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prefon: new script to preview fonts
author
yemou
date
(Jul 14, 2021, 1:08 AM UTC)
commit
f0dd740d
f0dd740da74bd21b19393e15e7526e37279df21d
parent
a1b488fd
a1b488fdc20b3ecd5c0c8c7c2c070982efec7c09
+132
+132
scritps/prefon
+132
scritps/prefon
···
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#!/bin/sh
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# Script to preview fonts
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usage() {
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printf '%b\n' "${0##*/} [-F FILE | -S | -t STRING] [OPTIONS]" \
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"actions:" \
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"\t-F FILE - read from file" \
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"\t-S - read from stdin" \
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"\t-t STRING - use a string" \
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"\noptions:" \
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"\t-b SIZE - border size" \
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"\t-c COLORS - set the color of the text and background" \
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"\t-f FONT - which font to preview" \
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"\t-h - display this message" \
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"\t-i - do not generate an inverse image" \
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"\t-o FILE - output file for the generated image" \
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"\t-s SIZE - size of the font" \
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"\ndefault values:" \
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"These values can be set before execution to change default values" \
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"\tPREFON_ACTION=text (file, stdin, or text)" \
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"\tPREFON_BORDER_SIZE=16" \
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"\tPREFON_COLORS=\"000000,ffffff\"" \
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"\tPREFON_FONT=\"monospace\"" \
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"\tPREFON_OUTPUT=\"/tmp/prefon.png\"" \
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"\tPREFON_SIZE=16" \
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"\tPREFON_TEXT=\"The quick brown fox jumps\\\n over the lazy dog}\"" \
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"\tPREFON_INVERSE=vertical (horizontal, vertical, none)"
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}
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info() {
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case $1 in
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i ) prefix=INFO ;;
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w ) prefix=WARNING ;;
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e ) prefix=ERROR ;;
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* ) printf '%s\n' "sus!" 1>&2; exit 1 ;;
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esac
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shift
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printf "${0##*/}: $prefix: %b\n" "$*" 1>&2
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}
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# Default values
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PREFON_ACTION=${PREFON_ACTION:-text}
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PREFON_BORDER_SIZE=${PREFON_BORDER_SIZE:-16}
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PREFON_COLORS=${PREFON_COLORS:-000000,ffffff}
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PREFON_FONT="${PREFON_FONT:-monospace}"
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PREFON_OUTPUT="${PREFON_OUTPUT:-/tmp/prefon.png}"
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PREFON_SIZE=${PREFON_SIZE:-16}
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PREFON_TEXT="${PREFON_TEXT:-The quick brown fox jumps\n over the lazy dog}"
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PREFON_INVERSE=${PREFON_WITHOUT_INVERSE:-vertical}
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# Handle arguments
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while [ "$*" ]
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do
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case $1 in
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- ) shift; continue ;;
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-- ) shift; break ;;
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-* ) flag=${1#-}; shift ;;
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* ) shift; continue ;;
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esac
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while [ "$flag" ]
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do
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arg=${flag%${flag#?}}
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case $arg in
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F ) PREFON_ACTION="file"; PREFON_FILE=$1; shift ;;
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S ) PREFON_ACTION=stdin; PREFON_FILE=/dev/stdin ;;
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b ) PREFON_BORDER_SIZE=$1; shift ;;
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c ) PREFON_COLORS=$1; shift ;;
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f ) PREFON_FONT=$1; shift ;;
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h ) usage; exit 0 ;;
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i ) PREFON_INVERSE=$1; shift ;;
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o ) PREFON_OUTPUT=$1; shift ;;
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s ) PREFON_SIZE=$1; shift ;;
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t ) PREFON_ACTION=text; PREFON_TEXT=$1; shift ;;
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* ) printf '%s\n' "${0##*/}: -$arg: invalid argument" 1>&2; usage 1>&2; exit 1 ;;
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esac
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flag=${flag#?}
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done
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done
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generate_image() {
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_gen_img() {
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convert -background "#$2" -bordercolor "#$2" -border "$PREFON_BORDER_SIZE" \
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pango:"<span foreground=\"#$1\" font_desc=\"$PREFON_FONT $PREFON_SIZE\">$4</span>" "$3"
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}
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fgcolor=${PREFON_COLORS%,*}
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bgcolor=${PREFON_COLORS#*,}
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_gen_img "$fgcolor" "$bgcolor" "$PREFON_OUTPUT" "$1" || { info e failed to generate image; exit 1; }
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[ "$PREFON_INVERSE" != "none" ] && {
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inverse="${PREFON_OUTPUT%.*}"
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inverse="${inverse}-inverse.${PREFON_OUTPUT##*.}"
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_gen_img "$bgcolor" "$fgcolor" "$inverse" "$1" || { info e failed to generate image; exit 1; }
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case $PREFON_INVERSE in
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horizontal ) convert "$PREFON_OUTPUT" "$inverse" +append "$PREFON_OUTPUT" \
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|| { info e failed to generate image; exit 1; } ;;
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vertical ) convert "$PREFON_OUTPUT" "$inverse" -append "$PREFON_OUTPUT" \
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|| { info e failed to generate image; exit 1; } ;;
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* ) info e "${PREFON_INVERSE}: is not a valid value for PREFON_INVERSE"; exit 1 ;;
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esac
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rm "$inverse" || info w failed to remove temporary file: "${inverse}"
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}
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printf '%s\n' "$PREFON_OUTPUT"
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}
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read_input() {
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_output_file() {
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while IFS= read -r line
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do
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printf '%s\n' "$line"
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done < "$PREFON_FILE"
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}
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input="$(_output_file)"
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generate_image "$input"
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}
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case $PREFON_ACTION in
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file ) [ -e "$PREFON_FILE" ] || { info e "'$PREFON_FILE' does not exist"; exit 1; }
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wa ;;
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stdin ) [ -e /dev/stdin ] || { info e "/dev/stdin does not exist"; exit 1; }
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wa ;;
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text ) [ "$PREFON_TEXT" ] || { info e "string not provided"; exit 1; }
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generate_image "$PREFON_TEXT" ;;
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* ) info e invalid action: $PREFON_ACTION; exit 1 ;;
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esac