From fbdc7dce60987dc0833a0db031f6dca4f1e1fddc Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 17 Feb 2020 17:45:22 +0100
Subject: widgets/thread: add theming for quote lines in message body

---
 alot/widgets/thread.py | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

(limited to 'alot/widgets/thread.py')

diff --git a/alot/widgets/thread.py b/alot/widgets/thread.py
index ed2b5ac6..1954d84d 100644
--- a/alot/widgets/thread.py
+++ b/alot/widgets/thread.py
@@ -5,6 +5,7 @@
 Widgets specific to thread mode
 """
 import logging
+import re
 import urwid
 
 from .globals import TagWidget
@@ -150,6 +151,9 @@ class MessageWidget(urwid.WidgetWrap):
     _body_wgt    = None
     _attach_wgt  = None
 
+    _QUOTE_CHARS = '>|:}#'
+    _QUOTE_REGEX = '(([ \t]*[{quote_chars}])+)'.format(quote_chars = _QUOTE_CHARS)
+
     def __init__(self, message, odd):
         """
         :param message: Message to display
@@ -200,11 +204,32 @@ class MessageWidget(urwid.WidgetWrap):
         return FocusableText(sourcetxt, att, att_focus)
 
     def _get_body(self):
-        bodytxt = self._message.get_body_text()
-        att = settings.get_theming_attribute('thread', 'body')
-        att_focus = settings.get_theming_attribute(
-            'thread', 'body_focus')
-        return FocusableText(bodytxt, att, att_focus)
+        attr_body   = settings.get_theming_attribute('thread', 'body')
+        attrs_quote = settings.get_quote_theming()
+
+        body_lines = self._message.get_body_text().splitlines()
+
+        quote_levels = []
+        for line in body_lines:
+            level = 0
+            m = re.match(self._QUOTE_REGEX, line)
+            if m is not None:
+                g = m.group(0)
+                for c in self._QUOTE_CHARS:
+                    level += g.count(c)
+
+            quote_levels.append(level)
+
+        line_widgets = []
+
+        for level, line in zip(quote_levels, body_lines):
+            if level == 0 or len(attrs_quote) < 1:
+                attr = attr_body
+            else:
+                attr = attrs_quote[(level - 1) % len(attrs_quote)]
+            line_widgets.append(urwid.Text((attr, line)))
+
+        return urwid.Pile(line_widgets)
 
     def _get_headers(self):
         key_attr   = settings.get_theming_attribute('thread', 'header_key')
-- 
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