150 lines
3.9 KiB
JavaScript
150 lines
3.9 KiB
JavaScript
HackTimer = function () {
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try {
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var blob = new Blob (["\
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var fakeIdToId = {};\
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onmessage = function (event) {\
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var data = event.data,\
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name = data.name,\
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fakeId = data.fakeId,\
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time;\
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if(data.hasOwnProperty('time')) {\
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time = data.time;\
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}\
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switch (name) {\
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case 'setInterval':\
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fakeIdToId[fakeId] = setInterval(function () {\
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postMessage({fakeId: fakeId});\
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}, time);\
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break;\
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case 'clearInterval':\
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if (fakeIdToId.hasOwnProperty (fakeId)) {\
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clearInterval(fakeIdToId[fakeId]);\
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delete fakeIdToId[fakeId];\
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}\
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break;\
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case 'setTimeout':\
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fakeIdToId[fakeId] = setTimeout(function () {\
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postMessage({fakeId: fakeId});\
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if (fakeIdToId.hasOwnProperty (fakeId)) {\
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delete fakeIdToId[fakeId];\
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}\
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}, time);\
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break;\
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case 'clearTimeout':\
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if (fakeIdToId.hasOwnProperty (fakeId)) {\
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clearTimeout(fakeIdToId[fakeId]);\
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delete fakeIdToId[fakeId];\
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}\
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break;\
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}\
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}\
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"]);
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// Obtain a blob URL reference to our worker 'file'.
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workerScript = window.URL.createObjectURL(blob);
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} catch (error) {
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/* Blob is not supported, use external script instead */
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console.log(logPrefix + 'Initialisation failed: Blob is not supported!')
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return;
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}
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var worker,
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fakeIdToCallback = {},
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lastFakeId = 0,
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maxFakeId = 0x7FFFFFFF, // 2 ^ 31 - 1, 31 bit, positive values of signed 32 bit integer
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logPrefix = 'HackTimer.js by turuslan: ';
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if (typeof (Worker) !== 'undefined') {
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function getFakeId () {
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do {
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if (lastFakeId == maxFakeId) {
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lastFakeId = 0;
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} else {
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lastFakeId ++;
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}
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} while (fakeIdToCallback.hasOwnProperty (lastFakeId));
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return lastFakeId;
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}
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try {
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worker = new Worker (workerScript);
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window.setInterval = function (callback, time /* , parameters */) {
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var fakeId = getFakeId ();
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fakeIdToCallback[fakeId] = {
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callback: callback,
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parameters: Array.prototype.slice.call(arguments, 2)
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};
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worker.postMessage ({
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name: 'setInterval',
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fakeId: fakeId,
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time: time
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});
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return fakeId;
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};
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window.clearInterval = function (fakeId) {
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if (fakeIdToCallback.hasOwnProperty(fakeId)) {
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delete fakeIdToCallback[fakeId];
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worker.postMessage ({
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name: 'clearInterval',
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fakeId: fakeId
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});
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}
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};
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window.setTimeout = function (callback, time /* , parameters */) {
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var fakeId = getFakeId ();
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fakeIdToCallback[fakeId] = {
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callback: callback,
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parameters: Array.prototype.slice.call(arguments, 2),
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isTimeout: true
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};
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worker.postMessage ({
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name: 'setTimeout',
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fakeId: fakeId,
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time: time
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});
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return fakeId;
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};
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window.clearTimeout = function (fakeId) {
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if (fakeIdToCallback.hasOwnProperty(fakeId)) {
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delete fakeIdToCallback[fakeId];
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worker.postMessage ({
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name: 'clearTimeout',
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fakeId: fakeId
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});
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}
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};
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worker.onmessage = function (event) {
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var data = event.data,
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fakeId = data.fakeId,
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request,
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parameters,
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callback;
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if (fakeIdToCallback.hasOwnProperty(fakeId)) {
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request = fakeIdToCallback[fakeId];
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callback = request.callback;
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parameters = request.parameters;
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if (request.hasOwnProperty ('isTimeout') && request.isTimeout) {
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delete fakeIdToCallback[fakeId];
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}
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}
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if (typeof (callback) === 'string') {
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try {
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callback = new Function (callback);
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} catch (error) {
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console.log (logPrefix + 'Error parsing callback code string: ', error);
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}
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}
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if (typeof (callback) === 'function') {
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callback.apply (window, parameters);
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}
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};
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worker.onerror = function (event) {
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console.log (event);
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};
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console.log (logPrefix + 'Initialisation succeeded');
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} catch (error) {
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console.log (logPrefix + 'Initialisation failed');
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console.error (error);
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}
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} else {
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console.log (logPrefix + 'Initialisation failed - HTML5 Web Worker is not supported');
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}
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};
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HackTimer();
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