353 lines
10 KiB
Bash
Executable File
353 lines
10 KiB
Bash
Executable File
#!/bin/bash
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DEBUG=:
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#DEBUG=echo
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#INDENT_SPACE_SHORT=2
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#INDENT_SPACE=4
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#INDENT_TAB=2
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#rex_nonemptyline_indent='^([ ]{'$INDENT_SPACE_SHORT'}|[ ]{'$INDENT_SPACE'}|[\ ]{'$INDENT_TAB'})[[:graph:]]+' # for $INDENT_SPACE spaces or $INDENT_TAB tabs
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rex_emptyline='^$'
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rex_nonemptyline='^([[:blank:]]*)([[:graph:]]+.*)'
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rex_header='^[[:blank:]]*(#+)[[:blank:]]*(.*)'
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rex_list_start='^([[:blank:]]{0,1})([*+-]{1} +|[[:digit:]]+\.)(.*)'; flag_list=0
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rex_list_level='^([[:blank:]]{2,})([*+-]{1} +|[[:digit:]]+\.)(.*)'
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rex_list="$rex_list_start"
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rex_codeblock='^[[:blank:]]*(```)(.*)'
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rex_codeinline_start='([^`]*)(`{1,2})(.*)'
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rex_codeinline_space='(^[[:blank:]]{4})(.*)'
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rex_codeinline1='([^`]*)(`)(.*)'
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rex_codeinline2='(``)(.*)$' # first part of $line: ${line%"${BASH_REMATCH[0]}"}
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rex_codeinline="$rex_codeinline_start"
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rex_quote='^([[:blank:]]*>)(.*)'; flag_quote=0
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rex_emphasis_start='([^*_]*)([*_]{1,2})([^ ].*)'
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rex_emphasis_end='([^*_]*)([*_]{1,2})(.*)'
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rex_emphasis="$rex_emphasis_start"
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rex_link='([^[]*\[+)([^]]*)(\]+ *[\([])([^]\)]*)([]\)].*)'
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rex_autolink='([^<]*<)([^>]*)(>)(.*)'
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LINE_INDENT=
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LINE_INDENT_LEVEL=0
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PARSE_STATE=0
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PARSE_FIX=0
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FIX_STATE=0
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UNFIX_STATE=0
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# Next parsted line is directed directly to the fixed state
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fix() {
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PARSE_FIX=1
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FIX_STATE=$PARSE_STATE
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[ ! -z "$1" ] && PARSE_STATE=$1
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}
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isfix() { [ $PARSE_FIX -ne 0 ] && [ $FIX_STATE -eq $PARSE_STATE ]; return $?; }
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# Unfix and/or stop parsing for this line
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unfix() {
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UNFIX_STATE=1
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PARSE_FIX=0
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FIX_STATE=0
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}
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isunfix() { [ $UNFIX_STATE -ne 0 ]; return $?; }
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# Decides when to got the next parser stop
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# Called usually like: fall || break
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fall() {
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if isunfix; then
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$DEBUG -n "U]"
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UNFIX_STATE=0
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PARSE_STATE=0
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return 1
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fi
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# Fall to next PARSE_STATE if not fixed
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if [ $PARSE_FIX -eq 0 ]; then
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((PARSE_STATE++))
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return 0
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fi
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if [ $PARSE_STATE -ne $FIX_STATE ]; then
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PARSE_STATE=$FIX_STATE
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return 0
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else
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$DEBUG -n "B]"
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return 1
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fi
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}
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parseline() {
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local line="$1"
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local tocheck="$1"
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local format_prefix=
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local format_suffix=
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[ $PARSE_FIX -eq 0 ] && PARSE_STATE=0
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while : ; do
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$DEBUG -n "$PARSE_STATE]"
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case "$PARSE_STATE" in
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0) ## Empty line ##
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if [[ "$tocheck" =~ $rex_emptyline ]]; then
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# End quote
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[ $flag_quote -ne 0 ] && flag_quote=0 && unfix
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# TODO? Catch rouge formates with empty lines outside codeblocks
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echo -ne "$FO_RESET"
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format_prefix=""
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format_suffix=""
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fi
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fall || break;;
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1) ## Non empty line ##
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if [[ "$tocheck" =~ $rex_nonemptyline ]]; then
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# Detect indent TODO detect levels of indent
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local tab=$(printf '\t')
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case "${BASH_REMATCH[1]}" in
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"${tab}${tab}")
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LINE_INDENT="${BASH_REMATCH[1]}"
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$DEBUG -n "2t]";;
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' ')
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LINE_INDENT="${BASH_REMATCH[1]}"
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$DEBUG -n "4s]";;
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' ')
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LINE_INDENT="${BASH_REMATCH[1]}"
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$DEBUG -n "2s]";;
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*)
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LINE_INDENT=
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esac
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# List ending
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if [ $flag_list -ne 0 ] && [ -z "$LINE_INDENT" ]; then
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rex_list="$rex_list_start"
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flag_list=0
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fi
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fi
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fall || break;;
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2) ## List ##
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if [[ "$tocheck" =~ $rex_list ]]; then
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local indent=
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((flag_list++))
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rex_list="$rex_list_level"
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[ $flag_list -gt 1 ] && indent="$LINE_INDENT" #"${BASH_REMATCH[1]}"
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printf "%s%b%s%b" "$indent" "$FO_LISTITEM" "${BASH_REMATCH[2]}" "$FO_RESET"
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tocheck="${BASH_REMATCH[3]}"
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line="$tocheck"
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elif [[ "$tocheck" =~ $rex_list_start ]]; then
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flag_list=1
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rex_list="$rex_list_start"
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continue
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fi
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fall || break
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;;
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3) ## Header ##
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if [[ "$tocheck" =~ $rex_header ]]; then
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format_prefix="${FO_HEADLINE}"
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format_suffix="${FO_RESET}"
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unfix
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fi
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fall || break;;
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4) ## Quotes
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if [[ "$tocheck" =~ $rex_quote ]] || isfix; then
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# TODO continue parsing quoted string
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fix 0
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flag_quote=1
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format_prefix="${FO_QUOTE}"
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format_suffix="${FO_RESET}"
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break
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else
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fall || break
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fi
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;;
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5) ## Multiline code blocks ##
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if [[ "$tocheck" =~ $rex_codeblock ]]; then
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if isfix; then
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format_suffix="${FO_RESET}"
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unfix
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else
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format_prefix="${FO_CODEBLOCK}"
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fix
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fi
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fi
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fall || break;;
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6) ## Inline code blocks ##
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if [[ "$tocheck" =~ $rex_codeinline ]]; then
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if isfix; then
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local lazym="${tocheck%"${BASH_REMATCH[0]}"}"
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if [ -z "$lazym" ]; then
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printf "%s%b" "${BASH_REMATCH[1]}${BASH_REMATCH[2]}" "${FO_RESET}"
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tocheck="${BASH_REMATCH[3]}"
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else
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printf "%s%b" "${lazym}${BASH_REMATCH[1]}" "${FO_RESET}"
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tocheck="${BASH_REMATCH[2]}"
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fi
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rex_codeinline="$rex_codeinline_start"
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unfix
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else
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if [ '``' == "${BASH_REMATCH[2]}" ]; then
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rex_codeinline="$rex_codeinline2"
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else
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rex_codeinline="$rex_codeinline1"
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fi
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printf "%s%b%s" "${BASH_REMATCH[1]}" "${FO_CODEBLOCK}" "${BASH_REMATCH[2]}"
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tocheck="${BASH_REMATCH[3]}"
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fix
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fi
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line="$tocheck"
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elif [[ "$tocheck" =~ $rex_codeinline_space ]]; then
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# TODO check for list indentation
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format_suffix="$FO_RESET"
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printf "%b%s" "$FO_CODEBLOCK" "${BASH_REMATCH[2]}"
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line=
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break
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elif isfix; then
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# Open inline block at end of line
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fall || break
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fi
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fall;;
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7) ## Inline emphasis start
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if [[ "$tocheck" =~ $rex_emphasis ]]; then
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local fo_emphasis=$FO_EMPHASIS1
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if isfix; then
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printf "%s%b" "${BASH_REMATCH[1]}${BASH_REMATCH[2]}" "${FO_RESET}"
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rex_emphasis="$rex_emphasis_start"
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unfix
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else
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if [ '**' == "${BASH_REMATCH[2]}" ] || [ '__' == "${BASH_REMATCH[2]}" ]; then
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fo_emphasis=$FO_EMPHASIS2
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fi
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printf "%s%b%s" "${BASH_REMATCH[1]}" "${fo_emphasis}" "${BASH_REMATCH[2]}"
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rex_emphasis="$rex_emphasis_end"
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fix
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fi
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tocheck="${BASH_REMATCH[3]}"
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line="$tocheck"
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elif isfix; then
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# Open inline block at end of line
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fall || break
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fi
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fall;;
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8) ## Links within one line ##
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if [[ "$tocheck" =~ $rex_link ]]; then
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#echo -n "m]"
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#echo "${BASH_REMATCH[0]}"
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#echo "${BASH_REMATCH[1]} ! ${BASH_REMATCH[2]} ! ${BASH_REMATCH[3]} ! ${BASH_REMATCH[4]} ! ${BASH_REMATCH[5]}"
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printf "%s%b%s%b%s%b%s%b%s" "${BASH_REMATCH[1]}" "${FO_LINKTEXT}" "${BASH_REMATCH[2]}" "${FO_RESET}" "${BASH_REMATCH[3]}" "${FO_LINKURL}" \
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"${BASH_REMATCH[4]}" "${FO_RESET}"
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tocheck="${BASH_REMATCH[5]}"
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line="$tocheck"
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[ ! -z "$tocheck" ] && fix
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elif isfix; then
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unfix
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fall || break
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fi
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fall;;
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9) ## Auto-links within one line ##
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if [[ "$tocheck" =~ $rex_autolink ]]; then
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#echo -n "m]"
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#echo "${BASH_REMATCH[0]}"
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#echo "${BASH_REMATCH[1]} ! ${BASH_REMATCH[2]} ! ${BASH_REMATCH[3]} ! ${BASH_REMATCH[4]} ! ${BASH_REMATCH[5]}"
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printf "%s%b%s%b%s" "${BASH_REMATCH[1]}" "${FO_LINKURL}" "${BASH_REMATCH[2]}" "${FO_RESET}" "${BASH_REMATCH[3]}"
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tocheck="${BASH_REMATCH[4]}"
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line="$tocheck"
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[ ! -z "$tocheck" ] && fix
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elif isfix; then
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unfix
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fall || break
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fi
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fall;;
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*) ## Regular text
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$DEBUG -n "e]$tocheck"
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break;;
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esac
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done
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printf "%b%s%b" "$format_prefix" "$line" "$format_suffix"
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printf "\n"
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}
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catmd() {
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for arg in "$@"; do
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case "$1" in
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-)
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# treat - as input stream
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break;;
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-*)
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# Ignore args for now
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shift;;
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esac
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done
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local line=
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local myargs=("$@")
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# Use standard input if now files are present
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[ $# -eq 0 ] && myargs[0]="/dev/stdin"
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for file in "${myargs[@]}"; do
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[ "$file" == "-" ] && file="/dev/stdin"
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while IFS='' read -r line; do
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parseline "$line"
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done <"${file}"
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# If last line in a file has no newline, read ends but still populates $line
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[[ $line ]] && parseline "$line"
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echo -en "$FO_RESET"
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done
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}
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## Font formating
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FO_RESET=$(tput sgr0)
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FO_BLINK=$(tput blink) # '\033[5m'
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FO_BOLD=$(tput bold) # '\033[1m'
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FO_SO=$(tput smso) # '\033[7m'
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FO_SO_E=$(tput rmso) # '\033[27m'
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FO_UL=$(tput smul) # '\033[4m'
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FO_UL_E=$(tput smul) # '\033[24m'
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FO_INVIS=$(tput invis) # '\033[8m'
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## Rareley supported
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FO_DIM=$(tput dim)
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FO_REV=$(tput rev)
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## Colorcodes
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##
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## '\033[Xm' - Basic 8 colors
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## X = 30..37 foreground
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## = 40..47 background
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## = Black, Red, Green, Yellow, Blue, Magenta, Cyan, Light gray
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## = 39 = default foreground
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## = 49 = default background
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## - Basic "high contrast" colors
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## X = 90...97 foreground
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## = 100..107 background
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## = Dark grey, Light red, green, yellow, blue, magenta, cyan, white
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## - Format
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## X: 0 = reset, 1 = bold, 2 = dim,
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## 4 = underline, 5 = slow blink,
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## 7 = Reverse, 8 = hidden
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## 20+X: Reset of formating
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## e.g. 21 = reset bold
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## '\033[38;5;Xm' - xterm-256 foreground colors X = 0..255
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## '\033[48;5;Xm' - xterm-256 foreground colors X = 0..255
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COB_BLACK='\033[40m'
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COB_LIGHTGRAY='\033[100m'
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COF_BLACK='\033[0;30m'
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COF_DARKGRAY='\033[1;30m'
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COF_RED='\033[0;31m'
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COF_LIGHTRED='\033[1;31m'
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COF_GREEN='\033[0;32m'
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COF_LIGHTGREEN='\033[1;32m'
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COF_ORANGE='\033[0;33m'
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COF_YELLOW='\033[1;33m'
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COF_BLUE='\033[0;34m'
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COF_LIGHTBLUE='\033[1;34m'
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COF_PURPLE='\033[0;35m'
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COF_LIGHTPURPLE='\033[1;35m'
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COF_CYAN='\033[0;36m'
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COF_LIGHTCYAN='\033[1;36m'
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COF_LIGHTGRAY='\033[0;37m'
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COF_WHITE='\033[1;37m'
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FO_HEADLINE="$FO_BOLD$FO_SO"
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FO_LISTITEM="$COF_ORANGE"
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FO_EMPHASIS1="${COF_LIGHTGRAY}"
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FO_EMPHASIS2="${COF_WHITE}"
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FO_LINKTEXT="${COF_LIGHTGRAY}"
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FO_LINKURL="${FO_UL}"
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FO_CODEBLOCK="$COF_LIGHTGRAY$COB_LIGHTGRAY"
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FO_QUOTE='\033[96;100m'
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catmd "$@"
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