75 lines
2.7 KiB
JavaScript
75 lines
2.7 KiB
JavaScript
const ipcMain = require('electron').ipcMain;
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const desktopCapturer = process.atomBinding('desktop_capturer').desktopCapturer;
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var deepEqual = function(opt1, opt2) {
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return JSON.stringify(opt1) === JSON.stringify(opt2);
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};
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// A queue for holding all requests from renderer process.
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var requestsQueue = [];
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ipcMain.on('ATOM_BROWSER_DESKTOP_CAPTURER_GET_SOURCES', function(event, captureWindow, captureScreen, thumbnailSize, id) {
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var request;
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request = {
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id: id,
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options: {
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captureWindow: captureWindow,
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captureScreen: captureScreen,
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thumbnailSize: thumbnailSize
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},
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webContents: event.sender
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};
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requestsQueue.push(request);
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if (requestsQueue.length === 1) {
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desktopCapturer.startHandling(captureWindow, captureScreen, thumbnailSize);
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}
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// If the WebContents is destroyed before receiving result, just remove the
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// reference from requestsQueue to make the module not send the result to it.
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return event.sender.once('destroyed', function() {
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return request.webContents = null;
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});
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});
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desktopCapturer.emit = function(event, name, sources) {
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// Receiving sources result from main process, now send them back to renderer.
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var captureScreen, captureWindow, handledRequest, i, len, ref, ref1, ref2, request, result, source, thumbnailSize, unhandledRequestsQueue;
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handledRequest = requestsQueue.shift(0);
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result = (function() {
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var i, len, results;
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results = [];
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for (i = 0, len = sources.length; i < len; i++) {
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source = sources[i];
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results.push({
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id: source.id,
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name: source.name,
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thumbnail: source.thumbnail.toDataUrl()
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});
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}
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return results;
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})();
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if ((ref = handledRequest.webContents) != null) {
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ref.send("ATOM_RENDERER_DESKTOP_CAPTURER_RESULT_" + handledRequest.id, result);
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}
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// Check the queue to see whether there is other same request. If has, handle
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// it for reducing redunplicated `desktopCaptuer.startHandling` calls.
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unhandledRequestsQueue = [];
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for (i = 0, len = requestsQueue.length; i < len; i++) {
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request = requestsQueue[i];
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if (deepEqual(handledRequest.options, request.options)) {
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if ((ref1 = request.webContents) != null) {
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ref1.send("ATOM_RENDERER_DESKTOP_CAPTURER_RESULT_" + request.id, result);
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}
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} else {
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unhandledRequestsQueue.push(request);
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}
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}
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requestsQueue = unhandledRequestsQueue;
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// If the requestsQueue is not empty, start a new request handling.
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if (requestsQueue.length > 0) {
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ref2 = requestsQueue[0].options, captureWindow = ref2.captureWindow, captureScreen = ref2.captureScreen, thumbnailSize = ref2.thumbnailSize;
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return desktopCapturer.startHandling(captureWindow, captureScreen, thumbnailSize);
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}
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};
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