better mutt/wrapping support

--HG--
branch : pmacs2

method/__init__.py

@@ -787,8 +787,6 @@ class WrapParagraph(WrapLine):
         w.goto(Point(x, y))
 class WrapParagraph2(Method):
     limit     = 80
-    wrapper   = WrapLine
-    spacer    = InsertSpace
     empty_re  = regex.whitespace
     prefix_re = None
     def _execute(self, w, **vargs):
@@ -855,11 +853,16 @@ class WrapParagraph2(Method):
         # translate our cursor according to the line breaks we just did.
         (x, y) = oldc.xy()
         k = 0
-        while x > len(newlines[k]):
+        while k < len(newlines) and x > len(newlines[k]):
             x = x - len(newlines[k]) - 1
             y += 1
             k += 1
-        #raise Exception, (x, y)
+
+        # if our cursor is on a new line (past all the newlines) then we should
+        # be inserting another line so that we preserve the spacing of the
+        # document.
+        if k == len(newlines):
+            newlines.append('')
 
         # kill the old paragraph region, insert the new, and goto the new cursor
         w.kill(p1, Point(len(w.buffer.lines[i-1]), i-1))

mode/mutt.py

@@ -43,10 +43,10 @@ class Mutt(mode.Fundamental):
 class MuttWrapLine(method.WrapLine):
     limit = 72
 
-#class MuttWrapParagraph(method.WrapParagraph):
 class MuttWrapParagraph(method.WrapParagraph2):
     wrapper  = MuttWrapLine
-    empty_re = re.compile('^[ >\n]*$')
+    limit    = 72
+    empty_re = re.compile('^(?: *>.*| *)$')
 
 class MuttInsertSpace(mode.text.TextInsertSpace):
     limit   = 72