922 lines
31 KiB
Python
922 lines
31 KiB
Python
# -*- coding: utf-8 -*-
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import base64
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import copy
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import io
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import math
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import md5
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import re
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import traceback
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import xml.etree.ElementTree as ET
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from PIL import Image
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try:
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import jcconv
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except ImportError:
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jcconv = None
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try:
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import qrcode
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except ImportError:
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qrcode = None
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from constants import *
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from exceptions import *
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def utfstr(stuff):
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""" converts stuff to string and does without failing if stuff is a utf8 string """
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if isinstance(stuff,basestring):
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return stuff
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else:
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return str(stuff)
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class StyleStack:
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"""
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The stylestack is used by the xml receipt serializer to compute the active styles along the xml
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document. Styles are just xml attributes, there is no css mechanism. But the style applied by
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the attributes are inherited by deeper nodes.
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"""
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def __init__(self):
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self.stack = []
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self.defaults = { # default style values
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'align': 'left',
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'underline': 'off',
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'bold': 'off',
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'size': 'normal',
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'font' : 'a',
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'width': 48,
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'indent': 0,
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'tabwidth': 2,
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'bullet': ' - ',
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'line-ratio':0.5,
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'color': 'black',
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'value-decimals': 2,
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'value-symbol': '',
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'value-symbol-position': 'after',
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'value-autoint': 'off',
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'value-decimals-separator': '.',
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'value-thousands-separator': ',',
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'value-width': 0,
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}
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self.types = { # attribute types, default is string and can be ommitted
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'width': 'int',
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'indent': 'int',
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'tabwidth': 'int',
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'line-ratio': 'float',
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'value-decimals': 'int',
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'value-width': 'int',
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}
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self.cmds = {
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# translation from styles to escpos commands
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# some style do not correspond to escpos command are used by
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# the serializer instead
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'align': {
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'left': TXT_ALIGN_LT,
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'right': TXT_ALIGN_RT,
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'center': TXT_ALIGN_CT,
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'_order': 1,
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},
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'underline': {
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'off': TXT_UNDERL_OFF,
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'on': TXT_UNDERL_ON,
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'double': TXT_UNDERL2_ON,
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# must be issued after 'size' command
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# because ESC ! resets ESC -
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'_order': 10,
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},
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'bold': {
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'off': TXT_BOLD_OFF,
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'on': TXT_BOLD_ON,
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# must be issued after 'size' command
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# because ESC ! resets ESC -
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'_order': 10,
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},
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'font': {
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'a': TXT_FONT_A,
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'b': TXT_FONT_B,
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# must be issued after 'size' command
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# because ESC ! resets ESC -
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'_order': 10,
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},
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'size': {
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'normal': TXT_NORMAL,
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'double-height': TXT_2HEIGHT,
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'double-width': TXT_2WIDTH,
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'double': TXT_DOUBLE,
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'_order': 1,
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},
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'color': {
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'black': TXT_COLOR_BLACK,
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'red': TXT_COLOR_RED,
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'_order': 1,
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},
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}
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self.push(self.defaults)
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def get(self,style):
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""" what's the value of a style at the current stack level"""
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level = len(self.stack) -1
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while level >= 0:
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if style in self.stack[level]:
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return self.stack[level][style]
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else:
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level = level - 1
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return None
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def enforce_type(self, attr, val):
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"""converts a value to the attribute's type"""
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if not attr in self.types:
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return utfstr(val)
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elif self.types[attr] == 'int':
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return int(float(val))
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elif self.types[attr] == 'float':
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return float(val)
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else:
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return utfstr(val)
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def push(self, style={}):
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"""push a new level on the stack with a style dictionnary containing style:value pairs"""
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_style = {}
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for attr in style:
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if attr in self.cmds and not style[attr] in self.cmds[attr]:
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print 'WARNING: ESC/POS PRINTING: ignoring invalid value: '+utfstr(style[attr])+' for style: '+utfstr(attr)
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else:
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_style[attr] = self.enforce_type(attr, style[attr])
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self.stack.append(_style)
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def set(self, style={}):
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"""overrides style values at the current stack level"""
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_style = {}
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for attr in style:
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if attr in self.cmds and not style[attr] in self.cmds[attr]:
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print 'WARNING: ESC/POS PRINTING: ignoring invalid value: '+utfstr(style[attr])+' for style: '+utfstr(attr)
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else:
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self.stack[-1][attr] = self.enforce_type(attr, style[attr])
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def pop(self):
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""" pop a style stack level """
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if len(self.stack) > 1 :
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self.stack = self.stack[:-1]
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def to_escpos(self):
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""" converts the current style to an escpos command string """
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cmd = ''
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ordered_cmds = self.cmds.keys()
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ordered_cmds.sort(lambda x,y: cmp(self.cmds[x]['_order'], self.cmds[y]['_order']))
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for style in ordered_cmds:
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cmd += self.cmds[style][self.get(style)]
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return cmd
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class XmlSerializer:
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"""
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Converts the xml inline / block tree structure to a string,
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keeping track of newlines and spacings.
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The string is outputted asap to the provided escpos driver.
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"""
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def __init__(self,escpos):
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self.escpos = escpos
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self.stack = ['block']
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self.dirty = False
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def start_inline(self,stylestack=None):
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""" starts an inline entity with an optional style definition """
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self.stack.append('inline')
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if self.dirty:
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self.escpos._raw(' ')
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if stylestack:
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self.style(stylestack)
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def start_block(self,stylestack=None):
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""" starts a block entity with an optional style definition """
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if self.dirty:
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self.escpos._raw('\n')
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self.dirty = False
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self.stack.append('block')
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if stylestack:
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self.style(stylestack)
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def end_entity(self):
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""" ends the entity definition. (but does not cancel the active style!) """
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if self.stack[-1] == 'block' and self.dirty:
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self.escpos._raw('\n')
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self.dirty = False
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if len(self.stack) > 1:
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self.stack = self.stack[:-1]
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def pre(self,text):
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""" puts a string of text in the entity keeping the whitespace intact """
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if text:
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self.escpos.text(text)
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self.dirty = True
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def text(self,text):
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""" puts text in the entity. Whitespace and newlines are stripped to single spaces. """
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if text:
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text = utfstr(text)
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text = text.strip()
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text = re.sub('\s+',' ',text)
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if text:
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self.dirty = True
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self.escpos.text(text)
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def linebreak(self):
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""" inserts a linebreak in the entity """
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self.dirty = False
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self.escpos._raw('\n')
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def style(self,stylestack):
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""" apply a style to the entity (only applies to content added after the definition) """
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self.raw(stylestack.to_escpos())
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def raw(self,raw):
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""" puts raw text or escpos command in the entity without affecting the state of the serializer """
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self.escpos._raw(raw)
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class XmlLineSerializer:
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"""
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This is used to convert a xml tree into a single line, with a left and a right part.
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The content is not output to escpos directly, and is intended to be fedback to the
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XmlSerializer as the content of a block entity.
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"""
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def __init__(self, indent=0, tabwidth=2, width=48, ratio=0.5):
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self.tabwidth = tabwidth
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self.indent = indent
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self.width = max(0, width - int(tabwidth*indent))
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self.lwidth = int(self.width*ratio)
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self.rwidth = max(0, self.width - self.lwidth)
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self.clwidth = 0
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self.crwidth = 0
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self.lbuffer = ''
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self.rbuffer = ''
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self.left = True
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def _txt(self,txt):
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if self.left:
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if self.clwidth < self.lwidth:
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txt = txt[:max(0, self.lwidth - self.clwidth)]
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self.lbuffer += txt
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self.clwidth += len(txt)
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else:
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if self.crwidth < self.rwidth:
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txt = txt[:max(0, self.rwidth - self.crwidth)]
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self.rbuffer += txt
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self.crwidth += len(txt)
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def start_inline(self,stylestack=None):
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if (self.left and self.clwidth) or (not self.left and self.crwidth):
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self._txt(' ')
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def start_block(self,stylestack=None):
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self.start_inline(stylestack)
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def end_entity(self):
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pass
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def pre(self,text):
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if text:
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self._txt(text)
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def text(self,text):
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if text:
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text = utfstr(text)
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text = text.strip()
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text = re.sub('\s+',' ',text)
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if text:
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self._txt(text)
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def linebreak(self):
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pass
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def style(self,stylestack):
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pass
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def raw(self,raw):
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pass
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def start_right(self):
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self.left = False
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def get_line(self):
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return ' ' * self.indent * self.tabwidth + self.lbuffer + ' ' * (self.width - self.clwidth - self.crwidth) + self.rbuffer
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class Escpos:
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""" ESC/POS Printer object """
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device = None
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encoding = None
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img_cache = {}
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def _check_image_size(self, size):
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""" Check and fix the size of the image to 32 bits """
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if size % 32 == 0:
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return (0, 0)
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else:
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image_border = 32 - (size % 32)
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if (image_border % 2) == 0:
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return (image_border / 2, image_border / 2)
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else:
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return (image_border / 2, (image_border / 2) + 1)
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def _print_image(self, line, size):
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""" Print formatted image """
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i = 0
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cont = 0
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buffer = ""
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self._raw(S_RASTER_N)
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buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1], 0)
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self._raw(buffer.decode('hex'))
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buffer = ""
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while i < len(line):
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hex_string = int(line[i:i+8],2)
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buffer += "%02X" % hex_string
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i += 8
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cont += 1
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if cont % 4 == 0:
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self._raw(buffer.decode("hex"))
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buffer = ""
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cont = 0
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def _raw_print_image(self, line, size, output=None ):
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""" Print formatted image """
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i = 0
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cont = 0
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buffer = ""
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raw = ""
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def __raw(string):
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if output:
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output(string)
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else:
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self._raw(string)
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raw += S_RASTER_N
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buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1], 0)
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raw += buffer.decode('hex')
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buffer = ""
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while i < len(line):
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hex_string = int(line[i:i+8],2)
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buffer += "%02X" % hex_string
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i += 8
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cont += 1
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if cont % 4 == 0:
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raw += buffer.decode("hex")
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buffer = ""
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cont = 0
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return raw
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def _convert_image(self, im):
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""" Parse image and prepare it to a printable format """
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pixels = []
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pix_line = ""
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im_left = ""
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im_right = ""
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switch = 0
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img_size = [ 0, 0 ]
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if im.size[0] > 512:
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print "WARNING: Image is wider than 512 and could be truncated at print time "
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if im.size[1] > 255:
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raise ImageSizeError()
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im_border = self._check_image_size(im.size[0])
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for i in range(im_border[0]):
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im_left += "0"
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for i in range(im_border[1]):
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im_right += "0"
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for y in range(im.size[1]):
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img_size[1] += 1
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pix_line += im_left
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img_size[0] += im_border[0]
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for x in range(im.size[0]):
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img_size[0] += 1
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RGB = im.getpixel((x, y))
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im_color = (RGB[0] + RGB[1] + RGB[2])
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im_pattern = "1X0"
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pattern_len = len(im_pattern)
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switch = (switch - 1 ) * (-1)
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for x in range(pattern_len):
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if im_color <= (255 * 3 / pattern_len * (x+1)):
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if im_pattern[x] == "X":
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pix_line += "%d" % switch
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else:
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pix_line += im_pattern[x]
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break
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elif im_color > (255 * 3 / pattern_len * pattern_len) and im_color <= (255 * 3):
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pix_line += im_pattern[-1]
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break
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pix_line += im_right
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img_size[0] += im_border[1]
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return (pix_line, img_size)
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def image(self,path_img):
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""" Open image file """
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im_open = Image.open(path_img)
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im = im_open.convert("RGB")
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# Convert the RGB image in printable image
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pix_line, img_size = self._convert_image(im)
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self._print_image(pix_line, img_size)
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def print_base64_image(self,img):
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print 'print_b64_img'
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id = md5.new(img).digest()
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if id not in self.img_cache:
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print 'not in cache'
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img = img[img.find(',')+1:]
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f = io.BytesIO('img')
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f.write(base64.decodestring(img))
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f.seek(0)
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img_rgba = Image.open(f)
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img = Image.new('RGB', img_rgba.size, (255,255,255))
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channels = img_rgba.split()
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if len(channels) > 3:
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# use alpha channel as mask
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img.paste(img_rgba, mask=channels[3])
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else:
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img.paste(img_rgba)
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print 'convert image'
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pix_line, img_size = self._convert_image(img)
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print 'print image'
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buffer = self._raw_print_image(pix_line, img_size)
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self.img_cache[id] = buffer
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print 'raw image'
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self._raw(self.img_cache[id])
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def qr(self,text):
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""" Print QR Code for the provided string """
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qr_code = qrcode.QRCode(version=4, box_size=4, border=1)
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qr_code.add_data(text)
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qr_code.make(fit=True)
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qr_img = qr_code.make_image()
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im = qr_img._img.convert("RGB")
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# Convert the RGB image in printable image
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self._convert_image(im)
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def barcode(self, code, bc, width=255, height=2, pos='below', font='a'):
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""" Print Barcode """
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# Align Bar Code()
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self._raw(TXT_ALIGN_CT)
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# Height
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if height >=2 or height <=6:
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self._raw(BARCODE_HEIGHT)
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else:
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raise BarcodeSizeError()
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# Width
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if width >= 1 or width <=255:
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self._raw(BARCODE_WIDTH)
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else:
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raise BarcodeSizeError()
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# Font
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if font.upper() == "B":
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self._raw(BARCODE_FONT_B)
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else: # DEFAULT FONT: A
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self._raw(BARCODE_FONT_A)
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# Position
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if pos.upper() == "OFF":
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self._raw(BARCODE_TXT_OFF)
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elif pos.upper() == "BOTH":
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self._raw(BARCODE_TXT_BTH)
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elif pos.upper() == "ABOVE":
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self._raw(BARCODE_TXT_ABV)
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else: # DEFAULT POSITION: BELOW
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self._raw(BARCODE_TXT_BLW)
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# Type
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if bc.upper() == "UPC-A":
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self._raw(BARCODE_UPC_A)
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elif bc.upper() == "UPC-E":
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self._raw(BARCODE_UPC_E)
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elif bc.upper() == "EAN13":
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self._raw(BARCODE_EAN13)
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elif bc.upper() == "EAN8":
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self._raw(BARCODE_EAN8)
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elif bc.upper() == "CODE39":
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self._raw(BARCODE_CODE39)
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elif bc.upper() == "ITF":
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self._raw(BARCODE_ITF)
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elif bc.upper() == "NW7":
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self._raw(BARCODE_NW7)
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else:
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raise BarcodeTypeError()
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# Print Code
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if code:
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self._raw(code)
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# We are using type A commands
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# So we need to add the 'NULL' character
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|
# https://github.com/python-escpos/python-escpos/pull/98/files#diff-a0b1df12c7c67e38915adbe469051e2dR444
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self._raw('\x00')
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else:
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raise exception.BarcodeCodeError()
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|
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def receipt(self,xml):
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"""
|
|
Prints an xml based receipt definition
|
|
"""
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|
|
def strclean(string):
|
|
if not string:
|
|
string = ''
|
|
string = string.strip()
|
|
string = re.sub('\s+',' ',string)
|
|
return string
|
|
|
|
def format_value(value, decimals=3, width=0, decimals_separator='.', thousands_separator=',', autoint=False, symbol='', position='after'):
|
|
decimals = max(0,int(decimals))
|
|
width = max(0,int(width))
|
|
value = float(value)
|
|
|
|
if autoint and math.floor(value) == value:
|
|
decimals = 0
|
|
if width == 0:
|
|
width = ''
|
|
|
|
if thousands_separator:
|
|
formatstr = "{:"+str(width)+",."+str(decimals)+"f}"
|
|
else:
|
|
formatstr = "{:"+str(width)+"."+str(decimals)+"f}"
|
|
|
|
|
|
ret = formatstr.format(value)
|
|
ret = ret.replace(',','COMMA')
|
|
ret = ret.replace('.','DOT')
|
|
ret = ret.replace('COMMA',thousands_separator)
|
|
ret = ret.replace('DOT',decimals_separator)
|
|
|
|
if symbol:
|
|
if position == 'after':
|
|
ret = ret + symbol
|
|
else:
|
|
ret = symbol + ret
|
|
return ret
|
|
|
|
def print_elem(stylestack, serializer, elem, indent=0):
|
|
|
|
elem_styles = {
|
|
'h1': {'bold': 'on', 'size':'double'},
|
|
'h2': {'size':'double'},
|
|
'h3': {'bold': 'on', 'size':'double-height'},
|
|
'h4': {'size': 'double-height'},
|
|
'h5': {'bold': 'on'},
|
|
'em': {'font': 'b'},
|
|
'b': {'bold': 'on'},
|
|
}
|
|
|
|
stylestack.push()
|
|
if elem.tag in elem_styles:
|
|
stylestack.set(elem_styles[elem.tag])
|
|
stylestack.set(elem.attrib)
|
|
|
|
if elem.tag in ('p','div','section','article','receipt','header','footer','li','h1','h2','h3','h4','h5'):
|
|
serializer.start_block(stylestack)
|
|
serializer.text(elem.text)
|
|
for child in elem:
|
|
print_elem(stylestack,serializer,child)
|
|
serializer.start_inline(stylestack)
|
|
serializer.text(child.tail)
|
|
serializer.end_entity()
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag in ('span','em','b','left','right'):
|
|
serializer.start_inline(stylestack)
|
|
serializer.text(elem.text)
|
|
for child in elem:
|
|
print_elem(stylestack,serializer,child)
|
|
serializer.start_inline(stylestack)
|
|
serializer.text(child.tail)
|
|
serializer.end_entity()
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'value':
|
|
serializer.start_inline(stylestack)
|
|
serializer.pre(format_value(
|
|
elem.text,
|
|
decimals=stylestack.get('value-decimals'),
|
|
width=stylestack.get('value-width'),
|
|
decimals_separator=stylestack.get('value-decimals-separator'),
|
|
thousands_separator=stylestack.get('value-thousands-separator'),
|
|
autoint=(stylestack.get('value-autoint') == 'on'),
|
|
symbol=stylestack.get('value-symbol'),
|
|
position=stylestack.get('value-symbol-position')
|
|
))
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'line':
|
|
width = stylestack.get('width')
|
|
if stylestack.get('size') in ('double', 'double-width'):
|
|
width = width / 2
|
|
|
|
lineserializer = XmlLineSerializer(stylestack.get('indent')+indent,stylestack.get('tabwidth'),width,stylestack.get('line-ratio'))
|
|
serializer.start_block(stylestack)
|
|
for child in elem:
|
|
if child.tag == 'left':
|
|
print_elem(stylestack,lineserializer,child,indent=indent)
|
|
elif child.tag == 'right':
|
|
lineserializer.start_right()
|
|
print_elem(stylestack,lineserializer,child,indent=indent)
|
|
serializer.pre(lineserializer.get_line())
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'ul':
|
|
serializer.start_block(stylestack)
|
|
bullet = stylestack.get('bullet')
|
|
for child in elem:
|
|
if child.tag == 'li':
|
|
serializer.style(stylestack)
|
|
serializer.raw(' ' * indent * stylestack.get('tabwidth') + bullet)
|
|
print_elem(stylestack,serializer,child,indent=indent+1)
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'ol':
|
|
cwidth = len(str(len(elem))) + 2
|
|
i = 1
|
|
serializer.start_block(stylestack)
|
|
for child in elem:
|
|
if child.tag == 'li':
|
|
serializer.style(stylestack)
|
|
serializer.raw(' ' * indent * stylestack.get('tabwidth') + ' ' + (str(i)+')').ljust(cwidth))
|
|
i = i + 1
|
|
print_elem(stylestack,serializer,child,indent=indent+1)
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'pre':
|
|
serializer.start_block(stylestack)
|
|
serializer.pre(elem.text)
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'hr':
|
|
width = stylestack.get('width')
|
|
if stylestack.get('size') in ('double', 'double-width'):
|
|
width = width / 2
|
|
serializer.start_block(stylestack)
|
|
serializer.text('-'*width)
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'br':
|
|
serializer.linebreak()
|
|
|
|
elif elem.tag == 'img':
|
|
if 'src' in elem.attrib and 'data:' in elem.attrib['src']:
|
|
self.print_base64_image(elem.attrib['src'])
|
|
|
|
elif elem.tag == 'barcode' and 'encoding' in elem.attrib:
|
|
serializer.start_block(stylestack)
|
|
self.barcode(strclean(elem.text),elem.attrib['encoding'])
|
|
serializer.end_entity()
|
|
|
|
elif elem.tag == 'cut':
|
|
self.cut()
|
|
elif elem.tag == 'partialcut':
|
|
self.cut(mode='part')
|
|
elif elem.tag == 'cashdraw':
|
|
self.cashdraw(2)
|
|
self.cashdraw(5)
|
|
|
|
stylestack.pop()
|
|
|
|
try:
|
|
stylestack = StyleStack()
|
|
serializer = XmlSerializer(self)
|
|
root = ET.fromstring(xml.encode('utf-8'))
|
|
|
|
self._raw(stylestack.to_escpos())
|
|
|
|
print_elem(stylestack,serializer,root)
|
|
|
|
if 'open-cashdrawer' in root.attrib and root.attrib['open-cashdrawer'] == 'true':
|
|
self.cashdraw(2)
|
|
self.cashdraw(5)
|
|
if not 'cut' in root.attrib or root.attrib['cut'] == 'true' :
|
|
self.cut()
|
|
|
|
except Exception as e:
|
|
errmsg = str(e)+'\n'+'-'*48+'\n'+traceback.format_exc() + '-'*48+'\n'
|
|
self.text(errmsg)
|
|
self.cut()
|
|
|
|
raise e
|
|
|
|
def text(self,txt):
|
|
""" Print Utf8 encoded alpha-numeric text """
|
|
if not txt:
|
|
return
|
|
try:
|
|
txt = txt.decode('utf-8')
|
|
except:
|
|
try:
|
|
txt = txt.decode('utf-16')
|
|
except:
|
|
pass
|
|
|
|
self.extra_chars = 0
|
|
|
|
def encode_char(char):
|
|
"""
|
|
Encodes a single utf-8 character into a sequence of
|
|
esc-pos code page change instructions and character declarations
|
|
"""
|
|
char_utf8 = char.encode('utf-8')
|
|
encoded = ''
|
|
encoding = self.encoding # we reuse the last encoding to prevent code page switches at every character
|
|
encodings = {
|
|
# TODO use ordering to prevent useless switches
|
|
# TODO Support other encodings not natively supported by python ( Thai, Khazakh, Kanjis )
|
|
'cp437': TXT_ENC_PC437,
|
|
'cp850': TXT_ENC_PC850,
|
|
'cp852': TXT_ENC_PC852,
|
|
'cp857': TXT_ENC_PC857,
|
|
'cp858': TXT_ENC_PC858,
|
|
'cp860': TXT_ENC_PC860,
|
|
'cp863': TXT_ENC_PC863,
|
|
'cp865': TXT_ENC_PC865,
|
|
'cp866': TXT_ENC_PC866,
|
|
'cp862': TXT_ENC_PC862,
|
|
'cp720': TXT_ENC_PC720,
|
|
'cp936': TXT_ENC_PC936,
|
|
'iso8859_2': TXT_ENC_8859_2,
|
|
'iso8859_7': TXT_ENC_8859_7,
|
|
'iso8859_9': TXT_ENC_8859_9,
|
|
'cp1254' : TXT_ENC_WPC1254,
|
|
'cp1255' : TXT_ENC_WPC1255,
|
|
'cp1256' : TXT_ENC_WPC1256,
|
|
'cp1257' : TXT_ENC_WPC1257,
|
|
'cp1258' : TXT_ENC_WPC1258,
|
|
'katakana' : TXT_ENC_KATAKANA,
|
|
}
|
|
remaining = copy.copy(encodings)
|
|
|
|
if not encoding :
|
|
encoding = 'cp437'
|
|
|
|
while True: # Trying all encoding until one succeeds
|
|
try:
|
|
if encoding == 'katakana': # Japanese characters
|
|
if jcconv:
|
|
# try to convert japanese text to a half-katakanas
|
|
kata = jcconv.kata2half(jcconv.hira2kata(char_utf8))
|
|
if kata != char_utf8:
|
|
self.extra_chars += len(kata.decode('utf-8')) - 1
|
|
# the conversion may result in multiple characters
|
|
return encode_str(kata.decode('utf-8'))
|
|
else:
|
|
kata = char_utf8
|
|
|
|
if kata in TXT_ENC_KATAKANA_MAP:
|
|
encoded = TXT_ENC_KATAKANA_MAP[kata]
|
|
break
|
|
else:
|
|
raise ValueError()
|
|
else:
|
|
encoded = char.encode(encoding)
|
|
break
|
|
|
|
except ValueError: #the encoding failed, select another one and retry
|
|
if encoding in remaining:
|
|
del remaining[encoding]
|
|
if len(remaining) >= 1:
|
|
encoding = remaining.items()[0][0]
|
|
else:
|
|
encoding = 'cp437'
|
|
encoded = '\xb1' # could not encode, output error character
|
|
break;
|
|
|
|
if encoding != self.encoding:
|
|
# if the encoding changed, remember it and prefix the character with
|
|
# the esc-pos encoding change sequence
|
|
self.encoding = encoding
|
|
encoded = encodings[encoding] + encoded
|
|
|
|
return encoded
|
|
|
|
def encode_str(txt):
|
|
buffer = ''
|
|
for c in txt:
|
|
buffer += encode_char(c)
|
|
return buffer
|
|
|
|
txt = encode_str(txt)
|
|
|
|
# if the utf-8 -> codepage conversion inserted extra characters,
|
|
# remove double spaces to try to restore the original string length
|
|
# and prevent printing alignment issues
|
|
while self.extra_chars > 0:
|
|
dspace = txt.find(' ')
|
|
if dspace > 0:
|
|
txt = txt[:dspace] + txt[dspace+1:]
|
|
self.extra_chars -= 1
|
|
else:
|
|
break
|
|
|
|
self._raw(txt)
|
|
|
|
def set(self, align='left', font='a', type='normal', width=1, height=1):
|
|
""" Set text properties """
|
|
# Align
|
|
if align.upper() == "CENTER":
|
|
self._raw(TXT_ALIGN_CT)
|
|
elif align.upper() == "RIGHT":
|
|
self._raw(TXT_ALIGN_RT)
|
|
elif align.upper() == "LEFT":
|
|
self._raw(TXT_ALIGN_LT)
|
|
# Font
|
|
if font.upper() == "B":
|
|
self._raw(TXT_FONT_B)
|
|
else: # DEFAULT FONT: A
|
|
self._raw(TXT_FONT_A)
|
|
# Type
|
|
if type.upper() == "B":
|
|
self._raw(TXT_BOLD_ON)
|
|
self._raw(TXT_UNDERL_OFF)
|
|
elif type.upper() == "U":
|
|
self._raw(TXT_BOLD_OFF)
|
|
self._raw(TXT_UNDERL_ON)
|
|
elif type.upper() == "U2":
|
|
self._raw(TXT_BOLD_OFF)
|
|
self._raw(TXT_UNDERL2_ON)
|
|
elif type.upper() == "BU":
|
|
self._raw(TXT_BOLD_ON)
|
|
self._raw(TXT_UNDERL_ON)
|
|
elif type.upper() == "BU2":
|
|
self._raw(TXT_BOLD_ON)
|
|
self._raw(TXT_UNDERL2_ON)
|
|
elif type.upper == "NORMAL":
|
|
self._raw(TXT_BOLD_OFF)
|
|
self._raw(TXT_UNDERL_OFF)
|
|
# Width
|
|
if width == 2 and height != 2:
|
|
self._raw(TXT_NORMAL)
|
|
self._raw(TXT_2WIDTH)
|
|
elif height == 2 and width != 2:
|
|
self._raw(TXT_NORMAL)
|
|
self._raw(TXT_2HEIGHT)
|
|
elif height == 2 and width == 2:
|
|
self._raw(TXT_2WIDTH)
|
|
self._raw(TXT_2HEIGHT)
|
|
else: # DEFAULT SIZE: NORMAL
|
|
self._raw(TXT_NORMAL)
|
|
|
|
|
|
def cut(self, mode=''):
|
|
""" Cut paper """
|
|
# Fix the size between last line and cut
|
|
# TODO: handle this with a line feed
|
|
self._raw("\n\n\n\n\n\n")
|
|
if mode.upper() == "PART":
|
|
self._raw(PAPER_PART_CUT)
|
|
else: # DEFAULT MODE: FULL CUT
|
|
self._raw(PAPER_FULL_CUT)
|
|
|
|
|
|
def cashdraw(self, pin):
|
|
""" Send pulse to kick the cash drawer """
|
|
if pin == 2:
|
|
self._raw(CD_KICK_2)
|
|
elif pin == 5:
|
|
self._raw(CD_KICK_5)
|
|
else:
|
|
raise CashDrawerError()
|
|
|
|
|
|
def hw(self, hw):
|
|
""" Hardware operations """
|
|
if hw.upper() == "INIT":
|
|
self._raw(HW_INIT)
|
|
elif hw.upper() == "SELECT":
|
|
self._raw(HW_SELECT)
|
|
elif hw.upper() == "RESET":
|
|
self._raw(HW_RESET)
|
|
else: # DEFAULT: DOES NOTHING
|
|
pass
|
|
|
|
|
|
def control(self, ctl):
|
|
""" Feed control sequences """
|
|
if ctl.upper() == "LF":
|
|
self._raw(CTL_LF)
|
|
elif ctl.upper() == "FF":
|
|
self._raw(CTL_FF)
|
|
elif ctl.upper() == "CR":
|
|
self._raw(CTL_CR)
|
|
elif ctl.upper() == "HT":
|
|
self._raw(CTL_HT)
|
|
elif ctl.upper() == "VT":
|
|
self._raw(CTL_VT)
|