trigger: contribute "light" theme overrides

Add trigger-theme.{c,h} with the trigger plugin contribution to the
built-in "light" theme: 6 entries (flag_command, flag_conditions,
flag_post_action, flag_regex, flag_return_code, regex) tuned for a
light-background terminal.

Same 2D-array pattern as the other plugin contributions.

Default option values are NOT changed.

src/plugins/trigger/CMakeLists.txt

@@ -26,6 +26,7 @@ add_library(trigger MODULE
   trigger-command.c trigger-command.h
   trigger-completion.c trigger-completion.h
   trigger-config.c trigger-config.h
+  trigger-theme.c trigger-theme.h
 )
 set_target_properties(trigger PROPERTIES PREFIX "")
 

src/plugins/trigger/trigger-theme.c

@@ -0,0 +1,89 @@
+/*
+ * 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/>.
+ */
+
+/* trigger contribution to built-in themes. */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stddef.h>
+
+#include "../weechat-plugin.h"
+#include "trigger.h"
+#include "trigger-theme.h"
+
+
+/*
+ * trigger contribution to the "light" theme: option values tuned for a
+ * light-background terminal. Each row is { option_full_name, value };
+ * the table is NULL-terminated.
+ */
+
+const char *trigger_theme_light[][2] =
+{
+    { "trigger.color.flag_command",     "green" },
+    { "trigger.color.flag_conditions",  "94" },
+    { "trigger.color.flag_post_action", "blue" },
+    { "trigger.color.flag_regex",       "cyan" },
+    { "trigger.color.flag_return_code", "magenta" },
+    { "trigger.color.regex",            "default" },
+    { NULL,                             NULL },
+};
+
+/*
+ * Register trigger's contribution to one theme from a NULL-terminated
+ * table of {option, value} rows.
+ */
+
+void
+trigger_theme_register (const char *name, const char *entries[][2])
+{
+    struct t_hashtable *overrides;
+    int i;
+
+    if (!name || !entries)
+        return;
+
+    overrides = weechat_hashtable_new (32,
+                                       WEECHAT_HASHTABLE_STRING,
+                                       WEECHAT_HASHTABLE_STRING,
+                                       NULL, NULL);
+    if (!overrides)
+        return;
+
+    for (i = 0; entries[i][0]; i++)
+        weechat_hashtable_set (overrides, entries[i][0], entries[i][1]);
+
+    weechat_theme_register (name, overrides);
+
+    weechat_hashtable_free (overrides);
+}
+
+/*
+ * Register all built-in theme contributions from trigger.
+ */
+
+void
+trigger_theme_init (void)
+{
+    trigger_theme_register ("light", trigger_theme_light);
+}

src/plugins/trigger/trigger-theme.h

@@ -0,0 +1,27 @@
+/*
+ * 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_PLUGIN_TRIGGER_THEME_H
+#define WEECHAT_PLUGIN_TRIGGER_THEME_H
+
+extern void trigger_theme_init (void);
+
+#endif /* WEECHAT_PLUGIN_TRIGGER_THEME_H */

src/plugins/trigger/trigger.c

@@ -34,6 +34,7 @@
 #include "trigger-command.h"
 #include "trigger-completion.h"
 #include "trigger-config.h"
+#include "trigger-theme.h"
 
 
 WEECHAT_PLUGIN_NAME(TRIGGER_PLUGIN_NAME);
@@ -1377,6 +1378,8 @@ weechat_plugin_init (struct t_weechat_plugin *plugin, int argc, char *argv[])
 
     trigger_config_read ();
 
+    trigger_theme_init ();
+
     /* hook some signals */
     weechat_hook_signal ("debug_dump", &trigger_debug_dump_cb, NULL, NULL);