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/*
* $Id: filter.h 1169 2008-08-27 06:42:06Z hubert@u.washington.edu $
*
* ========================================================================
* Copyright 2013-2020 Eduardo Chappa
* Copyright 2006-2007 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#ifndef PITH_FILTER_INCLUDED
#define PITH_FILTER_INCLUDED
#include "../pith/filttype.h"
#include "../pith/handle.h"
#include "../pith/store.h"
#include "../pith/osdep/pipe.h"
/* gf_html2plain flags */
#define GFHP_STRIPPED 0x01
#define GFHP_HANDLES 0x02
#define GFHP_LOCAL_HANDLES 0x04
#define GFHP_NO_RELATIVE 0x08
#define GFHP_RELATED_CONTENT 0x10
#define GFHP_SHOW_SERVER 0x20
#define GFHP_HTML 0x40
#define GFHP_HTML_IMAGES 0x80
/* gf_wrap flags */
#define GFW_NONE 0x000 /* no flags */
#define GFW_HANDLES 0x001 /* anticipate handle data */
#define GFW_ONCOMMA 0x002 /* prefer comma wrap to spaces */
#define GFW_FLOWED 0x004
#define GFW_FLOW_RESULT 0x008
#define GFW_DELSP 0x010
#define GFW_USECOLOR 0x020
#define GFW_HDRCOLOR 0x040
#define GFW_FORCOMPOSE 0x080
#define GFW_SOFTHYPHEN 0x100 /* do something special with soft-hyphens */
/* gf_url_hilite flags */
#define URH_NONE 0x00 /* no flags */
#define URH_HDRCOLOR 0x01 /* in header, use header base color */
#define TAG_EMBED '\377' /* Announces embedded data in text string */
#define TAG_INVON 'A' /* Supported character attributes */
#define TAG_INVOFF 'a'
#define TAG_BOLDON 'B'
#define TAG_BOLDOFF 'b'
#define TAG_ULINEON 'C'
#define TAG_ULINEOFF 'c'
#define TAG_FGCOLOR 'D' /* Change to this foreground color */
#define TAG_BGCOLOR 'd' /* Change to this background color */
#define TAG_ITALICON 'E'
#define TAG_ITALICOFF 'e'
#define TAG_STRIKEON 'F'
#define TAG_STRIKEOFF 'f'
#define TAG_BIGON 'G'
#define TAG_BIGOFF 'g'
#define TAG_SMALLON 'H'
#define TAG_SMALLOFF 'h'
#define TAG_HANDLE 'Z' /* indicate's a handle to an action */
#define TAG_HANDLEOFF 'z' /* indicate's end of handle text */
typedef struct url_hilite_s {
HANDLE_S **handlesp;
int hdr_color;
} URL_HILITE_S;
typedef struct _rss_item_s {
char *title;
char *link;
char *description;
char *source;
struct _rss_item_s *next;
} RSS_ITEM_S;
typedef struct _rss_feed_s {
char *title;
char *image;
char *link;
char *description;
char *source;
int ttl;
struct _rss_item_s *items;
} RSS_FEED_S;
/*
* This searches for lines beginning with From<space> so that we can QP-encode
* them. It also searches for lines consisting of only a dot. Some mailers
* will mangle these lines. The reason it is ifdef'd is because most people
* seem to prefer the >From style escape provided by a lot of mail software
* to the QP-encoding.
* Froms, dots, bmap, and dmap may be any integer type. C is the next char.
* bmap and dmap should be initialized to 1.
* froms is incremented by 1 whenever a line beginning From_ is found.
* dots is incremented by 1 whenever a line with only a dot is found.
*/
#define Find_Froms(froms,dots,bmap,dmap,c) { int x,y; \
switch (c) { \
case '\n': case '\r': \
x = 0x1; \
y = 0x7; \
bmap = 0; \
break; \
case 'F': \
x = 0x3; \
y = 0; \
break; \
case 'r': \
x = 0x7; \
y = 0; \
break; \
case 'o': \
x = 0xf; \
y = 0; \
break; \
case 'm': \
x = 0x1f; \
y = 0; \
break; \
case ' ': \
x = 0x3f; \
y = 0; \
break; \
case '.': \
x = 0; \
y = 0x3; \
break; \
default: \
x = 0; \
y = 0; \
break; \
} \
bmap = ((x >> 1) == bmap) ? x : 0; \
froms += (bmap == 0x3f ? 1 : 0); \
if(y == 0x7 && dmap != 0x3){ \
y = 0x1; \
dmap = 0; \
} \
dmap = ((y >> 1) == dmap) ? y : 0; \
dots += (dmap == 0x7 ? 1 : 0); \
}
/* exported prototypes */
int generic_readc_locale(unsigned char *c,
int (*get_a_char)(unsigned char *, void *),
void *extraarg,
CBUF_S *cb);
int pc_is_picotext(gf_io_t);
void gf_set_readc(gf_io_t *, void *, unsigned long, SourceType, int);
void gf_set_writec(gf_io_t *, void *, unsigned long, SourceType, int);
void gf_set_so_readc(gf_io_t *, STORE_S *);
void gf_clear_so_readc(STORE_S *);
void gf_set_so_writec(gf_io_t *, STORE_S *);
void gf_clear_so_writec(STORE_S *);
int gf_puts(char *, gf_io_t);
int gf_nputs(char *, long, gf_io_t);
void gf_filter_init(void);
void gf_link_filter(filter_t, void *);
void gf_set_terminal(gf_io_t);
char *gf_pipe(gf_io_t, gf_io_t);
long gf_bytes_piped(void);
char *gf_filter(char *, char *, STORE_S *, gf_io_t, FILTLIST_S *, int,
int, void (*)(PIPE_S *, int, void *));
void gf_binary_b64(FILTER_S *, int);
void gf_b64_binary(FILTER_S *, int);
void gf_qp_8bit(FILTER_S *, int);
void gf_8bit_qp(FILTER_S *, int);
void gf_convert_8bit_charset(FILTER_S *, int);
void gf_convert_utf8_charset(FILTER_S *, int);
void *gf_convert_utf8_charset_opt(void *, int);
void gf_2022_jp_to_euc(FILTER_S *, int);
void gf_native8bitjapanese_to_2022_jp(FILTER_S *, int);
void gf_euc_to_2022_jp(FILTER_S *, int);
void gf_sjis_to_2022_jp(FILTER_S *, int);
void gf_utf8(FILTER_S *, int);
void *gf_utf8_opt(char *);
void gf_rich2plain(FILTER_S *, int);
void *gf_rich2plain_opt(int *);
void gf_enriched2plain(FILTER_S *, int);
void *gf_enriched2plain_opt(int *);
void gf_html2plain(FILTER_S *, int);
void *gf_html2plain_opt(char *, int, int *, HANDLE_S **, htmlrisk_t, int);
void *gf_html2plain_rss_opt(RSS_FEED_S **, int);
void gf_html2plain_rss_free(RSS_FEED_S **);
void gf_html2plain_rss_free_items(RSS_ITEM_S **);
void gf_escape_filter(FILTER_S *, int);
void gf_html_cid2file(FILTER_S *, int);
void gf_control_filter(FILTER_S *, int);
void *gf_control_filter_opt(int *);
void gf_tag_filter(FILTER_S *, int);
void gf_wrap(FILTER_S *, int);
void *gf_wrap_filter_opt(int, int, int *, int, int);
void gf_preflow(FILTER_S *, int);
void gf_prefix(FILTER_S *, int);
void *gf_prefix_opt(char *);
void gf_line_test(FILTER_S *, int);
void *gf_line_test_opt(linetest_t, void *);
LT_INS_S **gf_line_test_new_ins(LT_INS_S **, char *, char *, int);
void gf_line_test_free_ins(LT_INS_S **);
void gf_prepend_editorial(FILTER_S *, int);
void *gf_prepend_editorial_opt(prepedtest_t, char *);
void gf_nvtnl_local(FILTER_S *, int);
void gf_local_nvtnl(FILTER_S *, int);
void *gf_url_hilite_opt(URL_HILITE_S *, HANDLE_S **, int);
void free_filter_module_globals(void);
#endif /* PITH_FILTER_INCLUDED */
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