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html.c
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html.c
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/* html.c
* (c) 2002 Mikulas Patocka
* This file is a part of the Links program, released under GPL.
*/
#include "links.h"
struct list_head html_stack = {&html_stack, &html_stack};
int html_format_changed = 0;
static inline int isA(unsigned char c)
{
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
}
static inline int atchr(unsigned char c)
{
return /*isA(c) ||*/ (c > ' ' && c != '=' && c != '<' && c != '>');
}
/* accepts one html element */
/* e is pointer to the begining of the element (*e must be '<') */
/* eof is pointer to the end of scanned area */
/* parsed element name is stored in name, it's length is namelen */
/* first attribute is stored in attr */
/* end points to first character behind the html element */
/* returns: -1 fail (returned values in pointers are invalid) */
/* 0 success */
int parse_element(unsigned char *e, unsigned char *eof, unsigned char **name, int *namelen, unsigned char **attr, unsigned char **end)
{
if (eof - e < 3 || *(e++) != '<') return -1;
if (name) *name = e;
if (*e == '/') {
e++;
if (*e == '>' || *e == '<') goto xx;
} else if (!isA(*e)) {
return -1;
}
while (isA(*e) || (*e >= '0' && *e <= '9') || *e == '_' || *e == '-' || *e == '=') {
e++;
if (e >= eof) return -1;
}
xx:
if (name && namelen) *namelen = (int)(e - *name);
while ((WHITECHAR(*e) || *e == '/' || *e == ':')) {
e++;
if (e >= eof) return -1;
}
if ((!atchr(*e) && *e != '>' && *e != '<')) return -1;
if (attr) *attr = e;
nextattr:
while (WHITECHAR(*e)) {
e++;
if (e >= eof) return -1;
}
if ((!atchr(*e) && *e != '>' && *e != '<')) return -1;
if (*e == '>' || *e == '<') goto en;
while (atchr(*e)) {
e++;
if (e >= eof) return -1;
}
while (WHITECHAR(*e)) {
e++;
if (e >= eof) return -1;
}
if (*e != '=') goto endattr;
if (1) goto x2;
while (WHITECHAR(*e)) {
x2:
e++;
if (e >= eof) return -1;
}
if (U(*e)) {
unsigned char uu = *e;
/*u:*/
if (1) goto x3;
while (e < eof && *e != uu && *e /*(WHITECHAR(*e) || *e > ' ')*/) {
x3:
e++;
if (e >= eof) return -1;
}
if (*e < ' ') return -1;
e++;
if (e >= eof /*|| (!WHITECHAR(*e) && *e != uu && *e != '>' && *e != '<')*/) return -1;
/*if (*e == uu) goto u;*/
} else {
while (!WHITECHAR(*e) && *e != '>' && *e != '<') {
e++;
if (e >= eof) return -1;
}
}
while (WHITECHAR(*e)) {
e++;
if (e >= eof) return -1;
}
endattr:
if (*e != '>' && *e != '<') goto nextattr;
en:
if (e[-1] == '\\') return -1;
if (end) *end = e + (*e == '>');
return 0;
}
#define add_chr(s, l, c) \
do { \
if (!((l) & (32 - 1))) { \
if ((unsigned)(l) > MAXINT - 32) overalloc(); \
(s) = mem_realloc((s), (l) + 32); \
} \
(s)[(l)++] = (c); \
} while (0)
int get_attr_val_nl = 0;
/* parses html element attributes */
/* e is attr pointer previously got from parse_element, DON'T PASS HERE ANY OTHER VALUE!!! */
/* name is searched attribute */
/* returns allocated string containing the attribute, or NULL on unsuccess */
unsigned char *get_attr_val(unsigned char *e, unsigned char *name)
{
unsigned char *n;
unsigned char *a = DUMMY;
int l = 0;
int f;
aa:
while (WHITECHAR(*e)) e++;
if (*e == '>' || *e == '<') return NULL;
n = name;
while (*n && upcase(*e) == upcase(*n)) e++, n++;
f = *n;
while (atchr(*e)) f = 1, e++;
while (WHITECHAR(*e)) e++;
if (*e != '=') goto ea;
e++;
while (WHITECHAR(*e)) e++;
if (!U(*e)) {
while (!WHITECHAR(*e) && *e != '>' && *e != '<') {
if (!f) add_chr(a, l, *e);
e++;
}
} else {
unsigned char uu = *e;
/*a:*/
e++;
while (*e != uu) {
if (!*e) {
mem_free(a);
return NULL;
}
if (!f) {
if (get_attr_val_nl == 2) goto exact;
if (*e != 13) {
if (*e != 9 && *e != 10) exact:add_chr(a, l, *e);
else if (!get_attr_val_nl) add_chr(a, l, ' ');
}
}
e++;
}
e++;
/*if (*e == uu) {
if (!f) add_chr(a, l, *e);
goto a;
}*/
}
ea:
if (!f) {
unsigned char *b;
add_chr(a, l, 0);
if (strchr(cast_const_char a, '&')) {
unsigned char *aa = a;
int c = d_opt->cp;
d_opt->cp = d_opt->real_cp;
a = convert_string(NULL, aa, (int)strlen(cast_const_char aa), d_opt);
d_opt->cp = c;
mem_free(aa);
}
while ((b = cast_uchar strchr(cast_const_char a, 1))) *b = ' ';
if (get_attr_val_nl != 2) {
for (b = a; *b == ' '; b++)
;
if (b != a) memmove(a, b, strlen(cast_const_char b) + 1);
for (b = a + strlen(cast_const_char a) - 1; b >= a && *b == ' '; b--) *b = 0;
}
set_mem_comment(a, name, (int)strlen(cast_const_char name));
return a;
}
goto aa;
}
int has_attr(unsigned char *e, unsigned char *name)
{
unsigned char *a;
if (!(a = get_attr_val(e, name))) return 0;
mem_free(a);
return 1;
}
/*
static unsigned char *get_url_val(unsigned char *e, unsigned char *name)
{
int n = 0;
unsigned char *p, *q, *pp;
if (!(pp = get_attr_val(e, name))) return NULL;
p = pp; q = pp;
while (1) {
if (*p == '#') n = 1;
if ((*p = *q) != ' ' || n) p++;
if (!*q) break;
q++;
}
return pp;
}
*/
static unsigned char *get_url_val(unsigned char *e, unsigned char *name)
{
unsigned char *a;
get_attr_val_nl = 1;
a = get_attr_val(e, name);
get_attr_val_nl = 0;
return a;
}
static unsigned char *get_exact_attr_val(unsigned char *e, unsigned char *name)
{
unsigned char *a;
get_attr_val_nl = 2;
a = get_attr_val(e, name);
get_attr_val_nl = 0;
if (a) {
unsigned char *x1, *x2;
for (x1 = x2 = a; *x1; x1++, x2++) {
if (x1[0] == '\r') {
*x2 = '\n';
if (x1[1] == '\n') x1++;
} else {
*x2 = *x1;
}
}
*x2 = 0;
}
return a;
}
static struct {
unsigned short int n;
char *s;
} roman_tbl[] = {
{1000, "m"},
{999, "im"},
/* {995, "vm"},*/
{990, "xm"},
/* {950, "lm"},*/
{900, "cm"},
{500, "d"},
{499, "id"},
/* {495, "vd"},*/
{490, "xd"},
/* {450, "ld"},*/
{400, "cd"},
{100, "c"},
{99, "ic"},
/* {95, "vc"},*/
{90, "xc"},
{50, "l"},
{49, "il"},
/* {45, "vl"},*/
{40, "xl"},
{10, "x"},
{9, "ix"},
{5, "v"},
{4, "iv"},
{1, "i"},
{0, NULL}
};
static void roman(unsigned char *p, unsigned n)
{
int i = 0;
if (n >= 4000) {
strcpy(cast_char p, "---");
return;
}
if (!n) {
strcpy(cast_char p, "o");
return;
}
p[0] = 0;
while (n) {
while (roman_tbl[i].n <= n) {
n -= roman_tbl[i].n;
strcat(cast_char p, cast_const_char roman_tbl[i].s);
}
i++;
if (n && !roman_tbl[i].n) {
internal("BUG in roman number convertor");
return;
}
}
}
struct color_spec {
char *name;
int rgb;
};
static struct color_spec color_specs[] = {
{"aliceblue", 0xF0F8FF},
{"antiquewhite", 0xFAEBD7},
{"aqua", 0x00FFFF},
{"aquamarine", 0x7FFFD4},
{"azure", 0xF0FFFF},
{"beige", 0xF5F5DC},
{"bisque", 0xFFE4C4},
{"black", 0x000000},
{"blanchedalmond", 0xFFEBCD},
{"blue", 0x0000FF},
{"blueviolet", 0x8A2BE2},
{"brown", 0xA52A2A},
{"burlywood", 0xDEB887},
{"cadetblue", 0x5F9EA0},
{"chartreuse", 0x7FFF00},
{"chocolate", 0xD2691E},
{"coral", 0xFF7F50},
{"cornflowerblue", 0x6495ED},
{"cornsilk", 0xFFF8DC},
{"crimson", 0xDC143C},
{"cyan", 0x00FFFF},
{"darkblue", 0x00008B},
{"darkcyan", 0x008B8B},
{"darkgoldenrod", 0xB8860B},
{"darkgray", 0xA9A9A9},
{"darkgreen", 0x006400},
{"darkkhaki", 0xBDB76B},
{"darkmagenta", 0x8B008B},
{"darkolivegreen", 0x556B2F},
{"darkorange", 0xFF8C00},
{"darkorchid", 0x9932CC},
{"darkred", 0x8B0000},
{"darksalmon", 0xE9967A},
{"darkseagreen", 0x8FBC8F},
{"darkslateblue", 0x483D8B},
{"darkslategray", 0x2F4F4F},
{"darkturquoise", 0x00CED1},
{"darkviolet", 0x9400D3},
{"deeppink", 0xFF1493},
{"deepskyblue", 0x00BFFF},
{"dimgray", 0x696969},
{"dodgerblue", 0x1E90FF},
{"firebrick", 0xB22222},
{"floralwhite", 0xFFFAF0},
{"forestgreen", 0x228B22},
{"fuchsia", 0xFF00FF},
{"gainsboro", 0xDCDCDC},
{"ghostwhite", 0xF8F8FF},
{"gold", 0xFFD700},
{"goldenrod", 0xDAA520},
{"gray", 0x808080},
{"green", 0x008000},
{"greenyellow", 0xADFF2F},
{"honeydew", 0xF0FFF0},
{"hotpink", 0xFF69B4},
{"indianred", 0xCD5C5C},
{"indigo", 0x4B0082},
{"ivory", 0xFFFFF0},
{"khaki", 0xF0E68C},
{"lavender", 0xE6E6FA},
{"lavenderblush", 0xFFF0F5},
{"lawngreen", 0x7CFC00},
{"lemonchiffon", 0xFFFACD},
{"lightblue", 0xADD8E6},
{"lightcoral", 0xF08080},
{"lightcyan", 0xE0FFFF},
{"lightgoldenrodyellow", 0xFAFAD2},
{"lightgreen", 0x90EE90},
{"lightgrey", 0xD3D3D3},
{"lightpink", 0xFFB6C1},
{"lightsalmon", 0xFFA07A},
{"lightseagreen", 0x20B2AA},
{"lightskyblue", 0x87CEFA},
{"lightslategray", 0x778899},
{"lightsteelblue", 0xB0C4DE},
{"lightyellow", 0xFFFFE0},
{"lime", 0x00FF00},
{"limegreen", 0x32CD32},
{"linen", 0xFAF0E6},
{"magenta", 0xFF00FF},
{"maroon", 0x800000},
{"mediumaquamarine", 0x66CDAA},
{"mediumblue", 0x0000CD},
{"mediumorchid", 0xBA55D3},
{"mediumpurple", 0x9370DB},
{"mediumseagreen", 0x3CB371},
{"mediumslateblue", 0x7B68EE},
{"mediumspringgreen", 0x00FA9A},
{"mediumturquoise", 0x48D1CC},
{"mediumvioletred", 0xC71585},
{"midnightblue", 0x191970},
{"mintcream", 0xF5FFFA},
{"mistyrose", 0xFFE4E1},
{"moccasin", 0xFFE4B5},
{"navajowhite", 0xFFDEAD},
{"navy", 0x000080},
{"oldlace", 0xFDF5E6},
{"olive", 0x808000},
{"olivedrab", 0x6B8E23},
{"orange", 0xFFA500},
{"orangered", 0xFF4500},
{"orchid", 0xDA70D6},
{"palegoldenrod", 0xEEE8AA},
{"palegreen", 0x98FB98},
{"paleturquoise", 0xAFEEEE},
{"palevioletred", 0xDB7093},
{"papayawhip", 0xFFEFD5},
{"peachpuff", 0xFFDAB9},
{"peru", 0xCD853F},
{"pink", 0xFFC0CB},
{"plum", 0xDDA0DD},
{"powderblue", 0xB0E0E6},
{"purple", 0x800080},
{"red", 0xFF0000},
{"rosybrown", 0xBC8F8F},
{"royalblue", 0x4169E1},
{"saddlebrown", 0x8B4513},
{"salmon", 0xFA8072},
{"sandybrown", 0xF4A460},
{"seagreen", 0x2E8B57},
{"seashell", 0xFFF5EE},
{"sienna", 0xA0522D},
{"silver", 0xC0C0C0},
{"skyblue", 0x87CEEB},
{"slateblue", 0x6A5ACD},
{"slategray", 0x708090},
{"snow", 0xFFFAFA},
{"springgreen", 0x00FF7F},
{"steelblue", 0x4682B4},
{"tan", 0xD2B48C},
{"teal", 0x008080},
{"thistle", 0xD8BFD8},
{"tomato", 0xFF6347},
{"turquoise", 0x40E0D0},
{"violet", 0xEE82EE},
{"wheat", 0xF5DEB3},
{"white", 0xFFFFFF},
{"whitesmoke", 0xF5F5F5},
{"yellow", 0xFFFF00},
{"yellowgreen", 0x9ACD32},
};
#define endof(T) ((T)+sizeof(T)/sizeof(*(T)))
int decode_color(unsigned char *str, struct rgb *col)
{
unsigned long ch;
unsigned char *end;
if (*str != '#') {
struct color_spec *cs;
for (cs = color_specs; cs < endof(color_specs); cs++)
if (!strcasecmp(cast_const_char cs->name, cast_const_char str)) {
ch = cs->rgb;
goto found;
}
} else {
str++;
}
if (strlen(cast_const_char str) == 6) {
ch = strtoul(cast_const_char str, (char **)(void *)&end, 16);
if (!*end && ch < 0x1000000) {
found:
memset(col, 0, sizeof(struct rgb));
col->r = (unsigned)ch / 0x10000;
col->g = (unsigned)ch / 0x100 % 0x100;
col->b = (unsigned)ch % 0x100;
return 0;
}
}
if (strlen(cast_const_char str) == 3) {
ch = strtoul(cast_const_char str, (char **)(void *)&end, 16);
if (!*end && ch < 0x1000) {
memset(col, 0, sizeof(struct rgb));
col->r = ((unsigned)ch / 0x100) * 0x11;
col->g = ((unsigned)ch / 0x10 % 0x10) * 0x11;
col->b = ((unsigned)ch % 0x10) * 0x11;
return 0;
}
}
return -1;
}
int get_color(unsigned char *a, unsigned char *c, struct rgb *rgb)
{
unsigned char *at;
int r = -1;
if (d_opt->col >= 1) if ((at = get_attr_val(a, c))) {
r = decode_color(at, rgb);
mem_free(at);
}
return r;
}
int get_bgcolor(unsigned char *a, struct rgb *rgb)
{
if (d_opt->col < 2) return -1;
return get_color(a, cast_uchar "bgcolor", rgb);
}
static unsigned char *get_target(unsigned char *a)
{
return get_attr_val(a, cast_uchar "target");
}
void kill_html_stack_item(struct html_element *e)
{
html_format_changed = 1;
if (e->dontkill == 2) {
internal("trying to kill unkillable element");
return;
}
if (!e || (void *)e == &html_stack) {
internal("trying to free bad html element");
return;
}
if (e->attr.fontface) mem_free(e->attr.fontface);
if (e->attr.link) mem_free(e->attr.link);
if (e->attr.target) mem_free(e->attr.target);
if (e->attr.image) mem_free(e->attr.image);
if (e->attr.href_base) mem_free(e->attr.href_base);
if (e->attr.target_base) mem_free(e->attr.target_base);
if (e->attr.select) mem_free(e->attr.select);
free_js_event_spec(e->attr.js_event);
del_from_list(e);
mem_free(e);
/*if ((void *)(html_stack.next) == &html_stack || !html_stack.next) {
debug("killing last element");
}*/
}
#if defined(DEBUG) && 0
void debug_stack(void)
{
struct html_element *e;
printf("HTML stack debug: \n");
foreachback(e, html_stack) {
int i;
printf("\"");
for (i = 0; i < e->namelen; i++) printf("%c", e->name[i]);
printf("\"\n");
}
printf("%c", 7);
fflush(stdout);
sleep(1);
}
#endif
void html_stack_dup(void)
{
struct html_element *e;
struct html_element *ep;
html_format_changed = 1;
if ((void *)(ep = html_stack.next) == &html_stack || !html_stack.next) {
internal("html stack empty");
return;
}
e = mem_alloc(sizeof(struct html_element));
memcpy(e, ep, sizeof(struct html_element));
e->attr.fontface = stracpy(ep->attr.fontface);
e->attr.link = stracpy(ep->attr.link);
e->attr.target = stracpy(ep->attr.target);
e->attr.image = stracpy(ep->attr.image);
e->attr.href_base = stracpy(ep->attr.href_base);
e->attr.target_base = stracpy(ep->attr.target_base);
e->attr.select = stracpy(ep->attr.select);
copy_js_event_spec(&e->attr.js_event, ep->attr.js_event);
/*if (e->name) {
if (e->attr.link) set_mem_comment(e->attr.link, e->name, e->namelen);
if (e->attr.target) set_mem_comment(e->attr.target, e->name, e->namelen);
if (e->attr.image) set_mem_comment(e->attr.image, e->name, e->namelen);
if (e->attr.href_base) set_mem_comment(e->attr.href_base, e->name, e->namelen);
if (e->attr.target_base) set_mem_comment(e->attr.target_base, e->name, e->namelen);
if (e->attr.select) set_mem_comment(e->attr.select, e->name, e->namelen);
}*/
e->name = e->options = NULL;
e->namelen = 0;
e->dontkill = 0;
add_to_list(html_stack, e);
}
#ifdef JS
static void get_js_event(unsigned char *a, unsigned char *name, unsigned char **where)
{
unsigned char *v;
if ((v = get_attr_val(a, name))) {
if (*where) mem_free(*where);
*where = v;
}
}
static int get_js_events_x(struct js_event_spec **spec, unsigned char *a)
{
if (!has_attr(a, cast_uchar "onkeyup") && !has_attr(a, cast_uchar "onkeydown") && !has_attr(a,cast_uchar "onkeypress") && !has_attr(a,cast_uchar "onchange") && !has_attr(a, cast_uchar "onfocus") && !has_attr(a,cast_uchar "onblur") && !has_attr(a, cast_uchar "onclick") && !has_attr(a, cast_uchar "ondblclick") && !has_attr(a, cast_uchar "onmousedown") && !has_attr(a, cast_uchar "onmousemove") && !has_attr(a, cast_uchar "onmouseout") && !has_attr(a, cast_uchar "onmouseover") && !has_attr(a, cast_uchar "onmouseup")) return 0;
create_js_event_spec(spec);
get_js_event(a, cast_uchar "onclick", &(*spec)->click_code);
get_js_event(a, cast_uchar "ondblclick", &(*spec)->dbl_code);
get_js_event(a, cast_uchar "onmousedown", &(*spec)->down_code);
get_js_event(a, cast_uchar "onmouseup", &(*spec)->up_code);
get_js_event(a, cast_uchar "onmouseover", &(*spec)->over_code);
get_js_event(a, cast_uchar "onmouseout", &(*spec)->out_code);
get_js_event(a, cast_uchar "onmousemove", &(*spec)->move_code);
get_js_event(a, cast_uchar "onfocus", &(*spec)->focus_code);
get_js_event(a, cast_uchar "onblur", &(*spec)->blur_code);
get_js_event(a, cast_uchar "onchange", &(*spec)->change_code);
get_js_event(a, cast_uchar "onkeypress", &(*spec)->keypress_code);
get_js_event(a, cast_uchar "onkeyup", &(*spec)->keyup_code);
get_js_event(a, cast_uchar "onkeydown", &(*spec)->keydown_code);
return 1;
}
static int get_js_events(unsigned char *a)
{
return get_js_events_x(&format_.js_event, a);
}
#else
static int get_js_events_x(struct js_event_spec **spec, unsigned char *a)
{
return 0;
}
static int get_js_events(unsigned char *a)
{
return 0;
}
#endif
void *ff;
void (*put_chars_f)(void *, unsigned char *, int);
void (*line_break_f)(void *);
void *(*special_f)(void *, int, ...);
static unsigned char *eoff;
unsigned char *eofff;
unsigned char *startf;
int line_breax;
static int pos;
static int putsp;
static int was_br;
int table_level;
int empty_format;
static void ln_break(int n)
{
if (!n || html_top.invisible) return;
while (n > line_breax) line_breax++, line_break_f(ff);
pos = 0;
putsp = -1;
}
#define CH_BUF 256
#define BUF_RESERVE 6
static int put_chars_conv(unsigned char *c, int l)
{
static unsigned char buffer[CH_BUF];
int bp = 0;
int pp = 0;
int total = 0;
if (format_.attr & AT_GRAPHICS) {
put_chars_f(ff, c, l);
return l;
}
if (!l) put_chars_f(ff, NULL, 0);
while (pp < l) {
int sl;
unsigned char *e = NULL; /* against warning */
if (c[pp] < 128 && c[pp] != '&') {
put_c:
if (bp > CH_BUF - BUF_RESERVE && c[pp] >= 0xc0) goto flush;
if (!(buffer[bp++] = c[pp++])) buffer[bp - 1] = ' ';
if ((buffer[bp - 1] != ' ' || par_format.align == AL_NO) && bp < CH_BUF) continue;
goto flush;
}
if (c[pp] != '&') {
struct conv_table *t;
int i;
if (pp + 3 <= l && c[pp] == 0xef && c[pp + 1] == 0xbb && c[pp + 2] == 0xbf && d_opt->real_cp == utf8_table) {
pp += 3;
continue;
}
if ((d_opt->real_cp == d_opt->cp && d_opt->real_cp == utf8_table) || !convert_table) goto put_c;
t = convert_table;
i = pp;
decode:
if (!t[c[i]].t) {
e = t[c[i]].u.str;
} else {
t = t[c[i++]].u.tbl;
if (i >= l) goto put_c;
goto decode;
}
pp = i + 1;
} else {
int i = pp + 1;
if (d_opt->plain & 1) goto put_c;
while (i < l && c[i] != ';' && c[i] != '&' && c[i] > ' ') i++;
if (!(e = get_entity_string(&c[pp + 1], i - pp - 1, d_opt->cp))) goto put_c;
pp = i + (i < l && c[i] == ';');
}
if (!e[0]) continue;
if (!e[1]) {
buffer[bp++] = e[0];
if (bp < CH_BUF) continue;
flush:
e = cast_uchar "";
goto flush1;
}
sl = (int)strlen(cast_const_char e);
if (sl > BUF_RESERVE) {
e = cast_uchar "";
sl = 0;
}
if (bp + sl > CH_BUF) {
flush1:
put_chars_f(ff, buffer, bp);
if (d_opt->cp == utf8_table) {
while (bp) if ((buffer[--bp] & 0xc0) != 0x80) total++;
} else {
total += bp;
bp = 0;
}
}
while (*e) {
buffer[bp++] = *(e++);
}
if (bp == CH_BUF) goto flush;
}
if (bp) put_chars_f(ff, buffer, bp);
if (d_opt->cp == utf8_table) {
while (bp) if ((buffer[--bp] & 0xc0) != 0x80) total++;
} else {
total += bp;
}
return total;
}
static void put_chrs(unsigned char *start, int len)
{
if (par_format.align == AL_NO) putsp = 0;
if (!len || html_top.invisible) return;
if (putsp == 1) pos += put_chars_conv(cast_uchar " ", 1), putsp = -1;
if (putsp == -1) {
if (start[0] == ' ') start++, len--;
putsp = 0;
}
if (!len) {
putsp = -1;
if (par_format.align == AL_NO) putsp = 0;
return;
}
if (start[len - 1] == ' ') putsp = -1;
if (par_format.align == AL_NO) putsp = 0;
was_br = 0;
pos += put_chars_conv(start, len);
line_breax = 0;
}
static void kill_until(int ls, ...)
{
int l;
struct html_element *e = &html_top;
if (ls) e = e->next;
while ((void *)e != &html_stack) {
int sk = 0;
va_list arg;
va_start(arg, ls);
while (1) {
unsigned char *s = va_arg(arg, unsigned char *);
if (!s) break;
if (!*s) sk++;
else if ((size_t)e->namelen == strlen(cast_const_char s) && !casecmp(e->name, s, strlen(cast_const_char s))) {
if (!sk) {
if (e->dontkill) break;
va_end(arg);
goto killll;
}
else if (sk == 1) {
va_end(arg);
goto killl;
} else break;
}
}
va_end(arg);
if (e->dontkill || (e->namelen == 5 && !casecmp(e->name, cast_uchar "TABLE", 5))) break;
if (e->namelen == 2 && upcase(e->name[0]) == 'T' && (upcase(e->name[1]) == 'D' || upcase(e->name[1]) == 'H' || upcase(e->name[1]) == 'R')) break;
e = e->next;
}
return;
killl:
e = e->prev;
killll:
l = 0;
while ((void *)e != &html_stack) {
if (ls && e == html_stack.next) break;
if (e->linebreak > l) l = e->linebreak;
e = e->prev;
kill_html_stack_item(e->next);
}
ln_break(l);
}
static inline unsigned char *top_href_base(void)
{
return ((struct html_element *)html_stack.prev)->attr.href_base;
}
int get_num(unsigned char *a, unsigned char *n)
{
unsigned char *al;
if ((al = get_attr_val(a, n))) {
unsigned char *end;
unsigned long s = strtoul(cast_const_char al, (char **)(void *)&end, 10);
if (!*al || *end || s > 10000) s = -1;
mem_free(al);
return (int)s;
}
return -1;
}
/* trunc somehow clips the maximum values. Use 0 to disable truncastion. */
static int parse_width(unsigned char *w, int trunc)
{
unsigned char *end;
int p = 0;
long s;
int l;
int limit = par_format.width - (par_format.leftmargin + par_format.rightmargin) * gf_val(1, G_HTML_MARGIN);
while (WHITECHAR(*w)) w++;
for (l = 0; w[l] && w[l] != ','; l++)
;
while (l && WHITECHAR(w[l - 1])) l--;
if (!l) return -1;
if (w[l - 1] == '%') l--, p = 1;
while (l && WHITECHAR(w[l - 1])) l--;
if (!l) return -1;
s = strtoul(cast_const_char w, (char **)(void *)&end, 10);
if (end - w < l || s < 0 || s > 10000) return -1;
if (p) {
if (trunc) {
#ifdef G
if (trunc == 3) {
return -1;
/*
limit = d_opt->yw - G_SCROLL_BAR_WIDTH;
if (limit < 0) limit = 0;
*/
}
#endif
s = s * limit / 100;
}
else return -1;
} else s = (s + (gf_val(HTML_CHAR_WIDTH, 1) - 1) / 2) / gf_val(HTML_CHAR_WIDTH, 1);
if (trunc == 1 && s > limit) s = limit;
if (s < 0) s = 0;
return (int)s;
}
/* trunc somehow clips the maximum values. Use 0 to disable truncastion. */
int get_width(unsigned char *a, unsigned char *n, int trunc)
{
int r;
unsigned char *w;
if (!(w = get_attr_val(a, n))) return -1;
r = parse_width(w, trunc);
mem_free(w);
return r;
}
struct form form = { NULL, NULL, NULL, NULL, 0, 0 };
unsigned char *last_form_tag;
unsigned char *last_form_attr;
unsigned char *last_input_tag;
static inline void set_link_attr(void)
{
memcpy(!(format_.attr & AT_INVERT) ? &format_.fg : &format_.bg, &format_.clink, sizeof(struct rgb));
}
static void put_link_line(unsigned char *prefix, unsigned char *linkname, unsigned char *link, unsigned char *target)
{
html_stack_dup();
ln_break(1);
if (format_.link) mem_free(format_.link), format_.link = NULL;
if (format_.target) mem_free(format_.target), format_.target = NULL;
format_.form = NULL;
put_chrs(prefix, (int)strlen(cast_const_char prefix));
html_format_changed = 1;
format_.link = join_urls(format_.href_base, link);
format_.target = stracpy(target);
set_link_attr();
put_chrs(linkname, (int)strlen(cast_const_char linkname));
ln_break(1);
kill_html_stack_item(&html_top);
}
static void html_span(unsigned char *a) { }
static void html_bold(unsigned char *a)
{
get_js_events(a);
format_.attr |= AT_BOLD;
}
static void html_italic(unsigned char *a)
{
get_js_events(a);
format_.attr |= AT_ITALIC;
}
static void html_underline(unsigned char *a)
{
get_js_events(a);
format_.attr |= AT_UNDERLINE;
}
static void html_fixed(unsigned char *a)
{
get_js_events(a);
format_.attr |= AT_FIXED;
}
static void html_invert(unsigned char *a)
{
struct rgb rgb;
get_js_events(a);
memcpy(&rgb, &format_.fg, sizeof(struct rgb));
memcpy(&format_.fg, &format_.bg, sizeof(struct rgb));
memcpy(&format_.bg, &rgb, sizeof(struct rgb));
format_.attr ^= AT_INVERT;
}
static void html_a(unsigned char *a)
{
unsigned char *al;
int ev = get_js_events(a);
if ((al = get_url_val(a, cast_uchar "href"))) {
unsigned char *all = al;
while (all[0] == ' ') all++;
while (all[0] && all[strlen(cast_const_char all) - 1] == ' ') all[strlen(cast_const_char all) - 1] = 0;
if (format_.link) mem_free(format_.link);
format_.link = join_urls(format_.href_base, all);
mem_free(al);
if ((al = get_target(a))) {
if (format_.target) mem_free(format_.target);
format_.target = al;
} else {
if (format_.target) mem_free(format_.target);
format_.target = stracpy(format_.target_base);
}
/*format_.attr ^= AT_BOLD;*/
set_link_attr();
} else if (!ev) kill_html_stack_item(&html_top);
if ((al = get_attr_val(a, cast_uchar "name"))) {
special_f(ff, SP_TAG, al);
mem_free(al);
}
}
static void html_a_special(unsigned char *a, unsigned char *next, unsigned char *eof)
{
unsigned char *t;
while (next < eof && WHITECHAR(*next)) next++;
if (next > eof - 4) return;
if (!(next[0] == '<' && next[1] == '/' && upcase(next[2]) == 'A' && next[3] == '>')) return;
if (!has_attr(a, cast_uchar "href") || !format_.link) return;
t = get_attr_val(a, cast_uchar "title");
if (!t) return;
put_chrs(t, (int)strlen(cast_const_char t));
mem_free(t);
}
static void html_sub(unsigned char *a)
{
get_js_events(a);
format_.fontsize = 1;
format_.baseline = -1;
}
static void html_sup(unsigned char *a)
{
get_js_events(a);
format_.fontsize = 1;
if (format_.baseline <= 0) format_.baseline = format_.fontsize;
}
static void html_font(unsigned char *a)