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1 ;;; buffer.el --- buffer routines taken from C
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2 ;;; Copyright (C) 1985-1989, 1992-1995 Free Software Foundation, Inc.
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3 ;;; Copyright (C) 1995 Sun Microsystems.
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4 ;;; Copyright (C) 1995, 1996 Ben Wing.
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5
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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20 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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21
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22 ;;; Synched up with: FSF 19.30 buffer.c.
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23
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24 ;;; Code:
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25
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26 (defun switch-to-buffer (bufname &optional norecord)
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27 "Select buffer BUFNAME in the current window.
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28 BUFNAME may be a buffer or a buffer name.
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29 Optional second arg NORECORD non-nil means
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30 do not put this buffer at the front of the list of recently selected ones.
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31
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32 WARNING: This is NOT the way to work on another buffer temporarily
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33 within a Lisp program! Use `set-buffer' instead. That avoids messing with
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34 the window-buffer correspondences."
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35 (interactive "BSwitch to buffer: ")
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36 ;; #ifdef I18N3
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37 ;; #### Doc string should indicate that the buffer name will get
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38 ;; translated.
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39 ;; #endif
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40 (if (eq (minibuffer-window) (selected-window))
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41 (error "Cannot switch buffers in minibuffer window"))
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42 (if (window-dedicated-p (selected-window))
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43 (error "Cannot switch buffers in a dedicated window"))
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44 (let (buf)
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45 (if (null bufname)
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46 (setq buf (other-buffer (current-buffer)))
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47 (setq buf (get-buffer bufname))
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48 (if (null buf)
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49 (progn
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50 (setq buf (get-buffer-create bufname))
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51 (set-buffer-major-mode buf))))
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52 (push-window-configuration)
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53 (set-buffer buf)
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54 (or norecord (record-buffer buf))
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55 (set-window-buffer (if (eq (selected-window) (minibuffer-window))
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56 (next-window (minibuffer-window))
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57 (selected-window))
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58 buf)
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59 buf))
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60
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61 (defun pop-to-buffer (bufname &optional not-this-window-p on-frame)
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62 "Select buffer BUFNAME in some window, preferably a different one.
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63 If BUFNAME is nil, then some other buffer is chosen.
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64 If `pop-up-windows' is non-nil, windows can be split to do this.
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65 If optional second arg NOT-THIS-WINDOW-P is non-nil, insist on finding
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66 another window even if BUFNAME is already visible in the selected window.
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67 If optional third arg is non-nil, it is the frame to pop to this
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68 buffer on."
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69 ;; #ifdef I18N3
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70 ;; #### Doc string should indicate that the buffer name will get
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71 ;; translated.
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72 ;; #endif
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73 (let (buf window frame)
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74 (if (null bufname)
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75 (setq buf (other-buffer (current-buffer)))
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76 (setq buf (get-buffer bufname))
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77 (if (null buf)
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78 (progn
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79 (setq buf (get-buffer-create bufname))
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80 (set-buffer-major-mode buf))))
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81 (push-window-configuration)
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82 (set-buffer buf)
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83 (setq window (display-buffer buf not-this-window-p on-frame))
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84 (setq frame (window-frame window))
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85 ;; if the display-buffer hook decided to show this buffer in another
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86 ;; frame, then select that frame.
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87 (if (not (eq frame (selected-frame)))
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88 (select-frame frame))
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89 (record-buffer buf)
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90 (select-window window)
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91 buf))
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