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+//
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+// Indicator.swift
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+// Kingfisher
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+//
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+// Created by João D. Moreira on 30/08/16.
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+//
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+// Copyright (c) 2016 Wei Wang <onevcat@gmail.com>
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+//
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+// Permission is hereby granted, free of charge, to any person obtaining a copy
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+// of this software and associated documentation files (the "Software"), to deal
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+// in the Software without restriction, including without limitation the rights
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+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+// copies of the Software, and to permit persons to whom the Software is
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+// furnished to do so, subject to the following conditions:
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+//
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+// The above copyright notice and this permission notice shall be included in
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+// all copies or substantial portions of the Software.
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+//
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+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+// THE SOFTWARE.
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+
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+#if os(OSX)
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+ import AppKit
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+#else
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+ import UIKit
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+#endif
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+
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+#if os(OSX)
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+ public typealias IndicatorView = NSView
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+#else
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+ public typealias IndicatorView = UIView
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+#endif
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+
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+// MARK: - Indicator Protocol
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+public protocol Indicator {
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+ func startAnimatingView()
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+ func stopAnimatingView()
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+
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+ var viewCenter: CGPoint { get set }
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+ var view: IndicatorView { get }
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+}
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+
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+extension Indicator {
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+ #if os(OSX)
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+ var viewCenter: CGPoint {
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+ get {
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+ let frame = view.frame
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+ return CGPoint(x: frame.origin.x + frame.size.width / 2.0, y: frame.origin.y + frame.size.height / 2.0 )
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+ }
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+ set {
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+ let frame = view.frame
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+ let newFrame = CGRect(x: newValue.x - frame.size.width / 2.0,
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+ y: newValue.y - frame.size.height / 2.0,
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+ width: frame.size.width,
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+ height: frame.size.height)
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+ view.frame = newFrame
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+ }
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+ }
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+ #else
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+ var viewCenter: CGPoint {
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+ get {
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+ return view.center
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+ }
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+ set {
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+ view.center = newValue
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+ }
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+ }
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+ #endif
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+}
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+
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+// MARK: - ActivityIndicator
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+// Displays a NSProgressIndicator / UIActivityIndicatorView
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+struct ActivityIndicator: Indicator {
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+
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+ #if os(OSX)
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+ private let activityIndicatorView: NSProgressIndicator
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+ #else
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+ private let activityIndicatorView: UIActivityIndicatorView
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+ #endif
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+
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+ var view: IndicatorView {
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+ return activityIndicatorView
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+ }
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+
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+ func startAnimatingView() {
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+ #if os(OSX)
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+ activityIndicatorView.startAnimation(nil)
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+ #else
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+ activityIndicatorView.startAnimating()
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+ #endif
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+ activityIndicatorView.hidden = false
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+ }
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+
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+ func stopAnimatingView() {
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+ #if os(OSX)
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+ activityIndicatorView.stopAnimation(nil)
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+ #else
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+ activityIndicatorView.stopAnimating()
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+ #endif
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+ activityIndicatorView.hidden = true
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+ }
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+
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+ init() {
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+ #if os(OSX)
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+ activityIndicatorView = NSProgressIndicator(frame: CGRect(x: 0, y: 0, width: 16, height: 16))
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+
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+ #if swift(>=2.3)
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+ activityIndicatorView.controlSize = .Small
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+ #else
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+ activityIndicatorView.controlSize = .SmallControlSize
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+ #endif
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+ activityIndicatorView.style = .SpinningStyle
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+ #else
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+ #if os(tvOS)
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+ let indicatorStyle = UIActivityIndicatorViewStyle.White
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+ #else
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+ let indicatorStyle = UIActivityIndicatorViewStyle.Gray
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+ #endif
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+ activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle:indicatorStyle)
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+ activityIndicatorView.autoresizingMask = [.FlexibleLeftMargin, .FlexibleRightMargin, .FlexibleBottomMargin, .FlexibleTopMargin]
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+ #endif
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+ }
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+}
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+
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+// MARK: - ImageIndicator
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+// Displays an ImageView. Supports gif
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+struct ImageIndicator: Indicator {
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+ private let animatedImageIndicatorView: ImageView
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+
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+ var view: IndicatorView {
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+ return animatedImageIndicatorView
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+ }
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+
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+ init(imageData data: NSData) {
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+
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+ let image = Image.kf_imageWithData(data, scale: 1.0, preloadAllGIFData: true)
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+ animatedImageIndicatorView = ImageView()
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+ animatedImageIndicatorView.image = image
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+
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+ #if os(OSX)
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+ // Need for gif to animate on OSX
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+ self.animatedImageIndicatorView.imageScaling = .ScaleNone
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+ self.animatedImageIndicatorView.canDrawSubviewsIntoLayer = true
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+ #else
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+ animatedImageIndicatorView.contentMode = .Center
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+
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+ animatedImageIndicatorView.autoresizingMask = [.FlexibleLeftMargin,
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+ .FlexibleRightMargin,
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+ .FlexibleBottomMargin,
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+ .FlexibleTopMargin]
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+ #endif
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+ }
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+
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+ func startAnimatingView() {
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+ #if os(OSX)
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+ animatedImageIndicatorView.animates = true
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+ #else
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+ animatedImageIndicatorView.startAnimating()
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+ #endif
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+ animatedImageIndicatorView.hidden = false
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+ }
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+
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+ func stopAnimatingView() {
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+ #if os(OSX)
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+ animatedImageIndicatorView.animates = false
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+ #else
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+ animatedImageIndicatorView.stopAnimating()
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+ #endif
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+ animatedImageIndicatorView.hidden = true
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+ }
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+}
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onevcat
