mirror of
https://github.com/emacs-exwm/exwm.git
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450 lines
19 KiB
EmacsLisp
450 lines
19 KiB
EmacsLisp
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;;; 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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(exwm--with-current-id 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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(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 exwm-input--timestamp)
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exwm--connection)))
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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 (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 (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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(redirect-frame-focus exwm--floating-frame nil)
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;; Focus the floating frame
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(x-focus-frame exwm--floating-frame)))
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;; Finally focus the window
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(exwm-input--set-focus exwm-input--focus-id))
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(exwm--with-current-id exwm-input--focus-id
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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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(redirect-frame-focus exwm--floating-frame frame))
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;; Focus the workspace 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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(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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(exwm--with-current-id event
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(raise-frame (or exwm--floating-frame 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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(funcall 'exwm-input--handle-KeyPress 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--handle-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--handle-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--handle-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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(setq exwm-input--temp-line-mode t
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exwm-input--during-key-sequence t)
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(push event unread-command-events)
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(exwm-input--grab-keyboard))))) ;grab keyboard temporarily
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(defalias 'exwm-input--handle-KeyPress 'exwm-input--handle-KeyPress-line-mode
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"Generic function for handling KeyPress event.")
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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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(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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(defalias 'exwm-input--handle-KeyPress
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'exwm-input--handle-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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(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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(defalias 'exwm-input--handle-KeyPress
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'exwm-input--handle-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"
|
|||
|
|
help-echo "mouse-1: Switch to char-mode"
|
|||
|
|
mouse-face mode-line-highlight
|
|||
|
|
local-map
|
|||
|
|
(keymap
|
|||
|
|
(mode-line
|
|||
|
|
keymap
|
|||
|
|
(down-mouse-1 . exwm-input-release-keyboard))))))
|
|||
|
|
(force-mode-line-update))
|
|||
|
|
|
|||
|
|
(defun exwm-input-release-keyboard (&optional id)
|
|||
|
|
"Switch to char-mode."
|
|||
|
|
(interactive)
|
|||
|
|
(exwm-input--release-keyboard id)
|
|||
|
|
(setq mode-line-process
|
|||
|
|
'(": "
|
|||
|
|
(:propertize "char"
|
|||
|
|
help-echo "mouse-1: Switch to line-mode"
|
|||
|
|
mouse-face mode-line-highlight
|
|||
|
|
local-map
|
|||
|
|
(keymap
|
|||
|
|
(mode-line
|
|||
|
|
keymap
|
|||
|
|
(down-mouse-1 . exwm-input-grab-keyboard))))))
|
|||
|
|
(force-mode-line-update))
|
|||
|
|
|
|||
|
|
(defun exwm-input--fake-key (event)
|
|||
|
|
"Fake a key event equivalent to Emacs event EVENT."
|
|||
|
|
(let* ((keysym (xcb:keysyms:event->keysym event))
|
|||
|
|
(keycode (xcb:keysyms:keysym->keycode exwm--connection (car keysym)))
|
|||
|
|
(id (exwm--buffer->id (window-buffer (selected-window)))))
|
|||
|
|
(when keycode
|
|||
|
|
(xcb:+request exwm--connection
|
|||
|
|
(make-instance 'xcb:SendEvent
|
|||
|
|
:propagate 0 :destination id
|
|||
|
|
:event-mask xcb:EventMask:NoEvent
|
|||
|
|
:event (xcb:marshal
|
|||
|
|
(make-instance 'xcb:KeyPress
|
|||
|
|
:detail keycode
|
|||
|
|
:time xcb:Time:CurrentTime
|
|||
|
|
:root exwm--root :event id
|
|||
|
|
:child 0
|
|||
|
|
:root-x 0 :root-y 0
|
|||
|
|
:event-x 0 :event-y 0
|
|||
|
|
:state (cadr keysym)
|
|||
|
|
:same-screen 1)
|
|||
|
|
exwm--connection))))
|
|||
|
|
(xcb:flush exwm--connection)))
|
|||
|
|
|
|||
|
|
(defun exwm-input-send-next-key (times)
|
|||
|
|
"Send next key to client window."
|
|||
|
|
(interactive "p")
|
|||
|
|
(when (> times 12) (setq times 12))
|
|||
|
|
(let (key keys)
|
|||
|
|
(dotimes (i times)
|
|||
|
|
;; Skip events not from keyboard
|
|||
|
|
(setq exwm-input--during-key-sequence t)
|
|||
|
|
(catch 'break
|
|||
|
|
(while t
|
|||
|
|
(setq key (read-key (format "Send key: %s (%d/%d)"
|
|||
|
|
(key-description keys)
|
|||
|
|
(1+ i) times)))
|
|||
|
|
(unless (listp key) (throw 'break nil))))
|
|||
|
|
(setq exwm-input--during-key-sequence nil)
|
|||
|
|
(setq keys (vconcat keys (vector key)))
|
|||
|
|
(exwm-input--fake-key key))))
|
|||
|
|
|
|||
|
|
;; (defun exwm-input-send-last-key ()
|
|||
|
|
;; (interactive)
|
|||
|
|
;; (unless (listp last-input-event) ;not a key event
|
|||
|
|
;; (exwm-input--fake-key last-input-event)))
|
|||
|
|
|
|||
|
|
(defvar exwm-input-prefix-keys
|
|||
|
|
'(?\C-x ?\C-u ?\C-h ?\M-x ?\M-` ?\M-\S-! ?\M-\S-& ?\M-\S-:)
|
|||
|
|
"List of prefix keys EXWM should forward to Emacs when in line-mode.")
|
|||
|
|
|
|||
|
|
(defvar exwm-input--simulation-keys nil "Simulation keys in line-mode.")
|
|||
|
|
(defvar exwm-input--simulation-prefix-keys nil
|
|||
|
|
"List of prefix keys of simulation keys in line-mode.")
|
|||
|
|
|
|||
|
|
(defun exwm-input--update-simulation-prefix-keys ()
|
|||
|
|
"Update the list of prefix keys of simulation keys."
|
|||
|
|
(setq exwm-input--simulation-prefix-keys nil)
|
|||
|
|
(dolist (i exwm-input--simulation-keys)
|
|||
|
|
(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 ()
|
|||
|
|
"Fake a key event according to last input key sequence."
|
|||
|
|
(interactive)
|
|||
|
|
(let ((pair (assoc (this-command-keys-vector) ;FIXME: pefix
|
|||
|
|
exwm-input--simulation-keys))
|
|||
|
|
key)
|
|||
|
|
(when pair
|
|||
|
|
(setq pair (cdr pair))
|
|||
|
|
(unless (listp pair)
|
|||
|
|
(setq pair (list pair)))
|
|||
|
|
(dolist (i pair)
|
|||
|
|
(exwm-input--fake-key i)))))
|
|||
|
|
|
|||
|
|
(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
|