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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // | ||
| // This source file is part of the Stanford Spezi open-source project | ||
| // | ||
| // SPDX-FileCopyrightText: 2024 Stanford University and the project authors (see CONTRIBUTORS.md) | ||
| // | ||
| // SPDX-License-Identifier: MIT | ||
| // | ||
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| import SwiftUI | ||
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| extension View { | ||
| /// Applies the given transform if the given condition evaluates to `true`. | ||
| /// | ||
| /// ### Usage | ||
| /// | ||
| /// ```swift | ||
| /// struct ConditionalModifierTestView: View { | ||
| /// @State var condition = false | ||
| /// | ||
| /// var body: some View { | ||
| /// VStack { | ||
| /// Text("Condition present") | ||
| /// .if(condition) { view in | ||
| /// view | ||
| /// .hidden() | ||
| /// } | ||
| /// | ||
| /// Button("Toggle Condition") { | ||
| /// condition.toggle() | ||
| /// } | ||
| /// } | ||
| /// } | ||
| /// } | ||
| /// ``` | ||
| /// | ||
| /// - Parameters: | ||
| /// - condition: The condition to evaluate. | ||
| /// - transform: The transform to apply to the source `View`. | ||
| /// - Returns: Either the original `View` or the modified `View` if the condition is `true`. | ||
| @ViewBuilder public func `if`<Content: View>(_ condition: Bool, transform: (Self) -> Content) -> some View { | ||
| if condition { | ||
| transform(self) | ||
| } else { | ||
| self | ||
| } | ||
| } | ||
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| /// Applies the given transform if the given condition closure evaluates to `true`. | ||
| /// | ||
| /// ### Usage | ||
| /// | ||
| /// ```swift | ||
| /// struct ConditionalModifierTestView: View { | ||
| /// @State var closureCondition = false | ||
| /// | ||
| /// var body: some View { | ||
| /// VStack { | ||
| /// Text("Closure Condition present") | ||
| /// .if(condition: { | ||
| /// closureCondition | ||
| /// }, transform: { view in | ||
| /// view | ||
| /// .hidden() | ||
| /// }) | ||
| /// | ||
| /// Button("Toggle Closure Condition") { | ||
| /// closureCondition.toggle() | ||
| /// } | ||
| /// } | ||
| /// } | ||
| /// } | ||
| /// ``` | ||
| /// | ||
| /// - Parameters: | ||
| /// - condition: The condition closure to evaluate. | ||
| /// - transform: The transform to apply to the source `View`. | ||
| /// - Returns: Either the original `View` or the modified `View` if the condition closure is `true`. | ||
| @ViewBuilder public func `if`<Content: View>(condition: () -> Bool, transform: (Self) -> Content) -> some View { | ||
| if condition() { | ||
| transform(self) | ||
| } else { | ||
| self | ||
| } | ||
| } | ||
| } |
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54 changes: 54 additions & 0 deletions
54
Tests/UITests/TestApp/ViewsTests/ConditionalModifierTestView.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| // | ||
| // This source file is part of the Stanford Spezi open-source project | ||
| // | ||
| // SPDX-FileCopyrightText: 2022 Stanford University and the project authors (see CONTRIBUTORS.md) | ||
| // | ||
| // SPDX-License-Identifier: MIT | ||
| // | ||
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| import SpeziViews | ||
| import SwiftUI | ||
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| struct ConditionalModifierTestView: View { | ||
| @State var condition = false | ||
| @State var closureCondition = false | ||
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| var body: some View { | ||
| VStack { | ||
| Text("Condition present") | ||
| .if(condition) { view in | ||
| view | ||
| .hidden() | ||
| } | ||
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| Button("Toggle Condition") { | ||
| condition.toggle() | ||
| } | ||
| .buttonStyle(.borderedProminent) | ||
| .padding(.bottom, 20) | ||
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| Divider() | ||
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| Text("Closure Condition present") | ||
| .if(condition: { | ||
| closureCondition | ||
| }, transform: { view in | ||
| view | ||
| .hidden() | ||
| }) | ||
| .padding(.top, 20) | ||
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| Button("Toggle Closure Condition") { | ||
| condition.toggle() | ||
| } | ||
| .buttonStyle(.borderedProminent) | ||
| } | ||
| } | ||
| } | ||
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| #Preview { | ||
| ConditionalModifierTestView() | ||
| } |
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