nicer linewrap algo for the small printer

screenless/bureau/bureau.py

@@ -8,11 +8,11 @@ import json
 import logging
 import os.path
 import random
+import re
 import shutil
 import string
 import subprocess
 import tempfile
-import textwrap
 import threading
 
 import lmdb
@@ -93,9 +93,12 @@ class LogPrinter(logging.Handler):
                               in_ep=self.printer["inep"],
                               out_ep=self.printer["outep"])
         msg = self.format(record)
-        text = textwrap.fill(msg, width=self.printer["textwidth"])
-        text += "\r\n" * 4
-        prn.text(text)
+        #text = textwrap.fill(msg, width=self.printer["textwidth"])
+        spliter_regex = r'.{1,' + self.printer["textwidth"] + '}(?:\s+|$)'
+        out_text = "\r\n".join(line.strip() for line in 
+                               re.findall(spliter_regex, text)))
+        out_text += "\r\n" * 4
+        prn.text(out_text)
         prn.cut()
 
 
@@ -437,18 +440,22 @@ class Bureau(object):
                         + pdfpath, shell=True)
 
     # TODO: make this asynchronous
-    def print_small(self, text, cut=True):
+    def print_small(self, text, cut=True, linefeed=True):
         """
         print on Thermal Line printer.
         """
         prn = self._get_small_printer()
-        text = "\r\n" + textwrap.fill(text, width=self.smprint["textwidth"])
-        text += "\r\n" * 2
-        prn.text(text + "\r\n\r\n")
+
+        spliter_regex = r'.{1,' + self.printer["textwidth"] + '}(?:\s+|$)'
+        out_text = "\r\n".join(line.strip() for line in re.findall(splitter_regex, text)))
+
+        prn.text(out_text + "\r\n")
+        if linefeed:
+            prn.text("\r\n\r\n")
         if cut:
             prn.cut()
 
-    def print_small_image(self, img):
+    def print_small_image(self, img, linefeed=True):
         """
         print an image on the mini thermal printer.
         """
@@ -465,6 +472,8 @@ class Bureau(object):
         im.thumbnail((self.smprint["width"], 1024), PIL.Image.ANTIALIAS)  
         # not using this bitImageColumn crashes some printers, sigh
         prn.image(im, impl="bitImageColumn")  
+        if linefeed:
+            prn.text("\r\n")
 
     @add_command("test")
     def test(self, data=None):