Add document.readyState

To support this, add the ability to embedded data into libdom nodes, so that
we can extend libdom without having to alter it.

Author: karlseguin

src/browser/env.zig

@@ -62,4 +62,16 @@ pub const SessionState = struct {
     // shorter-lived than the arena above, which
     // exists for the entire rendering of the page
     call_arena: std.mem.Allocator = undefined,
+
+    pub fn getNodeWrapper(self: *SessionState, comptime T: type, node: *parser.Node) !*T {
+        if (parser.nodeGetEmbedderData(node)) |wrap| {
+            return @alignCast(@ptrCast(wrap));
+        }
+
+        const wrap = try self.arena.create(T);
+        wrap.* = T{};
+
+        parser.nodeSetEmbedderData(node, wrap);
+        return wrap;
+    }
 };

src/browser/html/document.zig

@@ -36,6 +36,14 @@ pub const HTMLDocument = struct {
     pub const prototype = *Document;
     pub const subtype = .node;
 
+    ready_state: ReadyState = .loading,
+
+    const ReadyState = enum {
+        loading,
+        interactive,
+        complete,
+    };
+
     // JS funcs
     // --------
 
@@ -176,6 +184,11 @@ pub const HTMLDocument = struct {
         return state.window;
     }
 
+    pub fn get_readyState(node: *parser.DocumentHTML, state: *SessionState) ![]const u8 {
+        const self = try state.getNodeWrapper(HTMLDocument, @ptrCast(node));
+        return @tagName(self.ready_state);
+    }
+
     // noop legacy functions
     // https://html.spec.whatwg.org/#Document-partial
     pub fn _clear(_: *parser.DocumentHTML) void {}
@@ -212,6 +225,22 @@ pub const HTMLDocument = struct {
     pub fn set_bgColor(_: *parser.DocumentHTML, _: []const u8) []const u8 {
         return "";
     }
+
+    pub fn documentIsLoaded(html_doc: *parser.DocumentHTML, state: *SessionState) !void {
+        const self = try state.getNodeWrapper(HTMLDocument, @ptrCast(html_doc));
+        self.ready_state = .interactive;
+
+        const evt = try parser.eventCreate();
+        defer parser.eventDestroy(evt);
+
+        try parser.eventInit(evt, "DOMContentLoaded", .{ .bubbles = true, .cancelable = true });
+        _ = try parser.eventTargetDispatchEvent(parser.toEventTarget(parser.DocumentHTML, html_doc), evt);
+    }
+
+    pub fn documentIsComplete(html_doc: *parser.DocumentHTML, state: *SessionState) !void {
+        const self = try state.getNodeWrapper(HTMLDocument, @ptrCast(html_doc));
+        self.ready_state = .complete;
+    }
 };
 
 // Tests
@@ -276,4 +305,18 @@ test "Browser.HTML.Document" {
     try runner.testCases(&.{
         .{ "document.defaultView.document == document", "true" },
     }, .{});
+
+    try runner.testCases(&.{
+        .{ "document.readyState", "loading" },
+    }, .{});
+
+    try HTMLDocument.documentIsLoaded(runner.state.document.?, &runner.state);
+    try runner.testCases(&.{
+        .{ "document.readyState", "interactive" },
+    }, .{});
+
+    try HTMLDocument.documentIsComplete(runner.state.document.?, &runner.state);
+    try runner.testCases(&.{
+        .{ "document.readyState", "complete" },
+    }, .{});
 }

src/browser/netsurf.zig

@@ -1274,6 +1274,14 @@ pub fn nodeGetPrefix(node: *Node) !?[]const u8 {
     return strToData(s.?);
 }
 
+pub fn nodeGetEmbedderData(node: *Node) ?*anyopaque {
+    return c._dom_node_get_embedder_data(node);
+}
+
+pub fn nodeSetEmbedderData(node: *Node, data: *anyopaque) void {
+    c._dom_node_set_embedder_data(node, data);
+}
+
 // nodeToElement is an helper to convert a node to an element.
 pub inline fn nodeToElement(node: *Node) *Element {
     return @as(*Element, @ptrCast(node));

src/browser/page.zig

@@ -31,6 +31,7 @@ const Window = @import("html/window.zig").Window;
 const Walker = @import("dom/walker.zig").WalkerDepthFirst;
 const Env = @import("env.zig").Env;
 const Loop = @import("../runtime/loop.zig").Loop;
+const HTMLDocument = @import("html/document.zig").HTMLDocument;
 
 const URL = @import("../url.zig").URL;
 
@@ -351,16 +352,11 @@ pub const Page = struct {
             self.evalScript(&s) catch |err| log.warn("evaljs: {any}", .{err});
             try parser.documentHTMLSetCurrentScript(html_doc, null);
         }
-
         // dispatch DOMContentLoaded before the transition to "complete",
         // at the point where all subresources apart from async script elements
         // have loaded.
         // https://html.spec.whatwg.org/#reporting-document-loading-status
-        const evt = try parser.eventCreate();
-        defer parser.eventDestroy(evt);
-
-        try parser.eventInit(evt, "DOMContentLoaded", .{ .bubbles = true, .cancelable = true });
-        _ = try parser.eventTargetDispatchEvent(parser.toEventTarget(parser.DocumentHTML, html_doc), evt);
+        try HTMLDocument.documentIsLoaded(html_doc, &self.state);
 
         // eval async scripts.
         for (async_scripts.items) |s| {
@@ -369,9 +365,7 @@ pub const Page = struct {
             try parser.documentHTMLSetCurrentScript(html_doc, null);
         }
 
-        // TODO wait for async scripts
-
-        // TODO set document.readyState to complete
+        try HTMLDocument.documentIsComplete(html_doc, &self.state);
 
         // dispatch window.load event
         const loadevt = try parser.eventCreate();