487 lines
19 KiB
EmacsLisp
487 lines
19 KiB
EmacsLisp
;;; core-spacebind.el --- Spacemacs Core File -*- lexical-binding: t -*-
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;;
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;; Copyright (c) 2012-2021 Sylvain Benner & Contributors
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;;
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;; Author: Eugene "JAremko" Yaremenko <w3techplayground@gmail.com>
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;; URL: https://github.com/syl20bnr/spacemacs
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;;
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;; This file is not part of GNU Emacs.
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;;
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;; This program 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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;;
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;; This program 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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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(require 'core-keybindings)
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(defvar spacebind--eager-bind t
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"If true bind keys right after `spacmeacs|spacebind' macro-expanse.
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Otherwise binding happens at the next event loop.")
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;;;; Binding stacks
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(defvar spacebind--bs-minor-mode-replacements '()
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"Binding stack for `spacemacs/add-key-based-replacements-for-minor-mode'.")
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(defvar spacebind--bs-major-mode-replacements '()
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"Binding stack for `which-key-add-major-mode-key-based-replacements'.")
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(defvar spacebind--bs-declare-prefix '()
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"Binding stack for `spacemacs/declare-prefix'.")
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(defvar spacebind--bs-declare-prefix-for-mode '()
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"Binding stack for `spacemacs/declare-prefix-for-mode'.")
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(defvar spacebind--bs-leader-keys '()
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"Binding stack for `spacemacs/set-leader-keys'.")
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(defvar spacebind--bs-leader-keys-for-major-mode '()
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"Binding stack for `spacemacs/set-leader-keys-for-major-mode'.")
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(defvar spacebind--bs-leader-keys-for-minor-mode '()
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"Binding stack for `spacemacs/set-leader-keys-for-minor-mode'.")
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(defvar spacebind--bs-global-replacements '()
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"Binding stack for `which-key-add-key-based-replacements'.")
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(defvar spacebind--bs-fn-key-seq-override '()
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"Binding stack for `spacemacs/add-which-key-fn-key-seq-override'.")
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(defvar spacebind--timer [t]
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"`run-with-idle-timer' return value for `spacebind//process-bind-stack'.")
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(defun spacebind//process-bind-stack ()
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"Binds keys and prefixes popping the binding stacks."
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(unwind-protect
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(progn
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;; `spacemacs/add-key-based-replacements-for-minor-mode'
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(dolist (args spacebind--bs-minor-mode-replacements)
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(let ((mode (car args))
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(keys (string-join (append `(,(spacemacs/leader-key))
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(cadr args))
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" "))
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(label (caddr args)))
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(spacemacs/add-key-based-replacements-for-minor-mode
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mode keys label)))
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;; `which-key-add-major-mode-key-based-replacements'
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(dolist (args spacebind--bs-major-mode-replacements)
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(let ((mode (car args))
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(keys (string-join (append `(,(spacemacs/leader-key))
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`(,(spacemacs/major-mode-prefix))
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(cadr args))
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" "))
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(label (caddr args)))
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(which-key-add-major-mode-key-based-replacements mode keys label)))
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;; `spacemacs/declare-prefix'
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(dolist (args spacebind--bs-declare-prefix)
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(let ((prefix (string-join (car args) " "))
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(label (cadr args)))
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(spacemacs/declare-prefix prefix label)))
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;; `spacemacs/declare-prefix-for-mode'
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(dolist (args spacebind--bs-declare-prefix-for-mode)
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(let ((mode (car args))
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(prefix (string-join (cadr args) " "))
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(label (caddr args)))
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(spacemacs/declare-prefix-for-mode mode prefix label)))
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;; `spacemacs/set-leader-keys'
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(dolist (args spacebind--bs-leader-keys)
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(let ((keys (string-join (car args) " "))
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(fn-sym (cadr args)))
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(spacemacs/set-leader-keys keys fn-sym)))
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;; `spacemacs/set-leader-keys-for-major-mode'
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(dolist (args spacebind--bs-leader-keys-for-major-mode)
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(let ((mode (car args))
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(keys (string-join (cadr args) " "))
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(fn-sym (caddr args)))
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(spacemacs/set-leader-keys-for-major-mode mode keys fn-sym)))
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;; `spacemacs/set-leader-keys-for-minor-mode'
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(dolist (args spacebind--bs-leader-keys-for-minor-mode)
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(let ((mode (car args))
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(keys (string-join (cadr args) " "))
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(fn-sym (caddr args)))
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(spacemacs/set-leader-keys-for-minor-mode mode keys fn-sym)))
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;; `which-key-add-key-based-replacements'
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(dolist (args spacebind--bs-global-replacements)
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(let ((keys (string-join (append `(,(spacemacs/leader-key))
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(car args))
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" "))
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(label (cadr args)))
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(which-key-add-key-based-replacements keys label)))
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;; `spacemacs/add-which-key-fn-key-seq-override'
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(dolist (args spacebind--bs-fn-key-seq-override)
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(let ((sym (car args))
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(rep (cadr args))
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(label (caddr args)))
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(spacemacs/add-which-key-fn-key-seq-override sym rep label))))
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;; Reset stacks
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(setq spacebind--bs-global-replacements nil
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spacebind--bs-leader-keys-for-minor-mode nil
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spacebind--bs-leader-keys-for-major-mode nil
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spacebind--bs-leader-keys nil
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spacebind--bs-declare-prefix-for-mode nil
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spacebind--bs-declare-prefix nil
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spacebind--bs-major-mode-replacements nil
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spacebind--bs-minor-mode-replacements nil
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spacebind--bs-fn-key-seq-override nil
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;; Reset timer var
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spacebind--timer [t])))
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;; TODO: Make this configurable.
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(defun spacemacs/major-mode-prefix ()
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"Get current prefix for major modes.
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NOTE: `dotspacemacs-major-mode-leader-key' isn't the same."
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"m")
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(defun spacemacs/leader-key ()
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"Returns `dotspacemacs-leader-key'"
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dotspacemacs-leader-key)
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(defun spacebind//strip-docstring (mode-binding-form)
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"Remove second element of MODE-BINDING-FORM if it is a string."
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(if (stringp (cadr mode-binding-form))
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(cons (car mode-binding-form) (cddr mode-binding-form))
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mode-binding-form))
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(defun spacemacs/add-key-based-replacements-for-minor-mode
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(mode key-sequence replacement &rest more)
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"Proxy for `which-key-add-key-based-replacements'
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MODE currently ignored.
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FIXME: We should disable replacements when the mode is disabled.
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The function `which-key-add-major-mode-key-based-replacements' might give
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a clue how to do this.
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Also there is discussion about the feature:
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https://github.com/justbur/emacs-which-key/issues/212"
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(apply #'which-key-add-key-based-replacements key-sequence replacement more))
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(defun spacemacs/add-which-key-fn-key-seq-override
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(fn-name key-rep label)
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"Replace FN-NAME function's key sequence with KEY-REP and LABEL."
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(push `((nil . ,fn-name) . (,key-rep . ,label)) which-key-replacement-alist))
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(cl-defstruct spacemacs--spacebind-state
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"State object for `spacebind' macro implementation.
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CTYPE - current binding type.
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BSTACK - plist of generated key-binding stacks of the shape:
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(:minor-mode-replacements <STACK>
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:major-mode-replacements <STACK>
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:declare-prefix <STACK>
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:declare-prefix-for-mode <STACK>
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:set-leader-keys <STACK>
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:set-leader-keys-for-major-mode <STACK>
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:set-leader-keys-for-minor-mode <STACK>
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:global-replacements <STACK>
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:fn-key-seq-override <STACK>)"
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ctype bstack)
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(cl-defgeneric spacemacs//spacebind-dispatch (state binding)
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(:documentation "Based on BINDING type modify STATE using BINDING value."))
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(cl-defmethod spacemacs//spacebind-dispatch ((state spacemacs--spacebind-state)
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(keyword-or-symbol symbol))
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"If KEYWORD is a keyword, set STATE slot ctype(current type) to its value.
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If KEYWORD is a non-keyword symbol (without \":\" prefix in the name), wrap
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its value into a list and re-apply the function to it."
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(if (not (keywordp keyword-or-symbol))
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(spacemacs//spacebind-dispatch state (list keyword-or-symbol))
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(setf (spacemacs--spacebind-state-ctype state) keyword-or-symbol)
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state))
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(cl-defmethod spacemacs//spacebind-dispatch ((state spacemacs--spacebind-state)
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(sexp list))
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"Apply STATE method from ctype slot to SEXP."
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(funcall (spacemacs--spacebind-state-ctype state) state sexp)
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state)
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(cl-defmethod spacemacs//spacebind-dispatch ((state spacemacs--spacebind-state)
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(_ string))
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"Ignore strings - used to implement doc-strings."
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state)
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(defun spacemacs//spacebind-form-visitor (form path k-fn p-fn)
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"Applies K-FN to FORM if it is a key binding form. Otherwise applies P-FN.
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PATH passed to the applied function.
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NOTE: This function strips all newline characters, replaces successive spaces
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with a singular in string elements of FORM and trims tails of function labels
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delimited by \"|\" character."
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(list
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(cl-labels ((apply-str-fmt
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(el)
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(thread-last el
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;; Convert new lines and multiply spaces into singular.
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;; This is done to enable better code formatting.
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(replace-regexp-in-string "[\n[:space:]]+" " ")
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;; Discard everything after | symbol in labels.
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;; This way we can add extra text into the README.org
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;; files while omitting it in labels.
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(replace-regexp-in-string "[[:punct:][:space:]]*|.+" "")))
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(str-fmt-rec
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(depth el)
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(cond
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((stringp el) (apply-str-fmt el))
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((and (= depth 0)
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(listp el))
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;; We don't want to go deeper than a single level.
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(mapcar (apply-partially #'str-fmt-rec (1+ depth)) el))
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(t el)))
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(str-fmt
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(el)
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(str-fmt-rec 0 el)))
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(cl-destructuring-bind
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(key-or-prefix-form
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leader-label-or-fn-symbol
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leader-label-or-next-form)
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(mapcar #'str-fmt (seq-take form 3))
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(let ((full-key-or-prefix (append
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path
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;; ("key" :label "label") or "key".
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`(,(or (car-safe key-or-prefix-form)
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key-or-prefix-form))))
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(key-or-prefix-label (thread-first key-or-prefix-form
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(cdr-safe)
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(plist-get :label))))
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(if (symbolp leader-label-or-fn-symbol)
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(funcall k-fn
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full-key-or-prefix
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key-or-prefix-label
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leader-label-or-fn-symbol
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;; Either "label" or ("doc label" :label "label").
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(or (thread-first leader-label-or-next-form
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(cdr-safe)
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(plist-get :label))
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leader-label-or-next-form))
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(funcall p-fn full-key-or-prefix leader-label-or-fn-symbol)))))))
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(defun spacemacs//spacebind-form-walker-rec (path k-fn p-fn form)
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"Recursive body of `spacemacs//spacebind-form-walker'."
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(let* ((fn-sym-or-label (car-safe (cdr-safe form)))
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(prefix-form? (stringp fn-sym-or-label))
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(binding-form? (and fn-sym-or-label (symbolp fn-sym-or-label)))
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(list-of-forms? (and form (cl-every #'consp form)))
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(binding-or-prefix-form? (or binding-form?
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prefix-form?))
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(head (car form))
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(cur-path (if prefix-form?
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(append path `(,(or (car-safe head)
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head)))
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path))
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;; Strip key and label from prefix forms.
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(bindings (if prefix-form?
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(cddr form)
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form)))
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(append
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(when binding-or-prefix-form?
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(spacemacs//spacebind-form-visitor form path k-fn p-fn))
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(when (or prefix-form?
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list-of-forms?)
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(seq-mapcat
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(apply-partially
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'spacemacs//spacebind-form-walker-rec cur-path k-fn p-fn)
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bindings)))))
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(defun spacemacs//spacebind-form-walker (b-forms k-fn p-fn)
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"Part of `spacemacs--spacebind-state' interpreters implementation.
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B-FORMS is a root node of a binding tree without mode (car of the root form).
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K-FN called for each key binding node with 3 arguments: full_key_sequence,
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function_symbol and label_for_leader_menu.
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P-FN called for each prefix binding node with 2 arguments:
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full_key_prefix_sequence and label_for_leader_menu.
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Both K-FN and P-FN should return binding evaluation forms.
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The forms will be concatenated and substituted by `spacebind' macro."
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(spacemacs//spacebind-form-walker-rec nil k-fn p-fn b-forms))
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(defun spacemacs//spacebind-stack-push (state stack-k sexp)
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"Push SEXP onto stack specified by STACK-K in the STATE bstack plist slot."
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(cl-callf (lambda (bs)
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(plist-put bs stack-k (cons sexp (plist-get bs stack-k))))
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(spacemacs--spacebind-state-bstack state))
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state)
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;;;; Key bindings - keywords handlers
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(cl-defmethod :global ((state spacemacs--spacebind-state) form)
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"Interpreter for global binding forms."
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(spacemacs//spacebind-form-walker
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;; Strip optional doc-string.
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(if (char-or-string-p (car form))
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(cdr form)
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form)
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(lambda (key-seq key-label fn-symbol label)
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(spacemacs//spacebind-stack-push
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state
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:global-replacements `(,key-seq ,label))
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(spacemacs//spacebind-stack-push
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state
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:set-leader-keys `(,key-seq ,fn-symbol))
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(when key-label
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(spacemacs//spacebind-stack-push
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state
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:fn-key-seq-override `(,(symbol-name fn-symbol)
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,key-label
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,label))))
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(lambda (key-prefix label)
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(spacemacs//spacebind-stack-push
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state
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:declare-prefix `(,key-prefix ,label)))))
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(cl-defmethod :major ((state spacemacs--spacebind-state) form)
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"Interpreter for major mode binding forms."
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(let* ((form (spacebind//strip-docstring form))
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(mode (pop form)))
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(spacemacs//spacebind-form-walker
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form
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(lambda (key-seq key-label fn-symbol label)
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(spacemacs//spacebind-stack-push
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state
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:major-mode-replacements `(,mode ,key-seq ,label))
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(spacemacs//spacebind-stack-push
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state
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:set-leader-keys-for-major-mode `(,mode ,key-seq ,fn-symbol))
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(when key-label
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(spacemacs//spacebind-stack-push
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state
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:fn-key-seq-override `(,(symbol-name fn-symbol)
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,key-label
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,label))))
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(lambda (key-prefix label)
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(spacemacs//spacebind-stack-push
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state
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:declare-prefix-for-mode `(,mode ,key-prefix ,label))))))
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(cl-defmethod :minor ((state spacemacs--spacebind-state) form)
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"Interpreter for minor mode binding forms."
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(let* ((form (spacebind//strip-docstring form))
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(mode (pop form)))
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(spacemacs//spacebind-form-walker
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form
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(lambda (key-seq key-label fn-symbol label)
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(spacemacs//spacebind-stack-push
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state
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:minor-mode-replacements `(,mode ,key-seq ,label))
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(spacemacs//spacebind-stack-push
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state
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:set-leader-keys-for-minor-mode `(,mode ,key-seq ,fn-symbol))
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(when key-label
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(spacemacs//spacebind-stack-push
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state
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:fn-key-seq-override `(,(symbol-name fn-symbol)
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,key-label
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,label))))
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(lambda (key-prefix label)
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(spacemacs//spacebind-stack-push
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state
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:declare-prefix-for-mode `(,mode ,key-prefix ,label))))))
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(defmacro spacemacs|spacebind (&rest bindings)
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"Bind keys and their prefixes declared via BINDINGS tree like structure.
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BINDINGS format:
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<DELIMITER_KEYWORD>
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<BINDING_FORM>
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<BINDING_FORM>
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...
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<DELIMITER_KEYWORD>
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<BINDING_FORM>
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...
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...
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DELIMITER_KEYWORD - specifies a type of following <BINDING_FORM> (or forms).
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Currently supported types: :major, :minor and :global.
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:major and :minor bindings have this shape:
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(<MODE>
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<OPTIONAL_DOC_STRING>
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<PREFIX_OR_BINDING>
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<PREFIX_OR_BINDING>
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...)
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:global forms have a similar shape:
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(<OPTIONAL_DOC_STRING>
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<PREFIX_OR_BINDING>
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<PREFIX_OR_BINDING>
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...)
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<OPTIONAL_DOC_STRING> is a string that will be used to generate a key-bindings
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section in the corresponding README.org files.
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<PREFIX_OR_BINDING> is a recursive form that can be:
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A prefix form:
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(<PREFIX_KEY> <TEXT> <PREFIX_OR_BINDING>)
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Or a key-binding form:
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(<KEY> <FUNCTION_SYMBOL> <TEXT>)
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<TEXT> is what will be displayed in the menu and used for the documentation
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generation.
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<PREFIX_KEY> and <KEY> are singular keys represented as strings.
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<FUNCTION_SYMBOL> is the function that will be bound to the <KEY>.
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See core-spacebind-utest.el for examples.
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NOTE: This macro also has `use-package' integration via `:spacebind' key
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NOTE: <TEXT> strings support formatting:
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- \n and multiply spaces are converted into single spaces in the <TEXT>.
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- Everything after and including | symbol is ignored and punctuation
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before the character trimmed. This is done so you can provide additional
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information for the binding documentation while keeping labels brief.
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NOTE: You can override key labels and displayed key sequences with :label <TEXT>
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Example: ((\"k\" :label \"press k\")
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foo-fn
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(\"for docs\" :label \"displayed\"))
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\(fn <<DELIMITER_KEYWORD> <BINDING_FORMS>...>...)"
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(cl-list*
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'progn
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(let ((state (make-spacemacs--spacebind-state)))
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(dolist (sexp bindings)
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;; Fill stacks
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(spacemacs//spacebind-dispatch state sexp))
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(cl-flet ((get-stack (key) (thread-first state
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(spacemacs--spacebind-state-bstack)
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(plist-get key))))
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(seq-reduce
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(lambda (acc pair)
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(if-let ((stack (get-stack (car pair)))
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(stack-var (cadr pair)))
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;; We do it this way because `nconc' should have
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;; the shortest list as the first argument.
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(append acc `(,stack-var (nconc ',stack ,stack-var)))
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acc))
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`((:minor-mode-replacements
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spacebind--bs-minor-mode-replacements)
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|
(:major-mode-replacements
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|
spacebind--bs-major-mode-replacements)
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|
(:declare-prefix
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|
spacebind--bs-declare-prefix)
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|
(:declare-prefix-for-mode
|
|
spacebind--bs-declare-prefix-for-mode)
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|
(:set-leader-keys
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|
spacebind--bs-leader-keys)
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|
(:set-leader-keys-for-major-mode
|
|
spacebind--bs-leader-keys-for-major-mode)
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|
(:set-leader-keys-for-minor-mode
|
|
spacebind--bs-leader-keys-for-minor-mode)
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|
(:global-replacements
|
|
spacebind--bs-global-replacements)
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|
(:fn-key-seq-override
|
|
spacebind--bs-fn-key-seq-override))
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'(setq))))
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;; Schedule stacks processing with `spacebind//process-bind-stack' function.
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|
`((when (aref spacebind--timer 0)
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|
(if (not spacebind--eager-bind)
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(setq spacebind--timer
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(run-with-idle-timer 0 nil #'spacebind//process-bind-stack))
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(setq spacebind--timer [t])
|
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(spacebind//process-bind-stack))))))
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|
|
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(provide 'core-spacebind)
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