272 lines
11 KiB
EmacsLisp
272 lines
11 KiB
EmacsLisp
;;; -*- lexical-binding: t -*-
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;;; core-micro-state.el --- Spacemacs Core File
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;;
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;; Copyright (c) 2012-2017 Sylvain Benner & Contributors
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;;
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;; Author: Sylvain Benner <sylvain.benner@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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;;; License: GPLv3
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(defun spacemacs/defface-micro-state-faces ()
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"Define faces for micro-states."
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(let* ((hname 'spacemacs-micro-state-header-face)
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(bname 'spacemacs-micro-state-binding-face)
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(box '(:line-width -1 :color (plist-get (face-attribute
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'mode-line :box) :color)))
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(err (face-attribute 'error :foreground)))
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(eval `(defface ,hname '((t ()))
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"Face for micro-state header in echo area.
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The header is the name of the micro-state."
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:group 'spacemacs))
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(set-face-attribute hname nil
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:background "DarkGoldenrod2"
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:foreground "black"
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:bold t
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:box box)
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(eval `(defface ,bname '((t ()))
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"Face for micro-state key binding in echo area.
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Characters enclosed in `[]' will have this face applied to them."
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:group 'spacemacs))
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(set-face-attribute bname nil
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:foreground err
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:bold t)))
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(spacemacs/defface-micro-state-faces)
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(add-hook 'spacemacs-post-theme-change-hook
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'spacemacs/defface-micro-state-faces)
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(defun spacemacs//micro-state-set-minibuffer-height (str)
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"Set the max mini windows size given a string STR."
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(let ((line-count (1+ (spacemacs/how-many-str "\n" str))))
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(when (and (> line-count max-mini-window-height)
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(> line-count 10))
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(setq max-mini-window-height line-count))))
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(defmacro spacemacs|define-micro-state (name &rest props)
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"Define a micro-state called NAME.
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NAME is a symbol.
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Available PROPS:
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`:on-enter SEXP'
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Evaluate SEXP when the micro-state is switched on.
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`:on-exit SEXP'
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Evaluate SEXP when leaving the micro-state.
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`:doc STRING or SEXP'
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A STRING or a SEXP that evaluates to a string.
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`:use-minibuffer BOOLEAN'
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If non nil then the minibuffer is used to display the documenation
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strings. Default is nil.
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`:disable-evil-leader BOOLEAN'
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If non nil then the evil leader has no effect when the micro state
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is active. Default to nil.
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`:persistent BOOLEAN'
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If BOOLEAN is non nil then the micro-state never exits. A binding
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with an explicitly set `exit t' property is required. Default is nil.
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`:execute-binding-on-enter BOOLEAN'
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If BOOLEAN is non nil then execute the micro-state command bound to
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to the pressed key that started the micro-state.
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`:bindings EXPRESSIONS'
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One or several EXPRESSIONS with the form
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(STRING1 SYMBOL1 :doc STRING
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:pre SEXP
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:post SEXP
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:exit SYMBOL)
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where:
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- STRING1 is a key to be bound to the function or key map SYMBOL1.
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- :doc STRING or SEXP is a STRING or an SEXP that evalutes
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to a string
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- :pre is an SEXP evaluated before the bound action
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- :post is an SEXP evaluated after the bound action
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- :exit SYMBOL or SEXP, if non nil then pressing this key will
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leave the micro-state (default is nil).
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Important note: due to inner working of transient-maps in Emacs
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the `:exit' keyword is evaluate *before* the actual execution
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of the bound command.
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All properties supported by `spacemacs//create-key-binding-form' can be
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used."
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(declare (indent 1))
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(let* ((func (spacemacs//micro-state-func-name name))
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(doc (spacemacs/mplist-get props :doc))
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(persistent (plist-get props :persistent))
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(disable-leader (plist-get props :disable-evil-leader))
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(msg-func (if (plist-get props :use-minibuffer)
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'message
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'lv-message))
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(exec-binding (plist-get props :execute-binding-on-enter))
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(on-enter (spacemacs/mplist-get props :on-enter))
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(on-exit (spacemacs/mplist-get props :on-exit))
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(bindings (spacemacs/mplist-get props :bindings))
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(wrappers (spacemacs//micro-state-create-wrappers
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name doc msg-func disable-leader bindings))
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(keymap-body (spacemacs//micro-state-fill-map-sexps wrappers))
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(bindkeys (spacemacs//create-key-binding-form props func)))
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`(progn (defun ,func ()
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,(format "%S micro-state." name)
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(interactive)
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,@on-enter
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,(when exec-binding
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(spacemacs//micro-state-auto-execute bindings))
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(let ((doc ,@doc))
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(when doc
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(spacemacs//micro-state-set-minibuffer-height doc)
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(apply ',msg-func (list (spacemacs//micro-state-propertize-doc
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(format "%S: %s" ',name doc))))))
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(,(if (version< emacs-version "24.4")
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'set-temporary-overlay-map
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'set-transient-map)
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(let ((map (make-sparse-keymap)))
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,@keymap-body map) ',(spacemacs//micro-state-create-exit-func
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name wrappers persistent on-exit)))
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,@bindkeys)))
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(defun spacemacs//micro-state-func-name (name)
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"Return the name of the micro-state function."
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(intern (format "spacemacs/%S-micro-state" name)))
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(defun spacemacs//micro-state-auto-execute (bindings)
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"Auto execute the binding corresponding to `this-command-keys'."
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`(let* ((key (substring (this-command-keys)
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(1- (length (this-command-keys)))))
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(binding (assoc key ',bindings)))
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(when binding
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(call-interactively (cadr binding)))))
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(defun spacemacs//micro-state-create-wrappers
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(name doc msg-func disable-leader bindings)
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"Return an alist (key wrapper) for each binding in BINDINGS."
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(mapcar (lambda (x) (spacemacs//micro-state-create-wrapper
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name doc msg-func x))
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(append bindings
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;; force SPC to quit the micro-state to avoid a edge case
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;; with evil-leader
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(list `(,dotspacemacs-leader-key
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,(unless disable-leader 'spacemacs-default-map)
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:exit t)))))
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(defun spacemacs//micro-state-create-wrapper (name default-doc msg-func binding)
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"Create a wrapper of FUNC and return a tuple (key wrapper BINDING)."
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(let* ((key (car binding))
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(wrapped (cadr binding))
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(binding-doc (spacemacs/mplist-get binding :doc))
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(binding-pre (spacemacs/mplist-get binding :pre))
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(binding-post (spacemacs/mplist-get binding :post))
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(wrapper-name (intern (format "spacemacs//%S-%S-%s" name wrapped key)))
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(doc-body
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`((let ((bdoc ,@binding-doc)
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(defdoc ,@default-doc))
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(cond
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(bdoc
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(apply ',msg-func
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(list (spacemacs//micro-state-propertize-doc
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(format "%S: %s" ',name bdoc))))
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bdoc)
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((and defdoc
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',wrapped
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(not (plist-get ',binding :exit)))
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(spacemacs//micro-state-set-minibuffer-height defdoc)
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(apply ',msg-func
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(list (spacemacs//micro-state-propertize-doc
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(format "%S: %s" ',name defdoc))))
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defdoc)))))
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(wrapper-func
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(if (and (boundp wrapped)
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(eval `(keymapp ,wrapped)))
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wrapped
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`(defun ,wrapper-name ()
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"Auto-generated function"
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(interactive)
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,@binding-pre
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(let ((throwp t))
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(catch 'exit
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(when (fboundp ',wrapped)
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(setq this-command ',wrapped)
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(call-interactively ',wrapped)
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(setq last-command ',wrapped))
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(setq throwp nil))
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,@binding-post
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(when throwp (throw 'exit nil)))
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(when ,@doc-body
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(spacemacs//micro-state-set-minibuffer-height ,@doc-body)
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,@doc-body)))))
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(append (list (car binding) (eval wrapper-func)) binding)))
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(defun spacemacs//micro-state-fill-map-sexps (wrappers)
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"Return a list of `define-key' sexp to fill the micro-state temporary map."
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(mapcar (lambda (x) `(define-key map ,(kbd (car x)) ',(cadr x)))
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wrappers))
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(defun spacemacs//micro-state-create-exit-func
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(name wrappers persistent on-exit)
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"Return a function to execute when leaving the micro-state.
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The returned function returns nil if the executed command exits the
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micro-state."
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(let ((func (intern (format "spacemacs//%s-on-exit" name))))
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(eval `(defun ,func ()
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"Function executed after each micro-state command."
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(let* ((cur-wrapper (spacemacs//get-current-wrapper
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',name ',wrappers))
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(exitp (if cur-wrapper (plist-get cur-wrapper :exit)
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,(not persistent))))
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(when (listp exitp) (setq exitp (eval exitp)))
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(when exitp ,@on-exit (spacemacs//micro-state-close-window))
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(not exitp))))))
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(defun spacemacs//get-current-wrapper (name wrappers)
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"Return the wrapper being executed.
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Return nil if no wrapper is being executed (i.e. an unbound key has been
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pressed)."
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(let ((micro-state-fun (spacemacs//micro-state-func-name name)))
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(catch 'found
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(dolist (wrapper wrappers)
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(let ((key (car wrapper))
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(func (cadr wrapper)))
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(if (and (or (eq this-command micro-state-fun)
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(eq this-command func))
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(equal (this-command-keys) (kbd key)))
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(throw 'found wrapper))))
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nil)))
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(defun spacemacs//micro-state-propertize-doc (doc)
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"Return a propertized doc string from DOC."
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(when (string-match "^\\(.+?\\):\\([[:ascii:]]*\\)$" doc)
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(let* ((header (match-string 1 doc))
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(pheader (when header
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(propertize (concat " " header " ")
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'face 'spacemacs-micro-state-header-face)))
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(tail (spacemacs//micro-state-propertize-doc-rec
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(match-string 2 doc))))
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(concat pheader tail))))
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(defun spacemacs//micro-state-propertize-doc-rec (doc)
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"Recursively propertize keys"
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(if (string-match "^\\([[:ascii:]]*?\\)\\(\\[.+?\\]\\)\\([[:ascii:]]*\\)$" doc)
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(let* ((head (match-string 1 doc))
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(key (match-string 2 doc))
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(pkey (when key
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(propertize key 'face 'spacemacs-micro-state-binding-face)))
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(tail (spacemacs//micro-state-propertize-doc-rec
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(match-string 3 doc))))
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(concat head pkey tail))
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doc))
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(defun spacemacs//micro-state-close-window ()
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"Close micro-state help window."
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(when (window-live-p lv-wnd)
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(let ((buf (window-buffer lv-wnd)))
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(delete-window lv-wnd)
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(kill-buffer buf))))
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(provide 'core-micro-state)
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