NetNewsWire/Evergreen/MainWindow/Detail/DetailViewController.swift

209 lines
4.9 KiB
Swift

//
// DetailViewController.swift
// Evergreen
//
// Created by Brent Simmons on 7/26/15.
// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import WebKit
import RSCore
import Data
import RSWeb
final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDelegate {
var webview: WKWebView!
var noSelectionView: NoSelectionView!
var article: Article? {
didSet {
reloadHTML()
showOrHideWebView()
}
}
private struct MessageName {
static let mouseDidEnter = "mouseDidEnter"
static let mouseDidExit = "mouseDidExit"
}
override func viewDidLoad() {
NotificationCenter.default.addObserver(self, selector: #selector(timelineSelectionDidChange(_:)), name: .TimelineSelectionDidChange, object: nil)
let preferences = WKPreferences()
preferences.minimumFontSize = 12.0
preferences.javaScriptCanOpenWindowsAutomatically = false
preferences.javaEnabled = false
preferences.javaScriptEnabled = true
preferences.plugInsEnabled = false
let configuration = WKWebViewConfiguration()
configuration.preferences = preferences
let userContentController = WKUserContentController()
userContentController.add(self, name: MessageName.mouseDidEnter)
userContentController.add(self, name: MessageName.mouseDidExit)
configuration.userContentController = userContentController
webview = WKWebView(frame: self.view.bounds, configuration: configuration)
webview.uiDelegate = self
webview.navigationDelegate = self
webview.translatesAutoresizingMaskIntoConstraints = false
if let userAgent = UserAgent.fromInfoPlist() {
webview.customUserAgent = userAgent
}
noSelectionView = NoSelectionView(frame: self.view.bounds)
let boxView = self.view as! DetailBox
boxView.viewController = self
showOrHideWebView()
}
// MARK: Notifications
@objc func timelineSelectionDidChange(_ note: Notification) {
let timelineView = note.appInfo?.view
if timelineView?.window === self.view.window {
article = note.appInfo?.article
}
}
func viewWillStartLiveResize() {
webview.evaluateJavaScript("document.body.style.overflow = 'hidden';", completionHandler: nil)
}
func viewDidEndLiveResize() {
webview.evaluateJavaScript("document.body.style.overflow = 'visible';", completionHandler: nil)
}
// MARK: Private
private func reloadHTML() {
if let article = article {
let articleRenderer = ArticleRenderer(article: article, style: ArticleStylesManager.shared.currentStyle)
webview.loadHTMLString(articleRenderer.html, baseURL: articleRenderer.baseURL)
}
else {
webview.loadHTMLString("", baseURL: nil)
}
}
private func showOrHideWebView() {
if let _ = article {
switchToView(webview)
}
else {
switchToView(noSelectionView)
}
}
private func switchToView(_ view: NSView) {
let boxView = self.view as! DetailBox
if boxView.contentView == view {
return
}
boxView.contentView = view
boxView.rs_addFullSizeConstraints(forSubview: view)
}
// MARK: WKNavigationDelegate
public func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .linkActivated {
if let url = navigationAction.request.url {
Browser.open(url.absoluteString)
}
decisionHandler(.cancel)
return
}
decisionHandler(.allow)
}
}
extension DetailViewController: WKScriptMessageHandler {
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
if message.name == MessageName.mouseDidEnter, let link = message.body as? String {
mouseDidEnter(link)
}
else if message.name == MessageName.mouseDidExit, let link = message.body as? String{
mouseDidExit(link)
}
}
private func mouseDidEnter(_ link: String) {
if link.isEmpty {
return
}
let appInfo = AppInfo()
appInfo.view = self.view
appInfo.url = link
NotificationCenter.default.post(name: .MouseDidEnterLink, object: self, userInfo: appInfo.userInfo)
}
private func mouseDidExit(_ link: String) {
let appInfo = AppInfo()
appInfo.view = self.view
appInfo.url = link
NotificationCenter.default.post(name: .MouseDidExitLink, object: self, userInfo: appInfo.userInfo)
}
}
final class DetailBox: NSBox {
weak var viewController: DetailViewController?
override func viewWillStartLiveResize() {
viewController?.viewWillStartLiveResize()
}
override func viewDidEndLiveResize() {
viewController?.viewDidEndLiveResize()
}
}
final class NoSelectionView: NSView {
private var didConfigureLayer = false
override var wantsUpdateLayer: Bool {
return true
}
override func updateLayer() {
guard !didConfigureLayer else {
return
}
if let layer = layer {
let color = appDelegate.currentTheme.color(forKey: "MainWindow.Detail.noSelectionView.backgroundColor")
layer.backgroundColor = color.cgColor
didConfigureLayer = true
}
}
}