343 lines
8.1 KiB
C
343 lines
8.1 KiB
C
/*
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* msgbox.c -- implements the message box and info box
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*
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* AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <dialog.h>
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#include "dialog.priv.h"
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/* local prototypes */
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static int getnlines(unsigned char *buf);
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static void print_page(WINDOW *win, int height, int width, unsigned char *buf, int startline, int hscroll);
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static void print_perc(WINDOW *win, int y, int x, float p);
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/*
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* Display a message box. Program will pause and display an "OK" button
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* if the parameter 'pause' is non-zero.
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*/
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int dialog_msgbox(unsigned char *title, unsigned char *prompt, int height, int width, int pause)
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{
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int i, j, x, y, key = 0;
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WINDOW *dialog;
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if (height < 0)
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height = strheight(prompt)+2+2*(!!pause);
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if (width < 0) {
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i = strwidth(prompt);
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j = ((title != NULL) ? strwidth(title) : 0);
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width = MAX(i,j)+4;
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}
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if (pause)
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width = MAX(width,10);
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if (width > COLS)
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width = COLS;
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if (height > LINES)
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height = LINES;
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/* center dialog box on screen */
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x = (COLS - width)/2;
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y = (LINES - height)/2;
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#ifdef HAVE_NCURSES
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if (use_shadow)
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draw_shadow(stdscr, y, x, height, width);
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#endif
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dialog = newwin(height, width, y, x);
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if (dialog == NULL) {
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endwin();
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fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x);
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exit(1);
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}
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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if (title != NULL) {
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wattrset(dialog, title_attr);
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wmove(dialog, 0, (width - strlen(title))/2 - 1);
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waddch(dialog, ' ');
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waddstr(dialog, title);
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waddch(dialog, ' ');
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}
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wattrset(dialog, dialog_attr);
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wmove(dialog, 1, 2);
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print_autowrap(dialog, prompt, height-1, width-2, width, 1, 2, TRUE, FALSE);
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if (pause) {
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wattrset(dialog, border_attr);
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wmove(dialog, height-3, 0);
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waddch(dialog, ACS_LTEE);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dialog_attr);
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waddch(dialog, ACS_RTEE);
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wmove(dialog, height-2, 1);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ' ');
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display_helpline(dialog, height-1, width);
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print_button(dialog, " OK ", height-2, width/2-4, TRUE);
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wrefresh(dialog);
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while (key != ESC && key != '\n' && key != ' ' && key != '\r')
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key = wgetch(dialog);
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if (key == '\r')
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key = '\n';
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}
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else {
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key = '\n';
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wrefresh(dialog);
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}
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delwin(dialog);
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return (key == ESC ? -1 : 0);
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}
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/* End of dialog_msgbox() */
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int
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dialog_mesgbox(unsigned char *title, unsigned char *prompt, int height, int width)
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/*
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* Desc: basically the same as dialog_msgbox, but ... can use PGUP, PGDN and
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* arrowkeys to move around the text and pause is always enabled
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*/
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{
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int i, j, x, y, key=0;
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int theight, startline, hscroll, max_lines;
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WINDOW *dialog;
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if (height < 0)
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height = strheight(prompt)+2+2;
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if (width < 0) {
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i = strwidth(prompt);
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j = ((title != NULL) ? strwidth(title) : 0);
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width = MAX(i,j)+4;
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}
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width = MAX(width,10);
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if (width > COLS)
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width = COLS;
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if (height > LINES)
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height = LINES;
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/* center dialog box on screen */
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x = (COLS - width)/2;
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y = (LINES - height)/2;
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#ifdef HAVE_NCURSES
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if (use_shadow)
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draw_shadow(stdscr, y, x, height, width);
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#endif
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dialog = newwin(height, width, y, x);
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if (dialog == NULL) {
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endwin();
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fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x);
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exit(1);
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}
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keypad(dialog, TRUE);
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draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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if (title != NULL) {
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wattrset(dialog, title_attr);
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wmove(dialog, 0, (width - strlen(title))/2 - 1);
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waddch(dialog, ' ');
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waddstr(dialog, title);
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waddch(dialog, ' ');
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}
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wattrset(dialog, border_attr);
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wmove(dialog, height-3, 0);
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waddch(dialog, ACS_LTEE);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ACS_HLINE);
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wattrset(dialog, dialog_attr);
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waddch(dialog, ACS_RTEE);
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wmove(dialog, height-2, 1);
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for (i = 0; i < width-2; i++)
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waddch(dialog, ' ');
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display_helpline(dialog, height-1, width);
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print_button(dialog, " EXIT ", height-2, width/2-4, TRUE);
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wattrset(dialog, dialog_attr);
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theight = height - 4;
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startline = 0;
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hscroll = 0;
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max_lines = getnlines(prompt);
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print_page(dialog, theight, width, prompt, startline, hscroll);
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print_perc(dialog, height-3, width-9, (float) (startline+theight)/max_lines);
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wmove(dialog, height-2, width/2-2);
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wrefresh(dialog);
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while ((key != ESC) && (key != '\n') && (key != '\r')) {
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key = wgetch(dialog);
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switch(key) {
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case KEY_HOME:
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startline=0;
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hscroll=0;
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break;
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case KEY_END:
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startline = max_lines - theight;
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if (startline < 0) startline = 0;
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break;
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case KEY_UP:
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if (startline > 0) startline--;
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break;
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case KEY_DOWN:
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if (startline < max_lines - theight) startline++;
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break;
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case KEY_RIGHT:
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hscroll+=5;
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break;
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case KEY_LEFT:
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if (hscroll > 0) hscroll-=5;
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if (hscroll < 0) hscroll =0;
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break;
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case KEY_PPAGE:
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if (startline - height > 0) {
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startline -= theight;
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} else {
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startline = 0;
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}
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break;
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case KEY_NPAGE:
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if (startline + theight < max_lines - theight) {
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startline += theight;
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} else {
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startline = max_lines - theight;
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if (startline < 0) startline = 0;
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}
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break;
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case KEY_F(1):
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case '?':
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display_helpfile();
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break;
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}
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print_page(dialog, theight, width, prompt, startline, hscroll);
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print_perc(dialog, height-3, width-9, (float) (startline+theight)/max_lines);
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wmove(dialog, height-2, width/2-2);
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wrefresh(dialog);
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}
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delwin(dialog);
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return (key == ESC ? -1 : 0);
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} /* dialog_mesgbox() */
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static void
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print_perc(WINDOW *win, int y, int x, float p)
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/*
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* Desc: print p as a percentage at the coordinates (y,x)
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*/
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{
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char ps[10];
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if (p>1.0) p=1.0;
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sprintf(ps, "(%3d%%)", (int) (p*100));
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wmove(win, y, x);
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waddstr(win, ps);
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return;
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} /* print_perc() */
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static int
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getnlines(unsigned char *buf)
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/*
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* Desc: count the # of lines in <buf>
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*/
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{
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int i = 0;
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if (*buf)
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i++;
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while (*buf) {
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if (*buf == '\n' || *buf == '\r')
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i++;
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buf++;
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}
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return(i);
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} /* getlines() */
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unsigned char *
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getline(unsigned char *buf, int n)
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/*
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* Desc: return a pointer to the n'th line in <buf> or NULL if its
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* not there
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*/
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{
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int i;
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if (n<0) {
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return(NULL);
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}
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i=0;
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while (*buf && i<n) {
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if (*buf == '\n' || *buf == '\r') {
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i++;
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}
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buf++;
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}
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if (i<n) {
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return(NULL);
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} else {
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return(buf);
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}
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} /* getline() */
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static void
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print_page(WINDOW *win, int height, int width, unsigned char *buf, int startline, int hscroll)
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/*
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* Desc: Print a page of text in the current window, starting at line <startline>
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* with a <horizontal> scroll of hscroll from buffer <buf>
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*/
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{
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int i, j;
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unsigned char *b;
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b = getline(buf, startline);
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for (i=0; i<height; i++) {
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/* clear line */
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wmove(win, 1+i, 1);
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for (j=0; j<width-2; j++) waddnstr(win, " ", 1);
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wmove(win, 1+i, 1);
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j = 0;
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/* scroll to the right */
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while (*b && (*b != '\n') && (*b != '\r') && (j<hscroll)) {
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b++;
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j++;
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}
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/* print new line */
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j = 0;
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while (*b && (*b != '\n') && (*b != '\r') && (j<width-2)) {
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waddnstr(win, b, 1);
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if (*b != '\t') { /* check for tabs */
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j++;
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} else {
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j = ((int) (j+1)/8 + 1) * 8 - 1;
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}
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b++;
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}
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while (*b && (*b != '\n') && (*b != '\r')) b++;
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if (*b) b++; /* skip over '\n', if it exists */
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}
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} /* print_page() */
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