WIP: use viewport to allow sizes of scroll to extend further than renderable screen

src/terminal.zig

@@ -2,7 +2,8 @@ const std = @import("std");
 pub const code_point = @import("code_point");
 
 const Key = @import("key.zig");
-const Size = @import("size.zig");
+const Position = @import("size.zig").Position;
+const Size = @import("size.zig").Size;
 const Cell = @import("cell.zig");
 
 const log = std.log.scoped(.terminal);
@@ -78,7 +79,7 @@ pub fn writer() Writer {
     return .{ .context = .{} };
 }
 
-pub fn setCursorPosition(pos: Size.Position) !void {
+pub fn setCursorPosition(pos: Position) !void {
     var buf: [64]u8 = undefined;
     const value = try std.fmt.bufPrint(&buf, "\x1b[{d};{d}H", .{ pos.row, pos.col });
     _ = try std.posix.write(std.posix.STDIN_FILENO, value);