update for the calculation of layer position

@@ -3,8 +3,7 @@
  * @author: bikai<kai.bi@yoho.cn>
  * @date: 2015/10/28
  */
-var $ = require('jquery'),
-    security = require('../plugin/security');
+var $ = require('jquery');
 
 var $searchBox = $('.search-box'),
     $box = $('.box'),
@@ -44,9 +43,6 @@ $searchBox.children('.clear-text').on('touchstart', function() {
 });
 
 $searchBox.children('.search-icon').on('touchstart', function() {
-    if (security.hasDangerInput()) {
-      return false;
-    }
     $indexSearch.submit();
 });
 
@@ -74,6 +70,7 @@ $channelLink.on('touchstart', function() {
 });
 var updateLayerPosition = (function() {
    var init = false;
+   var windowViewHeight = 0;
    return function() {
      var winHeight = window.innerHeight;
      var bodyHeight = $doc.height();
@@ -82,11 +79,22 @@ var updateLayerPosition = (function() {
      var layerPaddingTop = parseInt($appFloatLayer.css('padding-top'));
      var layerPaddingBottom = parseInt($appFloatLayer.css('padding-bottom'));
      var newPosition;
+
      if(init){
-       newPosition = bodyHeight - winHeight- scrollTopPosition;
+       if (windowViewHeight - winHeight > 200){//keyboard is shown
+          newPosition = bodyHeight - winHeight - scrollTopPosition - (layerHeight + layerPaddingTop + layerPaddingBottom);
+       } else {
+          newPosition = bodyHeight - winHeight -scrollTopPosition;
+       }
+
+       if (scrollTopPosition + winHeight === bodyHeight) {
+         console.log('got end');
+         newPosition = 0;
+       }
      }else{
-       init = true;
+       windowViewHeight = winHeight;
        newPosition = bodyHeight - winHeight - scrollTopPosition + layerHeight + layerPaddingTop + layerPaddingBottom;
+       init = true;
      }
      $appFloatLayer.css({
        'position': 'relative',
@@ -96,8 +104,20 @@ var updateLayerPosition = (function() {
 })();
 
 $win.scroll(function() {
+
   updateLayerPosition();
+  //clearTimeout($.data(this, 'scrollTimer'));
+  //$.data(this, 'scrollTimer', setTimeout(function() {
+  //    updateLayerPosition();
+  //}, 2));
 });
 
+//$search.focusin(function() {
+//  $body.css('overflow','hidden');
+//});
+//
+//$search.focusout(function() {
+//  $body.css('overflow','auto');
+//});
 
 $doc.on('ready', updateLayerPosition);