e11835e299
Change-Id: Iffed3602456f5306711c65f06c873c58d4086e11 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/363 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
257 lines
7.3 KiB
C
257 lines
7.3 KiB
C
/* Public Domain Curses */
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#include <curspriv.h>
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RCSID("$Id: overlay.c,v 1.36 2008/07/14 12:35:23 wmcbrine Exp $")
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/*man-start**************************************************************
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Name: overlay
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Synopsis:
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int overlay(const WINDOW *src_w, WINDOW *dst_w)
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int overwrite(const WINDOW *src_w, WINDOW *dst_w)
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int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
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int src_tc, int dst_tr, int dst_tc, int dst_br,
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int dst_bc, bool overlay)
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Description:
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overlay() and overwrite() copy all the text from src_w into
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dst_w. The windows need not be the same size. Those characters
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in the source window that intersect with the destination window
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are copied, so that the characters appear in the same physical
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position on the screen. The difference between the two functions
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is that overlay() is non-destructive (blanks are not copied)
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while overwrite() is destructive (blanks are copied).
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copywin() is similar, but doesn't require that the two windows
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overlap. The arguments src_tc and src_tr specify the top left
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corner of the region to be copied. dst_tc, dst_tr, dst_br, and
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dst_bc specify the region within the destination window to copy
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to. The argument "overlay", if TRUE, indicates that the copy is
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done non-destructively (as in overlay()); blanks in the source
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window are not copied to the destination window. When overlay is
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FALSE, blanks are copied.
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Return Value:
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All functions return OK on success and ERR on error.
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Portability X/Open BSD SYS V
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overlay Y Y Y
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overwrite Y Y Y
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copywin Y - 3.0
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**man-end****************************************************************/
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/* Thanks to Andreas Otte <venn@@uni-paderborn.de> for the
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corrected overlay()/overwrite() behavior. */
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static int _copy_win(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
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int src_tc, int src_br, int src_bc, int dst_tr,
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int dst_tc, bool overlay)
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{
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int col, line, y1, fc, *minchng, *maxchng;
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chtype *w1ptr, *w2ptr;
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int lc = 0;
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int xdiff = src_bc - src_tc;
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int ydiff = src_br - src_tr;
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if (!src_w || !dst_w)
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return ERR;
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minchng = dst_w->_firstch;
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maxchng = dst_w->_lastch;
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for (y1 = 0; y1 < dst_tr; y1++)
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{
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minchng++;
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maxchng++;
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}
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for (line = 0; line < ydiff; line++)
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{
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w1ptr = src_w->_y[line + src_tr] + src_tc;
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w2ptr = dst_w->_y[line + dst_tr] + dst_tc;
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fc = _NO_CHANGE;
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for (col = 0; col < xdiff; col++)
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{
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if ((*w1ptr) != (*w2ptr) &&
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!((*w1ptr & A_CHARTEXT) == ' ' && overlay))
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{
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*w2ptr = *w1ptr;
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if (fc == _NO_CHANGE)
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fc = col + dst_tc;
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lc = col + dst_tc;
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}
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w1ptr++;
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w2ptr++;
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}
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if (*minchng == _NO_CHANGE)
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{
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*minchng = fc;
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*maxchng = lc;
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}
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else if (fc != _NO_CHANGE)
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{
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if (fc < *minchng)
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*minchng = fc;
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if (lc > *maxchng)
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*maxchng = lc;
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}
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minchng++;
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maxchng++;
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}
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return OK;
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}
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int overlay(const WINDOW *src_w, WINDOW *dst_w)
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{
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int first_line, first_col, last_line, last_col;
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int src_start_x, src_start_y, dst_start_x, dst_start_y;
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int xdiff, ydiff;
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PDC_LOG(("overlay() - called\n"));
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if (!src_w || !dst_w)
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return ERR;
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first_col = max(dst_w->_begx, src_w->_begx);
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first_line = max(dst_w->_begy, src_w->_begy);
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last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
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last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
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/* determine the overlapping region of the two windows in real
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coordinates */
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/* if no overlapping region, do nothing */
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if ((last_col < first_col) || (last_line < first_line))
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return OK;
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/* size of overlapping region */
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xdiff = last_col - first_col;
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ydiff = last_line - first_line;
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if (src_w->_begx <= dst_w->_begx)
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{
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src_start_x = dst_w->_begx - src_w->_begx;
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dst_start_x = 0;
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}
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else
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{
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dst_start_x = src_w->_begx - dst_w->_begx;
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src_start_x = 0;
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}
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if (src_w->_begy <= dst_w->_begy)
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{
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src_start_y = dst_w->_begy - src_w->_begy;
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dst_start_y = 0;
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}
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else
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{
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dst_start_y = src_w->_begy - dst_w->_begy;
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src_start_y = 0;
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}
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return _copy_win(src_w, dst_w, src_start_y, src_start_x,
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src_start_y + ydiff, src_start_x + xdiff,
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dst_start_y, dst_start_x, TRUE);
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}
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int overwrite(const WINDOW *src_w, WINDOW *dst_w)
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{
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int first_line, first_col, last_line, last_col;
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int src_start_x, src_start_y, dst_start_x, dst_start_y;
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int xdiff, ydiff;
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PDC_LOG(("overwrite() - called\n"));
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if (!src_w || !dst_w)
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return ERR;
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first_col = max(dst_w->_begx, src_w->_begx);
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first_line = max(dst_w->_begy, src_w->_begy);
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last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
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last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
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/* determine the overlapping region of the two windows in real
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coordinates */
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/* if no overlapping region, do nothing */
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if ((last_col < first_col) || (last_line < first_line))
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return OK;
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/* size of overlapping region */
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xdiff = last_col - first_col;
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ydiff = last_line - first_line;
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if (src_w->_begx <= dst_w->_begx)
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{
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src_start_x = dst_w->_begx - src_w->_begx;
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dst_start_x = 0;
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}
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else
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{
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dst_start_x = src_w->_begx - dst_w->_begx;
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src_start_x = 0;
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}
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if (src_w->_begy <= dst_w->_begy)
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{
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src_start_y = dst_w->_begy - src_w->_begy;
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dst_start_y = 0;
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}
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else
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{
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dst_start_y = src_w->_begy - dst_w->_begy;
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src_start_y = 0;
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}
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return _copy_win(src_w, dst_w, src_start_y, src_start_x,
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src_start_y + ydiff, src_start_x + xdiff,
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dst_start_y, dst_start_x, FALSE);
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}
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int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr, int src_tc,
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int dst_tr, int dst_tc, int dst_br, int dst_bc, int overlay)
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{
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int src_end_x, src_end_y;
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int src_rows, src_cols, dst_rows, dst_cols;
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int min_rows, min_cols;
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PDC_LOG(("copywin() - called\n"));
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if (!src_w || !dst_w || dst_w == curscr || dst_br > dst_w->_maxy
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|| dst_bc > dst_w->_maxx || dst_tr < 0 || dst_tc < 0)
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return ERR;
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src_rows = src_w->_maxy - src_tr;
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src_cols = src_w->_maxx - src_tc;
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dst_rows = dst_br - dst_tr + 1;
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dst_cols = dst_bc - dst_tc + 1;
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min_rows = min(src_rows, dst_rows);
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min_cols = min(src_cols, dst_cols);
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src_end_y = src_tr + min_rows;
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src_end_x = src_tc + min_cols;
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return _copy_win(src_w, dst_w, src_tr, src_tc, src_end_y, src_end_x,
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dst_tr, dst_tc, overlay);
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}
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