From e618f910caf3d7cece02289ff5aa04a38adf4b42 Mon Sep 17 00:00:00 2001
From: bouzidanas <anasbouzid@gmail.com>
Date: Mon, 12 Sep 2022 08:17:29 -0500
Subject: [PATCH] Added ability to set slide/section "data-*" attributes
 (#1861)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 share/templates/reveal/base.html.j2     | 7 ++++---
 share/templates/reveal/cellslidedata.j2 | 9 +++++++++
 2 files changed, 13 insertions(+), 3 deletions(-)
 create mode 100644 share/templates/reveal/cellslidedata.j2

diff --git a/share/templates/reveal/base.html.j2 b/share/templates/reveal/base.html.j2
index 95d40011c..be07920d4 100644
--- a/share/templates/reveal/base.html.j2
+++ b/share/templates/reveal/base.html.j2
@@ -1,14 +1,15 @@
 {%- extends 'lab/base.html.j2' -%}
+{% from 'cellslidedata.j2' import cellslidedata %}
 
 {%- block any_cell scoped -%}
 {%- if cell.metadata.get('slide_start', False) -%}
-<section>
+<section {{ cellslidedata(cell) }}>
 {%- endif -%}
 {%- if cell.metadata.get('subslide_start', False) -%}
-<section>
+<section {{ cellslidedata(cell) }}>
 {%- endif -%}
 {%- if cell.metadata.get('fragment_start', False) -%}
-<div class="fragment">
+<div class="fragment" {{ cellslidedata(cell) }}>
 {%- endif -%}
 
 {%- if cell.metadata.slide_type == 'notes' -%}
diff --git a/share/templates/reveal/cellslidedata.j2 b/share/templates/reveal/cellslidedata.j2
new file mode 100644
index 000000000..d759f1e92
--- /dev/null
+++ b/share/templates/reveal/cellslidedata.j2
@@ -0,0 +1,9 @@
+{%- macro cellslidedata(cell) -%}
+    {% if cell.metadata.slideshow | length > 0 -%}
+        {% if cell.metadata.slideshow.data | length > 0 -%}
+            {% for key in (cell.metadata.slideshow.data) -%}
+                {{- (' data_' ~ key)|replace("_", "-") -}}="{{- cell.metadata.slideshow.data[key]|escape_html -}}"
+            {%- endfor -%}
+        {%- endif %}
+    {%- endif %}
+{%- endmacro %}