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209
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1 ;;; buffer.el --- buffer routines taken from C
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2
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3 ;; Copyright (C) 1985-1989, 1992-1995, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Sun Microsystems.
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5 ;; Copyright (C) 1995, 1996 Ben Wing.
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6
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7 ;; Maintainer: XEmacs Development Team
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8 ;; Keywords: internal, dumped
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs; see the file COPYING. If not, write to the
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24 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Synched up with: FSF 19.30 buffer.c.
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28
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29 ;;; Commentary:
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30
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31 ;; This file is dumped with XEmacs.
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32
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33 ;;; Code:
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34
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35 (defun switch-to-buffer (bufname &optional norecord)
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36 "Select buffer BUFNAME in the current window.
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219
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37 BUFNAME may be a buffer or a buffer name and is created if did not exist.
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209
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38 Optional second arg NORECORD non-nil means
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39 do not put this buffer at the front of the list of recently selected ones.
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40
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41 WARNING: This is NOT the way to work on another buffer temporarily
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42 within a Lisp program! Use `set-buffer' instead. That avoids messing with
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43 the window-buffer correspondences."
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44 (interactive "BSwitch to buffer: ")
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45 ;; #ifdef I18N3
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46 ;; #### Doc string should indicate that the buffer name will get
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47 ;; translated.
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48 ;; #endif
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49 (if (eq (minibuffer-window) (selected-window))
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50 (error "Cannot switch buffers in minibuffer window"))
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51 (if (window-dedicated-p (selected-window))
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52 (error "Cannot switch buffers in a dedicated window"))
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53 (let (buf)
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54 (if (null bufname)
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55 (setq buf (other-buffer (current-buffer)))
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56 (setq buf (get-buffer bufname))
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57 (if (null buf)
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58 (progn
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59 (setq buf (get-buffer-create bufname))
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60 (set-buffer-major-mode buf))))
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61 (push-window-configuration)
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62 (set-buffer buf)
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63 (or norecord (record-buffer buf))
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64 (set-window-buffer (if (eq (selected-window) (minibuffer-window))
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65 (next-window (minibuffer-window))
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66 (selected-window))
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67 buf)
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68 buf))
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69
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70 (defun pop-to-buffer (bufname &optional not-this-window-p on-frame)
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71 "Select buffer BUFNAME in some window, preferably a different one.
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72 If BUFNAME is nil, then some other buffer is chosen.
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73 If `pop-up-windows' is non-nil, windows can be split to do this.
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74 If optional second arg NOT-THIS-WINDOW-P is non-nil, insist on finding
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75 another window even if BUFNAME is already visible in the selected window.
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76 If optional third arg is non-nil, it is the frame to pop to this
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77 buffer on.
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78 If `focus-follows-mouse' is non-nil, keyboard focus is left unchanged."
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79 ;; #ifdef I18N3
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80 ;; #### Doc string should indicate that the buffer name will get
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81 ;; translated.
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82 ;; #endif
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83 ;; This is twisted. It is evil to throw the keyboard focus around
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84 ;; willy-nilly if the user wants focus-follows-mouse.
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85 (let ((oldbuf (current-buffer))
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86 buf window frame)
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87 (if (null bufname)
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88 (setq buf (other-buffer (current-buffer)))
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89 (setq buf (get-buffer bufname))
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90 (if (null buf)
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91 (progn
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92 (setq buf (get-buffer-create bufname))
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93 (set-buffer-major-mode buf))))
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94 (push-window-configuration)
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95 (set-buffer buf)
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96 (setq window (display-buffer buf not-this-window-p on-frame))
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97 (setq frame (window-frame window))
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98 ;; if the display-buffer hook decided to show this buffer in another
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99 ;; frame, then select that frame, (unless obeying focus-follows-mouse -sb).
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100 (if (and (not focus-follows-mouse)
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101 (not (eq frame (selected-frame))))
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102 (select-frame frame))
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103 (record-buffer buf)
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104 (if (and focus-follows-mouse
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105 on-frame
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106 (not (eq on-frame (selected-frame))))
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107 (set-buffer oldbuf)
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108 ;; select-window will modify the internal keyboard focus of XEmacs
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109 (select-window window))
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110 buf))
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111
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112 ;;; buffer.el ends here
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