33254aaaad
Gregory Nutt is the copyright holder for those files and he has submitted the SGA as a result we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/****************************************************************************
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* apps/graphics/pdcurses/pdc_scroll.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Adapted from the original public domain pdcurses by Gregory Nutt
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****************************************************************************/
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/* Name: scroll
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*
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* Synopsis:
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* int scroll(WINDOW *win);
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* int scrl(int n);
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* int wscrl(WINDOW *win, int n);
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*
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* Description:
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* scroll() causes the window to scroll up one line. This involves
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* moving the lines in the window data structure.
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*
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* With a positive n, scrl() and wscrl() scroll the window up n
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* lines (line i + n becomes i); otherwise they scroll the window
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* down n lines.
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* For these functions to work, scrolling must be enabled via
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* scrollok(). Note also that scrolling is not allowed if the
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* supplied window is a pad.
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*
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* Return Value:
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* All functions return OK on success and ERR on error.
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*
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* Portability X/Open BSD SYS V
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* scroll Y Y Y
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* scrl Y - 4.0
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* wscrl Y - 4.0
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "curspriv.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int wscrl(WINDOW *win, int n)
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{
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chtype blank;
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chtype *temp;
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int dir;
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int start;
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int end;
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int l;
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int i;
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/* Check if window scrolls. Valid for window AND pad */
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if (!win || !win->_scroll || !n)
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{
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return ERR;
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}
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blank = win->_bkgd;
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if (n > 0)
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{
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start = win->_tmarg;
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end = win->_bmarg;
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dir = 1;
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}
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else
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{
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start = win->_bmarg;
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end = win->_tmarg;
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dir = -1;
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}
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for (l = 0; l < (n * dir); l++)
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{
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temp = win->_y[start];
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/* Re-arrange line pointers */
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for (i = start; i != end; i += dir)
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{
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win->_y[i] = win->_y[i + dir];
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}
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win->_y[end] = temp;
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/* Make a blank line */
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for (i = 0; i < win->_maxx; i++)
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{
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*temp++ = blank;
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}
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}
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touchline(win, win->_tmarg, win->_bmarg - win->_tmarg + 1);
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PDC_sync(win);
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return OK;
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}
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int scrl(int n)
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{
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#ifdef CONFIG_PDCURSES_MULTITHREAD
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FAR struct pdc_context_s *ctx = PDC_ctx();
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#endif
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PDC_LOG(("scrl() - called\n"));
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return wscrl(stdscr, n);
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}
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int scroll(WINDOW *win)
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{
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PDC_LOG(("scroll() - called\n"));
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return wscrl(win, 1);
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}
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