Rockbox

## This was tried out with Sansa Fuzev2 simulator version d392da8-140922, built from git on a 64 bit Linux system ##

I discovered something which seems to be a bug somewhere in the place where WPS get interpreted or rendered.

When I use a scrolling line just after a line containing sublines, the scrolling line stops scrolling as soon as the sublines change the first time.

Below are steps to reproduce it on the UI simulator for the Sansa Fuzev2. I think it also works without using a clear configuration. I haven’t tested with a real device, only with the simulator.

Attached are a .wps-file showing the buggy behaviour (’scrollline_after_sublines_bug.buggy.wps’), and a .wps-file working correctly (’scrollline_after_sublines_bug.workaround.wps’), which are the same files as quoted below.

STEPS TO REPRODUCE:

(0) Use Sansa Fuzev2 simulator version d392da8-140922, build from git on a 64 bit Linux system.

(1) Use a clear configuration, so erase

    .rockbox/.playlist_control
    .rockbox/config.cfg
    .rockbox/nvram.bin
    .rockbox/database.ignore
  in your 'simdisk' directory.

(2) Start the rockbox UI simulator

(3) Change the theme to ‘rockbox_failsafe’, i.e. in the menu, do the following:

• ‘Settings’ → ‘Theme Settings’ → ‘Browse Theme Files’ → ‘rockbox_failsafe.cfg’
• ‘Settings’ → ‘Theme Settings’ → ‘While Playing Screen’ → ‘rockbox_failsafe.wps’
• ‘Settings’ → ‘Theme Settings’ → ‘Radio Screen’ → ‘rockbox_failsafe.fms’
• ‘Settings’ → ‘Theme Settings’ → ‘Base Skin’ → ‘rockbox_failsafe.sbs’

(4) Use the following .wps-file as the “While Playing Screen” skin:

=⇒ # Two sublines:
Text1;Text2
# A long line, scrolling:
%sA very long text which is meant to scroll because it is longer than the screen is wide.
# Another line of just text (Not needed to reproduce the bug, but if it is swapped with the long line above, the long line scrolles correctly):
Textline.
#### Here the following Bug appears:
# When the Line ‘Text1;Text2’ changes the sublines the first time, the subsequent line stops scrolling. It happens when the sublines change; as when you use ‘%t(5)Text1;Text2’, the scrolling stops only after 5 seconds, when the sublines actually change.
⇐=

Workaround:
(4a) Put the scrolling line not directly after a line with sublines. The following .wps as the “While Playing Screen” skin works:

=⇒ # Two sublines:
Text1;Text2
# Another line of just text. Needed to make the long line scrolling correctly:
Textline.
# A long line, scrolling:
%sA very long text which is meant to scroll because it is longer than the screen is wide.
#### Here the bug does not appear, the long line scrolls corretly. But when the long scrolling line is put just below the line with the sublines, it stops scrolling as soon as the sublines change for the first time.
⇐=