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121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
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/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
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* details. If they are missing then this copy is in violation of *
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* the copyright conditions. */
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/*
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** lib_insdel.c
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**
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** The routine winsdel(win, n).
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** positive n insert n lines above current line
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** negative n delete n lines starting from current line
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**
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*/
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#include <stdlib.h>
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#include "curses.priv.h"
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#include <nterm.h>
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int
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winsdel(WINDOW *win, int n)
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{
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int line, i;
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int touched = 0;
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chtype *ptr, *temp;
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chtype **saved;
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chtype blank = ' ';
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T(("winsdel(%x,%d) called", win, n));
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if (n == 0)
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return OK;
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if (n < 0 && win->_cury - n >= win->_maxy)
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/* request to delete too many lines */
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/* should we truncate to an appropriate number? */
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return ERR;
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saved = (chtype **)malloc(sizeof(chtype *) * abs(n));
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if (n < 0) {
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/* save overwritten lines */
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for (i = 0; i < -n; i++)
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saved[i] = win->_line[win->_regbottom-i];
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/* delete n lines */
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for (line = win->_regbottom; line >= win->_cury; line--)
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win->_line[line] = win->_line[line+n];
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/* restore saved lines and blank them */
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for (i = 0, line = win->_regtop; line < win->_regtop-n; line++, i++) {
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win->_line[line] = saved[i];
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temp = win->_line[line];
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for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
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*ptr = blank;
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}
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}
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if (n > 0) {
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/* save overwritten lines */
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for (i = 0; i < n; i++)
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saved[i] = win->_line[win->_regtop+i];
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/* insert n lines */
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for (line = win->_regtop; line < win->_regtop + n; line++)
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win->_line[line] = win->_line[line+n];
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/* restore saved lines and blank them */
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for (i = 0, line = win->_regtop + n; i < n; line--, i++) {
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temp = win->_line[line] = saved[i];
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for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
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*ptr = blank;
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}
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}
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free(saved);
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/* as an optimization, if the window is COLS wide we can try
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using idl assuming _idlok is true */
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if (win->_maxx == columns && win->_idlok == TRUE) {
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if (n > 0) {
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mvcur(-1, -1, win->_cury, 0);
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if (parm_insert_line) {
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putp(tparm(parm_insert_line, n));
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touched = 1;
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} else if (insert_line) {
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while (n--)
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putp(insert_line);
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touched = 1;
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}
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}
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if (n < 0) {
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mvcur(-1, -1, win->_cury, 0);
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n = abs(n);
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if (parm_delete_line) {
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putp(tparm(parm_delete_line, n));
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touched = 1;
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} else if (delete_line) {
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while (n--)
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putp(delete_line);
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touched = 1;
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}
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}
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mvcur(-1, -1, win->_cury, win->_curx);
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}
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if (touched == 0)
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touchline(win, win->_regtop, win->_regbottom - win->_regtop + 1);
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touched = 0;
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return OK;
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}
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