[dab82f29] | 1 | /* Copyright (c) 2002,2003,2004,2009 James M. Kretchmar |
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| 2 | * |
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| 3 | * This file is part of Owl. |
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| 4 | * |
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| 5 | * Owl is free software: you can redistribute it and/or modify |
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| 6 | * it under the terms of the GNU General Public License as published by |
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| 7 | * the Free Software Foundation, either version 3 of the License, or |
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| 8 | * (at your option) any later version. |
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| 9 | * |
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| 10 | * Owl is distributed in the hope that it will be useful, |
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | * GNU General Public License for more details. |
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| 14 | * |
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| 15 | * You should have received a copy of the GNU General Public License |
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| 16 | * along with Owl. If not, see <http://www.gnu.org/licenses/>. |
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| 17 | * |
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| 18 | * --------------------------------------------------------------- |
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| 19 | * |
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| 20 | * As of Owl version 2.1.12 there are patches contributed by |
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| 21 | * developers of the the branched BarnOwl project, Copyright (c) |
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| 22 | * 2006-2008 The BarnOwl Developers. All rights reserved. |
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| 23 | */ |
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| 24 | |
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[7d4fbcd] | 25 | #include "owl.h" |
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| 26 | #include <stdlib.h> |
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| 27 | #include <unistd.h> |
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| 28 | #include <string.h> |
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[10b866d] | 29 | #include <ctype.h> |
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[7d4fbcd] | 30 | |
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[1aee7d9] | 31 | static const char fileIdent[] = "$Id$"; |
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| 32 | |
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[7d4fbcd] | 33 | #define INCR 5000 |
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| 34 | |
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[cf83b7a] | 35 | /* initialize the editwin e. |
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| 36 | * 'win' is an already initialzed curses window that will be used by editwin |
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| 37 | */ |
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[c9334b1] | 38 | void owl_editwin_init(owl_editwin *e, WINDOW *win, int winlines, int wincols, int style, owl_history *hist) |
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| 39 | { |
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[10b866d] | 40 | e->buff=owl_malloc(INCR); |
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[7d4fbcd] | 41 | e->buff[0]='\0'; |
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| 42 | e->bufflen=0; |
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[10b866d] | 43 | e->hist=hist; |
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[7d4fbcd] | 44 | e->allocated=INCR; |
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| 45 | e->buffx=0; |
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| 46 | e->buffy=0; |
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| 47 | e->topline=0; |
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| 48 | e->winlines=winlines; |
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| 49 | e->wincols=wincols; |
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[cf83b7a] | 50 | e->fillcol=owl_editwin_limit_maxcols(wincols-1, owl_global_get_edit_maxfillcols(&g)); |
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| 51 | e->wrapcol=owl_editwin_limit_maxcols(wincols-1, owl_global_get_edit_maxwrapcols(&g)); |
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[7d4fbcd] | 52 | e->curswin=win; |
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| 53 | e->style=style; |
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| 54 | if ((style!=OWL_EDITWIN_STYLE_MULTILINE) && |
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| 55 | (style!=OWL_EDITWIN_STYLE_ONELINE)) { |
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| 56 | e->style=OWL_EDITWIN_STYLE_MULTILINE; |
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| 57 | } |
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| 58 | e->lock=0; |
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| 59 | e->dotsend=0; |
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[c9334b1] | 60 | e->echochar='\0'; |
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[7d4fbcd] | 61 | if (win) werase(win); |
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| 62 | } |
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| 63 | |
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[c9334b1] | 64 | void owl_editwin_set_curswin(owl_editwin *e, WINDOW *w, int winlines, int wincols) |
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| 65 | { |
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[7d4fbcd] | 66 | e->curswin=w; |
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| 67 | e->winlines=winlines; |
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| 68 | e->wincols=wincols; |
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[cf83b7a] | 69 | e->fillcol=owl_editwin_limit_maxcols(wincols-1, owl_global_get_edit_maxfillcols(&g)); |
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| 70 | e->wrapcol=owl_editwin_limit_maxcols(wincols-1, owl_global_get_edit_maxwrapcols(&g)); |
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[7d4fbcd] | 71 | } |
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| 72 | |
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[c9334b1] | 73 | /* echo the character 'ch' for each normal character keystroke, |
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| 74 | * excepting locktext. This is useful for entering passwords etc. If |
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| 75 | * ch=='\0' characters are echo'd normally |
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| 76 | */ |
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| 77 | void owl_editwin_set_echochar(owl_editwin *e, int ch) |
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| 78 | { |
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| 79 | e->echochar=ch; |
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| 80 | } |
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| 81 | |
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| 82 | WINDOW *owl_editwin_get_curswin(owl_editwin *e) |
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| 83 | { |
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[060b3b4] | 84 | return(e->curswin); |
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[7d4fbcd] | 85 | } |
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| 86 | |
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[c9334b1] | 87 | void owl_editwin_set_history(owl_editwin *e, owl_history *h) |
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| 88 | { |
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[060b3b4] | 89 | e->hist=h; |
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[10b866d] | 90 | } |
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| 91 | |
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[c9334b1] | 92 | owl_history *owl_editwin_get_history(owl_editwin *e) |
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| 93 | { |
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[060b3b4] | 94 | return(e->hist); |
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[10b866d] | 95 | } |
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| 96 | |
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[c9334b1] | 97 | void owl_editwin_set_dotsend(owl_editwin *e) |
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| 98 | { |
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[7d4fbcd] | 99 | e->dotsend=1; |
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| 100 | } |
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| 101 | |
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[c9334b1] | 102 | int owl_editwin_limit_maxcols(int v, int maxv) |
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| 103 | { |
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[d36f2cb] | 104 | if (maxv > 5 && v > maxv) { |
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[060b3b4] | 105 | return(maxv); |
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[d36f2cb] | 106 | } else { |
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[060b3b4] | 107 | return(v); |
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[d36f2cb] | 108 | } |
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| 109 | } |
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| 110 | |
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[c9334b1] | 111 | /* set text to be 'locked in' at the beginning of the buffer, any |
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| 112 | * previous text (including locked text) will be overwritten |
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| 113 | */ |
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| 114 | void owl_editwin_set_locktext(owl_editwin *e, char *text) |
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| 115 | { |
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[7d4fbcd] | 116 | |
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| 117 | int x, y; |
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| 118 | |
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| 119 | x=e->buffx; |
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| 120 | y=e->buffy; |
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| 121 | e->buffx=0; |
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| 122 | e->buffy=0; |
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| 123 | owl_editwin_overwrite_string(e, text); |
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| 124 | e->lock=strlen(text); |
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| 125 | /* if (text[e->lock-1]=='\n') e->lock--; */ |
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| 126 | e->buffx=x; |
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| 127 | e->buffy=y; |
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| 128 | owl_editwin_adjust_for_locktext(e); |
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| 129 | owl_editwin_redisplay(e, 0); |
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| 130 | } |
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| 131 | |
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[c9334b1] | 132 | int owl_editwin_get_style(owl_editwin *e) |
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| 133 | { |
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[7d4fbcd] | 134 | return(e->style); |
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| 135 | } |
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| 136 | |
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[c9334b1] | 137 | void owl_editwin_new_style(owl_editwin *e, int newstyle, owl_history *h) |
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| 138 | { |
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[7d4fbcd] | 139 | char *ptr; |
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[10b866d] | 140 | |
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| 141 | owl_editwin_set_history(e, h); |
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[7d4fbcd] | 142 | if (e->style==newstyle) return; |
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| 143 | |
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| 144 | if (newstyle==OWL_EDITWIN_STYLE_MULTILINE) { |
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| 145 | e->style=newstyle; |
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| 146 | } else if (newstyle==OWL_EDITWIN_STYLE_ONELINE) { |
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| 147 | e->style=newstyle; |
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| 148 | |
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| 149 | /* nuke everything after the first line */ |
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| 150 | if (e->bufflen > 0) { |
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| 151 | ptr=strchr(e->buff, '\n')-1; |
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| 152 | if (ptr) { |
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| 153 | e->bufflen=ptr - e->buff; |
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| 154 | e->buff[e->bufflen]='\0'; |
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| 155 | e->buffx=0; |
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| 156 | e->buffy=0; |
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| 157 | } |
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| 158 | } |
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| 159 | } |
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| 160 | } |
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| 161 | |
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[c9334b1] | 162 | /* completly reinitialize the buffer */ |
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| 163 | void owl_editwin_fullclear(owl_editwin *e) |
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| 164 | { |
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[7d4fbcd] | 165 | owl_free(e->buff); |
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[10b866d] | 166 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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[7d4fbcd] | 167 | } |
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| 168 | |
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[c9334b1] | 169 | /* clear all text except for locktext and put the cursor at the |
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| 170 | * beginning |
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| 171 | */ |
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| 172 | void owl_editwin_clear(owl_editwin *e) |
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| 173 | { |
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| 174 | |
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[7d4fbcd] | 175 | int lock; |
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[10b866d] | 176 | int dotsend=e->dotsend; |
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[7d4fbcd] | 177 | char *locktext=NULL; |
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[10b866d] | 178 | |
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[7d4fbcd] | 179 | lock=0; |
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| 180 | if (e->lock > 0) { |
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| 181 | lock=1; |
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| 182 | |
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| 183 | locktext=owl_malloc(e->lock+20); |
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| 184 | strncpy(locktext, e->buff, e->lock); |
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| 185 | locktext[e->lock]='\0'; |
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| 186 | } |
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| 187 | |
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| 188 | owl_free(e->buff); |
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[10b866d] | 189 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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[7d4fbcd] | 190 | |
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| 191 | if (lock > 0) { |
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| 192 | owl_editwin_set_locktext(e, locktext); |
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| 193 | } |
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[10b866d] | 194 | if (dotsend) { |
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| 195 | owl_editwin_set_dotsend(e); |
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| 196 | } |
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[7d4fbcd] | 197 | |
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| 198 | if (locktext) owl_free(locktext); |
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| 199 | owl_editwin_adjust_for_locktext(e); |
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| 200 | } |
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| 201 | |
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[c9334b1] | 202 | /* malloc more space for the buffer */ |
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| 203 | void _owl_editwin_addspace(owl_editwin *e) |
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| 204 | { |
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[7d4fbcd] | 205 | e->buff=owl_realloc(e->buff, e->allocated+INCR); |
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| 206 | if (!e->buff) { |
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| 207 | /* error */ |
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| 208 | return; |
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| 209 | } |
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| 210 | e->allocated+=INCR; |
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| 211 | } |
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| 212 | |
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[c9334b1] | 213 | void owl_editwin_recenter(owl_editwin *e) |
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| 214 | { |
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[7d4fbcd] | 215 | e->topline=e->buffy-(e->winlines/2); |
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| 216 | if (e->topline<0) e->topline=0; |
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| 217 | if (e->topline>owl_editwin_get_numlines(e)) e->topline=owl_editwin_get_numlines(e); |
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| 218 | } |
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| 219 | |
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[c9334b1] | 220 | /* regenerate the text on the curses window */ |
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| 221 | /* if update == 1 then do a doupdate(), otherwise do not */ |
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| 222 | void owl_editwin_redisplay(owl_editwin *e, int update) |
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| 223 | { |
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[7d4fbcd] | 224 | |
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| 225 | char *ptr1, *ptr2, *ptr3, *buff; |
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[cf83b7a] | 226 | int i; |
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[7d4fbcd] | 227 | |
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| 228 | werase(e->curswin); |
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| 229 | wmove(e->curswin, 0, 0); |
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| 230 | |
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| 231 | /* start at topline */ |
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| 232 | ptr1=e->buff; |
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| 233 | for (i=0; i<e->topline; i++) { |
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| 234 | ptr2=strchr(ptr1, '\n'); |
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| 235 | if (!ptr2) { |
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| 236 | /* we're already on the last line */ |
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| 237 | break; |
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| 238 | } |
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| 239 | ptr1=ptr2+1; |
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| 240 | } |
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| 241 | /* ptr1 now stores the starting point */ |
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| 242 | |
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| 243 | /* find the ending point and store it in ptr3 */ |
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| 244 | ptr2=ptr1; |
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| 245 | ptr3=ptr1; |
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| 246 | for (i=0; i<e->winlines; i++) { |
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| 247 | ptr3=strchr(ptr2, '\n'); |
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| 248 | if (!ptr3) { |
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| 249 | /* we've hit the last line */ |
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| 250 | /* print everything to the end */ |
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| 251 | ptr3=e->buff+e->bufflen-1; |
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| 252 | ptr3--; |
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| 253 | break; |
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| 254 | } |
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| 255 | ptr2=ptr3+1; |
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| 256 | } |
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| 257 | ptr3+=2; |
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| 258 | |
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| 259 | buff=owl_malloc(ptr3-ptr1+50); |
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| 260 | strncpy(buff, ptr1, ptr3-ptr1); |
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| 261 | buff[ptr3-ptr1]='\0'; |
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[c9334b1] | 262 | if (e->echochar=='\0') { |
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| 263 | waddstr(e->curswin, buff); |
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| 264 | } else { |
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| 265 | /* translate to echochar, *except* for the locktext */ |
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| 266 | int len; |
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| 267 | int dolocklen=e->lock-(ptr1-e->buff); |
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| 268 | |
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| 269 | for (i=0; i<dolocklen; i++) { |
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| 270 | waddch(e->curswin, buff[i]); |
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| 271 | } |
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| 272 | len=strlen(buff); |
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| 273 | for (i=0; i<len-dolocklen; i++) { |
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| 274 | waddch(e->curswin, e->echochar); |
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| 275 | } |
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| 276 | } |
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[7d4fbcd] | 277 | wmove(e->curswin, e->buffy-e->topline, e->buffx); |
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| 278 | wnoutrefresh(e->curswin); |
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| 279 | if (update==1) { |
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| 280 | doupdate(); |
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| 281 | } |
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| 282 | owl_free(buff); |
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| 283 | } |
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| 284 | |
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| 285 | |
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[c9334b1] | 286 | /* linewrap the word just before the cursor. |
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| 287 | * returns 0 on success |
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| 288 | * returns -1 if we could not wrap. |
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| 289 | */ |
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| 290 | int _owl_editwin_linewrap_word(owl_editwin *e) |
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| 291 | { |
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[7d4fbcd] | 292 | int i, z; |
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| 293 | |
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| 294 | z=_owl_editwin_get_index_from_xy(e); |
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| 295 | /* move back and line wrap the previous word */ |
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| 296 | for (i=z-1; ; i--) { |
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| 297 | /* move back until you find a space or hit the beginning of the line */ |
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| 298 | if (e->buff[i]==' ') { |
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| 299 | /* replace the space with a newline */ |
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| 300 | e->buff[i]='\n'; |
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| 301 | e->buffy++; |
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| 302 | e->buffx=z-i-1; |
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| 303 | /* were we on the last line */ |
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| 304 | return(0); |
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| 305 | } else if (e->buff[i]=='\n' || i<=e->lock) { |
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| 306 | /* we hit the begginning of the line or the buffer, we cannot |
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| 307 | * wrap. |
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| 308 | */ |
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| 309 | return(-1); |
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| 310 | } |
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| 311 | } |
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| 312 | } |
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| 313 | |
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[c9334b1] | 314 | /* insert a character at the current point (shift later |
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| 315 | * characters over) |
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| 316 | */ |
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| 317 | void owl_editwin_insert_char(owl_editwin *e, char c) |
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| 318 | { |
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[7d4fbcd] | 319 | |
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| 320 | int z, i, ret; |
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| 321 | |
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| 322 | /* \r is \n */ |
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| 323 | if (c=='\r') { |
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| 324 | c='\n'; |
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| 325 | } |
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| 326 | |
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| 327 | if (c=='\n' && e->style==OWL_EDITWIN_STYLE_ONELINE) { |
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| 328 | /* perhaps later this will change some state that allows the string |
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| 329 | to be read */ |
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| 330 | return; |
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| 331 | } |
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| 332 | |
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| 333 | /* make sure there is enough memory for the new text */ |
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| 334 | if ((e->bufflen+1) > (e->allocated-5)) { |
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| 335 | _owl_editwin_addspace(e); |
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| 336 | } |
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| 337 | |
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| 338 | /* get the insertion point */ |
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| 339 | z=_owl_editwin_get_index_from_xy(e); |
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| 340 | |
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| 341 | /* If we're going to insert at the last column do word wrapping, unless it's a \n */ |
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| 342 | if ((e->buffx+1==e->wrapcol) && (c!='\n')) { |
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| 343 | ret=_owl_editwin_linewrap_word(e); |
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| 344 | if (ret==-1) { |
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| 345 | /* we couldn't wrap, insert a hard newline instead */ |
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| 346 | owl_editwin_insert_char(e, '\n'); |
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| 347 | } |
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| 348 | } |
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| 349 | |
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| 350 | z=_owl_editwin_get_index_from_xy(e); |
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| 351 | /* shift all the other characters right */ |
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| 352 | for (i=e->bufflen; i>z; i--) { |
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| 353 | e->buff[i]=e->buff[i-1]; |
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| 354 | } |
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| 355 | |
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| 356 | /* insert the new one */ |
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| 357 | e->buff[z]=c; |
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| 358 | |
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| 359 | /* housekeeping */ |
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| 360 | e->bufflen++; |
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| 361 | e->buff[e->bufflen]='\0'; |
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| 362 | |
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| 363 | /* advance the cursor */ |
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| 364 | if (c=='\n') { |
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| 365 | e->buffx=0; |
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| 366 | e->buffy++; |
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| 367 | } else { |
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| 368 | e->buffx++; |
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| 369 | } |
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| 370 | } |
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| 371 | |
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[c9334b1] | 372 | /* overwrite the character at the current point with 'c' */ |
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| 373 | void owl_editwin_overwrite_char(owl_editwin *e, char c) |
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| 374 | { |
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[7d4fbcd] | 375 | int z; |
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| 376 | |
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| 377 | /* \r is \n */ |
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| 378 | if (c=='\r') { |
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| 379 | c='\n'; |
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| 380 | } |
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| 381 | |
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| 382 | if (c=='\n' && e->style==OWL_EDITWIN_STYLE_ONELINE) { |
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| 383 | /* perhaps later this will change some state that allows the string |
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| 384 | to be read */ |
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| 385 | return; |
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| 386 | } |
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| 387 | |
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| 388 | z=_owl_editwin_get_index_from_xy(e); |
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| 389 | |
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| 390 | /* only if we are at the end of the buffer do we create new space */ |
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| 391 | if (z==e->bufflen) { |
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| 392 | if ((e->bufflen+1) > (e->allocated-5)) { |
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| 393 | _owl_editwin_addspace(e); |
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| 394 | } |
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| 395 | } |
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| 396 | |
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| 397 | e->buff[z]=c; |
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| 398 | |
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| 399 | /* housekeeping if we are at the end of the buffer */ |
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| 400 | if (z==e->bufflen) { |
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| 401 | e->bufflen++; |
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| 402 | e->buff[e->bufflen]='\0'; |
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| 403 | } |
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| 404 | |
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| 405 | /* advance the cursor */ |
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| 406 | if (c=='\n') { |
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| 407 | e->buffx=0; |
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| 408 | e->buffy++; |
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| 409 | } else { |
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| 410 | e->buffx++; |
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| 411 | } |
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| 412 | |
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| 413 | } |
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| 414 | |
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[c9334b1] | 415 | /* delete the character at the current point, following chars |
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| 416 | * shift left. |
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| 417 | */ |
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| 418 | void owl_editwin_delete_char(owl_editwin *e) |
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| 419 | { |
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[7d4fbcd] | 420 | int z, i; |
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| 421 | |
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| 422 | if (e->bufflen==0) return; |
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| 423 | |
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| 424 | /* get the deletion point */ |
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| 425 | z=_owl_editwin_get_index_from_xy(e); |
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| 426 | |
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| 427 | if (z==e->bufflen) return; |
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| 428 | |
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| 429 | for (i=z; i<e->bufflen; i++) { |
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| 430 | e->buff[i]=e->buff[i+1]; |
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| 431 | } |
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| 432 | e->bufflen--; |
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| 433 | e->buff[e->bufflen]='\0'; |
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| 434 | } |
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| 435 | |
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[c9334b1] | 436 | /* Swap the character at point with the character at point-1 and |
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| 437 | * advance the pointer. If point is at beginning of buffer do |
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| 438 | * nothing. If point is after the last character swap point-1 with |
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| 439 | * point-2. (Behaves as observed in tcsh and emacs). |
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| 440 | */ |
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| 441 | void owl_editwin_transpose_chars(owl_editwin *e) |
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| 442 | { |
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[f2e36b5] | 443 | int z; |
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| 444 | char tmp; |
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| 445 | |
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| 446 | if (e->bufflen==0) return; |
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| 447 | |
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| 448 | /* get the cursor point */ |
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| 449 | z=_owl_editwin_get_index_from_xy(e); |
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| 450 | |
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| 451 | if (z==e->bufflen) { |
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| 452 | /* point is after last character */ |
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| 453 | z--; |
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| 454 | } |
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| 455 | |
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| 456 | if (z-1 < e->lock) { |
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| 457 | /* point is at beginning of buffer, do nothing */ |
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| 458 | return; |
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| 459 | } |
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| 460 | |
---|
| 461 | tmp=e->buff[z]; |
---|
| 462 | e->buff[z]=e->buff[z-1]; |
---|
| 463 | e->buff[z-1]=tmp; |
---|
| 464 | owl_editwin_key_right(e); |
---|
| 465 | } |
---|
| 466 | |
---|
[c9334b1] | 467 | /* insert 'string' at the current point, later text is shifted |
---|
| 468 | * right |
---|
| 469 | */ |
---|
| 470 | void owl_editwin_insert_string(owl_editwin *e, char *string) |
---|
| 471 | { |
---|
[7d4fbcd] | 472 | int i, j; |
---|
| 473 | |
---|
| 474 | j=strlen(string); |
---|
| 475 | for (i=0; i<j; i++) { |
---|
| 476 | owl_editwin_insert_char(e, string[i]); |
---|
| 477 | } |
---|
| 478 | } |
---|
| 479 | |
---|
[c9334b1] | 480 | /* write 'string' at the current point, overwriting text that is |
---|
| 481 | * already there |
---|
| 482 | */ |
---|
| 483 | |
---|
| 484 | void owl_editwin_overwrite_string(owl_editwin *e, char *string) |
---|
| 485 | { |
---|
[7d4fbcd] | 486 | int i, j; |
---|
| 487 | |
---|
| 488 | j=strlen(string); |
---|
| 489 | for (i=0; i<j; i++) { |
---|
| 490 | owl_editwin_overwrite_char(e, string[i]); |
---|
| 491 | } |
---|
| 492 | } |
---|
| 493 | |
---|
[c9334b1] | 494 | /* get the index into e->buff for the current cursor |
---|
| 495 | * position. |
---|
| 496 | */ |
---|
| 497 | int _owl_editwin_get_index_from_xy(owl_editwin *e) |
---|
| 498 | { |
---|
[7d4fbcd] | 499 | int i; |
---|
| 500 | char *ptr1, *ptr2; |
---|
| 501 | |
---|
| 502 | if (e->bufflen==0) return(0); |
---|
| 503 | |
---|
| 504 | /* first go to the yth line */ |
---|
| 505 | ptr1=e->buff; |
---|
| 506 | for (i=0; i<e->buffy; i++) { |
---|
| 507 | ptr2=strchr(ptr1, '\n'); |
---|
| 508 | if (!ptr2) { |
---|
| 509 | /* we're already on the last line */ |
---|
| 510 | break; |
---|
| 511 | } |
---|
| 512 | ptr1=ptr2+1; |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | /* now go to the xth character */ |
---|
| 516 | ptr2=strchr(ptr1, '\n'); |
---|
| 517 | if (!ptr2) { |
---|
| 518 | ptr2=e->buff+e->bufflen; |
---|
| 519 | } |
---|
| 520 | |
---|
| 521 | if ((ptr2-ptr1) < e->buffx) { |
---|
| 522 | ptr1=ptr2-1; |
---|
| 523 | } else { |
---|
| 524 | ptr1+=e->buffx; |
---|
| 525 | } |
---|
| 526 | |
---|
| 527 | /* printf("DEBUG: index is %i\r\n", ptr1-e->buff); */ |
---|
| 528 | return(ptr1-e->buff); |
---|
| 529 | } |
---|
| 530 | |
---|
[c9334b1] | 531 | void _owl_editwin_set_xy_by_index(owl_editwin *e, int index) |
---|
| 532 | { |
---|
[7d4fbcd] | 533 | int z, i; |
---|
| 534 | |
---|
| 535 | z=_owl_editwin_get_index_from_xy(e); |
---|
| 536 | if (index>z) { |
---|
| 537 | for (i=0; i<index-z; i++) { |
---|
| 538 | owl_editwin_key_right(e); |
---|
| 539 | } |
---|
| 540 | } else if (index<z) { |
---|
| 541 | for (i=0; i<z-index; i++) { |
---|
| 542 | owl_editwin_key_left(e); |
---|
| 543 | } |
---|
| 544 | } |
---|
| 545 | } |
---|
| 546 | |
---|
[c9334b1] | 547 | void owl_editwin_adjust_for_locktext(owl_editwin *e) |
---|
| 548 | { |
---|
[7d4fbcd] | 549 | /* if we happen to have the cursor over locked text |
---|
| 550 | * move it to be out of the locktext region */ |
---|
| 551 | if (_owl_editwin_get_index_from_xy(e)<e->lock) { |
---|
| 552 | _owl_editwin_set_xy_by_index(e, e->lock); |
---|
| 553 | } |
---|
| 554 | } |
---|
| 555 | |
---|
[c9334b1] | 556 | void owl_editwin_backspace(owl_editwin *e) |
---|
| 557 | { |
---|
[7d4fbcd] | 558 | /* delete the char before the current one |
---|
| 559 | * and shift later chars left |
---|
| 560 | */ |
---|
| 561 | if (_owl_editwin_get_index_from_xy(e) > e->lock) { |
---|
| 562 | owl_editwin_key_left(e); |
---|
| 563 | owl_editwin_delete_char(e); |
---|
| 564 | } |
---|
| 565 | owl_editwin_adjust_for_locktext(e); |
---|
| 566 | } |
---|
| 567 | |
---|
[c9334b1] | 568 | void owl_editwin_key_up(owl_editwin *e) |
---|
| 569 | { |
---|
[7d4fbcd] | 570 | if (e->buffy > 0) e->buffy--; |
---|
| 571 | if (e->buffx >= owl_editwin_get_numchars_on_line(e, e->buffy)) { |
---|
| 572 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | /* do we need to scroll? */ |
---|
| 576 | if (e->buffy-e->topline < 0) { |
---|
| 577 | e->topline-=e->winlines/2; |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | owl_editwin_adjust_for_locktext(e); |
---|
| 581 | } |
---|
| 582 | |
---|
[c9334b1] | 583 | void owl_editwin_key_down(owl_editwin *e) |
---|
| 584 | { |
---|
[7d4fbcd] | 585 | /* move down if we can */ |
---|
| 586 | if (e->buffy+1 < owl_editwin_get_numlines(e)) e->buffy++; |
---|
| 587 | |
---|
| 588 | /* if we're past the last character move back */ |
---|
| 589 | if (e->buffx >= owl_editwin_get_numchars_on_line(e, e->buffy)) { |
---|
| 590 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 591 | } |
---|
| 592 | |
---|
| 593 | /* do we need to scroll? */ |
---|
| 594 | if (e->buffy-e->topline > e->winlines) { |
---|
| 595 | e->topline+=e->winlines/2; |
---|
| 596 | } |
---|
| 597 | |
---|
| 598 | /* adjust for locktext */ |
---|
| 599 | owl_editwin_adjust_for_locktext(e); |
---|
| 600 | } |
---|
| 601 | |
---|
[c9334b1] | 602 | void owl_editwin_key_left(owl_editwin *e) |
---|
| 603 | { |
---|
[7d4fbcd] | 604 | /* move left if we can, and maybe up a line */ |
---|
| 605 | if (e->buffx>0) { |
---|
| 606 | e->buffx--; |
---|
| 607 | } else if (e->buffy>0) { |
---|
| 608 | e->buffy--; |
---|
| 609 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 610 | } |
---|
| 611 | |
---|
| 612 | /* do we need to scroll up? */ |
---|
| 613 | if (e->buffy-e->topline < 0) { |
---|
| 614 | e->topline-=e->winlines/2; |
---|
| 615 | } |
---|
| 616 | |
---|
| 617 | /* make sure to avoid locktext */ |
---|
| 618 | owl_editwin_adjust_for_locktext(e); |
---|
| 619 | } |
---|
| 620 | |
---|
[c9334b1] | 621 | void owl_editwin_key_right(owl_editwin *e) |
---|
| 622 | { |
---|
[7d4fbcd] | 623 | int i; |
---|
| 624 | |
---|
| 625 | /* move right if we can, and skip down a line if needed */ |
---|
| 626 | i=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 627 | if (e->buffx < i) { |
---|
| 628 | e->buffx++; |
---|
| 629 | /* } else if (e->buffy+1 < owl_editwin_get_numlines(e)) { */ |
---|
| 630 | } else if (_owl_editwin_get_index_from_xy(e) < e->bufflen) { |
---|
| 631 | if (e->style==OWL_EDITWIN_STYLE_MULTILINE) { |
---|
| 632 | e->buffx=0; |
---|
| 633 | e->buffy++; |
---|
| 634 | } |
---|
| 635 | } |
---|
| 636 | |
---|
| 637 | /* do we need to scroll down? */ |
---|
| 638 | if (e->buffy-e->topline >= e->winlines) { |
---|
| 639 | e->topline+=e->winlines/2; |
---|
| 640 | } |
---|
| 641 | } |
---|
| 642 | |
---|
[c9334b1] | 643 | void owl_editwin_move_to_nextword(owl_editwin *e) |
---|
| 644 | { |
---|
[7d4fbcd] | 645 | int i, x; |
---|
| 646 | |
---|
| 647 | /* if we're starting on a space, find the first non-space */ |
---|
| 648 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 649 | if (e->buff[i]==' ') { |
---|
| 650 | for (x=i; x<e->bufflen; x++) { |
---|
| 651 | if (e->buff[x]!=' ' && e->buff[x]!='\n') { |
---|
| 652 | _owl_editwin_set_xy_by_index(e, x); |
---|
| 653 | break; |
---|
| 654 | } |
---|
| 655 | } |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | /* find the next space, newline or end of line and go there, if |
---|
| 659 | already at the end of the line, continue on to the next */ |
---|
| 660 | i=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 661 | if (e->buffx < i) { |
---|
| 662 | /* move right till end of line */ |
---|
| 663 | while (e->buffx < i) { |
---|
| 664 | e->buffx++; |
---|
| 665 | if (e->buff[_owl_editwin_get_index_from_xy(e)]==' ') return; |
---|
| 666 | if (e->buffx == i) return; |
---|
| 667 | } |
---|
| 668 | } else if (e->buffx == i) { |
---|
| 669 | /* try to move down */ |
---|
| 670 | if (e->style==OWL_EDITWIN_STYLE_MULTILINE) { |
---|
| 671 | if (e->buffy+1 < owl_editwin_get_numlines(e)) { |
---|
| 672 | e->buffx=0; |
---|
| 673 | e->buffy++; |
---|
| 674 | owl_editwin_move_to_nextword(e); |
---|
| 675 | } |
---|
| 676 | } |
---|
| 677 | } |
---|
| 678 | } |
---|
| 679 | |
---|
[c9334b1] | 680 | /* go backwards to the last non-space character |
---|
| 681 | */ |
---|
| 682 | void owl_editwin_move_to_previousword(owl_editwin *e) |
---|
| 683 | { |
---|
[7d4fbcd] | 684 | int i, x; |
---|
| 685 | |
---|
| 686 | /* are we already at the beginning of the word? */ |
---|
| 687 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 688 | if ( (e->buff[i]!=' ' && e->buff[i]!='\n' && e->buff[i]!='\0') && |
---|
| 689 | (e->buff[i-1]==' ' || e->buff[i-1]=='\n') ) { |
---|
| 690 | owl_editwin_key_left(e); |
---|
| 691 | } |
---|
| 692 | |
---|
| 693 | /* are we starting on a space character? */ |
---|
| 694 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 695 | if (e->buff[i]==' ' || e->buff[i]=='\n' || e->buff[i]=='\0') { |
---|
| 696 | /* find the first non-space */ |
---|
| 697 | for (x=i; x>=e->lock; x--) { |
---|
| 698 | if (e->buff[x]!=' ' && e->buff[x]!='\n' && e->buff[x]!='\0') { |
---|
| 699 | _owl_editwin_set_xy_by_index(e, x); |
---|
| 700 | break; |
---|
| 701 | } |
---|
| 702 | } |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | /* find the last non-space */ |
---|
| 706 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 707 | for (x=i; x>=e->lock; x--) { |
---|
| 708 | if (e->buff[x-1]==' ' || e->buff[x-1]=='\n') { |
---|
| 709 | _owl_editwin_set_xy_by_index(e, x); |
---|
| 710 | break; |
---|
| 711 | } |
---|
| 712 | } |
---|
| 713 | _owl_editwin_set_xy_by_index(e, x); |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | |
---|
[c9334b1] | 717 | void owl_editwin_delete_nextword(owl_editwin *e) |
---|
| 718 | { |
---|
[7d4fbcd] | 719 | int z; |
---|
| 720 | |
---|
| 721 | if (e->bufflen==0) return; |
---|
| 722 | |
---|
| 723 | /* if we start out on a space character then gobble all the spaces |
---|
| 724 | up first */ |
---|
| 725 | while (1) { |
---|
| 726 | z=_owl_editwin_get_index_from_xy(e); |
---|
| 727 | if (e->buff[z]==' ' || e->buff[z]=='\n') { |
---|
| 728 | owl_editwin_delete_char(e); |
---|
| 729 | } else { |
---|
| 730 | break; |
---|
| 731 | } |
---|
| 732 | } |
---|
| 733 | |
---|
| 734 | /* then nuke the next word */ |
---|
| 735 | while (1) { |
---|
| 736 | z=_owl_editwin_get_index_from_xy(e); |
---|
[dab82f29] | 737 | /* z == e->bufflen check added to prevent a hang I (nelhage) have |
---|
| 738 | seen repeatedly while using owl. I'm not sure precisely what |
---|
| 739 | conditions lead to it. */ |
---|
| 740 | if (z == e->bufflen |
---|
| 741 | || e->buff[z+1]==' ' || e->buff[z+1]=='\n' || e->buff[z+1]=='\0') break; |
---|
[7d4fbcd] | 742 | owl_editwin_delete_char(e); |
---|
| 743 | } |
---|
| 744 | owl_editwin_delete_char(e); |
---|
| 745 | } |
---|
| 746 | |
---|
[c9334b1] | 747 | void owl_editwin_delete_previousword(owl_editwin *e) |
---|
| 748 | { |
---|
[b68f9cd] | 749 | /* go backwards to the last non-space character, then delete chars */ |
---|
| 750 | int i, startpos, endpos; |
---|
| 751 | |
---|
| 752 | startpos = _owl_editwin_get_index_from_xy(e); |
---|
| 753 | owl_editwin_move_to_previousword(e); |
---|
| 754 | endpos = _owl_editwin_get_index_from_xy(e); |
---|
| 755 | for (i=0; i<startpos-endpos; i++) { |
---|
| 756 | owl_editwin_delete_char(e); |
---|
| 757 | } |
---|
| 758 | } |
---|
| 759 | |
---|
[c9334b1] | 760 | void owl_editwin_delete_to_endofline(owl_editwin *e) |
---|
| 761 | { |
---|
[7d4fbcd] | 762 | int i; |
---|
| 763 | |
---|
| 764 | if (owl_editwin_get_numchars_on_line(e, e->buffy)>e->buffx) { |
---|
| 765 | /* normal line */ |
---|
| 766 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 767 | while(i < e->bufflen) { |
---|
| 768 | if (e->buff[i]!='\n') { |
---|
| 769 | owl_editwin_delete_char(e); |
---|
| 770 | } else if ((e->buff[i]=='\n') && (i==e->bufflen-1)) { |
---|
| 771 | owl_editwin_delete_char(e); |
---|
| 772 | } else { |
---|
| 773 | return; |
---|
| 774 | } |
---|
| 775 | } |
---|
| 776 | } else if (e->buffy+1 < owl_editwin_get_numlines(e)) { |
---|
| 777 | /* line with cursor at the end but not on very last line */ |
---|
| 778 | owl_editwin_key_right(e); |
---|
| 779 | owl_editwin_backspace(e); |
---|
| 780 | } |
---|
| 781 | } |
---|
| 782 | |
---|
[c9334b1] | 783 | void owl_editwin_move_to_line_end(owl_editwin *e) |
---|
| 784 | { |
---|
[7d4fbcd] | 785 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 786 | } |
---|
| 787 | |
---|
[c9334b1] | 788 | void owl_editwin_move_to_line_start(owl_editwin *e) |
---|
| 789 | { |
---|
[7d4fbcd] | 790 | e->buffx=0; |
---|
| 791 | owl_editwin_adjust_for_locktext(e); |
---|
| 792 | } |
---|
| 793 | |
---|
[c9334b1] | 794 | void owl_editwin_move_to_end(owl_editwin *e) |
---|
| 795 | { |
---|
[7d4fbcd] | 796 | /* go to last char */ |
---|
| 797 | e->buffy=owl_editwin_get_numlines(e)-1; |
---|
| 798 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
| 799 | owl_editwin_key_right(e); |
---|
| 800 | |
---|
| 801 | /* do we need to scroll? */ |
---|
[12c35df] | 802 | /* |
---|
[7d4fbcd] | 803 | if (e->buffy-e->topline > e->winlines) { |
---|
| 804 | e->topline+=e->winlines/2; |
---|
| 805 | } |
---|
[12c35df] | 806 | */ |
---|
| 807 | owl_editwin_recenter(e); |
---|
[7d4fbcd] | 808 | } |
---|
| 809 | |
---|
[c9334b1] | 810 | void owl_editwin_move_to_top(owl_editwin *e) |
---|
| 811 | { |
---|
[7d4fbcd] | 812 | _owl_editwin_set_xy_by_index(e, 0); |
---|
| 813 | |
---|
| 814 | /* do we need to scroll? */ |
---|
| 815 | e->topline=0; |
---|
| 816 | |
---|
| 817 | owl_editwin_adjust_for_locktext(e); |
---|
| 818 | } |
---|
| 819 | |
---|
[c9334b1] | 820 | void owl_editwin_fill_paragraph(owl_editwin *e) |
---|
| 821 | { |
---|
[7d4fbcd] | 822 | int i, save; |
---|
| 823 | |
---|
| 824 | /* save our starting point */ |
---|
| 825 | save=_owl_editwin_get_index_from_xy(e); |
---|
| 826 | |
---|
| 827 | /* scan back to the beginning of this paragraph */ |
---|
| 828 | for (i=save; i>=e->lock; i--) { |
---|
| 829 | if ( (i<=e->lock) || |
---|
| 830 | ((e->buff[i]=='\n') && (e->buff[i-1]=='\n'))) { |
---|
| 831 | _owl_editwin_set_xy_by_index(e, i+1); |
---|
| 832 | break; |
---|
| 833 | } |
---|
| 834 | } |
---|
| 835 | |
---|
| 836 | /* main loop */ |
---|
| 837 | while (1) { |
---|
| 838 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 839 | |
---|
| 840 | /* bail if we hit the end of the buffer */ |
---|
| 841 | if (i>=e->bufflen) break; |
---|
| 842 | |
---|
| 843 | /* bail if we hit the end of the paragraph */ |
---|
| 844 | if (e->buff[i]=='\n' && e->buff[i+1]=='\n') break; |
---|
| 845 | |
---|
| 846 | /* if we've travelled too far, linewrap */ |
---|
| 847 | if ((e->buffx) >= e->fillcol) { |
---|
| 848 | _owl_editwin_linewrap_word(e); |
---|
| 849 | } |
---|
| 850 | |
---|
| 851 | /* did we hit the end of a line too soon? */ |
---|
| 852 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 853 | if (e->buff[i]=='\n' && e->buffx<e->fillcol-1) { |
---|
| 854 | /* ********* we need to make sure we don't pull in a word that's too long ***********/ |
---|
| 855 | e->buff[i]=' '; |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | /* fix spacing */ |
---|
| 859 | i=_owl_editwin_get_index_from_xy(e); |
---|
| 860 | if (e->buff[i]==' ' && e->buff[i+1]==' ') { |
---|
| 861 | if (e->buff[i-1]=='.' || e->buff[i-1]=='!' || e->buff[i-1]=='?') { |
---|
| 862 | owl_editwin_key_right(e); |
---|
| 863 | } else { |
---|
| 864 | owl_editwin_delete_char(e); |
---|
| 865 | /* if we did this ahead of the save point, adjust it */ |
---|
| 866 | if (i<save) save--; |
---|
| 867 | } |
---|
| 868 | } else { |
---|
| 869 | owl_editwin_key_right(e); |
---|
| 870 | } |
---|
| 871 | |
---|
| 872 | } |
---|
| 873 | |
---|
| 874 | /* put cursor back at starting point */ |
---|
| 875 | _owl_editwin_set_xy_by_index(e, save); |
---|
| 876 | |
---|
| 877 | /* do we need to scroll? */ |
---|
| 878 | if (e->buffy-e->topline < 0) { |
---|
| 879 | e->topline-=e->winlines/2; |
---|
| 880 | } |
---|
| 881 | } |
---|
| 882 | |
---|
[cf83b7a] | 883 | /* returns true if only whitespace remains */ |
---|
[c9334b1] | 884 | int owl_editwin_is_at_end(owl_editwin *e) |
---|
| 885 | { |
---|
[10b866d] | 886 | int cur=_owl_editwin_get_index_from_xy(e); |
---|
[c9334b1] | 887 | return (only_whitespace(e->buff+cur)); |
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[217a43e] | 888 | } |
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| 889 | |
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[c9334b1] | 890 | int owl_editwin_check_dotsend(owl_editwin *e) |
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| 891 | { |
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[7d4fbcd] | 892 | int i; |
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| 893 | |
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| 894 | if (!e->dotsend) return(0); |
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| 895 | for (i=e->bufflen-1; i>0; i--) { |
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| 896 | if (e->buff[i] == '.' |
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| 897 | && (e->buff[i-1] == '\n' || e->buff[i-1] == '\r') |
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| 898 | && (e->buff[i+1] == '\n' || e->buff[i+1] == '\r')) { |
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| 899 | e->bufflen = i; |
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| 900 | e->buff[i] = '\0'; |
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| 901 | return(1); |
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| 902 | } |
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[601a9e0] | 903 | if (!isspace((int) e->buff[i])) { |
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[7d4fbcd] | 904 | return(0); |
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| 905 | } |
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| 906 | } |
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| 907 | return(0); |
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| 908 | } |
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| 909 | |
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[c9334b1] | 910 | void owl_editwin_post_process_char(owl_editwin *e, int j) |
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| 911 | { |
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[7d4fbcd] | 912 | /* check if we need to scroll down */ |
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| 913 | if (e->buffy-e->topline >= e->winlines) { |
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| 914 | e->topline+=e->winlines/2; |
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| 915 | } |
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| 916 | if ((j==13 || j==10) && owl_editwin_check_dotsend(e)) { |
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| 917 | owl_command_editmulti_done(e); |
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| 918 | return; |
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| 919 | } |
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| 920 | owl_editwin_redisplay(e, 0); |
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| 921 | } |
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| 922 | |
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[c9334b1] | 923 | void owl_editwin_process_char(owl_editwin *e, int j) |
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| 924 | { |
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[7d4fbcd] | 925 | if (j == ERR) return; |
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| 926 | if (j>127 || ((j<32) && (j!=10) && (j!=13))) { |
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| 927 | return; |
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| 928 | } else { |
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| 929 | owl_editwin_insert_char(e, j); |
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| 930 | } |
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| 931 | } |
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| 932 | |
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[c9334b1] | 933 | char *owl_editwin_get_text(owl_editwin *e) |
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| 934 | { |
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[7d4fbcd] | 935 | return(e->buff+e->lock); |
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| 936 | } |
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| 937 | |
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[c9334b1] | 938 | int owl_editwin_get_numchars_on_line(owl_editwin *e, int line) |
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| 939 | { |
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[7d4fbcd] | 940 | int i; |
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| 941 | char *ptr1, *ptr2; |
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| 942 | |
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| 943 | if (e->bufflen==0) return(0); |
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| 944 | |
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| 945 | /* first go to the yth line */ |
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| 946 | ptr1=e->buff; |
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| 947 | for (i=0; i<line; i++) { |
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| 948 | ptr2=strchr(ptr1, '\n'); |
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| 949 | if (!ptr2) { |
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| 950 | /* we're already on the last line */ |
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| 951 | return(0); |
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| 952 | } |
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| 953 | ptr1=ptr2+1; |
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| 954 | } |
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| 955 | |
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| 956 | /* now go to the xth character */ |
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| 957 | ptr2=strchr(ptr1, '\n'); |
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| 958 | if (!ptr2) { |
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| 959 | return(e->buff + e->bufflen - ptr1); |
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| 960 | } |
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| 961 | return(ptr2-ptr1); /* don't count the newline for now */ |
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| 962 | } |
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| 963 | |
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[c9334b1] | 964 | int owl_editwin_get_numlines(owl_editwin *e) |
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| 965 | { |
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[7d4fbcd] | 966 | return(owl_text_num_lines(e->buff)); |
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| 967 | } |
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| 968 | |
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