/* 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)
/** 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 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 = Glib::ustring());
//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);
//TODO?:
//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", errthrow)
/** 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