From 9d2cfc2561034f4ce2ec4fabdaadbe2c4489e9c2 Mon Sep 17 00:00:00 2001
From: Marat Radchenko <marat@slonopotamus.org>
Date: Sun, 12 May 2024 16:16:47 +0300
Subject: resolves #470 do not crash on an SVG image inside table cell (#473)

closes #471
---
 lib/asciidoctor-epub3/converter.rb | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/asciidoctor-epub3/converter.rb b/lib/asciidoctor-epub3/converter.rb
index 652e7f0..257d3b0 100644
--- a/lib/asciidoctor-epub3/converter.rb
+++ b/lib/asciidoctor-epub3/converter.rb
@@ -76,6 +76,10 @@ module Asciidoctor
 
       EPUB_EXTENSION_RX = /\.epub$/i.freeze
 
+      # This is a workaround for https://github.com/asciidoctor/asciidoctor/issues/4380
+      # Currently, there is no access to parent cell from inner document
+      PARENT_CELL_FIELD_NAME = :@epub3_parent_cell
+
       QUOTE_TAGS = begin
         tags = {
           monospaced: ['<code>', '</code>', true],
@@ -796,6 +800,7 @@ document.addEventListener('DOMContentLoaded', function(event, reader) {
                 else
                   case cell.style
                   when :asciidoc
+                    cell.inner_document.instance_variable_set(PARENT_CELL_FIELD_NAME, cell)
                     cell_content = %(<div class="embed">#{cell.content}</div>)
                   when :verse
                     cell_content = %(<div class="verse">#{cell.text}</div>)
@@ -1156,7 +1161,11 @@ document.addEventListener('DOMContentLoaded', function(event, reader) {
           return nil if node.nil?
           return node unless get_chapter_filename(node).nil?
 
-          node = node.parent
+          node = if node.instance_variable_defined?(PARENT_CELL_FIELD_NAME)
+                   node.instance_variable_get(PARENT_CELL_FIELD_NAME)
+                 else
+                   node.parent
+                 end
         end
       end
 
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