From: Paul Hänsch <paul@plutz.net>
Date: Sun, 2 Jul 2023 22:43:01 +0000 (+0200)
Subject: Squashed 'cgilite/' changes from 9b2f5908..854547d4
X-Git-Url: https://git.plutz.net/?a=commitdiff_plain;h=f5a7a98f217d9a047cba2c9c92c21baa46d9e0db;p=shellwiki

Squashed 'cgilite/' changes from 9b2f5908..854547d4

854547d4 headline atttributes
b4a3f6a4 heading text in id
33570b0d block level prefix to avoid repeating headline IDs
516bc32d nesting of <section> in block elements
925f0423 unified headline function

git-subtree-dir: cgilite
git-subtree-split: 854547d423e0a1bc2d4437cb15e7c51d8be4904a
---

diff --git a/markdown.awk b/markdown.awk
index 0e6d949..506d22d 100755
--- a/markdown.awk
+++ b/markdown.awk
@@ -40,6 +40,7 @@
 # ----------------------------
 # - [x] Automatic <section>-wrapping (custom)
 # -  ?  Heading identifiers (php md, pandoc)
+#   - [x] Heading attributes (custom)
 # - [x] Automatic heading identifiers (custom)
 # - [x] Fenced code blocks (php md, pandoc)
 #   - [x] Fenced code attributes
@@ -307,19 +308,37 @@ function inline( line, LOCAL, len, code, href, guard ) {
   }
 }
 
+function headline( hlvl, htxt, attrib, LOCAL, sec, n, HL) {
+  split( gensub( /^(.* )?([0-9]+( [0-9]+){5})$/, "\\2" ,"1", hstack),  HL);
+
+  for ( n = hlvl; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
+  HL[hlvl]++; for ( n = hlvl + 1; n <= 6; n++) { HL[n] = 0;}
+  hid = ""; for ( n = 2; n <= blvl; n++) { hid = hid BL[n] "/"; }
+  hid = hid HL[1]; for ( n = 2; n <= hlvl; n++) { hid = hid "." HL[n] ; }
+  hid = hid ":" URL(htxt, 1);
+
+  hstack = gensub( /^(.* )?([0-9]+( [0-9]+){5})$/, "\\1" ,"1", hstack) \
+           HL[1] " " HL[2] " " HL[3] " " HL[4] " " HL[5] " " HL[6];
+
+  return sec "<section class=\"" (attrib ? "h" hlvl " " attrib : "h" hlvl)  "\" id=\"" hid "\">" \
+         "<h" hlvl (attrib ? " class=\"" attrib "\"" : "") ">" inline( htxt ) \
+         "<a class=\"anchor\" href=\"#" hid "\"></a>" \
+         "</h" hlvl ">\n\n";
+}
+
 # Nested Block, resets heading counters
-function _nblock( block, LOCAL, hlsav, sec ) {
-  # Keeping arrays in a local scope is awkward, so we serialize the HL array
-  # into the scalar hlsav
-  hlsav = HL[1] " " HL[2] " " HL[3] " " HL[4] " " HL[5] " " HL[6];
-  HL[1] = 0; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
+function _nblock( block, LOCAL, hlsav, sec, n ) {
+  hlsav = hstack;
+  hstack = hstack " 0 0 0 0 0 0";
 
   # Block Level
-  blvl++;
+  blvl++; BL[blvl]++;
+  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);
   sec = ""; for ( n = 1; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
-  split(hlsav, HL); blvl--;
+  hstack = hlsav; blvl--;
   return block sec;
 }
 
@@ -571,50 +590,60 @@ function _block( block, LOCAL, st, len, hlvl, htxt, sec, guard, code, indent, at
   gsub("(^|\n) {0," indent "}", "\n", list);
   return "\n<ol>\n" _list( substr(list, 2) ) "</ol>\n" _block( block );
 
-  # First Order Heading H1
-  } else if ( match( block, /^[^\n]+\n===+(\n|$)/ ) ) {
-    len = RLENGTH; sec = "";
+  # First Order Heading H1 + Attrib
+  } else if ( match( block, /^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n|$)/ ) ) {
+    len = RLENGTH;
+    text   = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n.*)?$/, "\\1", 1, block)
+    attrib = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n.*)?$/, "\\3", 1, block)
+    gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
+
+    return headline(1, text, attrib) \
+           _block( substr( block, len + 1 ) );
 
-    for ( n = 1; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
-    HL[1]++; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
-    hid = HL[1] ":" URL(gensub( /\n.*$/, "", "g", block ), 1);
+  # First Order Heading H1
+  } else if ( match( block, /^([^\n]+)\n===+(\n|$)/ ) ) {
+    len = RLENGTH;
+    text   = gensub(/^([^\n]+)\n===+(\n.*)?$/, "\\1", 1, block)
 
-    return sec "<section class=\"h1\"" ((blvl > 1)?"":" id=\"" hid "\"") ">" \
-           "<h1>" inline( gensub( /\n.*$/, "", "g", block ) ) \
-           ((blvl > 1)?"":"<a class=\"anchor\" href=\"#" hid "\"></a>") \
-           "</h1>\n\n" \
+    return headline(1, text, 0) \
            _block( substr( block, len + 1 ) );
 
-  # Second Order Heading H2
-  } else if ( match( block, /^[^\n]+\n---+(\n|$)/ ) ) {
-    len = RLENGTH; sec = "";
+  # Second Order Heading H2 + Attrib
+  } else if ( match( block, /^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n|$)/ ) ) {
+    len = RLENGTH;
+    text   = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n.*)?$/, "\\1", 1, block)
+    attrib = gensub(/^([^\n]+)([ \t]*\{([^\}\n]+)\})\n---+(\n.*)?$/, "\\3", 1, block)
+    gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
+
+    return headline(2, text, attrib) \
+           _block( substr( block, len + 1) );
 
-    for ( n = 2; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
-    HL[2]++; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0;
-    hid= HL[1] "." HL[2] ":" URL(gensub( /\n.*$/, "", "g", block ), 1);
+  # Second Order Heading H2
+  } else if ( match( block, /^([^\n]+)\n---+(\n|$)/ ) ) {
+    len = RLENGTH;
+    text   = gensub(/^([^\n]+)\n---+(\n.*)?$/, "\\1", 1, block)
 
-    return sec "<section class=\"h2\"" ((blvl > 1)?"":" id=\"" hid "\"") ">" \
-           "<h2>" inline( gensub( /\n.*$/, "", "g", block ) ) \
-           ((blvl > 1)?"":"<a class=\"anchor\" href=\"#" hid "\"></a>") \
-           "</h2>\n\n" \
+    return headline(2, text, 0) \
            _block( substr( block, len + 1) );
 
-  # Nth Order Heading H1 H2 H3 H4 H5 H6
-  } else if ( match( block, /^#{1,6}[ \t]*[^\n]+([ \t]*#*)(\n|$)/ ) ) {
-    len = RLENGTH; sec = "";
+  # Nth Order Heading H1 H2 H3 H4 H5 H6 + Attrib
+  } else if ( match( block, /^(#{1,6})[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[ \t]*[^ \t\n#])+)[ \t]*#*([ \t]*\{([a-zA-Z \t-]*)\})(\n|$)/ ) ) {
+    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);
+    gsub(/[^a-zA-Z0-9_-]+/, " ", attrib); gsub(/(^ | $)/, "", attrib);
 
-    hlvl = length( gensub( /^(#{1,6}).*$/, "\\1", "g", block ) );
-    htxt = gensub(/^#{1,6}[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[^\n#])+)([ \t]*#*)(\n.*)?$/, "\\1", 1, block);
+    return headline( length(n), text, attrib ) \
+           _block( substr( block, len + 1) );
 
-    for ( n = hlvl; n <= 6; n++ ) { sec = sec (HL[n]?"</section>":""); }
-    HL[hlvl]++; for ( n = hlvl + 1; n <= 6; n++) { HL[n] = 0;}
-    hid = HL[1]; for ( n = 2; n <= hlvl; n++) { hid = hid "." HL[n] ; }
-    hid = hid ":" URL(htxt, 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);
 
-    return sec "<section class=\"h" hlvl "\"" ((blvl > 1)?"":" id=\"" hid "\"") ">" \
-           "<h" hlvl ">" inline( htxt ) \
-           ((blvl > 1)?"":"<a class=\"anchor\" href=\"#" hid "\"></a>") \
-           "</h" hlvl ">\n\n" \
+    return headline( length(n), text, 0 ) \
            _block( substr( block, len + 1) );
 
   # block images (wrapped in <figure>)