70 lines
1.6 KiB
Swift
70 lines
1.6 KiB
Swift
import ExpoModulesCore
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class VisibilityView: ExpoView {
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var enabled = false {
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didSet {
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if enabled {
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VisibilityViewManager.shared.removeView(self)
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}
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}
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}
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private let onChangeStatus = EventDispatcher()
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private var isCurrentlyActiveView = false
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required init(appContext: AppContext? = nil) {
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super.init(appContext: appContext)
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}
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public override func willMove(toWindow newWindow: UIWindow?) {
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super.willMove(toWindow: newWindow)
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if !self.enabled {
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return
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}
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if newWindow == nil {
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VisibilityViewManager.shared.removeView(self)
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} else {
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VisibilityViewManager.shared.addView(self)
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}
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}
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func setIsCurrentlyActive(isActive: Bool) {
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if isCurrentlyActiveView == isActive {
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return
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}
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self.isCurrentlyActiveView = isActive
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self.onChangeStatus([
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"isActive": isActive
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])
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}
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}
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// 🚨 DANGER 🚨
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// These functions need to be called from the main thread. Xcode will warn you if you call one of them
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// off the main thread, so pay attention!
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extension UIView {
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func getPositionOnScreen() -> CGRect? {
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if let window = self.window {
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return self.convert(self.bounds, to: window)
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}
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return nil
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}
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func isViewableEnough() -> Bool {
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guard let window = self.window else {
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return false
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}
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let viewFrameOnScreen = self.convert(self.bounds, to: window)
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let screenBounds = window.bounds
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let intersection = viewFrameOnScreen.intersection(screenBounds)
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let viewHeight = viewFrameOnScreen.height
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let intersectionHeight = intersection.height
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return intersectionHeight >= 0.5 * viewHeight
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}
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}
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