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const std = @import("std");
const Allocator = std.mem.Allocator;
const Arena = std.heap.ArenaAllocator;
const HTML = @import("html/Element.zig");
const Element = @import("Element.zig");
const Node = Element.Node;
const Self = @This();
content: std.DoublyLinkedList = .{},
arena: Arena,
node: Node = .{
.ptr = undefined,
.vtable = .{ .element = fromNode },
},
pub fn init(parent: Allocator) !*Self {
var s = Self{ .arena = .init(parent) };
var alloc = s.arena.allocator();
const v = try alloc.create(Self);
v.* = s;
v.node.ptr = v;
return v;
}
pub fn deinit(self: *Self) void {
self.arena.deinit();
}
pub fn allocator(self: *Self) Allocator {
return self.arena.allocator();
}
pub fn append(self: *Self, raw: anytype) void {
const el: Element = blk: {
const T = @TypeOf(raw);
if (T == Element) break :blk raw;
if (std.meta.hasMethod(T, "element")) break :blk raw.element();
@compileError("cannot convert " ++ @typeName(T) ++ " into " ++ @typeName(Element));
};
self.content.append(&el.node().node);
}
pub fn element(self: *Self) Element {
return .{ .vtable = .{ .html = html, .node = getNode }, .ptr = self };
}
pub fn renderHTML(self: *Self, alloc: Allocator) HTML.Error![]const u8 {
return try self.element().renderHTML(alloc);
}
fn getNode(context: *anyopaque) *Node {
const self: *Self = @ptrCast(@alignCast(context));
return &self.node;
}
fn fromNode(context: *anyopaque) Element {
const self: *Self = @ptrCast(@alignCast(context));
return self.element();
}
fn html(context: *anyopaque, alloc: Allocator) HTML.Error!HTML {
const self: *Self = @ptrCast(@alignCast(context));
const el = try HTML.Root.init(alloc);
var v = self.content.first;
while (v) |it| : (v = it.next) try el.append(Node.from(it).element());
return el.element();
}
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