Bugfix import color scheme.

Author: sbarex

QLMarkdown/Settings+ext.swift

@@ -153,6 +153,14 @@ extension Settings {
         NotificationCenter.default.post(name: .themeDidAdded, object: theme)
     }
 
+    @discardableResult
+    func removeTheme(path: String) throws -> Bool {
+        guard let theme = self.getAvailableThemes().first(where: { $0.path == path }) else {
+            return false
+        }
+        return try self.removeTheme(theme)
+    }
+    
     @discardableResult
     func removeTheme(_ theme: ThemePreview) throws -> Bool {
         guard !theme.isStandalone else { return false }

QLMarkdown/Themes/ThemesView.swift

@@ -380,7 +380,7 @@ class ThemesView: NSView {
         }
 
         let dst = themesFolder.appendingPathComponent(src.lastPathComponent)
-            
+        
         if FileManager.default.fileExists(atPath: dst.path) {
             let alert = NSAlert()
             alert.messageText = "A theme already exists with the same name. \nDo you want to overwrite?"
@@ -389,16 +389,25 @@ class ThemesView: NSView {
             alert.addButton(withTitle: "Yes").keyEquivalent = "\r"
             if alert.runModal() == .alertSecondButtonReturn {
                 do {
-                    try FileManager.default.removeItem(at: dst)
+                    try Settings.shared.removeTheme(path: dst.path)
                 } catch {
-                    
+                    let alert = NSAlert()
+                    alert.messageText = "Unable to remove previous theme!"
+                    alert.alertStyle = .warning
+                    alert.addButton(withTitle: "Cancel").keyEquivalent = "\u{1b}"
+                    alert.runModal()
+                    return
                 }
             } else {
                 return
             }
         }
         do {
             try FileManager.default.copyItem(at: src, to: dst)
+            let theme = ThemePreview(theme: t!.pointee)
+            theme.path = dst.path
+            Settings.shared.appendTheme(theme)
+            self.theme = theme
         } catch {
             let alert = NSAlert()
             alert.messageText = "Unable to import the theme!"