1 #include <curses.h> 2 #include <stddef.h> 3 #include <stdlib.h> 4 #include "mucurses.h" 5 6 /** @file 7 * 8 * MuCurses windows instance functions 9 * 10 */ 11 12 /** 13 * Delete a window 14 * 15 * @v *win pointer to window being deleted 16 * @ret rc return status code 17 */ 18 int delwin ( WINDOW *win ) { 19 if ( win == NULL ) 20 return ERR; 21 22 /* I think we should blank the region covered by the window - 23 ncurses doesn't do this, but they have a buffer, so they 24 may just be deleting from an offscreen context whereas we 25 are guaranteed to be deleting something onscreen */ 26 wmove( win, 0, 0 ); 27 chtype killch = (chtype)' '; 28 do { 29 _wputch( win, killch, WRAP ); 30 } while ( win->curs_x + win->curs_y ); 31 32 free( win ); 33 34 wmove ( stdscr, 0, 0 ); 35 36 return OK; 37 } 38 39 /** 40 * Create a new derived window 41 * 42 * @v parent parent window 43 * @v nlines window height 44 * @v ncols window width 45 * @v begin_y window y origin (relative to parent) 46 * @v begin_x window x origin (relative to parent) 47 * @ret ptr return pointer to child window 48 */ 49 WINDOW *derwin ( WINDOW *parent, int nlines, int ncols, 50 int begin_y, int begin_x ) { 51 WINDOW *child; 52 if ( parent == NULL ) 53 return NULL; 54 if ( ( child = malloc( sizeof( WINDOW ) ) ) == NULL ) 55 return NULL; 56 if ( ( (unsigned)ncols > parent->width ) || 57 ( (unsigned)nlines > parent->height ) ) 58 return NULL; 59 child->ori_y = parent->ori_y + begin_y; 60 child->ori_x = parent->ori_x + begin_x; 61 child->height = nlines; 62 child->width = ncols; 63 child->parent = parent; 64 child->scr = parent->scr; 65 return child; 66 } 67 68 /** 69 * Create a duplicate of the specified window 70 * 71 * @v orig original window 72 * @ret ptr pointer to duplicate window 73 */ 74 WINDOW *dupwin ( WINDOW *orig ) { 75 WINDOW *copy; 76 if ( orig == NULL ) 77 return NULL; 78 if ( ( copy = malloc( sizeof( WINDOW ) ) ) == NULL ) 79 return NULL; 80 copy->scr = orig->scr; 81 copy->attrs = orig->attrs; 82 copy->ori_y = orig->ori_y; 83 copy->ori_x = orig->ori_x; 84 copy->curs_y = orig->curs_y; 85 copy->curs_x = orig->curs_x; 86 copy->height = orig->height; 87 copy->width = orig->width; 88 return copy; 89 } 90 91 /** 92 * Move window origin to specified coordinates 93 * 94 * @v *win window to move 95 * @v y Y position 96 * @v x X position 97 * @ret rc return status code 98 */ 99 int mvwin ( WINDOW *win, int y, int x ) { 100 if ( win == NULL ) 101 return ERR; 102 if ( ( ( (unsigned)y + win->height ) > LINES ) || 103 ( ( (unsigned)x + win->width ) > COLS ) ) 104 return ERR; 105 106 win->ori_y = y; 107 win->ori_x = x; 108 109 return OK; 110 } 111 112 /** 113 * Create new WINDOW 114 * 115 * @v nlines number of lines 116 * @v ncols number of columns 117 * @v begin_y column origin 118 * @v begin_x line origin 119 * @ret *win return pointer to new window 120 */ 121 WINDOW *newwin ( int nlines, int ncols, int begin_y, int begin_x ) { 122 WINDOW *win; 123 if ( ( win = malloc( sizeof(WINDOW) ) ) == NULL ) 124 return NULL; 125 if ( ( (unsigned)( begin_y + nlines ) > stdscr->height ) && 126 ( (unsigned)( begin_x + ncols ) > stdscr->width ) ) 127 return NULL; 128 win->ori_y = begin_y; 129 win->ori_x = begin_x; 130 win->height = nlines; 131 win->width = ncols; 132 win->scr = stdscr->scr; 133 win->parent = stdscr; 134 return win; 135 } 136 137 /** 138 * Create a new sub-window 139 * 140 * @v orig parent window 141 * @v nlines window height 142 * @v ncols window width 143 * @v begin_y window y origin (absolute) 144 * @v begin_x window x origin (absolute) 145 * @ret ptr return pointer to child window 146 */ 147 WINDOW *subwin ( WINDOW *parent, int nlines, int ncols, 148 int begin_y, int begin_x ) { 149 WINDOW *child; 150 if ( parent == NULL ) 151 return NULL; 152 if ( ( child = malloc( sizeof( WINDOW ) ) ) == NULL ) 153 return NULL; 154 child = newwin( nlines, ncols, begin_y, begin_x ); 155 child->parent = parent; 156 child->scr = parent->scr; 157 return child; 158 } 159
