111 lines
2.9 KiB
Swift
111 lines
2.9 KiB
Swift
//
|
|
// NavigationManager.swift
|
|
// Gemini
|
|
//
|
|
// Created by Shadowfacts on 7/14/20.
|
|
//
|
|
|
|
import Foundation
|
|
import Combine
|
|
|
|
public protocol NavigationManagerDelegate: class {
|
|
func loadNonGeminiURL(_ url: URL)
|
|
}
|
|
|
|
public class NavigationManager: NSObject, ObservableObject {
|
|
|
|
public weak var delegate: NavigationManagerDelegate?
|
|
|
|
@Published public var currentURL: URL
|
|
@Published public var backStack = [URL]()
|
|
@Published public var forwardStack = [URL]()
|
|
|
|
public let navigationOperation = PassthroughSubject<Operation, Never>()
|
|
|
|
public var displayURL: String {
|
|
var components = URLComponents(url: currentURL, resolvingAgainstBaseURL: false)!
|
|
if components.port == 1965 {
|
|
components.port = nil
|
|
}
|
|
return components.string!
|
|
}
|
|
|
|
public init(url: URL) {
|
|
self.currentURL = url
|
|
}
|
|
|
|
public func changeURL(_ url: URL) {
|
|
var components = URLComponents(url: url, resolvingAgainstBaseURL: false)!
|
|
if let scheme = url.scheme {
|
|
if scheme != "gemini" {
|
|
delegate?.loadNonGeminiURL(url)
|
|
return
|
|
}
|
|
} else {
|
|
components.scheme = "gemini"
|
|
}
|
|
|
|
// Foundation parses bare hosts (e.g. `example.com`) as having no host and a path of `example.com`
|
|
if components.host == nil {
|
|
components.host = components.path
|
|
components.path = "/"
|
|
}
|
|
|
|
// Some Gemini servers break on empty paths
|
|
if components.path.isEmpty {
|
|
components.path = "/"
|
|
}
|
|
|
|
let url = components.url!
|
|
|
|
backStack.append(currentURL)
|
|
currentURL = url
|
|
forwardStack = []
|
|
|
|
navigationOperation.send(.go)
|
|
}
|
|
|
|
@objc public func reload() {
|
|
let url = currentURL
|
|
currentURL = url
|
|
// todo: send navigation op
|
|
}
|
|
|
|
@objc public func goBack() {
|
|
back(count: 1)
|
|
}
|
|
|
|
public func back(count: Int) {
|
|
guard count <= backStack.count else { return }
|
|
var removed = backStack.suffix(count)
|
|
backStack.removeLast(count)
|
|
forwardStack.insert(currentURL, at: 0)
|
|
currentURL = removed.removeFirst()
|
|
forwardStack.insert(contentsOf: removed, at: 0)
|
|
|
|
navigationOperation.send(.backward(count: count))
|
|
}
|
|
|
|
@objc public func goForward() {
|
|
forward(count: 1)
|
|
}
|
|
|
|
public func forward(count: Int) {
|
|
guard count <= forwardStack.count else { return }
|
|
var removed = forwardStack.prefix(count)
|
|
forwardStack.removeFirst(count)
|
|
backStack.append(currentURL)
|
|
currentURL = removed.removeLast()
|
|
backStack.append(contentsOf: removed)
|
|
|
|
navigationOperation.send(.forward(count: count))
|
|
}
|
|
|
|
}
|
|
|
|
public extension NavigationManager {
|
|
enum Operation {
|
|
case go, forward(count: Int), backward(count: Int)
|
|
}
|
|
}
|