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Diffstat (limited to 'Utilities/cmpdcurses/pdcurses/pad.c')
| -rw-r--r-- | Utilities/cmpdcurses/pdcurses/pad.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/Utilities/cmpdcurses/pdcurses/pad.c b/Utilities/cmpdcurses/pdcurses/pad.c new file mode 100644 index 0000000..da8e968 --- /dev/null +++ b/Utilities/cmpdcurses/pdcurses/pad.c @@ -0,0 +1,280 @@ +/* PDCurses */ + +#include <curspriv.h> + +/*man-start************************************************************** + +pad +--- + +### Synopsis + + WINDOW *newpad(int nlines, int ncols); + WINDOW *subpad(WINDOW *orig, int nlines, int ncols, + int begy, int begx); + int prefresh(WINDOW *win, int py, int px, int sy1, int sx1, + int sy2, int sx2); + int pnoutrefresh(WINDOW *w, int py, int px, int sy1, int sx1, + int sy2, int sx2); + int pechochar(WINDOW *pad, chtype ch); + int pecho_wchar(WINDOW *pad, const cchar_t *wch); + + bool is_pad(const WINDOW *pad); + +### Description + + A pad is a special kind of window, which is not restricted by the + screen size, and is not necessarily associated with a particular part + of the screen. You can use a pad when you need a large window, and + only a part of the window will be on the screen at one time. Pads are + not refreshed automatically (e.g., from scrolling or echoing of + input). You can't call wrefresh() with a pad as an argument; use + prefresh() or pnoutrefresh() instead. Note that these routines + require additional parameters to specify the part of the pad to be + displayed, and the location to use on the screen. + + newpad() creates a new pad data structure. + + subpad() creates a new sub-pad within a pad, at position (begy, + begx), with dimensions of nlines lines and ncols columns. This + position is relative to the pad, and not to the screen as with + subwin. Changes to either the parent pad or sub-pad will affect both. + When using sub-pads, you may need to call touchwin() before calling + prefresh(). + + pnoutrefresh() copies the specified pad to the virtual screen. + + prefresh() calls pnoutrefresh(), followed by doupdate(). + + These routines are analogous to wnoutrefresh() and wrefresh(). (py, + px) specifies the upper left corner of the part of the pad to be + displayed; (sy1, sx1) and (sy2, sx2) describe the screen rectangle + that will contain the selected part of the pad. + + pechochar() is functionally equivalent to addch() followed by a call + to prefresh(), with the last-used coordinates and dimensions. + pecho_wchar() is the wide-character version. + + is_pad() reports whether the specified window is a pad. + +### Return Value + + All functions except is_pad() return OK on success and ERR on error. + +### Portability + X/Open ncurses NetBSD + newpad Y Y Y + subpad Y Y Y + prefresh Y Y Y + pnoutrefresh Y Y Y + pechochar Y Y Y + pecho_wchar Y Y Y + is_pad - Y Y + +**man-end****************************************************************/ + +#include <string.h> + +/* save values for pechochar() */ + +static int save_pminrow, save_pmincol; +static int save_sminrow, save_smincol, save_smaxrow, save_smaxcol; + +WINDOW *newpad(int nlines, int ncols) +{ + WINDOW *win; + + PDC_LOG(("newpad() - called: lines=%d cols=%d\n", nlines, ncols)); + + win = PDC_makenew(nlines, ncols, 0, 0); + if (win) + win = PDC_makelines(win); + + if (!win) + return (WINDOW *)NULL; + + werase(win); + + win->_flags = _PAD; + + /* save default values in case pechochar() is the first call to + prefresh(). */ + + save_pminrow = 0; + save_pmincol = 0; + save_sminrow = 0; + save_smincol = 0; + save_smaxrow = min(LINES, nlines) - 1; + save_smaxcol = min(COLS, ncols) - 1; + + return win; +} + +WINDOW *subpad(WINDOW *orig, int nlines, int ncols, int begy, int begx) +{ + WINDOW *win; + int i; + + PDC_LOG(("subpad() - called: lines=%d cols=%d begy=%d begx=%d\n", + nlines, ncols, begy, begx)); + + if (!orig || !(orig->_flags & _PAD)) + return (WINDOW *)NULL; + + /* make sure window fits inside the original one */ + + if (begy < 0 || begx < 0 || + (begy + nlines) > orig->_maxy || + (begx + ncols) > orig->_maxx) + return (WINDOW *)NULL; + + if (!nlines) + nlines = orig->_maxy - begy; + + if (!ncols) + ncols = orig->_maxx - begx; + + win = PDC_makenew(nlines, ncols, begy, begx); + if (!win) + return (WINDOW *)NULL; + + /* initialize window variables */ + + win->_attrs = orig->_attrs; + win->_leaveit = orig->_leaveit; + win->_scroll = orig->_scroll; + win->_nodelay = orig->_nodelay; + win->_use_keypad = orig->_use_keypad; + win->_parent = orig; + + for (i = 0; i < nlines; i++) + win->_y[i] = orig->_y[begy + i] + begx; + + win->_flags = _SUBPAD; + + /* save default values in case pechochar() is the first call + to prefresh(). */ + + save_pminrow = 0; + save_pmincol = 0; + save_sminrow = 0; + save_smincol = 0; + save_smaxrow = min(LINES, nlines) - 1; + save_smaxcol = min(COLS, ncols) - 1; + + return win; +} + +int prefresh(WINDOW *win, int py, int px, int sy1, int sx1, int sy2, int sx2) +{ + PDC_LOG(("prefresh() - called\n")); + + if (pnoutrefresh(win, py, px, sy1, sx1, sy2, sx2) == ERR) + return ERR; + + doupdate(); + return OK; +} + +int pnoutrefresh(WINDOW *w, int py, int px, int sy1, int sx1, int sy2, int sx2) +{ + int num_cols; + int sline; + int pline; + + PDC_LOG(("pnoutrefresh() - called\n")); + + if (py < 0) + py = 0; + if (px < 0) + px = 0; + if (sy1 < 0) + sy1 = 0; + if (sx1 < 0) + sx1 = 0; + + if ((!w || !(w->_flags & (_PAD|_SUBPAD)) || + (sy2 >= LINES) || (sx2 >= COLS)) || + (sy2 < sy1) || (sx2 < sx1)) + return ERR; + + sline = sy1; + pline = py; + + num_cols = min((sx2 - sx1 + 1), (w->_maxx - px)); + + while (sline <= sy2) + { + if (pline < w->_maxy) + { + memcpy(curscr->_y[sline] + sx1, w->_y[pline] + px, + num_cols * sizeof(chtype)); + + if ((curscr->_firstch[sline] == _NO_CHANGE) + || (curscr->_firstch[sline] > sx1)) + curscr->_firstch[sline] = sx1; + + if (sx2 > curscr->_lastch[sline]) + curscr->_lastch[sline] = sx2; + + w->_firstch[pline] = _NO_CHANGE; /* updated now */ + w->_lastch[pline] = _NO_CHANGE; /* updated now */ + } + + sline++; + pline++; + } + + if (w->_clear) + { + w->_clear = FALSE; + curscr->_clear = TRUE; + } + + /* position the cursor to the pad's current position if possible -- + is the pad current position going to end up displayed? if not, + then don't move the cursor; if so, move it to the correct place */ + + if (!w->_leaveit && w->_cury >= py && w->_curx >= px && + w->_cury <= py + (sy2 - sy1) && w->_curx <= px + (sx2 - sx1)) + { + curscr->_cury = (w->_cury - py) + sy1; + curscr->_curx = (w->_curx - px) + sx1; + } + + return OK; +} + +int pechochar(WINDOW *pad, chtype ch) +{ + PDC_LOG(("pechochar() - called\n")); + + if (waddch(pad, ch) == ERR) + return ERR; + + return prefresh(pad, save_pminrow, save_pmincol, save_sminrow, + save_smincol, save_smaxrow, save_smaxcol); +} + +#ifdef PDC_WIDE +int pecho_wchar(WINDOW *pad, const cchar_t *wch) +{ + PDC_LOG(("pecho_wchar() - called\n")); + + if (!wch || (waddch(pad, *wch) == ERR)) + return ERR; + + return prefresh(pad, save_pminrow, save_pmincol, save_sminrow, + save_smincol, save_smaxrow, save_smaxcol); +} +#endif + +bool is_pad(const WINDOW *pad) +{ + PDC_LOG(("is_pad() - called\n")); + + if (!pad) + return FALSE; + + return (pad->_flags & _PAD) ? TRUE : FALSE; +} |