From 38ce412a5d4ff25b484f6a92dbfb0711322b6321 Mon Sep 17 00:00:00 2001
From: Timo Sirainen <cras@irssi.org>
Date: Thu, 22 Aug 2002 20:49:07 +0000
Subject: [PATCH] /RELOADing broken theme file doesn't crash irssi anymore.

git-svn-id: http://svn.irssi.org/repos/irssi/trunk@2880 dbcabf3a-b0e7-0310-adc4-f8d773084564
---
 src/fe-common/core/themes.c | 42 ++++++++++++++++++++++++++++++-------
 src/fe-common/core/themes.h |  2 ++
 2 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/src/fe-common/core/themes.c b/src/fe-common/core/themes.c
index ec4a994a..d9aac5e2 100644
--- a/src/fe-common/core/themes.c
+++ b/src/fe-common/core/themes.c
@@ -50,6 +50,7 @@ THEME_REC *theme_create(const char *path, const char *name)
 	g_return_val_if_fail(name != NULL, NULL);
 
 	rec = g_new0(THEME_REC, 1);
+	rec->refcount = 1;
 	rec->path = g_strdup(path);
 	rec->name = g_strdup(name);
 	rec->abstracts = g_hash_table_new((GHashFunc) g_str_hash,
@@ -83,12 +84,8 @@ static void theme_module_destroy(const char *key, MODULE_THEME_REC *rec)
 	g_free(rec);
 }
 
-void theme_destroy(THEME_REC *rec)
+static void theme_real_destroy(THEME_REC *rec)
 {
-	themes = g_slist_remove(themes, rec);
-
-	signal_emit("theme destroyed", 1, rec);
-
 	g_hash_table_foreach(rec->abstracts, (GHFunc) theme_abstract_destroy, NULL);
 	g_hash_table_destroy(rec->abstracts);
 	g_hash_table_foreach(rec->modules, (GHFunc) theme_module_destroy, NULL);
@@ -102,6 +99,20 @@ void theme_destroy(THEME_REC *rec)
 	g_free(rec);
 }
 
+static void theme_unref(THEME_REC *rec)
+{
+	if (--rec->refcount == 0)
+		theme_real_destroy(rec);
+}
+
+void theme_destroy(THEME_REC *rec)
+{
+	themes = g_slist_remove(themes, rec);
+	signal_emit("theme destroyed", 1, rec);
+
+	theme_unref(rec);
+}
+
 static char *theme_replace_expand(THEME_REC *theme, int index,
 				  char default_fg, char default_bg,
 				  char *last_fg, char *last_bg,
@@ -1207,10 +1218,20 @@ static void read_settings(void)
 
 static void themes_read(void)
 {
+	GSList *refs;
 	char *fname;
 
-	while (themes != NULL)
-		theme_destroy(themes->data);
+	/* increase every theme's refcount, and destroy them. this way if
+	   we want to use the theme before it's reloaded we don't crash. */
+	refs = NULL;
+	while (themes != NULL) {
+		THEME_REC *theme = themes->data;
+
+		refs = g_slist_prepend(refs, theme);
+
+		theme->refcount++;
+		theme_destroy(theme);
+	}
 
 	/* first there's default theme.. */
 	current_theme = theme_load("default");
@@ -1223,7 +1244,12 @@ static void themes_read(void)
 	}
 
         window_themes_update();
-        change_theme(settings_get_str("theme"), FALSE);
+	change_theme(settings_get_str("theme"), FALSE);
+
+	while (refs != NULL) {
+		theme_unref(refs->data);
+		refs = g_slist_remove(refs, refs->data);
+	}
 }
 
 void themes_init(void)
diff --git a/src/fe-common/core/themes.h b/src/fe-common/core/themes.h
index 3ef7cb92..0a809b95 100644
--- a/src/fe-common/core/themes.h
+++ b/src/fe-common/core/themes.h
@@ -11,6 +11,8 @@ typedef struct {
 } MODULE_THEME_REC;
 
 typedef struct {
+	int refcount;
+
 	char *path;
 	char *name;
         time_t last_modify;