mirror of
https://github.com/emacs-exwm/exwm.git
synced 2024-11-23 21:17:59 +01:00
048994c794
Remove `exwm--with-current-id`, which was introduced to as a wrapper to `with-current-buffer` to do extra checks. Note that in functions run as hooks, the validation of window ID is still required as they are not synchronized with events.
472 lines
21 KiB
EmacsLisp
472 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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(exwm--log "Set focus ID to #x%x" id)
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(setq exwm-input--focus-id 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-id xcb:Window:None
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"The window that is theoretically focused.")
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(defvar exwm-input--focus-lock nil
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"Non-nil when input focus should stay unchanged.")
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(defun exwm-input--update-focus ()
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"Update input focus."
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(unless exwm-input--focus-lock
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(setq exwm-input--focus-lock t)
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(when (and (frame-parameter nil 'exwm-window-id) ;e.g. emacsclient frame
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(eq (current-buffer) (window-buffer))) ;e.g. `with-temp-buffer'
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(if (eq major-mode 'exwm-mode)
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(progn (exwm--log "Set focus ID to #x%x" exwm--id)
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(setq exwm-input--focus-id exwm--id)
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(when exwm--floating-frame
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(if (eq (selected-frame) exwm--floating-frame)
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;; Cancel the possible input focus redirection
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(progn
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(exwm--log "Cancel input focus redirection on %s"
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exwm--floating-frame)
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(redirect-frame-focus exwm--floating-frame nil))
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;; Focus the floating frame
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(exwm--log "Focus on floating frame %s"
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exwm--floating-frame)
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(x-focus-frame exwm--floating-frame)))
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;; Finally focus the window
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(when (exwm--id->buffer exwm-input--focus-id)
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(exwm-input--set-focus exwm-input--focus-id)))
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(let ((buffer (exwm--id->buffer exwm-input--focus-id)))
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(when buffer
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(with-current-buffer buffer
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(exwm--log "Set focus ID to #x%x" xcb:Window:None)
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(setq exwm-input--focus-id xcb:Window:None)
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(let ((frame (selected-frame)))
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(if exwm--floating-frame
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(unless (or (eq frame exwm--floating-frame)
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(active-minibuffer-window))
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;; Redirect input focus to the workspace frame
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(exwm--log "Redirect input focus (%s => %s)"
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exwm--floating-frame frame)
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(redirect-frame-focus exwm--floating-frame frame))
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;; Focus the workspace frame
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(exwm--log "Focus on workspace %s" frame)
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(x-focus-frame frame))))))))
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(setq exwm-input--focus-lock nil)))
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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 ((= request xcb:Mapping:Modifier)
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;; Modifier keys changed
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(xcb:keysyms:update-modifier-mapping exwm--connection))
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((= request xcb:Mapping:Keyboard)
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;; Only updated changed keys
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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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;; Click to focus
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(unless (and (boundp 'exwm--id) (= event exwm--id))
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(with-current-buffer (exwm--id->buffer event)
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(select-frame-set-input-focus (or exwm--floating-frame
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exwm--frame))
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(select-window (get-buffer-window nil '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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;; (= exwm-input--focus-id xcb:Window:None)
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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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(= exwm-input--focus-id xcb:Window:None)
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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)
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(cl-pushnew (elt (car i) 0) exwm-input--simulation-prefix-keys)))
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(defun exwm-input-set-simulation-keys (simulation-keys)
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"Set simulation keys.
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SIMULATION-KEYS is a list of alist (key-sequence1 . key-sequence2)."
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||
(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--update-focus)
|
||
;; Update prefix keys for global keys
|
||
(exwm-input--update-global-prefix-keys))
|
||
|
||
|
||
|
||
(provide 'exwm-input)
|
||
|
||
;;; exwm-input.el ends here
|