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Merge pull request #835 from ailin-nemui/theme-stack

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protect theme recursion
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ailin-nemui 2018-02-07 21:23:39 +01:00 committed by GitHub
commit 02712942e0
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 38 additions and 19 deletions
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57
src/fe-common/core/themes.c
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@ -382,7 +382,8 @@ char *theme_format_expand_get(THEME_REC *theme, const char **format)
} else {
theme_format_append_next(theme, str, format,
reset, reset,
&dummy, &dummy, 0);
&dummy, &dummy,
EXPAND_FLAG_IGNORE_REPLACES);
continue;
}
@ -400,12 +401,15 @@ char *theme_format_expand_get(THEME_REC *theme, const char **format)
return ret;
}
static char *theme_format_expand_data_rec(THEME_REC *theme, const char **format,
theme_rm_col default_fg, theme_rm_col default_bg,
theme_rm_col *save_last_fg, theme_rm_col *save_last_bg,
int flags, GTree *block_list);
/* expand a single {abstract ...data... } */
static char *theme_format_expand_abstract(THEME_REC *theme,
const char **formatp,
theme_rm_col *last_fg,
theme_rm_col *last_bg,
int flags)
static char *theme_format_expand_abstract(THEME_REC *theme, const char **formatp,
theme_rm_col *last_fg, theme_rm_col *last_bg, int flags,
GTree *block_list)
{
GString *str;
const char *p, *format;
@ -439,12 +443,20 @@ static char *theme_format_expand_abstract(THEME_REC *theme,
}
*formatp = format+len;
if (block_list == NULL) {
block_list = g_tree_new_full((GCompareDataFunc) g_strcmp0, NULL, g_free, NULL);
} else {
g_tree_ref(block_list);
}
/* get the abstract data */
data = g_hash_table_lookup(theme->abstracts, abstract);
g_free(abstract);
if (data == NULL) {
if (data == NULL || g_tree_lookup(block_list, abstract) != NULL) {
/* unknown abstract, just display the data */
data = "$0-";
g_free(abstract);
} else {
g_tree_insert(block_list, abstract, abstract);
}
abstract = g_strdup(data);
@ -488,18 +500,17 @@ static char *theme_format_expand_abstract(THEME_REC *theme,
/* abstract may itself contain abstracts or replaces */
p = abstract;
ret = theme_format_expand_data(theme, &p, default_fg, default_bg,
last_fg, last_bg,
flags | EXPAND_FLAG_LASTCOLOR_ARG);
ret = theme_format_expand_data_rec(theme, &p, default_fg, default_bg, last_fg, last_bg,
flags | EXPAND_FLAG_LASTCOLOR_ARG, block_list);
g_free(abstract);
g_tree_unref(block_list);
return ret;
}
/* expand the data part in {abstract data} */
char *theme_format_expand_data(THEME_REC *theme, const char **format,
theme_rm_col default_fg, theme_rm_col default_bg,
theme_rm_col *save_last_fg, theme_rm_col *save_last_bg,
int flags)
static char *theme_format_expand_data_rec(THEME_REC *theme, const char **format,
theme_rm_col default_fg, theme_rm_col default_bg,
theme_rm_col *save_last_fg, theme_rm_col *save_last_bg,
int flags, GTree *block_list)
{
GString *str;
char *ret, *abstract;
@ -545,9 +556,8 @@ char *theme_format_expand_data(THEME_REC *theme, const char **format,
break; /* error */
/* get a single {...} */
abstract = theme_format_expand_abstract(theme, format,
&last_fg, &last_bg,
recurse_flags);
abstract = theme_format_expand_abstract(theme, format, &last_fg, &last_bg,
recurse_flags, block_list);
if (abstract != NULL) {
g_string_append(str, abstract);
g_free(abstract);
@ -565,6 +575,15 @@ char *theme_format_expand_data(THEME_REC *theme, const char **format,
return ret;
}
/* expand the data part in {abstract data} */
char *theme_format_expand_data(THEME_REC *theme, const char **format, theme_rm_col default_fg,
theme_rm_col default_bg, theme_rm_col *save_last_fg,
theme_rm_col *save_last_bg, int flags)
{
return theme_format_expand_data_rec(theme, format, default_fg, default_bg, save_last_bg,
save_last_bg, flags, NULL);
}
#define IS_OLD_FORMAT(code, last_fg, last_bg) \
(((code) == 'n' && (last_fg) == 'n' && (last_bg) == 'n') || \
((code) != 'n' && ((code) == (last_fg) || (code) == (last_bg))))