1 /**************************************************************************** 2 * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Sven Verdoolaege * 33 * and: Thomas E. Dickey * 34 ****************************************************************************/ 35 36 /* 37 ** lib_insch.c 38 ** 39 ** The routine winsch(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 #include <ctype.h> 45 46 MODULE_ID("$Id: lib_insch.c,v 1.35 2013/05/18 21:58:56 tom Exp $") 47 48 /* 49 * Insert the given character, updating the current location to simplify 50 * inserting a string. 51 */ 52 NCURSES_EXPORT(int) 53 _nc_insert_ch(SCREEN *sp, WINDOW *win, chtype ch) 54 { 55 int code = OK; 56 int ch8 = (int) ChCharOf(ch); 57 NCURSES_CH_T wch; 58 int count; 59 NCURSES_CONST char *s; 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 s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8); 106 while (*s != '\0') { 107 code = _nc_insert_ch(sp, win, ChAttrOf(ch) | UChar(*s)); 108 if (code != OK) 109 break; 110 ++s; 111 } 112 } 113 #if USE_WIDEC_SUPPORT 114 else { 115 /* 116 * Handle multibyte characters here 117 */ 118 SetChar2(wch, ch); 119 wch = _nc_render(win, wch); 120 count = _nc_build_wch(win, &wch); 121 if (count > 0) { 122 code = _nc_insert_wch(win, &wch); 123 } else if (count == -1) { 124 /* handle EILSEQ */ 125 s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8); 126 if (strlen(s) > 1) { 127 while (*s != '\0') { 128 code = _nc_insert_ch(sp, win, 129 ChAttrOf(ch) | UChar(*s)); 130 if (code != OK) 131 break; 132 ++s; 133 } 134 } else { 135 code = ERR; 136 } 137 } 138 } 139 #endif 140 break; 141 } 142 return code; 143 } 144 145 NCURSES_EXPORT(int) 146 winsch(WINDOW *win, chtype c) 147 { 148 NCURSES_SIZE_T oy; 149 NCURSES_SIZE_T ox; 150 int code = ERR; 151 152 T((T_CALLED("winsch(%p, %s)"), (void *) win, _tracechtype(c))); 153 154 if (win != 0) { 155 oy = win->_cury; 156 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