fix: free Document only if allocated otherwise treat as static

build.zig.zon

@@ -10,8 +10,8 @@
             .hash = "zterm-0.3.0-1xmmEH82HABfsn5imAK8lw93LevIaqNV10g6xfkNj_OT",
         },
         .zlog = .{
-            .url = "git+https://gitea.yves-biener.de/yves-biener/zlog#40ced30a574118cd76202c07dc4b2291c3321d3a",
+            .url = "git+https://gitea.yves-biener.de/yves-biener/zlog#b3c8a3ab1ccae1ba50efbdf26d68a18da8594d2c",
-            .hash = "zlog-0.16.0-6JSlR-BIAAAZ4fSbV54zbZZ9hnZSeOPnnFtiVjmIy3ID",
+            .hash = "zlog-0.16.0-6JSlRwNJAACVd89xnhXRHzCnCs7qab9Jcmx11VMS2ZpL",
         },
     },
     .paths = .{

src/main.zig

@@ -61,7 +61,6 @@ pub fn main() !void {
             var button: NavigationButton(.about) = .init(&app.model, &app.queue);
             try header.append(try .init(allocator, .{
                 .size = .{
-                    .dim = .{ .x = 5 + 2 },
                     .grow = .vertical,
                 },
             }, button.element()));
@@ -71,7 +70,6 @@ pub fn main() !void {
             var button: NavigationButton(.blog) = .init(&app.model, &app.queue);
             try header.append(try .init(allocator, .{
                 .size = .{
-                    .dim = .{ .x = 4 + 2 },
                     .grow = .vertical,
                 },
             }, button.element()));

src/model.zig

@@ -26,7 +26,7 @@ pub const Document = struct {
     title: ?[]const u8 = null,
     date: ?[]const u8 = null,
     content: []const u8 = undefined,
-    ptr: []const u8,
+    ptr: ?[]const u8,
 
     const Preemble = enum {
         title,
@@ -36,7 +36,7 @@ pub const Document = struct {
     pub const invalidPage: @This() = .{
         .title = "Page not found",
         .content = "Requested page does not exist",
-        .ptr = undefined,
+        .ptr = null,
     };
 
     pub fn init(content: []const u8) @This() {
@@ -67,8 +67,8 @@ pub const Document = struct {
     }
 
     pub fn deinit(this: *@This(), allocator: Allocator) void {
-        allocator.free(this.ptr);
+        if (this.ptr) |ptr| allocator.free(ptr);
-        this.* = .{ .ptr = undefined };
+        this.* = .{ .ptr = null };
     }
 };
 

src/navigation.zig

@@ -22,12 +22,17 @@ pub fn NavigationButton(App: type) fn (std.meta.FieldEnum(App.Event)) type {
                     return .{
                         .ptr = this,
                         .vtable = &.{
+                            .minSize = minSize,
                             .handle = handle,
                             .content = content,
                         },
                     };
                 }
 
+                fn minSize(_: *anyopaque, _: *const App.Model, _: zterm.Point) zterm.Point {
+                    return .{ .x = @tagName(page).len + 2 };
+                }
+
                 fn handle(ctx: *anyopaque, _: *App.Model, event: App.Event) !void {
                     const this: *@This() = @ptrCast(@alignCast(ctx));
                     switch (event) {