By the way... absolutely independently from terminals... U+17d2 is a combining accent. When I checked (many years ago), major graphical toolkits (e.g. GTK and QT) disagreed whether the backspace keypress should delete only the combining accent, or the entire glyph (base character + combining accents) at once. GTK did one, QT did the other (I can't recall which one did which).
I don't know if the world has changed since and has settled with one of these behaviors, having found out that one of these behaviors is clearly superior to the other. I would _guess_ that not much has changed. That is, both possible behaviors are reasonable, both have their pros and cons, and probably you cannot claim that the behavior _must_ be the one you're looking for. If your input method cannot generate the symbols you need, and you need to press backspace as a workaround to get that, moreover, you need to rely on one particular behavior of backspace, then I'd argue that it's all the fault of your input method, it should be able to produce straight away whatever you wish to end up with. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-terminal in Ubuntu. https://bugs.launchpad.net/bugs/2051371 Title: Backspace in gnome-terminal often deletes cluster Status in gnome-terminal package in Ubuntu: New Bug description: If I have ខែ្ (U+1781 U+17c2 U+17d2) in the terminal and press backspace, the first backspace deletes U+17c2 U+17d2 so that I'm left with ខ (U+1781). Instead it should only delete the last codepoint, U+17d2. If I have ខែ (U+1781 U+17c2) a backspace deletes only U+17c2, similarly if I have ខ្ (U+1781 U+17d2) where the backspace deletes U+17d2. Further investigations show that backspace often deletes the entire cluster, i.e. diacritic(s) plus the base character, for example with x̣́ (U+0078 U+0301 U+0323) where a backspace deletes all three codepoints. gnome-terminal should only delete the last codepoint [1]. A real live example where this behavior is problematic is when using ibus-keyman with the Khmer Angkor keyboard [2]. When typing xEjmr the expected output is ខ្មែរ (U+1781 U+17d2 U+1798 U+17c2 U+179a). Keyman does some reordering while typing to put the codepoints in a standardized order. Because gnome-terminal lacks support for surrounding text, the codepoints have to be deleted by emitting several backspace keypresses. Because of the deletion of the cluster the result in gnome-terminal is ្មែរ (U+17d2 U+1798 U+17c2 U+179a). [1] https://github.com/keymanapp/keyman/wiki/Backspace-and-cluster-deletion [2] https://github.com/keymanapp/keyman/issues/10481 ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: gnome-terminal 3.44.0-1ubuntu1 [modified: usr/libexec/gnome-terminal-server] ProcVersionSignature: Ubuntu 6.5.0-14.14~22.04.1-generic 6.5.3 Uname: Linux 6.5.0-14-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri Jan 26 12:21:42 2024 InstallationDate: Installed on 2022-04-12 (653 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1) SourcePackage: gnome-terminal UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2051371/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
