From f165131da83bf5ba7b11e587d9b4b364a4859da4 Mon Sep 17 00:00:00 2001
From: Karl Seguin <k@openmymind.io>
Date: Fri, 16 May 2025 20:33:28 +0800
Subject: [PATCH] add defaultView getter to HTMLDocument

---
 src/browser/env.zig           |  5 ++++-
 src/browser/html/document.zig |  9 +++++++++
 src/browser/page.zig          |  1 +
 src/runtime/js.zig            | 11 +++++++++--
 src/testing.zig               | 13 +++++++------
 5 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/src/browser/env.zig b/src/browser/env.zig
index f378619a..3269255f 100644
--- a/src/browser/env.zig
+++ b/src/browser/env.zig
@@ -44,11 +44,14 @@ pub const JsThis = Env.JsThis;
 pub const JsObject = Env.JsObject;
 pub const Callback = Env.Callback;
 pub const Env = js.Env(*SessionState, WebApis);
-pub const Global = @import("html/window.zig").Window;
+
+const Window = @import("html/window.zig").Window;
+pub const Global = Window;
 
 pub const SessionState = struct {
     loop: *Loop,
     url: *const URL,
+    window: *Window,
     renderer: *Renderer,
     arena: std.mem.Allocator,
     http_client: *HttpClient,
diff --git a/src/browser/html/document.zig b/src/browser/html/document.zig
index 89370f50..82617af4 100644
--- a/src/browser/html/document.zig
+++ b/src/browser/html/document.zig
@@ -21,6 +21,7 @@ const std = @import("std");
 const parser = @import("../netsurf.zig");
 const SessionState = @import("../env.zig").SessionState;
 
+const Window = @import("window.zig").Window;
 const Document = @import("../dom/document.zig").Document;
 const NodeList = @import("../dom/nodelist.zig").NodeList;
 const Location = @import("location.zig").Location;
@@ -171,6 +172,10 @@ pub const HTMLDocument = struct {
         return "off";
     }
 
+    pub fn get_defaultView(_: *parser.DocumentHTML, state: *const SessionState) *Window {
+        return state.window;
+    }
+
     // noop legacy functions
     // https://html.spec.whatwg.org/#Document-partial
     pub fn _clear(_: *parser.DocumentHTML) void {}
@@ -267,4 +272,8 @@ test "Browser.HTML.Document" {
         .{ "document.all(5)", "[object HTMLParagraphElement]" },
         .{ "document.all('content')", "[object HTMLDivElement]" },
     }, .{});
+
+    try runner.testCases(&.{
+        .{ "document.defaultView.document == document", "true" },
+    }, .{});
 }
diff --git a/src/browser/page.zig b/src/browser/page.zig
index ffed1cd2..77f34f31 100644
--- a/src/browser/page.zig
+++ b/src/browser/page.zig
@@ -97,6 +97,7 @@ pub const Page = struct {
                 .arena = arena,
                 .document = null,
                 .url = &self.url,
+                .window = &self.window,
                 .renderer = &self.renderer,
                 .loop = browser.app.loop,
                 .cookie_jar = &session.cookie_jar,
diff --git a/src/runtime/js.zig b/src/runtime/js.zig
index d3d68873..3921f0aa 100644
--- a/src/runtime/js.zig
+++ b/src/runtime/js.zig
@@ -1952,9 +1952,16 @@ fn Caller(comptime E: type, comptime State: type) type {
             const params = @typeInfo(F).@"fn".params;
 
             const param = params[index].type.?;
-            if (param != State) {
-                @compileError(std.fmt.comptimePrint("The {d} parameter to {s} must be a {s}. Got: {s}", .{ index, named_function.full_name, @typeName(State), @typeName(param) }));
+            if (param == State) {
+                return;
+            }
+
+            if (@typeInfo(State) == .pointer) {
+                if (param == *const @typeInfo(State).pointer.child) {
+                    return;
+                }
             }
+            @compileError(std.fmt.comptimePrint("The {d} parameter to {s} must be a {s}. Got: {s}", .{ index, named_function.full_name, @typeName(State), @typeName(param) }));
         }
 
         fn handleError(self: *Self, comptime Struct: type, comptime named_function: NamedFunction, err: anyerror, info: anytype) void {
diff --git a/src/testing.zig b/src/testing.zig
index f11c0ab6..26926433 100644
--- a/src/testing.zig
+++ b/src/testing.zig
@@ -412,22 +412,23 @@ pub const JsRunner = struct {
         var html = std.io.fixedBufferStream(opts.html);
         const document = try parser.documentHTMLParse(html.reader(), "UTF-8");
 
+        self.window = try Window.create(null, null);
+        try self.window.replaceDocument(document);
+        try self.window.replaceLocation(.{
+            .url = try self.url.toWebApi(arena),
+        });
+
         self.state = .{
             .arena = arena,
             .loop = &self.loop,
             .document = document,
             .url = &self.url,
+            .window = &self.window,
             .renderer = &self.renderer,
             .cookie_jar = &self.cookie_jar,
             .http_client = &self.http_client,
         };
 
-        self.window = try Window.create(null, null);
-        try self.window.replaceDocument(document);
-        try self.window.replaceLocation(.{
-            .url = try self.url.toWebApi(arena),
-        });
-
         self.storage_shelf = storage.Shelf.init(arena);
         self.window.setStorageShelf(&self.storage_shelf);