playground: Reload snippet on hash change.

playground/playground.go

@@ -247,6 +247,32 @@ func main() {
 				})
 			}()
 		})
+
+		// Start watching for hashchange events, and reload snippet if it happens.
+		dom.GetWindow().Top().AddEventListener("hashchange", false, func(event dom.Event) {
+			event.PreventDefault()
+
+			if strings.HasPrefix(location.Hash, "#/") {
+				id := location.Hash[2:]
+
+				req := xhr.NewRequest("GET", "http://"+snippetStoreHost+"/p/"+id)
+				req.ResponseType = xhr.ArrayBuffer
+				go func() {
+					err := req.Send(nil)
+					if err != nil || req.Status != 200 {
+						scope.Apply(func() {
+							scope.Set("output", []Line{Line{"type": "err", "content": `failed to load snippet "` + id + `"`}})
+						})
+						return
+					}
+
+					data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
+					scope.Apply(func() {
+						scope.Set("code", string(data))
+					})
+				}()
+			}
+		})
 	})
 }
 

playground/playground.js

@@ -64848,6 +64848,33 @@ $packages["main"] = (function() {
 					/* */ case -1: } return; } }; $f.$blocking = true; return $f;
 				}), []);
 			}), funcType$1);
+			dom.GetWindow().Top().AddEventListener("hashchange", false, (function(event) {
+				var id$1, req$1;
+				event.PreventDefault();
+				if (strings.HasPrefix($internalize(location.URLUtils.Object.hash, $String), "#/")) {
+					id$1 = $internalize(location.URLUtils.Object.hash, $String).substring(2);
+					req$1 = xhr.NewRequest("GET", "http://snippets.gotools.org/p/" + id$1);
+					req$1.Object.responseType = $externalize("arraybuffer", $String);
+					$go((function($b) {
+						var $this = this, $args = arguments, $r, $s = 0, _r, err, data;
+						/* */ if($b !== $BLOCKING) { $nonblockingCall(); }; var $f = function() { s: while (true) { switch ($s) { case 0:
+						_r = req$1.Send($ifaceNil, $BLOCKING); /* */ $s = 1; case 1: if (_r && _r.$blocking) { _r = _r(); }
+						err = _r;
+						if (!($interfaceIsEqual(err, $ifaceNil)) || !((($parseInt(req$1.Object.status) >> 0) === 200))) {
+							scope.Apply((function() {
+								var _map, _key;
+								scope.Object.output = $externalize(new sliceType([(_map = new $Map(), _key = "type", _map[_key] = { k: _key, v: "err" }, _key = "content", _map[_key] = { k: _key, v: "failed to load snippet \"" + id$1 + "\"" }, _map)]), sliceType);
+							}));
+							return;
+						}
+						data = $assertType($internalize(new ($global.Uint8Array)(req$1.Object.response), $emptyInterface), sliceType$2);
+						scope.Apply((function() {
+							scope.Object.code = $externalize($bytesToString(data), $String);
+						}));
+						/* */ case -1: } return; } }; $f.$blocking = true; return $f;
+					}), []);
+				}
+			}));
 		}));
 	};
 	setupEnvironment = function(scope) {