67 lines
1.8 KiB
Swift
67 lines
1.8 KiB
Swift
// Copyright 2020-2021 Tokamak contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import Foundation
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import TokamakCore
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public enum SpacerContainerAxis {
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case horizontal, vertical
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}
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public protocol SpacerContainer {
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var hasSpacer: Bool { get }
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var axis: SpacerContainerAxis { get }
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var fillCrossAxis: Bool { get }
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}
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public extension SpacerContainer where Self: ParentView {
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var hasSpacer: Bool {
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children
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.compactMap {
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mapAnyView($0) { (v: Spacer) in
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v
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}
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}
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.count > 0 ||
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children.compactMap {
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mapAnyView($0) { (v: SpacerContainer) in
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v
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}
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}
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.filter { $0.axis == axis && $0.hasSpacer }
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.count > 0
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}
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// Does a child SpacerContainer along the opposite axis have a spacer?
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// (e.g., an HStack with a child VStack which contains a spacer)
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// If so, we need to fill the cross-axis so the child can show the correct layout.
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var fillCrossAxis: Bool {
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children
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.compactMap {
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mapAnyView($0) { (v: SpacerContainer) in v }
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}
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.filter { $0.axis != axis && $0.hasSpacer }
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.count > 0
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}
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}
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extension Spacer: _HTMLPrimitive {
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@_spi(TokamakStaticHTML)
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public var renderedBody: AnyView {
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AnyView(HTML("div", [
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"style": "flex-grow: 1; \(minLength != nil ? "min-width: \(minLength!);" : "")",
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]))
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}
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}
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