From bde44fadf20a1f91a466653f9552ce8bd658e2f9 Mon Sep 17 00:00:00 2001
From: Simon Späti <simu@sspaeti.com>
Date: Tue, 07 Feb 2023 08:16:15 +0000
Subject: [PATCH] feat: Adding Twitter and Social image preview including description (#207)
---
layouts/partials/textprocessing.html | 173 ++++++++++++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 152 insertions(+), 21 deletions(-)
diff --git a/layouts/partials/textprocessing.html b/layouts/partials/textprocessing.html
index 8e4a794..c918247 100644
--- a/layouts/partials/textprocessing.html
+++ b/layouts/partials/textprocessing.html
@@ -1,31 +1,162 @@
{{ $content := .Content }}
+{{ $raw := .RawContent }}
{{ $page := .Page }}
-{{/* Replace right arrow */}}
-{{ $content = replace $content "->" "→" }}
-
{{/* Escape slashes for Latex to fix line breaks */}}
-{{ $content = replaceRE "\\\\ *\n" "\\\\" $content }}
+{{$latex := findRE "(?:\\${2}([^\\$]+)\\${2})|(?:\\$([^\\$]*)\\$)" $content}}
+{{range $latex}}
+ {{$fixed := replaceRE "\\\\(?: +|\\n)" "\\\\ " .}}
+ {{$content = replace $content . $fixed}}
+{{end}}
{{/* Wikilinks */}}
-{{$wikilinks := $content | findRE "\\[\\[[^\\[\\]\\|]*(?:\\|[^\\[\\]]*)?\\]\\]" }}
+{{$wikilinks := $content | findRE "!?\\[\\[\\S[^\\[\\]\\|]*(?:\\|[^\\[\\]]*)?\\S\\]\\]" }}
+{{$codefences := $raw | findRE "\\x60[^\\x60\\n]+\\x60"}}
+{{$codeblocks := $raw | findRE "\\x60{3}[^\\x60]+\\x60{3}"}}
+{{$code := union $codefences $codeblocks}}
+
{{range $wikilinks}}
- {{$inner := . | strings.TrimPrefix "[[" | strings.TrimSuffix "]]" }}
- {{$split := split $inner "|"}}
- {{$path := index $split 0}}
- {{$reference := split $path "#"}}
- {{$title := index $reference 0}}
- {{$block := default "" (index $reference 1)}}
- {{$block = strings.TrimRight "/" (cond (eq $block "") $block (printf "#%s" $block))}}
- {{$href := strings.TrimRight "/" ($page.GetPage $title).RelPermalink}}
- {{$display := default $title (index $split 1)}}
- {{if not $href}}
- {{$link := printf "<a class=\"internal-link broken\">%s</a>" $display}}
- {{ $content = replace $content . $link }}
- {{else}}
- {{$fullhref := printf "%s%s" $href $block }}
- {{$link := printf "<a href=\"%s\" rel=\"noopener\" class=\"internal-link\" data-src=\"%s\">%s</a>" $fullhref $href $display}}
- {{ $content = replace $content . $link }}
+ {{$cur := .}}
+ {{$incode := false}}
+ {{range $code}}
+ {{if (in . $cur)}}
+ {{$incode = true}}
+ {{end}}
+ {{end}}
+
+ {{if not $incode}}
+
+ <!-- remove link delimiters -->
+ {{$inner := . | strings.TrimPrefix "!" | strings.TrimPrefix "[[" | strings.TrimSuffix "]]" }}
+ <!-- split from alias -->
+ {{$split := split $inner "|"}}
+ <!-- separate link path -->
+ {{$path := index $split 0}}
+
+ {{$reference := split $path "#"}}
+ <!-- path with heading link removed -->
+ {{$title := index $reference 0}}
+ <!-- $display is hyperlink display text -->
+ <!-- use alias, else title -->
+ {{$display := default $title (index $split 1)}}
+ <!-- remove subfolder from title -->
+ {{$display := index (last 1 (split $display "/")) 0}}
+
+ <!-- attempt to get title -->
+ {{$searchtitle := $title }}
+ {{$curpage := $page.GetPage $searchtitle }}
+ <!-- attempt to search md file instead -->
+ {{ if (eq $curpage.String "nopPage") }}
+ {{$searchtitle = (add $title ".md") }}
+ {{$curpage = $page.GetPage $searchtitle }}
+ {{ end }}
+ <!-- attempt to reverse typographer behaviour -->
+ {{ if (eq $curpage.String "nopPage") }}
+ {{$searchtitle = (replace $searchtitle "&" "&") }}
+ {{$searchtitle = (replace $searchtitle """ "\"") }}
+ {{$searchtitle = (replace $searchtitle "”" "\"") }}
+ {{$searchtitle = (replace $searchtitle "“" "\"") }}
+ {{$searchtitle = (replace $searchtitle "’" "'") }}
+ {{$searchtitle = (replace $searchtitle "‘" "'") }}
+ {{$curpage = $page.GetPage $searchtitle }}
+ {{ end }}
+ {{$relpath := relURL $path}}
+
+ <!-- If path to Hugo page -->
+ {{if not (eq $curpage.String "nopPage") }}
+ {{$block := default "" (index $reference 1)}}
+ {{$block = strings.TrimRight "/" (cond (eq $block "") $block (printf "#%s" $block)) | urlize | lower}}
+ {{$href := strings.TrimRight "/" $curpage.RelPermalink}}
+ {{$link := printf "<a href=\"%s%s\" rel=\"noopener\" class=\"internal-link\" data-src=\"%s\">%s</a>" $href $block $href $display}}
+ {{$content = replace $content . $link}}
+ <!-- If path to existing file -->
+ {{else if fileExists $relpath}}
+ {{$splitpath := split $relpath "/"}}
+ {{$dirname := first (sub (len $splitpath) 1) $splitpath | path.Join | urlize}}
+ {{$basename := index (last 1 $splitpath) 0}}
+ {{$href := printf "/%s/%s" $dirname $basename}}
+ <!-- Embedded? -->
+ {{if (hasPrefix . "!")}}
+ {{ $embed_ext := lower (path.Ext $href) }}
+ <!-- Image -->
+ {{if in ".png .jpg .jpeg .gif .bmp .svg" $embed_ext }}
+ {{$width := default "auto" (index $split 1) }}
+ {{$link := printf "<img src=\"%s\" width=\"%s\" />" $href $width}}
+ {{$content = replace $content . $link}}
+ <!-- Video -->
+ {{else if in ".mp4 .webm .ogv .mov .mkv" $embed_ext}}
+ {{$link := printf "<video src=\"%s\" style=\"width: -webkit-fill-available;\" controls></video>" $href}}
+ {{$content = replace $content . $link}}
+ <!-- Audio -->
+ {{else if in ".mp3 .webm .wav .m4a .ogg .3gp .flac" $embed_ext}}
+ {{$link := printf "<audio src=\"%s\" controls></audio>" $href}}
+ {{$content = replace $content . $link}}
+ <!-- PDF -->
+ {{else if in ".pdf" $embed_ext }}
+ {{$src_link := printf "<a href=\"%s\" rel=\"noopener\" class=\"internal-link\">[source]</a>" $href}}
+ {{$iframe_link := printf "<iframe src=\"%s\" style=\"height: -webkit-fill-available; width: -webkit-fill-available;\"></iframe>" $href}}
+ {{$link := printf "%s<br>%s" $src_link $iframe_link}}
+ {{$content = replace $content . $link}}
+ <!-- other -->
+ {{else}}
+ {{$link := printf "<a href=\"%s\" rel=\"noopener\" class=\"internal-link\">%s</a>" $href $href}}
+ {{$content = replace $content . $link}}
+ {{end}}
+ {{else}}
+ {{$link := printf "<a href=\"%s\" rel=\"noopener\" class=\"internal-link\">%s</a>" $href $display}}
+ {{$content = replace $content . $link}}
+ {{end}}
+ <!-- Broken path -->
+ {{else}}
+ {{$link := printf "<a class=\"internal-link broken\">%s</a>" $display}}
+ {{$content = replace $content . $link}}
+ {{end}}
+
{{end}}
{{end}}
+
+{{/* Add jumpable anchors */}}
+{{ $content = $content | replaceRE "(<h[1-9] id=\"([^\"]+)\">)(.+)(</h[1-9]>)" `<a href="#${2}">${1}<span class="hanchor" ariaLabel="Anchor"># </span>${3}${4}</a>` }}
+
+{{/* Callouts */}}
+{{if $.Site.Data.config.enableCallouts}}
+ {{ $content = $content | replaceRE "<blockquote>" "<blockquote class=callout>" }}
+ {{ $blockquoteclasses := findRE `\[!.+\]` $content }}
+ {{ $blockquoteclasses1 := findRE "<blockquote.*?>(.|\n)*?</blockquote>" $content }}
+ {{ $blockquotetags := findRE `blockquote class=callout` $content }}
+ {{ $counter := 0 }}
+ {{ $counter1 := 0 }}
+ {{ $finder := index $blockquoteclasses1 $counter }}
+ {{range $blockquotetags}}
+ {{ $finder = index $blockquoteclasses1 $counter }}
+ {{ if (in $finder "[!") }}
+ {{ $inner := index $blockquoteclasses $counter1 }}
+ {{ if (in $finder "]-") }}
+ {{ $inner = $inner | replaceRE `\[!([a-zA-Z]+)\]` `callout-collapsible callout-collapsed ${1}`}}
+ {{ else if (in $finder "]+") }}
+ {{ $inner = $inner | replaceRE `\[!([a-zA-Z]+)\]` `callout-collapsible ${1}`}}
+ {{ else}}
+ {{ $inner = $inner | replaceRE `\[!([a-zA-Z]+)\]` `${1}` }}
+ {{ end }}
+ {{ $inner = printf "blockquote class=\"%s-callout\"" $inner | lower}}
+ {{ $content = replace $content . $inner 1}}
+ {{ $counter1 = add $counter1 1 }}
+ {{ else }}
+ {{ $inner := print "blockquote" }}
+ {{ $content = replace $content . $inner 1}}
+ {{ end }}
+ {{ $counter = add $counter 1 }}
+ {{end}}
+ {{ $content = $content | replaceRE `\[![a-zA-Z]+\][-\+]?` "" }}
+ {{ $content = $content | replaceRE "blockquote class=callout" "blockquote" }}
+ {{ $content = $content | replaceRE `(?s)(<blockquote class="\S+-callout">.*?)<br>(.*?<\/blockquote)` `${1}</p><p>${2}` }}
+{{end}}
+
+{{/* Make ==text== into <mark>text</mark> */}}
+{{$mark := findRE "==([^=\n]+)==" $content}}
+{{range $mark}}
+ {{$fixed := printf "<mark>%s</mark>" (replace . "==" "")}}
+ {{$content = replace $content . $fixed}}
+{{end}}
+
{{ $content | safeHTML }}
--
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