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Diffstat (limited to 'Utilities/cmpdcurses/pdcurses/touch.c')
| -rw-r--r-- | Utilities/cmpdcurses/pdcurses/touch.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/Utilities/cmpdcurses/pdcurses/touch.c b/Utilities/cmpdcurses/pdcurses/touch.c new file mode 100644 index 0000000..e1b7c60 --- /dev/null +++ b/Utilities/cmpdcurses/pdcurses/touch.c @@ -0,0 +1,199 @@ +/* PDCurses */ + +#include <curspriv.h> + +/*man-start************************************************************** + +touch +----- + +### Synopsis + + int touchwin(WINDOW *win); + int touchline(WINDOW *win, int start, int count); + int untouchwin(WINDOW *win); + int wtouchln(WINDOW *win, int y, int n, int changed); + bool is_linetouched(WINDOW *win, int line); + bool is_wintouched(WINDOW *win); + + int touchoverlap(const WINDOW *win1, WINDOW *win2); + +### Description + + touchwin() and touchline() throw away all information about which + parts of the window have been touched, pretending that the entire + window has been drawn on. This is sometimes necessary when using + overlapping windows, since a change to one window will affect the + other window, but the records of which lines have been changed in the + other window will not reflect the change. + + untouchwin() marks all lines in the window as unchanged since the + last call to wrefresh(). + + wtouchln() makes n lines in the window, starting at line y, look as + if they have (changed == 1) or have not (changed == 0) been changed + since the last call to wrefresh(). + + is_linetouched() returns TRUE if the specified line in the specified + window has been changed since the last call to wrefresh(). + + is_wintouched() returns TRUE if the specified window has been changed + since the last call to wrefresh(). + + touchoverlap(win1, win2) marks the portion of win2 which overlaps + with win1 as modified. + +### Return Value + + All functions return OK on success and ERR on error except + is_wintouched() and is_linetouched(). + +### Portability + X/Open ncurses NetBSD + touchwin Y Y Y + touchline Y Y Y + untouchwin Y Y Y + wtouchln Y Y Y + is_linetouched Y Y Y + is_wintouched Y Y Y + touchoverlap - - Y + +**man-end****************************************************************/ + +int touchwin(WINDOW *win) +{ + int i; + + PDC_LOG(("touchwin() - called: Win=%x\n", win)); + + if (!win) + return ERR; + + for (i = 0; i < win->_maxy; i++) + { + win->_firstch[i] = 0; + win->_lastch[i] = win->_maxx - 1; + } + + return OK; +} + +int touchline(WINDOW *win, int start, int count) +{ + int i; + + PDC_LOG(("touchline() - called: win=%p start %d count %d\n", + win, start, count)); + + if (!win || start > win->_maxy || start + count > win->_maxy) + return ERR; + + for (i = start; i < start + count; i++) + { + win->_firstch[i] = 0; + win->_lastch[i] = win->_maxx - 1; + } + + return OK; +} + +int untouchwin(WINDOW *win) +{ + int i; + + PDC_LOG(("untouchwin() - called: win=%p", win)); + + if (!win) + return ERR; + + for (i = 0; i < win->_maxy; i++) + { + win->_firstch[i] = _NO_CHANGE; + win->_lastch[i] = _NO_CHANGE; + } + + return OK; +} + +int wtouchln(WINDOW *win, int y, int n, int changed) +{ + int i; + + PDC_LOG(("wtouchln() - called: win=%p y=%d n=%d changed=%d\n", + win, y, n, changed)); + + if (!win || y > win->_maxy || y + n > win->_maxy) + return ERR; + + for (i = y; i < y + n; i++) + { + if (changed) + { + win->_firstch[i] = 0; + win->_lastch[i] = win->_maxx - 1; + } + else + { + win->_firstch[i] = _NO_CHANGE; + win->_lastch[i] = _NO_CHANGE; + } + } + + return OK; +} + +bool is_linetouched(WINDOW *win, int line) +{ + PDC_LOG(("is_linetouched() - called: win=%p line=%d\n", win, line)); + + if (!win || line > win->_maxy || line < 0) + return FALSE; + + return (win->_firstch[line] != _NO_CHANGE) ? TRUE : FALSE; +} + +bool is_wintouched(WINDOW *win) +{ + int i; + + PDC_LOG(("is_wintouched() - called: win=%p\n", win)); + + if (win) + for (i = 0; i < win->_maxy; i++) + if (win->_firstch[i] != _NO_CHANGE) + return TRUE; + + return FALSE; +} + +int touchoverlap(const WINDOW *win1, WINDOW *win2) +{ + int y, endy, endx, starty, startx; + + PDC_LOG(("touchoverlap() - called: win1=%p win2=%p\n", win1, win2)); + + if (!win1 || !win2) + return ERR; + + starty = max(win1->_begy, win2->_begy); + startx = max(win1->_begx, win2->_begx); + endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy); + endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); + + if (starty >= endy || startx >= endx) + return OK; + + starty -= win2->_begy; + startx -= win2->_begx; + endy -= win2->_begy; + endx -= win2->_begx; + endx -= 1; + + for (y = starty; y < endy; y++) + { + win2->_firstch[y] = startx; + win2->_lastch[y] = endx; + } + + return OK; +} |