Austin Beam

#!/bin/bash
# file: pandora_hotkeys
OFF=-1; DEFAULT=0; ON=1
 
# Exit Variable
EXIT_STATUS=0
 
# Pandora path - optional setting that will allow the application to launch
# Pandora if a hotkey is pressed while Pandora is closed. If this path is not
# given, pressing a hotkey with Pandora closed will cause the hotkey to perform
# its default behavior.
#PAND_PATH="/opt/Pandora/bin/Pandora"
 
# Default operations - if you want the script to be able to perform system-wide
# default operations when Pandora isn't running, leave this option set to $DEFAULT.
# This can be overridden by setting this value to $OFF, but it is also overridden
# if the above setting for PAND_PATH is set.
DEFAULT_OPS=$DEFAULT
#DEFAULT_OPS=$OFF
 
# Minimized workaround - if you typically minimize Pandora, and you don't mind
# the script removing Pandora from Gnome's window selector after it is through,
# setting MINIMIZE_WORKAROUND to $ON will allow the script to work even when
# Pandora is minimized. Because the Pandora Air app uses a notification icon,
# I could see where users of the Air app might not mind this side effect. Also
# note, though, that enabling this workaround means the window will be brought
# to the front every time a hotkey is pressed, which is also typically undesirable.
# The map/unmap process does happen quickly though, and focus is still restored to
# the original window.
MINIMIZE_WORKAROUND=$DEFAULT
#MINIMIZE_WORKAROUND=$ON
 
# Function to print the script's help
printHelp(){
  echo "Usage: pandora_hotkeys OPERATION
Perform OPERATION in Pandora.
If Pandora is not running, perform the expected system-wide equivalent action.
 
Other behaviors are possible by editing the script.
See exhaustive help for further information about this and for other notes.
 
The following operations are supported:
  help      - Show help
  help-all  - Show exhaustive help
 
  <command> - <Action>    (<System-wide equivalent>)
  pause     - Play/Pause  (Play/Pause)
  next      - Next        (Next)
  like      - Like        (No system-wide equivalent)
  dislike   - Dislike     (No system-wide equivalent)
  upvol     - Volume Up   (Volume Up)
  downvol   - Volume Down (Volume Down)
"
# I couldn't get these to work for some odd reason, but feel free to try.
# What I thought should work is included and commented below.
# I suggest if you want to use these features to simply call the script
# multiple times using '&&' when creating your hotkey.
# maxvol    - Maximum Volume (Max Volume)
# mute      - Mute           (Mute)
 
  if [ "$1" == "ALL" ]; then
    echo "
Have the script launch Pandora if it is not running when a hotkey is pressed:
  This script is intended to allow the user the ability to manipulate Pandora
  with global hotkeys, while still maintaing the hotkeys' default behavior when
  Pandora is not running on the system. If the user desires, the script can
  alternatively launch Pandora if it is not running when a hotkey is pressed.
  These options can be set as instructed below. If the user desires that
  Pandora alternatively be launched when a hotkey is pressed rather than the
  default behavior, the user should set the PAND_PATH variable in the script
  to the location of Pandora on their system. This will override the DEFAULT_OPS
  setting.
 
Get the script working with browser-based Pandora:
  By default, the script is not configured to work with browser-based
  Pandora. Fortunately, there is an easy way to make it work with
  browser-based Pandora. Change the following line:
  PAND_WIN=\$(xdotool search --class \"Pandora\" | head -n 1)
  to:
  PAND_WIN=\$(xdotool search --title \"Pandora\" | head -n 1)
  This will make the script work with browser-based Pandora. There
  are caveats to this though, which are described below.
  Caveats:
    A) If there are multiple windows with 'Pandora' in the title the
       window order might be such that the script tries the operation
       on that window rather than the one you want. This typically does
       no harm, but it will cause the script not to work. It is for this
       reason that the '--title' option is not specified by default.
       Resolution - Close any other windows with 'Pandora' somewhere in
                    the title.
 
    B) It seems that by default keyboard shortcuts in the browser window do
       not get captured by the Pandora flash app.
       Resolution - You must click on the flash application inside the
                    browser manually (a single time) before the script
                    will work. After you have clicked on the flash
                    application one time, all of the shortcuts sent to
                    that window will be captured by the flash application.
 
Limitations:
  Unfortunately, if you minimize Pandora, the script will stop working.
  The best way to work around this limitation is to simply send Pandora
  to the back when it is not being used. For those unable to break the
  habit of minimizing the window, there is a workaround to this limitation,
  but it will send the Pandora window to the back and remove the window
  from Gnome's window selector after it is unmapped. Also, the script
  must bring the window to the front before unmapping it to gain focus
  of the window. This is typically an undesirable side effect, and thus
  the workaround is disabled by default.
 
  To enable it, change MINIMIZE_WORKAROUND to $ON in the script.
 
Notes:
  The script has been tested exclusively in 64-bit Ubuntu Lucid Lynx (10.04).
  That does not mean it won't work in other distributions or on architectures.
  Chances are that it will work for most. That being said, there are no
  promises/guarantees/warranties implied or explicitly defined by me
  when using this script. It was written for personal use and provided as
  a courtesy to those who might encounter a similar roadblock to using Pandora
  in Linux.
 
  If you do encounter bugs, I encourage you to submit them to me so I can get
  them resolved. To submit a bug, send an email to [email protected]
  Best of luck!"
   fi
}
 
 
# Check input to see if we need to print help
if [ "$1" == "" ] || [ "$1" == "--help" ] || [ "$1" == "help" ]; then
  printHelp
  exit $EXIT_STATUS
fi
if [ "$1" == "--help-all" ] || [ "$1" == "help-all" ]; then
  printHelp "ALL"
  exit $EXIT_STATUS
fi
# Save the current window ID so we can bring focus back to it when we're through
ACTIV_WIN=$(xdotool getactivewindow | head -n 1)
# Find the window ID for Pandora and save it
PAND_WIN=$(xdotool search --class "Pandora" | head -n 1)
# Make sure that Pandora is currently open. If not, execute Pandora if the Pandora
# path has been specified by the user. If it has not been specified, perform the
# expected default operation unless this is turned off by setting $DEFAULT_OPS to
# none.
if [ "$PAND_WIN" == "" ]; then
  # Start Pandora if the Pandora path has been specified by the user.
  if [ "$PAND_PATH" != "" ]; then
    # Start Pandora in the background
    $PAND_PATH &
  elif [ "$DEFAULT_OPS" > "$OFF" ]; then
    # Send the default operation based on the input.
    case "$1" in
      "pause")
        xdotool key XF86AudioPlay ;;
      "next")
        xdotool key XF86AudioNext ;;
      "upvol")
        xdotool key XF86AudioRaiseVolume ;;
      "downvol")
        xdotool key XF86AudioLowerVolume ;;
      # Go ahead and include 'maxvol' and 'mute' globally even though they are
      # not currently working in Pandora.
      "maxvol")
        amixer -c 0 sset Master,0 100% ;;
      "mute")
        xdotool key XF86AudioMute ;;
      # Report an error if an invalid operation value was specified.
      *)
        echo "Invalid operation specified."
        printHelp;
        EXIT_STATUS=-1 ;;
    esac
  fi
  exit $EXIT_STATUS
fi
# If the minimize workaround is turned on, temporarily bring the window
# to the front.
if [ $MINIMIZE_WORKAROUND == $ON ]; then
  xdotool windowmap $PAND_WIN
fi
# Bring focus to the window so we can send a keypress to it.
xdotool windowfocus $PAND_WIN
# Send the action to Pandora based on the input.
case "$1" in
  "pause")
    xdotool key space ;;
  "next")
    xdotool key Right ;;
  "like")
    xdotool key plus ;;
  "dislike")
    xdotool key minus ;;
  "upvol")
    xdotool key Up ;;
  "downvol")
    xdotool key Down ;;
# I couldn't get these to work for some odd reason, but feel free to try.
# Let me know if you figure it out because this really made me mad.
# "maxvol")
#   xdotool key "Shift+Up"
# "mute")
#   xdotool key "Shift+Down"
 
# Report an error if an invalid operation value was specified.
  *)
    echo "Invalid operation specified."
    printHelp;
    EXIT_STATUS=-1 ;;
esac
# If the minimize workaround is turned on, unmap the window because we're done.
if [ $MINIMIZE_WORKAROUND == $ON ]; then
  xdotool windowunmap $PAND_WIN
fi
# Restore focus to the originally active window and exit.
xdotool windowfocus $ACTIV_WIN
exit $EXIT_STATUS