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imwayland: Tweak preedit text

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Tweak the preedit text we get from IBus (via the compositor) to
match what GtkIMContextSimple produces for Compose sequences now.

This provides a unified experience.
This commit is contained in:
Matthias Clasen 2021-02-18 11:31:04 -05:00
parent 4327a866f4
commit d84a028455
1 changed files with 33 additions and 1 deletions
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34
gtk/gtkimcontextwayland.c
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@ -570,6 +570,38 @@ gtk_im_context_wayland_set_client_widget (GtkIMContext *context,
}
}
/* We want a unified experience between GtkIMContextSimple and IBus / Wayland
* when it comes to Compose sequences. IBus initial implementation of preedit
* for Compose sequences shows U+2384, which has been described as 'distracting'.
* This function tries to detect this case, and tweaks the text to match what
* GtkIMContextSimple produces.
*/
static char *
tweak_preedit (const char *text)
{
GString *s;
guint len;
s = g_string_new ("");
len = g_utf8_strlen (text, -1);
for (const char *p = text; *p; p = g_utf8_next_char (p))
{
gunichar ch = g_utf8_get_char (p);
if (ch == 0x2384)
{
if (len == 1 || p > text)
g_string_append (s, "·");
}
else
g_string_append_unichar (s, ch);
}
return g_string_free (s, FALSE);
}
static void
gtk_im_context_wayland_get_preedit_string (GtkIMContext *context,
char **str,
@ -599,7 +631,7 @@ gtk_im_context_wayland_get_preedit_string (GtkIMContext *context,
context_wayland->current_preedit.text ? context_wayland->current_preedit.text : "";
if (str)
*str = g_strdup (preedit_str);
*str = tweak_preedit (preedit_str);
if (cursor_pos)
*cursor_pos = g_utf8_strlen (preedit_str,
context_wayland->current_preedit.cursor_begin);