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‎.github/workflows/swift.yml‎

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name: Swift
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on:
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push:
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branches: [ master ]
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pull_request:
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branches: [ master ]
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jobs:
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build:
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runs-on: macos-latest
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steps:
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- uses: actions/checkout@v2
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- name: Build
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run: swift build -v
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- name: Run tests
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run: swift test -v

‎.gitignore‎

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.DS_Store
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/.build
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/Packages
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/*.xcodeproj
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xcuserdata/

‎.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata‎

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‎.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist‎

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>IDEDidComputeMac32BitWarning</key>
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<true/>
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</dict>
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</plist>

‎.swiftpm/xcode/xcshareddata/xcschemes/CardStack.xcscheme‎

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<?xml version="1.0" encoding="UTF-8"?>
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<Scheme
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LastUpgradeVersion = "1140"
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version = "1.3">
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<BuildAction
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parallelizeBuildables = "YES"
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buildImplicitDependencies = "YES">
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<BuildActionEntries>
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<BuildActionEntry
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buildForTesting = "YES"
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buildForRunning = "YES"
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buildForProfiling = "YES"
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buildForArchiving = "YES"
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buildForAnalyzing = "YES">
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<BuildableReference
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BuildableIdentifier = "primary"
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BlueprintIdentifier = "CardStack"
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BuildableName = "CardStack"
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BlueprintName = "CardStack"
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ReferencedContainer = "container:">
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</BuildableReference>
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</BuildActionEntry>
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<BuildActionEntry
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buildForTesting = "YES"
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buildForRunning = "YES"
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buildForProfiling = "NO"
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buildForArchiving = "NO"
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buildForAnalyzing = "YES">
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<BuildableReference
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BuildableIdentifier = "primary"
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BlueprintIdentifier = "CardStackTests"
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BuildableName = "CardStackTests"
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BlueprintName = "CardStackTests"
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ReferencedContainer = "container:">
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</BuildableReference>
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</BuildActionEntry>
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</BuildActionEntries>
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</BuildAction>
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<TestAction
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buildConfiguration = "Debug"
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selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
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selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
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shouldUseLaunchSchemeArgsEnv = "YES"
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codeCoverageEnabled = "YES">
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<Testables>
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<TestableReference
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skipped = "NO">
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<BuildableReference
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BuildableIdentifier = "primary"
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BlueprintIdentifier = "CardStackTests"
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BuildableName = "CardStackTests"
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BlueprintName = "CardStackTests"
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ReferencedContainer = "container:">
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</BuildableReference>
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</TestableReference>
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</Testables>
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</TestAction>
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<LaunchAction
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buildConfiguration = "Debug"
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selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
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selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
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launchStyle = "0"
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useCustomWorkingDirectory = "NO"
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ignoresPersistentStateOnLaunch = "NO"
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debugDocumentVersioning = "YES"
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debugServiceExtension = "internal"
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allowLocationSimulation = "YES">
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</LaunchAction>
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<ProfileAction
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buildConfiguration = "Release"
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shouldUseLaunchSchemeArgsEnv = "YES"
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savedToolIdentifier = ""
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useCustomWorkingDirectory = "NO"
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debugDocumentVersioning = "YES">
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<MacroExpansion>
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<BuildableReference
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BuildableIdentifier = "primary"
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BlueprintIdentifier = "CardStack"
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BuildableName = "CardStack"
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BlueprintName = "CardStack"
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ReferencedContainer = "container:">
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</BuildableReference>
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</MacroExpansion>
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</ProfileAction>
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<AnalyzeAction
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buildConfiguration = "Debug">
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</AnalyzeAction>
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<ArchiveAction
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buildConfiguration = "Release"
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revealArchiveInOrganizer = "YES">
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</ArchiveAction>
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</Scheme>

‎LICENSE‎

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MIT License
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Copyright (c) 2020 Deniz Adalar
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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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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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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 THE
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SOFTWARE.

‎Package.resolved‎

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‎Package.swift‎

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// swift-tools-version:5.1
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import PackageDescription
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let package = Package(
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name: "CardStack",
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platforms: [
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.iOS(.v13),
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.watchOS(.v6),
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.macOS(.v10_15)
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],
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products: [
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.library(name: "CardStack", targets: ["CardStack"])
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],
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dependencies: [
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.package(url: "https://github.com/pointfreeco/swift-snapshot-testing.git", from: "1.7.2")
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],
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targets: [
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.target(name: "CardStack", dependencies: []),
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.testTarget(name: "CardStackTests", dependencies: ["CardStack", "SnapshotTesting"])
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]
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)

‎README.md‎

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# CardStack
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A description of this package.

‎Sources/CardStack/CardStack.swift‎

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import SwiftUI
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public struct CardStack<Direction, ID: Hashable, Data: RandomAccessCollection, Content: View>: View where Data.Index: Hashable {
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@Environment(\.cardStackConfiguration) private var configuration: CardStackConfiguration
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@State private var currentIndex: Data.Index
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private let direction: (Double) -> Direction?
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private let data: Data
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private let id: KeyPath<Data.Element, ID>
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private let onSwipe: (Direction) -> ()
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private let content: (Data.Element, Direction?, Bool) -> Content
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public init(
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direction: @escaping (Double) -> Direction?,
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data: Data,
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id: KeyPath<Data.Element, ID>,
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onSwipe: @escaping (Direction) -> (),
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@ViewBuilder content: @escaping (Data.Element, Direction?, Bool) -> Content
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) {
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self.direction = direction
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self.data = data
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self.id = id
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self.onSwipe = onSwipe
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self.content = content
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self._currentIndex = State<Data.Index>(initialValue: data.startIndex)
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}
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public var body: some View {
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ZStack {
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ForEach(data.indices.reversed(), id: \.self) { index -> AnyView in
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let relativeIndex = self.data.distance(from: self.currentIndex, to: index)
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if relativeIndex >= 0 && relativeIndex < self.configuration.maxVisibleCards {
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return AnyView(self.card(index: index, relativeIndex: relativeIndex))
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} else {
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return AnyView(EmptyView())
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}
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}
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}
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}
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private func card(index: Data.Index, relativeIndex: Int) -> some View {
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CardView(
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direction: direction,
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isOnTop: relativeIndex == 0,
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onSwipe: { direction in
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self.currentIndex = self.data.index(after: index)
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self.onSwipe(direction)
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},
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content: { direction in
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self.content(self.data[index], direction, relativeIndex == 0)
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.offset(
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x: 0,
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y: CGFloat(relativeIndex) * self.configuration.cardOffset
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)
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.scaleEffect(
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1 - self.configuration.cardScale * CGFloat(relativeIndex),
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anchor: .bottom
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)
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}
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)
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}
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}
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public extension CardStack where Data.Element: Identifiable, ID == Data.Element.ID {
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init(
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direction: @escaping (Double) -> Direction?,
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data: Data,
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onSwipe: @escaping (Direction) -> (),
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@ViewBuilder content: @escaping (Data.Element, Direction?, Bool) -> Content
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) {
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self.init(
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direction: direction,
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data: data,
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id: \Data.Element.id,
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onSwipe: onSwipe,
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content: content
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)
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}
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}
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public extension CardStack where Data.Element: Hashable, ID == Data.Element {
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init(
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direction: @escaping (Double) -> Direction?,
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data: Data,
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onSwipe: @escaping (Direction) -> (),
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@ViewBuilder content: @escaping (Data.Element, Direction?, Bool) -> Content
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) {
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self.init(
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direction: direction,
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data: data,
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id: \Data.Element.self,
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onSwipe: onSwipe,
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content: content
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)
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}
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}

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