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Annotation of researchv10no/ncurses/screen/_dellines.c, revision 1.1

1.1     ! root        1: /*     @(#) _dellines.c: 1.1 10/15/83  (1.21   2/11/83)        */
        !             2: 
        !             3: #include "curses.ext"
        !             4: 
        !             5: char *tparm();
        !             6: 
        !             7: extern int     _outch();
        !             8: 
        !             9: _dellines (n)
        !            10: {
        !            11:        register int i;
        !            12: 
        !            13: #ifdef DEBUG
        !            14:        if(outf) fprintf(outf, "_dellines(%d).\n", n);
        !            15: #endif
        !            16:        if (lines - SP->phys_y <= n && (clr_eol && n == 1 || clr_eos)) {
        !            17:                tputs(clr_eos, n, _outch);
        !            18:        } else
        !            19:        if (scroll_forward && SP->phys_y == SP->des_top_mgn /* &&costSF<costDL */) {
        !            20:                /*
        !            21:                 * Use forward scroll mode of the terminal, at
        !            22:                 * the bottom of the window.  Linefeed works
        !            23:                 * too, since we only use it from the bottom line.
        !            24:                 */
        !            25:                _setwind();
        !            26:                for (i = n; i > 0; i--) {
        !            27:                        _pos(SP->des_bot_mgn, 0);
        !            28:                        tputs(scroll_forward, 1, _outch);
        !            29:                        SP->ml_above++;
        !            30:                }
        !            31:                if (SP->ml_above + lines > lines_of_memory)
        !            32:                        SP->ml_above = lines_of_memory - lines;
        !            33:        } else if (parm_delete_line && (n>1 || *delete_line==0)) {
        !            34:                tputs(tparm(parm_delete_line, n, SP->phys_y), lines-SP->phys_y, _outch);
        !            35:        }
        !            36:        else if (change_scroll_region && *delete_line==0) {
        !            37:                /* vt100: fake delete_line by changing scrolling region */
        !            38:                /* Save since change_scroll_region homes cursor */
        !            39:                tputs(save_cursor, 1, _outch);
        !            40:                tputs(tparm(change_scroll_region,
        !            41:                        SP->phys_y, SP->des_bot_mgn), 1, _outch);
        !            42:                /* go to bottom left corner.. */
        !            43:                tputs(tparm(cursor_address, SP->des_bot_mgn, 0), 1, _outch);
        !            44:                for (i=0; i<n; i++)     /* .. and scroll n times */
        !            45:                        tputs(scroll_forward, 1, _outch);
        !            46:                /* restore scrolling region */
        !            47:                tputs(tparm(change_scroll_region,
        !            48:                        SP->des_top_mgn, SP->des_bot_mgn), 1, _outch);
        !            49:                tputs(restore_cursor, 1, _outch);       /* put SP->curptr back */
        !            50:                SP->phys_top_mgn = SP->des_top_mgn;
        !            51:                SP->phys_bot_mgn = SP->des_bot_mgn;
        !            52:        }
        !            53:        else {
        !            54:                for (i = 0; i < n; i++)
        !            55:                        tputs(delete_line, lines-SP->phys_y, _outch);
        !            56:        }
        !            57: }

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