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1 /* Buffer insertion/deletion and gap motion for XEmacs.
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2 Copyright (C) 1985-1994 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* Mostly rewritten by Ben Wing. */
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24
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25 #ifndef _XEMACS_INSDEL_H_
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26 #define _XEMACS_INSDEL_H_
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27
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28 /************************************************************************/
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29 /* changing a buffer's text */
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30 /************************************************************************/
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31
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32 extern int begin_multiple_change (struct buffer *buf, Bufpos start,
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33 Bufpos end);
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34 extern void end_multiple_change (struct buffer *buf, int count);
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35
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36 /* flags for functions below */
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37
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38 #define INSDEL_BEFORE_MARKERS 1
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39 #define INSDEL_NO_LOCKING 2
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40
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41 Charcount buffer_insert_string_1 (struct buffer *buf, Bufpos pos,
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42 CONST Bufbyte *nonreloc, Lisp_Object reloc,
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43 Bytecount offset, Bytecount length,
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44 int flags);
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45 Charcount buffer_insert_raw_string_1 (struct buffer *buf, Bufpos pos,
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46 CONST Bufbyte *nonreloc,
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47 Bytecount length, int flags);
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48 Charcount buffer_insert_lisp_string_1 (struct buffer *buf, Bufpos pos,
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49 Lisp_Object str, int flags);
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50 Charcount buffer_insert_c_string_1 (struct buffer *buf, Bufpos pos,
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51 CONST char *s, int flags);
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52 Charcount buffer_insert_emacs_char_1 (struct buffer *buf, Bufpos pos,
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53 Emchar ch, int flags);
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54 Charcount buffer_insert_c_char_1 (struct buffer *buf, Bufpos pos, char c,
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55 int flags);
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56 Charcount buffer_insert_from_buffer_1 (struct buffer *buf, Bufpos pos,
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57 struct buffer *buf2, Bufpos pos2,
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58 Charcount length, int flags);
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59
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60 /* Macros for insertion functions that insert at point after markers.
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61 All of these can GC. */
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62
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63 #define buffer_insert_string(buf, nonreloc, reloc, offset, length) \
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64 buffer_insert_string_1 (buf, -1, nonreloc, reloc, offset, length, 0)
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65 #define buffer_insert_raw_string(buf, string, length) \
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66 buffer_insert_raw_string_1 (buf, -1, string, length, 0)
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67 #define buffer_insert_c_string(buf, s) \
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68 buffer_insert_c_string_1 (buf, -1, s, 0)
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69 #define buffer_insert_lisp_string(buf, str) \
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70 buffer_insert_lisp_string_1 (buf, -1, str, 0)
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71 #define buffer_insert_c_char(buf, c) \
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72 buffer_insert_c_char_1 (buf, -1, c, 0)
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73 #define buffer_insert_emacs_char(buf, ch) \
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74 buffer_insert_emacs_char_1 (buf, -1, ch, 0)
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75 #define buffer_insert_from_buffer(buf, b, index, length) \
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76 buffer_insert_from_buffer_1 (buf, -1, b, index, length, 0)
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77
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78 extern void buffer_delete_range (struct buffer *buf, Bufpos from, Bufpos to,
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79 int flags);
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80 extern void buffer_replace_char (struct buffer *b, Bufpos pos, Emchar ch,
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81 int not_real_change, int force_lock_check);
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82
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83
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84
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85
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86 /************************************************************************/
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87 /* tracking buffer changes */
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88 /************************************************************************/
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89
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90 /* Split into two parts. One part goes with a buffer's text (possibly
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91 shared), the other with the buffer itself. */
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92
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93 struct buffer_text_change_data
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94 {
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95 /* multiple change stuff */
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96 int in_multiple_change;
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97 Bufpos mc_begin, mc_orig_end, mc_new_end;
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98 int mc_begin_signaled;
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99 };
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100
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101 struct each_buffer_change_data
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102 {
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103 Charcount begin_unchanged, end_unchanged;
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104 /* redisplay needs to know if a newline was deleted so its
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105 incremental-redisplay algorithm will fail */
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106 int newline_was_deleted;
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107 Charcount begin_extent_unchanged, end_extent_unchanged;
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108 };
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109
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110 /* Number of characters at the beginning and end of the buffer that
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111 have not changed since the last call to buffer_reset_changes().
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112 If no changes have occurred since then, both values will be -1.
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113
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114 "Changed" means that the text has changed. */
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115
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116 #define BUF_BEGIN_UNCHANGED(buf) ((buf)->changes->begin_unchanged)
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117 #define BUF_END_UNCHANGED(buf) ((buf)->changes->end_unchanged)
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118
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119 /* Number of characters at the beginning and end of the buffer that
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120 have not had a covering extent change since the last call to
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121 buffer_reset_changes (). If no changes have occurred since then,
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122 both values will be -1.
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123
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124 "Changed" means that the extents covering the text have changed. */
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125
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126 #define BUF_EXTENT_BEGIN_UNCHANGED(buf) \
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127 ((buf)->changes->begin_extent_unchanged)
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128 #define BUF_EXTENT_END_UNCHANGED(buf) \
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129 ((buf)->changes->end_extent_unchanged)
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130
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131 #define BUF_NEWLINE_WAS_DELETED(buf) \
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132 ((buf)->changes->newline_was_deleted)
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133
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134 extern void buffer_extent_signal_changed_region (struct buffer *buf,
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135 Bufpos start,
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136 Bufpos end);
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137 extern void buffer_reset_changes (struct buffer *buf);
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138
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139
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140
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141
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142 /************************************************************************/
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143 /* other related functions */
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144 /************************************************************************/
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145
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146 extern Memind do_marker_adjustment (Memind mpos, Memind from,
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147 Memind to, int amount);
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148
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149 extern void fixup_internal_substring (CONST Bufbyte *nonreloc,
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150 Lisp_Object reloc,
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151 int offset, int *len);
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152
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153 /* In font-lock.c */
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154 extern void font_lock_maybe_update_syntactic_caches (struct buffer *buf,
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155 Bufpos start,
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156 Bufpos orig_end,
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157 Bufpos new_end);
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158 extern void font_lock_buffer_was_killed (struct buffer *buf);
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159
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160 extern void barf_if_buffer_read_only (struct buffer *buf, Bufpos from,
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161 Bufpos to);
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162
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163 /* In marker.c */
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164 void init_buffer_markers (struct buffer *b);
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165 void uninit_buffer_markers (struct buffer *b);
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166
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167 extern Lisp_Object make_string_from_buffer (struct buffer *buf, Bufpos pos,
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168 Charcount length);
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169 extern void init_buffer_text (struct buffer *b, int indirect_p);
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170 extern void uninit_buffer_text (struct buffer *b, int indirect_p);
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171
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172
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173
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174 #endif /* _XEMACS_INSDEL_H_ */
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