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Dismiss Android Back key events that are canceled

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* java/org/gnu/emacs/EmacsWindow.java (onKeyDown): Disregard
KEYCODE_BACK events.
(onKeyUp): If the event is KEYCODE_BACK, deliver the disregarded
key press event, unless FLAG_CANCELED is set.
This commit is contained in:
Po Lu 2023-11-25 10:40:13 +08:00
parent 505edceaf4
commit 207ee7f988
1 changed files with 31 additions and 6 deletions
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37
java/org/gnu/emacs/EmacsWindow.java
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@ -648,6 +648,21 @@ private static class Coordinate
long serial;
String characters;
if (keyCode == KeyEvent.KEYCODE_BACK)
{
/* New Android systems display Back navigation buttons on a
row of virtual buttons at the bottom of the screen. These
buttons function much as physical buttons do, in that key
down events are produced when a finger taps them, even if
the finger is not ultimately released after the OS's
gesture navigation is activated.
Deliver onKeyDown events in onKeyUp instead, so as not to
navigate backwards during gesture navigation. */
return;
}
state = eventModifiers (event);
/* Ignore meta-state understood by Emacs for now, or key presses
@ -677,7 +692,7 @@ private static class Coordinate
public void
onKeyUp (int keyCode, KeyEvent event)
{
int state, state_1;
int state, state_1, unicode_char;
long time;
/* Compute the event's modifier mask. */
@ -691,11 +706,21 @@ private static class Coordinate
= state & ~(KeyEvent.META_ALT_MASK | KeyEvent.META_CTRL_MASK
| KeyEvent.META_SYM_ON | KeyEvent.META_META_MASK);
EmacsNative.sendKeyRelease (this.handle,
event.getEventTime (),
state, keyCode,
getEventUnicodeChar (event,
state_1));
unicode_char = getEventUnicodeChar (event, state_1);
if (keyCode == KeyEvent.KEYCODE_BACK)
{
/* If the key press's been canceled, return immediately. */
if ((event.getFlags () & KeyEvent.FLAG_CANCELED) != 0)
return;
EmacsNative.sendKeyPress (this.handle, event.getEventTime (),
state, keyCode, unicode_char);
}
EmacsNative.sendKeyRelease (this.handle, event.getEventTime (),
state, keyCode, unicode_char);
if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)
{