1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1995-1998 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* LINTLIBRARY */ 30 31 /* 32 * wins_wch.c 33 * 34 * XCurses Library 35 * 36 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved. 37 * 38 */ 39 40 #ifdef M_RCSID 41 #ifndef lint 42 static char rcsID[] = 43 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/" 44 "libxcurses/src/libc/xcurses/rcs/wins_wch.c 1.3 1998/06/04 17:54:38 " 45 "cbates Exp $"; 46 #endif 47 #endif 48 49 #include <private.h> 50 #include <string.h> 51 52 /* 53 * Insert a character into a window line, shifting the line right 54 * the column width of the inserted character. The right most columns 55 * will be truncated according to the width of the character inserted. 56 */ 57 int 58 __m_cc_ins(WINDOW *w, int y, int x, const cchar_t *cc) 59 { 60 int width; 61 62 /* Determine the character width to insert. */ 63 if ((width = __m_cc_width(cc)) <= 0 || w->_maxx < x + width) 64 return (-1); 65 66 x = __m_cc_first(w, y, x); 67 68 /* 69 * Use erase to remove possible multi-column chars 70 * before memmove clobbers them 71 */ 72 (void) __m_cc_erase(w, y, w->_maxx - width, y, w->_maxx - 1); 73 74 /* Insert a "hole" into the line. */ 75 (void) memmove(&w->_line[y][x + width], &w->_line[y][x], 76 (w->_maxx - x - width) * sizeof (**w->_line)); 77 78 /* Write the character into the hole. */ 79 if (__m_cc_replace(w, y, x, cc, 0) != width) 80 return (-1); 81 82 /* Update dirty region markers. */ 83 if (x < w->_first[y]) 84 w->_first[y] = (short) x; 85 w->_last[y] = w->_maxx; 86 87 /* 88 * If the last character on the line is incomplete, 89 * blank it out. 90 */ 91 x = __m_cc_first(w, y, w->_maxx-1); 92 if (w->_maxx < x + __m_cc_width(&w->_line[y][x])) 93 (void) __m_cc_erase(w, y, x, y, w->_maxx-1); 94 95 return (width); 96 } 97 98 /* 99 * Special internal version of wins_wch() that can track the cursor 100 * position to facilitate inserting strings containing special characters 101 * like \b, \n, \r, and \t. 102 */ 103 int 104 __m_wins_wch(WINDOW *w, int y, int x, const cchar_t *cc, 105 int *yp, int *xp) 106 { 107 cchar_t uc; 108 const wchar_t *p; 109 int code, nx, width; 110 111 code = ERR; 112 113 switch (cc->_wc[0]) { 114 case L'\r': 115 x = 0; 116 break; 117 case L'\b': 118 if (0 < x) 119 --x; 120 break; 121 case L'\t': 122 for (nx = x + (8 - (x & 07)); x < nx; x += width) 123 if ((width = __m_cc_ins(w, y, x, &w->_bg)) <= 0) 124 goto error; 125 break; 126 case L'\n': 127 /* Truncate the tail of the current line. */ 128 if (__m_cc_erase(w, y, x, y, w->_maxx - 1) == -1) 129 goto error; 130 131 if (__m_do_scroll(w, y, x, &y, &x) == ERR) 132 goto error; 133 break; 134 default: 135 if (iswprint(cc->_wc[0])) { 136 if ((width = __m_cc_ins(w, y, x, cc)) <= 0) 137 goto error; 138 x += width; 139 break; 140 } 141 142 /* Convert non-printables into printable representation. */ 143 uc._n = 1; 144 uc._at = cc->_at; 145 uc._co = cc->_co; 146 147 if ((p = wunctrl((cchar_t *)cc)) == NULL) 148 goto error; 149 150 for (; *p != '\0'; ++p, x += width) { 151 uc._wc[0] = *p; 152 if ((width = __m_cc_ins(w, y, x, &uc)) < 0) 153 goto error; 154 } 155 } 156 157 if (yp != NULL) 158 *yp = y; 159 if (xp != NULL) 160 *xp = x; 161 162 WSYNC(w); 163 164 code = WFLUSH(w); 165 error: 166 return (code); 167 } 168 169 /* 170 * Insert a character (with attributes) before the cursor. All 171 * characters to the right of the cursor are moved one space to 172 * the right, with a possibility of the rightmost character on 173 * the line being lost. The cursor position does not change. 174 */ 175 int 176 wins_wch(WINDOW *w, const cchar_t *cc) 177 { 178 int code; 179 180 code = __m_wins_wch(w, w->_cury, w->_curx, cc, NULL, NULL); 181 182 return (code); 183 } 184