harfbuzz/util/main-font-text.hh

97 lines
2.7 KiB
C++

/*
* Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_MAIN_FONT_TEXT_HH
#define HB_MAIN_FONT_TEXT_HH
#include "hb.hh"
#include "options.hh"
/* main() body for utilities taking font and processing text.*/
static char *
locale_to_utf8 (char *s)
{
char *t;
GError *error = nullptr;
t = g_locale_to_utf8 (s, -1, nullptr, nullptr, &error);
if (!t)
{
fail (true, "Failed converting text to UTF-8");
}
return t;
}
template <typename consumer_t, int default_font_size, int subpixel_bits>
struct main_font_text_t
{
main_font_text_t ()
: options ("[FONT-FILE] [TEXT]"),
font_opts (&options, default_font_size, subpixel_bits),
input (&options),
consumer (&options) {}
int
main (int argc, char **argv)
{
options.parse (&argc, &argv);
argc--, argv++;
if (argc && !font_opts.font_file) font_opts.font_file = locale_to_utf8 (argv[0]), argc--, argv++;
if (argc && !input.text && !input.text_file) input.text = locale_to_utf8 (argv[0]), argc--, argv++;
if (argc)
fail (true, "Too many arguments on the command line");
if (!font_opts.font_file)
options.usage ();
if (!input.text && !input.text_file)
input.text_file = g_strdup ("-");
hb_buffer_t *buffer = hb_buffer_create ();
consumer.init (buffer, &font_opts);
hb_buffer_destroy (buffer);
unsigned int text_len;
const char *text;
while ((text = input.get_line (&text_len)))
consumer.consume_line (text, text_len, input.text_before, input.text_after);
consumer.finish (&font_opts);
return consumer.failed ? 1 : 0;
}
protected:
option_parser_t options;
font_options_t font_opts;
text_options_t input;
consumer_t consumer;
};
#endif