1 /**************************************************************************** 2 * Copyright (c) 1998,1999,2000 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: Thomas E. Dickey <dickey@clark.net> 1996,1997 * 31 ****************************************************************************/ 32 33 #include <curses.priv.h> 34 35 MODULE_ID("$Id: wresize.c,v 1.16 2000/03/05 00:14:35 tom Exp $") 36 37 /* 38 * Reallocate a curses WINDOW struct to either shrink or grow to the specified 39 * new lines/columns. If it grows, the new character cells are filled with 40 * blanks. The application is responsible for repainting the blank area. 41 */ 42 43 #define DOALLOC(p,t,n) typeRealloc(t, n, p) 44 #define ld_ALLOC(p,n) DOALLOC(p,struct ldat,n) 45 #define c_ALLOC(p,n) DOALLOC(p,chtype,n) 46 47 int 48 wresize(WINDOW *win, int ToLines, int ToCols) 49 { 50 register int row; 51 int size_x, size_y; 52 struct ldat *pline; 53 chtype blank; 54 55 #ifdef TRACE 56 T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols)); 57 if (win) { 58 TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)", 59 win->_begy, win->_begx, 60 win->_maxy, win->_maxx, 61 win->_regtop, win->_regbottom)); 62 if (_nc_tracing & TRACE_UPDATE) 63 _tracedump("...before", win); 64 } 65 #endif 66 67 if (!win || --ToLines < 0 || --ToCols < 0) 68 returnCode(ERR); 69 70 size_x = win->_maxx; 71 size_y = win->_maxy; 72 73 if (ToLines == size_y 74 && ToCols == size_x) 75 returnCode(OK); 76 77 if ((win->_flags & _SUBWIN)) { 78 /* 79 * Check if the new limits will fit into the parent window's size. If 80 * not, do not resize. We could adjust the location of the subwindow, 81 * but the application may not like that. 82 */ 83 if (win->_pary + ToLines > win->_parent->_maxy 84 || win->_parx + ToCols > win->_parent->_maxx) { 85 returnCode(ERR); 86 } 87 pline = win->_parent->_line; 88 } else { 89 pline = 0; 90 } 91 92 /* 93 * If the number of lines has changed, adjust the size of the overall 94 * vector: 95 */ 96 if (ToLines != size_y) { 97 if (!(win->_flags & _SUBWIN)) { 98 for (row = ToLines + 1; row <= size_y; row++) 99 free((char *) (win->_line[row].text)); 100 } 101 102 win->_line = ld_ALLOC(win->_line, ToLines + 1); 103 if (win->_line == 0) 104 returnCode(ERR); 105 106 for (row = size_y + 1; row <= ToLines; row++) { 107 win->_line[row].text = 0; 108 win->_line[row].firstchar = 0; 109 win->_line[row].lastchar = ToCols; 110 if ((win->_flags & _SUBWIN)) { 111 win->_line[row].text = 112 &pline[win->_pary + row].text[win->_parx]; 113 } 114 } 115 } 116 117 /* 118 * Adjust the width of the columns: 119 */ 120 blank = _nc_background(win); 121 for (row = 0; row <= ToLines; row++) { 122 chtype *s = win->_line[row].text; 123 int begin = (s == 0) ? 0 : size_x + 1; 124 int end = ToCols; 125 126 if_USE_SCROLL_HINTS(win->_line[row].oldindex = row); 127 128 if (ToCols != size_x || s == 0) { 129 if (!(win->_flags & _SUBWIN)) { 130 win->_line[row].text = s = c_ALLOC(s, ToCols + 1); 131 if (win->_line[row].text == 0) 132 returnCode(ERR); 133 } else if (s == 0) { 134 win->_line[row].text = s = 135 &pline[win->_pary + row].text[win->_parx]; 136 } 137 138 if (end >= begin) { /* growing */ 139 if (win->_line[row].firstchar < begin) 140 win->_line[row].firstchar = begin; 141 win->_line[row].lastchar = ToCols; 142 do { 143 s[end] = blank; 144 } while (--end >= begin); 145 } else { /* shrinking */ 146 win->_line[row].firstchar = 0; 147 win->_line[row].lastchar = ToCols; 148 } 149 } 150 } 151 152 /* 153 * Finally, adjust the parameters showing screen size and cursor 154 * position: 155 */ 156 win->_maxx = ToCols; 157 win->_maxy = ToLines; 158 159 if (win->_regtop > win->_maxy) 160 win->_regtop = win->_maxy; 161 if (win->_regbottom > win->_maxy 162 || win->_regbottom == size_y) 163 win->_regbottom = win->_maxy; 164 165 if (win->_curx > win->_maxx) 166 win->_curx = win->_maxx; 167 if (win->_cury > win->_maxy) 168 win->_cury = win->_maxy; 169 170 #ifdef TRACE 171 TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)", 172 win->_begy, win->_begx, 173 win->_maxy, win->_maxx, 174 win->_regtop, win->_regbottom)); 175 if (_nc_tracing & TRACE_UPDATE) 176 _tracedump("...after:", win); 177 #endif 178 returnCode(OK); 179 } 180