Store window height in cookies so initial html is the right size

Ooui.AspNetCore/ElementResult.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Text;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Ooui.AspNetCore
@@ -21,9 +22,14 @@ namespace Ooui.AspNetCore
             var response = context.HttpContext.Response;
             response.StatusCode = 200;
             response.ContentType = "text/html; charset=utf-8";
+
+            if (element.WantsFullScreen) {
+                element.Style.Width = GetCookieDouble (context.HttpContext.Request.Cookies, "oouiWindowWidth", 32, 640, 10000);
+                element.Style.Height = GetCookieDouble (context.HttpContext.Request.Cookies, "oouiWindowHeight", 24, 480, 10000);
+            }
+
             var sessionId = WebSocketHandler.BeginSession (context.HttpContext, element);
             var initialHtml = element.OuterHtml;
-            Console.WriteLine(initialHtml);
             var html = UI.RenderTemplate (WebSocketHandler.WebSocketPath + "?id=" + sessionId, title: title, initialHtml: initialHtml);
             var htmlBytes = Encoding.UTF8.GetBytes (html);
             response.ContentLength = htmlBytes.Length;
@@ -31,5 +37,20 @@ namespace Ooui.AspNetCore
                 await s.WriteAsync (htmlBytes, 0, htmlBytes.Length).ConfigureAwait (false);
             }
         }
+
+        static double GetCookieDouble (IRequestCookieCollection cookies, string key, double min, double def, double max)
+        {
+            if (cookies.TryGetValue (key, out var s)) {
+                if (double.TryParse (s, out var d)) {
+                    if (d < min) return min;
+                    if (d > max) return max;
+                    return d;
+                }
+                return def;
+            }
+            else {
+                return def;
+            }
+        }
     }
 }

Ooui/Client.js

@@ -35,12 +35,29 @@ function getSize () {
     };
 }
 
+function setCookie (name, value, days) {
+    var expires = "";
+    if (days) {
+        var date = new Date ();
+        date.setTime(date.getTime () + (days*24*60*60*1000));
+        expires = "; expires=" + date.toUTCString();
+    }
+    document.cookie = name + "=" + (value || "")  + expires + "; path=/";
+}
+
+function saveSize (s) {
+    setCookie ("oouiWindowWidth", s.width, 7);
+    setCookie ("oouiWindowHeight", s.height, 7);
+}
+
 // Main entrypoint
 function ooui (rootElementPath) {
 
+    var initialSize = getSize ();
+    saveSize (initialSize);
+
     return;
 
-    var initialSize = getSize ();
     var wsArgs = (rootElementPath.indexOf("?") >= 0 ? "&" : "?") +
         "w=" + initialSize.width + "&h=" + initialSize.height;