Add API for screenshots #70
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…ith one bug remaining Native screenshots are working, but the catpureNextRepaint() function doesn't yet capture the next repaint; it takes a screenshot before the next repaint
…to use functional approach ScreenshotStream now uses the functional approach that the rest of Trrack uses instead of OO/class based
Adds an API to the event registry allowing users to define whether actions should trigger screenshots and the associated delay. Adds an API to the trrack object for screenshots.
…eenshots available Also updates react-trrack-example to match
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This adds an API for taking screenshots of the current tab manually and when certain actions are trracked.
The
ScreenshotStreaminterface defines an API for capturing screenshots. Screenshots are taken via theMediaDevicesAPI, specifically thegetDisplayMedia()function. After starting a stream of frames from the browser, individual shots can be saved at any point, either manually or when triggering actions fire.The
RegistryAPI has been updated to add 2 fields:triggersScreenshot, which defines whether an action should fire a screenshot, andtransitionTime, which defines how long it takes for an action to be reflected in the visualization and therefore the delay before screenshotting.The
Trrackobject has been updated with a new field,screenshots, an instance ofScreenshotStream. This exposes methods for starting capture (necessary to obtain a stream of frames from the browser), which asks the user for permission to share the current tab. There are also methods to capture a screenshot immediately, capture after a delay, stop theMediaStreamthat provides frames from the screenshare, and get saved screenshots. The current implementation of ScreenshotStream saves all captured screenshots to an array. The Trrack object does not take screenshots due to actions withtriggersScreenshot = trueuntil the ScreenshotStream has been started.