fixed centering/visibility bug

--HG--
branch : pmacs2

application.py

@@ -921,8 +921,10 @@ class Application(object):
         # figure out which "physical line" is the first to be shown. note that
         # the cursor shouldn't be in the last column unless it's the end of a
         # line.
+
         k = x // swidth
-        #if x < len(lines[y]) and x == swidth - 1:
+
+        #if x < len(lines[y]) and x == swidth - 1: #xyz
         #    k += 1
 
         while count < slot.height:

window.py

@@ -218,20 +218,27 @@ class Window(object):
         return self.point_is_visible(self.buffer.get_buffer_end())
         
     def center_view(self, force=False):
-        (x, y) = self.logical_cursor().xy()
+        x, y = self.logical_cursor().xy()
         counter = 0
         while counter < self.height / 2:
             if x > self.width:
-                d = x % self.width
                 x -= self.width
             elif y > 0:
                 y -= 1
                 x = len(self.buffer.lines[y])
             else:
-                (x, y) = (0, 0)
+                x, y = 0, 0
                 break
             counter += 1
-        x -= (x % self.width)
+
+        # trim off the slop
+        x = x - (x % self.width)
+
+        # in this case, the line is a multiple of width, and there is nothing
+        # (besides a newline) to display on the "next" line, so we should
+        # reduce the wrapping by one line.
+        if x >= self.width and x == len(self.buffer.lines[y]):
+            x -= self.width
 
         # make sure we aren't "centering" on the end of the file (where half the
         # screen is empty). that is, unless that's what the user wants