1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2013,2016 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 32 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 33 * and: Sven Verdoolaege * 34 * and: Thomas E. Dickey * 35 ****************************************************************************/ 36 37 /* 38 ** lib_insch.c 39 ** 40 ** The routine winsch(). 41 ** 42 */ 43 44 #include <curses.priv.h> 45 #include <ctype.h> 46 47 MODULE_ID("$Id: lib_insch.c,v 1.37 2020/02/02 23:34:34 tom Exp $") 48 49 /* 50 * Insert the given character, updating the current location to simplify 51 * inserting a string. 52 */ 53 NCURSES_EXPORT(int) 54 _nc_insert_ch(SCREEN *sp, WINDOW *win, chtype ch) 55 { 56 int code = OK; 57 int ch8 = (int) ChCharOf(ch); 58 NCURSES_CH_T wch; 59 int count; 60 int tabsize = ( 61 #if USE_REENTRANT 62 sp->_TABSIZE 63 #else 64 TABSIZE 65 #endif 66 ); 67 68 switch (ch) { 69 case '\t': 70 for (count = (tabsize - (win->_curx % tabsize)); count > 0; count--) { 71 if ((code = _nc_insert_ch(sp, win, ' ')) != OK) 72 break; 73 } 74 break; 75 case '\n': 76 case '\r': 77 case '\b': 78 SetChar2(wch, ch); 79 _nc_waddch_nosync(win, wch); 80 break; 81 default: 82 if ( 83 #if USE_WIDEC_SUPPORT 84 WINDOW_EXT(win, addch_used) == 0 && 85 #endif 86 (isprint(ch8) || 87 (ChAttrOf(ch) & A_ALTCHARSET) || 88 (sp != 0 && sp->_legacy_coding && !iscntrl(ch8)))) { 89 if (win->_curx <= win->_maxx) { 90 struct ldat *line = &(win->_line[win->_cury]); 91 NCURSES_CH_T *end = &(line->text[win->_curx]); 92 NCURSES_CH_T *temp1 = &(line->text[win->_maxx]); 93 NCURSES_CH_T *temp2 = temp1 - 1; 94 95 SetChar2(wch, ch); 96 97 CHANGED_TO_EOL(line, win->_curx, win->_maxx); 98 while (temp1 > end) 99 *temp1-- = *temp2--; 100 101 *temp1 = _nc_render(win, wch); 102 win->_curx++; 103 } 104 } else if (iscntrl(ch8)) { 105 NCURSES_CONST char *s; 106 s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8); 107 while (*s != '\0') { 108 code = _nc_insert_ch(sp, win, ChAttrOf(ch) | UChar(*s)); 109 if (code != OK) 110 break; 111 ++s; 112 } 113 } 114 #if USE_WIDEC_SUPPORT 115 else { 116 /* 117 * Handle multibyte characters here 118 */ 119 SetChar2(wch, ch); 120 wch = _nc_render(win, wch); 121 count = _nc_build_wch(win, &wch); 122 if (count > 0) { 123 code = _nc_insert_wch(win, &wch); 124 } else if (count == -1) { 125 NCURSES_CONST char *s; 126 /* handle EILSEQ */ 127 s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8); 128 if (strlen(s) > 1) { 129 while (*s != '\0') { 130 code = _nc_insert_ch(sp, win, 131 ChAttrOf(ch) | UChar(*s)); 132 if (code != OK) 133 break; 134 ++s; 135 } 136 } else { 137 code = ERR; 138 } 139 } 140 } 141 #endif 142 break; 143 } 144 return code; 145 } 146 147 NCURSES_EXPORT(int) 148 winsch(WINDOW *win, chtype c) 149 { 150 int code = ERR; 151 152 T((T_CALLED("winsch(%p, %s)"), (void *) win, _tracechtype(c))); 153 154 if (win != 0) { 155 NCURSES_SIZE_T oy = win->_cury; 156 NCURSES_SIZE_T ox = win->_curx; 157 158 code = _nc_insert_ch(_nc_screen_of(win), win, c); 159 160 win->_curx = ox; 161 win->_cury = oy; 162 _nc_synchook(win); 163 } 164 returnCode(code); 165 } 166