int find_line_width(int mode, char *curr, unsigned len)
{
int size = 0;
int width = 0;
int lwidth = 0;
bool done = false;
int tok;
do
{
tok = find_token_length(mode, curr, len, &size, &width);
switch (tok)
{
case TOK_DONE:
case TOK_PARA:
case TOK_NL:
case TOK_FF:
done = true;
break;
case TOK_XONLINE:
case TOK_XDOC:
case TOK_CENTER:
curr += size;
len -= size;
break;
default: /* TOK_SPACE, TOK_LINK or TOK_WORD */
lwidth += width;
curr += size;
len -= size;
break;
}
}
while (!done);
return (lwidth);
}
static void display_parse_text(char far *text, unsigned len, int start_margin, int *num_link, LINK far *link)
{
char far *curr;
int row, col;
int tok;
int size,
width;
textcbase = SCREEN_INDENT;
textrbase = TEXT_START_ROW;
curr = text;
row = 0;
col = 0;
size = width = 0;
if (start_margin >= 0)
tok = TOK_PARA;
else
tok = -1;
for(;;)
{
switch ( tok )
{
case TOK_PARA:
{
int indent,
margin;
if (size > 0)
{
++curr;
indent = *curr++;
margin = *curr++;
len -= 3;
}
else
{
indent = start_margin;
margin = start_margin;
}
col = indent;
for(;;)
{
tok = find_token_length(ONLINE, curr, len, &size, &width);
if (tok == TOK_DONE || tok == TOK_NL || tok == TOK_FF )
break;
if (tok == TOK_PARA)
{
col = 0; /* fake a new-line */
row++;
break;
}
if (tok == TOK_XONLINE || tok == TOK_XDOC)
{
curr += size;
len -= size;
continue;
}
/* now tok is TOK_SPACE or TOK_LINK or TOK_WORD */
if (col+width > SCREEN_WIDTH)
{ /* go to next line... */
col = margin;
++row;
if ( tok == TOK_SPACE )
width = 0; /* skip spaces at start of a line */
}
if (tok == TOK_LINK)
{
display_text(row, col, C_HELP_LINK, curr+1+3*sizeof(int), width);
if (num_link != NULL)
{
link[*num_link].r = (BYTE)row;
link[*num_link].c = (BYTE)col;
link[*num_link].topic_num = getint(curr+1);
link[*num_link].topic_off = getint(curr+1+sizeof(int));
link[*num_link].offset = (unsigned) ((curr+1+3*sizeof(int)) - text);
link[*num_link].width = width;
++(*num_link);
}
}
else if (tok == TOK_WORD )
display_text(row, col, C_HELP_BODY, curr, width);
col += width;
curr += size;
len -= size;
}
width = size = 0;
break;
}
case TOK_CENTER:
col = find_line_width(ONLINE, curr, len);
col = (SCREEN_WIDTH-col)/2;
if (col < 0)
col = 0;
break;
case TOK_NL:
col = 0;
++row;
break;
case TOK_LINK:
display_text(row, col, C_HELP_LINK, curr+1+3*sizeof(int), width);
if (num_link != NULL)
{
link[*num_link].r = (BYTE)row;
link[*num_link].c = (BYTE)col;
link[*num_link].topic_num = getint(curr+1);
link[*num_link].topic_off = getint(curr+1+sizeof(int));
link[*num_link].offset = (unsigned) ((curr+1+3*sizeof(int)) - text);
link[*num_link].width = width;
++(*num_link);
}
break;
case TOK_XONLINE: /* skip */
case TOK_FF: /* ignore */
case TOK_XDOC: /* ignore */
case TOK_DONE:
case TOK_SPACE:
break;
case TOK_WORD:
display_text(row, col, C_HELP_BODY, curr, width);
break;
} /* switch */
curr += size;
len -= size;
col += width;
if (len == 0)
break;
tok = find_token_length(ONLINE, curr, len, &size, &width);
} /* for(;;) */
textcbase = 0;
textrbase = 0;
}
bool process_document(PD_FUNC get_info, PD_FUNC output, VOIDPTR info)
{
int tok;
int size,
width;
int col;
char page_text[10];
PD_INFO pd;
char nl = '\n',
sp = ' ';
bool first_topic;
pd.pnum = 1;
pd.lnum = 0;
output(PD_HEADING, &pd, info);
bool first_section = true;
while (get_info(PD_GET_CONTENT, &pd, info))
{
if (!output(PD_START_SECTION, &pd, info))
return false;
if (pd.new_page && pd.lnum != 0)
{
if (!output(PD_FOOTING, &pd, info))
return false;
++pd.pnum;
pd.lnum = 0;
if (!output(PD_HEADING, &pd, info))
return false;
}
else
{
if (pd.lnum+2 > PAGE_DEPTH-CONTENT_BREAK)
{
if (!output(PD_FOOTING, &pd, info))
return false;
++pd.pnum;
pd.lnum = 0;
if (!output(PD_HEADING, &pd, info))
return false;
}
else if (pd.lnum > 0)
{
if (!DO_PRINTN(nl, 2))
return false;
pd.lnum += 2;
}
}
if (!output(PD_SET_SECTION_PAGE, &pd, info))
return false;
if (!first_section)
{
if (!output(PD_PRINT_SEC, &pd, info))
return false;
++pd.lnum;
}
first_topic = true;
bool skip_blanks;
while (get_info(PD_GET_TOPIC, &pd, info))
{
if (!output(PD_START_TOPIC, &pd, info))
return false;
skip_blanks = false;
col = 0;
if (!first_section) /* do not skip blanks for DocContents */
{
while (pd.len > 0)
{
tok = find_token_length(DOC, pd.curr, pd.len, &size, nullptr);
if (tok != TOK_XDOC && tok != TOK_XONLINE &&
tok != TOK_NL && tok != TOK_DONE)
break;
pd.curr += size;
pd.len -= size;
}
if (first_topic && pd.len != 0)
{
if (!DO_PRINTN(nl, 1))
return false;
++pd.lnum;
}
}
if (pd.lnum > PAGE_DEPTH-TOPIC_BREAK)
{
if (!output(PD_FOOTING, &pd, info))
return false;
++pd.pnum;
pd.lnum = 0;
if (!output(PD_HEADING, &pd, info))
return false;
}
else if (!first_topic)
{
if (!DO_PRINTN(nl, 1))
return false;
pd.lnum++;
}
if (!output(PD_SET_TOPIC_PAGE, &pd, info))
return false;
do
{
if (!output(PD_PERIODIC, &pd, info))
return false;
tok = find_token_length(DOC, pd.curr, pd.len, &size, &width);
switch (tok)
{
case TOK_PARA:
{
int indent,
margin;
unsigned holdlen = 0;
char *holdcurr = 0;
int in_link = 0;
++pd.curr;
indent = *pd.curr++;
margin = *pd.curr++;
pd.len -= 3;
if (!DO_PRINTN(sp, indent))
return false;
col = indent;
while (true)
{
if (!output(PD_PERIODIC, &pd, info))
return false;
tok = find_token_length(DOC, pd.curr, pd.len, &size, &width);
if (tok == TOK_NL || tok == TOK_FF)
break;
if (tok == TOK_DONE)
{
if (in_link == 0)
{
col = 0;
++pd.lnum;
if (!DO_PRINTN(nl, 1))
return false;
break;
}
else if (in_link == 1)
{
tok = TOK_SPACE;
width = 1;
size = 0;
++in_link;
}
else if (in_link == 2)
{
tok = TOK_WORD;
width = (int) strlen(page_text);
col += 8 - width;
size = 0;
pd.curr = page_text;
++in_link;
}
else if (in_link == 3)
{
pd.curr = holdcurr;
pd.len = holdlen;
in_link = 0;
continue;
}
}
if (tok == TOK_PARA)
{
col = 0; /* fake a nl */
++pd.lnum;
if (!DO_PRINTN(nl, 1))
return false;
break;
}
if (tok == TOK_XONLINE || tok == TOK_XDOC)
{
pd.curr += size;
pd.len -= size;
continue;
}
if (tok == TOK_LINK)
{
pd.s = pd.curr+1;
if (get_info(PD_GET_LINK_PAGE, &pd, info))
{
in_link = 1;
sprintf(page_text, "(p. %d)", pd.i);
}
else
in_link = 3;
holdcurr = pd.curr + size;
holdlen = pd.len - size;
pd.len = size - 2 - 3*sizeof(int);
pd.curr += 1 + 3*sizeof(int);
continue;
}
/* now tok is TOK_SPACE or TOK_WORD */
if (col+width > PAGE_WIDTH)
{ /* go to next line... */
if (!DO_PRINTN(nl, 1))
return false;
if (++pd.lnum >= PAGE_DEPTH)
{
if (!output(PD_FOOTING, &pd, info))
return false;
++pd.pnum;
pd.lnum = 0;
if (!output(PD_HEADING, &pd, info))
return false;
}
if (tok == TOK_SPACE)
width = 0; /* skip spaces at start of a line */
if (!DO_PRINTN(sp, margin))
return false;
col = margin;
}
if (width > 0)
{
if (tok == TOK_SPACE)
{
if (!DO_PRINTN(sp, width))
return false;
}
else
{
if (!DO_PRINT(pd.curr, (size == 0) ? width : size))
return false;
}
}
col += width;
pd.curr += size;
pd.len -= size;
}
skip_blanks = false;
size = 0;
width = size;
break;
}
case TOK_NL:
if (skip_blanks && col == 0)
break;
++pd.lnum;
if (pd.lnum >= PAGE_DEPTH || (col == 0 && pd.lnum >= PAGE_DEPTH-BLANK_BREAK))
{
if (col != 0) /* if last wasn't a blank line... */
{
if (!DO_PRINTN(nl, 1))
return false;
}
if (!output(PD_FOOTING, &pd, info))
return false;
++pd.pnum;
pd.lnum = 0;
skip_blanks = true;
if (!output(PD_HEADING, &pd, info))
return false;
}
else
{
if (!DO_PRINTN(nl, 1))
return false;
}
col = 0;
break;
case TOK_FF:
if (skip_blanks)
break;
if (!output(PD_FOOTING, &pd, info))
return false;
col = 0;
pd.lnum = 0;
++pd.pnum;
if (!output(PD_HEADING, &pd, info))
return false;
break;
case TOK_CENTER:
width = (PAGE_WIDTH - find_line_width(DOC, pd.curr, pd.len)) / 2;
if (!DO_PRINTN(sp, width))
return false;
break;
case TOK_LINK:
skip_blanks = false;
if (!DO_PRINT(pd.curr+1+3*sizeof(int),
size-3*sizeof(int)-2))
return false;
pd.s = pd.curr+1;
if (get_info(PD_GET_LINK_PAGE, &pd, info))
{
width += 9;
sprintf(page_text, " (p. %d)", pd.i);
if (!DO_PRINT(page_text, (int) strlen(page_text)))
return false;
}
break;
case TOK_WORD:
skip_blanks = false;
if (!DO_PRINT(pd.curr, size))
return false;
break;
case TOK_SPACE:
skip_blanks = false;
if (!DO_PRINTN(sp, width))
return false;
break;
case TOK_DONE:
case TOK_XONLINE: /* skip */
case TOK_XDOC: /* ignore */
break;
} /* switch */
pd.curr += size;
pd.len -= size;
col += width;
}
while (pd.len > 0);
get_info(PD_RELEASE_TOPIC, &pd, info);
first_topic = false;
} /* while */
first_section = false;
} /* while */
if (!output(PD_FOOTING, &pd, info))
return false;
return true;
}
