#!/bin/bash
#
# easyGG - an automatic gallery generator
#
# Copyright (c) 2018 Stephan Uhlmann <su@su2.info>
#
# /************************************************************************
# * This program is free software: you can redistribute it and/or modify *
# * it under the terms of the GNU General Public License as published by *
# * the Free Software Foundation, either version 3 of the License, or *
# * (at your option) any later version. *
# * *
# * See http://www.gnu.org/licenses/gpl.txt for the full text of the GPL. *
# ************************************************************************/
#
#### Default parameters
# Tools needed
# specify full path when not in $PATH
JHEAD="jhead"
CONVERT="convert"
MKDIR="mkdir"
FIND="find"
GREP="grep"
SED="sed"
BASENAME="basename"
DU="du"
SORT="sort"
# title of each page
# can be changed with --title option
TITLE="$(${BASENAME} "$(pwd)")"
# html which will be added on top of the page
# can be changed with --headerhtml option
HEADERHTML=""
# working directory
# all files will be put in a subdirectory of this name
# can be changed with --subdir option
SUBDIR="gallery"
# 0=debug (lots of info for debugging)
# 1=info (default, normal progress info)
# 2=error (program can continue)
# 3=critical (program can't continue)
# can be changed with --verbose and --qiet option
VERBOSELEVEL=1
# max dimension of thumbnail image
# no side (width/height) will be longer than this. but image won't be enlarged
# if it is smaller. aspect ratio will be kept.
# can be changed with the --thumb-dimension option
THUMB_DIM="160"
# max dimension of full image
# no side (width/height) will be longer than this. but image won't be enlarged
# if it is smaller. aspect ratio will be kept.
# can be changed with the --full-dimension option
FULL_DIM="800"
#### Functions
# $1 file
htmlclear()
{
msg 0 "Creating HTML file for ${1}."
echo -n > "${SUBDIR}/${1}.html" || msg 3 "Error creating HTML file. Stop."
}
# $1 string, $2 file
htmlprint()
{
echo -e -n "${1}" >> "${SUBDIR}/${2}.html" || msg 3 "Error writing HTML file. Stop."
}
# $1 title, $2 file
htmlheader()
{
msg 0 "Writing HTML header for ${2}."
htmlprint "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\\n" "${2}"
htmlprint "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\">\\n" "${2}"
htmlprint "<head>\\n" "${2}"
htmlprint "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/>\\n" "${2}"
htmlprint "<meta http-equiv=\"Generator\" content=\"easyGG\"/>\\n" "${2}"
htmlprint "<title>${1}</title>\\n" "${2}"
htmlprint "<style type=\"text/css\">\\n" "${2}"
htmlprint "<!--\\n" "${2}"
htmlprint " body { color: #000000; background-color: #dddddd; font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif; font-size: 15px; }\\n" "${2}"
htmlprint " a:link { color: #000000; text-decoration: none; }\\n" "${2}"
htmlprint " a:active { color: #000000; text-decoration: none; }\\n" "${2}"
htmlprint " a:visited { color: #222222; text-decoration: none; }\\n" "${2}"
htmlprint " a:hover { color: #000000; background-color: #bbbbbb; text-decoration: none; }\\n" "${2}"
htmlprint " img { border: 1px solid black; }\\n" "${2}"
htmlprint " span.hide { visibility: hidden; }\\n" "${2}"
htmlprint " div.main { display: table; margin: 0 auto 0 auto; text-align: center; }\\n" "${2}"
htmlprint " div.footer { display: block; clear: left; padding-top: 96px; color: #444444; font-size: small; }\\n" "${2}"
htmlprint "-->\\n" "${2}"
htmlprint "</style>\\n" "${2}"
htmlprint "</head>\\n" "${2}"
htmlprint "<body>\\n" "${2}"
htmlprint "${HEADERHTML}\\n" "${2}"
}
# $1 file
htmlfooter()
{
msg 0 "Writing HTML footer for ${1}."
htmlprint "<div class=\"footer\">\\n" "${1}"
htmlprint "</div>\\n" "${1}"
htmlprint "</body>\\n" "${1}"
htmlprint "</html>\\n" "${1}"
}
# $1 severity, $2 message
# |
# `-> 0=debug,1=info,2=error,3=critical
msg()
{
if [ "${1}" -ge "${VERBOSELEVEL}" ]; then echo "${2}"; fi
if [ "${1}" -ge 3 ]; then exit 1; fi
}
# $1 tool
toolcheck()
{
X=$(type -p "${1}")
if test "${X}" && test -x "${X}";
then return 0
else return 1
fi
}
usage()
{
cat << EOF
Usage: easygg [OPTIONS]
This program can be called without any options. It will generate a
subdirectory with a ready to use gallery.
You can override some default options though.
-t, --title change title of gallery
(default is current directory name)
-s, --subdir subdirectory in which the gallery files are written
(default is "${SUBDIR}")
-td, --thumb-dimension
max dimension of thumbnail image
(in pixel, default is ${THUMB_DIM})
no side (width/height) will be longer than this. but
image won't be enlarged if it is smaller.
-fd, --full-dimension
max dimension of full image
(in pixel, default is ${FULL_DIM})
no side (width/height) will be longer than this. but
image won't be enlarged if it is smaller.
-H, --header HTML code to be inserted on top of each page
(default: none)
-v, --verbose show more debugging info
-q, --quiet show only errors
-h, --help shows this information
EOF
}
#### Main
# command line arguments
while [ "${#}" -gt 0 ] ;
do
case "${1}" in
--title|-t)
TITLE="${2}"
shift
;;
--subdir|-s)
SUBDIR="${2}"
shift
;;
--thumb-dimension|-td)
THUMB_DIM="${2}"
shift
;;
--full-dimension|-fd)
FULL_DIM="${2}"
shift
;;
--header|-H)
HEADERHTML="${2}"
shift
;;
--verbose|-v)
VERBOSELEVEL=0
;;
--quiet|-q)
VERBOSELEVEL=2
;;
--help|-help|-h)
usage
exit 0
;;
*)
msg 3 "Unknown option: ${1}"
;;
esac
shift
done
# All tools there?
toolcheck ${JHEAD} || msg 3 "jhead not found."
toolcheck ${CONVERT} || msg 3 "convert not found."
toolcheck ${MKDIR} || msg 3 "mkdir not found."
toolcheck ${FIND} || msg 3 "find not found."
toolcheck ${GREP} || msg 3 "grep not found."
toolcheck ${SED} || msg 3 "sed not found."
toolcheck ${BASENAME} || msg 3 "basename not found."
toolcheck ${DU} || msg 3 "du not found."
toolcheck ${SORT} || msg 3 "sort not found."
# find files and map them into an array
mapfile -t FILES < <(${FIND} . -maxdepth 1 \( -iregex ".*\\.jpe?g$" -o -iregex ".*\\.png$" \) -type f -print | ${SORT} -f)
if [ ${#FILES[@]} -gt 0 ];
then
msg 1 "Found ${#FILES[@]} image files."
else
msg 3 "No image files found. Stop."
fi
${MKDIR} -p "${SUBDIR}" || msg 3 "Error creating subdirectory. Stop."
htmlclear index
htmlheader "${TITLE}" index
htmlprint "<h1>${TITLE}</h1>\\n" index
htmlprint "<div class=\"main\">\\n" index
htmlprint "<table cellspacing=\"5\" cellpadding=\"5\">\\n" index
htmlprint "<tr>\\n" index
# need to precompute filenames because they are referenced back/ahead in the prev/next links
for (( i=0; i < ${#FILES[@]}; i++ )); do FILENAMES[${i}]=$(${BASENAME} "${FILES[${i}]}" | ${SED} s/\ /_/g); done
for (( i=0; i < ${#FILES[@]}; i++ ))
do
FILE="${FILES[${i}]}"
FILENAME="${FILENAMES[${i}]}"
msg 1 "$((i+1))/${#FILES[@]} ${FILE}"
htmlprint "<td align=\"center\" valign=\"bottom\">" index
CONVERT_OPTIONS=(-strip -quality 90)
# look in exif if image needs rotation
ORIENTATION=$(${JHEAD} "${FILE}" | ${GREP} "Orientation")
if [ "${ORIENTATION}" ]; then
X=$(echo "${ORIENTATION}" | ${SED} s/.*rotate\ //)
CONVERT_OPTIONS+=( -rotate "${X}" )
fi
${CONVERT} "${CONVERT_OPTIONS[@]}" -scale "${THUMB_DIM}x${THUMB_DIM} >" "${FILE}" "${SUBDIR}/thumb_${FILENAME}" || msg 3 "Error converting thumbnail."
NEWDIM_THUMB_X=$(${JHEAD} "${SUBDIR}/thumb_${FILENAME}" | ${GREP} "Resolution" | ${SED} s/\ x.*$// | ${SED} s/^.*:\ //)
NEWDIM_THUMB_Y=$(${JHEAD} "${SUBDIR}/thumb_${FILENAME}" | ${GREP} "Resolution" | ${SED} s/^.*x\ //)
msg 0 "scaled thumb image to ${NEWDIM_THUMB_X} x ${NEWDIM_THUMB_Y}"
${CONVERT} "${CONVERT_OPTIONS[@]}" -scale "${FULL_DIM}x${FULL_DIM} >" "${FILE}" "${SUBDIR}/pic_${FILENAME}" || msg 3 "Error converting full pic."
NEWDIM_FULL_X=$(${JHEAD} "${SUBDIR}/pic_${FILENAME}" | ${GREP} "Resolution" | ${SED} s/\ x.*$// | ${SED} s/^.*:\ //)
NEWDIM_FULL_Y=$(${JHEAD} "${SUBDIR}/pic_${FILENAME}" | ${GREP} "Resolution" | ${SED} s/^.*x\ //)
msg 0 "scaled full image to ${NEWDIM_FULL_X} x ${NEWDIM_FULL_Y}"
htmlprint "<a href=\"page_${FILENAME}.html\"><img src=\"thumb_${FILENAME}\" width=\"${NEWDIM_THUMB_X}\" height=\"${NEWDIM_THUMB_Y}\" alt=\"${FILENAME}\"/></a><br/>" index
htmlprint "${FILENAME}" index
# generate sub-pages
htmlclear "page_${FILENAME}"
htmlheader "${TITLE}" "page_${FILENAME}"
htmlprint "<h2>${TITLE}</h2>\\n" "page_${FILENAME}"
htmlprint "<div class=\"main\">\\n" "page_${FILENAME}"
# navigation
X="<— [prev] "
if [ ${i} -gt 0 ];
then
htmlprint "<a href=\"page_${FILENAMES[$((i-1))]}.html\">${X}</a>" "page_${FILENAME}"
else
htmlprint "<span class=\"hide\">${X}</span>" "page_${FILENAME}"
fi
htmlprint "<a href=\"index.html\"> [index] </a>" "page_${FILENAME}"
X=" [next] —>"
if [ $((i+1)) -lt ${#FILES[@]} ];
then
htmlprint "<a href=\"page_${FILENAMES[$((i+1))]}.html\">${X}</a>\\n" "page_${FILENAME}"
else
htmlprint "<span class=\"hide\">${X}</span>\\n" "page_${FILENAME}"
fi
# table with image and info
INFOS_SIZE="$(${DU} -k "${SUBDIR}/pic_${FILENAME}" | ${GREP} -o '^[0-9]*')"
INFOS_DATETIME="$(${JHEAD} "${FILE}" | ${GREP} -e 'Date/Time')"
INFOS_SETTINGS="$(${JHEAD} "${FILE}" | ${GREP} -e 'Flash' -e 'Focal length' -e 'Exposure time' -e 'Aperture' | ${SED} 's/$/\<br\/\>/g')"
htmlprint "<table>\\n" "page_${FILENAME}"
htmlprint "<tr><td colspan=\"2\">\\n" "page_${FILENAME}"
htmlprint "<img src=\"pic_${FILENAME}\" width=\"${NEWDIM_FULL_X}\" height=\"${NEWDIM_FULL_Y}\" alt=\"${FILENAME}\"/>\\n" "page_${FILENAME}"
htmlprint "</td></tr>\\n" "page_${FILENAME}"
htmlprint "<tr>\\n<td align=\"left\">" "page_${FILENAME}"
htmlprint "<small>File : ${FILENAME} ($((i+1))/${#FILES[@]})<br/>Size : ${INFOS_SIZE} KB<br/>${INFOS_DATETIME}</small>" "page_${FILENAME}"
htmlprint "</td>\\n<td align=\"left\">" "page_${FILENAME}"
htmlprint "<small>${INFOS_SETTINGS}</small>" "page_${FILENAME}"
htmlprint "</td>\\n</tr>\\n</table>\\n" "page_${FILENAME}"
htmlprint "</div>\\n" "page_${FILENAME}"
htmlfooter "page_${FILENAME}"
htmlprint "</td>\\n" index
if [ $((i%5)) -eq 4 ];
then
if [ $((i+1)) -ne ${#FILES[@]} ];
then
htmlprint "</tr>\\n<tr>\\n" index
fi
fi
done
htmlprint "</tr>\\n" index
htmlprint "</table>\\n" index
htmlprint "</div>\\n" index
htmlfooter index
msg 1 "Finished."