Actually, it has something to do with the editor, because the editor has not been internationalized. Take sublime text 3 as an example. In fact, the official Linux version does not have a compatible input method at all.

Take gtk2 as an example. To make the program support input method, you must first have an input method contextGtkIMContext *im_context, and then you need to manually activate this input method context when you get focus:

gtk_im_context_focus_in(im_context);

Not only that, but also monitor various signals, such as input content updates, associated words, commits, etc...

Finally, you can also tell the input method through this method where my current cursor is, and your input method should adjust according to the position I gave:

void gtk_im_context_set_cursor_location(GtkIMContext *context,
                                        GdkRectangle *area);

Many editors have input method compatibility issues under Linux. After all, people only need to input English and do not need an input method. They are too lazy to do so much, and there is no way to test it after doing so much. And there are some differences between fcitx and ibus.

Terminals and browsers are all made by Ubuntu, Google, and Mozilla. They have dedicated international teams, and of course they have to do a better job.

Finally add the API: https://www.gtk.org/api/2.6/g...

It seems that the official has not solved this problem yet; the author can try to install itIMESupport，不过IMESupportThis plug-in is now missing under PackageControl. . . (ノ﹏ヽ)

See if the editor has set the encoding to UTF8