mirror of
https://github.com/emacs-exwm/exwm.git
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04e4269617
This commit should fix most input focus bugs (especially those related to floating windows). The actual settings of input focus are delayed to exclude redundant event. Dead code since this commit is removed. This commit also fixes a bug for non-floating windows converted form floating state. The workaround for `ido-mode` is also improved to properly handle `exwm-mode` buffers.
478 lines
21 KiB
EmacsLisp
478 lines
21 KiB
EmacsLisp
;;; exwm-input.el --- Input Module for EXWM -*- lexical-binding: t -*-
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;; Copyright (C) 2015 Chris Feng
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;; Author: Chris Feng <chris.w.feng@gmail.com>
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;; Keywords: unix
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;; This file is not part of GNU Emacs.
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;; This file 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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;; This file 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 this file. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module deals with key/mouse matters, including:
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;; + Input focus,
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;; + Key/Button event handling,
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;; + Key events filtering and simulation.
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;; Todo:
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;; + Pointer simulation mode (e.g. 'C-c 1'/'C-c 2' for single/double click,
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;; move with arrow keys).
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;; + Simulation keys to mimic Emacs key bindings for text edit (redo, select,
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;; cancel, clear, etc). Some of them are not present on common keyboard
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;; (keycode = 0). May need to use XKB extension.
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;;; Code:
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(require 'xcb-keysyms)
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(require 'exwm-floating)
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(defvar exwm-input-move-event 's-down-mouse-1
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"Emacs event to start moving a window.")
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(defvar exwm-input-resize-event 's-down-mouse-3
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"Emacs event to start resizing a window.")
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(defvar exwm-input--move-keysym nil)
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(defvar exwm-input--move-mask nil)
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(defvar exwm-input--resize-keysym nil)
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(defvar exwm-input--resize-mask nil)
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(defvar exwm-input--timestamp xcb:Time:CurrentTime
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"A recent timestamp received from X server.
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It's updated in several occasions, and only used by `exwm-input--set-focus'.")
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(defun exwm-input--set-focus (id)
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"Set input focus to window ID in a proper way."
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(with-current-buffer (exwm--id->buffer id)
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(if (and (not exwm--hints-input)
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(memq xcb:Atom:WM_TAKE_FOCUS exwm--protocols))
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(progn
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(exwm--log "Focus on #x%x with WM_TAKE_FOCUS" id)
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(xcb:+request exwm--connection
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(make-instance 'xcb:icccm:SendEvent
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:destination id
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:event (xcb:marshal
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(make-instance 'xcb:icccm:WM_TAKE_FOCUS
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:window id
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:time
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exwm-input--timestamp)
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exwm--connection))))
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(exwm--log "Focus on #x%x with SetInputFocus" id)
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(xcb:+request exwm--connection
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(make-instance 'xcb:SetInputFocus
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:revert-to xcb:InputFocus:Parent :focus id
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:time xcb:Time:CurrentTime)))
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(xcb:flush exwm--connection)))
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(defvar exwm-input--focus-buffer nil "The buffer to be focused.")
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(defvar exwm-input--redirected nil
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"Indicate next update on buffer list is actually a result of redirection.")
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(defvar exwm-input--timer nil "Currently running timer.")
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(defun exwm-input--on-buffer-list-update ()
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"Run in buffer-list-update-hook to track input focus."
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(let ((frame (selected-frame))
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(buffer (current-buffer)))
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(when (and (not (minibufferp buffer))
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(frame-parameter frame 'exwm-window-id) ;e.g. emacsclient frame
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(eq buffer (window-buffer))) ;e.g. `with-temp-buffer'
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(unless (and exwm-input--redirected
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exwm-input--focus-buffer
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(with-current-buffer exwm-input--focus-buffer
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exwm--floating-frame))
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(setq exwm-input--focus-buffer buffer)
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(when exwm-input--timer (cancel-timer exwm-input--timer))
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(setq exwm-input--timer
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(run-with-timer 0.01 nil 'exwm-input--update-focus)))
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(setq exwm-input--redirected nil))))
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(defun exwm-input--on-focus-in ()
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"Run in focus-in-hook to remove redirected focus on frame."
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(let ((frame (selected-frame)))
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(when (and (frame-parameter frame 'exwm-window-id)
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(not (memq frame exwm-workspace--list)))
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(setq exwm-input--redirected t))))
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(defun exwm-input--update-focus ()
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"Update input focus."
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(when exwm-input--focus-buffer
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(with-current-buffer exwm-input--focus-buffer
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(exwm--log "Set focus on %s" exwm-input--focus-buffer)
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(setq exwm-input--focus-buffer nil)
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(if (eq major-mode 'exwm-mode)
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(progn
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(when exwm--floating-frame
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(redirect-frame-focus exwm--floating-frame nil)
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(select-frame-set-input-focus exwm--floating-frame t))
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(exwm-input--set-focus exwm--id))
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(select-frame-set-input-focus exwm-workspace--current t)
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(dolist (pair exwm--id-buffer-alist)
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(with-current-buffer (cdr pair)
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(when (and exwm--floating-frame
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(eq exwm--frame exwm-workspace--current))
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(redirect-frame-focus exwm--floating-frame exwm--frame))))))))
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(defun exwm-input--finish-key-sequence ()
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"Mark the end of a key sequence (with the aid of `pre-command-hook')."
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(when (and exwm-input--during-key-sequence
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(not (equal [?\C-u] (this-single-command-keys))))
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(setq exwm-input--during-key-sequence nil)
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(when exwm-input--temp-line-mode
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(setq exwm-input--temp-line-mode nil)
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(exwm-input--release-keyboard))))
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(defun exwm-input--on-MappingNotify (data synthetic)
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"Handle MappingNotify event."
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(let ((obj (make-instance 'xcb:MappingNotify)))
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(xcb:unmarshal obj data)
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(with-slots (request first-keycode count) obj
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(cond
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((= request xcb:Mapping:Modifier)
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;; Modifier keys changed
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(exwm--log "Update modifier mapping")
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(xcb:keysyms:update-modifier-mapping exwm--connection)
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)
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((= request xcb:Mapping:Keyboard)
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;; Only update changed keys
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(with-slots (min-keycode max-keycode)
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(xcb:get-setup exwm--connection)
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;; Since this operation is quite time-consuming, a complete refresh
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;; is forbidden as it's unlikely to bring any useful information
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(unless (and (= min-keycode first-keycode)
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(= max-keycode (+ first-keycode count -1)))
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(exwm--log "Update keyboard mapping: %d ~ %d"
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first-keycode (+ first-keycode count))
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(xcb:keysyms:update-keyboard-mapping exwm--connection
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first-keycode count))))))))
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(defun exwm-input--on-ButtonPress (data synthetic)
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"Handle ButtonPress event."
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(let ((obj (make-instance 'xcb:ButtonPress))
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(mode xcb:Allow:SyncPointer))
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(xcb:unmarshal obj data)
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(with-slots (detail time event state) obj
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(setq exwm-input--timestamp time)
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(cond ((and (= state exwm-input--move-mask)
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(= detail exwm-input--move-keysym))
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;; Move
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(exwm-floating--start-moveresize event
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xcb:ewmh:_NET_WM_MOVERESIZE_MOVE))
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((and (= state exwm-input--resize-mask)
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(= detail exwm-input--resize-keysym))
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;; Resize
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(exwm-floating--start-moveresize event))
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(t
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(select-window (get-buffer-window (exwm--id->buffer event)
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'visible))
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;; The event should be replayed
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(setq mode xcb:Allow:ReplayPointer))))
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(xcb:+request exwm--connection
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(make-instance 'xcb:AllowEvents :mode mode :time xcb:Time:CurrentTime))
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(xcb:flush exwm--connection)))
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(defun exwm-input--on-KeyPress (data synthetic)
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"Handle KeyPress event."
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(let ((obj (make-instance 'xcb:KeyPress)))
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(xcb:unmarshal obj data)
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(setq exwm-input--timestamp (slot-value obj 'time))
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(if (eq major-mode 'exwm-mode)
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(funcall exwm--on-KeyPress obj)
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(exwm-input--on-KeyPress-char-mode obj))))
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(defvar exwm-input--global-keys nil "Global key bindings.")
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(defvar exwm-input--global-prefix-keys nil
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"List of prefix keys of global key bindings.")
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(defun exwm-input--update-global-prefix-keys ()
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"Update `exwm-input--global-prefix-keys'."
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(when exwm--connection
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(let ((original exwm-input--global-prefix-keys)
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keysym)
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(setq exwm-input--global-prefix-keys nil)
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(dolist (i exwm-input--global-keys)
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(cl-pushnew (elt i 0) exwm-input--global-prefix-keys))
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(unless (equal original exwm-input--global-prefix-keys)
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;; Grab global keys on root window
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(if (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:UngrabKey
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:key xcb:Grab:Any :grab-window exwm--root
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:modifiers xcb:ModMask:Any))
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(exwm--log "Failed to ungrab keys")
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(dolist (i exwm-input--global-prefix-keys)
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(setq keysym (xcb:keysyms:event->keysym i))
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(when (or (not keysym)
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(xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:GrabKey
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:owner-events 0
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:grab-window exwm--root
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:modifiers (cadr keysym)
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:key (xcb:keysyms:keysym->keycode
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exwm--connection (car keysym))
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:pointer-mode xcb:GrabMode:Async
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:keyboard-mode xcb:GrabMode:Async)))
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(user-error "[EXWM] Failed to grab key: %s" i))))))))
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(defun exwm-input-set-key (key command)
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"Set a global key binding."
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(global-set-key key command)
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(cl-pushnew key exwm-input--global-keys))
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(defvar exwm-input--during-key-sequence nil
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"Non-nil indicates Emacs is waiting for more keys to form a key sequence.")
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(defvar exwm-input--temp-line-mode nil
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"Non-nil indicates it's in temporary line-mode for char-mode.")
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;; ;; This implementation has a problem that it also releases queued keys after
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;; ;; requesting AllowEvent. The client window will capture unexpected key events
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;; ;; in this case.
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;; ;; P.S.; to use this implementation, comment out the KeyRelease listener
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;; ;; together with this one and make GrabKey in Sync mode.
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;; (cl-defmethod exwm-input--on-KeyPress-line-mode ((obj xcb:KeyPress))
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;; "Parse X KeyPress event to Emacs key event and then feed the command loop."
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;; (with-slots (detail state) obj
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;; (let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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;; event window mode)
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;; (when (and keysym
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;; (setq event (xcb:keysyms:keysym->event keysym state))
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;; (or exwm-input--during-key-sequence
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;; (setq window (active-minibuffer-window))
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;; (eq event ?\C-c) ;mode-specific key
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;; (memq event exwm-input--global-prefix-keys)
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;; (memq event exwm-input-prefix-keys)
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;; (memq event
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;; exwm-input--simulation-prefix-keys)))
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;; (setq mode xcb:Allow:SyncKeyboard)
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;; (unless window (setq exwm-input--during-key-sequence t))
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;; (push event unread-command-events))
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;; (xcb:+request exwm--connection
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;; (make-instance 'xcb:AllowEvents
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;; :mode (or mode xcb:Allow:ReplayKeyboard)
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;; :time xcb:Time:CurrentTime))
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;; (xcb:flush exwm--connection))))
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;; This implementation has a drawback that some (legacy) applications
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;; (e.g. xterm) ignore the synthetic key events, making it only viable for EXWM
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;; to work in char-mode in such case.
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(cl-defmethod exwm-input--on-KeyPress-line-mode ((obj xcb:KeyPress))
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"Parse X KeyPress event to Emacs key event and then feed the command loop."
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(with-slots (detail state) obj
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(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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event minibuffer-window)
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(if (and keysym
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(setq event (xcb:keysyms:keysym->event keysym state))
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(or exwm-input--during-key-sequence
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(setq minibuffer-window (active-minibuffer-window))
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(eq event ?\C-c) ;mode-specific key
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(memq event exwm-input--global-prefix-keys)
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(memq event exwm-input-prefix-keys)
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(memq event exwm-input--simulation-prefix-keys)))
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;; Forward key to Emacs frame
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(progn (unless minibuffer-window
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(setq exwm-input--during-key-sequence t))
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(push event unread-command-events))
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;; Forward key to window
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(xcb:+request exwm--connection
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(make-instance 'xcb:SendEvent
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:propagate 0 :destination (slot-value obj 'event)
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal obj exwm--connection)))
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(xcb:flush exwm--connection)))))
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(cl-defmethod exwm-input--on-KeyPress-char-mode ((obj xcb:KeyPress))
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"Handle KeyPress event in char-mode."
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(with-slots (detail state) obj
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(let ((keysym (xcb:keysyms:keycode->keysym exwm--connection detail state))
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event)
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(when (and keysym (setq event (xcb:keysyms:keysym->event keysym state)))
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(when (eq major-mode 'exwm-mode)
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(setq exwm-input--temp-line-mode t
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exwm-input--during-key-sequence t)
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(exwm-input--grab-keyboard)) ;grab keyboard temporarily
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(push event unread-command-events)))))
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(defun exwm-input--grab-keyboard (&optional id)
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"Grab all key events on window ID."
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(unless id (setq id (exwm--buffer->id (window-buffer))))
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(cl-assert id)
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(when (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:GrabKey
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:owner-events 0 :grab-window id
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:modifiers xcb:ModMask:Any
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:key xcb:Grab:Any
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:pointer-mode xcb:GrabMode:Async
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:keyboard-mode xcb:GrabMode:Async))
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(exwm--log "Failed to grab keyboard for #x%x" id))
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(setq exwm--on-KeyPress 'exwm-input--on-KeyPress-line-mode))
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(defun exwm-input--release-keyboard (&optional id)
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"Ungrab all key events on window ID."
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(unless id (setq id (exwm--buffer->id (window-buffer))))
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(cl-assert id)
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(when (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:UngrabKey
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:key xcb:Grab:Any :grab-window id
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:modifiers xcb:ModMask:Any))
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(exwm--log "Failed to release keyboard for #x%x" id))
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(setq exwm--on-KeyPress 'exwm-input--on-KeyPress-char-mode))
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(defun exwm-input-grab-keyboard (&optional id)
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"Switch to line-mode."
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(interactive)
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(exwm-input--grab-keyboard id)
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(setq mode-line-process
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'(": "
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(:propertize "line"
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help-echo "mouse-1: Switch to char-mode"
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mouse-face mode-line-highlight
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local-map
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(keymap
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(mode-line
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keymap
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(down-mouse-1 . exwm-input-release-keyboard))))))
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(force-mode-line-update))
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(defun exwm-input-release-keyboard (&optional id)
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"Switch to char-mode."
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(interactive)
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(exwm-input--release-keyboard id)
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(setq mode-line-process
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'(": "
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(:propertize "char"
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help-echo "mouse-1: Switch to line-mode"
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mouse-face mode-line-highlight
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local-map
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(keymap
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(mode-line
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keymap
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(down-mouse-1 . exwm-input-grab-keyboard))))))
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(force-mode-line-update))
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(defun exwm-input--fake-key (event)
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"Fake a key event equivalent to Emacs event EVENT."
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(let* ((keysym (xcb:keysyms:event->keysym event))
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(keycode (xcb:keysyms:keysym->keycode exwm--connection (car keysym)))
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(id (exwm--buffer->id (window-buffer (selected-window)))))
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(when keycode
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(xcb:+request exwm--connection
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(make-instance 'xcb:SendEvent
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:propagate 0 :destination id
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal
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(make-instance 'xcb:KeyPress
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:detail keycode
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:time xcb:Time:CurrentTime
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:root exwm--root :event id
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:child 0
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:root-x 0 :root-y 0
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:event-x 0 :event-y 0
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:state (cadr keysym)
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:same-screen 1)
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exwm--connection))))
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(xcb:flush exwm--connection)))
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(defun exwm-input-send-next-key (times)
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"Send next key to client window."
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(interactive "p")
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(when (> times 12) (setq times 12))
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(let (key keys)
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(dotimes (i times)
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;; Skip events not from keyboard
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(setq exwm-input--during-key-sequence t)
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(catch 'break
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(while t
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(setq key (read-key (format "Send key: %s (%d/%d)"
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(key-description keys)
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(1+ i) times)))
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(unless (listp key) (throw 'break nil))))
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(setq exwm-input--during-key-sequence nil)
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(setq keys (vconcat keys (vector key)))
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(exwm-input--fake-key key))))
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;; (defun exwm-input-send-last-key ()
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;; (interactive)
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;; (unless (listp last-input-event) ;not a key event
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;; (exwm-input--fake-key last-input-event)))
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(defvar exwm-input-prefix-keys
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'(?\C-x ?\C-u ?\C-h ?\M-x ?\M-` ?\M-! ?\M-& ?\M-:)
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"List of prefix keys EXWM should forward to Emacs when in line-mode.")
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(defvar exwm-input--simulation-keys nil "Simulation keys in line-mode.")
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(defvar exwm-input--simulation-prefix-keys nil
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"List of prefix keys of simulation keys in line-mode.")
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(defun exwm-input--update-simulation-prefix-keys ()
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"Update the list of prefix keys of simulation keys."
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(setq exwm-input--simulation-prefix-keys nil)
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(dolist (i exwm-input--simulation-keys)
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(define-key exwm-mode-map (car i) 'exwm-input-send-simulation-key)
|
||
(cl-pushnew (elt (car i) 0) exwm-input--simulation-prefix-keys)))
|
||
|
||
(defun exwm-input-set-simulation-keys (simulation-keys)
|
||
"Set simulation keys.
|
||
|
||
SIMULATION-KEYS is a list of alist (key-sequence1 . key-sequence2)."
|
||
(setq exwm-input--simulation-keys nil)
|
||
(dolist (i simulation-keys)
|
||
(cl-pushnew `(,(vconcat (car i)) . ,(cdr i)) exwm-input--simulation-keys))
|
||
(exwm-input--update-simulation-prefix-keys))
|
||
|
||
(defun exwm-input-send-simulation-key (times)
|
||
"Fake a key event according to last input key sequence."
|
||
(interactive "p")
|
||
(let ((pair (assoc (this-single-command-keys)
|
||
exwm-input--simulation-keys))
|
||
key)
|
||
(when pair
|
||
(setq pair (cdr pair))
|
||
(unless (listp pair)
|
||
(setq pair (list pair)))
|
||
(dotimes (i times)
|
||
(dolist (j pair)
|
||
(exwm-input--fake-key j))))))
|
||
|
||
(defun exwm-input--init ()
|
||
"Initialize the keyboard module."
|
||
;; Refresh keyboard mapping
|
||
(xcb:keysyms:init exwm--connection)
|
||
;; Convert move/resize buttons
|
||
(let ((move-key (xcb:keysyms:event->keysym exwm-input-move-event))
|
||
(resize-key (xcb:keysyms:event->keysym exwm-input-resize-event)))
|
||
(setq exwm-input--move-keysym (car move-key)
|
||
exwm-input--move-mask (cadr move-key)
|
||
exwm-input--resize-keysym (car resize-key)
|
||
exwm-input--resize-mask (cadr resize-key)))
|
||
;; Attach event listeners
|
||
(xcb:+event exwm--connection 'xcb:MappingNotify
|
||
'exwm-input--on-MappingNotify)
|
||
(xcb:+event exwm--connection 'xcb:KeyPress 'exwm-input--on-KeyPress)
|
||
(xcb:+event exwm--connection 'xcb:ButtonPress 'exwm-input--on-ButtonPress)
|
||
(xcb:+event exwm--connection 'xcb:ButtonRelease
|
||
'exwm-floating--stop-moveresize)
|
||
(xcb:+event exwm--connection 'xcb:MotionNotify 'exwm-floating--do-moveresize)
|
||
;; `pre-command-hook' marks the end of a key sequence (existing or not)
|
||
(add-hook 'pre-command-hook 'exwm-input--finish-key-sequence)
|
||
;; Update focus when buffer list updates
|
||
(add-hook 'buffer-list-update-hook 'exwm-input--on-buffer-list-update)
|
||
(add-hook 'focus-in-hook 'exwm-input--on-focus-in)
|
||
;; Update prefix keys for global keys
|
||
(exwm-input--update-global-prefix-keys))
|
||
|
||
|
||
|
||
(provide 'exwm-input)
|
||
|
||
;;; exwm-input.el ends here
|