| 1 | // * this is for making emacs happy: -*-Mode: C++;-*-
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| 2 |
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| 3 | /*
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| 4 | Copyright (C) 1989 Free Software Foundation
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| 5 | written by Eric Newton ([email protected])
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| 6 |
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| 7 | This file is part of the GNU C++ Library. This library is free
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| 8 | software; you can redistribute it and/or modify it under the terms of
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| 9 | the GNU Library General Public License as published by the Free
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| 10 | Software Foundation; either version 2 of the License, or (at your
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| 11 | option) any later version. This library is distributed in the hope
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| 12 | that it will be useful, but WITHOUT ANY WARRANTY; without even the
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| 13 | implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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| 14 | PURPOSE. See the GNU Library General Public License for more details.
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| 15 | You should have received a copy of the GNU Library General Public
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| 16 | License along with this library; if not, write to the Free Software
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| 17 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 |
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| 19 | modified by Ulrich Drepper ([email protected])
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| 20 | and Anatoly Ivasyuk ([email protected])
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| 21 |
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| 22 | modified by Juergen Pfeifer
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| 23 | and Thomas Dickey (noting that more than 70% of this file has been changed)
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| 24 | */
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| 25 |
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| 26 | #include "internal.h"
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| 27 | #include "cursesw.h"
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| 28 |
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| 29 | MODULE_ID("$Id: cursesw.cc,v 1.32 2005/08/13 18:12:17 tom Exp $")
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| 30 |
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| 31 | #define COLORS_NEED_INITIALIZATION -1
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| 32 | #define COLORS_NOT_INITIALIZED 0
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| 33 | #define COLORS_MONOCHROME 1
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| 34 | #define COLORS_ARE_REALLY_THERE 2
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| 35 |
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| 36 | // declare static variables for the class
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| 37 | long NCursesWindow::count = 0L;
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| 38 | bool NCursesWindow::b_initialized = FALSE;
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| 39 |
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| 40 | /*
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| 41 | * The ncurses library has a fallback for vsscanf(), which may work...
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| 42 | */
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| 43 | #if !(USE_STRSTREAM_VSCAN || USE_STRSTREAM_VSCAN_CAST)
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| 44 | # undef USE_STDIO_VSCAN
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| 45 | # define USE_STDIO_VSCAN 1
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| 46 | #endif
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| 47 |
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| 48 | #if defined(__GNUG__)
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| 49 | # ifndef _IO_va_list
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| 50 | # define _IO_va_list char *
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| 51 | # endif
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| 52 | #endif
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| 53 |
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| 54 | int
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| 55 | NCursesWindow::scanw(const char* fmt, ...)
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| 56 | {
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| 57 | int result = ERR;
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| 58 | char buf[BUFSIZ];
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| 59 |
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| 60 | if (::wgetnstr(w, buf, sizeof(buf)) != ERR) {
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| 61 | va_list args;
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| 62 | va_start(args, fmt);
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| 63 | #if USE_STDIO_VSCAN
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| 64 | if (::vsscanf(buf, fmt, args) != -1)
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| 65 | result = OK;
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| 66 | #elif USE_STRSTREAM_VSCAN /* powerpc, os390 */
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| 67 | strstreambuf ss(buf, sizeof(buf));
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| 68 | if (ss.vscan(fmt, args) != -1)
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| 69 | result = OK;
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| 70 | #elif USE_STRSTREAM_VSCAN_CAST /* pre-gcc 3.0 */
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| 71 | strstreambuf ss(buf, sizeof(buf));
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| 72 | if (ss.vscan(fmt, (_IO_va_list)args) != -1)
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| 73 | result = OK;
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| 74 | #endif
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| 75 | va_end(args);
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| 76 | }
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| 77 | return result;
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| 78 | }
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| 79 |
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| 80 |
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| 81 | int
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| 82 | NCursesWindow::scanw(int y, int x, const char* fmt, ...)
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| 83 | {
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| 84 | int result = ERR;
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| 85 | char buf[BUFSIZ];
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| 86 |
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| 87 | if (::wmove(w, y, x) != ERR) {
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| 88 | if (::wgetnstr(w, buf, sizeof(buf)) != ERR) {
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| 89 | va_list args;
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| 90 | va_start(args, fmt);
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| 91 | #if USE_STDIO_VSCAN
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| 92 | if (::vsscanf(buf, fmt, args) != -1)
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| 93 | result = OK;
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| 94 | #elif USE_STRSTREAM_VSCAN /* powerpc, os390 */
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| 95 | strstreambuf ss(buf, sizeof(buf));
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| 96 | if (ss.vscan(fmt, args) != -1)
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| 97 | result = OK;
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| 98 | #elif USE_STRSTREAM_VSCAN_CAST /* pre-gcc 3.0 */
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| 99 | strstreambuf ss(buf, sizeof(buf));
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| 100 | if (ss.vscan(fmt, (_IO_va_list)args) != -1)
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| 101 | result = OK;
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| 102 | #endif
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| 103 | va_end(args);
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| 104 | }
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| 105 | }
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| 106 | return result;
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| 107 | }
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| 108 |
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| 109 |
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| 110 | int
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| 111 | NCursesWindow::printw(const char * fmt, ...)
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| 112 | {
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| 113 | va_list args;
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| 114 | va_start(args, fmt);
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| 115 | char buf[BUFSIZ];
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| 116 | ::vsprintf(buf, fmt, args);
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| 117 | va_end(args);
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| 118 | return waddstr(w, buf);
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| 119 | }
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| 120 |
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| 121 |
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| 122 | int
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| 123 | NCursesWindow::printw(int y, int x, const char * fmt, ...)
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| 124 | {
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| 125 | va_list args;
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| 126 | va_start(args, fmt);
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| 127 | int result = ::wmove(w, y, x);
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| 128 | if (result == OK) {
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| 129 | char buf[BUFSIZ];
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| 130 | ::vsprintf(buf, fmt, args);
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| 131 | result = waddstr(w, buf);
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| 132 | }
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| 133 | va_end(args);
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| 134 | return result;
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| 135 | }
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| 136 |
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| 137 |
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| 138 | void
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| 139 | NCursesWindow::init(void)
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| 140 | {
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| 141 | leaveok(0);
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| 142 | keypad(1);
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| 143 | meta(1);
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| 144 | }
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| 145 |
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| 146 | void
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| 147 | NCursesWindow::err_handler(const char *msg) const THROWS(NCursesException)
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| 148 | {
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| 149 | THROW(new NCursesException(msg));
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| 150 | }
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| 151 |
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| 152 | void
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| 153 | NCursesWindow::initialize()
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| 154 | {
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| 155 | if (!b_initialized) {
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| 156 | ::initscr();
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| 157 | b_initialized = TRUE;
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| 158 | if (colorInitialized==COLORS_NEED_INITIALIZATION) {
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| 159 | colorInitialized=COLORS_NOT_INITIALIZED;
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| 160 | useColors();
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| 161 | }
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| 162 | ::noecho();
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| 163 | ::cbreak();
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| 164 | }
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| 165 | }
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| 166 |
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| 167 | NCursesWindow::NCursesWindow()
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| 168 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 169 | {
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| 170 | initialize();
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| 171 |
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| 172 | w = static_cast<WINDOW *>(0);
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| 173 | init();
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| 174 | alloced = FALSE;
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| 175 | subwins = par = sib = 0;
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| 176 | count++;
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| 177 | }
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| 178 |
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| 179 | NCursesWindow::NCursesWindow(int nlines, int ncols, int begin_y, int begin_x)
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| 180 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 181 | {
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| 182 | initialize();
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| 183 |
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| 184 | w = ::newwin(nlines, ncols, begin_y, begin_x);
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| 185 | if (w == 0) {
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| 186 | err_handler("Cannot construct window");
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| 187 | }
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| 188 | init();
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| 189 |
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| 190 | alloced = TRUE;
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| 191 | subwins = par = sib = 0;
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| 192 | count++;
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| 193 | }
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| 194 |
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| 195 | NCursesWindow::NCursesWindow(WINDOW* &window)
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| 196 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 197 | {
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| 198 | initialize();
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| 199 |
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| 200 | w = window;
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| 201 | init();
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| 202 | alloced = FALSE;
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| 203 | subwins = par = sib = 0;
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| 204 | count++;
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| 205 | }
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| 206 |
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| 207 | NCursesWindow::NCursesWindow(NCursesWindow& win, int l, int c,
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| 208 | int begin_y, int begin_x, char absrel)
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| 209 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 210 | {
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| 211 | initialize();
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| 212 | if (absrel == 'a') { // absolute origin
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| 213 | begin_y -= win.begy();
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| 214 | begin_x -= win.begx();
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| 215 | }
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| 216 |
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| 217 | // Even though we treat subwindows as a tree, the standard curses
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| 218 | // library needs the `subwin' call to link to the parent in
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| 219 | // order to correctly perform refreshes, etc.
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| 220 | // Friendly enough, this also works for pads.
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| 221 | w = ::derwin(win.w, l, c, begin_y, begin_x);
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| 222 | if (w == 0) {
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| 223 | err_handler("Cannot construct subwindow");
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| 224 | }
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| 225 |
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| 226 | par = &win;
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| 227 | sib = win.subwins;
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| 228 | win.subwins = this;
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| 229 | subwins = 0;
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| 230 | alloced = TRUE;
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| 231 | count++;
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| 232 | }
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| 233 |
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| 234 | NCursesWindow::NCursesWindow(NCursesWindow& win,
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| 235 | bool do_box NCURSES_PARAM_INIT(TRUE))
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| 236 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 237 | {
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| 238 | initialize();
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| 239 | int myHeight = win.height();
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| 240 | int myWidth = win.width();
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| 241 | w = :: derwin(win.w, myHeight - 2, myWidth - 2, 1, 1);
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| 242 | if (w == 0) {
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| 243 | err_handler("Cannot construct subwindow");
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| 244 | }
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| 245 |
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| 246 | par = &win;
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| 247 | sib = win.subwins;
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| 248 | win.subwins = this;
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| 249 | subwins = 0;
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| 250 | alloced = TRUE;
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| 251 | count++;
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| 252 |
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| 253 | if (do_box) {
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| 254 | win.box();
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| 255 | win.touchwin();
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| 256 | }
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| 257 | }
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| 258 |
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| 259 | NCursesWindow NCursesWindow::Clone()
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| 260 | {
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| 261 | WINDOW *d = ::dupwin(w);
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| 262 | NCursesWindow W(d);
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| 263 | W.subwins = subwins;
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| 264 | W.sib = sib;
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| 265 | W.par = par;
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| 266 | W.alloced = alloced;
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| 267 | return W;
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| 268 | }
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| 269 |
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| 270 | typedef int (*RIPOFFINIT)(NCursesWindow&);
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| 271 | static RIPOFFINIT R_INIT[5]; // There can't be more
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| 272 | static int r_init_idx = 0;
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| 273 | static RIPOFFINIT* prip = R_INIT;
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| 274 |
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| 275 | NCursesWindow::NCursesWindow(WINDOW *win, int ncols)
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| 276 | : w(0), alloced(0), par(0), subwins(0), sib(0)
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| 277 | {
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| 278 | initialize();
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| 279 | w = win;
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| 280 | assert((w->_maxx+1)==ncols);
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| 281 | alloced = FALSE;
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| 282 | subwins = par = sib = 0;
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| 283 | }
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| 284 |
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| 285 | int _nc_xx_ripoff_init(WINDOW *w, int ncols)
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| 286 | {
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| 287 | int res = ERR;
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| 288 |
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| 289 | RIPOFFINIT init = *prip++;
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| 290 | if (init) {
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| 291 | NCursesWindow* W = new NCursesWindow(w,ncols);
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| 292 | res = init(*W);
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| 293 | }
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| 294 | return res;
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| 295 | }
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| 296 |
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| 297 | int NCursesWindow::ripoffline(int ripoff_lines,
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| 298 | int (*init)(NCursesWindow& win))
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| 299 | {
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| 300 | int code = ::_nc_ripoffline(ripoff_lines,_nc_xx_ripoff_init);
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| 301 | if (code==OK && init && ripoff_lines) {
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| 302 | R_INIT[r_init_idx++] = init;
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| 303 | }
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| 304 | return code;
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| 305 | }
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| 306 |
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| 307 | bool
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| 308 | NCursesWindow::isDescendant(NCursesWindow& win)
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| 309 | {
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| 310 | for (NCursesWindow* p = subwins; p != NULL; p = p->sib) {
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| 311 | if (p==&win)
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| 312 | return TRUE;
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| 313 | else {
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| 314 | if (p->isDescendant(win))
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| 315 | return TRUE;
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| 316 | }
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| 317 | }
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| 318 | return FALSE;
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| 319 | }
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| 320 |
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| 321 | void
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| 322 | NCursesWindow::kill_subwindows()
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| 323 | {
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| 324 | for (NCursesWindow* p = subwins; p != 0; p = p->sib) {
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| 325 | p->kill_subwindows();
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| 326 | if (p->alloced) {
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| 327 | if (p->w != 0)
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| 328 | ::delwin(p->w);
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| 329 | p->alloced = FALSE;
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| 330 | }
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| 331 | p->w = 0; // cause a run-time error if anyone attempts to use...
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| 332 | }
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| 333 | }
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| 334 |
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| 335 |
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| 336 | NCursesWindow::~NCursesWindow()
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| 337 | {
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| 338 | kill_subwindows();
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| 339 |
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| 340 | if (par != 0) { // Snip us from the parent's list of subwindows.
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| 341 | NCursesWindow * win = par->subwins;
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| 342 | NCursesWindow * trail = 0;
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| 343 | for (;;) {
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| 344 | if (win == 0)
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| 345 | break;
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| 346 | else if (win == this) {
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| 347 | if (trail != 0)
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| 348 | trail->sib = win->sib;
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| 349 | else
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| 350 | par->subwins = win->sib;
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| 351 | break;
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| 352 | } else {
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| 353 | trail = win;
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| 354 | win = win->sib;
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| 355 | }
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| 356 | }
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| 357 | }
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| 358 |
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| 359 | if (alloced && w != 0)
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| 360 | ::delwin(w);
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| 361 |
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| 362 | if (alloced) {
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| 363 | --count;
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| 364 | if (count == 0) {
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| 365 | ::endwin();
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| 366 | }
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| 367 | else if (count < 0) { // cannot happen!
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| 368 | err_handler("Too many windows destroyed");
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| 369 | }
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| 370 | }
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| 371 | }
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| 372 |
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| 373 | // ---------------------------------------------------------------------
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| 374 | // Color stuff
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| 375 | //
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| 376 | int NCursesWindow::colorInitialized = COLORS_NOT_INITIALIZED;
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| 377 |
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| 378 | void
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| 379 | NCursesWindow::useColors(void)
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| 380 | {
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| 381 | if (colorInitialized == COLORS_NOT_INITIALIZED) {
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| 382 | if (b_initialized) {
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| 383 | if (::has_colors()) {
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| 384 | ::start_color();
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| 385 | colorInitialized = COLORS_ARE_REALLY_THERE;
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| 386 | }
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| 387 | else
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| 388 | colorInitialized = COLORS_MONOCHROME;
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| 389 | }
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| 390 | else
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| 391 | colorInitialized = COLORS_NEED_INITIALIZATION;
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| 392 | }
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| 393 | }
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| 394 |
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| 395 | short
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| 396 | NCursesWindow::getcolor(int getback) const
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| 397 | {
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| 398 | short fore, back;
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| 399 |
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| 400 | if (colorInitialized==COLORS_ARE_REALLY_THERE) {
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| 401 | if (::pair_content(static_cast<short>(PAIR_NUMBER(w->_attrs)), &fore, &back))
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| 402 | err_handler("Can't get color pair");
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| 403 | }
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| 404 | else {
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| 405 | // Monochrome means white on black
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| 406 | back = COLOR_BLACK;
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| 407 | fore = COLOR_WHITE;
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| 408 | }
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| 409 | return getback ? back : fore;
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| 410 | }
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| 411 |
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| 412 | int NCursesWindow::NumberOfColors()
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| 413 | {
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| 414 | if (colorInitialized==COLORS_ARE_REALLY_THERE)
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| 415 | return COLORS;
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| 416 | else
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| 417 | return 1; // monochrome (actually there are two ;-)
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| 418 | }
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| 419 |
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| 420 | short
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| 421 | NCursesWindow::getcolor() const
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| 422 | {
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| 423 | if (colorInitialized==COLORS_ARE_REALLY_THERE)
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| 424 | return PAIR_NUMBER(w->_attrs);
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| 425 | else
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| 426 | return 0; // we only have pair zero
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| 427 | }
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| 428 |
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| 429 | int
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| 430 | NCursesWindow::setpalette(short fore, short back, short pair)
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| 431 | {
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| 432 | if (colorInitialized==COLORS_ARE_REALLY_THERE)
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| 433 | return ::init_pair(pair, fore, back);
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| 434 | else
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| 435 | return OK;
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| 436 | }
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| 437 |
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| 438 | int
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| 439 | NCursesWindow::setpalette(short fore, short back)
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| 440 | {
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| 441 | if (colorInitialized==COLORS_ARE_REALLY_THERE)
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| 442 | return setpalette(fore, back, static_cast<short>(PAIR_NUMBER(w->_attrs)));
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| 443 | else
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| 444 | return OK;
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| 445 | }
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| 446 |
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| 447 |
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| 448 | int
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| 449 | NCursesWindow::setcolor(short pair)
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| 450 | {
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| 451 | if (colorInitialized==COLORS_ARE_REALLY_THERE) {
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| 452 | if ((pair < 1) || (pair > COLOR_PAIRS))
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| 453 | err_handler("Can't set color pair");
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| 454 |
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| 455 | attroff(A_COLOR);
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| 456 | attrset(COLOR_PAIR(pair));
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| 457 | }
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| 458 | return OK;
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| 459 | }
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| 460 |
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| 461 | #if HAVE_HAS_KEY
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| 462 | bool NCursesWindow::has_mouse() const
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| 463 | {
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| 464 | return ((::has_key(KEY_MOUSE) || ::_nc_has_mouse())
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| 465 | ? TRUE : FALSE);
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| 466 | }
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| 467 | #endif
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