Add pixel text editor and built-in messages

pixel/messages.go

@@ -0,0 +1,25 @@
+package pixel
+
+import "fmt"
+
+var messages = map[Locale]map[string]string{
+	En: {
+		"ok": "OK", "cancel": "CANCEL", "yes": "YES", "no": "NO", "close": "CLOSE",
+		"continue": "CONTINUE?", "game_over": "GAME OVER", "loading": "NOW LOADING",
+		"search": "SEARCH", "empty": "NO ITEMS",
+	},
+	Zh: {
+		"ok": "确定", "cancel": "取消", "yes": "是", "no": "否", "close": "关闭",
+		"continue": "继续？", "game_over": "游戏结束", "loading": "读取中",
+		"search": "搜索", "empty": "空空如也",
+	},
+}
+
+// Msg is built-in copy in the frame's locale.
+func (k Kit) Msg(key string) string {
+	s, ok := messages[k.locale][key]
+	if !ok {
+		panic(fmt.Sprintf("pixel: no message %q for locale %d", key, k.locale))
+	}
+	return s
+}