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Add codeblock and escaping
This commit is contained in:
davidovki
parent
1eac038e14
commit
58141a0764
2 changed files with 110 additions and 43 deletions
137
src/md2html.sh
137
src/md2html.sh
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@ -1,9 +1,12 @@
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#!/bin/sh
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ESC_SEQ="ESCAPED!"
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# replace all * with _ for easier processing
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#
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_pre_emph () {
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n"" $line" && continue;; esac
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while [ "$line" != "${line%%\**}" ]; do
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printf "%s_" "${line%%\**}"
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line="${line#*\*}"
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@ -17,6 +20,7 @@ _pre_emph () {
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#
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_post_emph () {
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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# TODO: avoid this problem entirely?
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local wrong="</strong></em>" right="</em></strong>"
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@ -38,6 +42,7 @@ _emph () {
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local lefttag="$2" righttag="$3"
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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next="${line}"
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line=
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rightofbold=
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@ -60,6 +65,7 @@ _emph () {
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_h () {
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local num=$1
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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s=
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n=$num
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@ -82,9 +88,10 @@ _h () {
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# parse paragraphs
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#
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_p () {
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empty=true
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local empty=true
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while IFS= read -r line; do
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case "$line" in
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"$ESC_SEQ"*) printf "%s\n" "$line" && continue;;
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"#"*|">"*|'``'*|'<'*'>'*)
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$empty || {
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printf "</p>\n"
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@ -123,6 +130,7 @@ _p () {
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_a_img () {
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local open="[" mid="](" close=")"
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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next="$line"
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while [ "$next" != "${next#*$close}" ]; do
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before="${next%%$open*}"
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@ -168,89 +176,128 @@ _get_indent () {
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printf "$indent"
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}
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# print a string x times
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#
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# print_x x "string"
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print_x () {
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x=$1; shift
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until [ "$((x=x-1))" -lt "0" ]; do
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printf "$*"
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done
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}
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# parse unordered lists
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#
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_ul () {
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local list=false
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local indent_level=0
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local indent_level=-1
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local to_close=0
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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set -- $line
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case "$1" in
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"-"|"_"|"+")
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indent=$(_get_indent "$line")
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$list || {
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list=true
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[ "$indent_level" -lt "$indent" ] && {
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printf "<ul>\n"
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to_close=$((to_close+1))
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}
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[ "$indent_level" -gt "$indent" ] && {
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printf "</ul>\n"
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to_close=$((to_close-1))
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}
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[ "$indent_level" -lt "$indent" ] \
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&& printf "<ul>\n"
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[ "$indent_level" -gt "$indent" ] \
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&& printf "</ul>\n"
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indent_level=$indent
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printf "<li>%s</li>\n" "${line#*$1 }"
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;;
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*)
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$list && {
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printf "</ul>"
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list=false
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[ $to_close -gt 0 ] && {
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print_x $to_close "</ul>\n"
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to_close=0
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indent_level=-1
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}
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printf "%s\n" "$line"
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;;
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esac
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done
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$list && printf "</ul>\n"
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print_x $to_close "</ul>\n"
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}
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# parse ordered lists
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#
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_ol () {
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local list=false
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local indent_level=0
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local indent_level=-1
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local to_close=0
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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set -- $line
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case "$1" in
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*.|*\))
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indent=$(_get_indent "$line")
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$list || {
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list=true
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[ "$indent_level" -lt "$indent" ] && {
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printf "<ol>\n"
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to_close=$((to_close+1))
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}
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[ "$indent_level" -gt "$indent" ] && {
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printf "</ol>\n"
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to_close=$((to_close-1))
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}
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[ "$indent_level" -lt "$indent" ] \
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&& printf "<ol>\n"
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[ "$indent_level" -gt "$indent" ] \
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&& printf "</ol>\n"
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indent_level=$indent
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printf "<li>%s</li>\n" "${line#*$1 }"
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;;
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*)
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$list && {
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printf "</ol>"
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list=false
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[ $to_close -gt 0 ] && {
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print_x $to_close "</ol>\n"
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to_close=0
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indent_level=-1
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}
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printf "%s\n" "$line"
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;;
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esac
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done
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$list && printf "</ol>\n"
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print_x $to_close "</ol>\n"
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}
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# parse mutliline codeblocks
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# parse multiline codeblocks
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#
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#_code () {
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#}
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_code () {
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local codeblock=false content=true
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while IFS= read -r line; do
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case "$line" in
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" "*)
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$codeblock &&
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printf "%s\n" "$ESC_SEQ${line# }" ||
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printf "%s\n" "$line"
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$codeblock || $content || {
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printf "<pre><code>\n"
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codeblock=true
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printf "%s\n" "$ESC_SEQ${line# }"
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}
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;;
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*)
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$codeblock && {
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printf "</code></pre>\n"
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codeblock=false
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}
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printf "%s\n" "$line"
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;;
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esac
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case "$line" in
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"") content=false ;;
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*) content=true ;;
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esac
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done
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}
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# parse quotes
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#
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_blockquote () {
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local level=0
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local indent_level=0
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while IFS= read -r line; do
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case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac
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set - $line
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case "$1" in
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">"*)
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@ -267,34 +314,43 @@ _blockquote () {
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line="${line#?}"
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done
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[ "$indent" -gt "$level" ] &&
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printf "<blockquote>\n"
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[ "$indent" -lt "$level" ] &&
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printf "</blockquote>\n"
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level="$indent"
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print_x $((indent-indent_level)) "<blockquote>\n"
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print_x $((indent_level-indent)) "</blockquote>\n"
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indent_level=$indent
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;;
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esac
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printf "%s\n" "$line"
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done
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print_x $((indent_level)) "</blockquote>\n"
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}
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_post_escape () {
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while IFS= read -r line; do
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case "$line" in
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"$ESC_SEQ"*)
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printf "%s\n" "${line#$ESC_SEQ}"
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;;
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*)
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printf "%s\n" "$line"
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;;
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esac
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done
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[ "$indent" -lt "$level" ] &&
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printf "</blockquote>\n"
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}
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_html () {
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printf "<!DOCTYPE html>\n"
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cat
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while IFS= read -r line; do
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printf "%s\n" "$line"
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done
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}
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# convert the markdown from stdin into html
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#
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md2html () {
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# the order of these somewhat matters
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_pre_emph \
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| _code \
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| _blockquote \
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| _ul \
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| _ol \
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@ -310,6 +366,7 @@ md2html () {
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| _h 3 \
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| _h 2 \
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| _h 1 \
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| _post_escape \
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| _html
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}
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14
src/test.md
14
src/test.md
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@ -18,7 +18,6 @@ ok that was a quote
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>
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> and also there is another quote;
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>> Hi i am a quote
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>
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haha
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@ -28,6 +27,17 @@ haha
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- please dont
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- break
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ok
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int main() {
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printf("hello %s\n", "world");
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}
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- list
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- sublist
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- subsublist
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- subsubsublist
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* star list
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* this is a star
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@ -40,4 +50,4 @@ haha
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3. lOL
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ok that worked?
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> ok that worked?
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