Add shell script to toggle visibility of Linux applications.

bin/linux-toggle-app

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+# Borrowed from:
+# - http://bytefreaks.net/gnulinux/bash/howto-make-terminator-terminal-act-like-guake-terminal-in-fedora-20ubuntu-14-10
+
+# The purpose of this script is to allow the user to toggle the visibility of
+# (almost) any window.  Please note it will work on the first match, so if there
+# are multiple instances of an application it would be a random window of them
+# the one to be affected.
+
+# Only checks dependencies on request to keep toggling behavior as fast as
+# possible.
+if [ "$1" == "--install-deps" ]; then
+  # Checking that all dependencies are met, since we cannot proceed without
+  # them.
+  DEPENDENCIES=("xdotool" "wmctrl")
+  MANAGERS=("yum" "apt-get")
+
+  echo "Checking dependencies:"
+  for DEPENDENCY in ${DEPENDENCIES[@]}; do
+    if hash $DEPENDENCY 2>/dev/null; then
+      echo "- $DEPENDENCY: ok"
+    else
+      echo "- $DEPENDENCY: not found"
+      for MANAGER in ${MANAGERS[@]}; do
+        if hash $MANAGER 2>/dev/null; then
+          echo -n "$DEPENDENCY is missing, would you like to try and install " \
+               "it via $MANAGER now? [Y/N] (default is Y): "
+          read ANSWER
+          if [[ "$ANSWER" == "Y" || "$ANSWER" == "y" || "$ANSWER" == "" ]]; then
+            sudo "$MANAGER" install "$DEPENDENCY"
+          else
+            echo "Terminating"
+            exit -1
+          fi
+        fi
+      done
+    fi
+  done
+
+  exit 0
+fi
+
+APPLICATION="$1"
+
+# Checking if the application name provided by the user exists
+if ! hash $APPLICATION 2>/dev/null; then
+  echo -e "$APPLICATION does not seem to be a valid executable\nTerminating"
+  exit -2
+fi
+
+# Checking if the application is running. We are using pgrep as various
+# application are python scripts and we will not be able to find them using
+# pidof. pgrep will look through the currently running processes and list the
+# process IDs of all the processes that are called $APPLICATION.
+PID=$(pgrep $APPLICATION | head -n 1)
+
+# If the application is not running, we will try to launch it.
+if [ -z $PID ]; then
+  echo "$APPLICATION not running, launching it.."
+  $APPLICATION
+else
+  # Since the application has a live instance, we can proceed with the rest of
+  # the code.  We will get the PID of the application that is currently focused,
+  # if it is not the application we passed as parameter we will change the focus
+  # to that. In the other case, we will minimize the application.
+  echo -n "$APPLICATION instance found - "
+  FOCUSED=$(xdotool getactivewindow getwindowpid)
+  if [[ $PID == $FOCUSED ]]; then
+    echo "It was focused so we are minimizing it"
+    # We minimize the active window which we know in this case that it is the
+    # application we passed as parameter.
+    xdotool getactivewindow windowminimize
+  else
+    echo "We are setting the focus on it"
+    # We set the focus to the application we passed as parameter. If it is
+    # minimized it will be raised as well.
+    wmctrl -x -R $APPLICATION
+  fi
+fi