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[github/wallabag/wallabag.git] / app / Resources / static / themes / _global / js / restoreScroll.js

diff --git a/app/Resources/static/themes/_global/js/restoreScroll.js b/app/Resources/static/themes/_global/js/restoreScroll.js
new file mode 100644 (file)
index 0000000..e63d06c
--- /dev/null
+++ b/app/Resources/static/themes/_global/js/restoreScroll.js
@@ -0,0 +1,25 @@
+function supportsLocalStorage() {
+    try {
+        return 'localStorage' in window && window['localStorage'] !== null;
+    } catch (e) {
+        return false;
+    }
+}
+
+function savePercent(id, percent) {
+    if (!supportsLocalStorage()) { return false; }
+    localStorage["wallabag.article." + id + ".percent"] = percent;
+    return true;
+}
+
+function retrievePercent(id) {
+    if (!supportsLocalStorage()) { return false; }
+
+    var bheight = $(document).height();
+    var percent = localStorage["wallabag.article." + id + ".percent"];
+    var scroll = bheight * percent;
+
+    $('html,body').animate({scrollTop: scroll}, 'fast');
+
+    return true;
+}