diff options
Diffstat (limited to 'src/md2html.sh')
| -rwxr-xr-x | src/md2html.sh | 94 |
1 files changed, 72 insertions, 22 deletions
diff --git a/src/md2html.sh b/src/md2html.sh index 776527b..1edc6a1 100755 --- a/src/md2html.sh +++ b/src/md2html.sh @@ -2,6 +2,29 @@ ESC_SEQ='\0' +# remove traling whitespace from empty lines +# +_pre_strip () { + while IFS= read -r line; do + set -- $line + [ "$*" ] && { + local l c + l="$line" + line= + while [ "$l" != "${l#?}" ]; do + c="${l%*"${l#?}"}" + case "$c" in + " ") line="$line ";; + *) line="$line$c" ;; + esac + l="${l#?}" + done + + printf "%s\n" "$line" + } || printf "\n" + done +} + # replace all * with _ for easier processing # _pre_emph () { @@ -107,8 +130,8 @@ _p () { ;; *) $empty && - printf "<p>\n%s\n " "$line" || - printf "%s\n " "$line" + printf "<p>\n%s\n" "$line" || + printf "%s\n" "$line" empty=false ;; esac @@ -133,6 +156,10 @@ _a_img () { case "$line" in "$ESC_SEQ"*) printf "%s\n" "$line" && continue;; esac next="$line" while [ "$next" != "${next#*$close}" ]; do + case "$next" in + *"["*"]("*")"*);; + *) break; + esac before="${next%%$open*}" text=${next#*$open} text=${text%%$mid*} url=${next#*$mid} url=${url%%$close*} @@ -144,12 +171,12 @@ _a_img () { || title= case "$before" in - *!) h="%s<img src=\"%s\"%s alt=\"%s\"></img>" + *!) h="%s\n%s<img src=\"%s\"%s alt=\"%s\"></img>\n" before="${before%!}" ;; - *) h="%s<a href=\"%s\"%s>%s</a>" ;; + *) h="%s\n%s<a href=\"%s\"%s>\n%s</a>\n" ;; esac - printf "$h" "$before" "$url" "$title" "$text" + printf "$h" "$before" "$ESC_SEQ" "$url" "$title" "$text" next="${next#*$close}" done @@ -163,7 +190,7 @@ _get_indent () { indent=0 l="$*" while [ "$l" ]; do - c="${l%*${l#?}}" + c="${l%*"${l#?}"}" case "$c" in " ") indent=$((indent+1)) ;; *) @@ -261,6 +288,14 @@ _ol () { print_x $to_close "</ol>\n" } +# parse inline codeblocks +# +_inline_code () { + _emph '`' " +$ESC_SEQ<code>" "</code> +" +} + # parse multiline codeblocks # _code () { @@ -268,14 +303,19 @@ _code () { while IFS= read -r line; do case "$line" in " "*) + # prefix lines with newline to avoid trailing newline $codeblock && - printf "%s\n" "$ESC_SEQ${line# }" || + printf "\n%s" "$ESC_SEQ${line# }" || $content || { - printf "<pre><code>\n" + printf "%s<pre><code>%s" "$ESC_SEQ" "${line# }" codeblock=true - printf "%s\n" "$ESC_SEQ${line# }" } ;; + "") + $codeblock \ + && printf "\n%s" "$ESC_SEQ" \ + || printf "\n" + ;; *) $codeblock && { printf "</code></pre>\n" @@ -323,50 +363,60 @@ _blockquote () { print_x $((indent_level)) "</blockquote>\n" } -_post_escape () { +# add html header +# +_html () { + printf "<!DOCTYPE html>\n" + while IFS= read -r line; do + printf "%s\n" "$line" + done +} + +# remove all unecessary newlines +# +_squash () { while IFS= read -r line; do case "$line" in "$ESC_SEQ"*) - printf "%s\n" "${line#??}" + printf "\n%s" "${line#??}" ;; *) - printf "%s\n" "$line" + printf "%s" "$line" ;; esac done + printf "\n" } -_html () { - printf "<!DOCTYPE html>\n" - while IFS= read -r line; do - printf "%s\n" "$line" - done -} # convert the markdown from stdin into html # md2html () { # the order of these somewhat matters - _pre_emph \ + _pre_strip \ | _code \ + | _pre_emph \ | _blockquote \ | _ul \ | _ol \ | _p \ + | _a_img \ + | _inline_code \ | _emph '__' "<strong>" "</strong>" \ | _emph '_' "<em>" "</em>" \ - | _emph '`' "<code>" "</code>" \ | _post_emph \ - | _a_img \ | _h 6 \ | _h 5 \ | _h 4 \ | _h 3 \ | _h 2 \ | _h 1 \ - | _post_escape \ + | _squash \ | _html + + cat > /dev/null << EOF +EOF } md2html |