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34 lines
880 B
JavaScript
34 lines
880 B
JavaScript
Cu.import("resource://gre/modules/Promise.jsm");
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const SINGLE_TRY_TIMEOUT = 100;
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const NUMBER_OF_TRIES = 30;
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function waitForConditionPromise(condition, timeoutMsg, tryCount=NUMBER_OF_TRIES) {
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let defer = Promise.defer();
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let tries = 0;
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function checkCondition() {
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if (tries >= tryCount) {
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defer.reject(timeoutMsg);
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}
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var conditionPassed;
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try {
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conditionPassed = condition();
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} catch (e) {
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return defer.reject(e);
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}
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if (conditionPassed) {
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return defer.resolve();
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}
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tries++;
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setTimeout(checkCondition, SINGLE_TRY_TIMEOUT);
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}
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setTimeout(checkCondition, SINGLE_TRY_TIMEOUT);
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return defer.promise;
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}
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function waitForCondition(condition, nextTest, errorMsg) {
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waitForConditionPromise(condition, errorMsg).then(nextTest, (reason) => {
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ok(false, reason + (reason.stack ? "\n" + e.stack : ""));
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});
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}
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