1 files changed, 27 insertions, 17 deletions

diff --git a/hesla.es b/hesla.es
index 4952662..8f94bbf 100644
--- a/hesla.es
+++ b/hesla.es
@@ -2,10 +2,13 @@ import {ActivePage} from "activePage";
 
 if (!Date.prototype.toISODateString) {
   (function() {
+    function pad(n) {
+      return n < 10 ? '0' + n : n;
+    }
     Date.prototype.toISODateString = function() {
-      return this.toISOString().split('T')[0]
+      return this.getFullYear() + '-' + pad(this.getMonth() + 1) +
+        '-' + pad(this.getDate());
     };
-
   }());
 }
 
@@ -13,16 +16,28 @@ export class Hesla extends ActivePage {
   constructor() {
     super();
     document.getElementById("czech_nav").addEventListener("click",
-      (evt: TouchEvent) => {
+      (evt) => {
         localStorage.setItem("language", "cs");
         this.lang_reload();
       }, false);
 
     document.getElementById("german_nav").addEventListener("click",
-      (evt: TouchEvent) => {
+      (evt) => {
         localStorage.setItem("language", "de");
         this.lang_reload();
       }, false);
+
+    // requires IE 10, Opera 12.10, Safari 7,
+    // FIXME Android browser requires 4.4 and has only
+    // webkitHidden and the event is webkitvisibilitychange
+    if (typeof document.hidden !== "undefined") {
+        document.addEventListener("visibilitychange",
+          (evt) => {
+            if (! document.hidden) {
+                this.today();
+            }
+          }, false);
+    }
   }
 
   /**
@@ -50,9 +65,7 @@ export class Hesla extends ActivePage {
       this.prev();
     }
     else if (Math.abs(distY) > negligible) {
-      console.log("jump to today!");
-      this.cur_watchword = new Date();
-      this.display();
+      this.today();
     }
   }
 
@@ -81,25 +94,22 @@ export class Hesla extends ActivePage {
   /**
    * Display losungen for given day
    *
-   * @param new_date String with ISO formatted date (optional)
-   *    or Number with the relative distance of the day from the date
-   *    currently displayed.
-   *
    * Displays the Losungen for the given date (or today if not defined)
    */
   display() {
-    // first scroll then switch to avoid blinking of the page
-    window.scroll(0, 0);
+    super.display();
 
-    var visibleElems = document.getElementsByClassName("visible");
-    Array.prototype.forEach.call(visibleElems, function(e) {
-      e.classList.remove("visible");
-    });
     console.log("cur_watchword = " + this.cur_watchword);
     document.getElementById(this.cur_watchword.toISODateString()).
       classList.add("visible");
   }
 
+  today() {
+    console.log("jump to today!");
+    this.cur_watchword = new Date();
+    this.display();
+  }
+
   shiftDate(shift) {
     var cur_date = this.cur_watchword;
     cur_date.setDate(cur_date.getDate() + shift);