203231 - No keypress event generated for some Ctrl+Shift+<number> combinations

Status: NEW

(Core :: DOM: Events, defect, P5)

Description

[David Ascher]

Summary:  Ctrl+Shift+6 and Ctrl+Shift+2 result in keypress events but all the 
other Ctrl+Shift+<number> keys don't.

The attached XUL is a little demo window that logs keydown/keyup/keypressed 
events when they happen in the textbox.  

Here is an annotated log showing the different:

Ctrl-Shift-2:

keydown-Ctrl-VK_CONTROL
keydown-Ctrl-Shift-VK_SHIFT
keydown-Ctrl-Shift-VK_2
keypress-Ctrl-Shift-@       # Keypress happened
keyup-Ctrl-Shift-VK_2
keyup-Ctrl-VK_SHIFT
keyup-VK_CONTROL

vs. Ctrl-Shift-3:

keydown-Ctrl-VK_CONTROL
keydown-Ctrl-Shift-VK_SHIFT
keydown-Ctrl-Shift-VK_3
keyup-Ctrl-Shift-VK_3
keyup-Shift-VK_CONTROL
keyup-VK_SHIFT

Note that in the latter case, no keypress event was generated.

This bug has been introduced since 0.9.5.

Comment 1

[David Ascher]

Attachment: XUL window which can be used to verify the bug

Patch showing the bug on the trunk.

Comment 2

[David Ascher]

Investigation shows that in 0.9.5, the behavior was different but equally 
strange:

keydown-Shift-VK_SHIFT
keydown-Ctrl-Shift-VK_CONTROL
keydown-Ctrl-Shift-VK_1
keypress-Ctrl-Shift-1  # reasonable
keyup-Ctrl-Shift-VK_1
keyup-Ctrl-VK_SHIFT
keyup-VK_CONTROL


keydown-Shift-VK_SHIFT
keydown-Ctrl-Shift-VK_CONTROL
keydown-Ctrl-Shift-VK_2
keypress-Ctrl-Shift-2   # reasonable
keypress-Ctrl-Shift-@   # also reasonable, but both???
keyup-Ctrl-Shift-VK_2
keyup-Ctrl-VK_SHIFT
keyup-VK_CONTROL

Comment 3

[Hermann Schwab]

testcase XUL window bit-rotten?
Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.9a1) Gecko/20051106 SeaMonkey/1.5a

patch in unconfirmed Bug 315328 
ctrl+shift+2|6 behave different than other ctrl+shift+number keys

Comment 4

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046

Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5.

If you have questions, please contact :mdaly.