tidy up print methods and switch to slimerjs for rendering pdf

screenless/bureau/bureau.py

@@ -6,6 +6,7 @@ import json
 import os.path
 import subprocess
 import tempfile
+import textwrap
 import threading
 import time
 
@@ -67,11 +68,10 @@ class Bureau(object):
         self.api = {}
 
         modpath = os.path.dirname(__file__)
-        phantomjs = os.path.join(modpath, "..", "lib", "phantomjs", "bin",
-                                "phantomjs")
+        slimerjs = os.path.join(modpath, "..", "lib", "slimerjs", "slimerjs")
         renderer = os.path.join(modpath, "..", "lib", "rasterize.js")
-        self.phantomjs = os.path.abspath(phantomjs)
-        self.html2pdf = self.phantomjs + " " + os.path.abspath(renderer) + " "
+        self.slimerjs = os.path.abspath(slimerjs)
+        self.html2pdf = self.slimerjs + " " + os.path.abspath(renderer) + " "
         mypath = inspect.getfile(self.__class__)
         self.mdir = os.path.dirname(mypath)
 
@@ -125,7 +125,10 @@ class Bureau(object):
             if len(resp) == 0:
                 return None
             elif resp[0] == "0":
-                return json.loads(resp[1:])
+                if len(resp) == 1:
+                    return None
+                else:
+                    return json.loads(resp[1:])
             else:
                 # TODO: this may need some better error handling
                 return resp
@@ -213,15 +216,16 @@ class Bureau(object):
         print("rendering with: ", self.html2pdf + htmlpath + " " + pdfpath)
         subprocess.call(self.html2pdf + htmlpath + " " + pdfpath +
                         " A4 1920px", shell=True)
-        #subprocess.call("lpr " + pdfpath, shell=True)
+        subprocess.call("lpr " + pdfpath, shell=True)
 
     # TODO: make this asynchronous
     def print_small(self, text, printer="/dev/usb/lp0"):
         """
         print on Thermal Line printer.
         """
-        # TODO: look this up in config
+        # TODO: look up device and width in config
         lp = open(printer, "w")
+        text = textwrap.fill(text, width=32)
         text += "\r\n" * 5 
         # text += ".d0"
         lp.write(text)