1 /**************************************************************************** 2 * Copyright (c) 1998,2000 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 ****************************************************************************/ 33 34 /* 35 ** lib_window.c 36 ** 37 ** 38 */ 39 40 #include <curses.priv.h> 41 42 MODULE_ID("$Id: lib_window.c,v 1.15 2000/12/10 02:43:28 tom Exp $") 43 44 NCURSES_EXPORT(void) 45 _nc_synchook(WINDOW *win) 46 /* hook to be called after each window change */ 47 { 48 if (win->_immed) 49 wrefresh(win); 50 if (win->_sync) 51 wsyncup(win); 52 } 53 54 NCURSES_EXPORT(int) 55 mvderwin(WINDOW *win, int y, int x) 56 /* move a derived window */ 57 { 58 WINDOW *orig; 59 int i; 60 61 T((T_CALLED("mvderwin(%p,%d,%d)"), win, y, x)); 62 63 if (win && (orig = win->_parent)) { 64 if (win->_parx == x && win->_pary == y) 65 returnCode(OK); 66 if (x < 0 || y < 0) 67 returnCode(ERR); 68 if ((x + getmaxx(win) > getmaxx(orig)) || 69 (y + getmaxy(win) > getmaxy(orig))) 70 returnCode(ERR); 71 } else 72 returnCode(ERR); 73 wsyncup(win); 74 win->_parx = x; 75 win->_pary = y; 76 for (i = 0; i < getmaxy(win); i++) 77 win->_line[i].text = &(orig->_line[y++].text[x]); 78 returnCode(OK); 79 } 80 81 NCURSES_EXPORT(int) 82 syncok(WINDOW *win, bool bf) 83 /* enable/disable automatic wsyncup() on each change to window */ 84 { 85 T((T_CALLED("syncok(%p,%d)"), win, bf)); 86 87 if (win) { 88 win->_sync = bf; 89 returnCode(OK); 90 } else 91 returnCode(ERR); 92 } 93 94 NCURSES_EXPORT(void) 95 wsyncup(WINDOW *win) 96 /* mark changed every cell in win's ancestors that is changed in win */ 97 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */ 98 { 99 WINDOW *wp; 100 101 if (win && win->_parent) 102 for (wp = win; wp->_parent; wp = wp->_parent) { 103 int y; 104 WINDOW *pp = wp->_parent; 105 106 assert((wp->_pary <= pp->_maxy) && 107 ((wp->_pary + wp->_maxy) <= pp->_maxy)); 108 109 for (y = 0; y <= wp->_maxy; y++) { 110 int left = wp->_line[y].firstchar; 111 if (left >= 0) { /* line is touched */ 112 struct ldat *line = &(pp->_line[wp->_pary + y]); 113 /* left & right character in parent window coordinates */ 114 int right = wp->_line[y].lastchar + wp->_parx; 115 left += wp->_parx; 116 117 CHANGED_RANGE(line, left, right); 118 } 119 } 120 } 121 } 122 123 NCURSES_EXPORT(void) 124 wsyncdown(WINDOW *win) 125 /* mark changed every cell in win that is changed in any of its ancestors */ 126 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...) */ 127 { 128 if (win && win->_parent) { 129 WINDOW *pp = win->_parent; 130 int y; 131 132 /* This recursion guarantees, that the changes are propagated down- 133 wards from the root to our direct parent. */ 134 wsyncdown(pp); 135 136 /* and now we only have to propagate the changes from our direct 137 parent, if there are any. */ 138 assert((win->_pary <= pp->_maxy) && 139 ((win->_pary + win->_maxy) <= pp->_maxy)); 140 141 for (y = 0; y <= win->_maxy; y++) { 142 if (pp->_line[win->_pary + y].firstchar >= 0) { /* parent changed */ 143 struct ldat *line = &(win->_line[y]); 144 /* left and right character in child coordinates */ 145 int left = pp->_line[win->_pary + y].firstchar - win->_parx; 146 int right = pp->_line[win->_pary + y].lastchar - win->_parx; 147 /* The change maybe outside the childs range */ 148 if (left < 0) 149 left = 0; 150 if (right > win->_maxx) 151 right = win->_maxx; 152 CHANGED_RANGE(line, left, right); 153 } 154 } 155 } 156 } 157 158 NCURSES_EXPORT(void) 159 wcursyncup(WINDOW *win) 160 /* sync the cursor in all derived windows to its value in the base window */ 161 { 162 WINDOW *wp; 163 for (wp = win; wp && wp->_parent; wp = wp->_parent) { 164 wmove(wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx); 165 } 166 } 167 168 NCURSES_EXPORT(WINDOW *) 169 dupwin(WINDOW *win) 170 /* make an exact duplicate of the given window */ 171 { 172 WINDOW *nwin; 173 size_t linesize; 174 int i; 175 176 T((T_CALLED("dupwin(%p)"), win)); 177 178 if ((win == NULL) || 179 ((nwin = newwin(win->_maxy + 1, win->_maxx + 1, win->_begy, 180 win->_begx)) == NULL)) 181 returnWin(0); 182 183 nwin->_curx = win->_curx; 184 nwin->_cury = win->_cury; 185 nwin->_maxy = win->_maxy; 186 nwin->_maxx = win->_maxx; 187 nwin->_begy = win->_begy; 188 nwin->_begx = win->_begx; 189 nwin->_yoffset = win->_yoffset; 190 191 nwin->_flags = win->_flags & ~_SUBWIN; 192 /* Due to the use of newwin(), the clone is not a subwindow. 193 * The text is really copied into the clone. 194 */ 195 196 nwin->_attrs = win->_attrs; 197 nwin->_bkgd = win->_bkgd; 198 199 nwin->_clear = win->_clear; 200 nwin->_scroll = win->_scroll; 201 nwin->_leaveok = win->_leaveok; 202 nwin->_use_keypad = win->_use_keypad; 203 nwin->_delay = win->_delay; 204 nwin->_immed = win->_immed; 205 nwin->_sync = win->_sync; 206 207 nwin->_parx = 0; 208 nwin->_pary = 0; 209 nwin->_parent = (WINDOW *) 0; 210 /* See above: the clone isn't a subwindow! */ 211 212 nwin->_regtop = win->_regtop; 213 nwin->_regbottom = win->_regbottom; 214 215 linesize = (win->_maxx + 1) * sizeof(chtype); 216 for (i = 0; i <= nwin->_maxy; i++) { 217 memcpy(nwin->_line[i].text, win->_line[i].text, linesize); 218 nwin->_line[i].firstchar = win->_line[i].firstchar; 219 nwin->_line[i].lastchar = win->_line[i].lastchar; 220 } 221 222 returnWin(nwin); 223 } 224