1 files changed, 54 insertions, 0 deletions
diff --git a/src/eval/html/Root.zig b/src/eval/html/Root.zig
new file mode 100644
index 0000000..80c556a
--- /dev/null
+++ b/src/eval/html/Root.zig
@@ -0,0 +1,54 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const Arena = std.heap.ArenaAllocator;
+const List = std.ArrayList;
+const Element = @import("Element.zig");
+const Error = Element.Error;
+
+content: List(Element),
+arena: Arena,
+
+const Self = @This();
+
+pub fn init(parent: Allocator) Error!*Self {
+    var s = Self{
+        .content = undefined,
+        .arena = .init(parent),
+    };
+    var alloc = s.arena.allocator();
+    s.content = try .initCapacity(alloc, 2);
+    const v = try alloc.create(Self);
+    v.* = s;
+    return v;
+}
+
+pub fn deinit(self: *Self) void {
+    self.arena.deinit();
+}
+
+pub fn element(self: *Self) Element {
+    return .{ .vtable = .{ .render = Self.render, }, .ptr = self };
+}
+
+pub fn allocator(self: *Self) Allocator {
+    return self.arena.allocator();
+}
+
+pub fn append(self: *Self, el: Element) Error!void {
+    try self.content.append(self.allocator(), el);
+}
+
+fn render(context: *anyopaque, alloc: Allocator) Error![]const u8 {
+    const self: *Self = @ptrCast(@alignCast(context));
+    if (self.content.items.len == 0) return "";
+    var acc = try List(u8).initCapacity(alloc, self.content.items.len);
+    errdefer acc.deinit(alloc);
+
+    var arena = Arena.init(alloc);
+    defer arena.deinit();
+    for (self.content.items) |it| {
+        const res = try it.render(arena.allocator());
+        try acc.appendSlice(alloc, res);
+    }
+    return acc.toOwnedSlice(alloc);
+}