mod(memory): do not create items on the stack instead using the provided allocator

src/widget/Text.zig

@@ -12,10 +12,11 @@ pub fn Widget(comptime Event: type, comptime Renderer: type) type {
         @compileError("Provided user event `Event` for `Layout(comptime Event: type)` is not of type `union(enum)`.");
     }
     return struct {
-        alignment: Alignment = undefined,
-        contents: []const Cell = undefined,
-        size: terminal.Size = undefined,
-        require_render: bool = false,
+        allocator: std.mem.Allocator,
+        alignment: Alignment,
+        contents: []const Cell,
+        size: terminal.Size,
+        require_render: bool,
 
         const Alignment = enum {
             default,
@@ -26,15 +27,17 @@ pub fn Widget(comptime Event: type, comptime Renderer: type) type {
             right,
         };
 
-        pub fn init(alignment: Alignment, contents: []const Cell) @This() {
-            return .{
-                .alignment = alignment,
-                .contents = contents,
-            };
+        pub fn init(allocator: std.mem.Allocator, alignment: Alignment, contents: []const Cell) *@This() {
+            var this = allocator.create(@This()) catch @panic("Text.zig: Failed to create");
+            this.allocator = allocator;
+            this.require_render = true;
+            this.alignment = alignment;
+            this.contents = contents;
+            return this;
         }
 
         pub fn deinit(this: *@This()) void {
-            this.* = undefined;
+            this.allocator.destroy(this);
         }
 
         pub fn handle(this: *@This(), event: Event) ?Event {