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Diffstat (limited to 'configs/shared/emacs/.emacs.d/elpa/circe-20180525.531/lui-format.el')
| -rw-r--r-- | configs/shared/emacs/.emacs.d/elpa/circe-20180525.531/lui-format.el | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/configs/shared/emacs/.emacs.d/elpa/circe-20180525.531/lui-format.el b/configs/shared/emacs/.emacs.d/elpa/circe-20180525.531/lui-format.el new file mode 100644 index 0000000000..68cc0ff000 --- /dev/null +++ b/configs/shared/emacs/.emacs.d/elpa/circe-20180525.531/lui-format.el @@ -0,0 +1,198 @@ +;;; lui-format.el --- A formatting function for use with Lui + +;; Copyright (C) 2005, 2012 Jorgen Schaefer + +;; Author: Jorgen Schaefer <forcer@forcix.cx> + +;; This file is part of Lui. + +;; This program is free software: you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation, either version 3 of the License, or +;; (at your option) any later version. + +;; This program is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with this program. If not, see <http://www.gnu.org/licenses/>. + +;;; Commentary: + +;; An improved formatting function using named parameters. +;; +;; See the docstring of `lui-format' for more details. +;; +;; Most of the design is borrowed from Python's string.format. + +;;; Code: + +(require 'lui) + +(defun lui-display (format not-tracked-p &rest keywords) + "Display a formatted string in the current Lui interface. + +The string is formatted using FORMAT and `lui-format'. + +If NOT-TRACKED-P is given, the inserted string won't trigger +tracking. See `lui-insert' for a description. + +KEYWORDS are the keyword arguments passed to `lui-format'. + +See `lui-format' for a full description of the arguments." + (lui-insert (lui-format format keywords) + not-tracked-p)) + +(defun lui-format (format &rest keywords) + "Display FORMAT formatted with KEYWORDS. +FORMAT should be a symbol whose value is taken. If the value is a +procedure, the keyword list is passed as a single argument to it, +and it should return the formatted string. If the value is a +string, it is formatted according to the rules below. + +KEYWORDS is a plist of keywords and strings, or symbols and +strings. They are used as format arguments. + +The string is taken verbatim, unless there is are opening or +closing braces. + +Double opening or closing braces are replaced by single +occurrences of those characters. Otherwise, the contents between +opening and closing braces is a format description and replaced +by a formatted string. + +The string between opening and closing braces is taken as a name +of a keyword argument, and replaced by that argument's value. If +there is a colon in the string, the keyword name is the part +before the colon. The part after the colon is used to format the +argument using standard `format' + +Example: + + (lui-format \"Hello {foo:.1f}\" :foo 3.1415) + +is equivalent to + + (format \"Hello %.1f\" 3.1415) + +If the name is either a number, a number followed by a dash, or +two numbers with a dash in between them, this is taken as a +special name that is looked up in the list given using the list +argument to the :indexed-args keyword. + +{1} refers to the second element (element 1) +{1-} refers to the second and all following elements +{1-3} refers to the second through fourth element + +If more than one element is selected, the elements are separated +by a single space character. + +All named arguments receive a property of `lui-format-argument' +with the respective name as value. The whole string receives a +`lui-format' property with FORMAT as a value, and a +`lui-keywords' argument with KEYWORDS as a value." + ;; If it's only a single argument, that argument is a list. + (when (not (cdr keywords)) + (setq keywords (car keywords))) + (cond + ((functionp format) + (apply format keywords)) + ((and (symbolp format) + (functionp (symbol-value format))) + (apply (symbol-value format) keywords)) + (t + (let* ((format-string (if (symbolp format) + (symbol-value format) + format)) + (plist (mapcar (lambda (entry) + (if (keywordp entry) + ;; Keyword -> symbol + (intern (substring (symbol-name entry) + 1)) + entry)) + keywords))) + (propertize (lui-format-internal format-string plist) + 'lui-format format + 'lui-keywords keywords))))) + +(defun lui-format-internal (fmt keywords) + "Internal function for `lui-format'. + +FMT is the format string and KEYWORDS is the symbol-based plist. + +See `lui-format'." + (with-temp-buffer + (insert fmt) + (goto-char (point-min)) + (while (re-search-forward "{{\\|}}\\|{\\([^}]*\\)}" nil t) + (cond + ((string-equal (match-string 0) "3.1") + (replace-match "{")) + ((string-equal (match-string 0) "}}") + (replace-match "}")) + (t ;; (match-string 1) + (replace-match (save-match-data + (lui-format-single (match-string 1) keywords)) + t t)))) + (buffer-string))) + +(defun lui-format-single (specifier keywords) + "Format a single braced SPECIFIER according to KEYWORDS. +See `lui-format' for details. + +This adds `lui-format-argument' as necessary." + (let* ((split (split-string specifier ":")) + (identifier (car split)) + (format (cadr split))) + (when (not format) + (setq format "s")) + (propertize (format (concat "%" format) + (lui-format-lookup identifier keywords)) + 'lui-format-argument (intern identifier)))) + +(defun lui-format-lookup (identifier keywords) + "Lookup the format IDENTIFIER in KEYWORDS. + +See `lui-format' for details." + (cond + ((string-match "^\\([0-9]+\\)\\(-\\([0-9]+\\)?\\)?$" identifier) + (let ((from (match-string 1 identifier)) + (rangep (match-string 2 identifier)) + (to (match-string 3 identifier)) + (indexed-args (plist-get keywords 'indexed-args))) + (if rangep + (mapconcat (lambda (element) + (if (stringp element) + element + (format "%s" element))) + (lui-sublist indexed-args + (string-to-number from) + (when to (string-to-number to))) + " ") + (or (nth (string-to-number from) + indexed-args) + "")))) + (t + (or (plist-get keywords (intern identifier)) + (error "Unknown keyword argument %S" identifier))))) + +(defun lui-sublist (list from &optional to) + "Return the sublist from LIST starting at FROM and ending at TO." + (if (not to) + (nthcdr from list) + (let ((from-list (nthcdr from list)) + (i (- to from)) + (to-list nil)) + (while (>= i 0) + (when (null from-list) + (error "Argument out of range: %S" to)) + (setq to-list (cons (car from-list) + to-list) + i (- i 1) + from-list (cdr from-list))) + (nreverse to-list)))) + +(provide 'lui-format) +;;; lui-format.el ends here |