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;;; db-utils.el --- Utility Functions for Daniel's Emacs Configuration -*- lexical-binding: t -*-
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;;; Commentary:
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;;
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;; Some functions used in my ~/.emacs.d/init.el. Most of them are copied from
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;; various sources around the internet.
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;;
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;;; Code:
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(require 'subr-x)
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(require 'cl-lib)
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(require 'dash)
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(require 'db-customize)
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(require 'bookmark)
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(require 'term)
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(require 'nsm)
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(require 'compile)
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(require 'calc)
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(require 'calc-forms)
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(autoload 'async-start "async")
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(autoload 'lispy-mode "lispy")
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(autoload 'ldap-search "ldap")
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(declare-function w32-shell-execute "w32fns.c")
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;;; Application Shortcuts
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(defun db/run-or-hide-ansi-term ()
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"Find `*ansi-term*' or run `ansi-term' with `explicit-shell-file-name'.
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If already in `*ansi-term*' buffer, bury it."
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(interactive)
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(if (string= "term-mode" major-mode)
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(bury-buffer)
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(if (get-buffer "*ansi-term*")
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(switch-to-buffer "*ansi-term*")
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(ansi-term explicit-shell-file-name))))
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(defun db/gnus ()
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"Switch to the `*Group*' buffer, starting `gnus' if not existent."
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(interactive)
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(require 'gnus)
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(if (get-buffer "*Group*")
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(switch-to-buffer "*Group*")
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(gnus)))
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(defun db/org-agenda ()
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"Show the main `org-agenda'."
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(interactive)
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(org-agenda nil "A"))
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(defun db/scratch ()
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"Switch to `*scratch*'."
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(interactive)
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(switch-to-buffer "*scratch*"))
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(defun db/find-user-init-file ()
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"Edit `user-init-file'."
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(interactive)
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(find-file user-init-file))
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(defun db/run-or-hide-shell (arg)
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"Opens a shell buffer in new window if not already in one.
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Otherwise, closes the current shell window. With ARG, switch
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to `default-directory' of the current buffer first."
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;; idea to split the current window is from
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;; http://howardism.org/Technical/Emacs/eshell-fun.html
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(interactive "P")
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(cl-flet ((change-to-shell ()
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(if-let ((shell-window (db/find-window-by-buffer-mode 'shell-mode)))
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(select-window shell-window)
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;; open shell in buffer with height of ⅓ of current window
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(let ((height (/ (window-total-height) 3)))
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(shell)
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(enlarge-window (- height (window-total-height)))))))
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(if (not arg)
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;; toggle shell window
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(if (not (derived-mode-p 'shell-mode))
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(change-to-shell)
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(bury-buffer)
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(delete-window))
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;; unconditionally go to shell, and also change to cwd
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(let ((current-dir (expand-file-name default-directory)))
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(change-to-shell)
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(end-of-line)
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(comint-kill-input)
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(insert (format "cd '%s'" current-dir))
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(comint-send-input)))))
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;;; General Utilities
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(defun db/get-url-from-link ()
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"Copy url of link under point into clipboard."
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(interactive)
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(let ((url (plist-get (text-properties-at (point)) 'help-echo)))
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(if url
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(kill-new url)
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(error "No link found"))))
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(defun db/test-emacs ()
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;; from oremacs
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"Test whether emacs' configuration is not throwing any errors."
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(interactive)
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(require 'async)
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(async-start
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(lambda () (shell-command-to-string
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"emacs --batch --eval \"
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(condition-case e
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(progn
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(load \\\"~/.emacs.d/init.el\\\")
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(message \\\"-OK-\\\"))
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(error
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(message \\\"ERROR!\\\")
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(signal (car e) (cdr e))))\""))
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`(lambda (output)
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(if (string-match "-OK-" output)
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(when ,(called-interactively-p 'any)
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(message "All is well"))
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(switch-to-buffer-other-window "*startup error*")
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(delete-region (point-min) (point-max))
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(insert output)
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(search-backward "ERROR!")))))
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(defun db/isearch-forward-symbol-with-prefix (p)
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;; http://endlessparentheses.com/quickly-search-for-occurrences-of-the-symbol-at-point.html
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"Like `isearch-forward', unless prefix argument is provided.
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With a prefix argument P, isearch for the symbol at point."
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(interactive "P")
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(let ((current-prefix-arg nil))
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(call-interactively
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(if p
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#'isearch-forward-symbol-at-point
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#'isearch-forward))))
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(defun endless/fill-or-unfill ()
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"Like `fill-paragraph', but unfill if used twice."
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;; http://endlessparentheses.com/fill-and-unfill-paragraphs-with-a-single-key.html
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(interactive)
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(let ((fill-column
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(if (eq last-command 'endless/fill-or-unfill)
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(progn (setq this-command nil)
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(point-max))
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fill-column)))
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(call-interactively #'fill-paragraph)))
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(defun db/delete-trailing-whitespace-maybe ()
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"Call `delete-trailing-whitespace', but not in `message-mode'."
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(unless (derived-mode-p 'message-mode)
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(delete-trailing-whitespace)))
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(defun db/find-window-by-buffer-mode (mode)
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"Return first window in current frame displaying a buffer with
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major mode MODE."
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(cl-find-if (lambda (window)
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(with-current-buffer (window-buffer window)
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(eq major-mode mode)))
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(window-list-1)))
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(defun db/hex-to-ascii (hex-string)
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"Convert HEX-STRING to its ASCII equivalent.
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Allowed characters in hex-string are hexadecimal digits and
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whitespaces. If region is active, replace region by the
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corresponding ASCII string, otherwise query for input and display
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the result in the minibuffer."
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;; https://stackoverflow.com/questions/12003231/how-do-i-convert-a-string-of-hex-into-ascii-using-elisp
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(interactive (list (if (use-region-p)
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(buffer-substring-no-properties (region-beginning) (region-end))
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(read-from-minibuffer "String (hex): "))))
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(cl-assert (not (string-match-p "[^A-Fa-e0-9 \t\n]" hex-string))
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"String contains invalid characters.")
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(let ((result (->> hex-string
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(replace-regexp-in-string "[ \t\n]" "")
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(string-to-list)
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(-partition 2)
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(--map (string-to-number (concat it) 16))
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concat)))
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(if (use-region-p)
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(progn
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(delete-region (region-beginning) (region-end))
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(insert result))
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(message result))))
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(defun db/text-to-hex (text-string)
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"Convert TEXT-STRING to its hexadecimal representation.
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This function will return hexadecimal numbers with more than two
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digits if the input string contains wide characters. The result
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might depend on the coding system of the current buffer."
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(interactive (list (if (use-region-p)
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(buffer-substring-no-properties (region-beginning) (region-end))
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(read-from-minibuffer "String (ascii): "))))
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(let ((result (->> text-string
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(--map (format "%2X " it))
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(apply #'concat)
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(string-trim-right))))
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(if (use-region-p)
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(progn
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(delete-region (region-beginning) (region-end))
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(insert result))
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(message result))))
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(defun db/ntp-to-time (high low &optional format-string)
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"Format NTP time given by HIGH and LOW to time as given by FORMAT-STRING.
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HIGH and LOW must both be 8 digit hex strings. If not given,
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FORMAT-STRING defaults to some ISO 8601-like format."
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(interactive (cl-flet ((read-hex (prompt)
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(let ((input-proper (->> prompt
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(read-string)
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(replace-regexp-in-string "[\n\t ]" ""))))
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(if (not (string-match-p "[0-9a-fA-F]\\{8\\}" input-proper))
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(user-error "Input invalid, must be an 8 digit hex string.")
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(string-to-number input-proper 16)))))
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(list (read-hex "High (hex): ")
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(read-hex "Low (hex): "))))
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(let* ((calc-internal-prec 30)
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(unix-time (calcFunc-unixtime (calc-eval (format "%s - 2208988800 + (%s/4294967296)" high low)
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'raw)
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;; we explicitly call `calcFunc-unixtime'
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;; here to set the time zone to UTC
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0))
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(time-string (format (or format-string
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"%04d-%02d-%02dT%02d:%02d:%012.9fZ")
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(calcFunc-year unix-time)
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(calcFunc-month unix-time)
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(calcFunc-day unix-time)
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(calcFunc-hour unix-time)
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(calcFunc-minute unix-time)
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;; `seconds' will be a floating point number, and we need to format
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;; it with a precision that is high enough; apparently, we also need
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;; to truncate the number of seconds to nine digits, at least that
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;; is what has been done in the test example we use in the
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;; corresponding regression test …
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(string-to-number
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(calc-eval "trunc(second($), 9)" 'num unix-time)))))
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(if (called-interactively-p 'interactive)
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(message time-string)
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time-string)))
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(defun conditionally-enable-lispy ()
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"Enable lispy-mode when in `eval-expression’ or in
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`pp-eval-expression’. lispy must have been loaded for this
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first, i.e., this function will not automatically load
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lispy."
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(when (and (featurep 'lispy)
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(or (eq this-command 'eval-expression)
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(eq this-command 'pp-eval-expression)))
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(lispy-mode 1)))
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(defun turn-on-lispy-when-available ()
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"Activate `lispy’ in current buffer when possible.
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Will print a warning in case of failure."
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(interactive)
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(with-demoted-errors "Cannot activate lispy: %s"
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(require 'lispy)
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(lispy-mode)))
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(defun turn-on-flycheck-when-file ()
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"Turn on `flycheck-mode' when buffer is associated with a file."
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(when buffer-file-name
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(flycheck-mode +1)))
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(defun db/sort-nsm-permanent-settings ()
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"Sort values in `nsm-permanent-host-settings’."
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(setq nsm-permanent-host-settings
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(cl-sort nsm-permanent-host-settings
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#'string<
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:key #'cl-second)))
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(defun endless/colorize-compilation ()
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"Colorize from `compilation-filter-start' to `point'."
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;; http://endlessparentheses.com/ansi-colors-in-the-compilation-buffer-output.html
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(let ((inhibit-read-only t))
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(ansi-color-apply-on-region compilation-filter-start (point))))
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(defun db/turn-off-local-electric-pair-mode ()
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"Locally turn off electric pair mode."
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(interactive)
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(electric-pair-local-mode -1))
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(defun db/pretty-print-xml ()
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"Stupid function to pretty print XML content in current buffer."
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;; We assume that < and > only occur as XML tag delimiters, not in strings;
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;; this function is not Unicode-safe
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(interactive)
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(unless (eq major-mode 'nxml-mode)
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(require 'nxml-mode)
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(nxml-mode))
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(save-mark-and-excursion
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;; First make it all into one line
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(goto-char (point-min))
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(while (re-search-forward "\n[\t ]*" nil 'no-error)
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;; In case there was a space, we have to keep at least one as a separator
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(if (save-match-data (looking-back "[\t ]" 1))
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(replace-match " ")
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(replace-match "")))
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;; Next break between tags
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(goto-char (point-min))
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(while (re-search-forward ">[\t ]*<" nil 'no-error)
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(replace-match ">\n<"))
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;; Move opening and closing tags to same line in case there’s nothing in
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;; between
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(goto-char (point-min))
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(while (re-search-forward "<\\([^>]*\\)>\n</\\1>" nil 'no-error)
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(replace-match "<\\1></\\1>"))
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;; Indent
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(indent-region (point-min) (point-max))))
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(defun db/lookup-smime-key (mail)
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"Look up `MAIL' on ldap-server of the DFN.
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If found, imports the certificate via gpgsm."
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;; inspired by https://www.emacswiki.org/emacs/ExtendSMIME
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(interactive "sMail: ")
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(require 'ldap)
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(when (get-buffer " *ldap-value*")
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(kill-buffer " *ldap-value*"))
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(ldap-search (format "(mail=%s)" mail))
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(let ((bufval (get-buffer " *ldap-value*")))
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(when bufval
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(with-current-buffer bufval
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(save-restriction
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(widen) ; just to be sure
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(let ((result (call-process-region (point-min) (point-max)
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"gpgsm"
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nil nil nil
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"--import")))
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(if (zerop result)
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(message "Successfully imported certificate for <%s>" mail)
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(error "Could not import certificate for <%s>" mail))))))))
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;; https://emacs.stackexchange.com/questions/3089/how-can-i-create-a-dired-buffer-listing-all-open-files
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;; https://emacs.stackexchange.com/questions/2567/programmatically-insert-files-into-dired-buffer
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(defun db/dired-from-shell-command (command &optional directory)
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"Run COMMAND in DIRECTORY and display resulting list of files via `dired’.
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COMMAND must be a shell command that produces a list of files as
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output, separated by \\n, when called with
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`shell-command-to-string’. DIRECTORY defaults to
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`default-directory’."
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(interactive "sCommand: ")
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(when (and directory (not (directory-name-p directory)))
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(user-error "Value for DIRECTORY is not a directory name: %s"
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directory))
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(let* ((default-directory (or directory default-directory))
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(list-of-files (cl-remove-if-not
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(lambda (entry)
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(and (not (string-empty-p entry))
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(file-exists-p entry)
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(file-readable-p entry)))
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(split-string (shell-command-to-string command)
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"\n"))))
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(dired (cons "Command output" list-of-files))))
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(defun db/system-open (path)
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"Open PATH with default program as defined by the underlying system."
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(cond
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((eq system-type 'windows-nt)
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(w32-shell-execute "open" path))
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((eq system-type 'cygwin)
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(start-process "" nil "cygstart" path))
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(t
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(start-process "" nil "xdg-open" path))))
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(defun keyboard-quit-context+ ()
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"Quit current context.
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This function is a combination of `keyboard-quit' and
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`keyboard-escape-quit' with some parts omitted and some custom
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behavior added. When the minibuffer is active, quit it
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regardless of the currently selected window."
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;; https://with-emacs.com/posts/tips/quit-current-context/
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(interactive)
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(cond ((region-active-p)
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;; Avoid adding the region to the window selection.
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(setq saved-region-selection nil)
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(let (select-active-regions)
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(deactivate-mark)))
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((eq last-command 'mode-exited) nil)
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(current-prefix-arg
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nil)
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(defining-kbd-macro
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(message
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(substitute-command-keys
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"Quit is ignored during macro defintion, use \\[kmacro-end-macro] if you want to stop macro definition"))
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(cancel-kbd-macro-events))
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((active-minibuffer-window)
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(when (get-buffer-window "*Completions*")
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;; hide completions first so point stays in active window when
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;; outside the minibuffer
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(minibuffer-hide-completions))
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|
(abort-recursive-edit))
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|
(t
|
|
|
(when completion-in-region-mode
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|
|
(completion-in-region-mode -1))
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|
|
(let ((debug-on-quit nil))
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|
|
(signal 'quit nil)))))
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|
|
|
|
|
(defun db/convert-lf-to-crlf-in-buffer (&rest _stuff)
|
|
|
"Convert all LF to CRLF in current buffer.
|
|
|
Does not replace CRLF with CRCRLF, and so on."
|
|
|
(save-mark-and-excursion
|
|
|
(save-restriction
|
|
|
(widen)
|
|
|
(goto-char (point-min))
|
|
|
(while (re-search-forward "\n" nil 'noerror)
|
|
|
(unless (looking-back "\r\n" 2)
|
|
|
(replace-match "\r\n"))))))
|
|
|
|
|
|
(defun db/convert-crlf-to-lf-in-buffer (&rest _stuff)
|
|
|
"Convert all CRLF to LF in current buffer."
|
|
|
(save-mark-and-excursion
|
|
|
(save-restriction
|
|
|
(widen)
|
|
|
(goto-char (point-min))
|
|
|
(while (re-search-forward "\r\n" nil 'noerror)
|
|
|
(replace-match "\n")))))
|
|
|
|
|
|
(defun db/sync-magit-repos-from-projectile ()
|
|
|
"Update repositories known to magit from projectile's."
|
|
|
(interactive)
|
|
|
(require 'projectile)
|
|
|
(require 'magit)
|
|
|
(setq magit-repository-directories
|
|
|
(mapcar
|
|
|
(lambda (dir)
|
|
|
(cons (substring dir 0 -1) 0))
|
|
|
(cl-remove-if-not
|
|
|
(lambda (project)
|
|
|
(unless (file-remote-p project)
|
|
|
(file-exists-p (concat project "/.git"))))
|
|
|
projectile-known-projects))))
|
|
|
|
|
|
|
|
|
;;; Extend Input Methods
|
|
|
|
|
|
(defun db/add-symbols-to-TeX-input-method ()
|
|
|
"Add some new symbols to TeX input method."
|
|
|
(when (string= current-input-method "TeX")
|
|
|
(let ((quail-current-package (assoc "TeX" quail-package-alist)))
|
|
|
(quail-define-rules
|
|
|
((append . t))
|
|
|
("\\land" ?∧)
|
|
|
("\\lor" ?∨)
|
|
|
("\\lnot" ?¬)
|
|
|
("\\implies" ?⇒)
|
|
|
("\\powerset" ?𝔓)
|
|
|
("\\mathbbK" ?𝕂)
|
|
|
("\\mathbbR" ?ℝ)
|
|
|
("\\mathbbN" ?ℕ)
|
|
|
("\\mathbbZ" ?ℤ)
|
|
|
("\\mathbbP" ?ℙ)
|
|
|
("\\mathcalA" ?𝒜)
|
|
|
("\\mathcalB" ?ℬ)
|
|
|
("\\mathcalC" ?𝒞)
|
|
|
("\\mathcalD" ?𝒟)
|
|
|
("\\mathcalE" ?ℰ)
|
|
|
("\\mathcalH" ?ℋ)
|
|
|
("\\mathcalI" ?ℐ)
|
|
|
("\\mathcalJ" ?𝒥)
|
|
|
("\\mathcalK" ?𝒦)
|
|
|
("\\mathcalL" ?ℒ)
|
|
|
("\\mathcalM" ?ℳ)
|
|
|
("\\mathcalR" ?ℛ)
|
|
|
("\\mathcalQ" ?𝒬)
|
|
|
("\\mathcalS" ?𝒮)
|
|
|
("\\mathfrakP" ?𝔓)))))
|
|
|
|
|
|
|
|
|
;;; Wrappers for external applications
|
|
|
|
|
|
(defun db/two-monitors-xrandr ()
|
|
|
"Activate second monitor using xrandr."
|
|
|
(call-process "xrandr" nil nil nil
|
|
|
"--output" "HDMI-3" "--primary" "--right-of" "LVDS-1" "--auto"))
|
|
|
|
|
|
(defun db/one-monitor-xrandr ()
|
|
|
"Deactivate all additional monitors."
|
|
|
(call-process "xrandr" nil nil nil
|
|
|
"--output" "HDMI-3" "--off"))
|
|
|
|
|
|
|
|
|
;;; Bookmarks
|
|
|
|
|
|
(defun db/bookmark-add-with-handler (name location handler)
|
|
|
"Add NAME as bookmark to LOCATION and use HANDLER to open it.
|
|
|
HANDLER is a function receiving a single argument, namely
|
|
|
LOCATION. If a bookmark named NAME is already present, replace
|
|
|
it. The bookmarks will finally be sorted by their name."
|
|
|
(setq bookmark-alist
|
|
|
(cl-delete-if #'(lambda (bmk) (equal (car bmk) name))
|
|
|
bookmark-alist))
|
|
|
(push `(,name
|
|
|
(filename . ,location)
|
|
|
(handler . ,#'(lambda (arg)
|
|
|
(funcall handler (cdr (assoc 'filename arg))))))
|
|
|
bookmark-alist)
|
|
|
(setq bookmark-alist (cl-sort bookmark-alist #'string-lessp :key #'car)))
|
|
|
|
|
|
(defun db/bookmark-add-external (location name)
|
|
|
"Add NAME as bookmark to LOCATION that is opened by the operating system.
|
|
|
Offers simple completing from the list of recently opened files.
|
|
|
In dired, offer all marked files or the currently selected file
|
|
|
as completing instead."
|
|
|
(interactive (list (completing-read "Location: " (if (derived-mode-p 'dired-mode)
|
|
|
(dired-get-marked-files)
|
|
|
recentf-list))
|
|
|
(read-string "Name: ")))
|
|
|
(db/bookmark-add-with-handler name location #'db/system-open))
|
|
|
|
|
|
(defun db/bookmark-add-url (url name)
|
|
|
"Add NAME as bookmark to URL that is opened by `browse-url’."
|
|
|
(interactive "sURL: \nsName: ")
|
|
|
(db/bookmark-add-with-handler name url #'browse-url))
|
|
|
|
|
|
(defun db/bookmark-add-eww (url name)
|
|
|
"Add NAME as bookmark to URL to be opened with `eww’."
|
|
|
(interactive "sURL: \nsName: ")
|
|
|
(db/bookmark-add-with-handler name url #'eww))
|
|
|
|
|
|
|
|
|
;;; Appearance
|
|
|
|
|
|
(defun db/switch-to-dark-theme ()
|
|
|
"Switch to dark theme.
|
|
|
This is `db-dark' and `solarized-dark'."
|
|
|
(interactive)
|
|
|
(load-theme 'solarized-dark)
|
|
|
(load-theme 'db-dark))
|
|
|
|
|
|
(defun db/switch-to-light-theme ()
|
|
|
"Switch to dark theme.
|
|
|
This is `db-light' and `solarized-light'."
|
|
|
(interactive)
|
|
|
(load-theme 'solarized-light)
|
|
|
(load-theme 'db-light))
|
|
|
|
|
|
|
|
|
;;; End
|
|
|
|
|
|
(provide 'db-utils)
|
|
|
|
|
|
;;; db-utils.el ends here
|