Modified behaviour of bumblebee.output.scrollable to allow for custom scroll speed and toggling "bouncing" of text, and applied it to deadbeef and spotify

bumblebee/modules/deadbeef.py

@@ -2,13 +2,10 @@
 
 """Displays the current song being played in DeaDBeeF and
 provides some media control bindings.
-
 Left click toggles pause, scroll up skips the current song,
 scroll down returns to the previous song.
-
 Requires the following library:
     * subprocess
-
 Parameters:
     * deadbeef.format:   Format string (defaults to "{artist} - {title}")
                          Available values are: {artist}, {title}, {album}, {length},
@@ -17,7 +14,6 @@ Parameters:
     * deadbeef.previous: Change binding for previous song (default is left click)
     * deadbeef.next:     Change binding for next song (default is right click)
     * deadbeef.pause:    Change binding for toggling pause (default is middle click)
-
     Available options for deadbeef.previous, deadbeef.next and deadbeef.pause are:
         LEFT_CLICK, RIGHT_CLICK, MIDDLE_CLICK, SCROLL_UP, SCROLL_DOWN
 """
@@ -26,6 +22,8 @@ import bumblebee.input
 import bumblebee.output
 import bumblebee.engine
 
+from bumblebee.output import scrollable
+
 try:
     import subprocess
 except ImportError:
@@ -59,6 +57,7 @@ class Module(bumblebee.engine.Module):
         engine.input.register_callback(self, button=buttons[pause_button],
             cmd=cmd + "--play-pause")
 
+    @scrollable
     def deadbeef(self, widget):
         return str(self._song)
 

bumblebee/modules/spotify.py

@@ -1,17 +1,14 @@
 # pylint: disable=C0111,R0903
 
 """Displays the current song being played
-
 Requires the following library:
     * python-dbus
-
 Parameters:
     * spotify.format:   Format string (defaults to "{artist} - {title}")
                         Available values are: {album}, {title}, {artist}, {trackNumber}, {playbackStatus}
     * spotify.previous: Change binding for previous song (default is left click)
     * spotify.next:     Change binding for next song (default is right click)
     * spotify.pause:    Change binding for toggling pause (default is middle click)
-
     Available options for spotify.previous, spotify.next and spotify.pause are:
         LEFT_CLICK, RIGHT_CLICK, MIDDLE_CLICK, SCROLL_UP, SCROLL_DOWN
 """
@@ -20,6 +17,8 @@ import bumblebee.input
 import bumblebee.output
 import bumblebee.engine
 
+from bumblebee.output import scrollable
+
 try:
     import dbus
 except ImportError:
@@ -53,6 +52,7 @@ class Module(bumblebee.engine.Module):
         engine.input.register_callback(self, button=buttons[pause_button],
             cmd=cmd + "PlayPause")
 
+    @scrollable
     def spotify(self, widget):
         return str(self._song)
 

bumblebee/output.py

@@ -17,14 +17,30 @@ def scrollable(func):
         if len(text) <= width:
             return text
         # we need to shorten
+        
+        try:
+            bounce = int(module.parameter("scrolling.bounce", 1))
+        except ValueError:
+            bounce = 1
+        try:
+            scroll_speed = int(module.parameter("scrolling.speed", 1))
+        except ValueError:
+            scroll_speed = 1
         start = widget.get("scrolling.start", -1)
         direction = widget.get("scrolling.direction", "right")
-        start += 1 if direction == "right" else -1
-        widget.set("scrolling.start", start)
-        if width + start >= len(text):
+        start += scroll_speed if direction == "right" else -(scroll_speed)
+        
+        if width + start > len(text) + (scroll_speed -1):
+            if bounce:
                 widget.set("scrolling.direction", "left")
-        if start <= 0:
+            else:
+                start = 0
+        elif start <= 0:
+            if bounce:
                 widget.set("scrolling.direction", "right")
+            else:
+                start = len(text)
+        widget.set("scrolling.start", start)
         text = text[start:width+start]
 
         return text