- Fix drag&drop with scrolling on IE (#1485786)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG RoundCube Webmail
 ===========================
 
+- Fix drag&drop with scrolling on IE (#1485786)
 - Fix adding signature separator in html mode (#1485350)
 - Fix opening attachment marks message as read (#1485803)
 - Fix 'temp_dir' does not support relative path under Windows (#1484529)

program/js/app.js

@@ -53,7 +53,6 @@ function rcube_webmail()
   this.env.bin_path = './bin/';
   this.env.blankpage = 'program/blank.gif';
 
-
   // set environment variable(s)
   this.set_env = function(p, value)
     {
@@ -1182,6 +1181,9 @@ function rcube_webmail()
 
   this.drag_start = function(list)
   {
+       this.initialBodyScrollTop = bw.ie ? 0 : window.pageYOffset;
+       this.initialMailBoxScrollTop = document.getElementById("mailboxlist-container").scrollTop;
+
     var model = this.task == 'mail' ? this.env.mailboxes : this.env.address_sources;
 
     this.drag_active = true;
@@ -1213,10 +1215,17 @@ function rcube_webmail()
     {
     if (this.gui_objects.folderlist && this.env.folder_coords)
       {
+      // offsets to compensate for scrolling while dragging a message
+      var boffset = bw.ie ? -document.documentElement.scrollTop : this.initialBodyScrollTop;
+      var moffset = this.initialMailBoxScrollTop-document.getElementById('mailboxlist-container').scrollTop;
+      var toffset = -moffset-boffset;
+
       var li, pos, mouse;
       mouse = rcube_event.get_mouse_pos(e);
       pos = this.env.folderlist_coords;
 
+      mouse.y += toffset;
+
       // if mouse pointer is outside of folderlist
       if (mouse.x < pos.x1 || mouse.x >= pos.x2 
 	    || mouse.y < pos.y1 || mouse.y >= pos.y2)

program/js/list.js

@@ -774,7 +774,7 @@ drag_mouse_move: function(e)
   if (this.drag_active && this.draglayer)
   {
     var pos = rcube_event.get_mouse_pos(e);
-    this.draglayer.move(pos.x+20, pos.y-5);
+    this.draglayer.move(pos.x+20, bw.ie ? pos.y-5+document.documentElement.scrollTop : pos.y-5);
     this.trigger_event('dragmove', e);
   }