473 lines
17 KiB
EmacsLisp
473 lines
17 KiB
EmacsLisp
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;;; helm-sys.el --- System related functions for helm. -*- lexical-binding: t -*-
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;; Copyright (C) 2012 ~ 2023 Thierry Volpiatto
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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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;; 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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;; 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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;;; Code:
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(require 'cl-lib)
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(require 'helm)
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(require 'helm-help)
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(require 'helm-utils)
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(defgroup helm-sys nil
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"System related helm library."
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:group 'helm)
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(defface helm-top-columns
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`((t ,@(and (>= emacs-major-version 27) '(:extend t))
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:inherit helm-header))
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"Face for helm help string in minibuffer."
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:group 'helm-sys)
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(defcustom helm-top-command
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(cl-case system-type
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(darwin "env COLUMNS=%s ps -axo pid,user,pri,nice,ucomm,tty,start_time,vsz,%%cpu,%%mem,etime,command")
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(t "env COLUMNS=%s top -b -n 1"))
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"Top command used to display output of top.
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A format string where %s will be replaced with `frame-width'.
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To use 'top' command, a version supporting batch mode (-b option)
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is needed. On Mac OSX 'top' command doesn't support this, so the
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'ps' command is used instead by default.
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Normally 'top' command output have 12 columns, but in some
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versions you may have less than this, so you can either customize
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'top' to use 12 columns with the interactives 'f' and 'W' commands
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of 'top', or modify `helm-top-sort-columns-alist' to fit with the
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number of columns your 'top' command is using.
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If you modify 'ps' command be sure that 'pid' comes in first and
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\"env COLUMNS=%s\" is specified at beginning of command. Ensure
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also that no elements contain spaces (e.g., use start_time and
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not start). Same as for 'top': you can customize
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`helm-top-sort-columns-alist' to make sort commands working
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properly according to your settings."
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:group 'helm-sys
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:type 'string)
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(defcustom helm-top-sort-columns-alist '((com . 11)
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(mem . 9)
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(cpu . 8)
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(user . 1))
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"Allow defining which column to use when sorting output of top/ps command.
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Only com, mem, cpu and user are sorted, so no need to put something
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else there,it will have no effect.
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Note that column numbers are counted from zero, i.e. column 1 is the
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nth 0 column."
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:group 'helm-sys
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:type '(alist :key-type symbol :value-type (integer :tag "Column number")))
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(defcustom helm-top-poll-delay 1.5
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"Helm top poll after this delay when `helm-top-poll-mode' is enabled.
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The minimal delay allowed is 1.5, if less than this helm-top will use 1.5."
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:group 'helm-sys
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:type 'float)
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(defcustom helm-top-poll-delay-post-command 1.0
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"Helm top stop polling during this delay.
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This delay is added to `helm-top-poll-delay' after Emacs stops
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being idle."
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:group 'helm-sys
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:type 'float)
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(defcustom helm-top-poll-preselection 'linum
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"Stay on same line or follow candidate when `helm-top-poll' updates display.
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Possible values are \\='candidate or \\='linum.
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This affects also sorting functions in the same way."
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:group'helm-sys
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:type '(radio :tag "Preferred preselection action for helm-top"
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(const :tag "Follow candidate" candidate)
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(const :tag "Stay on same line" linum)))
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;;; Top (process)
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;;
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;;
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(defvar helm-top-sort-fn nil)
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(defvar helm-top-map
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(let ((map (make-sparse-keymap)))
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(set-keymap-parent map helm-map)
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(define-key map (kbd "M-P") 'helm-top-run-sort-by-cpu)
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(define-key map (kbd "M-C") 'helm-top-run-sort-by-com)
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(define-key map (kbd "M-M") 'helm-top-run-sort-by-mem)
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(define-key map (kbd "M-U") 'helm-top-run-sort-by-user)
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map))
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(defvar helm-top-after-init-hook nil
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"Local hook for helm-top.")
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(defvar helm-top--poll-timer nil)
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(defun helm-top-poll (&optional no-update delay)
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(when helm-top--poll-timer
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(cancel-timer helm-top--poll-timer))
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(condition-case nil
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(progn
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(when (and (helm--alive-p) (null no-update))
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;; Fix quitting while process is running
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;; by binding `with-local-quit' in init function
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;; Bug#1521.
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(helm-force-update
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(cl-ecase helm-top-poll-preselection
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(candidate (replace-regexp-in-string
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"[0-9]+" "[0-9]+"
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(regexp-quote (helm-get-selection nil t))))
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(linum `(lambda ()
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(goto-char (point-min))
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(forward-line ,(helm-candidate-number-at-point)))))))
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(setq helm-top--poll-timer
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(run-with-idle-timer
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(helm-aif (current-idle-time)
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(time-add it (seconds-to-time
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(or delay (helm-top--poll-delay))))
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(or delay (helm-top--poll-delay)))
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nil
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'helm-top-poll)))
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(quit (cancel-timer helm-top--poll-timer))))
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(defun helm-top--poll-delay ()
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(max 1.5 helm-top-poll-delay))
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(defun helm-top-poll-no-update ()
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(helm-top-poll t (+ (helm-top--poll-delay)
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helm-top-poll-delay-post-command)))
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(defun helm-top-initialize-poll-hooks ()
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;; When Emacs is idle during say 20s
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;; the idle timer will run in 20+1.5 s.
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;; This is fine when Emacs stays idle, because the next timer
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;; will run at 21.5+1.5 etc... so the display will be updated
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;; at every 1.5 seconds.
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;; But as soon as emacs looses its idleness, the next update
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;; will occur at say 21+1.5 s, so we have to reinitialize
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;; the timer at 0+1.5.
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(add-hook 'post-command-hook 'helm-top-poll-no-update)
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(add-hook 'focus-in-hook 'helm-top-poll-no-update))
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;;;###autoload
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(define-minor-mode helm-top-poll-mode
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"Refresh automatically helm top buffer once enabled."
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:group 'helm-top
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:global t
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(if helm-top-poll-mode
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(progn
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(add-hook 'helm-top-after-init-hook 'helm-top-poll-no-update)
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(add-hook 'helm-top-after-init-hook 'helm-top-initialize-poll-hooks))
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(remove-hook 'helm-top-after-init-hook 'helm-top-poll-no-update)
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(remove-hook 'helm-top-after-init-hook 'helm-top-initialize-poll-hooks)))
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(defvar helm-source-top
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(helm-build-in-buffer-source "Top"
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:header-name (lambda (name)
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(concat name (if helm-top-poll-mode
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" (auto updating)"
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" (Press C-c C-u to refresh)")))
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:init #'helm-top-init
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:after-init-hook 'helm-top-after-init-hook
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:cleanup (lambda ()
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(when helm-top--poll-timer
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(cancel-timer helm-top--poll-timer))
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(remove-hook 'post-command-hook 'helm-top-poll-no-update)
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(remove-hook 'focus-in-hook 'helm-top-poll-no-update))
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:display-to-real #'helm-top-display-to-real
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:persistent-action '(helm-top-sh-persistent-action . never-split)
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:persistent-help "SIGTERM"
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:help-message 'helm-top-help-message
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:mode-line 'helm-top-mode-line
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:follow 'never
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:keymap helm-top-map
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:filtered-candidate-transformer #'helm-top-sort-transformer
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:action-transformer #'helm-top-action-transformer
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:group 'helm-sys))
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(defvar helm-top--line nil)
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(defun helm-top-transformer (candidates _source)
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"Transformer for `helm-top'.
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Return empty string for non--valid candidates."
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(cl-loop for disp in candidates collect
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(cond ((string-match "^ *[0-9]+" disp) disp)
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((string-match "^ *PID" disp)
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(setq helm-top--line (cons (propertize disp 'face 'helm-top-columns) "")))
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(t (cons disp "")))
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into lst
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finally return (or (member helm-top--line lst)
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(cons helm-top--line lst))))
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(defun helm-top--skip-top-line ()
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(let* ((src (helm-get-current-source))
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(src-name (assoc-default 'name src)))
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(helm-aif (and (stringp src-name)
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(string= src-name "Top")
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(helm-get-selection nil t src))
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(when (string-match-p "^ *PID" it)
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(helm-next-line)))))
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(defun helm-top-action-transformer (actions _candidate)
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"Action transformer for `top'.
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Show actions only on line starting by a PID."
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(let ((disp (helm-get-selection nil t)))
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(cond ((string-match "\\` *[0-9]+" disp)
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(list '("kill (SIGTERM)" . (lambda (_pid)
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(helm-top-sh "TERM" (helm-top--marked-pids))))
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'("kill (SIGKILL)" . (lambda (_pid)
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(helm-top-sh "KILL" (helm-top--marked-pids))))
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'("kill (SIGINT)" . (lambda (_pid)
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(helm-top-sh "INT" (helm-top--marked-pids))))
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'("kill (Choose signal)"
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. (lambda (_pid)
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(let ((pids (helm-top--marked-pids)))
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(helm-top-sh
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(helm-comp-read (format "Kill %d pids with signal: "
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(length pids))
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'("ALRM" "HUP" "INT" "KILL" "PIPE" "POLL"
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"PROF" "TERM" "USR1" "USR2" "VTALRM"
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"STKFLT" "PWR" "WINCH" "CHLD" "URG"
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"TSTP" "TTIN" "TTOU" "STOP" "CONT"
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"ABRT" "FPE" "ILL" "QUIT" "SEGV"
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"TRAP" "SYS" "EMT" "BUS" "XCPU" "XFSZ")
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:must-match t)
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pids))))))
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(t actions))))
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(defun helm-top--marked-pids ()
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(helm-remove-if-not-match "\\`[0-9]+\\'" (helm-marked-candidates)))
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(defun helm-top-sh (sig pids)
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"Run kill shell command with signal SIG on PIDS for `helm-top'."
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(message "kill -%s %s exited with status %s"
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sig (mapconcat 'identity pids " ")
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(apply #'call-process
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"kill" nil nil nil (format "-%s" sig) pids)))
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(defun helm-top-sh-persistent-action (pid)
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(helm-top-sh "TERM" (list pid))
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(helm-delete-current-selection))
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(defun helm-top-init ()
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"Insert output of top command in candidate buffer."
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(with-local-quit
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(unless helm-top-sort-fn (helm-top-set-mode-line "CPU"))
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(with-current-buffer (helm-candidate-buffer 'global)
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(call-process-shell-command
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(format helm-top-command (frame-width))
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nil (current-buffer)))))
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(defun helm-top-display-to-real (line)
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"Return pid only from LINE."
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(car (split-string line)))
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;; Sort top command
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(defun helm-top-set-mode-line (str)
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(if (string-match "Sort:\\[\\(.*\\)\\] " helm-top-mode-line)
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(setq helm-top-mode-line (replace-match str nil nil helm-top-mode-line 1))
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(setq helm-top-mode-line (concat (format "Sort:[%s] " str) helm-top-mode-line))))
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(defun helm-top-sort-transformer (candidates source)
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(helm-top-transformer
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(if helm-top-sort-fn
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(cl-loop for c in candidates
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if (string-match "^ *[0-9]+" c)
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collect c into pid-cands
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else collect c into header-cands
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finally return (append
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header-cands
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(sort pid-cands helm-top-sort-fn)))
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candidates)
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source))
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(defun helm-top-sort-by-com (s1 s2)
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(let* ((split-1 (split-string s1))
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(split-2 (split-string s2))
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(col (cdr (assq 'com helm-top-sort-columns-alist)))
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(com-1 (nth col split-1))
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(com-2 (nth col split-2)))
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(string< com-1 com-2)))
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(defun helm-top-sort-by-mem (s1 s2)
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(let* ((split-1 (split-string s1))
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(split-2 (split-string s2))
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(col (cdr (assq 'mem helm-top-sort-columns-alist)))
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(mem-1 (string-to-number (nth col split-1)))
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(mem-2 (string-to-number (nth col split-2))))
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(> mem-1 mem-2)))
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(defun helm-top-sort-by-cpu (s1 s2)
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(let* ((split-1 (split-string s1))
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(split-2 (split-string s2))
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(col (cdr (assq 'cpu helm-top-sort-columns-alist)))
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(cpu-1 (string-to-number (nth col split-1)))
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(cpu-2 (string-to-number (nth col split-2))))
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(> cpu-1 cpu-2)))
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(defun helm-top-sort-by-user (s1 s2)
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|
(let* ((split-1 (split-string s1))
|
|||
|
|
(split-2 (split-string s2))
|
|||
|
|
(col (cdr (assq 'user helm-top-sort-columns-alist)))
|
|||
|
|
(user-1 (nth col split-1))
|
|||
|
|
(user-2 (nth col split-2)))
|
|||
|
|
(string< user-1 user-2)))
|
|||
|
|
|
|||
|
|
(defun helm-top--preselect-fn ()
|
|||
|
|
(if (eq helm-top-poll-preselection 'linum)
|
|||
|
|
`(lambda ()
|
|||
|
|
(goto-char (point-min))
|
|||
|
|
(forward-line ,(helm-candidate-number-at-point)))
|
|||
|
|
(replace-regexp-in-string
|
|||
|
|
"[0-9]+" "[0-9]+"
|
|||
|
|
(regexp-quote (helm-get-selection nil t)))))
|
|||
|
|
|
|||
|
|
(defun helm-top-run-sort-by-com ()
|
|||
|
|
(interactive)
|
|||
|
|
(helm-top-set-mode-line "COM")
|
|||
|
|
(setq helm-top-sort-fn 'helm-top-sort-by-com)
|
|||
|
|
(helm-update (helm-top--preselect-fn)))
|
|||
|
|
|
|||
|
|
(defun helm-top-run-sort-by-cpu ()
|
|||
|
|
(interactive)
|
|||
|
|
(helm-top-set-mode-line "CPU")
|
|||
|
|
;; Force sorting by CPU even if some versions of top are using by
|
|||
|
|
;; default CPU sorting (Bug#1908).
|
|||
|
|
(setq helm-top-sort-fn 'helm-top-sort-by-cpu)
|
|||
|
|
(helm-update (helm-top--preselect-fn)))
|
|||
|
|
|
|||
|
|
(defun helm-top-run-sort-by-mem ()
|
|||
|
|
(interactive)
|
|||
|
|
(helm-top-set-mode-line "MEM")
|
|||
|
|
(setq helm-top-sort-fn 'helm-top-sort-by-mem)
|
|||
|
|
(helm-update (helm-top--preselect-fn)))
|
|||
|
|
|
|||
|
|
(defun helm-top-run-sort-by-user ()
|
|||
|
|
(interactive)
|
|||
|
|
(helm-top-set-mode-line "USER")
|
|||
|
|
(setq helm-top-sort-fn 'helm-top-sort-by-user)
|
|||
|
|
(helm-update (helm-top--preselect-fn)))
|
|||
|
|
|
|||
|
|
|
|||
|
|
;;; X RandR resolution change
|
|||
|
|
;;
|
|||
|
|
;;
|
|||
|
|
;;; FIXME I do not care multi-display.
|
|||
|
|
|
|||
|
|
(defun helm-xrandr-info ()
|
|||
|
|
"Return a pair with current X screen number and current X display name."
|
|||
|
|
(with-temp-buffer
|
|||
|
|
(call-process "xrandr" nil (current-buffer) nil
|
|||
|
|
"--current")
|
|||
|
|
(let (screen output)
|
|||
|
|
(goto-char (point-min))
|
|||
|
|
(save-excursion
|
|||
|
|
(when (re-search-forward "\\(^Screen \\)\\([0-9]\\):" nil t)
|
|||
|
|
(setq screen (match-string 2))))
|
|||
|
|
(when (re-search-forward "^\\(.*\\) connected" nil t)
|
|||
|
|
(setq output (match-string 1)))
|
|||
|
|
(list screen output))))
|
|||
|
|
|
|||
|
|
(defun helm-xrandr-screen ()
|
|||
|
|
"Return current X screen number."
|
|||
|
|
(car (helm-xrandr-info)))
|
|||
|
|
|
|||
|
|
(defun helm-xrandr-output ()
|
|||
|
|
"Return current X display name."
|
|||
|
|
(cadr (helm-xrandr-info)))
|
|||
|
|
|
|||
|
|
(defvar helm-source-xrandr-change-resolution
|
|||
|
|
(helm-build-sync-source "Change Resolution"
|
|||
|
|
:candidates
|
|||
|
|
(lambda ()
|
|||
|
|
(with-temp-buffer
|
|||
|
|
(call-process "xrandr" nil (current-buffer) nil
|
|||
|
|
"--screen" (helm-xrandr-screen) "-q")
|
|||
|
|
(goto-char 1)
|
|||
|
|
(cl-loop while (re-search-forward " \\([0-9]+x[0-9]+\\)" nil t)
|
|||
|
|
for mode = (match-string 1)
|
|||
|
|
unless (member mode modes)
|
|||
|
|
collect mode into modes
|
|||
|
|
finally return modes)))
|
|||
|
|
:action
|
|||
|
|
(helm-make-actions "Change Resolution"
|
|||
|
|
(lambda (mode)
|
|||
|
|
(call-process "xrandr" nil nil nil
|
|||
|
|
"--screen" (helm-xrandr-screen)
|
|||
|
|
"--output" (helm-xrandr-output)
|
|||
|
|
"--mode" mode)))))
|
|||
|
|
|
|||
|
|
|
|||
|
|
;;; Emacs process
|
|||
|
|
;;
|
|||
|
|
;;
|
|||
|
|
(defvar helm-source-emacs-process
|
|||
|
|
(helm-build-sync-source "Emacs Process"
|
|||
|
|
:init (lambda ()
|
|||
|
|
(let (tabulated-list-use-header-line)
|
|||
|
|
(list-processes--refresh)))
|
|||
|
|
:candidates (lambda () (mapcar #'process-name (process-list)))
|
|||
|
|
:candidate-transformer
|
|||
|
|
(lambda (candidates)
|
|||
|
|
(cl-loop for c in candidates
|
|||
|
|
for command = (mapconcat
|
|||
|
|
'identity
|
|||
|
|
(process-command (get-process c)) " ")
|
|||
|
|
if (and command (not (string= command ""))) collect
|
|||
|
|
(cons (concat c " --> "
|
|||
|
|
(mapconcat 'identity
|
|||
|
|
(process-command (get-process c)) " "))
|
|||
|
|
c)
|
|||
|
|
else collect c))
|
|||
|
|
:multiline t
|
|||
|
|
:persistent-action (lambda (elm)
|
|||
|
|
(delete-process (get-process elm))
|
|||
|
|
(helm-delete-current-selection))
|
|||
|
|
:persistent-help "Kill Process"
|
|||
|
|
:action (helm-make-actions "Kill Process"
|
|||
|
|
(lambda (_elm)
|
|||
|
|
(cl-loop for p in (helm-marked-candidates)
|
|||
|
|
do (delete-process (get-process p)))))))
|
|||
|
|
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun helm-top ()
|
|||
|
|
"Preconfigured `helm' for top command."
|
|||
|
|
(interactive)
|
|||
|
|
(add-hook 'helm-after-update-hook 'helm-top--skip-top-line)
|
|||
|
|
(unwind-protect
|
|||
|
|
(helm :sources 'helm-source-top
|
|||
|
|
:buffer "*helm top*" :full-frame t
|
|||
|
|
:candidate-number-limit 9999
|
|||
|
|
:preselect "^\\s-*[0-9]+"
|
|||
|
|
:truncate-lines helm-show-action-window-other-window)
|
|||
|
|
(remove-hook 'helm-after-update-hook 'helm-top--skip-top-line)))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun helm-list-emacs-process ()
|
|||
|
|
"Preconfigured `helm' for Emacs process."
|
|||
|
|
(interactive)
|
|||
|
|
(helm :sources 'helm-source-emacs-process
|
|||
|
|
:truncate-lines t
|
|||
|
|
:buffer "*helm process*"))
|
|||
|
|
|
|||
|
|
;;;###autoload
|
|||
|
|
(defun helm-xrandr-set ()
|
|||
|
|
"Preconfigured helm for xrandr."
|
|||
|
|
(interactive)
|
|||
|
|
(helm :sources 'helm-source-xrandr-change-resolution
|
|||
|
|
:buffer "*helm xrandr*"))
|
|||
|
|
|
|||
|
|
(provide 'helm-sys)
|
|||
|
|
|
|||
|
|
;;; helm-sys.el ends here
|