66import UIKit
77import PlaygroundSupport
88
9- public class BaseViewController : UIViewController , PlaygroundLiveViewSafeAreaContainer ,
10- ImagePickerViewControllerDelegate , ToolBarButtonViewDelegate {
11-
12- @IBOutlet weak var backgroundImageView : UIImageView !
13- @IBOutlet weak var showcaseImageCoontainerView : UIView !
9+ public class BaseViewController : UIViewController ,
10+ PlaygroundLiveViewSafeAreaContainer ,
11+ ImagePickerViewControllerDelegate ,
12+ ToolBarButtonViewDelegate ,
13+ PlaygroundLiveViewMessageHandler {
14+
15+ @IBOutlet private weak var backgroundImageView : UIImageView !
16+ @IBOutlet private weak var showcaseImageContainerView : UIView !
1417 @IBOutlet weak var showcaseImageView : ShowcaseImageView !
15-
16- @IBOutlet weak var toolBarContainerView : UIView !
18+
19+ @IBOutlet private weak var toolBarContainerView : UIView !
20+
21+ private weak var loadingIndicatorView : UIView !
1722
1823 var sourceImage : UIImage ?
1924
2025 var imagePickerController : ImagePickerViewController !
21-
26+
27+ var editorConnected = false
28+
2229 public override func viewDidLoad( ) {
2330 super. viewDidLoad ( )
2431
32+ setupLogoImageView ( )
33+ setupToolBarBlurView ( )
34+ setupProcessingIndicator ( )
35+
2536 backgroundImageView. contentMode = . scaleAspectFill
2637 backgroundImageView. image = UIImage ( named: " background-v2 " )
2738
2839 showcaseImageView. cornerRadius = 8.0
2940
30- setupLogoImageView ( )
31- setupToolBarBlurView ( )
41+ setLoadingIndicatorHidden ( true , animated: false )
3242 }
3343
3444 public override func prepare( for segue: UIStoryboardSegue , sender: Any ? ) {
@@ -46,24 +56,24 @@ public class BaseViewController: UIViewController, PlaygroundLiveViewSafeAreaCon
4656 }
4757 }
4858
49- func setupLogoImageView( ) {
59+ private func setupLogoImageView( ) {
5060 let logoImageView = UIImageView ( )
5161 logoImageView. image = UIImage ( named: " logo " )
5262 logoImageView. contentMode = . scaleAspectFit
53-
63+
5464 logoImageView. translatesAutoresizingMaskIntoConstraints = false
55- self . showcaseImageCoontainerView . insertSubview ( logoImageView, belowSubview: showcaseImageView)
65+ self . showcaseImageContainerView . insertSubview ( logoImageView, belowSubview: showcaseImageView)
5666
57- logoImageView. centerXAnchor. constraint ( equalTo: showcaseImageCoontainerView . centerXAnchor) . isActive = true
58- logoImageView. centerYAnchor. constraint ( equalTo: showcaseImageCoontainerView . centerYAnchor) . isActive = true
67+ logoImageView. centerXAnchor. constraint ( equalTo: showcaseImageContainerView . centerXAnchor) . isActive = true
68+ logoImageView. centerYAnchor. constraint ( equalTo: showcaseImageContainerView . centerYAnchor) . isActive = true
5969 logoImageView. widthAnchor. constraint ( equalToConstant: 420 ) . isActive = true
60- logoImageView. heightAnchor. constraint ( equalTo: showcaseImageCoontainerView . heightAnchor) . isActive = true
70+ logoImageView. heightAnchor. constraint ( equalTo: showcaseImageContainerView . heightAnchor) . isActive = true
6171 }
62-
63- func setupToolBarBlurView( ) {
72+
73+ private func setupToolBarBlurView( ) {
6474 let blurEffect = UIBlurEffect ( style: . dark)
6575 let blurView = UIVisualEffectView ( effect: blurEffect)
66-
76+
6777 blurView. translatesAutoresizingMaskIntoConstraints = false
6878 self . view. insertSubview ( blurView, aboveSubview: self . backgroundImageView)
6979
@@ -72,11 +82,72 @@ public class BaseViewController: UIViewController, PlaygroundLiveViewSafeAreaCon
7282 blurView. topAnchor. constraint ( equalTo: self . toolBarContainerView. topAnchor, constant: - 12 ) . isActive = true
7383 blurView. bottomAnchor. constraint ( equalTo: self . view. bottomAnchor) . isActive = true
7484 }
75-
85+
86+ private func setupProcessingIndicator( ) {
87+ let indicatorBackgroundView = UIView ( )
88+
89+ indicatorBackgroundView. backgroundColor = UIColor . black. withAlphaComponent ( 0.6 )
90+ indicatorBackgroundView. translatesAutoresizingMaskIntoConstraints = false
91+
92+ self . showcaseImageContainerView. addSubview ( indicatorBackgroundView)
93+
94+ indicatorBackgroundView. topAnchor. constraint ( equalTo: self . view. topAnchor) . isActive = true
95+ indicatorBackgroundView. leadingAnchor. constraint ( equalTo: self . view. leadingAnchor) . isActive = true
96+ indicatorBackgroundView. trailingAnchor. constraint ( equalTo: self . view. trailingAnchor) . isActive = true
97+ indicatorBackgroundView. bottomAnchor. constraint ( equalTo: self . view. bottomAnchor) . isActive = true
98+
99+ let indicatorContainerView = UIView ( )
100+
101+ indicatorContainerView. backgroundColor = . clear
102+ indicatorContainerView. translatesAutoresizingMaskIntoConstraints = false
103+ indicatorBackgroundView. addSubview ( indicatorContainerView)
104+
105+ indicatorContainerView. topAnchor. constraint ( equalTo: indicatorBackgroundView. topAnchor) . isActive = true
106+ indicatorContainerView. leadingAnchor. constraint ( equalTo: indicatorBackgroundView. leadingAnchor) . isActive = true
107+ indicatorContainerView. trailingAnchor. constraint ( equalTo: indicatorBackgroundView. trailingAnchor) . isActive = true
108+ indicatorContainerView. bottomAnchor. constraint ( equalTo: showcaseImageContainerView. bottomAnchor) . isActive = true
109+
110+ let progressIndicator = UIActivityIndicatorView ( style: . whiteLarge)
111+ progressIndicator. translatesAutoresizingMaskIntoConstraints = false
112+ indicatorContainerView. addSubview ( progressIndicator)
113+ progressIndicator. centerXAnchor. constraint ( equalTo: indicatorContainerView. centerXAnchor) . isActive = true
114+ progressIndicator. centerYAnchor. constraint ( equalTo: indicatorContainerView. centerYAnchor) . isActive = true
115+
116+ progressIndicator. startAnimating ( )
117+
118+ self . loadingIndicatorView = indicatorBackgroundView
119+ }
120+
76121 func updateShowcaseImage( image: UIImage ) {
77122 showcaseImageView. image = image
78123 }
79124
125+ private func setLoadingIndicatorHidden( _ hidden: Bool , animated: Bool ) {
126+ if loadingIndicatorView. isHidden == hidden {
127+ return
128+ }
129+ if animated {
130+ if loadingIndicatorView. isHidden && !hidden {
131+ loadingIndicatorView. alpha = 0.0
132+ loadingIndicatorView. isHidden = false
133+ }
134+ UIView . animate ( withDuration: 0.25 , delay: hidden ? 0.25 : 0 , animations: {
135+ self . loadingIndicatorView. alpha = hidden ? 0.0 : 1.0
136+ } , completion: { ( complete) in
137+ self . loadingIndicatorView. isHidden = hidden
138+ } )
139+ } else {
140+ loadingIndicatorView. isHidden = hidden
141+ }
142+ }
143+
144+ func send( _ message: PlaygroundSupport . PlaygroundValue , showLoadingView: Bool ) {
145+ if editorConnected && showLoadingView {
146+ setLoadingIndicatorHidden ( false , animated: true )
147+ }
148+ send ( message)
149+ }
150+
80151 func didSelectImage( image: UIImage , pickerController: ImagePickerViewController ) {
81152 sourceImage = image
82153 updateShowcaseImage ( image: image)
@@ -86,4 +157,28 @@ public class BaseViewController: UIViewController, PlaygroundLiveViewSafeAreaCon
86157
87158 }
88159
160+ public func liveViewMessageConnectionOpened( ) {
161+ editorConnected = true
162+ }
163+
164+ public func liveViewMessageConnectionClosed( ) {
165+ editorConnected = false
166+ setLoadingIndicatorHidden ( true , animated: true )
167+ }
168+
169+ public func receive( _ message: PlaygroundValue ) {
170+ guard let message = EventMessage . from ( playgroundValue: message) else {
171+ return
172+ }
173+ switch message {
174+ case . imageProcessingResponse( let image) :
175+ setLoadingIndicatorHidden ( true , animated: true )
176+ if let image = image {
177+ self . updateShowcaseImage ( image: image)
178+ }
179+ default :
180+ break
181+ }
182+ }
183+
89184}
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