add(ViewPort): wrapper for vaxis.widgets.ScrollView

src/widget/Header.zig

@@ -8,14 +8,14 @@ const Event = widget.Event;
 
 allocator: std.mem.Allocator = undefined,
 unicode: *const vaxis.Unicode = undefined,
-title: ?[]const u8 = undefined,
+path: ?[]const u8 = undefined,
 view: ?vaxis.widgets.View = undefined,
 
 pub fn init(allocator: std.mem.Allocator, unicode: *const vaxis.Unicode) !@This() {
     return .{
         .allocator = allocator,
         .unicode = unicode,
-        .title = null,
+        .path = null,
         .view = null,
     };
 }
@@ -24,8 +24,8 @@ pub fn deinit(this: *@This()) void {
     if (this.view) |*view| {
         view.*.deinit();
     }
-    if (this.title) |*title| {
-        this.allocator.free(title.*);
+    if (this.path) |*path| {
+        this.allocator.free(path.*);
     }
     this.* = undefined;
 }
@@ -49,18 +49,11 @@ fn fillView(this: *@This()) void {
         this.view.?.writeCell(i, 0, cell);
     }
 
-    if (this.title) |title| {
+    if (this.path) |path| {
         // TODO: this could be a static string on the heap (due to the size of `513`)
-        var len: usize = 0;
-        for (title) |c| {
-            if (c == 0xaa or c == 0)
-                break;
-            len += 1;
-        }
-
-        for (title, 0..len, this.view.?.screen.width / 2 - len / 2..) |_, i, col| {
+        for (0..path.len, this.view.?.screen.width / 2 - path.len / 2..) |i, col| {
             const cell: vaxis.Cell = .{
-                .char = .{ .grapheme = title[i .. i + 1] },
+                .char = .{ .grapheme = path[i .. i + 1] },
                 .style = .{
                     .ul_style = .single,
                 },
@@ -69,7 +62,7 @@ fn fillView(this: *@This()) void {
         }
 
         // fill rest with default cells
-        for (this.view.?.screen.width / 2 + len..this.view.?.screen.width) |i| {
+        for (this.view.?.screen.width / 2 + path.len..this.view.?.screen.width) |i| {
             this.view.?.writeCell(i, 0, .{ .default = true });
         }
     }
@@ -91,14 +84,14 @@ pub fn update(this: *@This(), event: Event) void {
                 this.fillView();
             }
         },
-        .title => |title| {
+        .path => |path| {
             // TODO: try to remove the necessary amount of allocations
-            if (this.title) |*t| {
-                this.allocator.free(t.*);
+            if (this.path) |*p| {
+                this.allocator.free(p.*);
             }
-            const t = this.allocator.alloc(u8, title.len) catch @panic("OOM");
-            @memcpy(t, title);
-            this.title = t;
+            const p = this.allocator.alloc(u8, path.len) catch @panic("OOM");
+            @memcpy(p, path);
+            this.path = p;
             this.fillView();
         },
         else => {},