Adam Williamson
6 years ago
parent
b8905959cc
commit
517441da45
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From 66138b4e5f308cb0a9e93faa8aebf893a30f35ec Mon Sep 17 00:00:00 2001
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From: Adam Williamson <awilliam@redhat.com>
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Date: Fri, 5 Jul 2019 15:06:55 -0700
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Subject: [PATCH] VNC: reverse key order when sending key up events
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When map_and_send_key maps an input to multiple key presses -
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e.g. a ':' requires a press of shift and a press of ';', or
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when dealing with any input like "ctrl-t" - it gets an array,
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sends a 'down' event for each key in the array, then sends an
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'up' event for each key in the array. So for our ctrl-t example
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it does this:
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ctrl down
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t down
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ctrl up
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t up
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This is a bit odd and not how humans normally type. Humans
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would normally hold the modifier key, press and release any
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modified keys they want to press, then release the modifier.
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I've run into one issue previously where this caused a problem,
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which was ultimately fixed in qemu so that os-autoinst's unusual
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key event order worked OK. Now I've run into another:
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https://bugzilla.redhat.com/show_bug.cgi?id=1727388
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All the details of that bug are still not worked out, but today
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I *did* work out that changing this key press order avoids that
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bug. By simply reversing the array for the key up events, so we
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do this instead:
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ctrl down
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t down
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t up
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ctrl up
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The bug stops happening. Since it's triggered two bugs now, and
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as I said it does not map to how humans type, I think we should
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really go ahead and change this.
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Signed-off-by: Adam Williamson <awilliam@redhat.com>
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---
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consoles/VNC.pm | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/consoles/VNC.pm b/consoles/VNC.pm
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index 8eaefe0a..2dfc7a38 100644
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--- a/consoles/VNC.pm
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+++ b/consoles/VNC.pm
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@@ -759,7 +759,7 @@ sub map_and_send_key {
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}
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usleep(2_000);
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if (!defined $down_flag || $down_flag == 0) {
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- for my $key (@events) {
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+ for my $key (reverse @events) {
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$self->send_key_event_up($key);
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}
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}
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--
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2.22.0
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