First commit

1 files changed, 246 insertions, 0 deletions

@@ -0,0 +1,246 @@
+#!/usr/bin/awk -f
+# -*- indent-tabs-mode: t; -*-
+# HAT TRICK
+# (C) 2022 C. Duckworth
+
+### Commentary:
+
+# OLDIFS=$IFS; IFS=$'\n';
+# for line in `cat testfile`; do
+# test=`echo "$line" | grep -E '[\]$'`;
+# if [ $test ]; then
+# newline=`echo $line | rev | cut -c 2- | rev`;
+# echo -n "$newline"; else echo "$line";
+# fi; done;
+# IFS=$OLDIFS
+
+### Code:
+BEGIN {
+        width = 72
+        default_htag = "p"
+        default_gtag = ""
+        default_ftag = ""
+}
+
+### Raw formatting
+/^>>>/ {
+        getline first_raw
+        if (raw_fmt_p("html")) {
+                raw_html = 1
+                html[++hpar] = "<pre><code>" html_escape(first_raw)
+        }
+        if (raw_fmt_p("gemini")) {
+                raw_gemini = 1
+                gemini[++gpar] = "```"
+                gemini[++gpar] = first_raw
+        }
+        if (raw_fmt_p("gopher")) {
+                raw_gopher = 1
+                gopher[++fpar] = first_raw
+        }
+        raw = 1
+        next
+}
+
+/^<<</ {
+        if (raw_html) {
+                html[hpar] = html[hpar] "</code></pre>"
+        }
+        if (raw_gemini) {
+                gemini[++gpar] = "```"
+                gemini[++gpar] = ""
+        }
+        if (raw_gopher) {
+                gopher[++fpar] = ""
+        }
+        raw_html = 0
+        raw_gemini = 0
+        raw_gopher = 0
+        raw = 0
+        next
+}
+
+raw {
+        if (raw_html) {
+                html_empty = 0
+                html[++hpar] = html_escape($0)
+        }
+        if (raw_gemini) {
+                gemini_empty = 0
+                gemini[++gpar] = $0
+        }
+        if (raw_gopher) {
+                gopher_empty = 0
+                gopher[++fpar] = $0
+        }
+        next
+}
+
+# Block types
+/^#/ {
+        match($0, /#+/)
+        htag = "h" (RLENGTH > 6 ? 6 : RLENGTH)
+        gtag = substr($0, RSTART, (RLENGTH > 3 ? 3 : RLENGTH)) " "
+        ftag = substr($0, RSTART, RLENGTH) " "
+        sub(/^#+[ \t]*/, "", $0)
+}
+
+# Line types
+/^=>/ {
+        title = ""
+        for (i = 3; i <= NF; i++) {
+                title = title (title ? " " : "") $i
+        }
+        hbuf[++hline] = "<a href=\"" $2 "\">" title "</a>"
+        gbuf[++gline] = "\ngemini\t" $0
+        # TODO: gopher
+        next
+}
+
+### Everything else
+/./ {
+        html_empty = 0
+        gemini_empty = 0
+        gopher_empty = 0
+        hbuf[++hline] = $0
+        gbuf[++gline] = $0
+        fbuf[++fline] = $0
+}
+
+/^$/ {
+        bufput()
+}
+
+END {
+        bufput()
+        printarr(html, "html")
+        printarr(gemini, "gemini")
+        printarr(gopher, "gopher")
+}
+
+
+function bufput()
+{
+        hbufput()
+        gbufput()
+        fbufput()
+}
+
+function clear(arr)
+{
+        for (x in arr) {
+                delete arr[x]
+        }
+}
+
+function fbufput()
+{
+        if (! length(fbuf)) {
+                next
+        }
+        for (ln in fbuf) {      # XXX: gopher line types
+                paragraph = paragraph (paragraph ? " " : "") fbuf[ln]
+        }
+        fill(paragraph)
+        for (ln in fp) {
+                gopher[++fpar] = ((ln == 1) ? ftag : "") fp[ln]
+        }
+        gopher[++fpar] = ""
+        paragraph = ""
+        ftag = default_ftag
+        clear(fp)
+        clear(fbuf)
+}
+
+function fill(paragraph)
+{
+        char = 0
+        ln = 1
+        split(paragraph, words, FS)
+        for (word in words) {
+                char += length(words[word])
+                if (char <= width) {
+                        fp[ln] = fp[ln] (fp[ln] ? " " : "") words[word]
+                } else {
+                        fp[++ln] = words[word]
+                        char = length(words[word])
+                }
+        }
+}
+
+function gbufput()
+{
+        if (! length(gbuf)) {
+                next
+        }
+        for (ln in gbuf) {
+                paragraph = paragraph (paragraph ? " " : "") gbuf[ln]
+        }
+        gemini[++gpar] = gtag paragraph
+        gemini[++gpar] = ""
+        gtag = default_gtag
+        paragraph = ""
+        clear(gbuf)
+}
+
+function gopher_line(type, display, selector, hostname, port)
+{
+        return (type display "\t" selector "\t" hostname "\t" port)
+}
+
+function hbufput()
+{
+        if (! length(hbuf)) {
+                next
+        }
+        for (ln in hbuf) {
+                paragraph = paragraph (paragraph ? " " : "") hbuf[ln]
+        }
+        fill(paragraph)
+        for (ln in fp) {
+                html[++hpar] = ((ln == 1) ? "<" (htag ? htag : default_htag) ">" : "") fp[ln]
+        }
+        html[hpar] = html[hpar] (htag_end ? htag_end : "</" (htag ? htag : default_htag) ">")
+        paragraph = ""
+        htag = default_htag
+        clear(fp)
+        clear(hbuf)
+}
+
+function html_escape(text)
+{
+        gsub(/&/, "\\&amp;", text)
+        gsub(/</, "\\&lt;", text)
+        gsub(/>/, "\\&gt;", text)
+        return text
+}
+
+function printarr(arr, prefix)
+{
+        if (prefix) {
+                fmt = "%s\t%s\n"
+        } else {
+                fmt = "%s%s\n"
+        }
+        for (x in arr) {
+                printf fmt, prefix, arr[x]
+        }
+}
+
+function raw_fmt_p(format)
+{
+        if (NF < 2) {
+                return 1
+        }
+        if ($2 ~ /-/) {
+                if ($2 ~ ("-" format)) {
+                        return 0
+                } else {
+                        return 1
+                }
+        }
+        if ($2 ~ format) {
+                return 1
+        }
+        return 0
+}