Changes/IBus 1.5.25

IBus 1.5.25

Summary

IBus 1.5.25 will use transfiletriggerin script to generate the cache file instead of posttrans script in each engine package, support the include directive in the user compose file, IBus compose feature will follow the GTK4 compose pre-edit style, the emoji shortcut key will be changed to Ctrl-period, IBus GTK4 module will proceed the key events synchronistically to follow GTK4 specification.

Owner

• Name: Takao Fujiwara
• Email: fujiwara [at] redhat [dot] com

Current status

• Targeted release: Fedora 35
• Last updated: 2021-09-08
• FESCo issue: #2640
• Tracker bug: #1982747
• Release notes tracker: #719

Detailed Description

• Each IBus language engine has run posttrans script to run ibus write-cache to cache their component files in /usr/share/ibus/component whenever the package is installed but ibus write-cache will moved to transfiletriggerin script in IBus core package and the script will be executed only one time per the Fedora installation.
• IBus compose file will support the include directive in the user compose file ($XDG_CONFIG_HOME/ibus/Compose, $XDG_CONFIG_HOME/gtk-3.0/Compose or $HOME/.XCompose)
• IBus compose feature will follow the GTK4 compose pre-edit style.
• IBus emoji shortcut key is Ctrl-Shift-e and it will be changed to Ctrl-period to follow the latest GTK while it's customizable with ibus-setup utility.
• IBus GTK3 module proceeds the key events asynchronistically because some langauge engines spend much time to compose key events and D-Bus process could causes a timeout but now GTK4 does not allow the async events and IBus GTK4 module will proceed the key events synchronistically.

Benefit to Fedora

Users can use the include directive in their compose files. IBus GTK4 module can send the application specific keys of Backspace, Enter to the target application to follow GTK4 specification.

Only one transfiletriggerin script is much simpler than many posttrans scripts.

Scope

• Proposal owners: Update SPEC file to add transfiletriggerin script. Update libibus.so to enhance compose feature. Update org.freedesktop.ibus.gschema.xml for emoji shortcut key. Update libim-ibus.so to fix IBus sync process.

• Other developers: Update SPEC files to delete posttrans script.

• Release engineering: #10184

• Policies and guidelines: N/A

• Trademark approval: N/A

• Alignment with Objectives:

Upgrade/compatibility impact

We should avoid regressions with transfiletriggerin script in the Fedora installation.

How To Test

Installation

1. Install ibus and the language engine packages
2. ibus read-cache --system shows the installed engines.
3. rpm -q --scripts does not show ibus write-cache in engine packages
4. rpm -q --filetriggers shows ibus write-cache in ibus package

Compose

1. Write the line of 'include "%H/foo.compose"' in your $HOME/.XCompose and some compose sequences in $HOME/foo.compose
2. Run gnome-control-center keyboard and configure some IBus language engines besides XKB engines, likes ibus-hangul, ibus-typing-booster
3. Enable an XKB engine with Super-space or clicking of the keyboard idicator in GNOME
4. Launch gedit
5. Confirm your compose sequences in $HOME/foo.compose is reflected
6. Confirm compose preedit is short

Emoji

1. Run gnome-control-center keyboard and configure some IBus language engines besides XKB engines, likes ibus-hangul, ibus-typing-booster
2. Enable an XKB engine with Super-space or clicking of the keyboard idicator in GNOME
3. Launch gedit
4. Type Ctrl-period
5. Confirm emoji pre-edit and lookup table is available

Gtk4

1. Install gtk4-devel-tools (gtk4-devel for older releases)
2. Run env GTK_IM_MODULE=ibus gtk4-demo
3. Backspace, Enter keys works

User Experience

The emoji shortcut key is changed if users do not customize it but they can customize it with ibus-setup utility.

Dependencies

ibus-anthy, ibus-chewing, ibus-hangul, ibus-input-pad, ibus-kkc, ibus-libpinyin, ibus-rawcode, ibus-sayura, ibus-skk, ibus-table, ibus-typing-booster, mozc (posttrans script has already been deleted in each engine package in Fedora rawhide.)

Contingency Plan

• Contingency mechanism: Revert the change to IBus.
• Contingency deadline: Beta release
• Blocks release? No

Documentation

TBD