From 9d764697cadca180ec975870dcd14704c1188e0a Mon Sep 17 00:00:00 2001
From: un-pogaz <46523284+un-pogaz@users.noreply.github.com>
Date: Sun, 30 Apr 2023 17:14:15 +0200
Subject: [PATCH] regex tweak

---
 .../gui2/markdown_syntax_highlighter.py       | 24 +++++++++----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/calibre/gui2/markdown_syntax_highlighter.py b/src/calibre/gui2/markdown_syntax_highlighter.py
index b131c8ddf4..9e7faa2ca0 100644
--- a/src/calibre/gui2/markdown_syntax_highlighter.py
+++ b/src/calibre/gui2/markdown_syntax_highlighter.py
@@ -14,14 +14,14 @@ from calibre.gui2.palette import dark_link_color, light_link_color
 class MarkdownHighlighter(QSyntaxHighlighter):
 
     MARKDOWN_KEYS_REGEX = {
-        'Bold' : re.compile(r'(?P<delim>\*\*)(?P<text>.+?)(?P=delim)'),
-        'uBold': re.compile('(?P<delim>__)(?P<text>.+?)(?P=delim)'),
-        'Italic': re.compile(r'(?P<delim>\*)(?P<text>([^*]{2,}?|[^*]))(?P=delim)'),
-        'uItalic': re.compile('(?P<delim>_)(?P<text>([^_]{2,}?|[^_]))(?P=delim)'),
-        'BoldItalic': re.compile(r'(?P<delim>\*\*\*)(?P<text>([^*]{2,}?|[^*]))(?P=delim)'),
-        'uBoldItalic': re.compile(r'(?P<delim>___)(?P<text>([^_]{2,}?|[^_]))(?P=delim)'),
-        'Link': re.compile(r'(?u)(?<!!)\[.*?\](\[.+?\]|\(.+?\))'),
-        'Image': re.compile(r'(?u)!\[.*?\](\[.+?\]|\(.+?\))'),
+        'Bold' : re.compile(r'(?<!\\)(?P<delim>\*\*)(?P<text>.+?)(?P=delim)'),
+        'uBold': re.compile(r'(?<!\\)(?P<delim>__)(?P<text>.+?)(?P=delim)'),
+        'Italic': re.compile(r'(?<!\\)(?P<delim>\*)(?P<text>([^*]{2,}?|[^*]))(?P=delim)'),
+        'uItalic': re.compile(r'(?<!\\)(?P<delim>_)(?P<text>([^_]{2,}?|[^_]))(?P=delim)'),
+        'BoldItalic': re.compile(r'(?<!\\)(?P<delim>\*\*\*)(?P<text>([^*]{2,}?|[^*]))(?P=delim)'),
+        'uBoldItalic': re.compile(r'(?<!\\)(?P<delim>___)(?P<text>([^_]{2,}?|[^_]))(?P=delim)'),
+        'Link': re.compile(r'(?u)(?<![!\\]])\[.*?(?<!\\)\](\[.+?(?<!\\)\]|\(.+?(?<!\\)\))'),
+        'Image': re.compile(r'(?u)(?<!\\)!\[.*?(?<!\\)\](\[.+?(?<!\\)\]|\(.+?(?<!\\)\))'),
         'LinkRef': re.compile(r'(?u)^ *\[.*?\]:[ \t]*.*$'),
         'HeaderAtx': re.compile(r'(?u)^\#{1,6}(.*?)\#*(''\n|$)'),
         'Header': re.compile('^(.+)[ \t]*\n(=+|-+)[ \t]*\n+'),
@@ -29,12 +29,12 @@ class MarkdownHighlighter(QSyntaxHighlighter):
         'UnorderedList': re.compile(r'(?u)^\s*(\* |\+ |- )+\s*'),
         'UnorderedListStar': re.compile(r'^\s*(\* )+\s*'),
         'OrderedList': re.compile(r'(?u)^\s*(\d+\. )\s*'),
-        'BlockQuote': re.compile(r'(?u)^\s*>+\s*'),
-        'BlockQuoteCount': re.compile('^[ \t]*>[ \t]?'),
-        'CodeSpan': re.compile('(?P<delim>`+).+?(?P=delim)'),
+        'BlockQuote': re.compile(r'(?u)^([ ]{0,3}>)+\s*'),
+        'BlockQuoteCount': re.compile(r'^[ ]{0,3}>[ \t]?'),
+        'CodeSpan': re.compile(r'(?<!\\)(?P<delim>`+).+?(?P=delim)'),
         'HeaderLine': re.compile(r'(?u)^(-|=)+\s*$'),
         'HR': re.compile(r'(?u)^(\s*(\*|-|_)\s*){3,}$'),
-        'Html': re.compile('<.+?>')
+        'Html': re.compile(r'<.+?(?<!\\)>')
     }
 
     key_theme_maps = {