Add expand_all/collapse_all treelist methods (#6860)

* add expand_all()/collapse_all() treelist methods
* prevent possible race condition in rcmail.folder_collapsed()

program/js/app.js

@@ -1776,6 +1776,9 @@ function rcube_webmail()
 
   this.folder_collapsed = function(node)
   {
+    if (this.folder_collapsed_timer)
+      clearTimeout(this.folder_collapsed_timer);
+
     var prefname = this.env.task == 'addressbook' ? 'collapsed_abooks' : 'collapsed_folders',
       old = this.env[prefname];
 
@@ -1794,7 +1797,7 @@ function rcube_webmail()
 
     if (!this.drag_active) {
       if (old !== this.env[prefname])
-        this.command('save-pref', { name: prefname, value: this.env[prefname] });
+        this.folder_collapsed_timer = setTimeout(function(){ ref.command('save-pref', { name: prefname, value: ref.env[prefname] }); }, 10)
 
       if (this.env.unread_counts)
         this.set_unread_count_display(node.id, false);

program/js/treelist.js

@@ -81,6 +81,8 @@ function rcube_treelist_widget(node, p)
   this.container = container;
   this.expand = expand;
   this.collapse = collapse;
+  this.expand_all = expand_all;
+  this.collapse_all = collapse_all;
   this.select = select;
   this.render = render;
   this.reset = reset;
@@ -210,10 +212,8 @@ function rcube_treelist_widget(node, p)
     });
   }
 
-  /////// private methods
-
   /**
-   * Collaps a the node with the given ID
+   * Collapse a the node with the given ID
    */
   function collapse(id, recursive, set)
   {
@@ -253,6 +253,30 @@ function rcube_treelist_widget(node, p)
     }
   }
 
+  /**
+   * Collapse all expanded nodes
+   */
+  function collapse_all()
+  {
+    $.each(indexbyid, function(id, data) {
+      if (data.children.length > 0 && !data.collapsed) {
+        collapse(id);
+      }
+    });
+  }
+
+  /**
+   * Expand all collapsed nodes
+   */
+  function expand_all()
+  {
+    $.each(indexbyid, function(id, data) {
+      if (data.children.length > 0 && data.collapsed) {
+        collapse(id, false, false);
+      }
+    });
+  }
+
   /**
    * Select a tree node by it's ID
    */