From d29351abf766b563cb95780d28e28f6412297f20 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Mon, 30 Jan 2023 21:23:42 -0500
Subject: [PATCH] replace leading space to emsp

---
 journal/templates/review_edit.html | 9 ++++++++-
 journal/views.py                   | 7 +++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/journal/templates/review_edit.html b/journal/templates/review_edit.html
index a902a24f..31a5fddc 100644
--- a/journal/templates/review_edit.html
+++ b/journal/templates/review_edit.html
@@ -44,7 +44,14 @@
                 <div id="rawContent">
                   {{ form.body }}
                 </div>
-                <div class="review-form__fyi">{% trans '不知道什么是Markdown？可以参考' %}<a target="_blank" href="https://www.markdownguide.org/">{% trans '这里' %}</a></div>
+                <div>
+                <label for="leading_space" style="display: inline;">
+                  <input type="checkbox" name="leading_space" value="1" id="leading_space" checked> 保留行首空格（替换为全角）
+                </label>
+                <span class="review-form__fyi">
+                  {% trans '不知道什么是Markdown？可以参考' %}<a target="_blank" href="https://www.markdownguide.org/">{% trans '这里' %}</a>
+                </span>
+                </div>
                 <div class="review-form__option">
                   <div class="review-form__visibility-radio">
 
diff --git a/journal/views.py b/journal/views.py
index 1c8e8058..9dd3733e 100644
--- a/journal/views.py
+++ b/journal/views.py
@@ -436,6 +436,13 @@ def review_edit(request, item_uuid, review_uuid=None):
                     mark_date = None
             if mark_date:
                 form.instance.created_time = mark_date
+            if request.POST.get("leading_space"):
+                form.instance.body = re.sub(
+                    r"^(\u2003*)( +)",
+                    lambda s: "\u2003" * ((len(s[2]) + 1) // 2 + len(s[1])),
+                    form.instance.body,
+                    flags=re.MULTILINE,
+                )
             form.save()
             if form.cleaned_data["share_to_mastodon"]:
                 form.instance.save = lambda **args: None