text: /*
   *  $Id: pause.c,v 1.46 2020/03/27 20:32:55 tom Exp $
   *
   *  pause.c -- implements the pause dialog
   *
   *  Copyright 2004-2019,2020	Thomas E. Dickey
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU Lesser General Public License, version 2.1
   *  as published by the Free Software Foundation.
   *
   *  This program is distributed in the hope that it will be useful, but
   *  WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  Lesser General Public License for more details.
   *
   *  You should have received a copy of the GNU Lesser General Public
   *  License along with this program; if not, write to
   *	Free Software Foundation, Inc.
   *	51 Franklin St., Fifth Floor
   *	Boston, MA 02110, USA.
   *
   *  This is adapted from source contributed by
   *	Yura Kalinichenko
   */
  
  #include <dialog.h>
  #include <dlg_keys.h>
  
  #define MY_TIMEOUT 50
  
  #define MIN_HIGH (4)
  #define MIN_WIDE (10 + 2 * (2 + MARGIN))
  #define BTN_HIGH (1 + 2 * MARGIN)
  
  /*
   * This is like gauge, but can be interrupted.
   *
   * A pause box displays a meter along the bottom of the box.  The meter
   * indicates how many seconds remain until the end of the pause.  The pause
   * exits when timeout is reached (status OK) or the user presses:
   *   OK button (status OK) 
   *   CANCEL button (status CANCEL)
   *   Esc key (status ESC)
   *
   */
  int
  dialog_pause(const char *title,
  	     const char *cprompt,
  	     int height,
  	     int width,
  	     int seconds)
  {
      /* *INDENT-OFF* */
      static DLG_KEYS_BINDING binding[] = {
  	HELPKEY_BINDINGS,
  	ENTERKEY_BINDINGS,
  	TRAVERSE_BINDINGS,
  	END_KEYS_BINDING
      };
      /* *INDENT-ON* */
  
  #ifdef KEY_RESIZE
      int old_height = height;
      int old_width = width;
  #endif
  
      int i, x, y, step;
      int button = dlg_default_button();
      int seconds_orig;
      WINDOW *dialog;
      const char **buttons = dlg_ok_labels();
      bool have_buttons = (dlg_button_count(buttons) != 0);
      bool first;
      int key, fkey;
      int result = DLG_EXIT_UNKNOWN;
      int button_high = (have_buttons ? BTN_HIGH : MARGIN);
      int gauge_y;
      char *prompt;
      int save_timeout = dialog_vars.timeout_secs;
  
      DLG_TRACE(("# pause args:\n"));
      DLG_TRACE2S("title", title);
      DLG_TRACE2S("message", cprompt);
      DLG_TRACE2N("height", height);
      DLG_TRACE2N("width", width);
      DLG_TRACE2N("seconds", seconds);
  
      curs_set(0);
  
      dialog_vars.timeout_secs = 0;
      seconds_orig = (seconds > 0) ? seconds : 1;
  
  #ifdef KEY_RESIZE
    retry:
  #endif
  
      prompt = dlg_strclone(cprompt);
      dlg_tab_correct_str(prompt);
  
      if (have_buttons) {
  	dlg_auto_size(title, prompt, &height, &width,
  		      MIN_HIGH,
  		      MIN_WIDE);
  	dlg_button_layout(buttons, &width);
      } else {
  	dlg_auto_size(title, prompt, &height, &width,
  		      MIN_HIGH + MARGIN - BTN_HIGH,
  		      MIN_WIDE);
      }
      gauge_y = height - button_high - (1 + 2 * MARGIN);
      dlg_print_size(height, width);
      dlg_ctl_size(height, width);
  
      /* center dialog box on screen */
      x = dlg_box_x_ordinate(width);
      y = dlg_box_y_ordinate(height);
  
      dialog = dlg_new_window(height, width, y, x);
      dlg_register_window(dialog, "pause", binding);
      dlg_register_buttons(dialog, "pause", buttons);
  
      dlg_mouse_setbase(x, y);
      nodelay(dialog, TRUE);
  
      first = TRUE;
      do {
  	(void) werase(dialog);
  	dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
  
  	dlg_draw_title(dialog, title);
  	dlg_draw_helpline(dialog, FALSE);
  
  	dlg_attrset(dialog, dialog_attr);
  	dlg_print_autowrap(dialog, prompt, height, width);
  
  	dlg_draw_box2(dialog,
  		      gauge_y, 2 + MARGIN,
  		      2 + MARGIN, width - 2 * (2 + MARGIN),
  		      dialog_attr,
  		      border_attr,
  		      border2_attr);
  
  	/*
  	 * Clear the area for the progress bar by filling it with spaces
  	 * in the title-attribute, and write the percentage with that
  	 * attribute.
  	 */
  	(void) wmove(dialog, gauge_y + MARGIN, 4);
  	dlg_attrset(dialog, title_attr);
  
  	for (i = 0; i < (width - 2 * (3 + MARGIN)); i++)
  	    (void) waddch(dialog, ' ');
  
  	(void) wmove(dialog, gauge_y + MARGIN, (width / 2) - 2);
  	(void) wprintw(dialog, "%3d", seconds);
  
  	/*
  	 * Now draw a bar in reverse, relative to the background.
  	 * The window attribute was useful for painting the background,
  	 * but requires some tweaks to reverse it.
  	 */
  	x = (seconds * (width - 2 * (3 + MARGIN))) / seconds_orig;
  	if ((title_attr & A_REVERSE) != 0) {
  	    dlg_attroff(dialog, A_REVERSE);
  	} else {
  	    dlg_attrset(dialog, A_REVERSE);
  	}
  	(void) wmove(dialog, gauge_y + MARGIN, 4);
  	for (i = 0; i < x; i++) {
  	    chtype ch = winch(dialog);
  	    if (title_attr & A_REVERSE) {
  		ch &= ~A_REVERSE;
  	    }
  	    (void) waddch(dialog, ch);
  	}
  
  	mouse_mkbutton(height - 2, width / 2 - 4, 6, '\n');
  	if (have_buttons) {
  	    dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
  	    dlg_draw_buttons(dialog, height - 2, 0, buttons, button, FALSE, width);
  	}
  	if (first) {
  	    (void) wrefresh(dialog);
  	    dlg_trace_win(dialog);
  	    first = FALSE;
  	}
  
  	for (step = 0;
  	     (result == DLG_EXIT_UNKNOWN) && (step < 1000);
  	     step += MY_TIMEOUT) {
  
  	    napms(MY_TIMEOUT);
  	    key = dlg_mouse_wgetch_nowait(dialog, &fkey);
  	    if (key == ERR) {
  		;		/* ignore errors in nodelay mode */
  	    } else if (dlg_result_key(key, fkey, &result)) {
  		if (!dlg_button_key(result, &button, &key, &fkey))
  		    break;
  	    }
  
  	    switch (key) {
  #ifdef KEY_RESIZE
  	    case KEY_RESIZE:
  		dlg_will_resize(dialog);
  		height = old_height;
  		width = old_width;
  		free(prompt);
  		_dlg_resize_cleanup(dialog);
  		goto retry;
  #endif
  	    case DLGK_FIELD_NEXT:
  		button = dlg_next_button(buttons, button);
  		if (button < 0)
  		    button = 0;
  		dlg_draw_buttons(dialog,
  				 height - 2, 0,
  				 buttons, button,
  				 FALSE, width);
  		break;
  	    case DLGK_FIELD_PREV:
  		button = dlg_prev_button(buttons, button);
  		if (button < 0)
  		    button = 0;
  		dlg_draw_buttons(dialog,
  				 height - 2, 0,
  				 buttons, button,
  				 FALSE, width);
  		break;
  	    case DLGK_ENTER:
  		result = dlg_enter_buttoncode(button);
  		break;
  	    case ERR:
  		break;
  	    default:
  		if (is_DLGK_MOUSE(key)) {
  		    result = dlg_ok_buttoncode(key - M_EVENT);
  		    if (result < 0)
  			result = DLG_EXIT_OK;
  		}
  		break;
  	    }
  	}
      } while ((result == DLG_EXIT_UNKNOWN) && (seconds-- > 0));
      dlg_add_last_key(-1);
  
      curs_set(1);
      dlg_mouse_free_regions();
      dlg_del_window(dialog);
      free(prompt);
  
      dialog_vars.timeout_secs = save_timeout;
  
      return ((result == DLG_EXIT_UNKNOWN) ? DLG_EXIT_OK : result);
  }
  