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Fix memory leaks in title_format. 

This fixes three memory leaks that were found during the implementation of #2120
so that they can be fixed in a bugfix release.

relates to #2143
This commit is contained in:
Ingo Bürk 2016-01-04 18:39:40 -05:00
parent e70b2f9dcd
commit 6fefe836d4
3 changed files with 44 additions and 15 deletions
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7
include/util.h
View File

@ -130,6 +130,13 @@ void *memmem(const void *l, size_t l_len, const void *s, size_t s_len);
#endif
/**
* Escapes the given string if a pango font is currently used.
* If the string has to be escaped, the input string will be free'd.
*
*/
char *pango_escape_markup(char *input);
/**
* Starts an i3-nagbar instance with the given parameters. Takes care of
* handling SIGCHLD and killing i3-nagbar when i3 exits.

14
src/util.c
View File

@ -332,6 +332,20 @@ void *memmem(const void *l, size_t l_len, const void *s, size_t s_len) {
#endif
/*
* Escapes the given string if a pango font is currently used.
* If the string has to be escaped, the input string will be free'd.
*
*/
char *pango_escape_markup(char *input) {
if (!font_is_pango())
return input;
char *escaped = g_markup_escape_text(input, -1);
FREE(input);
return escaped;
}
/*
* Handler which will be called when we get a SIGCHLD for the nagbar, meaning
* it exited (or could not be started, depending on the exit code).

38
src/window.c
View File

@ -66,8 +66,12 @@ void window_update_name(i3Window *win, xcb_get_property_reply_t *prop, bool befo
i3string_free(win->name);
win->name = i3string_from_utf8_with_length(xcb_get_property_value(prop),
xcb_get_property_value_length(prop));
if (win->title_format != NULL)
ewmh_update_visible_name(win->id, i3string_as_utf8(window_parse_title_format(win)));
if (win->title_format != NULL) {
i3String *name = window_parse_title_format(win);
ewmh_update_visible_name(win->id, i3string_as_utf8(name));
I3STRING_FREE(name);
}
win->name_x_changed = true;
LOG("_NET_WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
@ -106,8 +110,11 @@ void window_update_name_legacy(i3Window *win, xcb_get_property_reply_t *prop, bo
i3string_free(win->name);
win->name = i3string_from_utf8_with_length(xcb_get_property_value(prop),
xcb_get_property_value_length(prop));
if (win->title_format != NULL)
ewmh_update_visible_name(win->id, i3string_as_utf8(window_parse_title_format(win)));
if (win->title_format != NULL) {
i3String *name = window_parse_title_format(win);
ewmh_update_visible_name(win->id, i3string_as_utf8(name));
I3STRING_FREE(name);
}
LOG("WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
LOG("Using legacy window title. Note that in order to get Unicode window "
@ -340,18 +347,14 @@ void window_update_motif_hints(i3Window *win, xcb_get_property_reply_t *prop, bo
*
*/
i3String *window_parse_title_format(i3Window *win) {
/* We need to ensure that we only escape the window title if pango
* is used by the current font. */
const bool pango_markup = font_is_pango();
char *format = win->title_format;
if (format == NULL)
return i3string_copy(win->name);
/* We initialize these lazily so we only escape them if really necessary. */
const char *escaped_title = NULL;
const char *escaped_class = NULL;
const char *escaped_instance = NULL;
char *escaped_title = NULL;
char *escaped_class = NULL;
char *escaped_instance = NULL;
/* We have to first iterate over the string to see how much buffer space
* we need to allocate. */
@ -359,19 +362,19 @@ i3String *window_parse_title_format(i3Window *win) {
for (char *walk = format; *walk != '\0'; walk++) {
if (STARTS_WITH(walk, "%title")) {
if (escaped_title == NULL)
escaped_title = win->name == NULL ? "" : i3string_as_utf8(pango_markup ? i3string_escape_markup(win->name) : win->name);
escaped_title = pango_escape_markup(sstrdup((win->name == NULL) ? "" : i3string_as_utf8(win->name)));
buffer_len = buffer_len - strlen("%title") + strlen(escaped_title);
walk += strlen("%title") - 1;
} else if (STARTS_WITH(walk, "%class")) {
if (escaped_class == NULL)
escaped_class = pango_markup ? g_markup_escape_text(win->class_class, -1) : win->class_class;
escaped_class = pango_escape_markup(sstrdup((win->class_class == NULL) ? "" : win->class_class));
buffer_len = buffer_len - strlen("%class") + strlen(escaped_class);
walk += strlen("%class") - 1;
} else if (STARTS_WITH(walk, "%instance")) {
if (escaped_instance == NULL)
escaped_instance = pango_markup ? g_markup_escape_text(win->class_instance, -1) : win->class_instance;
escaped_instance = pango_escape_markup(sstrdup((win->class_instance == NULL) ? "" : win->class_instance));
buffer_len = buffer_len - strlen("%instance") + strlen(escaped_instance);
walk += strlen("%instance") - 1;
@ -403,6 +406,11 @@ i3String *window_parse_title_format(i3Window *win) {
*outwalk = '\0';
i3String *formatted = i3string_from_utf8(buffer);
i3string_set_markup(formatted, pango_markup);
i3string_set_markup(formatted, font_is_pango());
FREE(escaped_title);
FREE(escaped_class);
FREE(escaped_instance);
return formatted;
}