implement XMLSerializer

src/xmlserializer/xmlserializer.zig

@@ -0,0 +1,72 @@
+// Copyright (C) 2023-2025  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <francis@lightpanda.io>
+// Pierre Tachoire <pierre@lightpanda.io>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+const std = @import("std");
+
+const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
+const generate = @import("../generate.zig");
+
+const DOMError = @import("netsurf").DOMError;
+
+const parser = @import("netsurf");
+const dump = @import("../browser/dump.zig");
+
+pub const Interfaces = generate.Tuple(.{
+    XMLSerializer,
+});
+
+// https://w3c.github.io/DOM-Parsing/#dom-xmlserializer-constructor
+pub const XMLSerializer = struct {
+    pub const mem_guarantied = true;
+
+    pub fn constructor() !XMLSerializer {
+        return .{};
+    }
+
+    pub fn deinit(_: *XMLSerializer, _: std.mem.Allocator) void {}
+
+    pub fn _serializeToString(_: XMLSerializer, alloc: std.mem.Allocator, root: *parser.Node) ![]const u8 {
+        var buf = std.ArrayList(u8).init(alloc);
+        defer buf.deinit();
+
+        if (try parser.nodeType(root) == .document) {
+            try dump.writeHTML(@as(*parser.Document, @ptrCast(root)), buf.writer());
+        } else {
+            try dump.writeNode(root, buf.writer());
+        }
+        // TODO express the caller owned the slice.
+        // https://github.com/lightpanda-io/jsruntime-lib/issues/195
+        return try buf.toOwnedSlice();
+    }
+};
+
+// Tests
+// -----
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+) anyerror!void {
+    var serializer = [_]Case{
+        .{ .src = "const s = new XMLSerializer()", .ex = "undefined" },
+        .{ .src = "s.serializeToString(document.getElementById('para'))", .ex = "<p id=\"para\"> And</p>" },
+    };
+    try checkCases(js_env, &serializer);
+}