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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* Copyright (C) 2004 The glibmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
_DEFS(glibmm,glib)
#include <glibmm/optionentry.h>
#include <glibmm/optiongroup.h>
#include <glibmm/error.h>
#include <sigc++/signal.h>
#ifndef DOXYGEN_SHOULD_SKIP_THIS
extern "C" { typedef struct _GOptionContext GOptionContext; }
#endif
namespace Glib
{
/** Exception class for options.
*/
_WRAP_GERROR(OptionError, GOptionError, G_OPTION_ERROR, NO_GTYPE, decl_prefix GLIBMM_API)
/** An OptionContext defines and parses commandline options, using OptionGroup%s and \link OptionEntry option entries \endlink.
*
* It supports short and long commandline options, as shown in the following example:
*
* <tt>testtreemodel -r 1 --max-size 20 --rand --display=:1.0 -vb -- file1 file2</tt>
*
* The example demonstrates a number of features of the GOption
* commandline parser:
* - Options can be single letters, prefixed by a single dash.
* - Multiple short options can be grouped behind a single dash.
* - Long options are prefixed by two consecutive dashes.
* - Options can have an extra argument, which can be a number, a string or
* a filename. For long options, the extra argument can be appended with
* an equals sign after the option name, which is useful if the extra
* argument starts with a dash, which would otherwise cause it to be
* interpreted as another option.
* - Non-option arguments are returned to the application as rest arguments.
* - An argument consisting solely of two dashes turns off further parsing,
* any remaining arguments (even those starting with a dash) are returned
* to the application as rest arguments.
*
* The OptionContext groups options in OptionGroups, which makes it easy to
* incorporate options from multiple sources. The intended use for this is
* to let applications collect option groups from the libraries it uses,
* add them to their OptionContext, and parse all options by a single call
* to parse(). See Gtk::Main::add_gtk_option_group(), for an example.
*
* Add options by creating OptionEntry instances and appropriately-typed variables,
* and adding them to an OptionGroup with OptionGroup::add_entry() or
* OptionGroup::add_entry_filename(). The option group should then be added to
* the OptionContext with set_main_group() or add_group().
*
* You might find it convenient to derive your own class from OptionGroup to
* contain these OptionEntry instances and member variables.
*
* If an option is of type string (see OptionGroup::add_entry()) or filename
* (see OptionGroup::add_entry_filename()), OptionContext takes
* care of converting it to the right encoding. strings are returned in
* UTF-8 encoding and filenames are returned in the GLib filename encoding.
* Note that this only works if setlocale() has been called before
* OptionContext::parse().
*
* OptionContext can automatically generate nicely formatted help output. Unless it is
* explicitly turned off with set_help_enabled(), this will recognize
* the --help, -?, --help-all and --help-groupname options
* (where groupname is the name of an OptionGroup) and write suitable text to
* stdout.
*
*
*/
class GLIBMM_API OptionContext
{
_CLASS_GENERIC(OptionContext, GOptionContext)
_IGNORE(g_option_context_free)
public:
/** Creates a new option context.
* @param parameter_string A string which is displayed in the first line of --help output, after programname [OPTION...]
*/
explicit OptionContext(const Glib::ustring& parameter_string = {});
//Note that, unlike Glib::wrap(), this would create a second C++ instance for the same C instance,
//so it should be used carefully. For instance you could not access data in a derived class via this second instance.
explicit OptionContext(GOptionContext* castitem, bool take_ownership = false);
OptionContext(const OptionContext& other) = delete;
OptionContext& operator=(const OptionContext& other) = delete;
OptionContext(OptionContext&& other) noexcept;
OptionContext& operator=(OptionContext&& other) noexcept;
virtual ~OptionContext();
_WRAP_METHOD(void set_help_enabled(bool help_enabled = true), g_option_context_set_help_enabled)
_WRAP_METHOD(bool get_help_enabled() const, g_option_context_get_help_enabled)
_WRAP_METHOD(void set_ignore_unknown_options(bool ignore_unknown = true), g_option_context_set_ignore_unknown_options)
_WRAP_METHOD(bool get_ignore_unknown_options() const, g_option_context_get_ignore_unknown_options)
_WRAP_METHOD(void set_strict_posix(bool strict_posix = true), g_option_context_set_strict_posix)
_WRAP_METHOD(bool get_strict_posix() const, g_option_context_get_strict_posix)
#m4 _CONVERSION(`char**&',`gchar***',`&($3)')
_WRAP_METHOD(bool parse(int& argc, char**& argv), g_option_context_parse, errthrow "Glib::OptionError, Glib::ConvertError")
/** Parses the command line arguments.
*
* This function is similar to parse(int& argc, char**& argv) except that it
* respects the normal memory rules when dealing with a strv instead of
* assuming that the passed-in array is the argv of the main function.
* In particular, strings that are removed from the arguments list will
* be freed using g_free().
*
* On Windows, the strings are expected to be in UTF-8. This is in
* contrast to parse(int& argc, char**& argv) which expects them to be in the
* system codepage, which is how they are passed as @a argv to main().
* See g_win32_get_command_line() or Gio::ApplicationCommandLine::get_arguments()
* for a solution.
*
* This function is useful if you are trying to use OptionContext with
* Gio::Application.
*
* @newin{2,50}
*
* @param[in,out] argv A pointer to the command line arguments
* (which must be in UTF-8 on Windows).
* @return <tt>true</tt> if the parsing was successful,
* <tt>false</tt> if an error occurred.
* @throw Glib::OptionError
* @throw Glib::ConvertError
*/
_WRAP_METHOD(bool parse(char**& argv), g_option_context_parse_strv, errthrow)
//g_option_context_add_main_entries(), just creates a group internally, adds them to it, and does a set_main_group()
//- a group without callbacks seems to do some simple default parsing.
_IGNORE(g_option_context_add_main_entries)
/** Adds an OptionGroup to the context, so that parsing with context will recognize the options in the group.
* Note that the group will not be copied, so it should exist for as long as the context exists.
*
* @param group The group to add.
*/
void add_group(OptionGroup& group);
_IGNORE(g_option_context_add_group)
/** Sets an OptionGroup as the main group of the context. This has the same effect as calling add_group(), the only
* difference is that the options in the main group are treated differently when generating --help output.
* Note that the group will not be copied, so it should exist for as long as the context exists.
*
* @param group The group to add.
*/
void set_main_group(OptionGroup& group);
_IGNORE(g_option_context_set_main_group)
//We don't need this (hopefully), and the memory management would be really awkward.
//OptionGroup& get_main_group();
//const OptionGroup& get_main_group() const;
_IGNORE(g_option_context_get_main_group)
#m4 _CONVERSION(`const OptionGroup&',`GOptionGroup*',`const_cast<GOptionGroup*>(($3).gobj())')
_WRAP_METHOD(Glib::ustring get_help(bool main_help, const OptionGroup& group) const, g_option_context_get_help)
/** Returns a formatted, translated help text for the given context.
*
* - To obtain the text produced by --help, call get_help(true).
* - To obtain the text produced by --help-all, call get_help(false).
* - To obtain the help text for an option group, call get_help(false, group).
*
* @param main_help If true, only include the main group.
* @result string containing the help text.
*/
Glib::ustring get_help(bool main_help = true) const;
GOptionContext* gobj() { return gobject_; }
const GOptionContext* gobj() const { return gobject_; }
_WRAP_METHOD(void set_summary(const Glib::ustring& summary), g_option_context_set_summary)
_WRAP_METHOD(Glib::ustring get_summary() const, g_option_context_get_summary)
_WRAP_METHOD(void set_description(const Glib::ustring& description), g_option_context_set_description)
_WRAP_METHOD(Glib::ustring get_description() const, g_option_context_get_description)
_WRAP_METHOD(void set_translation_domain(const Glib::ustring& domain), g_option_context_set_translation_domain)
/**
* This function is used to translate user-visible strings, for --help output.
* The function takes an untranslated string and returns a translated string
*/
using SlotTranslate = sigc::slot<Glib::ustring(const Glib::ustring&)>;
/**
* Sets the function which is used to translate user-visible
* strings, for --help output. Different groups can use different functions.
*
* If you are using gettext(), you only need to set the translation domain,
* see set_translation_domain().
*
* @newin{2,14}
*/
void set_translate_func (const SlotTranslate& slot);
_IGNORE(g_option_context_set_translate_func)
protected:
GOptionContext* gobject_;
bool has_ownership_;
};
} // namespace Glib
|
