move window from nav to html

src/html/html.zig

@@ -2,10 +2,12 @@ const generate = @import("../generate.zig");
 
 const HTMLDocument = @import("document.zig").HTMLDocument;
 const HTMLElem = @import("elements.zig");
+const Window = @import("window.zig").Window;
 
 pub const Interfaces = generate.Tuple(.{
     HTMLDocument,
     HTMLElem.HTMLElement,
     HTMLElem.HTMLMediaElement,
     HTMLElem.Interfaces,
+    Window,
 });

src/html/window.zig

@@ -0,0 +1,44 @@
+const std = @import("std");
+
+const parser = @import("../netsurf.zig");
+
+// https://dom.spec.whatwg.org/#interface-window-extensions
+// https://html.spec.whatwg.org/multipage/nav-history-apis.html#window
+pub const Window = struct {
+    pub const mem_guarantied = true;
+
+    document: *parser.Document = undefined,
+    target: []const u8,
+
+    pub fn create(target: ?[]const u8) Window {
+        return Window{
+            .target = target orelse "",
+        };
+    }
+
+    pub fn replaceDocument(self: *Window, doc: *parser.Document) void {
+        self.document = doc;
+    }
+
+    pub fn get_window(self: *Window) *Window {
+        return self;
+    }
+
+    pub fn get_self(self: *Window) *Window {
+        return self;
+    }
+
+    pub fn get_parent(self: *Window) *Window {
+        return self;
+    }
+
+    pub fn get_document(self: *Window) *parser.Document {
+        return self.document;
+    }
+
+    pub fn get_name(self: *Window) []const u8 {
+        return self.target;
+    }
+
+    // TODO we need to re-implement EventTarget interface.
+};