core: support opening scrollback file in default text editor

src/Surface.zig

@@ -3324,7 +3324,7 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             }, .unlocked);
         },
 
-        .write_scrollback_file => write_scrollback_file: {
+        .write_scrollback_file => |scrollback_action| write_scrollback_file: {
             // Create a temporary directory to store our scrollback.
             var tmp_dir = try internal_os.TempDir.init();
             errdefer tmp_dir.deinit();
@@ -3365,10 +3365,18 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             var path_buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
             const path = try tmp_dir.dir.realpath("scrollback", &path_buf);
 
-            self.io.queueMessage(try termio.Message.writeReq(
-                self.alloc,
-                path,
-            ), .unlocked);
+            switch (scrollback_action) {
+                .paste => {
+                    self.io.queueMessage(try termio.Message.writeReq(
+                        self.alloc,
+                        path,
+                    ), .unlocked);
+                },
+                .open => {
+                    log.debug("opening scrollback file: {s}", .{path});
+                    try internal_os.open(self.alloc, path);
+                },
+            }
         },
 
         .new_window => try self.app.newWindow(self.rt_app, .{ .parent = self }),

src/config/Config.zig

@@ -1322,7 +1322,13 @@ pub fn default(alloc_gpa: Allocator) Allocator.Error!Config {
     try result.keybind.set.put(
         alloc,
         .{ .key = .{ .translated = .j }, .mods = inputpkg.ctrlOrSuper(.{ .shift = true }) },
-        .{ .write_scrollback_file = {} },
+        .{ .write_scrollback_file = .paste },
+    );
+
+    try result.keybind.set.put(
+        alloc,
+        .{ .key = .{ .translated = .j }, .mods = inputpkg.ctrlOrSuper(.{ .shift = true, .alt = true }) },
+        .{ .write_scrollback_file = .open },
     );
 
     // Expand Selection

src/input/Binding.zig

@@ -205,7 +205,7 @@ pub const Action = union(enum) {
 
     /// Write the entire scrollback into a temporary file and write the path to
     /// the file to the tty.
-    write_scrollback_file: void,
+    write_scrollback_file: WriteScrollbackAction,
 
     /// Open a new window.
     new_window: void,
@@ -292,6 +292,11 @@ pub const Action = union(enum) {
         end,
     };
 
+    pub const WriteScrollbackAction = enum {
+        paste,
+        open,
+    };
+
     pub const SplitDirection = enum {
         right,
         down,