Tools/MiniBrowserSwiftUI/WebKit_SwiftUI/Dialog.swift - WebKit - Git at Google

 /*
  * Copyright (C) 2020 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 import SwiftUI

 /// A dialog requested for display by some aspect of web content.
 public struct Dialog : Identifiable, Hashable {
     /// An opaque identifier for this dialog.
     public var id = ID()

     /// A configuration describing the purpose and contents of this dialog for display.
     public var configuration: Configuration

     /// Constructs a dialog from its component parts.
     public init(id: ID = ID(), _ configuration: Configuration) {
         self.id = id
         self.configuration = configuration
     }

     /// Constructs a dialog for a JavaScript `alert()`, which contains only a message to the user.
     /// - Parameters:
     ///   - id: An opaque identifier for the dialog.
     ///   - message: A message to display to the user.
     ///   - completion: A block to be invoked when the dialog has been dismissed. The webpage will
     ///   be paused until this block is invoked, and failure to invoke the block, or multiple
     ///   invocations will result in a runtime exception.
     public static func javaScriptAlert(
         id: ID = ID(), _ message: String, completion: @escaping () -> Void
     ) -> Self {
         Dialog(id: id, .javaScriptAlert(message, completion))
     }

     /// Constructs a dialog for a JavaScript `confirm()`, which contains a message to the user and
     /// expects a binary response for the webpage.
     /// - Parameters:
     ///   - id: An opaque identifier for the dialog.
     ///   - message: A message to display to the user.
     ///   - completion: A block to be invoked with the user's decision. The webpage will be paused
     ///   until this block is invoked, and failure to invoke the block, or multiple invocations will
     ///   result in a runtime exception.
     public static func javaScriptConfirm(
         id: ID = ID(), _ message: String, completion: @escaping (Bool) -> Void
     ) -> Self {
         Dialog(id: id, .javaScriptConfirm(message, completion))
     }

     /// Constructs a dialog for a JavaScript `prompt()`, which contains a message to the user and
     /// expects the response of either a string or `nil`.
     /// - Parameters:
     ///   - id: An opaque identifier for the dialog.
     ///   - message: A message to display to the user.
     ///   - defaultText: A default response for the user, provided by the webpage.
     ///   - completion: A block to be invoked with the user's decision. For this reply, `nil` and
     ///   an empty string (`""`) are treated differently. `nil` means that the user selected a
     ///   _cancel_ operation, while any non-`nil` response implies an _ok_ operation. The webpage
     ///   will be paused until this block is invoked, and failure to invoke the block, or multiple
     ///   invocations will result in a runtime exception.
     public static func javaScriptPrompt(
         id: ID = ID(), _ message: String, defaultText: String = "",
         completion: @escaping (String?) -> Void
     ) -> Self {
         Dialog(id: id, .javaScriptPrompt(message, defaultText: defaultText, completion))
     }

     public func hash(into hasher: inout Hasher) {
         hasher.combine(id)
     }

     public static func == (lhs: Dialog, rhs: Dialog) -> Bool {
         lhs.id == rhs.id
     }

     /// An opaque identifier for a `Dialog`.
     public struct ID : Hashable {
         private var rawValue = UUID()

         /// Constructs a new, unique identifier.
         public init() {
         }
     }

     /// Describes a specific type of dialog, along with any specific values for that type.
     public enum Configuration {
         /// A dialog triggered by the JavaScript `window.alert()` API.
         /// - Paramaters:
         ///   - 0: A message from the webpage for the user.
         ///   - 1: A block to be invoked when the dialog has been dismissed. The webpage will be
         ///   paused until this block is invoked, and failure to invoke the block, or multiple
         ///   invocations will result in a runtime exception.
         case javaScriptAlert(String, () -> Void)

         /// A dialog triggered by the JavaScript `window.confirm()` API.
         ///   - 0: A message from the webpage for the user.
         ///   - 1: A block to be invoked with a binary decision from the user. The webpage will be
         ///   paused until this block is invoked, and failure to invoke the block, or multiple
         ///   invocations will result in a runtime exception.
         case javaScriptConfirm(String, (Bool) -> Void)

         /// A dialog triggered by the JavaScript `window.prompt()` API.
         /// - Paramaters:
         ///   - 0: A message from the webpage for the user.
         ///   - defaultText: A webpage provided default response for the user.
         ///   - 1: A block to be invoked with the user's decision. For this reply, `nil` and an
         ///   empty string (`""`) are treated differently. `nil` means that the user selected a
         ///   _cancel_ operation, while any non-`nil` response implies an _ok_ operation. The
         ///   webpage will be paused until this block is invoked, and failure to invoke the block,
         ///   or multiple invocations will result in a runtime exception.
         case javaScriptPrompt(String, defaultText: String, (String?) -> Void)
     }
 }

 /// A view providing the WebKit-default UI for generic webpage dialogs.
 struct DialogContainer<Contents, Actions> : View where Contents : View, Actions : View {
     var contents: Contents
     var actions: Actions

     init(@ViewBuilder contents: () -> Contents, @ViewBuilder actions: () -> Actions) {
         self.contents = contents()
         self.actions = actions()
     }

     var body: some View {
         ZStack {
             Color(white: 0, opacity: 0.15)

             VStack(spacing: 0) {
                 VStack(alignment: .leading) {
                     contents
                 }
                 .frame(maxWidth: .infinity, alignment: .leading)
                 .textFieldStyle(RoundedBorderTextFieldStyle())
                 .padding()

                 Divider()

                 HStack(spacing: 12) {
                     Spacer()
                     actions
                         .buttonStyle(_LinkButtonStyle())
                 }
                 .padding(.horizontal)
                 .padding(.vertical, 12)
             }
             .frame(maxWidth: 300)
             .background(RoundedRectangle(cornerRadius: 10)
                             .foregroundColor(Color.platformBackground)
                             .shadow(radius: 12))
             .overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.platformSeparator))
         }
     }
 }

 #if os(macOS)
 private typealias _LinkButtonStyle = LinkButtonStyle
 #else
 private struct _LinkButtonStyle : ButtonStyle {
     func makeBody(configuration: Configuration) -> some View {
         configuration.label
             .foregroundColor(.blue)
     }
 }
 #endif
	/*
	* Copyright (C) 2020 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	import SwiftUI

	/// A dialog requested for display by some aspect of web content.
	public struct Dialog : Identifiable, Hashable {
	/// An opaque identifier for this dialog.
	public var id = ID()

	/// A configuration describing the purpose and contents of this dialog for display.
	public var configuration: Configuration

	/// Constructs a dialog from its component parts.
	public init(id: ID = ID(), _ configuration: Configuration) {
	self.id = id
	self.configuration = configuration
	}

	/// Constructs a dialog for a JavaScript `alert()`, which contains only a message to the user.
	/// - Parameters:
	/// - id: An opaque identifier for the dialog.
	/// - message: A message to display to the user.
	/// - completion: A block to be invoked when the dialog has been dismissed. The webpage will
	/// be paused until this block is invoked, and failure to invoke the block, or multiple
	/// invocations will result in a runtime exception.
	public static func javaScriptAlert(
	id: ID = ID(), _ message: String, completion: @escaping () -> Void
	) -> Self {
	Dialog(id: id, .javaScriptAlert(message, completion))
	}

	/// Constructs a dialog for a JavaScript `confirm()`, which contains a message to the user and
	/// expects a binary response for the webpage.
	/// - Parameters:
	/// - id: An opaque identifier for the dialog.
	/// - message: A message to display to the user.
	/// - completion: A block to be invoked with the user's decision. The webpage will be paused
	/// until this block is invoked, and failure to invoke the block, or multiple invocations will
	/// result in a runtime exception.
	public static func javaScriptConfirm(
	id: ID = ID(), _ message: String, completion: @escaping (Bool) -> Void
	) -> Self {
	Dialog(id: id, .javaScriptConfirm(message, completion))
	}

	/// Constructs a dialog for a JavaScript `prompt()`, which contains a message to the user and
	/// expects the response of either a string or `nil`.
	/// - Parameters:
	/// - id: An opaque identifier for the dialog.
	/// - message: A message to display to the user.
	/// - defaultText: A default response for the user, provided by the webpage.
	/// - completion: A block to be invoked with the user's decision. For this reply, `nil` and
	/// an empty string (`""`) are treated differently. `nil` means that the user selected a
	/// _cancel_ operation, while any non-`nil` response implies an _ok_ operation. The webpage
	/// will be paused until this block is invoked, and failure to invoke the block, or multiple
	/// invocations will result in a runtime exception.
	public static func javaScriptPrompt(
	id: ID = ID(), _ message: String, defaultText: String = "",
	completion: @escaping (String?) -> Void
	) -> Self {
	Dialog(id: id, .javaScriptPrompt(message, defaultText: defaultText, completion))
	}

	public func hash(into hasher: inout Hasher) {
	hasher.combine(id)
	}

	public static func == (lhs: Dialog, rhs: Dialog) -> Bool {
	lhs.id == rhs.id
	}

	/// An opaque identifier for a `Dialog`.
	public struct ID : Hashable {
	private var rawValue = UUID()

	/// Constructs a new, unique identifier.
	public init() {
	}
	}

	/// Describes a specific type of dialog, along with any specific values for that type.
	public enum Configuration {
	/// A dialog triggered by the JavaScript `window.alert()` API.
	/// - Paramaters:
	/// - 0: A message from the webpage for the user.
	/// - 1: A block to be invoked when the dialog has been dismissed. The webpage will be
	/// paused until this block is invoked, and failure to invoke the block, or multiple
	/// invocations will result in a runtime exception.
	case javaScriptAlert(String, () -> Void)

	/// A dialog triggered by the JavaScript `window.confirm()` API.
	/// - 0: A message from the webpage for the user.
	/// - 1: A block to be invoked with a binary decision from the user. The webpage will be
	/// paused until this block is invoked, and failure to invoke the block, or multiple
	/// invocations will result in a runtime exception.
	case javaScriptConfirm(String, (Bool) -> Void)

	/// A dialog triggered by the JavaScript `window.prompt()` API.
	/// - Paramaters:
	/// - 0: A message from the webpage for the user.
	/// - defaultText: A webpage provided default response for the user.
	/// - 1: A block to be invoked with the user's decision. For this reply, `nil` and an
	/// empty string (`""`) are treated differently. `nil` means that the user selected a
	/// _cancel_ operation, while any non-`nil` response implies an _ok_ operation. The
	/// webpage will be paused until this block is invoked, and failure to invoke the block,
	/// or multiple invocations will result in a runtime exception.
	case javaScriptPrompt(String, defaultText: String, (String?) -> Void)
	}
	}

	/// A view providing the WebKit-default UI for generic webpage dialogs.
	struct DialogContainer<Contents, Actions> : View where Contents : View, Actions : View {
	var contents: Contents
	var actions: Actions

	init(@ViewBuilder contents: () -> Contents, @ViewBuilder actions: () -> Actions) {
	self.contents = contents()
	self.actions = actions()
	}

	var body: some View {
	ZStack {
	Color(white: 0, opacity: 0.15)

	VStack(spacing: 0) {
	VStack(alignment: .leading) {
	contents
	}
	.frame(maxWidth: .infinity, alignment: .leading)
	.textFieldStyle(RoundedBorderTextFieldStyle())
	.padding()

	Divider()

	HStack(spacing: 12) {
	Spacer()
	actions
	.buttonStyle(_LinkButtonStyle())
	}
	.padding(.horizontal)
	.padding(.vertical, 12)
	}
	.frame(maxWidth: 300)
	.background(RoundedRectangle(cornerRadius: 10)
	.foregroundColor(Color.platformBackground)
	.shadow(radius: 12))
	.overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.platformSeparator))
	}
	}
	}

	#if os(macOS)
	private typealias _LinkButtonStyle = LinkButtonStyle
	#else
	private struct _LinkButtonStyle : ButtonStyle {
	func makeBody(configuration: Configuration) -> some View {
	configuration.label
	.foregroundColor(.blue)
	}
	}
	#endif