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Handle the Ctrl modifier key ourselves if necessary.

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The Quartz GDK back end, if you press (say) Ctrl-A, will generate a
GdkKeyEvent with keyval='a' and state=CONTROL, but it'll have a
translated string of "a" where the X back end would have returned
"\001". So we have to do our own translation, which fortunately isn't
hard.
This commit is contained in:
Simon Tatham 2015-08-31 13:00:42 +01:00
parent 69737b24b5
commit 7acb747a7d
1 changed files with 27 additions and 0 deletions
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27
unix/gtkwin.c
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@ -1042,6 +1042,33 @@ gint key_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
end = 2;
}
/* Some GTK backends (e.g. Quartz) do not change event->string
* in response to the Control modifier. So we do it ourselves
* here, if it's not already happened.
*
* The translations below are in line with X11 policy as far
* as I know. */
if ((event->state & GDK_CONTROL_MASK) && end == 2) {
if (output[1] >= '3' && output[1] <= '7') {
/* ^3,...,^7 map to 0x1B,...,0x1F */
output[1] += '\x1B' - '3';
} else if (output[1] == '2') {
/* ^2 is ^@, i.e. \0 */
output[1] = '\0';
} else if (output[1] == '8') {
/* ^8 is DEL */
output[1] = '\x7F';
} else if (output[1] == '/') {
/* ^/ is the same as ^_ */
output[1] = '\x1F';
} else if (output[1] >= 0x40 && output[1] < 0x7F) {
/* Everything anywhere near the alphabetics just gets
* masked. */
output[1] &= 0x1F;
}
/* Anything else, e.g. '0', is unchanged. */
}
/* Control-Break sends a Break special to the backend */
if (event->keyval == GDK_KEY_Break &&
(event->state & GDK_CONTROL_MASK)) {