From b3816a9fd256fa7df25edd46a451ae1cf3756aa1 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 6 Mar 2020 12:01:33 +0100
Subject: widgets/thread: improve rendering message source

Also, stop accessing the email directly.
---
 alot/widgets/thread.py | 63 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 39 insertions(+), 24 deletions(-)

(limited to 'alot/widgets')

diff --git a/alot/widgets/thread.py b/alot/widgets/thread.py
index dcbbd9da..8f771590 100644
--- a/alot/widgets/thread.py
+++ b/alot/widgets/thread.py
@@ -12,7 +12,6 @@ from .globals import TagWidget
 from .globals import AttachmentWidget
 from ..settings.const import settings
 from ..db.message import X_SIGNATURE_MESSAGE_HEADER
-from ..helper import string_sanitize
 
 class MessageSummaryWidget(urwid.WidgetWrap):
     """
@@ -72,21 +71,6 @@ class MessageSummaryWidget(urwid.WidgetWrap):
     def keypress(self, size, key):
         return key
 
-
-class FocusableText(urwid.WidgetWrap):
-    """Selectable Text used for nodes in our example"""
-    def __init__(self, txt, att, att_focus):
-        t = urwid.Text(txt)
-        w = urwid.AttrMap(t, att, att_focus)
-        super().__init__(w)
-
-    def selectable(self):
-        return True
-
-    def keypress(self, size, key):
-        return key
-
-
 class HeadersWidget(urwid.WidgetWrap):
     """
     A flow widget displaying message headers.
@@ -131,6 +115,44 @@ class HeadersWidget(urwid.WidgetWrap):
 
         self._w.contents = [(w, ('pack', None)) for w in widgets]
 
+def _make_ascii_trans():
+    trans = {
+        0x09 : ' ' * 8,         # tab
+        0x0b : '<\\v>\n',       # vertical tab
+        0x0c : '<\\f>\n',       # form feed
+        0x0d : '',              # carriage return
+    }
+    for i in range(256):
+        if (i >= 0x20 and i <= 0x7e) or i == 0x0a:
+            # printables and \n
+            trans[i] = chr(i)
+        elif not i in trans:
+            trans[i] = r'<\x%x>' % i
+
+    return trans
+
+_ascii_trans = _make_ascii_trans()
+
+def _ascii_to_printable(data):
+    """
+    Prepare ASCII data for printing.
+
+    :param data: input data
+    :type data: bytes
+    :returns: Data suitable for printing. It will contain only printable
+        characters (U+0020-U+007E) and a newline (U+000A).
+    :rtype: str
+    """
+    return data.decode('latin1').translate(_ascii_trans)
+
+class _RawMessageWidget(urwid.WidgetWrap):
+    """
+    A flow widget displaying the "raw" message.
+    """
+    def __init__(self, msg_bytes):
+        sourcetxt = _ascii_to_printable(msg_bytes)
+        super().__init__(urwid.Text(sourcetxt))
+
 class MessageWidget(urwid.WidgetWrap):
     """
     A flow widget displaying the contents of a single :class:`alot.db.Message`.
@@ -157,7 +179,7 @@ class MessageWidget(urwid.WidgetWrap):
         self._message       = message
 
         self._headers_wgt = self._get_headers()
-        self._source_wgt  = self._get_source()
+        self._source_wgt  = _RawMessageWidget(message.as_bytes())
         self._body_wgt    = self._get_body()
         self._attach_wgt  = self._get_attachments()
 
@@ -184,13 +206,6 @@ class MessageWidget(urwid.WidgetWrap):
 
         self._w.body[:] = widgets
 
-    def _get_source(self):
-        sourcetxt = self._message.get_email().as_string()
-        sourcetxt = string_sanitize(sourcetxt)
-        att = settings.get_theming_attribute('thread', 'body')
-        att_focus = settings.get_theming_attribute('thread', 'body_focus')
-        return FocusableText(sourcetxt, att, att_focus)
-
     def _get_body(self):
         attr_body   = settings.get_theming_attribute('thread', 'body')
         attrs_quote = settings.get_quote_theming()
-- 
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