feat!: Implement syntax highlighting, based on another tool

4 files changed, 69 insertions, 36 deletions

diff --git a/ext/highlight.awk b/ext/highlight.awk
new file mode 100644
index 0000000..a1f15fa
--- /dev/null
+++ b/ext/highlight.awk
@@ -0,0 +1,35 @@
+BEGIN {
+	highlight_cmd   = ENVIRON["HIGHLIGHT"] " -O html -f -S " # expected language name in the end!
+	highlight_out   = "/tmp/__fragment"
+	highlight_langs = "awk,bat,bison,y,bash,sh,zsh,yacc,c,cpp,h,hpp,csharp,cs,css,"    \
+	                  "diff,patch,dockerfile,email,go,haskell,hs,html,htm,xhtml,"    \
+	                  "httpd,ini,cfg,desktop,java,gradle,javascript,js,json,kotlin," \
+	                  "lisp,cl,clisp,sbcl,lua,makefile,mk,markdown,md,meson,mssql,"  \
+	                  "nix,perl,pl,php,python,py,qmake,rust,rs,s,sql,svg,tex,toml,xml,yaml"
+}
+
+ENVIRON["HIGHLIGHT"] && language && blocks_names[blocks_opened] == "CODE" {
+	hl_lang = tolower(language)
+	if (hl_lang == "yacc")  hl_lang = "y"
+	if (hl_lang == "latex") hl_lang = "tex"
+
+	transcludes_file = toupper($1) == "'INCLUDE" || toupper($1) == "'SNIPPET"
+
+	if (highlight_langs ~ hl_lang && (transcludes_file || !/^[ \t]*'/)) {
+		__tmp = FILE_EXTENSION
+		FILE_EXTENSION = ""
+
+		if (transcludes_file)
+			process_command(toupper(substr($1, 2)))
+
+		highlight = highlight_cmd hl_lang " > " highlight_out
+
+		print | highlight
+		close(highlight)
+
+		$0 = getfile(highlight_out)
+		gsub(/\\/, "\\\\")
+
+		FILE_EXTENSION = __tmp
+	}
+}
diff --git a/generate.sh b/generate.sh
index 44df429..a9efe8c 100755
--- a/generate.sh
+++ b/generate.sh
@@ -17,6 +17,7 @@ NO_FIX=
 NO_META=
 NO_TINY=
 FORCE_GEN=
+HIGHLIGHT=
 while [ -n "$1" ]
 do
 	case "$1" in
@@ -24,11 +25,22 @@ do
 		(-m|--no_meta) NO_META=y ;;
 		(-t|--no_tiny) NO_TINY=y ;;
 		(-f|--force)   FORCE_GEN=y ;;
+		(-hi|--highlight)
+			if command -v highlight >/dev/null 2>&1
+			then
+				HIGHLIGHT="$(command -v highlight)"
+			else
+				echo 'Requested highlighting but could not find "highlight" command!'
+				exit 1
+			fi
+			;;
 		(*) echo "Unknown argument '$1'!" ; exit 1 ;;
 	esac
 	shift
 done
 
+export HIGHLIGHT
+
 #== 0. Check for changes ==#
 
 if [ -z "$FORCE_GEN" ]                                        \
@@ -78,6 +90,7 @@ cp -a "$SRC/." "$DST"
 /bin/sh ./dunbar/dunbar_awk/dunbar.sh html         \
 	-i                                             \
 	-e ./ext/pagenav.awk -e ./ext/presentation.awk \
+	-e ./ext/highlight.awk                         \
 	./ext/global.du                                \
 	$(find "$DST" -type f -name "*.du")
 
diff --git a/meta/header.html b/meta/header.html
index 6e0963d..f377483 100644
--- a/meta/header.html
+++ b/meta/header.html
@@ -103,7 +103,8 @@
 			<a href="https://gitlab.com/Syndamia/syndamiadotcom" target="_blank" class="link-tab">Powered with:</a><span class="br"></span>
 			<a href="https://gitlab.com/Syndamia/dunbar" target="_blank" class="link-tab">dunbar</a><span class="br"></span><span class="nocss-aid">, </span>
 			<a href="https://invisible-island.net/mawk/" target="_blank" class="link-tab">mawk</a><span class="br"></span><span class="nocss-aid">, </span>
-			<a href="https://www.gnu.org/software/bash/" target="_blank" class="link-tab">GNU bash</a>
+			<a href="https://www.gnu.org/software/bash/" target="_blank" class="link-tab">GNU bash</a><span class="br"></span><span class="nocss-aid">, </span>
+			<a href="http://andre-simon.de/doku/highlight/en/highlight.php" target="_blank" class="link-tab">Highlight</a>
 		</nav>
 	</nav>
 
diff --git a/src/styles.css b/src/styles.css
index 133afe2..747ec72 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -37,25 +37,15 @@
   --hic-orange: #af3a03;
 
   --hi-comment:      var(--hic-gray);
-  --hi-const:        var(--hic-purple);
   --hi-string:       var(--hic-green);
-  --hi-char:         var(--hic-purple);
+  --hi-interp:       var(--hic-purple);
   --hi-number:       var(--hic-purple);
-  --hi-bool:         var(--hic-purple);
-  --hi-float:        var(--hic-purple);
-  --hi-identifier:   var(--hic-blue);
   --hi-function:     var(--hic-green);
-  --hi-statement:    var(--hic-red);
-  --hi-conditional:  var(--hic-red);
-  --hi-repeat:       var(--hic-red);
-  --hi-operator:     var(--hi-fg);
-  --hi-keyword:      var(--hic-red); /* Label and Exception are keywords */
+  --hi-operator:     var(--hic-orange);
+  --hi-keyword:      var(--hic-red);
   --hi-preproc:      var(--hic-aqua);
   --hi-type:         var(--hic-yellow);
-  --hi-storageclass: var(--hic-orange);
-  --hi-structure:    var(--hic-aqua);
-  --hi-typedef:      var(--hic-aqua);
-  --hi-ignore:       var(--hi-fg);
+  --hi-escape:       var(--hic-orange);
 }
 
 /*## Global ##*/
@@ -467,27 +457,21 @@ table pre > code {
 }
 dd code { font-size: 0.8em; }
 
-.HI-comment      { color: var(--hi-comment); }
-.HI-const        { color: var(--hi-const); }
-.HI-string       { color: var(--hi-string); }
-.HI-char         { color: var(--hi-char); }
-.HI-number       { color: var(--hi-number); }
-.HI-bool         { color: var(--hi-bool); }
-.HI-float        { color: var(--hi-float); }
-.HI-identifier   { color: var(--hi-identifier); }
-.HI-function     { color: var(--hi-function); }
-.HI-statement    { color: var(--hi-statement); }
-.HI-conditional  { color: var(--hi-conditional); }
-.HI-repeat       { color: var(--hi-repeat); }
-.HI-operator     { color: var(--hi-operator); }
-.HI-keyword      { color: var(--hi-keyword); /* Label and Exception are keywords */ }
-.HI-preproc      { color: var(--hi-preproc); }
-.HI-type         { color: var(--hi-type); }
-.HI-storageclass { color: var(--hi-storageclass); }
-.HI-structure    { color: var(--hi-structure); }
-.HI-typedef      { color: var(--hi-typedef); }
-.HI-ignore       { color: var(--hi-ignore); }
-.HI-comment *    { color: inherit; } /* If text inside a comment is matched, don't show it */
+.hl.erm { color:#ff0000; font-weight:bold; border:solid 1px red; margin-left: 3em; }
+.hl.err { color:#ff0000; font-weight:bold; }
+.hl.kwf { color:#750dc3; }
+
+.hl.slc, .hl.com { color: var(--hi-comment); }
+.hl.pps, .hl.sng { color: var(--hi-string); }
+.hl.kwb, .hl.kwc { color: var(--hi-type); }
+.hl.num          { color: var(--hi-number); }
+.hl.ipl          { color: var(--hi-interp); }
+.hl.kwd          { color: var(--hi-function); font-weight: bold; }
+.hl.kwa          { color: var(--hi-keyword); }
+.hl.opt          { color: var(--hi-operator); }
+.hl.ppc          { color: var(--hi-preproc); }
+.hl.esc          { color: var(--hi-escape); }
+.hl.kwe          { color: inherit; }
 
 /*### Wrapper > Article > table ###*/