language_selection.cpp

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/*
    Copyright (C) 2008 - 2025
    by Mark de Wever <koraq@xs4all.nl>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY.
 
    See the COPYING file for more details.
*/
 
#define GETTEXT_DOMAIN "wesnoth-lib"
 
#include "gui/dialogs/language_selection.hpp"
 
#include "gui/widgets/listbox.hpp"
#include "gui/widgets/toggle_button.hpp"
#include "gui/widgets/window.hpp"
#include "game_config.hpp"
#include "gettext.hpp"
#include "language.hpp"
#include "preferences/preferences.hpp"
#include "serialization/markup.hpp"
 
namespace gui2::dialogs
{
 
namespace
{
 
const std::string translations_wiki_url = "https://wiki.wesnoth.org/WesnothTranslations";
 
const std::string translations_stats_url = "https://gettext.wesnoth.org/";
 
}
 
REGISTER_DIALOG(language_selection)
 
language_selection::language_selection()
    : modal_dialog(window_id())
    , langs_(get_languages(true))
    , complete_langs_(langs_.size())
{
    bool show_all = get_min_translation_percent() == 0;
 
    const language_def& current_language = get_language();
 
    // Build language list and completion filter
    for(std::size_t i = 0; i < langs_.size(); ++i) {
        if(langs_[i] == current_language) {
            // Always show the initial language regardless of completion. If it's under
            // threshold then it probably means we should start by showing all languages
            // too, regardless of what the initial threshold setting is.
            complete_langs_[i] = true;
            if(langs_[i].percent < get_min_translation_percent()) {
                show_all = true;
            }
        } else {
            complete_langs_[i] = langs_[i].percent >= get_min_translation_percent();
        }
    }
 
    register_bool("show_all", true, [show_all]() { return show_all; });
    // Markup needs to be enabled for the link to be highlighted
    register_label("contrib_url", true, translations_wiki_url, true);
    register_label("stats_url", true, translations_stats_url, true);
}
 
void language_selection::shown_filter_callback()
{
    toggle_button& show_all_toggle = find_widget<toggle_button>("show_all");
    listbox& list = find_widget<listbox>("language_list");
 
    if(show_all_toggle.get_value_bool()) {
        boost::dynamic_bitset<> mask;
        mask.resize(langs_.size(), true);
        list.set_row_shown(mask);
    } else {
        list.set_row_shown(complete_langs_);
    }
}
 
void language_selection::pre_show()
{
    listbox& list = find_widget<listbox>("language_list");
    keyboard_capture(&list);
 
    toggle_button& show_all_toggle = find_widget<toggle_button>("show_all");
    connect_signal_mouse_left_click(show_all_toggle, std::bind(
            &language_selection::shown_filter_callback, this));
 
    // Disable show all languages toggle when --all-translations or --translations-over 0
    // command line options are used, since in these cases there is no difference in the
    // languages shown between toggles, making it redundant.
    if(get_min_translation_percent() <= 0) {
        show_all_toggle.set_active(false);
    }
 
    const language_def& current_language = get_language();
 
    for(const auto& lang : langs_) {
        std::string lang_label = game_config::debug && !lang.localename.empty()
            ? lang.language + "\n" + markup::tag("small", markup::tag("tt", lang.localename))
            : lang.language;
 
        list.add_row(widget_data{
            { "language", {
                { "label", std::move(lang_label) },
                { "use_markup", "true" }
            }},
            { "translated_total", {
                {
                    "label",
                    lang.localename.empty() ? "" :  // do not show 100% for system default language
                        markup::span_color(game_config::red_to_green(lang.percent), lang.percent, "%")
                },
                { "use_markup", "true" }
            }},
        });
 
        if(lang == current_language) {
            list.select_last_row();
        }
    }
 
    // The view filter needs to be set after building the list to take the Show
    // All toggle value + language completion stats into account as needed.
    shown_filter_callback();
}
 
void language_selection::post_show()
{
    if(get_retval() == retval::OK) {
        const int res = find_widget<listbox>("language_list")
                                .get_selected_row();
 
        assert(res != -1);
 
        ::set_language(langs_[res]);
        prefs::get().set_locale(langs_[res].localename);
    }
}
 
} // namespace dialogs