runtime_env.go RawHistoryFolder

1package bootstrap
2
3import (
4	"fmt"
5	"io"
6	"os"
7)
8
9// ApplyGTKIMModuleFallback sets GTK_IM_MODULE to "gtk-im-context-simple" when:
10//   - GTK_IM_MODULE is unset, AND
11//   - the session appears to be Wayland (XDG_SESSION_TYPE == "wayland" OR WAYLAND_DISPLAY != "").
12//
13// This ensures dead-key compose works on Wayland compositors that lack text-input-v3
14// (e.g. niri), without overriding an explicit user choice.
15//
16// The getter and setter parameters allow injection for testing; pass os.Getenv and
17// os.Setenv for production use.
18func ApplyGTKIMModuleFallback(stderr io.Writer, getter func(string) string, setter func(string, string) error) {
19	if getter("GTK_IM_MODULE") != "" {
20		return
21	}
22	isWayland := getter("XDG_SESSION_TYPE") == "wayland" || getter("WAYLAND_DISPLAY") != ""
23	if !isWayland {
24		return
25	}
26	_, _ = fmt.Fprintf(stderr, "dumber: GTK_IM_MODULE unset, defaulting to gtk-im-context-simple for dead-key support\n")
27	if err := setter("GTK_IM_MODULE", "gtk-im-context-simple"); err != nil {
28		_, _ = fmt.Fprintf(stderr, "dumber: failed to set GTK_IM_MODULE: %v\n", err)
29	}
30}
31
32// ApplyGTKIMModuleFallbackDefault calls ApplyGTKIMModuleFallback with os.Getenv and os.Setenv.
33func ApplyGTKIMModuleFallbackDefault(stderr io.Writer) {
34	ApplyGTKIMModuleFallback(stderr, os.Getenv, os.Setenv)
35}