Add changes from review for width calculation

src/main.zig

@@ -102,7 +102,8 @@ pub fn main() !void {
         defer allocator.free(config_path);
 
         config = config_ini.readFileToStructWithMap(config_path, mapped_config_fields) catch _config: {
-            try info_line.addError("Unable to parse config file");
+            // literal error message, due to language file not yet available
+            try info_line.addError("unable to parse config file");
             break :_config Config{};
         };
 
@@ -120,7 +121,8 @@ pub fn main() !void {
         }
     } else {
         config = config_ini.readFileToStructWithMap(build_options.data_directory ++ "/config.ini", mapped_config_fields) catch _config: {
-            try info_line.addError("Unable to parse config file");
+            // literal error message, due to language file not yet available
+            try info_line.addError("unable to parse config file");
             break :_config Config{};
         };
 
@@ -138,20 +140,20 @@ pub fn main() !void {
     info_line.error_bg = config.error_bg;
     info_line.error_fg = config.error_fg;
 
-    if (!build_options.enable_x11_support) info_line.setText(lang.no_x11_support);
+    if (!build_options.enable_x11_support) try info_line.setText(lang.no_x11_support);
 
     interop.setNumlock(config.numlock) catch {};
 
     if (config.initial_info_text) |text| {
-        info_line.setText(text);
+        try info_line.setText(text);
     } else get_host_name: {
         // Initialize information line with host name
         var name_buf: [std.posix.HOST_NAME_MAX]u8 = undefined;
         const hostname = std.posix.gethostname(&name_buf) catch {
-            info_line.setText(lang.err_hostname);
+            try info_line.setText(lang.err_hostname);
             break :get_host_name;
         };
-        info_line.setText(hostname);
+        try info_line.setText(hostname);
     }
 
     // Initialize termbox
@@ -603,7 +605,7 @@ pub fn main() !void {
                     const password_text = try allocator.dupeZ(u8, password.text.items);
                     defer allocator.free(password_text);
 
-                    info_line.setText(lang.authenticating);
+                    try info_line.setText(lang.authenticating);
                     InfoLine.clearRendered(allocator, buffer) catch {};
                     try info_line.draw(buffer);
                     _ = termbox.tb_present();
@@ -630,7 +632,7 @@ pub fn main() !void {
                     if (config.clear_password or err != error.PamAuthError) password.clear();
                 } else {
                     password.clear();
-                    info_line.setText(lang.logout);
+                    try info_line.setText(lang.logout);
                 }
 
                 try std.posix.tcsetattr(std.posix.STDIN_FILENO, .FLUSH, tb_termios);

src/tui/components/InfoLine.zig

@@ -3,20 +3,23 @@ const utils = @import("../utils.zig");
 const TerminalBuffer = @import("../TerminalBuffer.zig");
 
 const ArrayList = std.ArrayList;
+const ErrorMessage = struct { width: u8, text: []const u8 };
 
 const InfoLine = @This();
 
-error_list: ArrayList([]const u8),
+error_list: ArrayList(ErrorMessage),
 error_bg: u16,
 error_fg: u16,
 text: []const u8,
+width: u8,
 
 pub fn init(allocator: std.mem.Allocator) InfoLine {
     return .{
-        .error_list = ArrayList([]const u8).init(allocator),
+        .error_list = ArrayList(ErrorMessage).init(allocator),
         .error_bg = 0,
         .error_fg = 258,
         .text = "",
+        .width = 0,
     };
 }
 
@@ -24,27 +27,35 @@ pub fn deinit(self: InfoLine) void {
     self.error_list.deinit();
 }
 
-pub fn setText(self: *InfoLine, text: []const u8) void {
+pub fn setText(self: *InfoLine, text: []const u8) !void {
+    self.width = if (text.len > 0) try utils.strWidth(text) else 0;
     self.text = text;
 }
 
 pub fn addError(self: *InfoLine, error_message: []const u8) !void {
-    try self.error_list.append(error_message);
+    if (error_message.len > 0) {
+        const entry = .{
+            .width = try utils.strWidth(error_message),
+            .text = error_message,
+        };
+        try self.error_list.append(entry);
+    }
 }
 
 pub fn draw(self: InfoLine, buffer: TerminalBuffer) !void {
     var text: []const u8 = self.text;
     var bg: u16 = buffer.bg;
     var fg: u16 = buffer.fg;
+    var width: u8 = self.width;
 
     if (self.error_list.items.len > 0) {
-        text = self.error_list.getLast();
+        const entry = self.error_list.getLast();
+        text = entry.text; 
         bg = self.error_bg;
         fg = self.error_fg;
+        width = entry.width;
     }
 
-    const width: u8 = if (text.len > 0) try utils.strWidth(text) else 0;
-
     if (width > 0 and buffer.box_width > width) {
         const label_y = buffer.box_y + buffer.margin_box_v;
         const x = buffer.box_x + ((buffer.box_width - width) / 2);