Support a text wrapping preference in the textview (#105)

Author: Lukas Pistrol

Sources/CodeEditTextView/CodeEditTextView.swift

@@ -20,6 +20,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
     ///   - font: The default font
     ///   - tabWidth: The tab width
     ///   - lineHeight: The line height multiplier (e.g. `1.2`)
+    ///   - wrapLines: Whether lines wrap to the width of the editor
     ///   - editorOverscroll: The percentage for overscroll, between 0-1 (default: `0.0`)
     public init(
         _ text: Binding<String>,
@@ -28,6 +29,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
         font: Binding<NSFont>,
         tabWidth: Binding<Int>,
         lineHeight: Binding<Double>,
+        wrapLines: Binding<Bool>,
         editorOverscroll: Binding<Double> = .constant(0.0),
         cursorPosition: Published<(Int, Int)>.Publisher? = nil
     ) {
@@ -37,6 +39,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
         self._font = font
         self._tabWidth = tabWidth
         self._lineHeight = lineHeight
+        self._wrapLines = wrapLines
         self._editorOverscroll = editorOverscroll
         self.cursorPosition = cursorPosition
     }
@@ -47,6 +50,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
     @Binding private var font: NSFont
     @Binding private var tabWidth: Int
     @Binding private var lineHeight: Double
+    @Binding private var wrapLines: Bool
     @Binding private var editorOverscroll: Double
     private var cursorPosition: Published<(Int, Int)>.Publisher?
 
@@ -59,6 +63,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
             font: font,
             theme: theme,
             tabWidth: tabWidth,
+            wrapLines: wrapLines,
             cursorPosition: cursorPosition,
             editorOverscroll: editorOverscroll
         )
@@ -71,6 +76,7 @@ public struct CodeEditTextView: NSViewControllerRepresentable {
         controller.language = language
         controller.theme = theme
         controller.tabWidth = tabWidth
+        controller.wrapLines = wrapLines
         controller.lineHeightMultiple = lineHeight
         controller.editorOverscroll = editorOverscroll
         controller.reloadUI()

Sources/CodeEditTextView/STTextViewController.swift

@@ -45,6 +45,9 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
     /// The editorOverscroll to use for the textView over scroll
     public var editorOverscroll: Double
 
+    /// Whether lines wrap to the width of the editor
+    public var wrapLines: Bool
+
     // MARK: - Highlighting
 
     internal var highlighter: Highlighter?
@@ -58,6 +61,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
         font: NSFont,
         theme: EditorTheme,
         tabWidth: Int,
+        wrapLines: Bool,
         cursorPosition: Published<(Int, Int)>.Publisher? = nil,
         editorOverscroll: Double
     ) {
@@ -66,6 +70,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
         self.font = font
         self.theme = theme
         self.tabWidth = tabWidth
+        self.wrapLines = wrapLines
         self.cursorPosition = cursorPosition
         self.editorOverscroll = editorOverscroll
         super.init(nibName: nil, bundle: nil)
@@ -78,23 +83,19 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
     // MARK: VC Lifecycle
 
     public override func loadView() {
-        let scrollView = STTextView.scrollableTextView()
-        textView = scrollView.documentView as? STTextView
-
-        // By default this is always null but is required for a couple operations
-        // during highlighting so we make a new one manually.
-        textView.textContainer.replaceLayoutManager(NSLayoutManager())
+        textView = STTextView()
 
+        let scrollView = NSScrollView()
         scrollView.translatesAutoresizingMaskIntoConstraints = false
         scrollView.hasVerticalScroller = true
+        scrollView.documentView = textView
 
         rulerView = STLineNumberRulerView(textView: textView, scrollView: scrollView)
         rulerView.backgroundColor = theme.background
         rulerView.textColor = .systemGray
         rulerView.drawSeparator = false
         rulerView.baselineOffset = baselineOffset
         rulerView.font = NSFont.monospacedDigitSystemFont(ofSize: 9.5, weight: .regular)
-
         scrollView.verticalRulerView = rulerView
         scrollView.rulersVisible = true
 
@@ -107,7 +108,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
         textView.selectionBackgroundColor = theme.selection
         textView.selectedLineHighlightColor = theme.lineHighlight
         textView.string = self.text.wrappedValue
-        textView.widthTracksTextView = true
+        textView.widthTracksTextView = self.wrapLines
         textView.highlightSelectedLine = true
         textView.allowsUndo = true
         textView.setupMenus()

Tests/CodeEditTextViewTests/STTextViewControllerTests.swift

@@ -33,6 +33,7 @@ final class STTextViewControllerTests: XCTestCase {
             font: .monospacedSystemFont(ofSize: 11, weight: .medium),
             theme: theme,
             tabWidth: 4,
+            wrapLines: true,
             editorOverscroll: 0.5
         )
     }