From fada732b33b937f66097eb7c5c355d1453315cfb Mon Sep 17 00:00:00 2001
From: Muki Kiboigo <muki@muki.gg>
Date: Mon, 19 May 2025 07:33:24 -0700
Subject: [PATCH] add NodeFilter

---
 src/browser/dom/dom.zig         |  2 ++
 src/browser/dom/node_filter.zig | 52 +++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 src/browser/dom/node_filter.zig

diff --git a/src/browser/dom/dom.zig b/src/browser/dom/dom.zig
index b6029392..0b998063 100644
--- a/src/browser/dom/dom.zig
+++ b/src/browser/dom/dom.zig
@@ -27,6 +27,7 @@ const MutationObserver = @import("mutation_observer.zig");
 const IntersectionObserver = @import("intersection_observer.zig");
 const DOMParser = @import("dom_parser.zig").DOMParser;
 const TreeWalker = @import("tree_walker.zig").TreeWalker;
+const NodeFilter = @import("node_filter.zig").NodeFilter;
 
 pub const Interfaces = .{
     DOMException,
@@ -41,4 +42,5 @@ pub const Interfaces = .{
     IntersectionObserver.Interfaces,
     DOMParser,
     TreeWalker,
+    NodeFilter,
 };
diff --git a/src/browser/dom/node_filter.zig b/src/browser/dom/node_filter.zig
new file mode 100644
index 00000000..c7cc896d
--- /dev/null
+++ b/src/browser/dom/node_filter.zig
@@ -0,0 +1,52 @@
+// Copyright (C) 2023-2024  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");
+
+pub const NodeFilter = struct {
+    pub const _FILTER_ACCEPT: u16 = 1;
+    pub const _FILTER_REJECT: u16 = 2;
+    pub const _FILTER_SKIP: u16 = 3;
+    pub const _SHOW_ALL: u32 = std.math.maxInt(u32);
+    pub const _SHOW_ELEMENT: u32 = 0b1;
+    pub const _SHOW_ATTRIBUTE: u32 = 0b10;
+    pub const _SHOW_TEXT: u32 = 0b100;
+    pub const _SHOW_CDATA_SECTION: u32 = 0b1000;
+    pub const _SHOW_ENTITY_REFERENCE: u32 = 0b10000;
+    pub const _SHOW_ENTITY: u32 = 0b100000;
+    pub const _SHOW_PROCESSING_INSTRUCTION: u32 = 0b1000000;
+    pub const _SHOW_COMMENT: u32 = 0b10000000;
+    pub const _SHOW_DOCUMENT: u32 = 0b100000000;
+    pub const _SHOW_DOCUMENT_TYPE: u32 = 0b1000000000;
+    pub const _SHOW_DOCUMENT_FRAGMENT: u32 = 0b10000000000;
+    pub const _SHOW_NOTATION: u32 = 0b100000000000;
+};
+
+const testing = @import("../../testing.zig");
+test "Browser.DOM.NodeFilter" {
+    var runner = try testing.jsRunner(testing.tracking_allocator, .{});
+    defer runner.deinit();
+
+    try runner.testCases(&.{
+        .{ "NodeFilter.FILTER_ACCEPT", "1" },
+        .{ "NodeFilter.FILTER_REJECT", "2" },
+        .{ "NodeFilter.FILTER_SKIP", "3" },
+        .{ "NodeFilter.SHOW_ALL", "4294967295" },
+        .{ "NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT", "129" },
+    }, .{});
+}