cefff2ca25
Upstream EXWM is now sort-of unmaintained[0], but some important PRs are pending[1] which I would like to absorb here somehow. [0]: https://github.com/ch11ng/exwm/issues/845 [1]: https://github.com/ch11ng/exwm/pull/848 git-subtree-dir: third_party/exwm git-subtree-mainline:7894d7e178git-subtree-split:0368127976Change-Id: I078358c0ea1d2bac99111748ce9c137d2804ac4e
800 lines
35 KiB
EmacsLisp
800 lines
35 KiB
EmacsLisp
;;; exwm-xim.el --- XIM Module for EXWM -*- lexical-binding: t -*-
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;; Copyright (C) 2019-2020 Free Software Foundation, Inc.
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;; Author: Chris Feng <chris.w.feng@gmail.com>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module adds XIM support for EXWM and allows sending characters
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;; generated by any Emacs's builtin input method (info node `Input Methods')
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;; to X windows.
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;; This module is essentially an X input method server utilizing Emacs as
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;; its backend. It talks with X windows through the XIM protocol. The XIM
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;; protocol is quite flexible by itself, stating that an implementation can
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;; create network connections of various types as well as make use of an
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;; existing X connection for communication, and that an IM server may
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;; support multiple transport versions, various input styles and several
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;; event flow modals, etc. Here we only make choices that are most popular
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;; among other IM servers and more importantly, practical for Emacs to act
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;; as an IM server:
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;;
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;; + Packets are transported on top of an X connection like most IMEs.
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;; + Only transport version 0.0 (i.e. only-CM & Property-with-CM) is
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;; supported (same as "IM Server Developers Kit", adopted by most IMEs).
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;; + Only support static event flow, on-demand-synchronous method.
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;; + Only "root-window" input style is supported.
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;; To use this module, first load and enable it as follows:
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;;
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;; (require 'exwm-xim)
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;; (exwm-xim-enable)
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;;
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;; A keybinding for `toggle-input-method' is probably required to turn on &
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;; off an input method (default to `default-input-method'). It's bound to
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;; 'C-\' by default and can be made reachable when working with X windows:
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;;
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;; (push ?\C-\\ exwm-input-prefix-keys)
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;;
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;; It's also required (and error-prone) to setup environment variables to
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;; make applications actually use this input method. Typically the
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;; following lines should be inserted into '~/.xinitrc'.
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;;
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;; export XMODIFIERS=@im=exwm-xim
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;; export GTK_IM_MODULE=xim
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;; export QT_IM_MODULE=xim
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;; export CLUTTER_IM_MODULE=xim
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;; References:
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;; + XIM (http://www.x.org/releases/X11R7.6/doc/libX11/specs/XIM/xim.html)
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;; + IMdkit (http://xorg.freedesktop.org/archive/unsupported/lib/IMdkit/)
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;; + UIM (https://github.com/uim/uim)
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(require 'xcb-keysyms)
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(require 'xcb-xim)
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(require 'exwm-core)
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(require 'exwm-input)
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(defconst exwm-xim--locales
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"@locale=\
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aa,af,ak,am,an,anp,ar,as,ast,ayc,az,be,bem,ber,bg,bhb,bho,bn,bo,br,brx,bs,byn,\
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ca,ce,cmn,crh,cs,csb,cv,cy,da,de,doi,dv,dz,el,en,es,et,eu,fa,ff,fi,fil,fo,fr,\
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fur,fy,ga,gd,gez,gl,gu,gv,ha,hak,he,hi,hne,hr,hsb,ht,hu,hy,ia,id,ig,ik,is,it,\
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iu,iw,ja,ka,kk,kl,km,kn,ko,kok,ks,ku,kw,ky,lb,lg,li,li,lij,lo,lt,lv,lzh,mag,\
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mai,mg,mhr,mi,mk,ml,mn,mni,mr,ms,mt,my,nan,nb,nds,ne,nhn,niu,nl,nn,nr,nso,oc,\
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om,or,os,pa,pa,pap,pl,ps,pt,quz,raj,ro,ru,rw,sa,sat,sc,sd,se,shs,si,sid,sk,sl,\
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so,sq,sr,ss,st,sv,sw,szl,ta,tcy,te,tg,th,the,ti,tig,tk,tl,tn,tr,ts,tt,ug,uk,\
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unm,ur,uz,ve,vi,wa,wae,wal,wo,xh,yi,yo,yue,zh,zu,\
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C,no"
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"All supported locales (stolen from glibc).")
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(defconst exwm-xim--default-error
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(make-instance 'xim:error
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:im-id 0
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:ic-id 0
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:flag xim:error-flag:invalid-both
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:error-code xim:error-code:bad-something
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:length 0
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:type 0
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:detail nil)
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"Default error returned to clients.")
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(defconst exwm-xim--default-im-attrs
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(list (make-instance 'xim:XIMATTR
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:id 0
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:type xim:ATTRIBUTE-VALUE-TYPE:xim-styles
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:length (length xlib:XNQueryInputStyle)
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:attribute xlib:XNQueryInputStyle))
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"Default IM attrs returned to clients.")
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(defconst exwm-xim--default-ic-attrs
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(list (make-instance 'xim:XICATTR
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:id 0
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:type xim:ATTRIBUTE-VALUE-TYPE:long-data
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:length (length xlib:XNInputStyle)
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:attribute xlib:XNInputStyle)
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(make-instance 'xim:XICATTR
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:id 1
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:type xim:ATTRIBUTE-VALUE-TYPE:window
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:length (length xlib:XNClientWindow)
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:attribute xlib:XNClientWindow)
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;; Required by e.g. xterm.
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(make-instance 'xim:XICATTR
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:id 2
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:type xim:ATTRIBUTE-VALUE-TYPE:window
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:length (length xlib:XNFocusWindow)
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:attribute xlib:XNFocusWindow))
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"Default IC attrs returned to clients.")
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(defconst exwm-xim--default-styles
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(make-instance 'xim:XIMStyles
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:number nil
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:styles (list (logior xlib:XIMPreeditNothing
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xlib:XIMStatusNothing)))
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"Default styles: root-window, i.e. no preediting or status display support.")
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(defconst exwm-xim--default-attributes
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(list (make-instance 'xim:XIMATTRIBUTE
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:id 0
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:length nil
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:value exwm-xim--default-styles))
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"Default IM/IC attributes returned to clients.")
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(defvar exwm-xim--conn nil
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"The X connection for initiating other XIM connections.")
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(defvar exwm-xim--event-xwin nil
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"X window for initiating new XIM connections.")
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(defvar exwm-xim--server-client-plist '(nil nil)
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"Plist mapping server window to [X connection, client window, byte-order].")
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(defvar exwm-xim--client-server-plist '(nil nil)
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"Plist mapping client window to server window.")
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(defvar exwm-xim--property-index 0 "For generating a unique property name.")
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(defvar exwm-xim--im-id 0 "Last IM ID.")
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(defvar exwm-xim--ic-id 0 "Last IC ID.")
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;; X11 atoms.
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(defvar exwm-xim--@server nil)
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(defvar exwm-xim--LOCALES nil)
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(defvar exwm-xim--TRANSPORT nil)
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(defvar exwm-xim--XIM_SERVERS nil)
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(defvar exwm-xim--_XIM_PROTOCOL nil)
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(defvar exwm-xim--_XIM_XCONNECT nil)
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(defun exwm-xim--on-SelectionRequest (data _synthetic)
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"Handle SelectionRequest events on IMS window.
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Such events would be received when clients query for LOCALES or TRANSPORT."
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(exwm--log)
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(let ((evt (make-instance 'xcb:SelectionRequest))
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value fake-event)
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(xcb:unmarshal evt data)
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(with-slots (time requestor selection target property) evt
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(setq value (cond ((= target exwm-xim--LOCALES)
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;; Return supported locales.
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exwm-xim--locales)
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((= target exwm-xim--TRANSPORT)
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;; Use XIM over an X connection.
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"@transport=X/")))
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(when value
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;; Change the property.
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(xcb:+request exwm-xim--conn
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(make-instance 'xcb:ChangeProperty
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:mode xcb:PropMode:Replace
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:window requestor
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:property property
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:type target
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:format 8
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:data-len (length value)
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:data value))
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;; Send a SelectionNotify event.
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(setq fake-event (make-instance 'xcb:SelectionNotify
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:time time
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:requestor requestor
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:selection selection
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:target target
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:property property))
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(xcb:+request exwm-xim--conn
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(make-instance 'xcb:SendEvent
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:propagate 0
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:destination requestor
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal fake-event exwm-xim--conn)))
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(xcb:flush exwm-xim--conn)))))
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(cl-defun exwm-xim--on-ClientMessage-0 (data _synthetic)
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"Handle ClientMessage event on IMS window (new connection).
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Such events would be received when clients request for _XIM_XCONNECT.
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A new X connection and server window would be created to communicate with
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this client."
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(exwm--log)
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(let ((evt (make-instance 'xcb:ClientMessage))
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conn client-xwin server-xwin)
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(xcb:unmarshal evt data)
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(with-slots (window type data) evt
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(unless (= type exwm-xim--_XIM_XCONNECT)
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;; Only handle _XIM_XCONNECT.
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(exwm--log "Ignore ClientMessage %s" type)
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(cl-return-from exwm-xim--on-ClientMessage-0))
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(setq client-xwin (elt (slot-value data 'data32) 0)
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;; Create a new X connection and a new server window.
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conn (xcb:connect)
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server-xwin (xcb:generate-id conn))
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(set-process-query-on-exit-flag (slot-value conn 'process) nil)
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;; Store this client.
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(plist-put exwm-xim--server-client-plist server-xwin
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`[,conn ,client-xwin nil])
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(plist-put exwm-xim--client-server-plist client-xwin server-xwin)
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;; Select DestroyNotify events on this client window.
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(xcb:+request exwm-xim--conn
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(make-instance 'xcb:ChangeWindowAttributes
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:window client-xwin
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:value-mask xcb:CW:EventMask
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:event-mask xcb:EventMask:StructureNotify))
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(xcb:flush exwm-xim--conn)
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;; Handle ClientMessage events from this new connection.
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(xcb:+event conn 'xcb:ClientMessage #'exwm-xim--on-ClientMessage)
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;; Create a communication window.
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(xcb:+request conn
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(make-instance 'xcb:CreateWindow
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:depth 0
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:wid server-xwin
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:parent exwm--root
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:x 0
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:y 0
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:width 1
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:height 1
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:border-width 0
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:class xcb:WindowClass:InputOutput
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:visual 0
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:value-mask xcb:CW:OverrideRedirect
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:override-redirect 1))
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(xcb:flush conn)
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;; Send connection establishment ClientMessage.
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(setf window client-xwin
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(slot-value data 'data32) `(,server-xwin 0 0 0 0))
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(slot-makeunbound data 'data8)
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(slot-makeunbound data 'data16)
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(xcb:+request exwm-xim--conn
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(make-instance 'xcb:SendEvent
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:propagate 0
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:destination client-xwin
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal evt exwm-xim--conn)))
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(xcb:flush exwm-xim--conn))))
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(cl-defun exwm-xim--on-ClientMessage (data _synthetic)
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"Handle ClientMessage event on IMS communication window (request).
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Such events would be received when clients request for _XIM_PROTOCOL.
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The actual XIM request is in client message data or a property."
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(exwm--log)
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(let ((evt (make-instance 'xcb:ClientMessage))
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conn client-xwin server-xwin)
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(xcb:unmarshal evt data)
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(with-slots (format window type data) evt
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(unless (= type exwm-xim--_XIM_PROTOCOL)
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(exwm--log "Ignore ClientMessage %s" type)
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(cl-return-from exwm-xim--on-ClientMessage))
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(setq server-xwin window
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conn (plist-get exwm-xim--server-client-plist server-xwin)
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client-xwin (elt conn 1)
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conn (elt conn 0))
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(cond ((= format 8)
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;; Data.
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(exwm-xim--on-request (vconcat (slot-value data 'data8))
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conn client-xwin server-xwin))
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((= format 32)
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;; Atom.
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(with-slots (data32) data
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(with-slots (value)
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(xcb:+request-unchecked+reply conn
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(make-instance 'xcb:GetProperty
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:delete 1
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:window server-xwin
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:property (elt data32 1)
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:type xcb:GetPropertyType:Any
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:long-offset 0
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:long-length (elt data32 0)))
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(when (> (length value) 0)
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(exwm-xim--on-request value conn client-xwin
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server-xwin)))))))))
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(defun exwm-xim--on-request (data conn client-xwin server-xwin)
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"Handle an XIM reuqest."
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(exwm--log)
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(let ((opcode (elt data 0))
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;; Let-bind `xim:lsb' to make pack/unpack functions work correctly.
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(xim:lsb (elt (plist-get exwm-xim--server-client-plist server-xwin) 2))
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req replies)
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(cond ((= opcode xim:opcode:error)
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(exwm--log "ERROR: %s" data))
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((= opcode xim:opcode:connect)
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(exwm--log "CONNECT")
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(setq xim:lsb (= (elt data 4) xim:connect-byte-order:lsb-first))
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;; Store byte-order.
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(setf (elt (plist-get exwm-xim--server-client-plist server-xwin) 2)
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xim:lsb)
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(setq req (make-instance 'xim:connect))
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(xcb:unmarshal req data)
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(if (and (= (slot-value req 'major-version) 1)
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(= (slot-value req 'minor-version) 0)
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;; Do not support authentication.
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(= (slot-value req 'number) 0))
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;; Accept the connection.
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(push (make-instance 'xim:connect-reply) replies)
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;; Deny it.
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(push exwm-xim--default-error replies)))
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((memq opcode (list xim:opcode:auth-required
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xim:opcode:auth-reply
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xim:opcode:auth-next
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xim:opcode:auth-ng))
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(exwm--log "AUTH: %d" opcode)
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;; Deny any attempt to make authentication.
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(push exwm-xim--default-error replies))
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((= opcode xim:opcode:disconnect)
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(exwm--log "DISCONNECT")
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;; Gracefully disconnect from the client.
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(exwm-xim--make-request (make-instance 'xim:disconnect-reply)
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conn client-xwin)
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;; Destroy the communication window & connection.
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(xcb:+request conn
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(make-instance 'xcb:DestroyWindow
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:window server-xwin))
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(xcb:disconnect conn)
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;; Clean up cache.
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(cl-remf exwm-xim--server-client-plist server-xwin)
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(cl-remf exwm-xim--client-server-plist client-xwin))
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((= opcode xim:opcode:open)
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(exwm--log "OPEN")
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;; Note: We make no check here.
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(setq exwm-xim--im-id (if (< exwm-xim--im-id #xffff)
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(1+ exwm-xim--im-id)
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1))
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(setq replies
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(list
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(make-instance 'xim:open-reply
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:im-id exwm-xim--im-id
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:im-attrs-length nil
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:im-attrs exwm-xim--default-im-attrs
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:ic-attrs-length nil
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:ic-attrs exwm-xim--default-ic-attrs)
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(make-instance 'xim:set-event-mask
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:im-id exwm-xim--im-id
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:ic-id 0
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;; Static event flow.
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:forward-event-mask xcb:EventMask:KeyPress
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;; on-demand-synchronous method.
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:synchronous-event-mask
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xcb:EventMask:NoEvent))))
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((= opcode xim:opcode:close)
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(exwm--log "CLOSE")
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(setq req (make-instance 'xim:close))
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(xcb:unmarshal req data)
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(push (make-instance 'xim:close-reply
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:im-id (slot-value req 'im-id))
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replies))
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((= opcode xim:opcode:trigger-notify)
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(exwm--log "TRIGGER-NOTIFY")
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;; Only static event flow modal is supported.
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(push exwm-xim--default-error replies))
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((= opcode xim:opcode:encoding-negotiation)
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(exwm--log "ENCODING-NEGOTIATION")
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(setq req (make-instance 'xim:encoding-negotiation))
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(xcb:unmarshal req data)
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(let ((index (cl-position "COMPOUND_TEXT"
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(mapcar (lambda (i) (slot-value i 'name))
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(slot-value req 'names))
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:test #'equal)))
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(unless index
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;; Fallback to portable character encoding (a subset of ASCII).
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(setq index -1))
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(push (make-instance 'xim:encoding-negotiation-reply
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:im-id (slot-value req 'im-id)
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:category
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xim:encoding-negotiation-reply-category:name
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:index index)
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replies)))
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((= opcode xim:opcode:query-extension)
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(exwm--log "QUERY-EXTENSION")
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(setq req (make-instance 'xim:query-extension))
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(xcb:unmarshal req data)
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(push (make-instance 'xim:query-extension-reply
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:im-id (slot-value req 'im-id)
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;; No extension support.
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:length 0
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:extensions nil)
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replies))
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((= opcode xim:opcode:set-im-values)
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(exwm--log "SET-IM-VALUES")
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;; There's only one possible input method attribute.
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(setq req (make-instance 'xim:set-im-values))
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(xcb:unmarshal req data)
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(push (make-instance 'xim:set-im-values-reply
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:im-id (slot-value req 'im-id))
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replies))
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((= opcode xim:opcode:get-im-values)
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(exwm--log "GET-IM-VALUES")
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(setq req (make-instance 'xim:get-im-values))
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(let (im-attributes-id)
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(xcb:unmarshal req data)
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(setq im-attributes-id (slot-value req 'im-attributes-id))
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(if (cl-notevery (lambda (i) (= i 0)) im-attributes-id)
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;; Only support one IM attributes.
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(push (make-instance 'xim:error
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:im-id (slot-value req 'im-id)
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||
:ic-id 0
|
||
:flag xim:error-flag:invalid-ic-id
|
||
:error-code xim:error-code:bad-something
|
||
:length 0
|
||
:type 0
|
||
:detail nil)
|
||
replies)
|
||
(push
|
||
(make-instance 'xim:get-im-values-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:length nil
|
||
:im-attributes exwm-xim--default-attributes)
|
||
replies))))
|
||
((= opcode xim:opcode:create-ic)
|
||
(exwm--log "CREATE-IC")
|
||
(setq req (make-instance 'xim:create-ic))
|
||
(xcb:unmarshal req data)
|
||
;; Note: The ic-attributes slot is ignored.
|
||
(setq exwm-xim--ic-id (if (< exwm-xim--ic-id #xffff)
|
||
(1+ exwm-xim--ic-id)
|
||
1))
|
||
(push (make-instance 'xim:create-ic-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id exwm-xim--ic-id)
|
||
replies))
|
||
((= opcode xim:opcode:destroy-ic)
|
||
(exwm--log "DESTROY-IC")
|
||
(setq req (make-instance 'xim:destroy-ic))
|
||
(xcb:unmarshal req data)
|
||
(push (make-instance 'xim:destroy-ic-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id))
|
||
replies))
|
||
((= opcode xim:opcode:set-ic-values)
|
||
(exwm--log "SET-IC-VALUES")
|
||
(setq req (make-instance 'xim:set-ic-values))
|
||
(xcb:unmarshal req data)
|
||
;; We don't distinguish between input contexts.
|
||
(push (make-instance 'xim:set-ic-values-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id))
|
||
replies))
|
||
((= opcode xim:opcode:get-ic-values)
|
||
(exwm--log "GET-IC-VALUES")
|
||
(setq req (make-instance 'xim:get-ic-values))
|
||
(xcb:unmarshal req data)
|
||
(push (make-instance 'xim:get-ic-values-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id)
|
||
:length nil
|
||
:ic-attributes exwm-xim--default-attributes)
|
||
replies))
|
||
((= opcode xim:opcode:set-ic-focus)
|
||
(exwm--log "SET-IC-FOCUS")
|
||
;; All input contexts are the same.
|
||
)
|
||
((= opcode xim:opcode:unset-ic-focus)
|
||
(exwm--log "UNSET-IC-FOCUS")
|
||
;; All input contexts are the same.
|
||
)
|
||
((= opcode xim:opcode:forward-event)
|
||
(exwm--log "FORWARD-EVENT")
|
||
(setq req (make-instance 'xim:forward-event))
|
||
(xcb:unmarshal req data)
|
||
(exwm-xim--handle-forward-event-request req xim:lsb conn
|
||
client-xwin))
|
||
((= opcode xim:opcode:sync)
|
||
(exwm--log "SYNC")
|
||
(setq req (make-instance 'xim:sync))
|
||
(xcb:unmarshal req data)
|
||
(push (make-instance 'xim:sync-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id))
|
||
replies))
|
||
((= opcode xim:opcode:sync-reply)
|
||
(exwm--log "SYNC-REPLY"))
|
||
((= opcode xim:opcode:reset-ic)
|
||
(exwm--log "RESET-IC")
|
||
;; No context-specific data saved.
|
||
(setq req (make-instance 'xim:reset-ic))
|
||
(xcb:unmarshal req data)
|
||
(push (make-instance 'xim:reset-ic-reply
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id)
|
||
:length 0
|
||
:string "")
|
||
replies))
|
||
((memq opcode (list xim:opcode:str-conversion-reply
|
||
xim:opcode:preedit-start-reply
|
||
xim:opcode:preedit-caret-reply))
|
||
(exwm--log "PREEDIT: %d" opcode)
|
||
;; No preedit support.
|
||
(push exwm-xim--default-error replies))
|
||
(t
|
||
(exwm--log "Bad protocol")
|
||
(push exwm-xim--default-error replies)))
|
||
;; Actually send the replies.
|
||
(when replies
|
||
(mapc (lambda (reply)
|
||
(exwm-xim--make-request reply conn client-xwin))
|
||
replies)
|
||
(xcb:flush conn))))
|
||
|
||
(defun exwm-xim--handle-forward-event-request (req lsb conn client-xwin)
|
||
(let ((im-func (with-current-buffer (window-buffer)
|
||
input-method-function))
|
||
key-event keysym keysyms event result)
|
||
;; Note: The flag slot is ignored.
|
||
;; Do conversion in client's byte-order.
|
||
(let ((xcb:lsb lsb))
|
||
(setq key-event (make-instance 'xcb:KeyPress))
|
||
(xcb:unmarshal key-event (slot-value req 'event)))
|
||
(with-slots (detail state) key-event
|
||
(setq keysym (xcb:keysyms:keycode->keysym exwm-xim--conn detail
|
||
state))
|
||
(when (/= (car keysym) 0)
|
||
(setq event (xcb:keysyms:keysym->event
|
||
exwm-xim--conn
|
||
(car keysym)
|
||
(logand state (lognot (cdr keysym)))))))
|
||
(while (or (slot-value req 'event) unread-command-events)
|
||
(unless (slot-value req 'event)
|
||
(setq event (pop unread-command-events))
|
||
;; Handle events in (t . EVENT) format.
|
||
(when (and (consp event)
|
||
(eq (car event) t))
|
||
(setq event (cdr event))))
|
||
(if (or (not im-func)
|
||
;; `list' is the default method.
|
||
(eq im-func #'list)
|
||
(not event)
|
||
;; Select only printable keys.
|
||
(not (integerp event)) (> #x20 event) (< #x7e event))
|
||
;; Either there is no active input method, or invalid key
|
||
;; is detected.
|
||
(with-slots ((raw-event event)
|
||
im-id ic-id serial-number)
|
||
req
|
||
(if raw-event
|
||
(setq event raw-event)
|
||
(setq keysyms (xcb:keysyms:event->keysyms exwm-xim--conn event))
|
||
(with-slots (detail state) key-event
|
||
(setf detail (xcb:keysyms:keysym->keycode exwm-xim--conn
|
||
(caar keysyms))
|
||
state (cdar keysyms)))
|
||
(setq event (let ((xcb:lsb lsb))
|
||
(xcb:marshal key-event conn))))
|
||
(when event
|
||
(exwm-xim--make-request
|
||
(make-instance 'xim:forward-event
|
||
:im-id im-id
|
||
:ic-id ic-id
|
||
:flag xim:commit-flag:synchronous
|
||
:serial-number serial-number
|
||
:event event)
|
||
conn client-xwin)))
|
||
(when (eq exwm--selected-input-mode 'char-mode)
|
||
;; Grab keyboard temporarily for char-mode.
|
||
(exwm-input--grab-keyboard))
|
||
(unwind-protect
|
||
(with-temp-buffer
|
||
;; Always show key strokes.
|
||
(let ((input-method-use-echo-area t)
|
||
(exwm-input-line-mode-passthrough t))
|
||
(setq result (funcall im-func event))
|
||
;; Clear echo area for the input method.
|
||
(message nil)
|
||
;; This also works for portable character encoding.
|
||
(setq result
|
||
(encode-coding-string (concat result)
|
||
'compound-text-with-extensions))
|
||
(exwm-xim--make-request
|
||
(make-instance 'xim:commit-x-lookup-chars
|
||
:im-id (slot-value req 'im-id)
|
||
:ic-id (slot-value req 'ic-id)
|
||
:flag (logior xim:commit-flag:synchronous
|
||
xim:commit-flag:x-lookup-chars)
|
||
:length (length result)
|
||
:string result)
|
||
conn client-xwin)))
|
||
(when (eq exwm--selected-input-mode 'char-mode)
|
||
(exwm-input--release-keyboard))))
|
||
(xcb:flush conn)
|
||
(setf event nil
|
||
(slot-value req 'event) nil))))
|
||
|
||
(defun exwm-xim--make-request (req conn client-xwin)
|
||
"Make an XIM request REQ via connection CONN.
|
||
|
||
CLIENT-XWIN would receive a ClientMessage event either telling the client
|
||
the request data or where to fetch the data."
|
||
(exwm--log)
|
||
(let ((data (xcb:marshal req))
|
||
property format client-message-data client-message)
|
||
(if (<= (length data) 20)
|
||
;; Send short requests directly with client messages.
|
||
(setq format 8
|
||
;; Pad to 20 bytes.
|
||
data (append data (make-list (- 20 (length data)) 0))
|
||
client-message-data (make-instance 'xcb:ClientMessageData
|
||
:data8 data))
|
||
;; Send long requests with properties.
|
||
(setq property (exwm--intern-atom (format "_EXWM_XIM_%x"
|
||
exwm-xim--property-index)))
|
||
(cl-incf exwm-xim--property-index)
|
||
(xcb:+request conn
|
||
(make-instance 'xcb:ChangeProperty
|
||
:mode xcb:PropMode:Append
|
||
:window client-xwin
|
||
:property property
|
||
:type xcb:Atom:STRING
|
||
:format 8
|
||
:data-len (length data)
|
||
:data data))
|
||
;; Also send a client message to notify the client about this property.
|
||
(setq format 32
|
||
client-message-data (make-instance 'xcb:ClientMessageData
|
||
:data32 `(,(length data)
|
||
,property
|
||
;; Pad to 20 bytes.
|
||
0 0 0))))
|
||
;; Send the client message.
|
||
(setq client-message (make-instance 'xcb:ClientMessage
|
||
:format format
|
||
:window client-xwin
|
||
:type exwm-xim--_XIM_PROTOCOL
|
||
:data client-message-data))
|
||
(xcb:+request conn
|
||
(make-instance 'xcb:SendEvent
|
||
:propagate 0
|
||
:destination client-xwin
|
||
:event-mask xcb:EventMask:NoEvent
|
||
:event (xcb:marshal client-message conn)))))
|
||
|
||
(defun exwm-xim--on-DestroyNotify (data synthetic)
|
||
"Do cleanups on receiving DestroyNotify event.
|
||
|
||
Such event would be received when the client window is destroyed."
|
||
(exwm--log)
|
||
(unless synthetic
|
||
(let ((evt (make-instance 'xcb:DestroyNotify))
|
||
conn client-xwin server-xwin)
|
||
(xcb:unmarshal evt data)
|
||
(setq client-xwin (slot-value evt 'window)
|
||
server-xwin (plist-get exwm-xim--client-server-plist client-xwin))
|
||
(when server-xwin
|
||
(setq conn (aref (plist-get exwm-xim--server-client-plist server-xwin)
|
||
0))
|
||
(cl-remf exwm-xim--server-client-plist server-xwin)
|
||
(cl-remf exwm-xim--client-server-plist client-xwin)
|
||
;; Destroy the communication window & connection.
|
||
(xcb:+request conn
|
||
(make-instance 'xcb:DestroyWindow
|
||
:window server-xwin))
|
||
(xcb:disconnect conn)))))
|
||
|
||
(cl-defun exwm-xim--init ()
|
||
"Initialize the XIM module."
|
||
(exwm--log)
|
||
(when exwm-xim--conn
|
||
(cl-return-from exwm-xim--init))
|
||
;; Initialize atoms.
|
||
(setq exwm-xim--@server (exwm--intern-atom "@server=exwm-xim")
|
||
exwm-xim--LOCALES (exwm--intern-atom "LOCALES")
|
||
exwm-xim--TRANSPORT (exwm--intern-atom "TRANSPORT")
|
||
exwm-xim--XIM_SERVERS (exwm--intern-atom "XIM_SERVERS")
|
||
exwm-xim--_XIM_PROTOCOL (exwm--intern-atom "_XIM_PROTOCOL")
|
||
exwm-xim--_XIM_XCONNECT (exwm--intern-atom "_XIM_XCONNECT"))
|
||
;; Create a new connection and event window.
|
||
(setq exwm-xim--conn (xcb:connect)
|
||
exwm-xim--event-xwin (xcb:generate-id exwm-xim--conn))
|
||
(set-process-query-on-exit-flag (slot-value exwm-xim--conn 'process) nil)
|
||
;; Initialize xcb:keysyms module.
|
||
(xcb:keysyms:init exwm-xim--conn)
|
||
;; Listen to SelectionRequest event for connection establishment.
|
||
(xcb:+event exwm-xim--conn 'xcb:SelectionRequest
|
||
#'exwm-xim--on-SelectionRequest)
|
||
;; Listen to ClientMessage event on IMS window for new XIM connection.
|
||
(xcb:+event exwm-xim--conn 'xcb:ClientMessage #'exwm-xim--on-ClientMessage-0)
|
||
;; Listen to DestroyNotify event to do cleanups.
|
||
(xcb:+event exwm-xim--conn 'xcb:DestroyNotify #'exwm-xim--on-DestroyNotify)
|
||
;; Create the event window.
|
||
(xcb:+request exwm-xim--conn
|
||
(make-instance 'xcb:CreateWindow
|
||
:depth 0
|
||
:wid exwm-xim--event-xwin
|
||
:parent exwm--root
|
||
:x 0
|
||
:y 0
|
||
:width 1
|
||
:height 1
|
||
:border-width 0
|
||
:class xcb:WindowClass:InputOutput
|
||
:visual 0
|
||
:value-mask xcb:CW:OverrideRedirect
|
||
:override-redirect 1))
|
||
;; Set the selection owner.
|
||
(xcb:+request exwm-xim--conn
|
||
(make-instance 'xcb:SetSelectionOwner
|
||
:owner exwm-xim--event-xwin
|
||
:selection exwm-xim--@server
|
||
:time xcb:Time:CurrentTime))
|
||
;; Set XIM_SERVERS property on the root window.
|
||
(xcb:+request exwm-xim--conn
|
||
(make-instance 'xcb:ChangeProperty
|
||
:mode xcb:PropMode:Prepend
|
||
:window exwm--root
|
||
:property exwm-xim--XIM_SERVERS
|
||
:type xcb:Atom:ATOM
|
||
:format 32
|
||
:data-len 1
|
||
:data (funcall (if xcb:lsb
|
||
#'xcb:-pack-u4-lsb
|
||
#'xcb:-pack-u4)
|
||
exwm-xim--@server)))
|
||
(xcb:flush exwm-xim--conn))
|
||
|
||
(cl-defun exwm-xim--exit ()
|
||
"Exit the XIM module."
|
||
(exwm--log)
|
||
;; Close IMS communication connections.
|
||
(mapc (lambda (i)
|
||
(when (vectorp i)
|
||
(xcb:disconnect (elt i 0))))
|
||
exwm-xim--server-client-plist)
|
||
;; Close the IMS connection.
|
||
(unless exwm-xim--conn
|
||
(cl-return-from exwm-xim--exit))
|
||
;; Remove exwm-xim from XIM_SERVERS.
|
||
(let ((reply (xcb:+request-unchecked+reply exwm-xim--conn
|
||
(make-instance 'xcb:GetProperty
|
||
:delete 1
|
||
:window exwm--root
|
||
:property exwm-xim--XIM_SERVERS
|
||
:type xcb:Atom:ATOM
|
||
:long-offset 0
|
||
:long-length 1000)))
|
||
unpacked-reply pack unpack)
|
||
(unless reply
|
||
(cl-return-from exwm-xim--exit))
|
||
(setq reply (slot-value reply 'value))
|
||
(unless (> (length reply) 4)
|
||
(cl-return-from exwm-xim--exit))
|
||
(setq reply (vconcat reply)
|
||
pack (if xcb:lsb #'xcb:-pack-u4-lsb #'xcb:-pack-u4)
|
||
unpack (if xcb:lsb #'xcb:-unpack-u4-lsb #'xcb:-unpack-u4))
|
||
(dotimes (i (/ (length reply) 4))
|
||
(push (funcall unpack reply (* i 4)) unpacked-reply))
|
||
(setq unpacked-reply (delq exwm-xim--@server unpacked-reply)
|
||
reply (mapcar pack unpacked-reply))
|
||
(xcb:+request exwm-xim--conn
|
||
(make-instance 'xcb:ChangeProperty
|
||
:mode xcb:PropMode:Replace
|
||
:window exwm--root
|
||
:property exwm-xim--XIM_SERVERS
|
||
:type xcb:Atom:ATOM
|
||
:format 32
|
||
:data-len (length reply)
|
||
:data reply))
|
||
(xcb:flush exwm-xim--conn))
|
||
(xcb:disconnect exwm-xim--conn)
|
||
(setq exwm-xim--conn nil))
|
||
|
||
(defun exwm-xim-enable ()
|
||
"Enable XIM support for EXWM."
|
||
(exwm--log)
|
||
(add-hook 'exwm-init-hook #'exwm-xim--init)
|
||
(add-hook 'exwm-exit-hook #'exwm-xim--exit))
|
||
|
||
|
||
|
||
(provide 'exwm-xim)
|
||
|
||
;;; exwm-xim.el ends here
|