--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/classic/splitter.js	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,222 @@
+/**
+ * Roundcube splitter GUI class
+ *
+ * @licstart  The following is the entire license notice for the
+ * JavaScript code in this file.
+ *
+ * Copyright (c) 2006-2014, The Roundcube Dev Team
+ *
+ * The JavaScript code in this page is free software: you can redistribute it
+ * and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * @licend  The above is the entire license notice
+ * for the JavaScript code in this file.
+ *
+ * @constructor
+ */
+function rcube_splitter(attrib)
+{
+  this.p1id = attrib.p1;
+  this.p2id = attrib.p2;
+  this.id = attrib.id ? attrib.id : this.p1id + '_' + this.p2id + '_splitter';
+  this.orientation = attrib.orientation;
+  this.horizontal = (this.orientation == 'horizontal' || this.orientation == 'h');
+  this.pos = attrib.start ? attrib.start * 1 : 0;
+  this.relative = attrib.relative ? true : false;
+  this.drag_active = false;
+  this.callback = attrib.callback;
+
+  var me = this;
+
+  this.init = function()
+  {
+    this.p1 = document.getElementById(this.p1id);
+    this.p2 = document.getElementById(this.p2id);
+
+    // create and position the handle for this splitter
+    this.p1pos = this.relative ? $(this.p1).position() : $(this.p1).offset();
+    this.p2pos = this.relative ? $(this.p2).position() : $(this.p2).offset();
+
+    if (this.horizontal) {
+      var top = this.p1pos.top + this.p1.offsetHeight;
+      this.layer = new rcube_layer(this.id, {x: 0, y: top, height: 10,
+        width: '100%', vis: 1, parent: this.p1.parentNode});
+    }
+    else {
+      var left = this.p1pos.left + this.p1.offsetWidth;
+      this.layer = new rcube_layer(this.id, {x: left, y: 0, width: 10,
+        height: '100%', vis: 1,  parent: this.p1.parentNode});
+    }
+
+    this.elm = this.layer.elm;
+    this.elm.className = 'splitter '+(this.horizontal ? 'splitter-h' : 'splitter-v');
+    this.elm.unselectable = 'on';
+
+    // add the mouse event listeners
+    $(this.elm).mousedown(onDragStart);
+    if (bw.ie)
+      $(window).resize(onResize);
+
+    // read saved position from cookie
+    var cookie = rcmail.get_cookie(this.id);
+    if (cookie && !isNaN(cookie)) {
+      this.pos = parseFloat(cookie);
+      this.resize();
+    }
+    else if (this.pos) {
+      this.resize();
+      this.set_cookie();
+    }
+  };
+
+  /**
+   * Set size and position of all DOM objects
+   * according to the saved splitter position
+   */
+  this.resize = function()
+  {
+    if (this.horizontal) {
+      var lh = this.layer.height;
+      this.p1.style.height = Math.floor(this.pos - this.p1pos.top - lh / 2) + 'px';
+      this.p2.style.top = Math.ceil(this.pos + lh / 2) + 'px';
+      this.layer.move(this.layer.x, Math.round(this.pos - lh / 2 + 1));
+      if (bw.ie) {
+        var new_height = parseInt(this.p2.parentNode.offsetHeight, 10) - parseInt(this.p2.style.top, 10) - (bw.ie8 ? 2 : 0);
+        this.p2.style.height = (new_height > 0 ? new_height : 0) + 'px';
+      }
+    }
+    else {
+      this.p1.style.width = Math.floor(this.pos - this.p1pos.left - this.layer.width / 2) + 'px';
+      this.p2.style.left = Math.ceil(this.pos + this.layer.width / 2) + 'px';
+      this.layer.move(Math.round(this.pos - this.layer.width / 2 + 1), this.layer.y);
+      if (bw.ie) {
+        var new_width = parseInt(this.p2.parentNode.offsetWidth, 10) - parseInt(this.p2.style.left, 10) ;
+        this.p2.style.width = (new_width > 0 ? new_width : 0) + 'px';
+      }
+    }
+    $(this.p2).resize();
+    $(this.p1).resize();
+  };
+
+  /**
+   * Handler for mousedown events
+   */
+  function onDragStart(e)
+  {
+    me.drag_active = true;
+
+    // disable text selection while dragging the splitter
+    if (bw.konq || bw.chrome || bw.safari)
+      document.body.style.webkitUserSelect = 'none';
+
+    me.p1pos = me.relative ? $(me.p1).position() : $(me.p1).offset();
+    me.p2pos = me.relative ? $(me.p2).position() : $(me.p2).offset();
+
+    // start listening to mousemove events
+    $(document).bind('mousemove.'+me.id, onDrag).bind('mouseup.'+me.id, onDragStop);
+
+    // enable dragging above iframes
+    $('iframe').each(function() {
+      $('<div class="iframe-splitter-fix"></div>')
+        .css({background: '#fff',
+          width: this.offsetWidth+'px', height: this.offsetHeight+'px',
+          position: 'absolute', opacity: '0.001', zIndex: 1000
+        })
+        .css($(this).offset())
+        .appendTo('body');
+      });
+  };
+
+  /**
+   * Handler for mousemove events
+   */
+  function onDrag(e)
+  {
+    if (!me.drag_active)
+      return false;
+
+    // with timing events dragging action is more responsive
+    window.clearTimeout(me.ts);
+    me.ts = window.setTimeout(function() { onDragAction(e); }, 1);
+
+    return false;
+  };
+
+  function onDragAction(e)
+  {
+    var pos = rcube_event.get_mouse_pos(e);
+
+    if (me.relative) {
+      var parent = $(me.p1.parentNode).offset();
+      pos.x -= parent.left;
+      pos.y -= parent.top;
+    }
+
+    if (me.horizontal) {
+      if (((pos.y - me.layer.height * 1.5) > me.p1pos.top) && ((pos.y + me.layer.height * 1.5) < (me.p2pos.top + me.p2.offsetHeight))) {
+        me.pos = pos.y;
+        me.resize();
+      }
+    }
+    else if (((pos.x - me.layer.width * 1.5) > me.p1pos.left) && ((pos.x + me.layer.width * 1.5) < (me.p2pos.left + me.p2.offsetWidth))) {
+      me.pos = pos.x;
+      me.resize();
+    }
+
+    me.p1pos = me.relative ? $(me.p1).position() : $(me.p1).offset();
+    me.p2pos = me.relative ? $(me.p2).position() : $(me.p2).offset();
+  };
+
+  /**
+   * Handler for mouseup events
+   */
+  function onDragStop(e)
+  {
+    me.drag_active = false;
+
+    // resume the ability to highlight text
+    if (bw.konq || bw.chrome || bw.safari)
+      document.body.style.webkitUserSelect = 'auto';
+
+    // cancel the listening for drag events
+    $(document).unbind('.' + me.id);
+
+    // remove temp divs
+    $('div.iframe-splitter-fix').remove();
+
+    me.set_cookie();
+
+    if (typeof me.callback == 'function')
+      me.callback(me);
+
+    return bw.safari ? true : rcube_event.cancel(e);
+  };
+
+  /**
+   * Handler for window resize events
+   */
+  function onResize(e)
+  {
+    if (me.horizontal) {
+      var new_height = parseInt(me.p2.parentNode.offsetHeight, 10) - parseInt(me.p2.style.top, 10) - (bw.ie8 ? 2 : 0);
+      me.p2.style.height = (new_height > 0 ? new_height : 0) +'px';
+    }
+    else {
+      var new_width = parseInt(me.p2.parentNode.offsetWidth, 10) - parseInt(me.p2.style.left, 10);
+      me.p2.style.width = (new_width > 0 ? new_width : 0) + 'px';
+    }
+  };
+
+  /**
+   * Saves splitter position in cookie
+   */
+  this.set_cookie = function()
+  {
+    var exp = new Date();
+    exp.setYear(exp.getFullYear() + 1);
+    rcmail.set_cookie(this.id, this.pos, exp);
+  };
+
+} // end class rcube_splitter