harfbuzz/util/options.hh

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/*
* Copyright © 2011 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 OPTIONS_HH
#define OPTIONS_HH
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <locale.h>
#include <errno.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for isatty() */
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
#include <io.h> /* for setmode() under Windows */
#endif
#include <hb.h>
#ifdef HAVE_OT
#include <hb-ot.h>
#endif
#include <glib.h>
#include <glib/gprintf.h>
#undef MIN
template <typename Type> static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
#undef MAX
template <typename Type> static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
void fail (hb_bool_t suggest_help, const char *format, ...) G_GNUC_NORETURN;
extern hb_bool_t debug;
struct option_group_t
{
virtual void add_options (struct option_parser_t *parser) = 0;
virtual void pre_parse (GError **error G_GNUC_UNUSED) {};
virtual void post_parse (GError **error G_GNUC_UNUSED) {};
};
struct option_parser_t
{
option_parser_t (const char *usage) {
memset (this, 0, sizeof (*this));
usage_str = usage;
context = g_option_context_new (usage);
add_main_options ();
}
~option_parser_t (void) {
g_option_context_free (context);
}
void add_main_options (void);
void add_group (GOptionEntry *entries,
const gchar *name,
const gchar *description,
const gchar *help_description,
option_group_t *option_group);
void parse (int *argc, char ***argv);
G_GNUC_NORETURN void usage (void) {
g_printerr ("Usage: %s [OPTION...] %s\n", g_get_prgname (), usage_str);
exit (1);
}
const char *usage_str;
GOptionContext *context;
};
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#define DEFAULT_MARGIN 16
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#define DEFAULT_FORE "#000000"
#define DEFAULT_BACK "#FFFFFF"
#define DEFAULT_FONT_SIZE 256
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struct view_options_t : option_group_t
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{
view_options_t (option_parser_t *parser) {
annotate = false;
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fore = DEFAULT_FORE;
back = DEFAULT_BACK;
line_space = 0;
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margin.t = margin.r = margin.b = margin.l = DEFAULT_MARGIN;
font_size = DEFAULT_FONT_SIZE;
add_options (parser);
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}
void add_options (option_parser_t *parser);
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hb_bool_t annotate;
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const char *fore;
const char *back;
double line_space;
struct margin_t {
double t, r, b, l;
} margin;
double font_size;
};
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struct shape_options_t : option_group_t
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{
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shape_options_t (option_parser_t *parser)
{
direction = language = script = NULL;
bot = eot = preserve_default_ignorables = false;
features = NULL;
num_features = 0;
shapers = NULL;
utf8_clusters = false;
normalize_glyphs = false;
num_iterations = 1;
add_options (parser);
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}
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~shape_options_t (void)
{
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free (features);
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g_strfreev (shapers);
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}
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void add_options (option_parser_t *parser);
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void setup_buffer (hb_buffer_t *buffer)
{
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hb_buffer_set_direction (buffer, hb_direction_from_string (direction, -1));
hb_buffer_set_script (buffer, hb_script_from_string (script, -1));
hb_buffer_set_language (buffer, hb_language_from_string (language, -1));
hb_buffer_set_flags (buffer, (hb_buffer_flags_t) (HB_BUFFER_FLAGS_DEFAULT |
(bot ? HB_BUFFER_FLAG_BOT : 0) |
(eot ? HB_BUFFER_FLAG_EOT : 0) |
(preserve_default_ignorables ? HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES : 0)));
hb_buffer_guess_segment_properties (buffer);
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}
void populate_buffer (hb_buffer_t *buffer, const char *text, int text_len,
const char *text_before, const char *text_after)
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{
hb_buffer_clear_contents (buffer);
if (text_before) {
unsigned int len = strlen (text_before);
hb_buffer_add_utf8 (buffer, text_before, len, len, 0);
}
hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
if (text_after) {
hb_buffer_add_utf8 (buffer, text_after, -1, 0, 0);
}
if (!utf8_clusters) {
/* Reset cluster values to refer to Unicode character index
* instead of UTF-8 index. */
unsigned int num_glyphs = hb_buffer_get_length (buffer);
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
for (unsigned int i = 0; i < num_glyphs; i++)
{
info->cluster = i;
info++;
}
}
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setup_buffer (buffer);
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}
hb_bool_t shape (hb_font_t *font, hb_buffer_t *buffer)
{
hb_bool_t res = hb_shape_full (font, buffer, features, num_features, shapers);
if (normalize_glyphs)
hb_buffer_normalize_glyphs (buffer);
return res;
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}
void shape_closure (const char *text, int text_len,
hb_font_t *font, hb_buffer_t *buffer,
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hb_set_t *glyphs)
{
hb_buffer_reset (buffer);
hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
setup_buffer (buffer);
hb_ot_shape_glyphs_closure (font, buffer, features, num_features, glyphs);
}
/* Buffer properties */
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const char *direction;
const char *language;
const char *script;
/* Buffer flags */
hb_bool_t bot;
hb_bool_t eot;
hb_bool_t preserve_default_ignorables;
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hb_feature_t *features;
unsigned int num_features;
char **shapers;
hb_bool_t utf8_clusters;
hb_bool_t normalize_glyphs;
unsigned int num_iterations;
};
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struct font_options_t : option_group_t
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{
font_options_t (option_parser_t *parser) {
font_file = NULL;
face_index = 0;
font = NULL;
add_options (parser);
}
~font_options_t (void) {
hb_font_destroy (font);
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}
void add_options (option_parser_t *parser);
hb_font_t *get_font (void) const;
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const char *font_file;
int face_index;
private:
mutable hb_font_t *font;
};
struct text_options_t : option_group_t
{
text_options_t (option_parser_t *parser) {
text_before = NULL;
text_after = NULL;
text = NULL;
text_file = NULL;
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fp = NULL;
gs = NULL;
text_len = (unsigned int) -1;
add_options (parser);
}
~text_options_t (void) {
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if (gs)
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g_string_free (gs, true);
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if (fp)
fclose (fp);
}
void add_options (option_parser_t *parser);
void post_parse (GError **error G_GNUC_UNUSED) {
if (text && text_file)
g_set_error (error,
G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Only one of text and text-file can be set");
};
const char *get_line (unsigned int *len);
const char *text_before;
const char *text_after;
const char *text;
const char *text_file;
private:
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FILE *fp;
GString *gs;
unsigned int text_len;
};
struct output_options_t : option_group_t
{
output_options_t (option_parser_t *parser,
const char *supported_formats_ = NULL) {
output_file = NULL;
output_format = NULL;
supported_formats = supported_formats_;
explicit_output_format = false;
fp = NULL;
add_options (parser);
}
~output_options_t (void) {
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if (fp)
fclose (fp);
}
void add_options (option_parser_t *parser);
void post_parse (GError **error G_GNUC_UNUSED)
{
if (output_format)
explicit_output_format = true;
if (output_file && !output_format) {
output_format = strrchr (output_file, '.');
if (output_format)
output_format++; /* skip the dot */
}
if (output_file && 0 == strcmp (output_file, "-"))
output_file = NULL; /* STDOUT */
}
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FILE *get_file_handle (void);
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const char *output_file;
const char *output_format;
const char *supported_formats;
bool explicit_output_format;
mutable FILE *fp;
};
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struct format_options_t : option_group_t
{
format_options_t (option_parser_t *parser) {
show_glyph_names = true;
show_positions = true;
show_clusters = true;
show_text = false;
show_unicode = false;
show_line_num = false;
add_options (parser);
}
void add_options (option_parser_t *parser);
void serialize_unicode (hb_buffer_t *buffer,
GString *gs);
void serialize_glyphs (hb_buffer_t *buffer,
hb_font_t *font,
hb_buffer_serialize_format_t format,
hb_buffer_serialize_flags_t flags,
GString *gs);
void serialize_line_no (unsigned int line_no,
GString *gs);
void serialize_buffer_of_text (hb_buffer_t *buffer,
unsigned int line_no,
const char *text,
unsigned int text_len,
hb_font_t *font,
GString *gs);
void serialize_message (unsigned int line_no,
const char *msg,
GString *gs);
void serialize_buffer_of_glyphs (hb_buffer_t *buffer,
unsigned int line_no,
const char *text,
unsigned int text_len,
hb_font_t *font,
hb_buffer_serialize_format_t output_format,
hb_buffer_serialize_flags_t format_flags,
GString *gs);
hb_bool_t show_glyph_names;
hb_bool_t show_positions;
hb_bool_t show_clusters;
hb_bool_t show_text;
hb_bool_t show_unicode;
hb_bool_t show_line_num;
};
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#endif