** Also affects: gtk+3.0 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1864561
Title:
For GDK_HYPER_MASK, gtk_im_context_filter_keypress() falsely reports
that IM handled the event
Status in gtk+3.0 package in Ubuntu:
New
Status in ibus package in Ubuntu:
New
Bug description:
If the keypress event contains GDK_HYPER_MASK as a modifier,
gtk_im_context_filter_keypress() returns true, reporting that the IM
handled the event, even though it did not, therefore it should return
false.
Background: We are working on modifying Gnome-Terminal / libvte-2.91.so.0 to
enable Terminal-bespoke remapping of modifier keys. This is to facilitate OS X
users to migrate to Ubuntu. (Discussion here: #220. Background and unsuccessful
alternative approaches detailed here:
https://github.com/bjohas/Ubuntu-keyboard-map-like-OS-X/blob/master/README.md).
When we replace GDK_CONTROL_MASK by GDK_HYPER_MASK, the input method (ibus)
reports that it handled the event that had Hyper as the modifier. When we use
export GTK_IM_MODULE=xim, the Hyper modifier is passed as expected.
We believe that this is a bug in ibus XOR gtk. Unfortunately I'm not
sure whether this is an issue in ibus or gtk, so I'm reporting it in
both places (as well as upstream). Apologies for the inconvenience
caused by this. Many thanks for looking at this.
I'll track updates here
https://gitlab.gnome.org/GNOME/gnome-terminal/issues/220
and here
https://github.com/bjohas/Ubuntu-keyboard-map-like-OS-X/blob/master/Building%20a%20Gnome-Hyper-Terminal.md
so that people compinging Gnonme Terminal are aware of the status.
Many thanks!
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