"copy-on-select" configuation to disable

src/Surface.zig

@@ -144,6 +144,7 @@ const DerivedConfig = struct {
     clipboard_read: bool,
     clipboard_write: bool,
     clipboard_trim_trailing_spaces: bool,
+    copy_on_select: configpkg.CopyOnSelect,
     confirm_close_surface: bool,
     mouse_interval: u64,
     macos_non_native_fullscreen: bool,
@@ -159,6 +160,7 @@ const DerivedConfig = struct {
             .clipboard_read = config.@"clipboard-read",
             .clipboard_write = config.@"clipboard-write",
             .clipboard_trim_trailing_spaces = config.@"clipboard-trim-trailing-spaces",
+            .copy_on_select = config.@"copy-on-select",
             .confirm_close_surface = config.@"confirm-close-surface",
             .mouse_interval = config.@"click-repeat-interval" * 1_000_000, // 500ms
             .macos_non_native_fullscreen = config.@"macos-non-native-fullscreen",
@@ -833,6 +835,13 @@ fn setSelection(self: *Surface, sel_: ?terminal.Selection) void {
     const prev_ = self.io.terminal.screen.selection;
     self.io.terminal.screen.selection = sel_;
 
+    // Determine the clipboard we want to copy selection to, if it is enabled.
+    const clipboard: apprt.Clipboard = switch (self.config.copy_on_select) {
+        .false => return,
+        .true => .selection,
+        .clipboard => .standard,
+    };
+
     // Set our selection clipboard. If the selection is cleared we do not
     // clear the clipboard. If the selection is set, we only set the clipboard
     // again if it changed, since setting the clipboard can be an expensive
@@ -850,7 +859,7 @@ fn setSelection(self: *Surface, sel_: ?terminal.Selection) void {
     };
     defer self.alloc.free(buf);
 
-    self.rt_surface.setClipboardString(buf, .selection) catch |err| {
+    self.rt_surface.setClipboardString(buf, clipboard) catch |err| {
         log.err("error setting clipboard string err={}", .{err});
         return;
     };
@@ -1697,7 +1706,14 @@ pub fn mouseButtonCallback(
 
     // Middle-click pastes from our selection clipboard
     if (button == .middle and action == .press) {
-        try self.clipboardPaste(.selection, false);
+        if (self.config.copy_on_select != .false) {
+            const clipboard: apprt.Clipboard = switch (self.config.copy_on_select) {
+                .true => .selection,
+                .clipboard => .standard,
+                .false => unreachable,
+            };
+            try self.clipboardPaste(clipboard, false);
+        }
     }
 }
 

src/config.zig

@@ -186,6 +186,17 @@ pub const Config = struct {
     /// This does not affect data sent to the clipboard via "clipboard-write".
     @"clipboard-trim-trailing-spaces": bool = true,
 
+    /// Whether to automatically copy selected text to the clipboard. "true"
+    /// will only copy on systems that support a selection clipboard.
+    ///
+    /// The value "clipboard" will copy to the system clipboard, making this
+    /// work on macOS. Note that middle-click will also paste from the system
+    /// clipboard in this case.
+    ///
+    /// Note that if this is disabled, middle-click paste will also be
+    /// disabled.
+    @"copy-on-select": CopyOnSelect = .true,
+
     /// The time in milliseconds between clicks to consider a click a repeat
     /// (double, triple, etc.) or an entirely new single click. A value of
     /// zero will use a platform-specific default. The default on macOS
@@ -1375,6 +1386,20 @@ pub const Keybinds = struct {
     }
 };
 
+/// Options for copy on select behavior.
+pub const CopyOnSelect = enum {
+    /// Disables copy on select entirely.
+    false,
+
+    /// Copy on select is enabled, but goes to the selection clipboard.
+    /// This is not supported on platforms such as macOS. This is the default.
+    true,
+
+    /// Copy on select is enabled and goes to the system clipboard.
+    clipboard,
+};
+
+/// Shell integration values
 pub const ShellIntegration = enum {
     none,
     detect,