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1 /*
2  * Copyright © 2011,2012  Google, Inc.
3  *
4  *  This is part of HarfBuzz, a text shaping library.
5  *
6  * Permission is hereby granted, without written agreement and without
7  * license or royalty fees, to use, copy, modify, and distribute this
8  * software and its documentation for any purpose, provided that the
9  * above copyright notice and the following two paragraphs appear in
10  * all copies of this software.
11  *
12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16  * DAMAGE.
17  *
18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23  *
24  * Google Author(s): Behdad Esfahbod
25  */
26 
27 #ifndef HB_MAIN_FONT_TEXT_HH
28 #define HB_MAIN_FONT_TEXT_HH
29 
30 #include "hb.hh"
31 #include "options.hh"
32 
33 /* main() body for utilities taking font and processing text.*/
34 
35 static char *
locale_to_utf8(char * s)36 locale_to_utf8 (char *s)
37 {
38   char *t;
39   GError *error = nullptr;
40 
41   t = g_locale_to_utf8 (s, -1, nullptr, nullptr, &error);
42   if (!t)
43   {
44      fail (true, "Failed converting text to UTF-8");
45   }
46 
47   return t;
48 }
49 
50 template <typename consumer_t, int default_font_size, int subpixel_bits>
51 struct main_font_text_t
52 {
main_font_text_tmain_font_text_t53   main_font_text_t ()
54 		  : options ("[FONT-FILE] [TEXT]"),
55 		    font_opts (&options, default_font_size, subpixel_bits),
56 		    input (&options),
57 		    consumer (&options) {}
58 
59   int
mainmain_font_text_t60   main (int argc, char **argv)
61   {
62     options.parse (&argc, &argv);
63 
64     argc--, argv++;
65     if (argc && !font_opts.font_file) font_opts.font_file = locale_to_utf8 (argv[0]), argc--, argv++;
66     if (argc && !input.text && !input.text_file) input.text = locale_to_utf8 (argv[0]), argc--, argv++;
67     if (argc)
68       fail (true, "Too many arguments on the command line");
69     if (!font_opts.font_file)
70       options.usage ();
71     if (!input.text && !input.text_file)
72       input.text_file = g_strdup ("-");
73 
74     hb_buffer_t *buffer = hb_buffer_create ();
75     consumer.init (buffer, &font_opts);
76     hb_buffer_destroy (buffer);
77 
78     unsigned int text_len;
79     const char *text;
80     while ((text = input.get_line (&text_len)))
81       consumer.consume_line (text, text_len, input.text_before, input.text_after);
82 
83     consumer.finish (&font_opts);
84 
85     return consumer.failed ? 1 : 0;
86   }
87 
88   protected:
89   option_parser_t options;
90   font_options_t font_opts;
91   text_options_t input;
92   consumer_t consumer;
93 };
94 
95 #endif
96 
97