633 lines
20 KiB
EmacsLisp
633 lines
20 KiB
EmacsLisp
;;; s.el --- The long lost Emacs string manipulation library.
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;; Copyright (C) 2012-2015 Magnar Sveen
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;; Author: Magnar Sveen <magnars@gmail.com>
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;; Version: 1.10.0
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;; Package-Version: 20160928.636
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;; Keywords: strings
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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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;;; Commentary:
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;; The long lost Emacs string manipulation library.
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;;
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;; See documentation on https://github.com/magnars/s.el#functions
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;;; Code:
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(require 'ucs-normalize)
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(defun s-trim-left (s)
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"Remove whitespace at the beginning of S."
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(save-match-data
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(if (string-match "\\`[ \t\n\r]+" s)
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(replace-match "" t t s)
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s)))
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(defun s-trim-right (s)
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"Remove whitespace at the end of S."
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(save-match-data
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(if (string-match "[ \t\n\r]+\\'" s)
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(replace-match "" t t s)
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s)))
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(defun s-trim (s)
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"Remove whitespace at the beginning and end of S."
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(s-trim-left (s-trim-right s)))
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(defun s-collapse-whitespace (s)
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"Convert all adjacent whitespace characters to a single space."
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(replace-regexp-in-string "[ \t\n\r]+" " " s))
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(defun s-split (separator s &optional omit-nulls)
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"Split S into substrings bounded by matches for regexp SEPARATOR.
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If OMIT-NULLS is non-nil, zero-length substrings are omitted.
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This is a simple wrapper around the built-in `split-string'."
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(save-match-data
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(split-string s separator omit-nulls)))
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(defun s-split-up-to (separator s n &optional omit-nulls)
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"Split S up to N times into substrings bounded by matches for regexp SEPARATOR.
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If OMIT-NULLS is non-nil, zero-length substrings are omitted.
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See also `s-split'."
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(save-match-data
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(let ((op 0)
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(r nil))
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(with-temp-buffer
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(insert s)
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(setq op (goto-char (point-min)))
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(while (and (re-search-forward separator nil t)
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(< 0 n))
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(let ((sub (buffer-substring op (match-beginning 0))))
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(unless (and omit-nulls
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(equal sub ""))
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(push sub r)))
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(setq op (goto-char (match-end 0)))
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(setq n (1- n)))
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(let ((sub (buffer-substring op (point-max))))
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(unless (and omit-nulls
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(equal sub ""))
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(push sub r))))
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(nreverse r))))
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(defun s-lines (s)
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"Splits S into a list of strings on newline characters."
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(s-split "\\(\r\n\\|[\n\r]\\)" s))
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(defun s-join (separator strings)
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"Join all the strings in STRINGS with SEPARATOR in between."
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(mapconcat 'identity strings separator))
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(defun s-concat (&rest strings)
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"Join all the string arguments into one string."
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(apply 'concat strings))
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(defun s-prepend (prefix s)
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"Concatenate PREFIX and S."
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(concat prefix s))
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(defun s-append (suffix s)
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"Concatenate S and SUFFIX."
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(concat s suffix))
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(defun s-repeat (num s)
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"Make a string of S repeated NUM times."
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(let (ss)
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(while (> num 0)
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(setq ss (cons s ss))
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(setq num (1- num)))
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(apply 'concat ss)))
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(defun s-chop-suffix (suffix s)
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"Remove SUFFIX if it is at end of S."
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(let ((pos (- (length suffix))))
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(if (and (>= (length s) (length suffix))
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(string= suffix (substring s pos)))
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(substring s 0 pos)
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s)))
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(defun s-chop-suffixes (suffixes s)
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"Remove SUFFIXES one by one in order, if they are at the end of S."
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(while suffixes
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(setq s (s-chop-suffix (car suffixes) s))
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(setq suffixes (cdr suffixes)))
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s)
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(defun s-chop-prefix (prefix s)
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"Remove PREFIX if it is at the start of S."
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(let ((pos (length prefix)))
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(if (and (>= (length s) (length prefix))
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(string= prefix (substring s 0 pos)))
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(substring s pos)
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s)))
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(defun s-chop-prefixes (prefixes s)
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"Remove PREFIXES one by one in order, if they are at the start of S."
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(while prefixes
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(setq s (s-chop-prefix (car prefixes) s))
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(setq prefixes (cdr prefixes)))
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s)
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(defun s-shared-start (s1 s2)
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"Returns the longest prefix S1 and S2 have in common."
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(let ((search-length (min (length s1) (length s2)))
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(i 0))
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(while (and (< i search-length)
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(= (aref s1 i) (aref s2 i)))
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(setq i (1+ i)))
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(substring s1 0 i)))
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(defun s-shared-end (s1 s2)
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"Returns the longest suffix S1 and S2 have in common."
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(let* ((l1 (length s1))
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(l2 (length s2))
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(search-length (min l1 l2))
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(i 0))
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(while (and (< i search-length)
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(= (aref s1 (- l1 i 1)) (aref s2 (- l2 i 1))))
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(setq i (1+ i)))
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;; If I is 0, then it means that there's no common suffix between
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;; S1 and S2.
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;;
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;; However, since (substring s (- 0)) will return the whole
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;; string, `s-shared-end' should simply return the empty string
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;; when I is 0.
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(if (zerop i)
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""
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(substring s1 (- i)))))
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(defun s-chomp (s)
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"Remove one trailing `\\n`, `\\r` or `\\r\\n` from S."
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(s-chop-suffixes '("\n" "\r") s))
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(defun s-truncate (len s)
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"If S is longer than LEN, cut it down to LEN - 3 and add ... at the end."
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(if (> (length s) len)
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(format "%s..." (substring s 0 (- len 3)))
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s))
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(defun s-word-wrap (len s)
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"If S is longer than LEN, wrap the words with newlines."
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(save-match-data
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(with-temp-buffer
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(insert s)
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(let ((fill-column len))
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(fill-region (point-min) (point-max)))
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(buffer-substring (point-min) (point-max)))))
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(defun s-center (len s)
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"If S is shorter than LEN, pad it with spaces so it is centered."
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(let ((extra (max 0 (- len (length s)))))
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(concat
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(make-string (ceiling extra 2) ? )
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s
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(make-string (floor extra 2) ? ))))
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(defun s-pad-left (len padding s)
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"If S is shorter than LEN, pad it with PADDING on the left."
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(let ((extra (max 0 (- len (length s)))))
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(concat (make-string extra (string-to-char padding))
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s)))
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(defun s-pad-right (len padding s)
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"If S is shorter than LEN, pad it with PADDING on the right."
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(let ((extra (max 0 (- len (length s)))))
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(concat s
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(make-string extra (string-to-char padding)))))
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(defun s-left (len s)
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"Returns up to the LEN first chars of S."
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(if (> (length s) len)
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(substring s 0 len)
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s))
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(defun s-right (len s)
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"Returns up to the LEN last chars of S."
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(let ((l (length s)))
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(if (> l len)
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(substring s (- l len) l)
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s)))
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(defun s-ends-with? (suffix s &optional ignore-case)
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"Does S end with SUFFIX?
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If IGNORE-CASE is non-nil, the comparison is done without paying
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attention to case differences.
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Alias: `s-suffix?'"
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(let ((start-pos (- (length s) (length suffix))))
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(and (>= start-pos 0)
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(eq t (compare-strings suffix nil nil
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s start-pos nil ignore-case)))))
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(defalias 's-ends-with-p 's-ends-with?)
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(defun s-starts-with? (prefix s &optional ignore-case)
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"Does S start with PREFIX?
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If IGNORE-CASE is non-nil, the comparison is done without paying
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attention to case differences.
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Alias: `s-prefix?'. This is a simple wrapper around the built-in
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`string-prefix-p'."
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(string-prefix-p prefix s ignore-case))
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(defalias 's-starts-with-p 's-starts-with?)
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(defalias 's-suffix? 's-ends-with?)
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(defalias 's-prefix? 's-starts-with?)
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(defalias 's-suffix-p 's-ends-with?)
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(defalias 's-prefix-p 's-starts-with?)
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(defun s--truthy? (val)
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(not (null val)))
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(defun s-contains? (needle s &optional ignore-case)
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"Does S contain NEEDLE?
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If IGNORE-CASE is non-nil, the comparison is done without paying
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attention to case differences."
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(let ((case-fold-search ignore-case))
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(s--truthy? (string-match-p (regexp-quote needle) s))))
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(defalias 's-contains-p 's-contains?)
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(defun s-equals? (s1 s2)
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"Is S1 equal to S2?
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This is a simple wrapper around the built-in `string-equal'."
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(string-equal s1 s2))
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(defalias 's-equals-p 's-equals?)
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(defun s-less? (s1 s2)
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"Is S1 less than S2?
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This is a simple wrapper around the built-in `string-lessp'."
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(string-lessp s1 s2))
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(defalias 's-less-p 's-less?)
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(defun s-matches? (regexp s &optional start)
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"Does REGEXP match S?
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If START is non-nil the search starts at that index.
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This is a simple wrapper around the built-in `string-match-p'."
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(s--truthy? (string-match-p regexp s start)))
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(defalias 's-matches-p 's-matches?)
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(defun s-blank? (s)
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"Is S nil or the empty string?"
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(or (null s) (string= "" s)))
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(defun s-blank-str? (s)
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"Is S nil or the empty string or string only contains whitespace?"
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(or (s-blank? s) (s-blank? (s-trim s))))
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(defun s-present? (s)
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"Is S anything but nil or the empty string?"
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(not (s-blank? s)))
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(defun s-presence (s)
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"Return S if it's `s-present?', otherwise return nil."
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(and (s-present? s) s))
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(defun s-lowercase? (s)
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"Are all the letters in S in lower case?"
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(let ((case-fold-search nil))
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(not (string-match-p "[[:upper:]]" s))))
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(defun s-uppercase? (s)
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"Are all the letters in S in upper case?"
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(let ((case-fold-search nil))
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(not (string-match-p "[[:lower:]]" s))))
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(defun s-mixedcase? (s)
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"Are there both lower case and upper case letters in S?"
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(let ((case-fold-search nil))
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(s--truthy?
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(and (string-match-p "[[:lower:]]" s)
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(string-match-p "[[:upper:]]" s)))))
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(defun s-capitalized? (s)
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"In S, is the first letter upper case, and all other letters lower case?"
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(let ((case-fold-search nil))
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(s--truthy?
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(string-match-p "^[[:upper:]][^[:upper:]]*$" s))))
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(defun s-numeric? (s)
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"Is S a number?"
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(s--truthy?
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(string-match-p "^[0-9]+$" s)))
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(defun s-replace (old new s)
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"Replaces OLD with NEW in S."
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(replace-regexp-in-string (regexp-quote old) new s t t))
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(defun s--aget (alist key)
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(cdr (assoc-string key alist)))
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(defun s-replace-all (replacements s)
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"REPLACEMENTS is a list of cons-cells. Each `car` is replaced with `cdr` in S."
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(replace-regexp-in-string (regexp-opt (mapcar 'car replacements))
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(lambda (it) (s--aget replacements it))
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s t t))
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(defun s-downcase (s)
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"Convert S to lower case.
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This is a simple wrapper around the built-in `downcase'."
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(downcase s))
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(defun s-upcase (s)
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"Convert S to upper case.
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This is a simple wrapper around the built-in `upcase'."
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(upcase s))
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(defun s-capitalize (s)
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"Convert the first word's first character to upper case and the rest to lower case in S."
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(concat (upcase (substring s 0 1)) (downcase (substring s 1))))
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(defun s-titleize (s)
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"Convert each word's first character to upper case and the rest to lower case in S.
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This is a simple wrapper around the built-in `capitalize'."
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(capitalize s))
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(defmacro s-with (s form &rest more)
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"Threads S through the forms. Inserts S as the last item
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in the first form, making a list of it if it is not a list
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already. If there are more forms, inserts the first form as the
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last item in second form, etc."
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(declare (debug (form &rest [&or (function &rest form) fboundp])))
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(if (null more)
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(if (listp form)
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`(,(car form) ,@(cdr form) ,s)
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(list form s))
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`(s-with (s-with ,s ,form) ,@more)))
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(put 's-with 'lisp-indent-function 1)
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(defun s-index-of (needle s &optional ignore-case)
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"Returns first index of NEEDLE in S, or nil.
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If IGNORE-CASE is non-nil, the comparison is done without paying
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attention to case differences."
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(let ((case-fold-search ignore-case))
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(string-match-p (regexp-quote needle) s)))
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(defun s-reverse (s)
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"Return the reverse of S."
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(if (multibyte-string-p s)
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(let ((input (string-to-list s))
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(output ()))
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(while input
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;; Handle entire grapheme cluster as a single unit
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(let ((grapheme (list (pop input))))
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(while (memql (car input) ucs-normalize-combining-chars)
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(push (pop input) grapheme))
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(setq output (nconc (nreverse grapheme) output))))
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(concat output))
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(concat (nreverse (string-to-list s)))))
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(defun s-match-strings-all (regex string)
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"Return a list of matches for REGEX in STRING.
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Each element itself is a list of matches, as per
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`match-string'. Multiple matches at the same position will be
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ignored after the first."
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(save-match-data
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(let ((all-strings ())
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(i 0))
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(while (and (< i (length string))
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(string-match regex string i))
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(setq i (1+ (match-beginning 0)))
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(let (strings
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(num-matches (/ (length (match-data)) 2))
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(match 0))
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(while (/= match num-matches)
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(push (match-string match string) strings)
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(setq match (1+ match)))
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(push (nreverse strings) all-strings)))
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(nreverse all-strings))))
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(defun s-matched-positions-all (regexp string &optional subexp-depth)
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"Return a list of matched positions for REGEXP in STRING.
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SUBEXP-DEPTH is 0 by default."
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(if (null subexp-depth)
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(setq subexp-depth 0))
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(save-match-data
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(let ((pos 0) result)
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(while (and (string-match regexp string pos)
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(< pos (length string)))
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(let ((m (match-end subexp-depth)))
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(push (cons (match-beginning subexp-depth) (match-end subexp-depth)) result)
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(setq pos (match-end 0))))
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(nreverse result))))
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(defun s-match (regexp s &optional start)
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"When the given expression matches the string, this function returns a list
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of the whole matching string and a string for each matched subexpressions.
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If it did not match the returned value is an empty list (nil).
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When START is non-nil the search will start at that index."
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(save-match-data
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(if (string-match regexp s start)
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(let ((match-data-list (match-data))
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result)
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(while match-data-list
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(let* ((beg (car match-data-list))
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(end (cadr match-data-list))
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(subs (if (and beg end) (substring s beg end) nil)))
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(setq result (cons subs result))
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(setq match-data-list
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(cddr match-data-list))))
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(nreverse result)))))
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(defun s-slice-at (regexp s)
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"Slices S up at every index matching REGEXP."
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(if (= 0 (length s)) (list "")
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(save-match-data
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(let (i)
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(setq i (string-match regexp s 1))
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(if i
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(cons (substring s 0 i)
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(s-slice-at regexp (substring s i)))
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(list s))))))
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(defun s-split-words (s)
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"Split S into list of words."
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(s-split
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"[^[:word:]0-9]+"
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(let ((case-fold-search nil))
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(replace-regexp-in-string
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"\\([[:lower:]]\\)\\([[:upper:]]\\)" "\\1 \\2"
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(replace-regexp-in-string "\\([[:upper:]]\\)\\([[:upper:]][0-9[:lower:]]\\)" "\\1 \\2" s)))
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t))
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(defun s--mapcar-head (fn-head fn-rest list)
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"Like MAPCAR, but applies a different function to the first element."
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(if list
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(cons (funcall fn-head (car list)) (mapcar fn-rest (cdr list)))))
|
|
|
|
(defun s-lower-camel-case (s)
|
|
"Convert S to lowerCamelCase."
|
|
(s-join "" (s--mapcar-head 'downcase 'capitalize (s-split-words s))))
|
|
|
|
(defun s-upper-camel-case (s)
|
|
"Convert S to UpperCamelCase."
|
|
(s-join "" (mapcar 'capitalize (s-split-words s))))
|
|
|
|
(defun s-snake-case (s)
|
|
"Convert S to snake_case."
|
|
(s-join "_" (mapcar 'downcase (s-split-words s))))
|
|
|
|
(defun s-dashed-words (s)
|
|
"Convert S to dashed-words."
|
|
(s-join "-" (mapcar 'downcase (s-split-words s))))
|
|
|
|
(defun s-capitalized-words (s)
|
|
"Convert S to Capitalized words."
|
|
(let ((words (s-split-words s)))
|
|
(s-join " " (cons (capitalize (car words)) (mapcar 'downcase (cdr words))))))
|
|
|
|
(defun s-titleized-words (s)
|
|
"Convert S to Titleized Words."
|
|
(s-join " " (mapcar 's-titleize (s-split-words s))))
|
|
|
|
(defun s-word-initials (s)
|
|
"Convert S to its initials."
|
|
(s-join "" (mapcar (lambda (ss) (substring ss 0 1))
|
|
(s-split-words s))))
|
|
|
|
;; Errors for s-format
|
|
(progn
|
|
(put 's-format-resolve
|
|
'error-conditions
|
|
'(error s-format s-format-resolve))
|
|
(put 's-format-resolve
|
|
'error-message
|
|
"Cannot resolve a template to values"))
|
|
|
|
(defun s-format (template replacer &optional extra)
|
|
"Format TEMPLATE with the function REPLACER.
|
|
|
|
REPLACER takes an argument of the format variable and optionally
|
|
an extra argument which is the EXTRA value from the call to
|
|
`s-format'.
|
|
|
|
Several standard `s-format' helper functions are recognized and
|
|
adapted for this:
|
|
|
|
(s-format \"${name}\" 'gethash hash-table)
|
|
(s-format \"${name}\" 'aget alist)
|
|
(s-format \"$0\" 'elt sequence)
|
|
|
|
The REPLACER function may be used to do any other kind of
|
|
transformation."
|
|
(let ((saved-match-data (match-data)))
|
|
(unwind-protect
|
|
(replace-regexp-in-string
|
|
"\\$\\({\\([^}]+\\)}\\|[0-9]+\\)"
|
|
(lambda (md)
|
|
(let ((var
|
|
(let ((m (match-string 2 md)))
|
|
(if m m
|
|
(string-to-number (match-string 1 md)))))
|
|
(replacer-match-data (match-data)))
|
|
(unwind-protect
|
|
(let ((v
|
|
(cond
|
|
((eq replacer 'gethash)
|
|
(funcall replacer var extra))
|
|
((eq replacer 'aget)
|
|
(funcall 's--aget extra var))
|
|
((eq replacer 'elt)
|
|
(funcall replacer extra var))
|
|
((eq replacer 'oref)
|
|
(funcall #'slot-value extra (intern var)))
|
|
(t
|
|
(set-match-data saved-match-data)
|
|
(if extra
|
|
(funcall replacer var extra)
|
|
(funcall replacer var))))))
|
|
(if v (format "%s" v) (signal 's-format-resolve md)))
|
|
(set-match-data replacer-match-data)))) template
|
|
;; Need literal to make sure it works
|
|
t t)
|
|
(set-match-data saved-match-data))))
|
|
|
|
(defvar s-lex-value-as-lisp nil
|
|
"If `t' interpolate lisp values as lisp.
|
|
|
|
`s-lex-format' inserts values with (format \"%S\").")
|
|
|
|
(defun s-lex-fmt|expand (fmt)
|
|
"Expand FMT into lisp."
|
|
(list 's-format fmt (quote 'aget)
|
|
(append '(list)
|
|
(mapcar
|
|
(lambda (matches)
|
|
(list
|
|
'cons
|
|
(cadr matches)
|
|
`(format
|
|
(if s-lex-value-as-lisp "%S" "%s")
|
|
,(intern (cadr matches)))))
|
|
(s-match-strings-all "${\\([^}]+\\)}" fmt)))))
|
|
|
|
(defmacro s-lex-format (format-str)
|
|
"`s-format` with the current environment.
|
|
|
|
FORMAT-STR may use the `s-format' variable reference to refer to
|
|
any variable:
|
|
|
|
(let ((x 1))
|
|
(s-lex-format \"x is: ${x}\"))
|
|
|
|
The values of the variables are interpolated with \"%s\" unless
|
|
the variable `s-lex-value-as-lisp' is `t' and then they are
|
|
interpolated with \"%S\"."
|
|
(declare (debug (form)))
|
|
(s-lex-fmt|expand format-str))
|
|
|
|
(defun s-count-matches (regexp s &optional start end)
|
|
"Count occurrences of `regexp' in `s'.
|
|
|
|
`start', inclusive, and `end', exclusive, delimit the part of `s'
|
|
to match. "
|
|
(save-match-data
|
|
(with-temp-buffer
|
|
(insert s)
|
|
(goto-char (point-min))
|
|
(count-matches regexp (or start 1) (or end (point-max))))))
|
|
|
|
(defun s-wrap (s prefix &optional suffix)
|
|
"Wrap string S with PREFIX and optionally SUFFIX.
|
|
|
|
Return string S with PREFIX prepended. If SUFFIX is present, it
|
|
is appended, otherwise PREFIX is used as both prefix and
|
|
suffix."
|
|
(concat prefix s (or suffix prefix)))
|
|
|
|
(provide 's)
|
|
;;; s.el ends here
|