| 1 | ;;; -*- Log: hemlock.log; Package: Hemlock -*-
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| 2 | ;;;
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| 3 | ;;; **********************************************************************
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| 4 | ;;; This code was written as part of the CMU Common Lisp project at
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| 5 | ;;; Carnegie Mellon University, and has been placed in the public domain.
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| 6 | ;;;
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| 7 | #+CMU (ext:file-comment
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| 8 | "$Header$")
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| 9 | ;;;
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| 10 | ;;; **********************************************************************
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| 11 | ;;;
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| 12 |
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| 13 | (in-package :hemlock)
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| 14 |
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| 15 | |
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| 16 |
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| 17 | ;;;; Variables.
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| 18 |
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| 19 | (defvar *scribe-para-break-table* (make-hash-table :test #'equal)
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| 20 | "A table of the Scribe commands that should be paragraph delimiters.")
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| 21 | ;;;
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| 22 | (dolist (todo '("begin" "newpage" "make" "device" "caption" "tag" "end"
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| 23 | "chapter" "section" "appendix" "subsection" "paragraph"
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| 24 | "unnumbered" "appendixsection" "prefacesection" "heading"
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| 25 | "majorheading" "subheading"))
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| 26 | (setf (gethash todo *scribe-para-break-table*) t))
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| 27 |
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| 28 | (defhvar "Open Paren Character"
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| 29 | "The open bracket inserted by Scribe commands."
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| 30 | :value #\[)
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| 31 |
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| 32 | (defhvar "Close Paren Character"
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| 33 | "The close bracket inserted by Scribe commands."
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| 34 | :value #\])
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| 35 |
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| 36 | (defhvar "Escape Character"
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| 37 | "The escape character inserted by Scribe commands."
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| 38 | :value #\@)
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| 39 |
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| 40 | (defhvar "Scribe Bracket Table"
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| 41 | "This table maps a Scribe brackets, open and close, to their opposing
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| 42 | brackets."
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| 43 | :value (make-array char-code-limit))
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| 44 | ;;;
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| 45 | (mapc #'(lambda (x y)
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| 46 | (setf (svref (value scribe-bracket-table) (char-code x)) y)
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| 47 | (setf (svref (value scribe-bracket-table) (char-code y)) x))
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| 48 | '(#\( #\[ #\{ #\<) '(#\) #\] #\} #\>))
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| 49 | ;;;
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| 50 | (defun opposing-bracket (bracket)
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| 51 | (svref (value scribe-bracket-table) (char-code bracket)))
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| 52 |
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| 53 |
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| 54 | |
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| 55 |
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| 56 | ;;;; "Scribe Syntax" Attribute.
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| 57 |
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| 58 | (defattribute "Scribe Syntax"
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| 59 | "For Scribe Syntax, Possible types are:
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| 60 | :ESCAPE ; basically #\@.
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| 61 | :OPEN-PAREN ; Characters that open a Scribe paren: #\[, #\{, #\(, #\<.
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| 62 | :CLOSE-PAREN ; Characters that close a Scribe paren: #\], #\}, #\), #\>.
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| 63 | :SPACE ; Delimits end of a Scribe command.
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| 64 | :NEWLINE ; Delimits end of a Scribe command."
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| 65 | 'symbol nil)
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| 66 |
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| 67 | (setf (character-attribute :scribe-syntax #\)) :close-paren)
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| 68 | (setf (character-attribute :scribe-syntax #\]) :close-paren)
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| 69 | (setf (character-attribute :scribe-syntax #\}) :close-paren)
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| 70 | (setf (character-attribute :scribe-syntax #\>) :close-paren)
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| 71 |
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| 72 | (setf (character-attribute :scribe-syntax #\() :open-paren)
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| 73 | (setf (character-attribute :scribe-syntax #\[) :open-paren)
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| 74 | (setf (character-attribute :scribe-syntax #\{) :open-paren)
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| 75 | (setf (character-attribute :scribe-syntax #\<) :open-paren)
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| 76 |
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| 77 | (setf (character-attribute :scribe-syntax #\space) :space)
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| 78 | (setf (character-attribute :scribe-syntax #\newline) :newline)
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| 79 | (setf (character-attribute :scribe-syntax #\@) :escape)
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| 80 |
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| 81 |
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| 82 | |
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| 83 |
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| 84 | ;;;; "Scribe" mode and setup.
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| 85 |
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| 86 | (defmode "Scribe" :major-p t)
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| 87 |
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| 88 | (shadow-attribute :paragraph-delimiter #\@ 1 "Scribe")
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| 89 | (shadow-attribute :word-delimiter #\' 0 "Scribe") ;from Text Mode
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| 90 | (shadow-attribute :word-delimiter #\backspace 0 "Scribe") ;from Text Mode
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| 91 | (shadow-attribute :word-delimiter #\_ 0 "Scribe") ;from Text Mode
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| 92 |
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| 93 | (define-file-type-hook ("mss") (buffer type)
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| 94 | (declare (ignore type))
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| 95 | (setf (buffer-major-mode buffer) "Scribe"))
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| 96 |
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| 97 |
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| 98 | |
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| 99 |
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| 100 | ;;;; Commands.
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| 101 |
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| 102 | (defcommand "Scribe Mode" (p)
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| 103 | "Puts buffer in Scribe mode. Sets up comment variables and has delimiter
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| 104 | matching. The definition of paragraphs is changed to know about scribe
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| 105 | commands."
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| 106 | "Puts buffer in Scribe mode."
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| 107 | (declare (ignore p))
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| 108 | (setf (buffer-major-mode (current-buffer)) "Scribe"))
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| 109 |
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| 110 | (defcommand "Select Scribe Warnings" (p)
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| 111 | "Goes to the Scribe Warnings buffer if it exists."
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| 112 | "Goes to the Scribe Warnings buffer if it exists."
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| 113 | (declare (ignore p))
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| 114 | (let ((buffer (getstring "Scribe Warnings" *buffer-names*)))
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| 115 | (if buffer
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| 116 | (change-to-buffer buffer)
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| 117 | (editor-error "There is no Scribe Warnings buffer."))))
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| 118 |
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| 119 | (defcommand "Add Scribe Paragraph Delimiter"
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| 120 | (p &optional
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| 121 | (word (prompt-for-string
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| 122 | :prompt "Scribe command: "
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| 123 | :help "Name of Scribe command to make delimit paragraphs."
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| 124 | :trim t)))
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| 125 | "Prompts for a name to add to the table of commands that delimit paragraphs
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| 126 | in Scribe mode. If a prefix argument is supplied, then the command name is
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| 127 | removed from the table."
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| 128 | "Add or remove Word in the *scribe-para-break-table*, depending on P."
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| 129 | (setf (gethash word *scribe-para-break-table*) (not p)))
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| 130 |
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| 131 | (defcommand "List Scribe Paragraph Delimiters" (p)
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| 132 | "Pops up a display of the Scribe commands that delimit paragraphs."
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| 133 | "Pops up a display of the Scribe commands that delimit paragraphs."
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| 134 | (declare (ignore p))
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| 135 | (let (result)
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| 136 | (maphash #'(lambda (k v)
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| 137 | (declare (ignore v))
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| 138 | (push k result))
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| 139 | *scribe-para-break-table*)
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| 140 | (setf result (sort result #'string<))
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| 141 | (with-pop-up-display (s :height (length result))
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| 142 | (dolist (ele result) (write-line ele s)))))
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| 143 |
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| 144 | (defcommand "Scribe Insert Bracket" (p)
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| 145 | "Inserts a the bracket it is bound to and then shows the matching bracket."
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| 146 | "Inserts a the bracket it is bound to and then shows the matching bracket."
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| 147 | (declare (ignore p))
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| 148 | (scribe-insert-paren (current-point)
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| 149 | (hemlock-ext:key-event-char *last-key-event-typed*)))
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| 150 |
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| 151 |
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| 152 | (defhvar "Scribe Command Table"
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| 153 | "This is a character dispatching table indicating which Scribe command or
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| 154 | environment to use."
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| 155 | :value (make-hash-table)
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| 156 | :mode "Scribe")
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| 157 |
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| 158 | (defvar *scribe-directive-type-table*
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| 159 | (make-string-table :initial-contents
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| 160 | '(("Command" . :command)
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| 161 | ("Environment" . :environment))))
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| 162 |
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| 163 | (defcommand "Add Scribe Directive" (p &optional
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| 164 | (command-name nil command-name-p)
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| 165 | type key-event mode)
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| 166 | "Adds a new scribe function to put into \"Scribe Command Table\"."
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| 167 | "Adds a new scribe function to put into \"Scribe Command Table\"."
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| 168 | (declare (ignore p))
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| 169 | (let ((command-name (if command-name-p
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| 170 | command-name
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| 171 | (or command-name
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| 172 | (prompt-for-string :help "Directive Name"
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| 173 | :prompt "Directive: ")))))
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| 174 | (multiple-value-bind (ignore type)
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| 175 | (if type
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| 176 | (values nil type)
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| 177 | (prompt-for-keyword
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| 178 | (list *scribe-directive-type-table*)
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| 179 | :help "Enter Command or Environment."
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| 180 | :prompt "Command or Environment: "))
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| 181 | (declare (ignore ignore))
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| 182 | (let ((key-event (or key-event
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| 183 | (prompt-for-key-event :prompt
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| 184 | "Dispatch Character: "))))
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| 185 | (setf (gethash key-event
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| 186 | (cond (mode
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| 187 | (variable-value 'scribe-command-table :mode mode))
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| 188 | ((hemlock-bound-p 'scribe-command-table)
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| 189 | (value scribe-command-table))
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| 190 | (t (editor-error
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| 191 | "Could not find \"Scribe Command Table\"."))))
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| 192 | (cons type command-name))))))
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| 193 |
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| 194 | (defcommand "Insert Scribe Directive" (p)
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| 195 | "Prompts for a character to dispatch on. Some indicate \"commands\" versus
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| 196 | \"environments\". Commands are wrapped around the previous or current word.
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| 197 | If there is no previous word, the command is insert, leaving point between
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| 198 | the brackets. Environments are wrapped around the next or current
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| 199 | paragraph, but when the region is active, this wraps the environment around
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| 200 | the region. Each uses \"Open Paren Character\" and \"Close Paren
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| 201 | Character\"."
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| 202 | "Wrap some text with some stuff."
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| 203 | (declare (ignore p))
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| 204 | (loop
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| 205 | (let ((key-event (prompt-for-key-event :prompt "Dispatch Character: ")))
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| 206 | (if (logical-key-event-p key-event :help)
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| 207 | (directive-help)
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| 208 | (let ((table-entry (gethash key-event (value scribe-command-table))))
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| 209 | (ecase (car table-entry)
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| 210 | (:command
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| 211 | (insert-scribe-directive (current-point) (cdr table-entry))
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| 212 | (return))
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| 213 | (:environment
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| 214 | (enclose-with-environment (current-point) (cdr table-entry))
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| 215 | (return))
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| 216 | ((nil) (editor-error "Unknown dispatch character."))))))))
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| 217 |
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| 218 |
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| 219 | |
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| 220 |
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| 221 | ;;;; "Insert Scribe Directive" support.
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| 222 |
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| 223 | (defun directive-help ()
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| 224 | (let ((commands ())
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| 225 | (environments ()))
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| 226 | (declare (list commands environments))
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| 227 | (maphash #'(lambda (k v)
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| 228 | (if (eql (car v) :command)
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| 229 | (push (cons k (cdr v)) commands)
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| 230 | (push (cons k (cdr v)) environments)))
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| 231 | (value scribe-command-table))
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| 232 | (setf commands (sort commands #'string< :key #'cdr))
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| 233 | (setf environments (sort environments #'string< :key #'cdr))
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| 234 | (with-pop-up-display (s :height (1+ (max (length commands)
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| 235 | (length environments))))
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| 236 | (format s "~2TCommands~47TEnvironments~%")
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| 237 | (do ((commands commands (rest commands))
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| 238 | (environments environments (rest environments)))
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| 239 | ((and (endp commands) (endp environments)))
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| 240 | (let* ((command (first commands))
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| 241 | (environment (first environments))
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| 242 | (cmd-char (first command))
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| 243 | (cmd-name (rest command))
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| 244 | (env-char (first environment))
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| 245 | (env-name (rest environment)))
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| 246 | (write-string " " s)
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| 247 | (when cmd-char
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| 248 | (hemlock-ext:print-pretty-key-event cmd-char s)
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| 249 | (format s "~7T")
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| 250 | (write-string (or cmd-name "<prompts for command name>") s))
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| 251 | (when env-char
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| 252 | (format s "~47T")
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| 253 | (hemlock-ext:print-pretty-key-event env-char s)
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| 254 | (format s "~51T")
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| 255 | (write-string (or env-name "<prompts for command name>") s))
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| 256 | (terpri s))))))
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| 257 |
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| 258 | ;;;
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| 259 | ;;; Inserting and extending :command directives.
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| 260 | ;;;
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| 261 |
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| 262 | (defhvar "Insert Scribe Directive Function"
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| 263 | "\"Insert Scribe Directive\" calls this function when the directive type
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| 264 | is :command. The function takes four arguments: a mark pointing to the word
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| 265 | start, the formatting command string, the open-paren character to use, and a
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| 266 | mark pointing to the word end."
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| 267 | :value 'scribe-insert-scribe-directive-fun
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| 268 | :mode "Scribe")
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| 269 |
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| 270 | (defun scribe-insert-scribe-directive-fun (word-start command-string
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| 271 | open-paren-char word-end)
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| 272 | (insert-character word-start (value escape-character))
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| 273 | (insert-string word-start command-string)
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| 274 | (insert-character word-start open-paren-char)
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| 275 | (insert-character word-end (value close-paren-character)))
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| 276 |
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| 277 | (defhvar "Extend Scribe Directive Function"
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| 278 | "\"Insert Scribe Directive\" calls this function when the directive type is
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| 279 | :command to extend the the commands effect. This function takes a string
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| 280 | and three marks: the first on pointing before the open-paren character for
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| 281 | the directive. The string is the command-string to selected by the user
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| 282 | which this function uses to determine if it is actually extending a command
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| 283 | or inserting a new one. The function must move the first mark before any
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| 284 | command text for the directive and the second mark to the end of any command
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| 285 | text. It moves the third mark to the previous word's start where the
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| 286 | command region should be. If this returns non-nil \"Insert Scribe
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| 287 | Directive\" moves the command region previous one word, and otherwise it
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| 288 | inserts the directive."
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| 289 | :value 'scribe-extend-scribe-directive-fun
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| 290 | :mode "Scribe")
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| 291 |
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| 292 | (defun scribe-extend-scribe-directive-fun (command-string
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| 293 | command-end command-start word-start)
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| 294 | (word-offset (move-mark command-start command-end) -1)
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| 295 | (when (string= (the simple-string (region-to-string
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| 296 | (region command-start command-end)))
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| 297 | command-string)
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| 298 | (mark-before command-start)
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| 299 | (mark-after command-end)
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| 300 | (word-offset (move-mark word-start command-start) -1)))
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| 301 |
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| 302 | ;;; INSERT-SCRIBE-DIRECTIVE first looks for the current or previous word at
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| 303 | ;;; mark. Word-p says if we found one. If mark is immediately before a word,
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| 304 | ;;; we use that word instead of the previous. This is because if mark
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| 305 | ;;; corresponds to the CURRENT-POINT, the Hemlock cursor is displayed on the
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| 306 | ;;; first character of the word making users think the mark is in the word
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| 307 | ;;; instead of before it. If we find a word, then we see if it already has
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| 308 | ;;; the given command-string, and if it does, we extend the use of the command-
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| 309 | ;;; string to the previous word. At the end, if we hadn't found a word, we
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| 310 | ;;; backup the mark one character to put it between the command brackets.
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| 311 | ;;;
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| 312 | (defun insert-scribe-directive (mark &optional command-string)
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| 313 | (with-mark ((word-start mark :left-inserting)
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| 314 | (word-end mark :left-inserting))
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| 315 | (let ((open-paren-char (value open-paren-character))
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| 316 | (word-p (if (and (zerop (character-attribute
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| 317 | :word-delimiter
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| 318 | (next-character word-start)))
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| 319 | (= (character-attribute
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| 320 | :word-delimiter
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| 321 | (previous-character word-start))
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| 322 | 1))
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| 323 | word-start
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| 324 | (word-offset word-start -1)))
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| 325 | (command-string (or command-string
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| 326 | (prompt-for-string
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| 327 | :trim t :prompt "Environment: "
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| 328 | :help "Name of environment to enclose with."))))
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| 329 | (declare (simple-string command-string))
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| 330 | (cond
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| 331 | (word-p
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| 332 | (word-offset (move-mark word-end word-start) 1)
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| 333 | (if (test-char (next-character word-end) :scribe-syntax
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| 334 | :close-paren)
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| 335 | (with-mark ((command-start word-start :left-inserting)
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| 336 | (command-end word-end :left-inserting))
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| 337 | ;; Move command-end from word-end to open-paren of command.
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| 338 | (balance-paren (mark-after command-end))
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| 339 | (if (funcall (value extend-scribe-directive-function)
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| 340 | command-string command-end command-start word-start)
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| 341 | (let ((region (delete-and-save-region
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| 342 | (region command-start command-end))))
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| 343 | (word-offset (move-mark word-start command-start) -1)
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| 344 | (ninsert-region word-start region))
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| 345 | (funcall (value insert-scribe-directive-function)
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| 346 | word-start command-string open-paren-char
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| 347 | word-end)))
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| 348 | (funcall (value insert-scribe-directive-function)
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| 349 | word-start command-string open-paren-char word-end)))
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| 350 | (t
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| 351 | (funcall (value insert-scribe-directive-function)
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| 352 | word-start command-string open-paren-char word-end)
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| 353 | (mark-before mark))))))
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| 354 |
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| 355 | ;;;
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| 356 | ;;; Inserting :environment directives.
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| 357 | ;;;
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| 358 |
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| 359 | (defun enclose-with-environment (mark &optional environment)
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| 360 | (if (region-active-p)
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| 361 | (let ((region (current-region)))
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| 362 | (with-mark ((top (region-start region) :left-inserting)
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| 363 | (bottom (region-end region) :left-inserting))
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| 364 | (get-and-insert-environment top bottom environment)))
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| 365 | (with-mark ((bottom-mark mark :left-inserting))
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| 366 | (let ((paragraphp (paragraph-offset bottom-mark 1)))
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| 367 | (unless (or paragraphp
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| 368 | (and (last-line-p bottom-mark)
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| 369 | (end-line-p bottom-mark)
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| 370 | (not (blank-line-p (mark-line bottom-mark)))))
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| 371 | (editor-error "No paragraph to enclose."))
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| 372 | (with-mark ((top-mark bottom-mark :left-inserting))
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| 373 | (paragraph-offset top-mark -1)
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| 374 | (cond ((not (blank-line-p (mark-line top-mark)))
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| 375 | (insert-character top-mark #\Newline)
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| 376 | (mark-before top-mark))
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| 377 | (t
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| 378 | (insert-character top-mark #\Newline)))
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| 379 | (cond ((and (last-line-p bottom-mark)
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| 380 | (not (blank-line-p (mark-line bottom-mark))))
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| 381 | (insert-character bottom-mark #\Newline))
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| 382 | (t
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| 383 | (insert-character bottom-mark #\Newline)
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| 384 | (mark-before bottom-mark)))
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| 385 | (get-and-insert-environment top-mark bottom-mark environment))))))
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| 386 |
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| 387 | (defun get-and-insert-environment (top-mark bottom-mark environment)
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| 388 | (let ((environment (or environment
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| 389 | (prompt-for-string
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| 390 | :trim t :prompt "Environment: "
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| 391 | :help "Name of environment to enclose with."))))
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| 392 | (insert-environment top-mark "begin" environment)
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| 393 | (insert-environment bottom-mark "end" environment)))
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| 394 |
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| 395 | (defun insert-environment (mark command environment)
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| 396 | (let ((esc-char (value escape-character))
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| 397 | (open-paren (value open-paren-character))
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| 398 | (close-paren (value close-paren-character)))
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| 399 | (insert-character mark esc-char)
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| 400 | (insert-string mark command)
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| 401 | (insert-character mark open-paren)
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| 402 | (insert-string mark environment)
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| 403 | (insert-character mark close-paren)))
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| 404 |
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| 405 |
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| 406 | (add-scribe-directive-command nil nil :Environment #k"Control-l" "Scribe")
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| 407 | (add-scribe-directive-command nil nil :Command #k"Control-w" "Scribe")
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| 408 | (add-scribe-directive-command nil "Begin" :Command #k"b" "Scribe")
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| 409 | (add-scribe-directive-command nil "End" :Command #k"e" "Scribe")
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| 410 | (add-scribe-directive-command nil "Center" :Environment #k"c" "Scribe")
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| 411 | (add-scribe-directive-command nil "Description" :Environment #k"d" "Scribe")
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| 412 | (add-scribe-directive-command nil "Display" :Environment #k"Control-d" "Scribe")
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| 413 | (add-scribe-directive-command nil "Enumerate" :Environment #k"n" "Scribe")
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| 414 | (add-scribe-directive-command nil "Example" :Environment #k"x" "Scribe")
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| 415 | (add-scribe-directive-command nil "FileExample" :Environment #k"y" "Scribe")
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| 416 | (add-scribe-directive-command nil "FlushLeft" :Environment #k"l" "Scribe")
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| 417 | (add-scribe-directive-command nil "FlushRight" :Environment #k"r" "Scribe")
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| 418 | (add-scribe-directive-command nil "Format" :Environment #k"f" "Scribe")
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| 419 | (add-scribe-directive-command nil "Group" :Environment #k"g" "Scribe")
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| 420 | (add-scribe-directive-command nil "Itemize" :Environment #k"Control-i" "Scribe")
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| 421 | (add-scribe-directive-command nil "Multiple" :Environment #k"m" "Scribe")
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| 422 | (add-scribe-directive-command nil "ProgramExample" :Environment #k"p" "Scribe")
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| 423 | (add-scribe-directive-command nil "Quotation" :Environment #k"q" "Scribe")
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| 424 | (add-scribe-directive-command nil "Text" :Environment #k"t" "Scribe")
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| 425 | (add-scribe-directive-command nil "i" :Command #k"i" "Scribe")
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| 426 | (add-scribe-directive-command nil "b" :Command #k"Control-b" "Scribe")
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| 427 | (add-scribe-directive-command nil "-" :Command #k"\-" "Scribe")
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| 428 | (add-scribe-directive-command nil "+" :Command #k"+" "Scribe")
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| 429 | (add-scribe-directive-command nil "u" :Command #k"Control-j" "Scribe")
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| 430 | (add-scribe-directive-command nil "p" :Command #k"Control-p" "Scribe")
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| 431 | (add-scribe-directive-command nil "r" :Command #k"Control-r" "Scribe")
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| 432 | (add-scribe-directive-command nil "t" :Command #k"Control-t" "Scribe")
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| 433 | (add-scribe-directive-command nil "g" :Command #k"Control-a" "Scribe")
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| 434 | (add-scribe-directive-command nil "un" :Command #k"Control-n" "Scribe")
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| 435 | (add-scribe-directive-command nil "ux" :Command #k"Control-x" "Scribe")
|
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| 436 | (add-scribe-directive-command nil "c" :Command #k"Control-k" "Scribe")
|
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| 437 |
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| 438 |
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| 439 | |
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| 440 |
|
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| 441 | ;;;; Scribe paragraph delimiter function.
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| 442 |
|
|---|
| 443 | (defhvar "Paragraph Delimiter Function"
|
|---|
| 444 | "Scribe Mode's way of delimiting paragraphs."
|
|---|
| 445 | :mode "Scribe"
|
|---|
| 446 | :value 'scribe-delim-para-function)
|
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| 447 |
|
|---|
| 448 | (defun scribe-delim-para-function (mark)
|
|---|
| 449 | "Returns whether there is a paragraph delimiting Scribe command on the
|
|---|
| 450 | current line. Add or remove commands for this purpose with the command
|
|---|
| 451 | \"Add Scribe Paragraph Delimiter\"."
|
|---|
| 452 | (let ((next-char (next-character mark)))
|
|---|
| 453 | (when (paragraph-delimiter-attribute-p next-char)
|
|---|
| 454 | (if (eq (character-attribute :scribe-syntax next-char) :escape)
|
|---|
| 455 | (with-mark ((begin mark)
|
|---|
| 456 | (end mark))
|
|---|
| 457 | (mark-after begin)
|
|---|
| 458 | (if (scan-char end :scribe-syntax (or :space :newline :open-paren))
|
|---|
| 459 | (gethash (nstring-downcase (region-to-string (region begin end)))
|
|---|
| 460 | *scribe-para-break-table*)
|
|---|
| 461 | (editor-error "Unable to find Scribe command ending.")))
|
|---|
| 462 | t))))
|
|---|
| 463 |
|
|---|
| 464 |
|
|---|
| 465 | |
|---|
| 466 |
|
|---|
| 467 | ;;;; Bracket matching.
|
|---|
| 468 |
|
|---|
| 469 | (defun scribe-insert-paren (mark bracket-char)
|
|---|
| 470 | (insert-character mark bracket-char)
|
|---|
| 471 | (with-mark ((m mark))
|
|---|
| 472 | (if (balance-paren m)
|
|---|
| 473 | (when (value paren-pause-period)
|
|---|
| 474 | (unless (show-mark m (current-window) (value paren-pause-period))
|
|---|
| 475 | (clear-echo-area)
|
|---|
| 476 | (message "~A" (line-string (mark-line m)))))
|
|---|
| 477 | (editor-error))))
|
|---|
| 478 |
|
|---|
| 479 | ;;; BALANCE-PAREN moves the mark to the matching open paren character, or
|
|---|
| 480 | ;;; returns nil. The mark must be after the closing paren.
|
|---|
| 481 | ;;;
|
|---|
| 482 | (defun balance-paren (mark)
|
|---|
| 483 | (with-mark ((m mark))
|
|---|
| 484 | (when (rev-scan-char m :scribe-syntax (or :open-paren :close-paren))
|
|---|
| 485 | (mark-before m)
|
|---|
| 486 | (let ((paren-count 1)
|
|---|
| 487 | (first-paren (next-character m)))
|
|---|
| 488 | (loop
|
|---|
| 489 | (unless (rev-scan-char m :scribe-syntax (or :open-paren :close-paren))
|
|---|
| 490 | (return nil))
|
|---|
| 491 | (if (test-char (previous-character m) :scribe-syntax :open-paren)
|
|---|
| 492 | (setq paren-count (1- paren-count))
|
|---|
| 493 | (setq paren-count (1+ paren-count)))
|
|---|
| 494 | (when (< paren-count 0) (return nil))
|
|---|
| 495 | (when (= paren-count 0)
|
|---|
| 496 | ;; OPPOSING-BRACKET calls VALUE (each time around the loop)
|
|---|
| 497 | (cond ((char= (opposing-bracket (previous-character m)) first-paren)
|
|---|
| 498 | (mark-before (move-mark mark m))
|
|---|
| 499 | (return t))
|
|---|
| 500 | (t (editor-error "Scribe paren mismatch."))))
|
|---|
| 501 | (mark-before m))))))
|
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