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core: add core-theme skeleton and theme registry

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Introduce a new module (core-theme.{c,h}) holding the in-memory registry
of built-in themes used by the upcoming /theme command:

- struct t_theme stores name, description, date and weechat version
  captured at registration time, plus a hashtable of overrides keyed by
  full option name (file.section.option) -> value string.
- theme_register (name, overrides) creates a new theme or merges the
  given overrides into an existing one (later calls override duplicate
  keys); this is the API plugins and scripts will use to contribute
  per-theme color values.
- theme_search and theme_list provide lookup and ordered enumeration.
- theme_init / theme_end are called from weechat_init / weechat_end.

The theme_applying flag is declared here but not yet consumed (it will
gate config_change_color in the next commit to avoid N redundant
window refreshes during /theme apply).

User theme files are not handled by this module: they are read
transiently inside /theme apply (a later commit) and never cached.
This commit is contained in:
Sébastien Helleu
2026-05-26 08:07:53 +02:00
parent 678a222bf3
commit bb396c352f
7 changed files with 636 additions and 0 deletions
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src/core/core-theme.h
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/*
* SPDX-FileCopyrightText: 2026 Sébastien Helleu <flashcode@flashtux.org>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This file is part of WeeChat, the extensible chat client.
*
* WeeChat 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 3 of the License, or
* (at your option) any later version.
*
* WeeChat 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WeeChat. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef WEECHAT_THEME_H
#define WEECHAT_THEME_H
struct t_hashtable;
struct t_arraylist;
struct t_theme
{
char *name; /* "dark", "solarized", ... */
char *description; /* free-form text */
char *date; /* "YYYY-MM-DD HH:MM:SS" */
char *weechat_version; /* version at registration time */
struct t_hashtable *overrides; /* full_option_name -> value */
struct t_theme *prev_theme; /* link to previous theme */
struct t_theme *next_theme; /* link to next theme */
};
extern struct t_theme *themes;
extern struct t_theme *last_theme;
extern int theme_applying; /* gate for config_change_color */
extern struct t_theme *theme_search (const char *name);
extern struct t_theme *theme_register (const char *name,
struct t_hashtable *overrides);
extern struct t_arraylist *theme_list (void);
extern void theme_init (void);
extern void theme_end (void);
#endif /* WEECHAT_THEME_H */