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99 lines
3.5 KiB
EmacsLisp
99 lines
3.5 KiB
EmacsLisp
;;; cap-words.el --- minor mode for motion in CapitalizedWordIdentifiers
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;; Copyright (C) 2002-2013 Free Software Foundation, Inc.
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;; Author: Dave Love <fx@gnu.org>
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;; Keywords: languages
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Provides Capitalized Words minor mode for word movement in
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;; identifiers CapitalizedLikeThis.
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;; Note that the same effect could be obtained by frobbing the
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;; category of upper case characters to produce word boundaries, but
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;; the necessary processing isn't done for ASCII characters.
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;; Fixme: This doesn't work properly for mouse double clicks.
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;;; Code:
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(defun capitalized-find-word-boundary (pos limit)
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"Function for use in `find-word-boundary-function-table'.
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Looks for word boundaries before capitals."
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(save-excursion
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(goto-char pos)
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(let (case-fold-search)
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(if (<= pos limit)
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;; Fixme: Are these regexps the best?
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(or (and (re-search-forward "\\=.\\w*[[:upper:]]"
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limit t)
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(progn (backward-char)
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t))
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(re-search-forward "\\>" limit t))
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(or (re-search-backward "[[:upper:]]\\w*\\=" limit t)
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(re-search-backward "\\<" limit t))))
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(point)))
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(defconst capitalized-find-word-boundary-function-table
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(let ((tab (make-char-table nil)))
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(set-char-table-range tab t #'capitalized-find-word-boundary)
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tab)
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"Assigned to `find-word-boundary-function-table' in Capitalized Words mode.")
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;;;###autoload
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(define-minor-mode capitalized-words-mode
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"Toggle Capitalized Words mode.
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With a prefix argument ARG, enable Capitalized Words mode if ARG
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is positive, and disable it otherwise. If called from Lisp,
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enable the mode if ARG is omitted or nil.
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Capitalized Words mode is a buffer-local minor mode. When
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enabled, a word boundary occurs immediately before an uppercase
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letter in a symbol. This is in addition to all the normal
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boundaries given by the syntax and category tables. There is no
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restriction to ASCII.
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E.g. the beginning of words in the following identifier are as marked:
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capitalizedWorDD
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^ ^ ^^
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Note that these word boundaries only apply for word motion and
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marking commands such as \\[forward-word]. This mode does not affect word
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boundaries found by regexp matching (`\\>', `\\w' &c).
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This style of identifiers is common in environments like Java ones,
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where underscores aren't trendy enough. Capitalization rules are
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sometimes part of the language, e.g. Haskell, which may thus encourage
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such a style. It is appropriate to add `capitalized-words-mode' to
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the mode hook for programming language modes in which you encounter
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variables like this, e.g. `java-mode-hook'. It's unlikely to cause
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trouble if such identifiers aren't used.
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See also `glasses-mode' and `studlify-word'.
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Obsoletes `c-forward-into-nomenclature'."
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nil " Caps" nil :group 'programming
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(set (make-local-variable 'find-word-boundary-function-table)
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capitalized-find-word-boundary-function-table))
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(provide 'cap-words)
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;;; cap-words.el ends here
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