comparison: pdcurses/clear.c
pdcurses/clear.c
- changeset 97
- 2d43f05b284c
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| 96:5314ebdcb38d | 97:2d43f05b284c |
|---|---|
| 1 /* Public Domain Curses */ | |
| 2 | |
| 3 #include <curspriv.h> | |
| 4 | |
| 5 RCSID("$Id: clear.c,v 1.35 2008/07/13 16:08:18 wmcbrine Exp $") | |
| 6 | |
| 7 /*man-start************************************************************** | |
| 8 | |
| 9 Name: clear | |
| 10 | |
| 11 Synopsis: | |
| 12 int clear(void); | |
| 13 int wclear(WINDOW *win); | |
| 14 int erase(void); | |
| 15 int werase(WINDOW *win); | |
| 16 int clrtobot(void); | |
| 17 int wclrtobot(WINDOW *win); | |
| 18 int clrtoeol(void); | |
| 19 int wclrtoeol(WINDOW *win); | |
| 20 | |
| 21 Description: | |
| 22 erase() and werase() copy blanks (i.e. the background chtype) to | |
| 23 every cell of the window. | |
| 24 | |
| 25 clear() and wclear() are similar to erase() and werase(), but | |
| 26 they also call clearok() to ensure that the the window is | |
| 27 cleared on the next wrefresh(). | |
| 28 | |
| 29 clrtobot() and wclrtobot() clear the window from the current | |
| 30 cursor position to the end of the window. | |
| 31 | |
| 32 clrtoeol() and wclrtoeol() clear the window from the current | |
| 33 cursor position to the end of the current line. | |
| 34 | |
| 35 Return Value: | |
| 36 All functions return OK on success and ERR on error. | |
| 37 | |
| 38 Portability X/Open BSD SYS V | |
| 39 clear Y Y Y | |
| 40 wclear Y Y Y | |
| 41 erase Y Y Y | |
| 42 werase Y Y Y | |
| 43 clrtobot Y Y Y | |
| 44 wclrtobot Y Y Y | |
| 45 clrtoeol Y Y Y | |
| 46 wclrtoeol Y Y Y | |
| 47 | |
| 48 **man-end****************************************************************/ | |
| 49 | |
| 50 int wclrtoeol(WINDOW *win) | |
| 51 { | |
| 52 int x, y, minx; | |
| 53 chtype blank, *ptr; | |
| 54 | |
| 55 PDC_LOG(("wclrtoeol() - called: Row: %d Col: %d\n", | |
| 56 win->_cury, win->_curx)); | |
| 57 | |
| 58 if (!win) | |
| 59 return ERR; | |
| 60 | |
| 61 y = win->_cury; | |
| 62 x = win->_curx; | |
| 63 | |
| 64 /* wrs (4/10/93) account for window background */ | |
| 65 | |
| 66 blank = win->_bkgd; | |
| 67 | |
| 68 for (minx = x, ptr = &win->_y[y][x]; minx < win->_maxx; minx++, ptr++) | |
| 69 *ptr = blank; | |
| 70 | |
| 71 if (x < win->_firstch[y] || win->_firstch[y] == _NO_CHANGE) | |
| 72 win->_firstch[y] = x; | |
| 73 | |
| 74 win->_lastch[y] = win->_maxx - 1; | |
| 75 | |
| 76 PDC_sync(win); | |
| 77 return OK; | |
| 78 } | |
| 79 | |
| 80 int clrtoeol(void) | |
| 81 { | |
| 82 PDC_LOG(("clrtoeol() - called\n")); | |
| 83 | |
| 84 return wclrtoeol(stdscr); | |
| 85 } | |
| 86 | |
| 87 int wclrtobot(WINDOW *win) | |
| 88 { | |
| 89 int savey = win->_cury; | |
| 90 int savex = win->_curx; | |
| 91 | |
| 92 PDC_LOG(("wclrtobot() - called\n")); | |
| 93 | |
| 94 if (!win) | |
| 95 return ERR; | |
| 96 | |
| 97 /* should this involve scrolling region somehow ? */ | |
| 98 | |
| 99 if (win->_cury + 1 < win->_maxy) | |
| 100 { | |
| 101 win->_curx = 0; | |
| 102 win->_cury++; | |
| 103 for (; win->_maxy > win->_cury; win->_cury++) | |
| 104 wclrtoeol(win); | |
| 105 win->_cury = savey; | |
| 106 win->_curx = savex; | |
| 107 } | |
| 108 wclrtoeol(win); | |
| 109 | |
| 110 PDC_sync(win); | |
| 111 return OK; | |
| 112 } | |
| 113 | |
| 114 int clrtobot(void) | |
| 115 { | |
| 116 PDC_LOG(("clrtobot() - called\n")); | |
| 117 | |
| 118 return wclrtobot(stdscr); | |
| 119 } | |
| 120 | |
| 121 int werase(WINDOW *win) | |
| 122 { | |
| 123 PDC_LOG(("werase() - called\n")); | |
| 124 | |
| 125 if (wmove(win, 0, 0) == ERR) | |
| 126 return ERR; | |
| 127 | |
| 128 return wclrtobot(win); | |
| 129 } | |
| 130 | |
| 131 int erase(void) | |
| 132 { | |
| 133 PDC_LOG(("erase() - called\n")); | |
| 134 | |
| 135 return werase(stdscr); | |
| 136 } | |
| 137 | |
| 138 int wclear(WINDOW *win) | |
| 139 { | |
| 140 PDC_LOG(("wclear() - called\n")); | |
| 141 | |
| 142 if (!win) | |
| 143 return ERR; | |
| 144 | |
| 145 win->_clear = TRUE; | |
| 146 return werase(win); | |
| 147 } | |
| 148 | |
| 149 int clear(void) | |
| 150 { | |
| 151 PDC_LOG(("clear() - called\n")); | |
| 152 | |
| 153 return wclear(stdscr); | |
| 154 } |
