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Diffstat (limited to 'configs/shared/emacs/.emacs.d/elpa/flx-20151030.1112/flx.el')
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diff --git a/configs/shared/emacs/.emacs.d/elpa/flx-20151030.1112/flx.el b/configs/shared/emacs/.emacs.d/elpa/flx-20151030.1112/flx.el new file mode 100644 index 0000000000..889d255404 --- /dev/null +++ b/configs/shared/emacs/.emacs.d/elpa/flx-20151030.1112/flx.el @@ -0,0 +1,420 @@ +;;; flx.el --- fuzzy matching with good sorting + +;; Copyright © 2013, 2015 Le Wang + +;; Author: Le Wang +;; Maintainer: Le Wang +;; Description: fuzzy matching with good sorting +;; Created: Wed Apr 17 01:01:41 2013 (+0800) +;; Version: 0.6.1 +;; Package-Version: 20151030.1112 +;; Package-Requires: ((cl-lib "0.3")) +;; URL: https://github.com/lewang/flx + +;; This file is NOT part of GNU Emacs. + +;;; License + +;; 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, 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; see the file COPYING. If not, write to +;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth +;; Floor, Boston, MA 02110-1301, USA. + +;;; Commentary: + +;; Implementation notes +;; -------------------- +;; +;; Use defsubst instead of defun +;; +;; * Using bitmaps to check for matches worked out to be SLOWER than just +;; scanning the string and using `flx-get-matches'. +;; +;; * Consing causes GC, which can often slowdown Emacs more than the benefits +;; of an optimization. + +;;; Acknowledgments + +;; Scott Frazer's blog entry http://scottfrazersblog.blogspot.com.au/2009/12/emacs-better-ido-flex-matching.html +;; provided a lot of inspiration. +;; ido-hacks was helpful for ido optimization + +;;; Code: + +(require 'cl-lib) + +(defgroup flx nil + "Fuzzy matching with good sorting" + :group 'convenience + :prefix "flx-") + +(defcustom flx-word-separators '(?\ ?- ?_ ?: ?. ?/ ?\\) + "List of characters that act as word separators in flx" + :type '(repeat character) + :group 'flx) + +(defface flx-highlight-face '((t (:inherit font-lock-variable-name-face :bold t :underline t))) + "Face used by flx for highlighting flx match characters." + :group 'flx) + +;;; Do we need more word separators than ST? +(defsubst flx-word-p (char) + "Check if CHAR is a word character." + (and char + (not (memq char flx-word-separators)))) + +(defsubst flx-capital-p (char) + "Check if CHAR is an uppercase character." + (and char + (flx-word-p char) + (= char (upcase char)))) + +(defsubst flx-boundary-p (last-char char) + "Check if LAST-CHAR is the end of a word and CHAR the start of the next. + +This function is camel-case aware." + (or (null last-char) + (and (not (flx-capital-p last-char)) + (flx-capital-p char)) + (and (not (flx-word-p last-char)) + (flx-word-p char)))) + +(defsubst flx-inc-vec (vec &optional inc beg end) + "Increment each element of vectory by INC(default=1) +from BEG (inclusive) to END (not inclusive)." + (or inc + (setq inc 1)) + (or beg + (setq beg 0)) + (or end + (setq end (length vec))) + (while (< beg end) + (cl-incf (aref vec beg) inc) + (cl-incf beg)) + vec) + +(defun flx-get-hash-for-string (str heatmap-func) + "Return hash-table for string where keys are characters. +Value is a sorted list of indexes for character occurrences." + (let* ((res (make-hash-table :test 'eq :size 32)) + (str-len (length str)) + down-char) + (cl-loop for index from (1- str-len) downto 0 + for char = (aref str index) + do (progn + ;; simulate `case-fold-search' + (if (flx-capital-p char) + (progn + (push index (gethash char res)) + (setq down-char (downcase char))) + (setq down-char char)) + (push index (gethash down-char res)))) + (puthash 'heatmap (funcall heatmap-func str) res) + res)) + +;; So we store one fixnum per character. Is this too memory inefficient? +(defun flx-get-heatmap-str (str &optional group-separator) + "Generate the heatmap vector of string. + +See documentation for logic." + (let* ((str-len (length str)) + (str-last-index (1- str-len)) + ;; ++++ base + (scores (make-vector str-len -35)) + (penalty-lead ?.) + (groups-alist (list (list -1 0)))) + ;; ++++ final char bonus + (cl-incf (aref scores str-last-index) 1) + ;; Establish baseline mapping + (cl-loop for char across str + for index from 0 + with last-char = nil + with group-word-count = 0 + do (progn + (let ((effective-last-char + ;; before we find any words, all separaters are + ;; considered words of length 1. This is so "foo/__ab" + ;; gets penalized compared to "foo/ab". + (if (zerop group-word-count) nil last-char))) + (when (flx-boundary-p effective-last-char char) + (setcdr (cdar groups-alist) (cons index (cl-cddar groups-alist)))) + (when (and (not (flx-word-p last-char)) + (flx-word-p char)) + (cl-incf group-word-count))) + ;; ++++ -45 penalize extension + (when (eq last-char penalty-lead) + (cl-incf (aref scores index) -45)) + (when (eq group-separator char) + (setcar (cdar groups-alist) group-word-count) + (setq group-word-count 0) + (push (nconc (list index group-word-count)) groups-alist)) + (if (= index str-last-index) + (setcar (cdar groups-alist) group-word-count) + (setq last-char char)))) + (let* ((group-count (length groups-alist)) + (separator-count (1- group-count))) + ;; ++++ slash group-count penalty + (unless (zerop separator-count) + (flx-inc-vec scores (* -2 group-count))) + ;; score each group further + (cl-loop for group in groups-alist + for index from separator-count downto 0 + with last-group-limit = nil + with basepath-found = nil + do (let ((group-start (car group)) + (word-count (cadr group)) + ;; this is the number of effective word groups + (words-length (length (cddr group))) + basepath-p) + (when (and (not (zerop words-length)) + (not basepath-found)) + (setq basepath-found t) + (setq basepath-p t)) + (let (num) + (setq num + (if basepath-p + (+ 35 + ;; ++++ basepath separator-count boosts + (if (> separator-count 1) + (1- separator-count) + 0) + ;; ++++ basepath word count penalty + (- word-count)) + ;; ++++ non-basepath penalties + (if (= index 0) + -3 + (+ -5 (1- index))))) + (flx-inc-vec scores num (1+ group-start) last-group-limit)) + (cl-loop for word in (cddr group) + for word-index from (1- words-length) downto 0 + with last-word = (or last-group-limit + str-len) + do (progn + (cl-incf (aref scores word) + ;; ++++ beg word bonus AND + 85) + (cl-loop for index from word below last-word + for char-i from 0 + do (cl-incf (aref scores index) + (- + ;; ++++ word order penalty + (* -3 word-index) + ;; ++++ char order penalty + char-i))) + (setq last-word word))) + (setq last-group-limit (1+ group-start))))) + scores)) + +(defun flx-get-heatmap-file (filename) + "Return heatmap vector for filename." + (flx-get-heatmap-str filename ?/)) + + +(defsubst flx-bigger-sublist (sorted-list val) + "Return sublist bigger than VAL from sorted SORTED-LIST + + if VAL is nil, return entire list." + (if val + (cl-loop for sub on sorted-list + do (when (> (car sub) val) + (cl-return sub))) + sorted-list)) + +(defun flx-make-filename-cache () + "Return cache hashtable appropraite for storing filenames." + (flx-make-string-cache 'flx-get-heatmap-file)) + +(defun flx-make-string-cache (&optional heat-func) + "Return cache hashtable appropraite for storing strings." + (let ((hash (make-hash-table :test 'equal + :size 4096))) + (puthash 'heatmap-func (or heat-func 'flx-get-heatmap-str) hash) + hash)) + +(defun flx-process-cache (str cache) + "Get calculated heatmap from cache, add it if necessary." + (let ((res (when cache + (gethash str cache)))) + (or res + (progn + (setq res (flx-get-hash-for-string + str + (or (and cache (gethash 'heatmap-func cache)) + 'flx-get-heatmap-str))) + (when cache + (puthash str res cache)) + res)))) + +(defun flx-find-best-match (str-info + heatmap + greater-than + query + query-length + q-index + match-cache) + "Recursively compute the best match for a string, passed as STR-INFO and +HEATMAP, according to QUERY. + +This function uses MATCH-CACHE to memoize its return values. +For other parameters, see `flx-score'" + + ;; Here, we use a simple N'ary hashing scheme + ;; You could use (/ hash-key query-length) to get greater-than + ;; Or, (mod hash-key query-length) to get q-index + ;; We use this instead of a cons key for the sake of efficiency + (let* ((hash-key (+ q-index + (* (or greater-than 0) + query-length))) + (hash-value (gethash hash-key match-cache))) + (if hash-value + ;; Here, we use the value 'no-match to distinguish a cache miss + ;; from a nil (i.e. non-matching) return value + (if (eq hash-value 'no-match) + nil + hash-value) + (let ((indexes (flx-bigger-sublist + (gethash (aref query q-index) str-info) + greater-than)) + (match) + (temp-score) + (best-score most-negative-fixnum)) + + ;; Matches are of the form: + ;; ((match_indexes) . (score . contiguous-count)) + (if (>= q-index (1- query-length)) + ;; At the tail end of the recursion, simply + ;; generate all possible matches with their scores + ;; and return the list to parent. + (setq match (mapcar (lambda (index) + (cons (list index) + (cons (aref heatmap index) 0))) + indexes)) + (dolist (index indexes) + (dolist (elem (flx-find-best-match str-info + heatmap + index + query + query-length + (1+ q-index) + match-cache)) + (setq temp-score + (if (= (1- (caar elem)) index) + (+ (cadr elem) + (aref heatmap index) + + ;; boost contiguous matches + (* (min (cddr elem) + 3) + 15) + 60) + (+ (cadr elem) + (aref heatmap index)))) + + ;; We only care about the optimal match, so only + ;; forward the match with the best score to parent + (when (> temp-score best-score) + (setq best-score temp-score + match (list (cons (cons index (car elem)) + (cons temp-score + (if (= (1- (caar elem)) + index) + (1+ (cddr elem)) + 0))))))))) + + ;; Calls are cached to avoid exponential time complexity + (puthash hash-key + (if match match 'no-match) + match-cache) + match)))) + +(defun flx-score (str query &optional cache) + "Return best score matching QUERY against STR" + (unless (or (zerop (length query)) + (zerop (length str))) + (let* + ((str-info (flx-process-cache str cache)) + (heatmap (gethash 'heatmap str-info)) + (query-length (length query)) + (full-match-boost (and (< 1 query-length) + (< query-length 5))) + + ;; Raise recursion limit + (max-lisp-eval-depth 5000) + (max-specpdl-size 10000) + + ;; Dynamic Programming table for memoizing flx-find-best-match + (match-cache (make-hash-table :test 'eql :size 10)) + + (optimal-match (flx-find-best-match str-info + heatmap + nil + query + query-length + 0 + match-cache))) + ;; Postprocess candidate + (and optimal-match + (cons + ;; This is the computed score, adjusted to boost the scores + ;; of exact matches. + (if (and full-match-boost + (= (length (caar optimal-match)) + (length str))) + (+ (cl-cadar optimal-match) 10000) + (cl-cadar optimal-match)) + + ;; This is the list of match positions + (caar optimal-match)))))) + +(defun flx-propertize (obj score &optional add-score) + "Return propertized copy of obj according to score. + +SCORE of nil means to clear the properties." + (let ((block-started (cadr score)) + (last-char nil) + (str (if (consp obj) + (substring-no-properties (car obj)) + (substring-no-properties obj)))) + + (when score + (dolist (char (cdr score)) + (when (and last-char + (not (= (1+ last-char) char))) + (put-text-property block-started (1+ last-char) 'face 'flx-highlight-face str) + (setq block-started char)) + (setq last-char char)) + (put-text-property block-started (1+ last-char) 'face 'flx-highlight-face str) + (when add-score + (setq str (format "%s [%s]" str (car score))))) + (if (consp obj) + (cons str (cdr obj)) + str))) + + + +(defvar flx-file-cache nil + "Cached heatmap info about strings.") + +;;; reset value on every file load. +(setq flx-file-cache (flx-make-filename-cache)) + +(defvar flx-strings-cache nil + "Cached heatmap info about filenames.") + +;;; reset value on every file load. +(setq flx-strings-cache (flx-make-string-cache)) + + +(provide 'flx) + +;;; flx.el ends here |