From 387e1b0a16d6c12a09f6ee7dfeff1eca96bf9205 Mon Sep 17 00:00:00 2001
From: Ben Edgington <ben@benjaminion.xyz>
Date: Mon, 16 Jun 2025 12:33:51 +0100
Subject: [PATCH] Introduce spans for wrapping long strings

---
 bin/pdf/filters/linebreaks.lua | 14 ++++++++++++++
 bin/pdf/inc/header.tex         |  5 +++++
 src/css/page.css               |  5 +++++
 3 files changed, 24 insertions(+)

diff --git a/bin/pdf/filters/linebreaks.lua b/bin/pdf/filters/linebreaks.lua
index f69e073..073803f 100644
--- a/bin/pdf/filters/linebreaks.lua
+++ b/bin/pdf/filters/linebreaks.lua
@@ -15,3 +15,17 @@ function RawInline (el)
    end
    return el
 end
+
+-- We now support <span class="wrap">...</span>
+-- These spans must contain only raw text (or backquoted code), with no nested elements
+function Span (span)
+  if span.classes:includes('wrap') then
+    if (span.content[1].t == 'Str') then
+      return pandoc.RawInline('latex', '\\seqsplit{' .. span.content[1].text .. '}')
+    end
+    if (span.content[1].t == 'Code') then
+      return pandoc.RawInline('latex', '\\texttt{\\seqsplit{' .. span.content[1].text .. '}}')
+    end
+  end
+  return span
+end
diff --git a/bin/pdf/inc/header.tex b/bin/pdf/inc/header.tex
index 8195493..1ebb8bb 100644
--- a/bin/pdf/inc/header.tex
+++ b/bin/pdf/inc/header.tex
@@ -154,3 +154,8 @@
   \let\prevsubparagraph\subparagraph
   \renewcommand{\subparagraph}[1]{\prevsubparagraph{#1}\nopagebreak}
 \fi
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Used by linebreaks.lua to split long hexadecimal strings
+
+\usepackage{seqsplit}
diff --git a/src/css/page.css b/src/css/page.css
index 1088773..de987b2 100644
--- a/src/css/page.css
+++ b/src/css/page.css
@@ -86,6 +86,11 @@ code {
   font-size: 95%;
 }
 
+/*** Wrapping long lines of hex ***/
+span.wrap {
+  word-break: break-all;
+}
+
 /*** Constant line heights ***/
 
 sup, sub {