Improve message previewpane - less loading - patch provided

[Emil Wojak]

I love the preview pane feature, but there are some minor issues I'd like corrected.
First of all, it would be nice, if the preview pane wasn't filled if it doesn't need to, I mean, I don't wan't it to show a message if I:

a) select a single message by ctrl+clicking it - I know it works when having at least one message selected already, but I'm talking about a single selection. This way, when I select multiple messages the first one won't be previewed either.

b) drag a message

It matters to me mostly because of my extremely slow connection (yes, modems still exist) :)
So here's an attempt to accomplish the above, unfortunately I don't know if this is the correct way you developers would see it implemented.

Index: program/js/list.js
===================================================================
--- program/js/list.js  (wersja 536)
+++ program/js/list.js  (kopia robocza)
@@ -35,6 +35,7 @@
   this.shiftkey = false;

   this.multiselect = false;
+  this.multi_selecting = false;
   this.draggable = false;
   this.keyboard = false;

@@ -216,7 +217,7 @@
   if (this.draggable && this.selection.length)
   {
     this.drag_start = true;
-       this.drag_mouse_start = rcube_event.get_mouse_pos(e);
+    this.drag_mouse_start = rcube_event.get_mouse_pos(e);
     rcube_event.add_listener({element:document, event:'mousemove', object:this, method:'drag_mouse_move'});
     rcube_event.add_listener({element:document, event:'mouseup', object:this, method:'drag_mouse_up'});
   }
@@ -304,6 +305,7 @@
   {
     this.shift_start = id;
     this.highlight_row(id, false);
+    this.multi_selecting = false;
   }
   else
   {
@@ -327,6 +329,7 @@
         this.highlight_row(id, false);
         break;
     }
+    this.multi_selecting = true;
   }

   // trigger event if selection changed
Index: program/js/app.js
===================================================================
--- program/js/app.js   (wersja 536)
+++ program/js/app.js   (kopia robocza)
@@ -125,7 +125,7 @@
           this.message_list.addEventListener('dblclick', function(o){ p.msglist_dbl_click(o); });
           this.message_list.addEventListener('keypress', function(o){ p.msglist_keypress(o); });
           this.message_list.addEventListener('select', function(o){ p.msglist_select(o); });
-          this.message_list.addEventListener('dragstart', function(o){ p.drag_active = true; });
+          this.message_list.addEventListener('dragstart', function(o){ p.drag_active = true; if (p.preview_timer) clearTimeout(p.preview_timer); });
           this.message_list.addEventListener('dragend', function(o){ p.drag_active = false; });

           this.message_list.init();
@@ -147,15 +147,9 @@
           {
           this.enable_command('show', 'reply', 'reply-all', 'forward', 'moveto', 'delete', 'viewsource', 'print', 'load-attachment', true);
           if (this.env.next_uid)
-            {
-            this.enable_command('nextmessage', true);
-            this.enable_command('lastmessage', true);
-            }
+           this.enable_command('nextmessage', 'lastmessage', true);
           if (this.env.prev_uid)
-            {
-            this.enable_command('previousmessage', true);
-            this.enable_command('firstmessage', true);
-            }
+           this.enable_command('previousmessage', 'firstmessage', true);
           }

         // make preview/message frame visible
@@ -1097,7 +1091,7 @@
       }

     // start timer for message preview (wait for double click)
-    if (selected && this.env.contentframe)
+    if (selected && this.env.contentframe && !list.multi_selecting)
       this.preview_timer = setTimeout(function(){ ref.msglist_get_preview(); }, this.dblclick_time + 10);
     else if (this.env.contentframe)
       this.show_messageframe(false);

[seansan]

review in 0.1.1

[robin]

Thanks, done in [21168d21].