gitview: Fix the blame interface.

The async reading from the pipe was skipping some of the
input lines. Fix the same by making sure that we add the
partial content of the previous read to the newly read
data.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/gitview/gitview

@@ -352,6 +352,7 @@ class AnnotateWindow(object):
 		self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
 		self.window.set_border_width(0)
 		self.window.set_title("Git repository browser annotation window")
+		self.prev_read = ""
 
 		# Use two thirds of the screen by default
 		screen = self.window.get_screen()
@@ -401,7 +402,10 @@ class AnnotateWindow(object):
 	def data_ready(self, source, condition):
 		while (1):
 			try :
-				buffer = source.read(8192)
+				# A simple readline doesn't work
+				# a readline bug ??
+				buffer = source.read(100)
+
 			except:
 				# resource temporary not available
 				return True
@@ -411,6 +415,19 @@ class AnnotateWindow(object):
 				source.close()
 				return False
 
+			if (self.prev_read != ""):
+				buffer = self.prev_read + buffer
+				self.prev_read = ""
+
+			if (buffer[len(buffer) -1] != '\n'):
+				try:
+					newline_index = buffer.rindex("\n")
+				except ValueError:
+					newline_index = 0
+
+				self.prev_read = buffer[newline_index:(len(buffer))]
+				buffer = buffer[0:newline_index]
+
 			for buff in buffer.split("\n"):
 				annotate_line = re.compile('^([0-9a-f]{40}) (.+) (.+) (.+)$')
 				m = annotate_line.match(buff)