feat: update TextColor and BackgroundColor (#124)

* Update TextView color and font

* Update TextColor and BackgroundColor

* improve dark mode checking

Co-authored-by: Karthikeya Udupa <karthikeyaudupa@gmail.com>

Author: cntrump

SwiftyJSONAccelerator/UI/SJTextView.swift

@@ -8,8 +8,37 @@
 
 import Cocoa
 
+extension NSColor {
+ 
+    @inline(__always) public convenience init(RGB hex: UInt32, alpha: CGFloat = 1) {
+        let red = CGFloat((hex & 0xff0000) >> 16) / 255.0
+        let green = CGFloat((hex & 0xff00) >> 8) / 255.0
+        let blue = CGFloat(hex & 0xff) / 255.0
+        
+        self.init(deviceRed: red, green: green, blue: blue, alpha: alpha)
+    }
+}
+
+extension NSView {
+    
+    @inline(__always) public var isDarkMode: Bool {
+        if #available(OSX 10.14, *) {
+            return effectiveAppearance.name == .darkAqua
+        }
+        
+        return false
+    }
+}
+
 /// A textview customization to handle formatting and handling removal of quotes.
 class SJTextView: NSTextView {
+    
+    let lightTextColor = NSColor(RGB: 0x24292d)
+    let lightBackgroundColor = NSColor(RGB: 0xf6f8fa)
+    
+    let darkTextColor = NSColor(RGB: 0xd1d5da)
+    let darkBackgroundColor = NSColor(RGB: 0x24292d)
+    
     override init(frame frameRect: NSRect, textContainer container: NSTextContainer?) {
         super.init(frame: frameRect, textContainer: container)
         disableAutoReplacement()
@@ -25,8 +54,19 @@ class SJTextView: NSTextView {
     }
 
     internal func updateFormat() {
-        textStorage?.font = NSFont(name: "Menlo", size: 12)
-        textColor = NSColor.textColor
+        textStorage?.font = NSFont(name: "Monaco", size: 12)
+        
+        let color = NSColor(RGB: 0x07c160)
+        insertionPointColor = color
+        selectedTextAttributes = [.backgroundColor: color.withAlphaComponent(0.2)]
+        
+        if isDarkMode {
+            textColor = darkTextColor
+            backgroundColor = darkBackgroundColor
+        } else {
+            textColor = lightTextColor
+            backgroundColor = lightBackgroundColor
+        }
     }
 
     override func paste(_ sender: Any?) {
@@ -43,4 +83,10 @@ class SJTextView: NSTextView {
         isAutomaticDashSubstitutionEnabled = false
         isAutomaticTextReplacementEnabled = false
     }
+    
+    override func layout() {
+        super.layout()
+        
+        updateFormat()
+    }
 }