+/****************************************************************************
+ * Copyright (c) 2017 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+/*
+ * $Id: popup_msg.c,v 1.7 2017/04/15 19:16:41 tom Exp $
+ *
+ * Show a multi-line message in a window which may extend beyond the screen.
+ *
+ * Thomas Dickey - 2017/4/15.
+ */
+
+#include <test.priv.h>
+
+#include <popup_msg.h>
+
+static WINDOW *old_window;
+
+static void
+begin_popup(void)
+{
+ doupdate();
+ old_window = dupwin(curscr);
+}
+
+static void
+end_popup(void)
+{
+ touchwin(old_window);
+ wnoutrefresh(old_window);
+ doupdate();
+ delwin(old_window);
+}
+
+/*
+ * Display a temporary window, e.g., to display a help-message.
+ */
+void
+popup_msg(WINDOW *parent, const char *const *msg)
+{
+ int x0 = 4;
+ int y0 = 2;
+ int y1 = 0;
+ int y2 = 0;
+ int wide = getmaxx(parent) - ((x0 + 1) * 2);
+ int high = getmaxy(parent) - ((y0 + 1) * 2);
+ WINDOW *help;
+ WINDOW *data;
+ int n;
+ int width = 0;
+ int length;
+ int last_y;
+ int ch = ERR;
+
+ for (n = 0; msg[n] != 0; ++n) {
+ int check = (int) strlen(msg[n]);
+ if (width < check)
+ width = check;
+ }
+ length = n;
+
+ if ((help = newwin(high, wide, y0, x0)) == 0)
+ return;
+ if ((data = newpad(length + 1, width)) == 0)
+ return;
+
+ begin_popup();
+
+ keypad(data, TRUE);
+
+ for (n = 0; n < length; ++n) {
+ waddstr(data, msg[n]);
+ if ((n + 1) < length) {
+ waddch(data, '\n');
+ }
+ }
+ y2 = getcury(data);
+ last_y = (y2 - (high - 3));
+
+ do {
+ switch (ch) {
+ case KEY_HOME:
+ y1 = 0;
+ break;
+ case KEY_END:
+ y1 = last_y;
+ break;
+ case KEY_PREVIOUS:
+ case KEY_PPAGE:
+ if (y1 > 0) {
+ y1 -= high / 2;
+ if (y1 < 0)
+ y1 = 0;
+ } else {
+ beep();
+ }
+ break;
+ case KEY_NEXT:
+ case KEY_NPAGE:
+ if (y1 < last_y) {
+ y1 += high / 2;
+ if (y1 > last_y)
+ y1 = last_y;
+ } else {
+ beep();
+ }
+ break;
+ case CTRL('P'):
+ case KEY_UP:
+ if (y1 > 0)
+ --y1;
+ else
+ beep();
+ break;
+ case CTRL('N'):
+ case KEY_DOWN:
+ if (y1 < last_y)
+ ++y1;
+ else
+ beep();
+ break;
+ default:
+ beep();
+ break;
+ case ERR:
+ break;
+ }
+ werase(help);
+ box(help, 0, 0);
+ wnoutrefresh(help);
+ pnoutrefresh(data, y1, 0, y0 + 1, x0 + 1, high, wide);
+ doupdate();
+ } while ((ch = wgetch(data)) != ERR && ch != QUIT && ch != ESCAPE);
+ werase(help);
+ wrefresh(help);
+ delwin(help);
+ delwin(data);
+
+ end_popup();
+}
+
+void
+popup_msg2(WINDOW *parent, char **msg)
+{
+ popup_msg(parent, (const char *const *) msg);
+}
projects / ncurses.git / commitdiff