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|
/*
| help.c
|
| $Header: /home/hugh/sources/aee/RCS/help.c,v 1.9 1999/02/01 04:28:08 hugh Exp hugh $
*/
/*
| Copyright (c) 1986 - 1988, 1991 - 1995, 1999 Hugh Mahon.
*/
#include "aee.h"
char *help_file_list[4] = {
"/usr/local/aee/help.ae",
"/usr/local/lib/help.ae",
"/usr/lib/aee/help.ae",
"~/.help.ae",
"help.ae"
};
void
help() /* help function */
{
int counter;
char *string;
go_on = TRUE;
if ((fp = fopen(ae_help_file, "r")) == NULL)
{
for (counter = 0; (counter < 4) && (fp == NULL); counter++)
{
string = resolve_name(help_file_list[counter]);
fp = fopen(string, "r");
}
if (fp == NULL)
{
wmove(com_win, 0, 0);
werase(com_win);
wprintw(com_win, help_err_msg, ae_help_file);
wrefresh(com_win);
clr_cmd_line = TRUE;
go_on = FALSE;
}
}
if (go_on)
{
help_win = newwin(LINES-1, COLS, 0, 0);
if ((windows) && (num_of_bufs > 1))
{
t_buff = first_buff;
while (t_buff != NULL)
{
werase(t_buff->win);
wrefresh(t_buff->win);
werase(t_buff->footer);
wrefresh(t_buff->footer);
t_buff = t_buff->next_buff;
}
}
else
{
werase(curr_buff->win);
wrefresh(curr_buff->win);
}
help_line = xalloc(512);
do
{
outfile();
ask();
}
while (go_on);
free(help_line);
werase(help_win);
wrefresh(help_win);
delwin(help_win);
paint_info_win();
new_screen();
clr_cmd_line = TRUE;
}
}
void
outfile() /* output data from help file until a form-feed (separator of subjects) */
{
char *prompt;
int counter;
int scroll_flag = FALSE;
counter = 0;
werase(help_win);
wmove(help_win,0,0);
while (((sline = fgets(help_line, 512, fp)) != NULL) && (*sline != 12))
{
counter++;
if (counter == LINES)
{
wrefresh(help_win);
prompt = get_string(prompt_for_more, FALSE);
if (prompt != NULL)
free(prompt);
scroll_flag = TRUE;
counter = 0;
}
if (scroll_flag)
{
wmove(help_win, 0, 0);
wdeleteln(help_win);
wmove(help_win, (LINES - 2), 0);
}
wprintw(help_win, "%s", sline);
}
wrefresh(help_win);
}
void
ask() /* prompt user what help topic do they wish to learn about */
{
char *topic;
char *tline;
topic = get_string(topic_prompt, FALSE);
if (*topic == (char) NULL)
go_on = FALSE;
else if (*topic != 9)
{
rewind(fp);
do
{
tline = sline = fgets(help_line, 512, fp);
if (tline != NULL)
{
while ((*tline != '\n') && (*tline != (char) NULL))
tline++;
*tline = (char) NULL;
}
}
while ((sline != NULL) && (strncmp(sline, topic, strlen(topic))));
if (sline == NULL)
{
wmove(help_win, LINES -2, 0);
wclrtoeol(help_win);
wstandout(help_win);
wprintw(help_win, topic_err_msg, topic);
wstandend(help_win);
wrefresh(help_win);
rewind(fp);
free(topic);
topic = get_string(continue_prompt, TRUE);
}
else
tline = sline = fgets(help_line, 512, fp);
}
else if (*topic == '\t')
rewind(fp);
free(topic);
}
|
