Red Hat Bugzilla – Bug 71937
gdm word wrap problem for CJK
Last modified: 2007-04-18 12:45:40 EDT
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020528
Description of problem:
When I input wrong username or password into gdm, it will
show up the long error message on the root window, but
it won't word wrap for CJK strings, so users cannot see
the whole error message.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Use gdm in Japanese mode
2.Input wrong username/password
3.error messsage is too wide
Actual Results: No word wrap
Expected Results: It should word wrap
Probably just a matter of pango_layout_set_width() on the relevant PangoLayout
Perhaps it's just the redhat theme, to me it seems nothing is cut off (but I
can't read japanese so I can't really tell) ... try it with the circles theme.
jrb said there was a way to handle this in the theme - alex do you remember how
to do it? we need to let garrett know.
I don't understand why it's wrapping the english string but not the japanese.
maybe the japanese text is just longer without good word breaks? German also
overflows the boxes.
the fix I had in mind was a way to grow the boxes in the theme as the text grows.
Hmm? Isn't the problem already that the box grows to much?
I tried to set the width on the pam-error text, but that didn't seem to help.
maybe pango just doesn't word wrap for japanese at all?
Japanese sentence doesn't need any white space even if it's long.
Right but Pango's word wrap code is way more complicated than just a whitespace
thing. It has special cases for Japanese as recommended by the Unicode book.
Maybe look at pango/pango/break.c and see if it is working correctly. Does it work
in message and error dialogs? If it works there it should work in gdm, if gdm
enables word wrap.
The relevant pango code is:
if (current_word_type == WordLetters)
/* Japanese special cases for ending the word */
if (JAPANESE (last_word_letter) ||
if ((HIRAGANA (last_word_letter) &&
!HIRAGANA (wc)) ||
(KATAKANA (last_word_letter) &&
!(KATAKANA (wc) || HIRAGANA (wc))) ||
(KANJI (last_word_letter) &&
!(HIRAGANA (wc) || KANJI (wc))) ||
(JAPANESE (last_word_letter) &&
!JAPANESE (wc)) ||
(!JAPANESE (last_word_letter) &&
attrs[i].is_word_end = TRUE;
Eh, bad alex - not using Pango. I'm working on a hack here.
static char *
break_at (const char *orig, int len)
char *text, *p, *newline;
text = g_strdup (orig);
p = text;
while (strlen (p) > len)
newline = strchr (p, '\n');
if (newline &&
((newline - p) < len))
p = newline + 1;
for (i = MIN (len, strlen (p)-1); i > 0; i--)
if (p[i] == ' ')
p[i] = '\n';
p = p + i + 1;
/* No place to break. give up */
p = p + 80;
18.104.22.168-8 should fix.
Fix confirmed with gdm-22.214.171.124-10.