# Meant to support all features of John Grubers basic Markdown
# + a number of common extensions, mostly inspired by Pandoc Markdown
+# Copyright 2021 - 2023 Paul Hänsch
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+# IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
# Supported Features / TODO:
# ==========================
# [x] done [ ] todo [-] not planned ? unsure
# - [x] Automatic <section>-wrapping (custom)
# - ? Heading identifiers (php md, pandoc)
# - [x] Heading attributes (custom)
+# - [ ] <hr> terminates section
# - [x] Automatic heading identifiers (custom)
# - [x] Fenced code blocks (php md, pandoc)
# - [x] Fenced code attributes
return text;
}
-function inline( line, LOCAL, len, code, href, guard ) {
- nu = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\_]|_[[:alnum:]])*" # not underline (except when escaped)
- na = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\\\*])*" # not asterisk (except when escaped)
- ieu = "_([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])_" # inner <em> (underline)
- isu = "__([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])__" # inner <strong> (underline)
- iea = "\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*" # inner <em> (asterisk)
- isa = "\\*\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*\\*" # inner <strong> (asterisk)
-
+function inline( line, LOCAL, len, text, code, href, guard ) {
if ( line ~ /^$/ ) { # Recursion End
return "";
code = substr( line, len + 1, match( substr(line, len + 1), guard ) - 1)
len = 2 * length(guard) + length(code)
# strip single surrounding white spaces
- code = gensub( /^ | $/, "", "g" , code)
+ gsub( /^ | $/, "", code)
# escape HTML within code span
gsub( /&/, "\\&", code ); gsub( /</, "\\<", code ); gsub( />/, "\\>", code );
return "<code>" code "</code>" inline( substr( line, len + 1 ) )
}
+ # Macros
+ } else if ( match( line, /^<<([^>]|>[^>])+>>/ ) ) {
+ len = RLENGTH;
+ return "<code class=\"macro\">" HTML( substr( line, 3, len - 4 ) ) "</code>" inline(substr(line, len + 1));
+
# Wiki style links
} else if ( match( line, /^\[\[([^]|]+)(\|[^]]+)?\]\]/) ) {
len = RLENGTH;
href = gensub(/^\[\[([^]|]+)(\|([^]]+))?\]\]/, "\\1", 1, substr(line, 1, len) );
text = gensub(/^\[\[([^]|]+)(\|([^]]+))?\]\]/, "\\3", 1, substr(line, 1, len) );
if ( ! text ) text = href;
- return "<a href=\"" URL(href) "\">" HTML(text) "</a>" inline( substr( line, len + 1) );
+ return "<a href=\"" HTML(href) "\">" HTML(text) "</a>" inline( substr( line, len + 1) );
# quick links ("automatic links" in md doc)
} else if ( match( line, /^<[a-zA-Z]+:\/\/([-\.[:alnum:]]+)(:[0-9]*)?(\/[^>]*)?>/ ) ) {
len = RLENGTH;
- href = URL( substr( line, 2, len - 2) );
+ href = HTML( substr( line, 2, len - 2) );
return "<a href=\"" href "\">" href "</a>" inline( substr( line, len + 1) );
# quick link email
} else if ( match( line, /^<[a-zA-Z0-9.!#$%&'\''*+\/=?^_`{|}~-]+@[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*>/ ) ) {
len = RLENGTH;
- href = URL( substr( line, 2, len - 2) );
+ href = HTML( substr( line, 2, len - 2) );
return "<a href=\"mailto:" href "\">" href "</a>" inline( substr( line, len + 1) );
+ # Verbatim inline HTML
+ } else if ( AllowHTML && match( line, /^(<!--([^-]|-[^-]|--[^>])*-->|<\?([^\?]|\?[^>])*\?>|<![A-Z][^>]*>|<!\[CDATA\[([^\]]|\][^\]]|\]\][^>])*\]\]>|<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)/) ) {
+ len = RLENGTH;
+ return substr( line, 1, len) inline(substr(line, len + 1));
+
# inline links
- # ,_______________________Image____________________________,
- } else if ( match(line, /^\[([^]]+|!\[[^]]*\]\([^"\)]+([ \t]+"[^"]+")?\)(\{[a-zA-Z \t-]*\})?)\]\(([^"\)]+)([[:space:]]+"([^"]+)")?\)/) ) {
+ } else if ( match(line, "^" lii "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)") ) {
len = RLENGTH;
- text = gensub(/^\[([^]]+|!\[[^]]*\]\([^"\)]+([ \t]+"[^"]+")?\)(\{[a-zA-Z \t-]*\})?)\]\(([^"\)]+)([[:space:]]+"([^"]+)")?\)/, \
- "\\1", 1, substr(line, 1, len) );
- href = gensub(/^\[([^]]+|!\[[^]]*\]\([^"\)]+([ \t]+"[^"]+")?\)(\{[a-zA-Z \t-]*\})?)\]\(([^"\)]+)([[:space:]]+"([^"]+)")?\)/, \
- "\\4", 1, substr(line, 1, len) );
- title = gensub(/^\[([^]]+|!\[[^]]*\]\([^"\)]+([ \t]+"[^"]+")?\)(\{[a-zA-Z \t-]*\})?)\]\(([^"\)]+)([[:space:]]+"([^"]+)")?\)/, \
- "\\6", 1, substr(line, 1, len) );
- if ( title ) {
- return "<a href=\"" URL(href) "\" title=\"" HTML(title) "\">" inline( text ) "</a>" inline( substr( line, len + 1) );
- } else {
- return "<a href=\"" URL(href) "\">" inline( text ) "</a>" inline( substr( line, len + 1) );
- }
+ text = href = title = substr( line, 1, len);
+ sub("^\\[", "", text); sub("\\]\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)$", "", text);
+ sub("^" lii "\\([\n\t ]*", "", href); sub("([\n\t ]+" lit ")?[\n\t ]*\\)$", "", href);
+ sub("^" lii "\\([\n\t ]*" lid, "", title); sub("[\n\t ]*\\)$", "", title); sub("^[\n\t ]+", "", title);
+
+ if ( match(href, /^<.*>$/) ) { sub(/^</, "", href); sub(/>$/, "", href); }
+ if ( match(title, /^".*"$/) ) { sub(/^"/, "", title); sub(/"$/, "", title); }
+ else if ( match(title, /^'.*'$/) ) { sub(/^'/, "", title); sub(/'$/, "", title); }
+ else if ( match(title, /^\(.*\)$/) ) { sub(/^\(/, "", title); sub(/\)$/, "", title); }
+
+ gsub(/\\/, "", href); gsub(/\\/, "", title); gsub(/[\n\t]+/, " ", title);
+
+ return "<a href=\"" HTML(href) "\"" (title?" title=\"" HTML(title) "\"":"") ">" \
+ inline( text ) "</a>" inline( substr( line, len + 1) );
# reference style links
} else if ( match(line, /^\[([^]]+)\] ?\[([^]]*)\]/ ) ) {
id = gensub(/^\[([^\n]+)\] ?\[([^\n]*)\].*/, "\\2", 1, substr(line, 1, len) );
if ( ! id ) id = text;
if ( rl_href[id] && rl_title[id] ) {
- return "<a href=\"" URL(rl_href[id]) "\" title=\"" HTML(rl_title[id]) "\">" inline(text) "</a>" inline( substr( line, len + 1) );
+ return "<a href=\"" HTML(rl_href[id]) "\" title=\"" HTML(rl_title[id]) "\">" inline(text) "</a>" inline( substr( line, len + 1) );
} else if ( rl_href[id] ) {
- return "<a href=\"" URL(rl_href[id]) "\">" inline(text) "</a>" inline( substr( line, len + 1) );
+ return "<a href=\"" HTML(rl_href[id]) "\">" inline(text) "</a>" inline( substr( line, len + 1) );
} else {
return "" HTML(substr(line, 1, len)) inline( substr(line, len + 1) );
}
# inline images
- } else if ( match(line, /^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?/) ) {
- len = RLENGTH;
- text = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?/, "\\1", "g", substr(line, 1, len) );
- href = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?/, "\\2", "g", substr(line, 1, len) );
- title = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?/, "\\4", "g", substr(line, 1, len) );
- attrib = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?/, "\\6", "g", substr(line, 1, len) );
- if ( title && attrib ) {
- return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\" title=\"" HTML(title) "\" class=\"" HTML(attrib) "\">" \
- inline( substr( line, len + 1) );
- } else if ( title ) {
- return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\" title=\"" HTML(title) "\">" \
- inline( substr( line, len + 1) );
- } else if ( attrib ) {
- return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\" class=\"" HTML(attrib) "\">" \
- inline( substr( line, len + 1) );
- } else {
- return "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\">" \
- inline( substr( line, len + 1) );
- }
+ } else if ( match(line, "^!" lix "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?") ) {
+ len = RLENGTH; text = href = title = attrib = substr( line, 1, len);
+
+ sub("^!\\[", "", text);
+ sub("\\]\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?$", "", text);
+
+ sub("^!" lix "\\([\n\t ]*", "", href);
+ sub("([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?$", "", href);
+
+ sub("^!" lix "\\([\n\t ]*" lid, "", title);
+ sub("[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?$", "", title);
+ sub("^[\n\t ]+", "", title);
+
+ sub("^!" lix "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)", "", attrib);
+ sub(/^\{[ \t]*/, "", attrib); sub(/[ \t]*\}$/, "", attrib); gsub(/[ \t]+/, " ", attrib);
+
+ if ( match(href, /^<.*>$/) ) { sub(/^</, "", href); sub(/>$/, "", href); }
+ if ( match(title, /^".*"$/) ) { sub(/^"/, "", title); sub(/"$/, "", title); }
+ else if ( match(title, /^'.*'$/) ) { sub(/^'/, "", title); sub(/'$/, "", title); }
+ else if ( match(title, /^\(.*\)$/) ) { sub(/^\(/, "", title); sub(/\)$/, "", title); }
+
+ gsub(/^[\t ]+$/, "", text); gsub(/\\/, "", href);
+ gsub(/\\/, "", title); gsub(/[\n\t]+/, " ", title);
+
+ return "<img src=\"" HTML(href, 1) "\" alt=\"" HTML(text?text:title?title:href) "\"" \
+ (title?" title=\"" HTML(title) "\"":"") (attrib?" class=\"" HTML(attrib) "\"":"") \
+ ">" inline( substr( line, len + 1) );
# reference style images
} else if ( match(line, /^!\[([^]]*)\] ?\[([^]]*)\]/ ) ) {
id = gensub(/^!\[([^\n]*)\] ?\[([^\n]*)\].*/, "\\2", 1, substr(line, 1, len) );
if ( ! id ) id = text;
if ( rl_href[id] && rl_title[id] ) {
- return "<img src=\"" URL(rl_href[id], 1) "\" alt=\"" HTML(text) "\" title=\"" HTML(rl_title[id]) "\">" \
+ return "<img src=\"" HTML(rl_href[id], 1) "\" alt=\"" HTML(text) "\" title=\"" HTML(rl_title[id]) "\">" \
inline( substr( line, len + 1) );
} else if ( rl_href[id] ) {
- return "<img src=\"" URL(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
+ return "<img src=\"" HTML(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
inline( substr( line, len + 1) );
} else {
return "" HTML(substr(line, 1, len)) inline( substr(line, len + 1) );
len = RLENGTH;
return "<em>" inline( substr( line, 2, len - 2 ) ) "</em>" inline( substr( line, len + 1 ) );
- # Macros
- } else if ( AllowMacros && match( line, /^<<([^>]|>[^>])+>>/) ) {
- len = RLENGTH;
- return macro( substr( line, 3, len - 4 ) ) inline(substr(line, len + 1));
-
- # Verbatim inline HTML
- } else if ( AllowHTML && match( line, /^(<!--([^-]|-[^-]|--[^>])*-->|<\?([^\?]|\?[^>])*\?>|<![A-Z][^>]*>|<!\[CDATA\[([^\]]|\][^\]]|\]\][^>])*\]\]>|<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)/) ) {
- len = RLENGTH;
- return substr( line, 1, len) inline(substr(line, len + 1));
-
# Literal HTML entities
} else if ( match( line, /^&([a-zA-Z]{2,32}|#[0-9]{1,7}|#[xX][0-9a-fA-F]{1,6});/) ) {
len = RLENGTH;
}
function headline( hlvl, htxt, attrib, LOCAL, sec, n, HL) {
- split( gensub( /^(.* )?([0-9]+( [0-9]+){5})$/, "\\2" ,"1", hstack), HL);
+ match(hstack, /([0-9]+( [0-9]+){5})$/); split( substr(hstack, RSTART), HL);
for ( n = hlvl; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
HL[hlvl]++; for ( n = hlvl + 1; n <= 6; n++) { HL[n] = 0;}
+
hid = ""; for ( n = 2; n <= blvl; n++) { hid = hid BL[n] "/"; }
hid = hid HL[1]; for ( n = 2; n <= hlvl; n++) { hid = hid "." HL[n] ; }
hid = hid ":" URL(htxt, 1);
- hstack = gensub( /^(.* )?([0-9]+( [0-9]+){5})$/, "\\1" ,"1", hstack) \
- HL[1] " " HL[2] " " HL[3] " " HL[4] " " HL[5] " " HL[6];
+ sub(/([0-9]+( [0-9]+){5})$/, "", hstack);
+ hstack = hstack HL[1] " " HL[2] " " HL[3] " " HL[4] " " HL[5] " " HL[6];
return sec "<section class=\"" (attrib ? "h" hlvl " " attrib : "h" hlvl) "\" id=\"" hid "\">" \
"<h" hlvl (attrib ? " class=\"" attrib "\"" : "") ">" inline( htxt ) \
}
# Nested Block, resets heading counters
-function _nblock( block, LOCAL, hlsav, sec, n ) {
- hlsav = hstack;
+function _nblock( block, LOCAL, sec, n ) {
hstack = hstack " 0 0 0 0 0 0";
# Block Level
for ( n = blvl + 1; n in BL; n++) { delete BL[n]; }
block = _block( block );
- split( gensub( /^(.* )?([0-9]+( [0-9]+){5})$/, "\\2" ,"1", hstack), HL);
+ match(hstack, /([0-9]+( [0-9]+){5})$/); split( substr(hstack, RSTART), HL);
sec = ""; for ( n = 1; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
- hstack = hlsav; blvl--;
+
+ sub("( +[0-9]+){6} *$", "", hstack); blvl--;
return block sec;
}
# Metadata (custom, block starting with %something)
# Metadata is ignored but can be interpreted externally
- } else if ( match(block, /^%[a-zA-Z]+([[:space:]][^\n]*)?(\n|$)(%[a-zA-Z]+([[:space:]][^\n]*)?(\n|$)|%([[:space:]][^\n]*)?(\n|$)|[ \t]+[^\n[:space:]][^\n]*(\n|$))*/) ) {
+ } else if ( match(block, /^%[a-zA-Z-]+([[:space:]][^\n]*)?(\n|$)(%[a-zA-Z-]+([[:space:]][^\n]*)?(\n|$)|%([[:space:]][^\n]*)?(\n|$)|[ \t]+[^\n[:space:]][^\n]*(\n|$))*/) ) {
len = RLENGTH; st = RSTART;
return _block( substr( block, len + 1) );
} else if ( match( block, /^> /) ) {
match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match(block, /$/);
len = RLENGTH; st = RSTART;
- return "<blockquote>" gensub( /^\n|\n$/, "", "g", _nblock( gensub( /(^|\n)> /, "\n", "g", substr(block, 1, st - 1) ) ) ) "</blockquote>\n\n" \
- _block( substr(block, st + len) );
+ text = substr(block, 1, st - 1); gsub( /(^|\n)> /, "\n", text );
+ text = _nblock( text ); gsub( /^\n|\n$/, "", text )
+ return "<blockquote>" text "</blockquote>\n\n" _block( substr(block, st + len) );
# Pipe Tables (pandoc / php md / gfm )
} else if ( match(block, "^((\\|)?([^\n]+\\|)+[^\n]+(\\|)?)\n" \
- "((\\|)?:?(-+:?[\\|+])+:?-+:?(\\|)?)\n" \
+ "((\\|)?(:?-+:?[\\|+])+:?-+:?(\\|)?)\n" \
"((\\|)?([^\n]+\\|)+[^\n]+(\\|)?(\n|$))+" ) ) {
len = RLENGTH; st = RSTART;
#initialize empty arrays
# Line Blocks (pandoc)
} else if ( match(block, /^\| [^\n]*(\n|$)(\| [^\n]*(\n|$)|[ \t]+[^\n[:space:]][^\n]*(\n|$))*/) ) {
len = RLENGTH; st = RSTART;
- text = substr(block, 1, len);
- gsub(/\n[[:space:]]+/, " ", text);
- gsub(/\n\| /, "\n", text);
- gsub(/^\| |\n$/, "", text);
- return "<div class=\"line-block\">" gensub(/\n/, "<br>\n", "g", inline( text )) "</div>\n" \
- _block( substr( block, len + 1) );
+
+ text = substr(block, 1, len); gsub(/\n[[:space:]]+/, " ", text);
+ gsub(/\n\| /, "\n", text); gsub(/^\| |\n$/, "", text);
+ text = inline(text); gsub(/\n/, "<br>\n", text);
+
+ return "<div class=\"line-block\">" text "</div>\n" _block( substr( block, len + 1) );
# Indented Code Block
} else if ( match(block, /^( |\t)( *\t*[^ \t\n]+ *\t*)+(\n|$)(( |\t)[^\n]+(\n|$)|[ \t]*(\n|$))*/) ) {
# First Order Heading H1 + Attrib
} else if ( match( block, /^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n|$)/ ) ) {
- len = RLENGTH;
- text = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n.*)?$/, "\\1", 1, block)
- attrib = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n.*)?$/, "\\3", 1, block)
+ len = RLENGTH; text = attrib = block;
+ sub(/([ \t]*\{([^\}\n]+)\})\n===+(\n.*)?$/, "", text);
+ sub(/\}\n===+(\n.*)?$/, "", attrib); sub(/^([^\n]+)[ \t]*\{/, "", attrib);
gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
- return headline(1, text, attrib) \
- _block( substr( block, len + 1 ) );
+ return headline(1, text, attrib) _block( substr( block, len + 1 ) );
# First Order Heading H1
} else if ( match( block, /^([^\n]+)\n===+(\n|$)/ ) ) {
- len = RLENGTH;
- text = gensub(/^([^\n]+)\n===+(\n.*)?$/, "\\1", 1, block)
+ len = RLENGTH; text = substr(block, 1, len);
+ sub(/\n===+(\n.*)?$/, "", text);
- return headline(1, text, 0) \
- _block( substr( block, len + 1 ) );
+ return headline(1, text, 0) _block( substr( block, len + 1 ) );
# Second Order Heading H2 + Attrib
} else if ( match( block, /^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n|$)/ ) ) {
- len = RLENGTH;
- text = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n.*)?$/, "\\1", 1, block)
- attrib = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n.*)?$/, "\\3", 1, block)
+ len = RLENGTH; text = attrib = block;
+ sub(/([ \t]*\{([^\}\n]+)\})\n---+(\n.*)?$/, "", text);
+ sub(/\}\n---+(\n.*)?$/, "", attrib); sub(/^([^\n]+)[ \t]*\{/, "", attrib);
gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
- return headline(2, text, attrib) \
- _block( substr( block, len + 1) );
+ return headline(2, text, attrib) _block( substr( block, len + 1) );
# Second Order Heading H2
} else if ( match( block, /^([^\n]+)\n---+(\n|$)/ ) ) {
- len = RLENGTH;
- text = gensub(/^([^\n]+)\n---+(\n.*)?$/, "\\1", 1, block)
+ len = RLENGTH; text = substr(block, 1, len);
+ sub(/\n---+(\n.*)?$/, "", text);
- return headline(2, text, 0) \
- _block( substr( block, len + 1) );
+ return headline(2, text, 0) _block( substr( block, len + 1) );
# Nth Order Heading H1 H2 H3 H4 H5 H6 + Attrib
} else if ( match( block, /^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n|$)/ ) ) {
- len = RLENGTH;
- n = gensub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n.*)?$/, "\\1", 1, block);
- text = gensub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n.*)?$/, "\\2", 1, block);
- attrib = gensub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n.*)?$/, "\\5", 1, block);
+ len = RLENGTH; text = attrib = substr(block, 1, len);
+ match(block, /^#{1,6}/); n = RLENGTH;
+
+ sub(/^(#{1,6})[ \t]*/, "", text); sub(/[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n.*)?$/, "", text);
+ sub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*[ \t]*\{/, "", attrib);
+ sub(/\})(\n.*)?$/, "", attrib);
gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
- return headline( length(n), text, attrib ) \
- _block( substr( block, len + 1) );
+ return headline( n, text, attrib ) _block( substr( block, len + 1) );
# Nth Order Heading H1 H2 H3 H4 H5 H6
} else if ( match( block, /^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*(\n|$)/ ) ) {
- len = RLENGTH;
- n = gensub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*(\n.*)?$/, "\\1", 1, block);
- text = gensub(/^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*(\n.*)?$/, "\\2", 1, block);
+ len = RLENGTH; text = substr(block, 1, len);
+ match(block, /^#{1,6}/); n = RLENGTH;
+ sub(/^(#{1,6})[ \t]*/, "", text); sub(/[ \t]*#*(\n.*)?$/, "", text);
- return headline( length(n), text, 0 ) \
- _block( substr( block, len + 1) );
+ return headline( n, text, 0 ) _block( substr( block, len + 1) );
# block images (wrapped in <figure>)
- } else if ( match(block, /^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?(\n|$)/) ) {
- len = RLENGTH;
- text = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?(\n.*)?$/, "\\1", "g", block);
- href = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?(\n.*)?$/, "\\2", "g", block);
- title = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?(\n.*)?$/, "\\4", "g", block);
- attrib = gensub(/^!\[([^]]*)\]\(([^"\)]+)([ \t]+"([^"]+)")?\)(\{([a-zA-Z \t-]*)\})?(\n.*)?$/, "\\6", "g", block);
- if ( title && attrib ) {
- return "<figure data-src=\"" URL(href, 1) "\" class=\"" HTML(attrib) "\">" \
- "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\" class=\"" HTML(attrib) "\">" \
- "<figcaption>" inline(title) "</figcaption>" \
- "</figure>\n\n" \
- _block( substr( block, len + 1) );
- } else if ( title ) {
- return "<figure data-src=\"" URL(href, 1) "\">" \
- "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\">" \
- "<figcaption>" inline(title) "</figcaption>" \
- "</figure>\n\n" \
- _block( substr( block, len + 1) );
- } else if ( attrib ) {
- return "<figure data-src=\"" URL(href, 1) "\" class=\"" HTML(attrib) "\">" \
- "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\" class=\"" HTML(attrib) "\">" \
- "</figure>\n\n" \
- _block( substr( block, len + 1) );
- } else {
- return "<figure data-src=\"" URL(href, 1) "\">" \
- "<img src=\"" URL(href, 1) "\" alt=\"" HTML(text) "\">" \
- "</figure>\n\n" \
- _block( substr( block, len + 1) );
- }
+ } else if ( match(block, "^!" lix "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?(\n|$)") ) {
+ len = RLENGTH; text = href = title = attrib = substr( block, 1, len);
+
+ sub("^!\\[", "", text);
+ sub("\\]\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?(\n.*)?$", "", text);
+
+ sub("^!" lix "\\([\n\t ]*", "", href);
+ sub("([\n\t ]+" lit ")?[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?(\n.*)?$", "", href);
+
+ sub("^!" lix "\\([\n\t ]*" lid, "", title);
+ sub("[\n\t ]*\\)(\\{[a-zA-Z \t-]*\\})?(\n.*)?$", "", title);
+ sub("^[\n\t ]+", "", title);
+
+ sub("^!" lix "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\)", "", attrib);
+ sub("(\n.*)?$", "", attrib);
+ sub(/^\{[ \t]*/, "", attrib); sub(/[ \t]*\}$/, "", attrib); gsub(/[ \t]+/, " ", attrib);
+
+ if ( match(href, /^<.*>$/) ) { sub(/^</, "", href); sub(/>$/, "", href); }
+ if ( match(title, /^".*"$/) ) { sub(/^"/, "", title); sub(/"$/, "", title); }
+ else if ( match(title, /^'.*'$/) ) { sub(/^'/, "", title); sub(/'$/, "", title); }
+ else if ( match(title, /^\(.*\)$/) ) { sub(/^\(/, "", title); sub(/\)$/, "", title); }
+
+ gsub(/^[\t ]+$/, "", text); gsub(/\\/, "", href);
+
+ return "<figure data-src=\"" HTML(href, 1) "\"" (attrib?" class=\"" HTML(attrib) "\"":"") ">" \
+ "<img src=\"" HTML(href, 1) "\" alt=\"" HTML(text?text:title?title:href) "\"" \
+ (attrib?" class=\"" HTML(attrib) "\"":"") ">" \
+ (title?"<figcaption>" inline(title) "</figcaption>":"") \
+ "</figure>\n\n" \
+ _block( substr( block, len + 1) );
# reference style images (block)
} else if ( match(line, /^!\[([^]]*)\] ?\[([^]]*)\](\n|$)/ ) ) {
id = gensub(/^!\[([^\n]*)\] ?\[([^\n]*)\](\n.*)?$/, "\\2", 1, block);
if ( ! id ) id = text;
if ( rl_href[id] && rl_title[id] ) {
- return "<figure data-src=\"" URL(rl_href[id], 1) "\">" \
- "<img src=\"" URL(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
+ return "<figure data-src=\"" HTML(rl_href[id], 1) "\">" \
+ "<img src=\"" HTML(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
"<figcaption>" inline(rl_title[id]) "</figcaption>" \
"</figure>\n\n" \
_block( substr( block, len + 1) );
} else if ( rl_href[id] ) {
- return "<figure data-src=\"" URL(rl_href[id], 1) "\">" \
- "<img src=\"" URL(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
+ return "<figure data-src=\"" HTML(rl_href[id], 1) "\">" \
+ "<img src=\"" HTML(rl_href[id], 1) "\" alt=\"" HTML(text) "\">" \
"</figure>\n\n" \
_block( substr( block, len + 1) );
} else {
}
# Macros (standalone <<macro>> calls handled as block, so they are not wrapped in paragraph)
- } else if ( AllowMacros && match( block, /^<<(([^>]|>[^>])+)>>(\n|$)/) ) {
+ } else if ( match( block, /^<<(([^>]|>[^>])+)>>(\n|$)/ ) ) {
len = RLENGTH;
text = gensub(/^<<(([^>]|>[^>])+)>>(\n.*)?$/, "\\1", 1, block);
- return macro(text) _block(substr(block, len + 1) );
-
- # Horizontal rule
- } else if ( match( block, /(^|\n) ? ? ?((\* *){3,}|(- *){3,}|(_ *){3,})($|\n)/) ) {
- len = RLENGTH; st = RSTART;
- return _block(substr(block, 1, st - 1)) "<hr>\n" _block(substr(block, st + len));
+ return "<code class=\"macro\">" HTML(text) "</code>" _block(substr(block, len + 1) );
# Definition list
} else if (match( block, "^(([ \t]*\n)*[^:\n \t][^\n]+\n" \
list = substr( block, 1, RLENGTH); block = substr( block, RLENGTH + 1);
return "\n<dl>\n" _dlist( list ) "</dl>\n" _block( block );
- # Unordered list
- } else if ( match( block, "(^|\n) ? ? ?[-+*][ \t][^\n]+(\n|$)" \
- "(([ \t]*\n)* ? ? ?[-+*][ \t][^\n]+(\n|$)" \
- "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
- "|[^\n \t][^\n]+(\n|$))*" ) ) {
- st = RSTART; len = RLENGTH; list = substr( block, RSTART, RLENGTH);
- sub("^\n", "", list); match(list, "^ ? ? ?[-+*]"); indent = RLENGTH;
- gsub( "(^|\n) {0," indent - 1 "}", "\n", list); sub("^\n", "", list);
-
- text = substr(block, 1, st - 1); block = substr(block, st + len);
- if (match( list, "\n([0-9]+\\.|#\\.)[ \t]" )) {
- block = substr(list, RSTART + 1) block;
- list = substr(list, 1, RSTART);
- }
-
- return _block( text ) "<ul>\n" _list( list, "[-+*]" ) "</ul>\n" _block( block );
-
- # Ordered list
- } else if ( match( block, "(^|\n) ? ? ?([0-9]+\\.|#\\.)[ \t][^\n]+(\n|$)" \
- "(([ \t]*\n)* ? ? ?([0-9]+\\.|#\\.)[ \t][^\n]+(\n|$)" \
- "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
- "|[^\n \t][^\n]+(\n|$))*" ) ) {
- st = RSTART; len = RLENGTH; list = substr( block, RSTART, RLENGTH);
- sub("^\n", "", list); match(list, "^ ? ? ?[0-9#]"); indent = RLENGTH;
- gsub( "(^|\n) {0," indent - 1 "}", "\n", list); sub("^\n", "", list);
-
- text = substr(block, 1, st - 1); block = substr(block, st + len);
- if (match( list, "\n[-+*][ \t]" )) {
- block = substr(list, RSTART + 1) block;
- list = substr(list, 1, RSTART);
- }
-
- return _block( text ) "<ol>\n" _list( list, "([0-9]+\\.|#\\.)" ) "</ol>\n" _block( block );
+ # Unordered list types
+ } else if ( text = _startlist( block, "ul", "-", "([+*•]|[0-9]+\\.|#\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ul", "\\+", "([-*•]|[0-9]+\\.|#\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ul", "\\*", "([-+•]|[0-9]+\\.|#\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ul", "•", "([-+*]|[0-9]+\\.|#\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+
+ # Ordered list types
+ } else if ( text = _startlist( block, "ol", "[0-9]+\\.", "([-+*•]|#\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ol", "[0-9]+\\)", "([-+*•]|[0-9]+\\.|#\\.|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ol", "#\\.", "([-+*•]|[0-9]+\\.|[0-9]+\\)|#\\))") ) {
+ return text;
+ } else if ( text = _startlist( block, "ol", "#\\)", "([-+*•]|[0-9]+\\.|#\\.|[0-9]+\\))") ) {
+ return text;
# Split paragraphs
} else if ( match( block, /(^|\n)[[:space:]]*(\n|$)/) ) {
return _block( substr(block, 1, st - 1) ) "\n" \
_block( substr(block, st + len) );
+ # Horizontal rule
+ } else if ( match( block, /(^|\n) ? ? ?((\* *){3,}|(- *){3,}|(_ *){3,})($|\n)/) ) {
+ len = RLENGTH; st = RSTART;
+ return _block(substr(block, 1, st - 1)) "<hr>\n" _block(substr(block, st + len));
+
# Plain paragraph
} else {
return "<p>" inline(block) "</p>\n";
}
}
-function _list (block, mark, LOCAL, len, st, text, indent, task) {
+function _startlist(block, type, mark, exclude, LOCAL, st, len, list, indent, text) {
+ if (match( block, "(^|\n) ? ? ?" mark "[ \t][^\n]+(\n|$)" \
+ "(([ \t]*\n)* ? ? ?" mark "[ \t][^\n]+(\n|$)" \
+ "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
+ "|[^\n \t][^\n]+(\n|$))*" ) ) {
+ st = RSTART; len = RLENGTH; list = substr( block, st, len);
+
+ sub("^\n", "", list); match(list, "^ ? ? ?"); indent = RLENGTH;
+ gsub( "(^|\n) {0," indent "}", "\n", list); sub("^\n", "", list);
+
+ text = substr(block, 1, st - 1); block = substr(block, st + len);
+ if (match(text, /\n[[:space:]]*\n/)) return 0;
+ if (match(text, "(^|\n) ? ? ?" exclude "[ \t][^\n]+")) return 0;
+ if (match( list, "\n" exclude "[ \t]" )) {
+ block = substr(list, RSTART + 1) block;
+ list = substr(list, 1, RSTART);
+ }
+
+ return _block( text ) "<" type ">\n" _list( list, mark ) "</" type ">\n" _block( block );
+ } else return 0;
+}
+
+function _list (block, mark, p, LOCAL, len, st, text, indent, task) {
if ( match(block, "^([ \t]*\n)*$")) return;
+
match(block, "^" mark "[ \t]"); indent = RLENGTH;
sub("^" mark "[ \t]", "", block);
- match( block, "\n" mark "[ \t][^\n]+(\n|$)" \
- "(([ \t]*\n)* ? ? ?" mark "[ \t][^\n]+(\n|$)" \
- "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \
- "|[^\n \t][^\n]+(\n|$))*");
- (RLENGTH == -1) ? st = length(block) + 1 : st = RSTART;
+ if (match(block, /\n[ \t]*\n/)) p = 1;
+
+ match( block, "\n" mark "[ \t][^\n]+(\n|$)" );
+ st = (RLENGTH == -1) ? length(block) + 1 : RSTART;
text = substr(block, 1, st); block = substr(block, st + 1);
gsub("\n {0," indent "}", "\n", text);
match( text, /^\[\/\]/ ) ? "<li class=\"task partial\"><input type=checkbox disabled>" : \
match( text, /^\[\?\]/ ) ? "<li class=\"task unsure\"><input type=checkbox disabled>" : \
match( text, /^\[[xX]\]/) ? "<li class=\"task done\"><input type=checkbox disabled checked>" : "<li>";
- sub(/^\[[- /xX]\]/, "", text);
+ sub(/^\[[-? \/xX]\]/, "", text);
- text = _block( text );
- if (match( text, "^<p>(</p[^>]|</[^p]|<[^/]|[^<])*</p>\n$" ))
+ text = _nblock( text );
+ if (
! p && match( text, "^<p>(</p[^>]|</[^p]|<[^/]|[^<])*</p>\n$" ))
gsub( "(^<p>|</p>\n$)", "", text);
- return task text "</li>\n" _list(block, mark);
+ return task text "</li>\n" _list(block, mark, p);
}
function _dlist (block, LOCAL, len, st, text, indent, p) {
sub( "^ ? ? ?:(\t| +)", "", text);
gsub( "(^|\n) {0," indent "}", "\n", text );
- text = _block(text);
+ text = _nblock(text);
if (match( text, "^<p>(</p[^>]|</[^p]|<[^/]|[^<])*</p>\n$" ))
gsub( "(^<p>|</p>\n$)", "", text);
HL[1] = 0; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
# hls = "0 0 0 0 0 0";
+ # Universal Patterns
+ nu = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\_]|_[[:alnum:]])*" # not underline (except when escaped)
+ na = "(\\\\\\\\|\\\\[^\\\\]|[^\\\\\\*])*" # not asterisk (except when escaped)
+ ieu = "_([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])_" # inner <em> (underline)
+ isu = "__([^_[:space:]]|[^_[:space:]]" nu "[^_[:space:]])__" # inner <strong> (underline)
+ iea = "\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*" # inner <em> (asterisk)
+ isa = "\\*\\*([^\\*[:space:]]|[^\\*[:space:]]" na "[^\\*[:space:]])\\*\\*" # inner <strong> (asterisk)
+
+ lix="\\[(\\\\[^\n]|[^]\n\\\\[])*\\]" # link text
+ lid="(<(\\\\[^\n]|[^\n<>\\\\])*>|(\\\\.|[^()\"'\\\\])+|([^<\n\t ()\\\\]|\\\\[^\n])(\\\\[\n]|[^\n\t \\(\\)\\\\])*)" # link dest
+ lit="(\"(\\\\.|[^\"\\\\])*\"|'(\\\\.|[^'\\\\])*'|\\((\\\\.|[^\\(\\)\\\\])*\\))" # link text
+ # link text with image def
+ lii="\\[(\\\\[^\n]|[^]\n\\\\[])*(!" lix "\\([\n\t ]*" lid "([\n\t ]+" lit ")?[\n\t ]*\\))?(\\\\[^\n]|[^]\n\\\\[])*\\]"
+
# Buffering of full file ist necessary, e.g. to find reference links
while (getline) { file = file $0 "\n"; }
# Clean up MS-DOS line breaks
projects / cgilite / blobdiff