1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
-- Welcome to the 'barracuda' barcode library
--
-- Encode a message into a barcode symbol, in Lua or within a LuaTeX source file
--
-- Copyright (C) 2019-2022 Roberto Giacomelli
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-- Basic Conventions:
-- fields that start with an undercore must be considered as private
-- class name follows the snake case naming convention
-- the 'barracuda' table is the only global object to access every package
-- modules.
local Barracuda = {
_NAME = "barracuda",
_VERSION = "barracuda v0.0.12",
_DATE = "2022-06-23",
_DESCRIPTION = "Lua library for barcode printing",
_URL = "https://github.com/robitex/barracuda",
_LICENSE = "GNU GENERAL PUBLIC LICENSE, Version 2, June 1991",
}
-- essential sub-module loading
Barracuda._libgeo = require "lib-geo.brcd-libgeo" -- basic vector objects
Barracuda._gacanvas = require "lib-geo.brcd-gacanvas" -- ga stream library
Barracuda._barcode = require "lib-barcode.brcd-barcode" -- barcode abstract class
Barracuda._lib_driver = require "lib-driver.brcd-driver" -- abstract driver class
local Barcode = Barracuda._barcode
Barcode._libgeo = Barracuda._libgeo
-- a reference to Driver class for gaCancas class
local canvas = Barracuda._gacanvas
canvas._driver_class = Barracuda._lib_driver
-- return a reference of Barcode abstract class
function Barracuda:barcode() --> <Barcode class>
return self._barcode
end
-- return a reference to the libgeo library
function Barracuda:libgeo() --> <libgeo library>
return self._libgeo
end
-- encoder costructor (a bridge to Barcode class method)
function Barracuda:new_encoder(treename, opt) --> object, err
local barcode = self._barcode
local enc, err = barcode:new_encoder(treename, opt) --> object, err
return enc, err
end
-- where we place the output driver library
function Barracuda:get_driver() --> Driver object
return self._lib_driver
end
function Barracuda:new_canvas() --> canvas
local gacanvas = self._gacanvas
return gacanvas:new()
end
-- high level barcode functions
-- panic on error
-- save barcode as a graphic external file
-- 'treename' mandatory encoder identifier <family>-<variant>:<name>
-- 'data' mandatory the object string or integer being encoded
-- 'filename' mandatory output filename
-- 'id_drv' optional driver identifier, defualt 'svg'
-- 'opt' optional table for symbol parameters
function Barracuda:save(treename, data, filename, id_drv, opt)
local barcode = self._barcode
local enc_archive = barcode._encoder_instances
local enc = enc_archive[treename]
if not enc then
local err
enc, err = barcode:new_encoder(treename)
assert(enc, err)
end
-- make symbol
local symb
local arg_data = type(data)
if arg_data == "number" then
local err_data
symb, err_data = enc:from_uint(data)
assert(symb, err_data)
elseif arg_data == "string" then
local err_data
symb, err_data = enc:from_string(data)
assert(symb, err_data)
else
error("[ArgErr] unsupported type for 'data'")
end
if opt then
local ok, err = symb:set_param(opt)
assert(ok, err)
end
local canvas = self:new_canvas()
symb:draw(canvas)
local driver = self:get_driver()
id_drv = id_drv or "svg"
local ok, err = driver:save(id_drv, canvas, filename)
assert(ok, err)
end
-- this is a only LuaTeX method
-- 'treename' mandatory encoder identifier <family>-<variant>:<name>
-- 'data' mandatory the object string or integer being encoded
-- 'box_name' mandatory TeX hbox name
-- 'opt' optional table for symbol parameters
function Barracuda:hbox(treename, data, box_name, opt)
local barcode = self._barcode
local enc_archive = barcode._encoder_instances
local enc = enc_archive[treename]
if not enc then
local err
enc, err = barcode:new_encoder(treename)
assert(enc, err)
end
-- make symbol
local symb
local arg_data = type(data)
if arg_data == "number" then
local err_data
symb, err_data = enc:from_uint(data)
assert(symb, err_data)
elseif arg_data == "string" then
local err_data
symb, err_data = enc:from_string(data)
assert(symb, err_data)
else
error("[ArgErr] unsupported type for 'data'")
end
if opt then
local ok, err = symb:set_param(opt)
assert(ok, err)
end
local canvas = self:new_canvas()
symb:draw(canvas)
local driver = self:get_driver()
local ok, err = driver:ga_to_hbox(canvas, box_name)
assert(ok, err)
end
return Barracuda
|
