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1 ;;; mule-composite-stub.el --- Stubs of composition support -*- coding: iso-2022-7bit; -*-
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2
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3 ;; Copyright (C) 2002 Ben Wing.
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4
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5 ;; Keywords: multibyte character, composition
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software; you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; XEmacs is distributed in the hope that it will be useful, but
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15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ;; General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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21 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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22 ;; 02111-1307, USA.
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23
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24 ;;; Synched up with: Emacs 21.1 (src/fontset.c, src/composite.c).
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25
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26 ;;; Commentary:
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27
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28 ;;; Code:
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29
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30 (defvar use-default-ascent (make-char-table 'generic)
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31 "UNIMPLEMENTED.
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32 Char table of characters whose ascent values should be ignored.
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33 If an entry for a character is non-nil, the ascent value of the glyph
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34 is assumed to be what specified by _MULE_DEFAULT_ASCENT property of a font.
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35
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36 This affects how a composite character which contains
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37 such a character is displayed on screen.")
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38
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39 (defvar ignore-relative-composition (make-char-table 'generic)
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40 "UNIMPLEMENTED.
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41 Char table of characters which is not composed relatively.
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42 If an entry for a character is non-nil, a composition sequence
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43 which contains that character is displayed so that
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44 the glyph of that character is put without considering
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45 an ascent and descent value of a previous character.")
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46
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47 (defvar compose-chars-after-function 'compose-chars-after
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48 "UNIMPLEMENTED.
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49 Function to adjust composition of buffer text.
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50
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51 The function is called with three arguments FROM, TO, and OBJECT.
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52 FROM and TO specify the range of text of which composition should be
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53 adjusted. OBJECT, if non-nil, is a string that contains the text.
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54
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55 This function is called after a text with `composition' property is
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56 inserted or deleted to keep `composition' property of buffer text
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57 valid.
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58
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59 The default value is the function `compose-chars-after'.")
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60
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61 (defvar composition-function-table (make-char-table 'generic)
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62 "UNIMPLEMENTED.
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63 Char table of patterns and functions to make a composition.
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64
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65 Each element is nil or an alist of PATTERNs vs FUNCs, where PATTERNs
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66 are regular expressions and FUNCs are functions. FUNC is responsible
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67 for composing text matching the corresponding PATTERN. FUNC is called
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68 with three arguments FROM, TO, and PATTERN. See the function
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69 `compose-chars-after' for more detail.
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70
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71 This table is looked up by the first character of a composition when
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72 the composition gets invalid after a change in a buffer.")
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73
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74 (defun compose-region-internal (start end &optional components mod-func)
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75 "UNIMPLEMENTED.
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76 Internal use only.
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77
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78 Compose text in the region between START and END.
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79 Optional 3rd and 4th arguments are COMPONENTS and MODIFICATION-FUNC
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80 for the composition. See `compose-region' for more detial."
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81 nil)
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82
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83 (defun compose-string-internal (string start end &optional components mod-func)
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84 "UNIMPLEMENTED.
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85 Internal use only.
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86
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87 Compose text between indices START and END of STRING.
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88 Optional 4th and 5th arguments are COMPONENTS and MODIFICATION-FUNC
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89 for the composition. See `compose-string' for more detial."
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90 nil)
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91
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92 (defun find-composition-internal (pos limit string detail-p)
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93 "UNIMPLEMENTED.
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94 Internal use only.
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95
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96 Return information about composition at or nearest to position POS.
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97 See `find-composition' for more detail."
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98 nil)
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