dom: implement Attr interface

src/dom/attribute.zig

@@ -1,5 +1,9 @@
 const std = @import("std");
 
+const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
+
 const parser = @import("../netsurf.zig");
 
 const Node = @import("node.zig").Node;
@@ -10,4 +14,73 @@ pub const Attr = struct {
     pub const Self = parser.Attribute;
     pub const prototype = *Node;
     pub const mem_guarantied = true;
+
+    pub fn get_namespaceURI(self: *parser.Attribute) !?[]const u8 {
+        return try parser.nodeGetNamespace(parser.attributeToNode(self));
+    }
+
+    pub fn get_prefix(self: *parser.Attribute) !?[]const u8 {
+        return try parser.nodeGetPrefix(parser.attributeToNode(self));
+    }
+
+    pub fn get_localName(self: *parser.Attribute) ![]const u8 {
+        return try parser.nodeLocalName(parser.attributeToNode(self));
+    }
+
+    pub fn get_name(self: *parser.Attribute) ![]const u8 {
+        return try parser.attributeGetName(self);
+    }
+
+    pub fn get_value(self: *parser.Attribute) !?[]const u8 {
+        return try parser.attributeGetValue(self);
+    }
+
+    pub fn set_value(self: *parser.Attribute, v: []const u8) !?[]const u8 {
+        try parser.attributeSetValue(self, v);
+        return v;
+    }
+
+    pub fn get_ownerElement(self: *parser.Attribute) !?*parser.Element {
+        return try parser.attributeGetOwnerElement(self);
+    }
+
+    pub fn get_specified(_: *parser.Attribute) bool {
+        return true;
+    }
 };
+
+// Tests
+// -----
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+    comptime _: []jsruntime.API,
+) !void {
+    var getters = [_]Case{
+        .{ .src = "let a = document.createAttributeNS('foo', 'bar')", .ex = "undefined" },
+        .{ .src = "a.namespaceURI", .ex = "foo" },
+        .{ .src = "a.prefix", .ex = "null" },
+        .{ .src = "a.localName", .ex = "bar" },
+        .{ .src = "a.name", .ex = "bar" },
+        .{ .src = "a.value", .ex = "" },
+        // TODO: libdom has a bug here: the created attr has no parent, it
+        // causes a panic w/ libdom when setting the value.
+        //.{ .src = "a.value = 'nok'", .ex = "nok" },
+        .{ .src = "a.ownerElement", .ex = "null" },
+    };
+    try checkCases(js_env, &getters);
+
+    var attr = [_]Case{
+        .{ .src = "let b = document.getElementById('link').getAttributeNode('class')", .ex = "undefined" },
+        .{ .src = "b.name", .ex = "class" },
+        .{ .src = "b.value", .ex = "ok" },
+        .{ .src = "b.value = 'nok'", .ex = "nok" },
+        .{ .src = "b.value", .ex = "nok" },
+        .{ .src = "b.value = null", .ex = "null" },
+        .{ .src = "b.value", .ex = "null" },
+        .{ .src = "b.value = 'ok'", .ex = "ok" },
+        .{ .src = "b.ownerElement.id", .ex = "link" },
+    };
+    try checkCases(js_env, &attr);
+}