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, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* 28 * wins_wch.c 29 * 30 * XCurses Library 31 * 32 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved. 33 * 34 */ 35 36 #ifdef M_RCSID 37 #ifndef lint 38 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wins_wch.c 1.9 1995/09/28 13:18:36 ant Exp $"; 39 #endif 40 #endif 41 42 #include <private.h> 43 44 /* 45 * Insert a character into a window line, shifting the line right 46 * the column width of the inserted character. The right most columns 47 * will be truncated according to the width of the character inserted. 48 */ 49 int 50 __m_cc_ins(w, y, x, cc) 51 WINDOW *w; 52 int y, x; 53 const cchar_t *cc; 54 { 55 extern void *memmove(); /* quiet sparcv9 warning */ 56 int width; 57 58 /* Determine the character width to insert. */ 59 if ((width = __m_cc_width(cc)) <= 0 || w->_maxx < x + width) 60 return -1; 61 62 x = __m_cc_first(w, y, x); 63 64 /* Insert a "hole" into the line. */ 65 (void) memmove( 66 &w->_line[y][x + width], &w->_line[y][x], 67 (w->_maxx - x - width) * sizeof **w->_line 68 ); 69 70 /* Write the character into the hole. */ 71 if (__m_cc_replace(w, y, x, cc, 0) != width) 72 return -1; 73 74 /* Update dirty region markers. */ 75 if (x < w->_first[y]) 76 w->_first[y] = x; 77 w->_last[y] = w->_maxx; 78 79 /* If the last character on the line is incomplete, 80 * blank it out. 81 */ 82 x = __m_cc_first(w, y, w->_maxx-1); 83 if (w->_maxx < x + __m_cc_width(&w->_line[y][x])) 84 (void) __m_cc_erase(w, y, x, y, w->_maxx-1); 85 86 return width; 87 } 88 89 /* 90 * Special internal version of wins_wch() that can track the cursor 91 * position to facilitate inserting strings containing special characters 92 * like \b, \n, \r, and \t. 93 */ 94 int 95 __m_wins_wch(w, y, x, cc, yp, xp) 96 WINDOW *w; 97 int y, x; 98 const cchar_t *cc; 99 int *yp, *xp; 100 { 101 cchar_t uc; 102 const wchar_t *p; 103 int code, nx, width; 104 105 #ifdef M_CURSES_TRACE 106 __m_trace("__m_wins_wch(%p, %d, %d, %p, %p, %p)", w, y, x, cc, yp, xp); 107 #endif 108 109 code = ERR; 110 111 switch (cc->_wc[0]) { 112 case '\r': 113 x = 0; 114 break; 115 case '\b': 116 if (0 < x) 117 --x; 118 break; 119 case '\t': 120 for (nx = x + (8 - (x & 07)); x < nx; x += width) 121 if ((width = __m_cc_ins(w, y, x, &w->_bg)) <= 0) 122 goto error; 123 break; 124 case '\n': 125 /* Truncate the tail of the current line. */ 126 if (__m_cc_erase(w, y, x, y, w->_maxx-1) == -1) 127 goto error; 128 129 if (__m_do_scroll(w, y, x, &y, &x) == ERR) 130 goto error; 131 break; 132 default: 133 if (iswprint(cc->_wc[0])) { 134 if ((width = __m_cc_ins(w, y, x, cc)) <= 0) 135 goto error; 136 x += width; 137 break; 138 } 139 140 /* Convert non-printables into printable representation. */ 141 uc._n = 1; 142 uc._at = cc->_at; 143 uc._co = cc->_co; 144 145 if ((p = wunctrl(cc)) == (wchar_t *) 0) 146 goto error; 147 148 for ( ; *p != '\0'; ++p, x += width) { 149 uc._wc[0] = *p; 150 if ((width = __m_cc_ins(w, y, x, &uc)) < 0) 151 goto error; 152 } 153 } 154 155 if (yp != (int *) 0) 156 *yp = y; 157 if (xp != (int *) 0) 158 *xp = x; 159 160 WSYNC(w); 161 162 code = WFLUSH(w); 163 error: 164 return __m_return_code("wins_wch", code); 165 } 166 167 /*f 168 * Insert a character (with attributes) before the cursor. All 169 * characters to the right of the cursor are moved one space to 170 * the right, with a possibility of the rightmost character on 171 * the line being lost. The cursor position does not change. 172 */ 173 int 174 wins_wch(w, cc) 175 WINDOW *w; 176 const cchar_t *cc; 177 { 178 int code; 179 180 #ifdef M_CURSES_TRACE 181 __m_trace("wins_wch(%p, %p) at (%d, %d)", w, cc, w->_cury, w->_curx); 182 #endif 183 184 code = __m_wins_wch(w, w->_cury, w->_curx, cc, (int *) 0, (int *) 0); 185 186 return __m_return_code("wins_wch", code); 187 } 188 189