Show no-selection or multiple-selection text in the detail view when appropriate.

Evergreen/Base.lproj/MainWindow.storyboard

@@ -2,7 +2,9 @@
 <document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14092" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
     <dependencies>
         <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14092"/>
+        <capability name="box content view" minToolsVersion="7.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+        <capability name="system font weights other than Regular or Bold" minToolsVersion="7.0"/>
     </dependencies>
     <scenes>
         <!--Window Controller-->
@@ -699,11 +701,61 @@
                     </customView>
                     <connections>
                         <outlet property="containerView" destination="cJ9-6s-66u" id="gXc-Pz-9sQ"/>
+                        <outlet property="noSelectionView" destination="aEc-1k-VmJ" id="KLS-ln-T1K"/>
                     </connections>
                 </viewController>
                 <customObject id="vzM-Vn-mEn" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
+                <customView id="aEc-1k-VmJ" customClass="NoSelectionView" customModule="Evergreen" customModuleProvider="target">
+                    <rect key="frame" x="0.0" y="0.0" width="613" height="96"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                    <subviews>
+                        <box boxType="custom" borderType="none" borderWidth="0.0" titlePosition="noTitle" translatesAutoresizingMaskIntoConstraints="NO" id="Zb8-hH-gIZ">
+                            <rect key="frame" x="0.0" y="0.0" width="613" height="96"/>
+                            <view key="contentView" id="Gmh-qL-lA5">
+                                <rect key="frame" x="0.0" y="0.0" width="613" height="96"/>
+                                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                                <subviews>
+                                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="ECt-Wi-zkb">
+                                        <rect key="frame" x="266" y="40" width="109" height="22"/>
+                                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="No selection" usesSingleLineMode="YES" id="oNn-so-m7W">
+                                            <font key="font" metaFont="systemSemibold" size="18"/>
+                                            <color key="textColor" name="tertiaryLabelColor" catalog="System" colorSpace="catalog"/>
+                                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                                        </textFieldCell>
+                                    </textField>
+                                    <textField hidden="YES" horizontalHuggingPriority="251" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="1AW-Ay-XS8">
+                                        <rect key="frame" x="408" y="39" width="154" height="22"/>
+                                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Multiple selection" usesSingleLineMode="YES" id="vhD-gM-NUy">
+                                            <font key="font" metaFont="systemSemibold" size="18"/>
+                                            <color key="textColor" name="tertiaryLabelColor" catalog="System" colorSpace="catalog"/>
+                                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                                        </textFieldCell>
+                                    </textField>
+                                </subviews>
+                                <constraints>
+                                    <constraint firstItem="1AW-Ay-XS8" firstAttribute="centerY" secondItem="Gmh-qL-lA5" secondAttribute="centerY" constant="-64" id="9uN-K3-d35"/>
+                                    <constraint firstItem="ECt-Wi-zkb" firstAttribute="centerX" secondItem="Gmh-qL-lA5" secondAttribute="centerX" id="QDc-Y3-Nn4"/>
+                                    <constraint firstItem="1AW-Ay-XS8" firstAttribute="centerX" secondItem="Gmh-qL-lA5" secondAttribute="centerX" id="QV5-qP-Ys6"/>
+                                    <constraint firstItem="ECt-Wi-zkb" firstAttribute="centerY" secondItem="Gmh-qL-lA5" secondAttribute="centerY" constant="-64" id="yQr-wJ-pBL"/>
+                                </constraints>
+                            </view>
+                            <color key="borderColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                            <color key="fillColor" white="0.95999999999999996" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                        </box>
+                    </subviews>
+                    <constraints>
+                        <constraint firstItem="Zb8-hH-gIZ" firstAttribute="leading" secondItem="aEc-1k-VmJ" secondAttribute="leading" id="5Ay-6o-LZ1"/>
+                        <constraint firstItem="Zb8-hH-gIZ" firstAttribute="top" secondItem="aEc-1k-VmJ" secondAttribute="top" id="Wb7-Zp-hj0"/>
+                        <constraint firstAttribute="trailing" secondItem="Zb8-hH-gIZ" secondAttribute="trailing" id="cYM-up-kUN"/>
+                        <constraint firstAttribute="bottom" secondItem="Zb8-hH-gIZ" secondAttribute="bottom" id="gCy-5R-aK2"/>
+                    </constraints>
+                    <connections>
+                        <outlet property="multipleSelectionLabel" destination="1AW-Ay-XS8" id="gK2-Ya-Dz7"/>
+                        <outlet property="noSelectionLabel" destination="ECt-Wi-zkb" id="Dvq-DU-MxC"/>
+                    </connections>
+                </customView>
             </objects>
-            <point key="canvasLocation" x="62" y="774"/>
+            <point key="canvasLocation" x="68" y="946"/>
         </scene>
     </scenes>
     <resources>

Evergreen/MainWindow/Detail/DetailViewController.swift

@@ -12,14 +12,30 @@ import RSCore
 import Data
 import RSWeb
 
-final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDelegate {
+final class DetailViewController: NSViewController, WKUIDelegate {
 
 	@IBOutlet var containerView: DetailContainerView!
+	@IBOutlet var noSelectionView: NoSelectionView!
 
 	var webview: DetailWebView!
-	var noSelectionView: NoSelectionView!
 
-	var article: Article? {
+	var articles: [Article]? {
+		didSet {
+			if let articles = articles, articles.count == 1 {
+				article = articles.first!
+				return
+			}
+			article = nil
+			if let _ = articles {
+				noSelectionView.showMultipleSelection()
+			}
+			else {
+				noSelectionView.showNoSelection()
+			}
+		}
+	}
+	
+	private var article: Article? {
 		didSet {
 			reloadHTML()
 			showOrHideWebView()
@@ -62,8 +78,6 @@ final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDe
 			webview.customUserAgent = userAgent
 		}
 
-		noSelectionView = NoSelectionView(frame: self.view.bounds)
-
 		containerView.viewController = self
 
 		showOrHideWebView()
@@ -91,7 +105,7 @@ final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDe
 		webview.scrollPageDown(sender)
 	}
 
-	// MARK: Notifications
+	// MARK: - Notifications
 
 	@objc func timelineSelectionDidChange(_ notification: Notification) {
 
@@ -102,8 +116,8 @@ final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDe
 			return
 		}
 		
-		let timelineArticle = userInfo[UserInfoKey.article] as? Article
+		let timelineArticles = userInfo[UserInfoKey.articles] as? ArticleArray
-		article = timelineArticle
+		articles = timelineArticles
 	}
 
 	func viewWillStartLiveResize() {
@@ -115,39 +129,11 @@ final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDe
 		
 		webview.evaluateJavaScript("document.body.style.overflow = 'visible';", completionHandler: nil)
 	}
+}
 
-	// MARK: Private
+// MARK: - WKNavigationDelegate
 
-	private func reloadHTML() {
+extension DetailViewController: WKNavigationDelegate {
-
-		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) {
-
-		if containerView.contentView == view {
-			return
-		}
-		containerView.contentView = view
-	}
-
-	// MARK: WKNavigationDelegate
 
 	public func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
 
@@ -165,6 +151,8 @@ final class DetailViewController: NSViewController, WKNavigationDelegate, WKUIDe
 	}
 }
 
+// MARK: - WKScriptMessageHandler
+
 extension DetailViewController: WKScriptMessageHandler {
 
 	func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
@@ -200,8 +188,39 @@ extension DetailViewController: WKScriptMessageHandler {
 	}
 }
 
+// MARK: - Private
+
 private extension DetailViewController {
 
+	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)
+		}
+	}
+
+	func showOrHideWebView() {
+
+		if let _ = article {
+			switchToView(webview)
+		}
+		else {
+			switchToView(noSelectionView)
+		}
+	}
+
+	func switchToView(_ view: NSView) {
+
+		if containerView.contentView == view {
+			return
+		}
+		containerView.contentView = view
+	}
+
 	func fetchScrollInfo(_ callback: @escaping (ScrollInfo?) -> Void) {
 
 		let javascriptString = "var x = {contentHeight: document.body.scrollHeight, offsetY: document.body.scrollTop}; x"
@@ -222,6 +241,8 @@ private extension DetailViewController {
 	}
 }
 
+// MARK: -
+
 final class DetailContainerView: NSView {
 
 	@IBOutlet var detailStatusBarView: DetailStatusBarView!
@@ -270,28 +291,28 @@ final class DetailContainerView: NSView {
 	}
 }
 
+// MARK: -
+
 final class NoSelectionView: NSView {
 
-	private var didConfigureLayer = false
+	@IBOutlet var noSelectionLabel: NSTextField!
+	@IBOutlet var multipleSelectionLabel: NSTextField!
 
-	override var wantsUpdateLayer: Bool {
+	func showMultipleSelection() {
-		return true
+
+		noSelectionLabel.isHidden = true
+		multipleSelectionLabel.isHidden = false
 	}
 
-	override func updateLayer() {
+	func showNoSelection() {
 
-		guard !didConfigureLayer else {
+		noSelectionLabel.isHidden = false
-			return
+		multipleSelectionLabel.isHidden = true
-		}
-		if let layer = layer {
-//			let color = appDelegate.currentTheme.color(forKey: "MainWindow.Detail.noSelectionView.backgroundColor")
-			let color = NSColor(calibratedWhite: 0.96, alpha: 1.0)
-			layer.backgroundColor = color.cgColor
-			didConfigureLayer = true
-		}
 	}
 }
 
+// MARK: -
+
 private struct ScrollInfo {
 
 	let contentHeight: CGFloat

Evergreen/MainWindow/Timeline/ArticleArray.swift

@@ -110,6 +110,12 @@ extension Array where Element == Article {
 
 		return anyArticlePassesTest { !$0.status.starred }
 	}
+
+	func unreadArticles() -> [Article]? {
+
+		let articles = self.filter{ !$0.status.read }
+		return articles.isEmpty ? nil : articles
+	}
 }
 
 private extension Array where Element == Article {

Evergreen/MainWindow/Timeline/TimelineViewController.swift

@@ -516,30 +516,28 @@ extension TimelineViewController: NSTableViewDelegate {
 
 	func tableViewSelectionDidChange(_ notification: Notification) {
 
-		tableView.redrawGrid()
+		//		tableView.redrawGrid()
 
-		let selectedRow = tableView.selectedRow
+		if selectedArticles.isEmpty {
-		if selectedRow < 0 || selectedRow == NSNotFound || tableView.numberOfSelectedRows != 1 {
 			postTimelineSelectionDidChangeNotification(nil)
 			return
 		}
 
-		if let selectedArticle = articles.articleAtRow(selectedRow) {
+		if selectedArticles.count == 1 {
-			if (!selectedArticle.status.read) {
+			let article = selectedArticles.first!
-				markArticles(Set([selectedArticle]), statusKey: .read, flag: true)
+			if !article.status.read {
+				markArticles(Set([article]), statusKey: .read, flag: true)
 			}
-			postTimelineSelectionDidChangeNotification(selectedArticle)
-		}
-		else {
-			postTimelineSelectionDidChangeNotification(nil)
 		}
+
+		postTimelineSelectionDidChangeNotification(selectedArticles)
 	}
 
-	private func postTimelineSelectionDidChangeNotification(_ selectedArticle: Article?) {
+	private func postTimelineSelectionDidChangeNotification(_ selectedArticles: ArticleArray?) {
 
 		var userInfo = UserInfoDictionary()
-		if let article = selectedArticle {
+		if let selectedArticles = selectedArticles {
-			userInfo[UserInfoKey.article] = article
+			userInfo[UserInfoKey.articles] = selectedArticles
 		}
 		userInfo[UserInfoKey.view] = tableView