < operands.length; i++) {
resultsIndex = results.indexOf(operands[i]);
if(resultsIndex !== -1) {
break;
}
}
return results;
};
if(resultsIndex !== -1) {
i++;
nextOperandIndex = (i === operands.length ? 0 : i);
if(operands.length > 1) {
results.splice(resultsIndex,1,operands[nextOperandIndex]);
} else {
results.splice(resultsIndex,1,);
}
} else {
results.push(operands[0]);
}
return results;
}
})();
/*
Toggles an item in the current list.
*/
exports.toggle = function(source,operator) {
return cycleValueInArray(prepare_results(source),operator.operands);
}
exports.cycle = function(source,operator) {
var results = prepare_results(source),
operands = (operator.operand.length ? $tw.utils.parseStringArray(operator.operand, "true") : [""]);
if(operator.suffix === "reverse") {
operands.reverse();
}
return cycleValueInArray(results,operands);
}
})();