├── COPYING ├── README.md ├── wand-helper.el └── wand.el /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Wand # 2 | 3 | Wand is an extension that allows users perform actions on a region based on predefined patterns. Wand is inspired by Xiki[1] and Acme[2]. 4 | 5 | * Screencast (Upcoming - April/May 2019) 6 | 7 | ## Requirements ## 8 | 9 | * Emacs 25+ 10 | 11 | * [Dash](https://github.com/magnars/dash.el) - for list processing 12 | 13 | * [s.el](https://github.com/magnars/s.el) - for string processing 14 | 15 | ## Installation ## 16 | 17 | Thanks to [@yasuyk](https://github.com/yasuyk) Wand is available in MELPA. Installation process is now as simple as `M-x package-install RET wand RET`. 18 | 19 | If you don't have MELPA setup, the following migh suffice: 20 | 21 | ```elisp 22 | (add-to-list 'package-archives '("melpa" . "http://melpa.milkbox.net/packages/")) 23 | (package-initialize) 24 | (package-install 'wand) 25 | (require 'wand) 26 | ``` 27 | 28 | If you use Emacs 26+, it's recommend to use Wand with `use-package`: 29 | 30 | ```elisp 31 | (use-package wand 32 | :ensure t 33 | :config (...)) 34 | ``` 35 | 36 | ## Usage ## 37 | 38 | Wand works by going through a list of rules, stored in the `wand:*rules*` variable (which should be customized to be useful). Each rule has the meaning of "if satisfied, perform an action; otherwise pass to the next rule" and is a cons of `(rule-check-fn . action-fn)`: 39 | 40 | * `rule-check-fn` is a one-argument function, taking a string and returns `t` or `nil`, determining if the string satisfies the current rule 41 | 42 | * `action-fn` is also a one-argument function, taking the same string and performing action(s). 43 | 44 | After setting the rules, we simply call `wand:execute` with the corresponding string. 45 | 46 | Manually creating all the rules from ground up is possible but usually tedious. Hence, Wand provides the `wand:create-rule` helper to facilitate the creation of a rule. `wand:create-rule` takes several arguments describing the process of matching and extracting a string and the action performed upon. Essentially, `wand:create-rule` cares about the following questions: 47 | 48 | * What is the regexp that the string is checked against to determine if the rule is satisfied? (The `match` argument) 49 | 50 | * If the string satisfies the rule, how is it then passed to the action function? (The `capture` argument, options are: `:after` - extracting the string after the match, `:whole` - pass the whole string, `nil` - pass `nil`, or an extractor function taking the string and returning the processed string) 51 | 52 | * What is the action that the extracted/processed string is performed upon? (The `action` argument) 53 | 54 | * Is the current comment stripped before processing the string? (The `skip-comment` argument). Comments are stripped by default. 55 | 56 | Here is an example of how it would look like in practice: 57 | 58 | ``` elisp 59 | (setq wand:*rules* 60 | (list (wand:create-rule :match "\\$ " 61 | :capture :after 62 | :action #'popup-shell-command) 63 | (wand:create-rule :match "https?://" 64 | :capture :whole 65 | :action #'open-url-in-firefox) 66 | (wand:create-rule :match "file:" 67 | :capture :after 68 | :action #'find-file) 69 | (wand:create-rule :match "#> " 70 | :capture :after 71 | :action #'(lambda (string) 72 | (eval (read string)))))) 73 | ``` 74 | 75 | When calling `wand:execute `, the following would happen: 76 | 77 | * If the string is `;; $ ls`, call `(popup-shell-command "ls")` 78 | 79 | * If the string is `http://google.com` or `https://google.com`, call `(open-url-in-firefox )`. 80 | 81 | * If the string is `file:~/tmp/tmp.el`, call `(find-file "~/tmp/tmp/.el")`. 82 | 83 | * If the string is `#> (message-box "¡Hola a todos!")`, eval `(message-box "¡Hola a todos!")`. 84 | 85 | * With any other string, the string is `eval`-ed with `wand:eval-string`. This the default action for all unmatched strings. 86 | 87 | The string could span through multiple lines. If `skip-comment` is `t`, comments are stripped from all the lines. 88 | 89 | It's recommended to bind `wand:execute` to a key stroke and/or mouse for quick command execution. 90 | 91 | ```elisp 92 | (global-set-key (kbd "") 'wand:execute) 93 | (global-set-key (kbd "") 'wand:execute) 94 | (global-set-key (kbd "") nil) 95 | ``` 96 | 97 | ## Thanks ## 98 | 99 | Special thanks to: 100 | 101 | * [@yasuyk](https://github.com/yasuyk) for making Wand available in Melpa. 102 | 103 | * [@MatthewDarling](https://github.com/MatthewDarling) for correcting code 104 | example in README. 105 | 106 | * [@syl20bnr](https://github.com/syl20bnr) for the issue report. 107 | 108 | * [@rubikitch](https://github.com/rubikitch) 109 | for 110 | [fixing the `string-empty?` typo](https://github.com/cmpitg/wand/pull/9). 111 | 112 | ## License ## 113 | 114 | This project along with its source code and all materials are released under the terms of the GNU General Public License 3.0 (GPLv3). See [COPYING](COPYING) for more details. 115 | 116 | Copyright (C) 2014-2019 Ha-Duong Nguyen 117 | -------------------------------------------------------------------------------- /wand-helper.el: -------------------------------------------------------------------------------- 1 | ;;; wand-helper.el --- Helpers for Wand 2 | 3 | ;; Copyright (C) 2014-2022 Ha-Duong Nguyen (@cmpitg) 4 | 5 | ;; Author: Ha-Duong Nguyen 6 | ;; Keywords: extensions, tools 7 | 8 | ;; This program is free software; you can redistribute it and/or modify 9 | ;; it under the terms of the GNU General Public License as published by 10 | ;; the Free Software Foundation, either version 3 of the License, or 11 | ;; (at your option) any later version. 12 | 13 | ;; This program is distributed in the hope that it will be useful, 14 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 15 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 | ;; GNU General Public License for more details. 17 | 18 | ;; You should have received a copy of the GNU General Public License 19 | ;; along with this program. If not, see . 20 | 21 | ;;; Commentary: 22 | 23 | 24 | ;;; Code: 25 | 26 | (require 'cl-lib) 27 | 28 | (defun wand-helper:find (pred xs) 29 | "Finds and returns the first element from the list XS that satisfies PRED. 30 | If no element is found, returns nil." 31 | (cl-loop for x in xs 32 | when (funcall pred x) 33 | return x)) 34 | 35 | (defun wand-helper:get-selection () 36 | "Returns the current region/selection if exists. If not, 37 | returns an empty string." 38 | (if (region-active-p) 39 | (buffer-substring (region-beginning) 40 | (region-end)) 41 | "")) 42 | 43 | (defun wand-helper:eval-string (string) 44 | "Evals a string non-interactively." 45 | (eval (read string))) 46 | 47 | (cl-defun wand-helper:maybe-uncomment-string (str skip-comment? 48 | &key 49 | major-mode-fn) 50 | "Uncomments a string if `skip-comment?' is `t'. The comment 51 | syntax is defined by the major mode, denoted by `major-mode-fn'." 52 | (if skip-comment? 53 | (with-temp-buffer 54 | (insert str) 55 | (funcall major-mode-fn) 56 | 57 | (let ((comment-start (if (null comment-start) ";" comment-start)) 58 | (comment-end (if (null comment-end) "" comment-end))) 59 | 60 | ;; NOTE: This check exists as a hack, due to org-mode's breaking `UNCOMMENT-REGION' 61 | (ignore-errors 62 | (unless (equal major-mode 'org-mode) 63 | (uncomment-region (point-min) (point-max)))) 64 | 65 | (buffer-string))) 66 | str)) 67 | 68 | (provide 'wand-helper) 69 | ;;; wand-helper.el ends here 70 | -------------------------------------------------------------------------------- /wand.el: -------------------------------------------------------------------------------- 1 | ;;; wand.el --- Magic wand for Emacs - Select and execute -*- lexical-binding: t; -*- 2 | 3 | ;; Copyright (C) 2014-2022 Ha-Duong Nguyen (@cmpitg) 4 | 5 | ;; Author: Ha-Duong Nguyen 6 | ;; Keywords: extensions, tools 7 | ;; URL: https://github.com/cmpitg/wand 8 | ;; Package-Requires: () 9 | 10 | ;; This program is free software; you can redistribute it and/or modify it 11 | ;; under the terms of the GNU General Public License as published by the Free 12 | ;; Software Foundation, either version 3 of the License, or (at your option) 13 | ;; any later version. 14 | 15 | ;; This program is distributed in the hope that it will be useful, but WITHOUT 16 | ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 | ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 18 | ;; more details. 19 | 20 | ;; You should have received a copy of the GNU General Public License along 21 | ;; with this program. If not, see . 22 | 23 | ;;; Commentary: 24 | 25 | ;; Wand is an extension that allows users perform actions on a region based on 26 | ;; predefined patterns. Wand is inspired by Xiki[1] and Acme[2]. 27 | ;; 28 | 29 | ;;; Installation: 30 | 31 | ;; Thanks to @yasuyk, Wand is available in MELPA. Make sure you have MELPA 32 | ;; repository added to `package-archives' and simply call `package-install': 33 | ;; 34 | ;; (add-to-list 'package-archives '("melpa" . "http://melpa.milkbox.net/packages/")) 35 | ;; (package-initialize) 36 | ;; (package-install 'wand) 37 | ;; 38 | ;; Or `M-x package-install RET wand RET`. 39 | ;; 40 | ;; Then `require' it: 41 | ;; 42 | ;; (require 'wand) 43 | 44 | ;;; Usage: 45 | 46 | ;; Wand works by going through a list of rules, stored in the `wand:*rules*' 47 | ;; variable (which should be customized to be useful). Each rule has the 48 | ;; meaning of "if satisfied, perform an action; otherwise pass to the next 49 | ;; rule" and is a cons of `(rule-check-fn . action-fn)': 50 | ;; 51 | ;; * `rule-check-fn' is a one-argument function, taking a string and returns 52 | ;; `t' or `nil', determining if the string satisfies the current rule 53 | ;; 54 | ;; * `action-fn' is also a one-argument function, taking the same string and 55 | ;; performing action(s). 56 | ;; 57 | ;; After setting the rules, we simply call `wand:execute' with the 58 | ;; corresponding string. 59 | ;; 60 | ;; Manually creating all the rules from ground up is possible but usually 61 | ;; tedious. Hence, Wand provides the `wand:create-rule' helper to facilitate 62 | ;; the creation of a rule. `wand:create-rule' takes several arguments 63 | ;; describing the process of matching and extracting a string and the action 64 | ;; performed upon. Essentially, `wand:create-rule' cares about the following 65 | ;; questions: 66 | ;; 67 | ;; * What is the regexp that the string is checked against to determine if the 68 | ;; rule is satisfied? (The `match' argument) 69 | ;; 70 | ;; * If the string satisfies the rule, how is it then passed to the action 71 | ;; function? (The `capture' argument, options are: `:after` - extracting 72 | ;; the string after the match, `:whole` - pass the whole string, `nil` - 73 | ;; pass `nil', or an extractor function taking the string and returning the 74 | ;; processed string) 75 | ;; 76 | ;; * What is the action that the extracted/processed string is performed upon? 77 | ;; (The `action' argument) 78 | ;; 79 | ;; * Is the current comment stripped before processing the string? (The 80 | ;; `skip-comment' argument). Comments are stripped by default. 81 | ;; 82 | ;; Here is an example of how it would look like in practice: 83 | ;; 84 | ;; (setq wand:*rules* 85 | ;; (list (wand:create-rule :match "\\$ " 86 | ;; :capture :after 87 | ;; :action #'popup-shell-command) 88 | ;; (wand:create-rule :match "https?://" 89 | ;; :capture :whole 90 | ;; :action #'open-url-in-firefox) 91 | ;; (wand:create-rule :match "file:" 92 | ;; :capture :after 93 | ;; :action #'find-file) 94 | ;; (wand:create-rule :match "#> " 95 | ;; :capture :after 96 | ;; :action #'(lambda (string) 97 | ;; (eval (read string)))))) 98 | ;; 99 | ;; When calling `wand:execute `, the following would happen: 100 | ;; 101 | ;; * If the string is `;; $ ls`, call `(popup-shell-command "ls")` 102 | ;; 103 | ;; * If the string is `http://google.com` or `https://google.com`, call 104 | ;; `(open-url-in-firefox )`. 105 | ;; 106 | ;; * If the string is `file:~/tmp/tmp.el`, call `(find-file "~/tmp/tmp/.el")`. 107 | ;; 108 | ;; * If the string is `#> (message-box "¡Hola a todos!")`, eval `(message-box 109 | ;; "¡Hola a todos!")`. 110 | ;; 111 | ;; * With any other string, the string is `eval'-ed with `wand:eval-string'. 112 | ;; This the default action for all unmatched strings. 113 | ;; 114 | ;; It's recommended to bind `wand:execute' to a key stroke and/or mouse for 115 | ;; better usage. 116 | ;; 117 | 118 | ;;; Notes and references: 119 | 120 | ;; [1] http://xiki.org/ 121 | ;; [2] http://acme.cat-v.org/ 122 | ;; [3] A window as in Emacs term 123 | ;; [4] https://github.com/magnars/dash.el 124 | ;; [5] https://github.com/magnars/s.el 125 | 126 | ;;; Code: 127 | 128 | (require 'cl) 129 | (require 'subr-x) 130 | 131 | (require 'wand-helper) 132 | 133 | (defvar wand:*rules* 134 | '() 135 | "The list of rules to for pattern-based action. 136 | Each rule is a cons of the format `\(check-fn . action-fn\)`: 137 | 138 | * `check-fn` is a one-argument function, taking a string and 139 | determining if the string satisfies the rule. 140 | 141 | * `action-fn` is a one-argument function, taking a string and 142 | execute the action based on that string if its corresponding 143 | `check-fn` returns `t'.") 144 | 145 | (defun wand:get-rule-action (string) 146 | "Determines if a string matches a predefined rule. If it does, 147 | returns the function corresponding to that rule's action; 148 | otherwise returns `nil'." 149 | (thread-last 150 | wand:*rules* 151 | (wand-helper:find (lambda (rule-pair) 152 | (let ((rule-check-fn (car rule-pair))) 153 | (funcall rule-check-fn string)))) 154 | cdr)) 155 | 156 | (defun wand:eval-string (&optional string) 157 | "Adds a pair of surrounding brackets if necessary and evals the 158 | string. If no string is passed, take the current region as the 159 | string. 160 | 161 | This function is convenient when being called interactively or 162 | quickly eval a region. 163 | 164 | E.g. 165 | 166 | \(wand:eval-string \"message \\\"¡Hola mundo!\\\"\"\) 167 | ;; => ¡Hola mundo! 168 | 169 | \(wand:eval-string \"\(message \\\"¡Hola mundo!\\\"\)\"\) 170 | ;; => ¡Hola mundo! 171 | " 172 | (interactive) 173 | (let* ((preprocessed-sexp (if (or (null string) 174 | (string-empty-p string)) 175 | (wand-helper:get-selection) 176 | string)) 177 | (sexp (cond ((and (intern-soft preprocessed-sexp) 178 | (boundp (intern-soft preprocessed-sexp))) 179 | preprocessed-sexp) 180 | ((string-prefix-p "(" (string-trim-left preprocessed-sexp)) 181 | preprocessed-sexp) 182 | (t 183 | (format "(%s)" preprocessed-sexp))))) 184 | (unless (string-empty-p (string-trim string)) 185 | (wand-helper:eval-string sexp)))) 186 | 187 | (defun* wand:create-rule (&key (skip-comment t) 188 | match 189 | capture 190 | (action wand:eval-string)) 191 | "This function provides a simplified and declarative way to 192 | create a pattern-action rule without having to construct the 193 | `\(check-fn . action-fn\)` conses manually. 194 | 195 | `wand:create-rule' takes several arguments describing the process 196 | of matching and extracting a string and the action performed upon 197 | it: 198 | 199 | * `match` is a regexp to test whether the input string (passed to 200 | `check-fn`) satisfies the current rule. The input string is 201 | checked with `string-match-p'. 202 | 203 | * `capture` determines how the input string is extracted to be 204 | passed to `action-fn`. It takes one of the following types of 205 | value: 206 | 207 | - `:whole' - means the original string is passed to `action`. 208 | 209 | - `:after' - means only substring after the match part is 210 | passed to `action`. 211 | 212 | - `nil' - means an empty string is passed to `action`. 213 | 214 | - a regular expression _with capture group_. `string-match' 215 | followed by `match-string' are called to extract the first 216 | captured group which is then is passed to `action`. 217 | 218 | - a function - that takes the original string and returns what 219 | `action` wants to process 220 | 221 | * `skip-comment` takes either `t' or `nil', determining the 222 | string is stripped of comments. The comment syntax is defined 223 | in the current major mode. 224 | 225 | * `action` is `action-fn`, a function that will be called when 226 | the input string is matched. `action` is `wand:eval-string' by 227 | default. 228 | 229 | E.g. 230 | 231 | Call `\(message-box something\)` when input string is `#> something`: 232 | 233 | \(wand:create-rule :match \"#> \" 234 | :capture :after 235 | :action message-box\) 236 | 237 | Browse a HTTP/HTTPS web page when input string is 238 | `http://some-url` or `https://some-url`: 239 | 240 | \(wand:create-rule :match \"https?://\" 241 | :capture :whole 242 | :action browse-url\) 243 | 244 | Open file when input string is `file:///path/to/your-file`: 245 | 246 | \(wand:create-rule :match \"file:///\" 247 | :capture :after 248 | :action find-file\) 249 | " 250 | (cl-labels ((rule-check-fn 251 | (str) 252 | (thread-last (wand-helper:maybe-uncomment-string str skip-comment 253 | :major-mode-fn major-mode) 254 | (string-match-p match))) 255 | (action-fn 256 | (str) 257 | (let* ((str (wand-helper:maybe-uncomment-string str skip-comment 258 | :major-mode-fn major-mode)) 259 | (processed-str 260 | (cond 261 | ((eq :after capture) 262 | (let ((prefix (progn (string-match match str) 263 | (match-string 0 str)))) 264 | (s-chop-prefix prefix str))) 265 | 266 | ((eq :whole capture) 267 | str) 268 | 269 | ((null capture) 270 | nil) 271 | 272 | ((functionp capture) 273 | (funcall capture str)) 274 | 275 | (t 276 | (error "`capture` must be :after, :whole, nil, or a function"))))) 277 | (funcall action processed-str)))) 278 | (cons (function rule-check-fn) 279 | (function action-fn)))) 280 | 281 | (defun* wand:execute (&optional (string-to-execute "")) 282 | "Executes a string based on predefined rules stored in 283 | `wand:*rules*. If no rules are found, eval the string using 284 | `wand:eval-string' function. 285 | 286 | This function could be called interactively. The string to 287 | execute is determined as follow: 288 | 289 | * If this function is called non-interactively, it's the argument 290 | that is passed to this function, 291 | 292 | * If there is currently a selection, it's the current selected 293 | text, 294 | 295 | * Otherwise, do nothing. 296 | 297 | The rules are defined in `wand:*rules*' variable. Use 298 | `wand:add-rule' or `wand:add-rule-by-pattern' to add rule, 299 | `wand:remove-rule' or `wand:remove-rule-by-pattern' to remove 300 | rule. 301 | 302 | For strings that are not matched by any rules, they're called 303 | with `wand:eval-string' by default. 304 | 305 | E.g. 306 | 307 | \(some-func \"message \\\"Hello World\\\"\"\) 308 | \(some-func \"\(message \\\"Hello World\\\"\\)\"\) 309 | ;; Both echo \"Hello World\" in echo area 310 | " 311 | (interactive) 312 | (let* ((string (if (or (null string-to-execute) 313 | (string-empty-p string-to-execute)) 314 | (wand-helper:get-selection) 315 | string-to-execute)) 316 | (action (or (wand:get-rule-action string) 317 | #'wand:eval-string))) 318 | (unless (string-empty-p (string-trim string)) 319 | (funcall action string)))) 320 | 321 | (provide 'wand) 322 | ;;; wand.el ends here 323 | --------------------------------------------------------------------------------