opener.ksh: update to 0.5

Cambios:
- Se modifica sintaxis de los códigos de salida para una mejor lectura
- Se modificó nombre de variables para une mejor comprensión de su función
- Se añadió función para verificar existencia del programa en el sistema
- Se cambió el nombre de la función 'open_with_viewer' por 'open_file'
- En la función 'handle_image' se ha reemplazado 'viu' por 'fbv'
- Ahora los archivos de extensión sc, csv, ods xls y xlsx son abiertos por 'sc-im'
- Los archivos de extensión odt y docx ahora son mostrados en texto plano
- El resto de archivos de OpenDocument y de Offices son manejados por LibreOffice

varios/ksh/opener.ksh

@@ -1,45 +1,57 @@
 #!/bin/ksh
 #
-# v0.4 - 20/09/2023
+# v0.5 - 4/11/2023
+# Autor: O. Sánchez <o-sanchez@linuxmail.org> 2023
+#
 # Opener personalizado inspirado en el plugin 'nuke' de nnn.
 #
 # Dependencias:
-#	pdf: zathura (GUI), pdftotext
+#	pdf: zathura (GUI), pdftotext (CLI)
 #	bsdtar: listar archivos comprimidos
-#	audio: mocp (plugin nnn usando moc), mpv, exiftool
+#	audio: mocp (plugin nnn usando moc), mpv, exiftool (CLI)
-#	avi|mkv|mp4: ffplay (GUI), exiftool
+#	avi|mkv|mp4: ffplay (GUI), exiftool (CLI)
-#	log: $EDITOR
+#	log: $EDITOR (CLI)
-#	odt|ods|odp|sxw: odt2txt
+#	csv|ods|xls|xlsx: sc-im (GUI), libreoffice (CLI)
-#	Markdown: glow
+#	odp|sxw|doc|ppt|pptx: libreoffice (CLI)
-#	htm|html|xhtml: w3m
+#	Markdown: glow (CLI)
-#	Imágenes: nsxiv, viu
+#	htm|html|xhtml: w3m (CLI)
-#	text/troff: man
+#	Imágenes: nsxiv (GUI), fbv (CLI)
-#	text/* | */xml: $EDITOR
+#	text/troff: man (CLI)
-# Autor: O. Sánchez <o-sanchez@linuxmail.org> 2023
+#	text/* | */xml: $EDITOR (CLI)
 #
+# Códigos de salida
+NO_ARGS=10
+SUCCESS=15
+FAILED_VIEWER=20
+FAILED_EXTENSION=25
 
 set -ef -o noclobber
 
 if [[ ${#} == 0 ]]; then
 	print "Uso: ${0##*/} <filepath>"
-	exit 1
+	exit $NO_ARGS
 fi
 
 IFS="$(printf '%b_' '\n')"; IFS="${IFS%_}" 
 EDITOR="${VISUAL:-${EDITOR:-vi}}"
-FPATH="$1"
+FILE_PATH="$1"
-FNAME="${1##*/}"
+FILE_NAME="${1##*/}"
-ext="${FNAME##*.}"
+ext="${FILE_NAME##*.}"
 if [[ -n $ext ]]; then
 	typeset -l ext
 	ext="$(print "$ext")"
 fi
 
-function open_with_viewer {
+function check_tool {
+	type "$1" >/dev/null 2>&1
+}
+
+# Función genérica para abrir archivos
+function open_file {
 	typeset viewer="$1"
 	shift
 	if type "$viewer" >/dev/null 2>&1; then
-		"$viewer" "$@" "${FPATH}" >/dev/null 2>&1 &
+		"$viewer" "$@" "${FILE_PATH}" >/dev/null 2>&1 &
 	fi
 }
 
@@ -47,134 +59,122 @@ function open_with_converter {
 	typeset converter="$1"
 	shift
 	if type "$converter" >/dev/null 2>&1; then
-		"$converter" "$@" "${FPATH}" | eval "$PAGER"
+		"$converter" "$@" "${FILE_PATH}" | "$PAGER"
-	fi
-}
-
-function open_with_browser {
-	typeset browser="$1"
-	shift
-	if type "$browser" >/dev/null 2>&1; then
-		"$browser" "$@" "${FPATH}" >/dev/null 2>&1 &
 	fi
 }
 
 function open_with_editor {
-	"$EDITOR" "${FPATH}"
+	"$EDITOR" "${FILE_PATH}"
 }
 
 
 # Funciones para gestionar los archivos
 
 function handle_pdf {
+	check_tool zathura
 	if [[ -n $DISPLAY ]]; then
-		open_with_viewer zathura
+		open_file zathura
 	else
-		pdftotext -l 10 -nopgbrk -q -- "${FPATH}" - | eval "$PAGER"
+		pdftotext -l 10 -nopgbrk -q -- "${FILE_PATH}" - | "$PAGER"
 	fi
-	exit 0
 }
 
 function handle_audio {
-	if type mocp >/dev/null 2>&1 && type mocq >/dev/null 2>&1; then
+	check_tool mocp
-		open_with_viewer mocq opener
+	check_tool mocq
-	elif type mpv >/dev/null 2>&1; then
+	check_tool mpv
-		open_with_viewer mpv
+	check_tool exiftool
-	elif type exiftool >/dev/null 2>&1; then
+	if [[ -n $DISPLAY ]]; then
-		open_with_converter exiftool
+		mocq "${FILE_PATH}" opener || open_file mpv
+	else
+		print && open_with_converter exiftool
 	fi
-	exit 0
 }
 
 function handle_video {
+	check_tool ffplay
+	check_tool exiftool
 	if [[ -n $DISPLAY ]]; then
-		open_with_viewer ffplay -autoexit -fs
+		open_file ffplay -autoexit -fs
 	else
-		open_with_converter exiftool
+		print && open_with_converter exiftool
 	fi
-	exit 0
 }
 
 function handle_image {
+	check_tool nsxiv
+	check_tool fbv
 	if [[ -n $DISPLAY ]]; then
-		open_with_viewer nsxiv -a
+		open_file nsxiv -a
-	elif type viu >/dev/null 2>&1; then
+	else
-		open_with_converter viu -n
+		open_with_converter fbv -f
 	fi
-	exit 0
 }
 
 function handle_html {
+	check_tool w3m
 	if [[ -n $DISPLAY ]]; then
 		open_with_converter w3m -dump
+	else
+		w3m -H -graph -no-cookie "${FILE_PATH}"
 	fi
-	exit 0
 }
 
 case "${ext}"  in
 	## Archive
 	a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
 	rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z|zstd|zip)
-		if type bsdtar >/dev/null 2>&1; then
+		check_tool bsdtar
-			bsdtar --list --file "${FPATH}" | eval "$PAGER"
+		open_with_converter bsdtar --list --file && exit $SUCCESS && exit $FAILED_VIEWER;;
-			exit 0
-		fi
-		exit 1;;
 
 	## PDF
 	pdf)
-		handle_pdf
+		handle_pdf && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 1;;
 
 	## Audio
 	aac|flac|m4a|mid|midi|mpa|mp2|mp3|ogg|wav|webm|wma)
-		handle_audio
+		handle_audio && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 1;;
 
 	## Video
 	avi|mkv|mp4|mov)
-		handle_video
+		handle_video && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 1;;
 
 	## Image
 	bmp|gif|jpeg|jpg|png|tiff|webp|heic|\
 	postscript|jp2|jxl|avif|heif|eps)
-		handle_image
+		handle_image && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 1;;
 
 	## Log files
 	log)
-		open_with_editor
+		open_with_editor && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 0;;
 
-	## OpenDocument
+	## Hojas de cálculo
-	odt|ods|odp|sxw)
+	sc|csv|ods|xls|xlsx)
-		if type odt2txt >/dev/null 2>&1; then
+		check_tool sc-im
-			open_with_converter odt2txt
+		if [[ -n $DISPLAY ]]; then
-			exit 0
+			open_file urxvtc -T "Terminal Sheets" -e sc-im && exit $SUCCESS || exit $FAILED_VIEWER
-		fi
+		else
-		exit 1;;
+			sc-im ${FILE_PATH} && exit $SUCCESS || exit $FAILED_VIEW
+		fi;;
 
-	## Winbugs documents
+	## Documentos de texto
-	 doc|docx|xls|xlsx|ppt|pptx)
+	odt|docx)
-	 if type soffice >/dev/null 2>&1; then
+		check_tool pandoc
-		 soffice --nologo "${@}" >/dev/null 2>&1 &
+		open_with_converter pandoc -t plain && exit $SUCCESS || exit $FAILED_VIEWER;;
-		 exit 0
+
-	 fi
+	## Winbugs documents y OpenDocument
-	 exit 1;;
+	odp|sxw|doc|ppt|pptx)
+		check_tool soffice
+		soffice --nologo "${FILE_PATH}" >/dev/null 2>&1 && exit $SUCCESS || exit $FAILED_VIEWER;;
 
 	## Markdown
 	md)
-		if type glow >/dev/null 2>&1; then
+		check_tool glow
-			open_with_converter glow -sdark
+		open_with_converter glow -sdark && exit $SUCCESS || exit $FAILED_VIEWER;;
-			exit 0
-		fi
-		exit 1;;
 
 	## HTML
 	htm|html|xhtml)
-		handle_html
+		handle_html && exit $SUCCESS || exit $FAILED_VIEWER;;
-		exit 1;;
 esac
 
 function handle_mime {
@@ -182,16 +182,17 @@ function handle_mime {
 	case "${mimetype}" in
 		## Manpages
 		text/troff)
-			man -a "${FPATH}"
+			man -a "${FILE_PATH}" && exit $SUCCESS || exit $FAILED_VIEWER;;
-			exit 0;;
 
 		## Text
-		text/* | */xml)
+		text/* | */xml | */javascript)
-			open_with_editor
+			open_with_editor && exit $SUCCESS || exit $FAILED_VIEWER;;
-			exit 0;;
+
-		esac
+		*)
+			print "Error: No se puede manejar el mimetype '${MIMETYPE}'"
+			exit $FAILED_EXTENSION;;
+	esac
 }
 
-MIMETYPE="$( file -bL --mime-type -- "${FPATH}" )"
+MIMETYPE="$( file -bL --mime-type -- "${FILE_PATH}" )"
 handle_mime "${MIMETYPE}"
-exit 1