[juneau-lug] webify jpeg script

I have a small script I use to resize jpeg images and put them into html 
wrappers with comments.  I am in tweak mode, so version 0.4 of the script 
will feature a big warning telling the user that jpeg images in the current 
directory will be permanently resized (I chattr +i all of my images, but 
other users might be upset when they reduce all of their photos to 800x600), 
allow user entered comments for the index page (currently I just edit it with 
vi after running the script) and user entered alternate text for images 
(currently it just uses the image name as alternate text).  

I thought it would be a good idea to also make the script a bit more portable.  
As I am a KDE fanboy, it is set up for KDE only.  Since my bandwidth isn't so 
hot, I don't want to pull Gnome down for testing.

So questions for the group:

1) How would one determine whether you are running KDE or Gnome from a bash 
script running in an xterm?  Since a user could have both installed, checking 
for files wouldn't work, and you can start KDE from gdm and Gnome from kdm, 
so checking which is running won't work either.  I suppose checking for a 
running instance of kdesktop or kdeinit would work for KDE, as long as the 
user only has one session open.  But I can have multiple sessions open with 
different GUIs and I only want to know which environment the script is being 
run in.

2) What is a Gnome equivalent to this line:

kstart --type Tool display ${newimage} 2> /dev/null

kstart is part of KDE.  /usr/bin/display is part of imagemagick.  What kstart 
is doing is pulling up display in tool mode, so that it does not grab focus 
from the xterm window.   The user is expected to enter comments about the 
photos, and I didn't like having to click on the xterm when the script pulled 
up a viewer.  Output from display goes to /dev/null to keep it from echoing 
stuff to the xterm the script is running in. The user should just need to 
type a comment, hit enter, and the photo will change to the next one while 
the script waits for the user to input text for the new photo.  Very quick 
and easy. 

Does Gnome have a similar tool or syntax that can open display without giving 
it focus with the mouse and keyboard?  (Please test any possible solutions -- 
the KDE manpages all refer to a "--nograb" option for starting apps in KDE 
that allegedly prevents the newly opened app from grabbing focus.  But it 
never seemed to work that way.  I always needed to click back onto the xterm 
window, taking my hands off of the keyboard.)

Anyhow, here is the current 0.3 version.  Yes, I know it isn't the most 
elegant solution.  I tend to brute force my scripts.

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beware of lines wrapping if you copy & paste.  Each line begins with 
whitespace.
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 #!/bin/bash
 #################################################
 # webify.sh 0.3
 # simply puts an html wrapper around jpegs that
 # will be resized to 800x600 (or 600x800) with
 # mogrify and displayed with display.
 # Depends on ImageMagick and KDE.
 # this version does not link to external websites
 # but could be modified to do so.
 # James Zuelow // Juneau Linux User's Group
 # Camp Mike Spann, Afghanistan August 31 2007
 # v0.3 September 12 2007
 ################################################
 nojpeg(){
        echo "     No jpegs found!"
        exit
 }
 echo "     Ensure your photos are jpegs, and that their orientation is 
correct."
 echo "     Your photos will be ordered however the ls command orders them."
 echo "     To escape the script, just hit enter when prompted for a base 
image name."
 echo "     ---"
 echo "Checking for jpeg files.  Script will exit if none found."
 ls . | grep -i .jpg &> /dev/null || nojpeg
 (( i = 101 ))
 (( j = 101 ))
 (( k = 0 ))
 (( l = 0 ))
 echo -n "Enter base image name: "
 read basename
 if [ -z "${basename}" ]
 then
        echo "Quitting"
        exit
 fi
 for oldimage in `ls . | grep -i .jpg`
 do
        mv ${oldimage} ${basename}-${i}.jpg
        (( i++ ))
 done
 (( m = i - 1 ))
 echo -n "     Sizing images:"
 for sizetarget in `ls *.jpg`
 do
        mogrify -resize @480000 ${sizetarget}
        echo -n "."
 done
 echo -e "\nDone resizing."
 echo "<HTML><HEAD>" > index.html
 echo "<META HTTP-EQUIV=\"CONTENT-TYPE\" CONTENT=\"text/html\">" >> index.html
 echo "<TITLE>${basename} index</TITLE>" >> index.html
 echo "<!webify.sh 0.3 James Zuelow // Juneau Linux Users Group Aug-Sep 07 // 
MeS Afghanistan></HEAD>" >> index.html
 echo "<BODY bgcolor=\"#000000\" text=\"#ffff99\">" >> index.html
 echo "<CENTER>" >> index.html
 echo "<A HREF=\"${basename}-101.html\">Start Show</A>" >> index.html
 echo "</CENTER></BODY></HTML>" >> index.html
 for newimage in `ls *.jpg`
 do
        prv=""
        nxt=""
        echo "<HTML><HEAD>" > ${basename}-${j}.html
        echo "<META HTTP-EQUIV=\"CONTENT-TYPE\" CONTENT=\"text/html\">" >> 
${basename}-${j}.html
        echo "<TITLE>${basename} ${j}</TITLE>" >> ${basename}-${j}.html
        echo "<!webify.sh 0.3 James Zuelow // Juneau Linux Users Group Aug-Sep 
07 // MeS Afghanistan></HEAD>" >> ${basename}-${j}.html
        echo "<BODY bgcolor=\"#000000\" text=\"#ffff99\">" >> 
${basename}-${j}.html
        echo "<CENTER>" >> ${basename}-${j}.html
        if [ $j -ne 101 ]
        then
                (( k = j - 1 ))
                prv="<A HREF=\"${basename}-${k}.html\">Previous</A>"
        fi
        if [ $j -lt $m ]
        then
                (( l = j + 1 ))
                nxt="<A HREF=\"${basename}-${l}.html\">Next</A>"
        fi
        echo "<P>${prv} ${nxt}</P>" >> ${basename}-${j}.html
        echo "<IMG SRC=\"${newimage}\" ALT=\"${newimage}\">" >> 
${basename}-${j}.html
        kstart --type Tool display ${newimage} 2> /dev/null
        echo -n "Enter comment for ${newimage}: "
        read comment
        echo "<P>${comment}</P>" >> ${basename}-${j}.html
        echo "<BR><BR><BR><HR WIDTH=\"50%\"><CITE>James Zuelow 2007</CITE><HR 
WIDTH=\"25%\">" >> ${basename}-${j}.html
        echo "</BODY></HTML>" >> ${basename}-${j}.html
        killall display &> /dev/null
        (( j++ ))
 done
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