dom: reimplement nodelist in pure zig

src/dom/element.zig

@@ -9,6 +9,7 @@ const checkCases = jsruntime.test_utils.checkCases;
 const collection = @import("html_collection.zig");
 
 const Node = @import("node.zig").Node;
+const NodeList = @import("nodelist.zig").NodeList;
 const HTMLElem = @import("../html/elements.zig");
 pub const Union = @import("../html/elements.zig").Union;
 

src/dom/node.zig

@@ -14,6 +14,7 @@ const EventTarget = @import("event_target.zig").EventTarget;
 const Attr = @import("attribute.zig").Attr;
 const CData = @import("character_data.zig");
 const Element = @import("element.zig").Element;
+const NodeList = @import("nodelist.zig").NodeList;
 const Document = @import("document.zig").Document;
 const DocumentType = @import("document_type.zig").DocumentType;
 const DocumentFragment = @import("document_fragment.zig").DocumentFragment;
@@ -193,8 +194,15 @@ pub const Node = struct {
         return try parser.nodeHasChildNodes(self);
     }
 
-    pub fn get_childNodes(self: *parser.Node) !*parser.NodeList {
-        return try parser.nodeGetChildNodes(self);
+    pub fn get_childNodes(self: *parser.Node, alloc: std.mem.Allocator) !*NodeList {
+        const list = try NodeList.init(alloc);
+        errdefer list.deinit(alloc);
+
+        var n = try parser.nodeFirstChild(self) orelse return list;
+        while (true) {
+            try list.append(n);
+            n = try parser.nodeNextSibling(n) orelse return list;
+        }
     }
 
     pub fn _insertBefore(self: *parser.Node, new_node: *parser.Node, ref_node: *parser.Node) !*parser.Node {
@@ -246,6 +254,8 @@ pub const Node = struct {
         const res = try parser.nodeReplaceChild(self, new_child, old_child);
         return try Node.toInterface(res);
     }
+
+    pub fn deinit(_: *parser.Node, _: std.mem.Allocator) void {}
 };
 
 // Tests

src/dom/nodelist.zig

@@ -3,30 +3,73 @@ const std = @import("std");
 const parser = @import("../netsurf.zig");
 
 const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
 
 const NodeUnion = @import("node.zig").Union;
 const Node = @import("node.zig").Node;
 
 const DOMException = @import("exceptions.zig").DOMException;
 
+// Nodelist is implemented in pure Zig b/c libdom's NodeList doesn't allow to
+// append nodes.
 // WEB IDL https://dom.spec.whatwg.org/#nodelist
 pub const NodeList = struct {
-    pub const Self = parser.NodeList;
     pub const mem_guarantied = true;
-
     pub const Exception = DOMException;
 
-    pub fn get_length(self: *parser.NodeList) !u32 {
-        return try parser.nodeListLength(self);
+    const NodesArrayList = std.ArrayList(*parser.Node);
+
+    nodes: NodesArrayList,
+
+    pub fn init(alloc: std.mem.Allocator) !*NodeList {
+        const list = try alloc.create(NodeList);
+        list.* = NodeList{
+            .nodes = NodesArrayList.init(alloc),
+        };
+
+        return list;
     }
 
-    pub fn _item(self: *parser.NodeList, index: u32) !?NodeUnion {
-        const n = try parser.nodeListItem(self, index);
-        if (n == null) return null;
-        return try Node.toInterface(n.?);
+    pub fn deinit(self: *NodeList, alloc: std.mem.Allocator) void {
+        // TODO unref all nodes
+        self.nodes.deinit();
+        alloc.destroy(self);
+    }
+
+    pub fn append(self: *NodeList, node: *parser.Node) !void {
+        try self.nodes.append(node);
+    }
+
+    pub fn get_length(self: *NodeList) u32 {
+        return @intCast(self.nodes.items.len);
+    }
+
+    pub fn _item(self: *NodeList, index: u32) !?NodeUnion {
+        if (index >= self.nodes.items.len) {
+            return null;
+        }
+
+        const n = self.nodes.items[index];
+        return try Node.toInterface(n);
     }
 
     // TODO _symbol_iterator
 
     // TODO implement postAttach
 };
+
+// Tests
+// -----
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+    comptime _: []jsruntime.API,
+) !void {
+    var childnodes = [_]Case{
+        .{ .src = "let list = document.getElementById('content').childNodes", .ex = "undefined" },
+        .{ .src = "list.length", .ex = "9" },
+    };
+    try checkCases(js_env, &childnodes);
+}

src/netsurf.zig

@@ -360,26 +360,6 @@ pub const NodeListType = enum(c_uint) {
     query = 5,
 };
 
-// create reference to external libdom private function manually instead of
-// using cimport.
-// zig translate-c is unable to generate this declaration, idk why.
-pub extern fn _dom_nodelist_create(
-    document: ?*Document,
-    nltype: c_uint,
-    owner: ?*Node,
-    tagname: [*c]String,
-    ns: [*c]String,
-    localname: [*c]String,
-    list: [*c]?*NodeList,
-) DOMException;
-
-pub fn nodeListCreate(doc: ?*Document, nltype: NodeListType, root: *Node) !*NodeList {
-    var res: ?*NodeList = undefined;
-    const err = _dom_nodelist_create(doc, @intFromEnum(nltype), root, null, null, null, &res);
-    try DOMErr(err);
-    return res.?;
-}
-
 pub fn nodeListLength(nodeList: *NodeList) !u32 {
     var ln: u32 = undefined;
     const err = c.dom_nodelist_get_length(nodeList, &ln);
@@ -671,13 +651,6 @@ pub fn nodeHasChildNodes(node: *Node) !bool {
     return res;
 }
 
-pub fn nodeGetChildNodes(node: *Node) !*NodeList {
-    var res: ?*NodeList = undefined;
-    const err = nodeVtable(node).dom_node_get_child_nodes.?(node, &res);
-    try DOMErr(err);
-    return res.?;
-}
-
 pub fn nodeInsertBefore(node: *Node, new_node: *Node, ref_node: *Node) !*Node {
     var res: ?*Node = undefined;
     const err = nodeVtable(node).dom_node_insert_before.?(node, new_node, ref_node, &res);

src/run_tests.zig

@@ -17,6 +17,7 @@ const DOMExceptionTestExecFn = @import("dom/exceptions.zig").testExecFn;
 const DOMImplementationExecFn = @import("dom/implementation.zig").testExecFn;
 const NamedNodeMapExecFn = @import("dom/namednodemap.zig").testExecFn;
 const DOMTokenListExecFn = @import("dom/token_list.zig").testExecFn;
+const NodeListTestExecFn = @import("dom/nodelist.zig").testExecFn;
 
 var doc: *parser.DocumentHTML = undefined;
 
@@ -65,6 +66,7 @@ fn testsAllExecFn(
         DOMImplementationExecFn,
         NamedNodeMapExecFn,
         DOMTokenListExecFn,
+        NodeListTestExecFn,
     };
 
     inline for (testFns) |testFn| {