38 lines
1.7 KiB
CoffeeScript
38 lines
1.7 KiB
CoffeeScript
ipc = require 'ipc'
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# The browser module manages all desktop-capturer moduels in renderer process.
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desktopCapturer = process.atomBinding('desktop_capturer').desktopCapturer
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isOptionsEqual = (opt1, opt2) ->
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return JSON.stringify opt1 is JSON.stringify opt2
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# A queue for holding all requests from renderer process.
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requestsQueue = []
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ipc.on 'ATOM_BROWSER_DESKTOP_CAPTURER_GET_SOURCES', (event, options) ->
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request = { options: options, webContents: event.sender }
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desktopCapturer.startHandling options if requestsQueue.length is 0
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requestsQueue.push request
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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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event.sender.once 'destroyed', () ->
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request.webContents = null
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desktopCapturer.emit = (event_name, event, sources) ->
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# Receiving sources result from main process, now send them back to renderer.
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handledRequest = requestsQueue.shift 0
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result = ({ id: source.id, name: source.name, thumbnail: source.thumbnail.toDataUrl() } for source in sources)
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handledRequest.webContents?.send 'ATOM_REDNERER_DESKTOP_CAPTURER_RESULT', result
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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 request in requestsQueue
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if isOptionsEqual handledRequest.options, request.options
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request.webContents?.send 'ATOM_REDNERER_DESKTOP_CAPTURER_RESULT', result
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else
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unhandledRequestsQueue.push request
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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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desktopCapturer.startHandling requestsQueue[0].options
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