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Fix matching of blockquotes
[etc/mutt.git] / .mutt / markdown2html
diff --git a/.mutt/markdown2html b/.mutt/markdown2html
index e0a2b19677adb121ba4dabf01df2afb8dcfce281..487d3db98ab227baca19a888d6cd925b7b412d8f 100755 (executable)
--- a/.mutt/markdown2html
+++ b/.mutt/markdown2html
@@ -95,6 +95,7 @@ h4 { font-size: 107%; }
 h5 { font-size: 103%; }
 h6 { font-size: 100%; }
 p { padding: 0 0.5em; }
 h5 { font-size: 103%; }
 h6 { font-size: 100%; }
 p { padding: 0 0.5em; }
+pre { padding: 0 1em; }
 '''
 
 STYLESHEET = os.path.join(os.path.expanduser('~/.mutt'),
 '''
 
 STYLESHEET = os.path.join(os.path.expanduser('~/.mutt'),
@@ -102,20 +103,16 @@ STYLESHEET = os.path.join(os.path.expanduser('~/.mutt'),
 if os.path.exists(STYLESHEET):
     DEFAULT_CSS += open(STYLESHEET).read()
 
 if os.path.exists(STYLESHEET):
     DEFAULT_CSS += open(STYLESHEET).read()
 
-HTML_DOCUMENT = '''<!DOCTYPE html>
-<html><head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
-<meta charset="utf-8"/>
-<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"/>
-</head><body class="email">
-{htmlbody}
-</body></html>'''
-
-
 SIGNATURE_HTML = \
         '<div class="signature"><span class="leader">-- </span>{sig}</div>'
 
 
 SIGNATURE_HTML = \
         '<div class="signature"><span class="leader">-- </span>{sig}</div>'
 
 
+def _preprocess_signature(sig):
+    '''
+    Preprocess the signature before markdown processing.
+    '''
+    return sig
+
 def _preprocess_markdown(mdwn):
     '''
     Preprocess Markdown for handling by the converter.
 def _preprocess_markdown(mdwn):
     '''
     Preprocess Markdown for handling by the converter.
@@ -133,6 +130,13 @@ def _preprocess_markdown(mdwn):
     # text-mode HTML2text converters, and so it's left commented for now.
     #ret = re.sub(r'\n>', r'  \n>[>]{.quotechar}', ret, flags=re.MULTILINE)
 
     # text-mode HTML2text converters, and so it's left commented for now.
     #ret = re.sub(r'\n>', r'  \n>[>]{.quotechar}', ret, flags=re.MULTILINE)
 
+    # With the autolink_bare_uris extension, we do not need to put links into
+    # angle brackets to have them converted, so let's conserve the brackets
+    # when used around email addresses. Note that this needs a postprocessing
+    # hack because the pandoc autolink converted includes the ambersand
+    # (https://github.com/jgm/pandoc/issues/7398).
+    ret = re.sub(r'<([^@]+@.+\.[^>]+)>', r'&lt;\g<1> -PANDOC_BUG_7398-&gt;', ret)
+
     return ret
 
 
     return ret
 
 
@@ -174,7 +178,7 @@ def _identify_quotes_for_later(mdwn):
         # The lead-in to a quote is a single line immediately preceding the
         # quote, and ending with ':'. Note that there could be multiple of
         # these:
         # The lead-in to a quote is a single line immediately preceding the
         # quote, and ending with ':'. Note that there could be multiple of
         # these:
-        if re.match(r'^.+:\s*$', cur) and nxt.startswith('>'):
+        if re.match(r'^[^>]+.*:\s*$', cur) and nxt.startswith('>'):
             ret.append(f'{{.quotelead}}{cur.strip()}')
             # pandoc needs an empty line before the blockquote, so
             # we enter one for the purpose of HTML rendition:
             ret.append(f'{{.quotelead}}{cur.strip()}')
             # pandoc needs an empty line before the blockquote, so
             # we enter one for the purpose of HTML rendition:
@@ -183,13 +187,13 @@ def _identify_quotes_for_later(mdwn):
 
         # The first blockquote after such a lead-in gets marked as the
         # "initial" quote:
 
         # The first blockquote after such a lead-in gets marked as the
         # "initial" quote:
-        elif prev and re.match(r'^.+:\s*$', prev) and cur.startswith('>'):
+        elif prev and re.match(r'^[^>]+.*:\s*$', prev) and cur.startswith('>'):
             ret.append(re.sub(r'^(\s*>\s*)+(.+)',
                               r'\g<1>{.quoteinitial}\g<2>',
                               cur, flags=re.MULTILINE))
 
         # All other occurrences of blockquotes get the "subsequent" marker:
             ret.append(re.sub(r'^(\s*>\s*)+(.+)',
                               r'\g<1>{.quoteinitial}\g<2>',
                               cur, flags=re.MULTILINE))
 
         # All other occurrences of blockquotes get the "subsequent" marker:
-        elif cur.startswith('>') and prev and not prev.startswith('>'):
+        elif cur.startswith('>') and prev is not None and not prev.startswith('>'):
             ret.append(re.sub(r'^((?:\s*>\s*)+)(.+)',
                               r'\g<1>{.quotesubsequent}\g<2>',
                               cur, flags=re.MULTILINE))
             ret.append(re.sub(r'^((?:\s*>\s*)+)(.+)',
                               r'\g<1>{.quotesubsequent}\g<2>',
                               cur, flags=re.MULTILINE))
@@ -277,6 +281,10 @@ def _postprocess_html(html):
     '''
     Postprocess the generated and styled HTML.
     '''
     '''
     Postprocess the generated and styled HTML.
     '''
+
+    # Preprocessing leaves a sentinel to work around
+    # https://github.com/jgm/pandoc/issues/7398, and so we need to remove it:
+    html = html.replace('</a> -PANDOC_BUG_7398-&gt;', '</a>&gt;')
     return html
 
 
     return html
 
 
@@ -296,14 +304,19 @@ def convert_markdown_to_html(mdwn):
     if body:
         body = _preprocess_markdown(body)
         body = _identify_quotes_for_later(body)
     if body:
         body = _preprocess_markdown(body)
         body = _identify_quotes_for_later(body)
-        html = _convert_with_pandoc(body, standalone=True, selfcontained=True)
+        html = _convert_with_pandoc(body, standalone=True, selfcontained=True,
+                                    title=None)
+        html = html.replace('<title>Untitled</title>\n','')
         html = _reformat_quotes(html)
 
     if sig:
         html = _reformat_quotes(html)
 
     if sig:
+        sig = _preprocess_signature(sig)
         sig = _preprocess_markdown(sig)
         sig = _preprocess_markdown(sig)
-        html += SIGNATURE_HTML.format(sig='<br/>'.join(sig.splitlines()))
+        sig = _convert_with_pandoc(sig, standalone=False, selfcontained=False)
+        sig = SIGNATURE_HTML.format(sig='<br/>'.join(sig.splitlines()))
+        eob = html.find('</body>')
+        html = f'{html[:eob]}{sig}\n{html[eob:]}'
 
 
-    html = HTML_DOCUMENT.format(htmlbody=html)
     html = _apply_styling(html)
     html = _postprocess_html(html)
 
     html = _apply_styling(html)
     html = _postprocess_html(html)
 
mutt configuration

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