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588 lines
22 KiB
EmacsLisp
588 lines
22 KiB
EmacsLisp
;;; viper-mous.el --- mouse support for Viper -*- lexical-binding: t; -*-
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;; Copyright (C) 1994-1997, 2001-2023 Free Software Foundation, Inc.
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;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
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;; Package: viper
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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 <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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;; compiler pacifier
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(defvar double-click-time)
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(defvar viper-search-start-marker)
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(defvar viper-local-search-start-marker)
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(defvar viper-search-history)
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(defvar viper-s-string)
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(defvar viper-re-search)
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(require 'viper-util)
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;; end pacifier
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(defgroup viper-mouse nil
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"Support for Viper special mouse-bound commands."
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:prefix "viper-"
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:group 'viper)
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;;; Variables
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;; Variable used for catching the switch-frame event.
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;; If non-nil, indicates that previous-frame should be the selected
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;; one. Used by viper-mouse-click-get-word. Not a user option.
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(defvar viper-frame-of-focus nil)
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;; Frame that was selected before the switch-frame event.
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(defvar viper-current-frame-saved (selected-frame))
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(defcustom viper-surrounding-word-function 'viper-surrounding-word
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"Function that determines what constitutes a word for clicking events.
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Takes two parameters: a COUNT, indicating how many words to return,
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and CLICK-COUNT, telling whether this is the first click, a double-click,
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or a triple-click."
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:type 'symbol)
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;; time interval in millisecond within which successive clicks are
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;; considered related
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(defcustom viper-multiclick-timeout (if (viper-window-display-p)
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(mouse-double-click-time)
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500)
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"Time interval in milliseconds for mouse clicks to be considered related."
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:type 'integer)
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;; Local variable used to toggle wraparound search on click.
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(defvar-local viper-mouse-click-search-noerror t)
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;; Local variable used to delimit search after wraparound.
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(defvar-local viper-mouse-click-search-limit nil)
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;; remembers prefix argument to pass along to commands invoked by second
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;; click.
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;; This is needed because assigning to prefix-arg causes Emacs to
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;; count the second click as if it was a single click
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(defvar viper-global-prefix-argument nil)
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;; same keys, but parsed
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(defvar viper-mouse-up-search-key-parsed nil)
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(defvar viper-mouse-down-search-key-parsed nil)
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(defvar viper-mouse-up-insert-key-parsed nil)
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(defvar viper-mouse-down-insert-key-parsed nil)
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;;; Code
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(defsubst viper-multiclick-p ()
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(not (sit-for (/ viper-multiclick-timeout 1000.0) t)))
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;; Returns window where click occurs
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(defun viper-mouse-click-window (click)
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(let ((win (posn-window (event-start click))))
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(if (window-live-p win)
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win
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(error "Click was not over a live window"))))
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;; Returns window where click occurs
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(defsubst viper-mouse-click-frame (click)
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(window-frame (viper-mouse-click-window click)))
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;; Returns the buffer of the window where click occurs
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(defsubst viper-mouse-click-window-buffer (click)
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(window-buffer (viper-mouse-click-window click)))
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;; Returns the name of the buffer in the window where click occurs
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(defsubst viper-mouse-click-window-buffer-name (click)
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(buffer-name (viper-mouse-click-window-buffer click)))
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(defsubst viper-mouse-click-posn (click)
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"Return position of a click."
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(declare (obsolete nil "27.1"))
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(posn-point (event-start click)))
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(declare-function viper-backward-char-carefully "viper-cmd" (&optional arg))
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(declare-function viper-forward-char-carefully "viper-cmd" (&optional arg))
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(defun viper-surrounding-word (count click-count)
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"Return word surrounding point according to a heuristic.
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COUNT indicates how many regions to return.
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If CLICK-COUNT is 1, `word' is a word in Vi sense.
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If CLICK-COUNT is 2,then `word' is a Word in Vi sense.
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If the character clicked on is a non-separator and is non-alphanumeric but
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is adjacent to an alphanumeric symbol, then it is considered alphanumeric
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for the purpose of this command. If this character has a matching
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character, such as `(' is a match for `)', then the matching character is
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also considered alphanumeric.
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For convenience, in Lisp modes, `-' is considered alphanumeric.
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If CLICK-COUNT is 3 or more, returns the line clicked on with leading and
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trailing space and tabs removed. In that case, the first argument, COUNT,
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is ignored."
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(let ((modifiers "_")
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beg skip-flag result
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word-beg)
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(if (> click-count 2)
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(save-excursion
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(beginning-of-line)
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(viper-skip-all-separators-forward 'within-line)
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(setq beg (point))
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(end-of-line)
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(setq result (buffer-substring beg (point))))
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(if (and (not (viper-looking-at-alphasep))
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(or (save-excursion (viper-backward-char-carefully)
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(viper-looking-at-alpha))
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(save-excursion (viper-forward-char-carefully)
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(viper-looking-at-alpha))))
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(setq modifiers
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(concat modifiers
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(cond ((looking-at "\\\\") "\\\\")
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((looking-at "-") "C-C-")
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((looking-at "[][]") "][")
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((looking-at "[()]") ")(")
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((looking-at "[{}]") "{}")
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((looking-at "[<>]") "<>")
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((looking-at "[`']") "`'")
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((looking-at "\\^") "\\^")
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((viper-looking-at-separator) "")
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(t (char-to-string (following-char))))
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)
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))
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;; Add `-' to alphanum, if it wasn't added and if we are in Lisp
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(or (looking-at "-")
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(not (string-match "lisp" (symbol-name major-mode)))
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(setq modifiers (concat modifiers "C-C-")))
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(save-excursion
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(cond ((> click-count 1) (viper-skip-nonseparators 'backward))
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((viper-looking-at-alpha modifiers)
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(viper-skip-alpha-backward modifiers))
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((not (viper-looking-at-alphasep modifiers))
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(viper-skip-nonalphasep-backward))
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(t (if (> click-count 1)
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(viper-skip-nonseparators 'backward)
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(viper-skip-alpha-backward modifiers))))
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(setq word-beg (point))
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(setq skip-flag nil) ; don't move 1 char forw the first time
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(while (> count 0)
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(if skip-flag (viper-forward-char-carefully 1))
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(setq skip-flag t) ; now always move 1 char forward
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(if (> click-count 1)
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(viper-skip-nonseparators 'forward)
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(viper-skip-alpha-forward modifiers))
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(setq count (1- count)))
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(setq result (buffer-substring word-beg (point))))
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) ; if
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;; FIXME: Use `buffer-substring-no-properties' above instead?
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(set-text-properties 0 (length result) nil result)
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result))
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(defun viper-mouse-click-get-word (click count click-count)
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"Return word surrounding the position of a mouse click.
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Click may be in another window. Current window and buffer isn't changed.
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On single or double click, returns the word as determined by
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`viper-surrounding-word-function'."
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(let ((click-word "")
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(click-pos (posn-point (event-start click)))
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(click-buf (viper-mouse-click-window-buffer click)))
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(or (natnump count) (setq count 1))
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(or (natnump click-count) (setq click-count 1))
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(save-excursion
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(save-window-excursion
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(if click-pos
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(progn
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(set-buffer click-buf)
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(goto-char click-pos)
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(setq click-word
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(funcall viper-surrounding-word-function count click-count)))
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(error "Click must be over a window"))
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click-word))))
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(defun viper-mouse-click-insert-word (click arg)
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"Insert word clicked or double-clicked on.
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With prefix argument, N, insert that many words.
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This command must be bound to a mouse click.
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The double-click action of the same mouse button must not be bound
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\(or it must be bound to the same function).
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See `viper-surrounding-word' for the definition of a word in this case."
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(interactive "e\nP")
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(if viper-frame-of-focus ;; to handle clicks in another frame
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(select-frame viper-frame-of-focus))
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(if (save-excursion
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(or (not (eq (key-binding viper-mouse-down-insert-key-parsed)
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'viper-mouse-catch-frame-switch))
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(not (eq (key-binding viper-mouse-up-insert-key-parsed)
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'viper-mouse-click-insert-word))))
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() ; do nothing, if binding isn't right or not over text
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;; turn arg into a number
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(cond ((integerp arg) nil)
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;; prefix arg is a list when one hits C-u then command
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((and (listp arg) (integerp (car arg)))
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(setq arg (car arg)))
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(t (setq arg 1)))
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(if (not (eq (key-binding viper-mouse-down-insert-key-parsed)
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'viper-mouse-catch-frame-switch))
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() ; do nothing
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(let (click-count interrupting-event)
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(if (and
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(viper-multiclick-p)
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;; This trick checks if there is a pending mouse event if so, we
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;; use this latter event and discard the current mouse click If
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;; the next pending event is not a mouse event, we execute the
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;; current mouse event
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(progn
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(setq interrupting-event (read-event))
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(viper-mouse-event-p last-input-event)))
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(progn ; interrupted wait
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(setq viper-global-prefix-argument arg))
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;; uninterrupted wait or the interrupting event wasn't a mouse event
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(setq click-count (event-click-count click))
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(if (> click-count 1)
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(setq arg viper-global-prefix-argument
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viper-global-prefix-argument nil))
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(insert (viper-mouse-click-get-word click arg click-count))
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(if (and interrupting-event
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(eventp interrupting-event)
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(not (viper-mouse-event-p interrupting-event)))
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(viper-set-unread-command-events interrupting-event))
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)))))
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;; Arg is an event. Accepts symbols and numbers, too
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(defun viper-mouse-event-p (event)
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(if (eventp event)
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(string-match "\\(mouse-\\|frame\\|screen\\|track\\)"
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(prin1-to-string (viper-event-key event)))))
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(define-obsolete-function-alias 'viper-event-click-count
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#'event-click-count "28.1")
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(declare-function viper-forward-word "viper-cmd" (arg))
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(declare-function viper-adjust-window "viper-cmd" ())
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(defun viper-mouse-click-search-word (click arg)
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"Find the word clicked or double-clicked on. Word may be in another window.
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With prefix argument, N, search for N-th occurrence.
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This command must be bound to a mouse click. The double-click action of the
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same button must not be bound \(or it must be bound to the same function).
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See `viper-surrounding-word' for the details on what constitutes a word for
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this command.
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\n(fn CLICK N)"
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(interactive "e\nP")
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(if viper-frame-of-focus ;; to handle clicks in another frame
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(select-frame viper-frame-of-focus))
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(if (save-excursion
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(or (not (eq (key-binding viper-mouse-down-search-key-parsed)
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'viper-mouse-catch-frame-switch))
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(not (eq (key-binding viper-mouse-up-search-key-parsed)
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'viper-mouse-click-search-word))))
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() ; do nothing, if binding isn't right or not over text
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(let ((previous-search-string viper-s-string)
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click-word click-count)
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(if (and
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(viper-multiclick-p)
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;; This trick checks if there is a pending mouse event if so, we use
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;; this latter event and discard the current mouse click If the next
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;; pending event is not a mouse event, we execute the current mouse
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;; event
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(progn
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(read-event)
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(viper-mouse-event-p last-input-event)))
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(progn ; interrupted wait
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(setq viper-global-prefix-argument (or viper-global-prefix-argument
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arg)
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;; remember command that was before the multiclick
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this-command last-command))
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;; uninterrupted wait
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(setq click-count (event-click-count click))
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(setq click-word (viper-mouse-click-get-word click nil click-count))
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(if (> click-count 1)
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(setq arg viper-global-prefix-argument
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viper-global-prefix-argument nil))
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(setq arg (or arg 1))
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(deactivate-mark)
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(if (or (not (string= click-word viper-s-string))
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(not (markerp viper-search-start-marker))
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(not (equal (marker-buffer viper-search-start-marker)
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(current-buffer)))
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(not (eq last-command 'viper-mouse-click-search-word)))
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(progn
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(setq viper-search-start-marker (point-marker)
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viper-local-search-start-marker viper-search-start-marker
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viper-mouse-click-search-noerror t
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viper-mouse-click-search-limit nil)
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;; make search string known to Viper
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(setq viper-s-string (if viper-re-search
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(regexp-quote click-word)
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click-word))
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(if (not (string= viper-s-string (car viper-search-history)))
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(setq viper-search-history
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(cons viper-s-string viper-search-history)))
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))
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(push-mark nil t)
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(while (> arg 0)
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(viper-forward-word 1)
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(condition-case nil
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(progn
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(if (not (search-forward
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click-word viper-mouse-click-search-limit
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viper-mouse-click-search-noerror))
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(progn
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(setq viper-mouse-click-search-noerror nil)
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(setq viper-mouse-click-search-limit
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(save-excursion
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(if (and
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(markerp viper-local-search-start-marker)
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(marker-buffer viper-local-search-start-marker))
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(goto-char viper-local-search-start-marker))
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(viper-line-pos 'end)))
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(goto-char (point-min))
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(search-forward click-word
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viper-mouse-click-search-limit nil)))
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(goto-char (match-beginning 0))
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(message "Searching for: %s" viper-s-string)
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(if (<= arg 1) ; found the right occurrence of the pattern
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(progn
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(viper-adjust-window)
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(viper-flash-search-pattern)))
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)
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(error (beep 1)
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(if (or (not (string= click-word previous-search-string))
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(not (eq last-command 'viper-mouse-click-search-word)))
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(message "`%s': String not found in %s"
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viper-s-string (buffer-name (current-buffer)))
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(message
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"`%s': Last occurrence in %s. Back to beginning of search"
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click-word (buffer-name (current-buffer)))
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(setq arg 1) ;; to terminate the loop
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(sit-for 2))
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(setq viper-mouse-click-search-noerror t)
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(setq viper-mouse-click-search-limit nil)
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(if (and (markerp viper-local-search-start-marker)
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(marker-buffer viper-local-search-start-marker))
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(goto-char viper-local-search-start-marker))))
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(setq arg (1- arg)))
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))))
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(defun viper-mouse-catch-frame-switch (_event arg)
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"Catch the event of switching frame.
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Usually is bound to a `down-mouse' event to work properly. See sample
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bindings in the Viper manual."
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(interactive "e\nP")
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(setq viper-frame-of-focus nil)
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;; pass prefix arg along to viper-mouse-click-search/insert-word
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(setq prefix-arg arg)
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(if (eq last-command 'handle-switch-frame)
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(setq viper-frame-of-focus viper-current-frame-saved))
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;; make Emacs forget that it executed viper-mouse-catch-frame-switch
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(setq this-command last-command))
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;; Called just before switching frames. Saves the old selected frame.
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;; Sets last-command to handle-switch-frame (this is done automatically in
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;; Emacs.
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;; The semantics of switching frames is different in Emacs and XEmacs.
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;; In Emacs, if you select-frame A while mouse is over frame B and then
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;; start typing, input goes to frame B, which becomes selected.
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;; In XEmacs, input will go to frame A. This may be a bug in one of the
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;; Emacsen, but also may be a design decision.
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;; Also, in Emacs sending input to frame B generates handle-switch-frame
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;; event, while in XEmacs it doesn't.
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;; All this accounts for the difference in the behavior of
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;; viper-mouse-click-* commands when you click in a frame other than the one
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;; that was the last to receive input. In Emacs, focus will be in frame A
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;; until you do something other than viper-mouse-click-* command.
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;; In XEmacs, you have to manually select frame B (with the mouse click) in
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;; order to shift focus to frame B.
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(defun viper-remember-current-frame (&rest _)
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"Remember the selected frame before the switch-frame event."
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(setq last-command #'handle-switch-frame
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viper-current-frame-saved (selected-frame)))
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;; The key is of the form (MODIFIER ... BUTTON-NUMBER)
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;; Converts into a valid mouse button spec for the appropriate version of
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;; Emacs. EVENT-TYPE is either `up' or `down'. Up returns button-up key; down
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;; returns button-down key.
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(defun viper-parse-mouse-key (key-var event-type)
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(let ((key (symbol-value key-var))
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button-spec meta-spec shift-spec control-spec)
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(if (null key)
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;; just return nil
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()
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(setq button-spec
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(cond ((memq 1 key)
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(if (eq 'up event-type)
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"mouse-1" "down-mouse-1"))
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((memq 2 key)
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(if (eq 'up event-type)
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"mouse-2" "down-mouse-2"))
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||
((memq 3 key)
|
||
(if (eq 'up event-type)
|
||
"mouse-3" "down-mouse-3"))
|
||
(t (error
|
||
"%S: invalid button number, %S" key-var key)))
|
||
meta-spec
|
||
(if (memq 'meta key) "M-" "")
|
||
shift-spec
|
||
(if (memq 'shift key) "S-" "")
|
||
control-spec
|
||
(if (memq 'control key) "C-" ""))
|
||
|
||
(vector
|
||
(intern (concat control-spec meta-spec
|
||
shift-spec button-spec))))))
|
||
|
||
(defun viper-unbind-mouse-search-key ()
|
||
(if viper-mouse-up-search-key-parsed
|
||
(global-unset-key viper-mouse-up-search-key-parsed))
|
||
(if viper-mouse-down-search-key-parsed
|
||
(global-unset-key viper-mouse-down-search-key-parsed))
|
||
(setq viper-mouse-up-search-key-parsed nil
|
||
viper-mouse-down-search-key-parsed nil))
|
||
|
||
(defun viper-unbind-mouse-insert-key ()
|
||
(if viper-mouse-up-insert-key-parsed
|
||
(global-unset-key viper-mouse-up-insert-key-parsed))
|
||
(if viper-mouse-down-insert-key-parsed
|
||
(global-unset-key viper-mouse-down-insert-key-parsed))
|
||
(setq viper-mouse-up-insert-key-parsed nil
|
||
viper-mouse-down-insert-key-parsed nil))
|
||
|
||
;; If FORCE, bind even if this mouse action is already bound to something else
|
||
(defun viper-bind-mouse-search-key (&optional force)
|
||
(setq viper-mouse-up-search-key-parsed
|
||
(viper-parse-mouse-key 'viper-mouse-search-key 'up)
|
||
viper-mouse-down-search-key-parsed
|
||
(viper-parse-mouse-key 'viper-mouse-search-key 'down))
|
||
(cond ((not (and viper-mouse-up-search-key-parsed
|
||
viper-mouse-down-search-key-parsed))
|
||
nil) ; just quit
|
||
((and (null force)
|
||
(key-binding viper-mouse-up-search-key-parsed)
|
||
(not (eq (key-binding viper-mouse-up-search-key-parsed)
|
||
'viper-mouse-click-search-word)))
|
||
(message
|
||
"%S already bound to a mouse event. Viper mouse-search feature disabled"
|
||
viper-mouse-up-search-key-parsed))
|
||
((and (null force)
|
||
(key-binding viper-mouse-down-search-key-parsed)
|
||
(not (eq (key-binding viper-mouse-down-search-key-parsed)
|
||
'viper-mouse-catch-frame-switch)))
|
||
(message
|
||
"%S already bound to a mouse event. Viper mouse-search feature disabled"
|
||
viper-mouse-down-search-key-parsed))
|
||
(t
|
||
(global-set-key viper-mouse-up-search-key-parsed
|
||
#'viper-mouse-click-search-word)
|
||
(global-set-key viper-mouse-down-search-key-parsed
|
||
#'viper-mouse-catch-frame-switch))))
|
||
|
||
;; If FORCE, bind even if this mouse action is already bound to something else
|
||
(defun viper-bind-mouse-insert-key (&optional force)
|
||
(setq viper-mouse-up-insert-key-parsed
|
||
(viper-parse-mouse-key 'viper-mouse-insert-key 'up)
|
||
viper-mouse-down-insert-key-parsed
|
||
(viper-parse-mouse-key 'viper-mouse-insert-key 'down))
|
||
(cond ((not (and viper-mouse-up-insert-key-parsed
|
||
viper-mouse-down-insert-key-parsed))
|
||
nil) ; just quit
|
||
((and (null force)
|
||
(key-binding viper-mouse-up-insert-key-parsed)
|
||
(not (eq (key-binding viper-mouse-up-insert-key-parsed)
|
||
'viper-mouse-click-insert-word)))
|
||
(message
|
||
"%S already bound to a mouse event. Viper mouse-insert feature disabled"
|
||
viper-mouse-up-insert-key-parsed))
|
||
((and (null force)
|
||
(key-binding viper-mouse-down-insert-key-parsed)
|
||
(not (eq (key-binding viper-mouse-down-insert-key-parsed)
|
||
'viper-mouse-catch-frame-switch)))
|
||
(message
|
||
"%S already bound to a mouse event. Viper mouse-insert feature disabled"
|
||
viper-mouse-down-insert-key-parsed))
|
||
(t
|
||
(global-set-key viper-mouse-up-insert-key-parsed
|
||
#'viper-mouse-click-insert-word)
|
||
(global-set-key viper-mouse-down-insert-key-parsed
|
||
#'viper-mouse-catch-frame-switch))))
|
||
|
||
(defun viper-reset-mouse-search-key (symb val)
|
||
(viper-unbind-mouse-search-key)
|
||
(set symb val)
|
||
(viper-bind-mouse-search-key 'force))
|
||
|
||
(defun viper-reset-mouse-insert-key (symb val)
|
||
(viper-unbind-mouse-insert-key)
|
||
(set symb val)
|
||
(viper-bind-mouse-insert-key 'force))
|
||
|
||
|
||
(defcustom viper-mouse-search-key '(meta shift 1)
|
||
"Key used to click-search in Viper.
|
||
This must be a list that specifies the mouse button and modifiers.
|
||
The supported modifiers are `meta', `shift', and `control'.
|
||
For instance, `(meta shift 1)' means that holding the meta and shift
|
||
keys down and clicking on a word with mouse button 1
|
||
will search for that word in the buffer that was current before the click.
|
||
This buffer may be different from the one where the click occurred."
|
||
:type '(list (set :inline t :tag "Modifiers" :format "%t: %v"
|
||
(const :format "%v " meta)
|
||
(const :format "%v " shift)
|
||
(const control))
|
||
(integer :tag "Button"))
|
||
:set #'viper-reset-mouse-search-key)
|
||
|
||
(defcustom viper-mouse-insert-key '(meta shift 2)
|
||
"Key used to click-insert in Viper.
|
||
Must be a list that specifies the mouse button and modifiers.
|
||
The supported modifiers are `meta', `shift', and `control'.
|
||
For instance, `(meta shift 2)' means that holding the meta and shift keys
|
||
down, and clicking on a word with mouse button 2, will insert that word
|
||
at the cursor in the buffer that was current just before the click.
|
||
This buffer may be different from the one where the click occurred."
|
||
:type '(list (set :inline t :tag "Modifiers" :format "%t: %v"
|
||
(const :format "%v " meta)
|
||
(const :format "%v " shift)
|
||
(const control))
|
||
(integer :tag "Button"))
|
||
:set #'viper-reset-mouse-insert-key)
|
||
|
||
(provide 'viper-mous)
|
||
;;; viper-mous.el ends here
|