#!/bin/bash
#
# svg_getColors.sh -- This function takes one palette produced by Gimp
# (e.g., syslinux.gpl) as input and outputs a list of colors in the
# specified format. In order for this function to output the color in
# the format specified, it is needed that the fourth column in the gpl
# palette be set in the `rrggbb' format and the appropriate conversion
# be implemented here.
#
# Notice that using both the `--head' and `--tail' options it is
# possible to control how many consecutive items does the list of
# colors is going to have. It is possible to output all colors in the
# list, or a consecutive range of them.
#
# Copyright (C) 2009, 2010, 2011 The CentOS Artwork SIG
#
# 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 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# ----------------------------------------------------------------------
# $Id$
# ----------------------------------------------------------------------
function svg_getColors {
# Define short options.
local ARGSS=''
# Define long options.
local ARGSL='head:,tail:,format:'
# Initialize ARGUMENTS with an empty value and set it as local
# variable to this function scope.
local ARGUMENTS=''
# Initialize both head and tail values to return the first line of
# color information from the palette.
local HEAD=1
local TAIL=1
# Initialize format value used as default when no format option be
# provided.
local FORMAT='rrggbb'
# Initialize list of colors.
local COLORS=''
# Redefine ARGUMENTS variable using current positional parameters.
cli_parseArgumentsReDef "$@"
# Redefine ARGUMENTS variable using getopt output.
cli_parseArguments
# Redefine positional parameters using ARGUMENTS variable.
eval set -- "$ARGUMENTS"
# Look for options passed through positional parameters.
while true;do
case "$1" in
--head )
HEAD=$2
shift 2
;;
--tail )
TAIL=$2
shift 2
;;
--format )
FORMAT=$2
shift 2
;;
-- )
shift 1
break
;;
esac
done
# Define path to gpl palette. This is the first file we use to
# retrive color information from. Only the first file provided
# will be used.
local PALETTE=$(echo $@ | cut -d' ' -f1)
if [[ $PALETTE == '' ]];then
# Define palette path inside the theme's artistic motif.
local MOTIF_PALETTE=$(cli_getRepoTLDir)/Identity/Images/Themes/$(cli_getPathComponent $ACTIONVAL --motif)/Palettes/grub.gpl
# Define palette path inside the theme's design model.
local MODEL_PALETTE=$(cli_getRepoTLDir)/Identity/Models/Themes/${THEME_MODEL_NAME}/Palettes/grub.gpl
# Redefine default background color using palettes provided by
# artistic motif first, and design model later. Assuming none
# of them is present, use The CentOS Project default color
# then.
if [[ -f $MOTIF_PALETTE ]];then
COLORS=$(${RENDER_BACKEND}_getColors $MOTIF_PALETTE --head=1 --tail=1)
elif [[ -f $MODEL_PALETTE ]];then
COLORS=$(${RENDER_BACKEND}_getColors $MODEL_PALETTE --head=1 --tail=1)
else
COLORS='#204c8d'
fi
else
# Retrive the fourth column from GPL palette. The fourth
# column of a GPL palette contains the palette commentary
# field. The palette commentary field can be anything, but for
# the sake of our own convenience we use it to store the color
# value in hexadecimal format (e.g., rrggbb). Notice that you
# can put your comments from the fifth column on using an
# space as field separator.
COLORS=$(sed -r '1,/^#/d' $PALETTE \
| awk '{ printf "%s\n", $4 }' | head -n $HEAD | tail -n $TAIL)
fi
# Implement color formats convertions from rrggbb to other formats
# that you might need to use.
for COLOR in $COLORS;do
case $FORMAT in
rrggbb|* )
if [[ ! $COLOR =~ '^#' ]];then
COLOR="#${COLOR}"
fi
;;
esac
# Output color value.
echo "$COLOR"
done
}