html.c

this is the file used to browse web

		menu_stack[menu_stack_size++] = nmenu;
	}
	if (!name) menu_stack_size--;
}

void init_menu()
{
	menu_stack_size = 0;
	menu_stack = DUMMY;
	new_menu_item(stracpy(""), -1, 0);
}

void free_menu(struct menu_item *m) /* Grrr. Recursion */
{
	struct menu_item *mm;
	for (mm = m; mm->text; mm++) {
		mem_free(mm->text);
		if (mm->func == MENU_FUNC do_select_submenu) free_menu(mm->data);
	}
	mem_free(m);
}

struct menu_item *detach_menu()
{
	struct menu_item *i = NULL;
	if (menu_stack_size) i = menu_stack[0];
	if (menu_stack) mem_free(menu_stack);
	return i;
}

void destroy_menu()
{
	if (menu_stack && menu_stack != DUMMY) free_menu(menu_stack[0]);
	detach_menu();
}

void menu_labels(struct menu_item *m, unsigned char *base, unsigned char **lbls)
{
	unsigned char *bs;
	for (; m->text; m++) {
		if (m->func == MENU_FUNC do_select_submenu) {
			if ((bs = stracpy(base))) {
				add_to_strn(&bs, m->text);
				add_to_strn(&bs, " ");
				menu_labels(m->data, bs, lbls);
				mem_free(bs);
			}
		} else {
			if ((bs = stracpy(m->hotkey[1] ? (unsigned char *)"" : base))) add_to_strn(&bs, m->text);
			lbls[(int)m->data] = bs;
		}
	}
}

int menu_contains(struct menu_item *m, int f)
{
	if (m->func != MENU_FUNC do_select_submenu) return (int)m->data == f;
	for (m = m->data; m->text; m++) if (menu_contains(m, f)) return 1;
	return 0;
}

void do_select_submenu(struct terminal *term, struct menu_item *menu, struct session *ses)
{
	struct menu_item *m;
	int def = get_current_state(ses);
	int sel = 0;
	if (def < 0) def = 0;
	for (m = menu; m->text; m++, sel++) if (menu_contains(m, def)) goto f;
	sel = 0;
	f:
	do_menu_selected(term, menu, ses, sel);
}

int do_html_select(unsigned char *attr, unsigned char *html, unsigned char *eof, unsigned char **end, void *f)
{
	struct form_control *fc;
	unsigned char *t_name, *t_attr, *en;
	int t_namelen;
	unsigned char *lbl;
	int lbl_l;
	unsigned char *vlbl;
	int vlbl_l;
	int nnmi = 0;
	struct conv_table *ct = special_f(f, SP_TABLE, NULL);
	unsigned char **val, **lbls;
	int order, preselect, group;
	int i, mw;
	if (has_attr(attr, "multiple")) return 1;
	find_form_for_input(attr);
	lbl = NULL;
	lbl_l = 0;
	vlbl = NULL;
	vlbl_l = 0;
	val = DUMMY;
	order = 0, group = 0, preselect = -1;
	init_menu();
        se:
        en = html;
        see:
        html = en;
	while (html < eof && *html != '<') html++;
	if (html >= eof) {
		int i;
		abort:
		*end = html;
		if (lbl) mem_free(lbl);
		if (vlbl) mem_free(vlbl);
		for (i = 0; i < order; i++) if (val[i]) mem_free(val[i]);
		mem_free(val);
		destroy_menu();
		*end = en;
		return 0;
	}
	if (lbl) {
		unsigned char *q, *s = en;
		int l = html - en;
		while (l && WHITECHAR(s[0])) s++, l--;
		while (l && WHITECHAR(s[l-1])) l--;
		q = convert_string(ct, s, l);
		if (q) add_to_str(&lbl, &lbl_l, q), mem_free(q);
		add_bytes_to_str(&vlbl, &vlbl_l, s, l);
	}
	if (html + 2 <= eof && (html[1] == '!' || html[1] == '?')) {
		html = skip_comment(html, eof);
		goto se;
	}
	if (parse_element(html, eof, &t_name, &t_namelen, &t_attr, &en)) {
		html++;
		goto se;
	}
	if (t_namelen == 7 && !casecmp(t_name, "/SELECT", 7)) {
		if (lbl) {
			if (!val[order - 1]) val[order - 1] = stracpy(vlbl);
			if (!nnmi) new_menu_item(lbl, order - 1, 1), lbl = NULL;
			else mem_free(lbl), lbl = NULL;
			mem_free(vlbl), vlbl = NULL;
		}
		goto end_parse;
	}
	if (t_namelen == 7 && !casecmp(t_name, "/OPTION", 7)) {
		if (lbl) {
			if (!val[order - 1]) val[order - 1] = stracpy(vlbl);
			if (!nnmi) new_menu_item(lbl, order - 1, 1), lbl = NULL;
			else mem_free(lbl), lbl = NULL;
			mem_free(vlbl), vlbl = NULL;
		}
		goto see;
	}
	if (t_namelen == 6 && !casecmp(t_name, "OPTION", 6)) {
		unsigned char *v, *vx;
		if (lbl) {
			if (!val[order - 1]) val[order - 1] = stracpy(vlbl);
			if (!nnmi) new_menu_item(lbl, order - 1, 1), lbl = NULL;
			else mem_free(lbl), lbl = NULL;
			mem_free(vlbl), vlbl = NULL;
		}
		if (has_attr(t_attr, "disabled")) goto see;
		if (preselect == -1 && has_attr(t_attr, "selected")) preselect = order;
		v = get_exact_attr_val(t_attr, "value");
		if (!(order & (ALLOC_GR - 1))) {
			if ((unsigned)order > MAXINT / sizeof(unsigned char *) - ALLOC_GR) overalloc();
			if ((unsigned)order > MAXINT / sizeof(char *) - ALLOC_GR) overalloc();
			val = mem_realloc(val, (order + ALLOC_GR) * sizeof(unsigned char *));
		}
		val[order++] = v;
		if ((vx = get_attr_val(t_attr, "label"))) {
			new_menu_item(convert_string(ct, vx, strlen(vx)), order - 1, 0);
			mem_free(vx);
		}
		if (!v || !vx) {
			lbl = init_str(), lbl_l = 0;
			vlbl = init_str(), vlbl_l = 0;
			nnmi = !!vx;
		}
		goto see;
	}
	if ((t_namelen == 8 && !casecmp(t_name, "OPTGROUP", 8)) || (t_namelen == 9 && !casecmp(t_name, "/OPTGROUP", 9))) {
		if (lbl) {
			if (!val[order - 1]) val[order - 1] = stracpy(vlbl);
			if (!nnmi) new_menu_item(lbl, order - 1, 1), lbl = NULL;
			else mem_free(lbl), lbl = NULL;
			mem_free(vlbl), vlbl = NULL;
		}
		if (group) new_menu_item(NULL, -1, 0), group = 0;
	}
	if (t_namelen == 8 && !casecmp(t_name, "OPTGROUP", 8)) {
		char *la;
		if (!(la = get_attr_val(t_attr, "label"))) la = stracpy("");
		new_menu_item(convert_string(ct, la, strlen(la)), -1, 0);
		mem_free(la);
		group = 1;
	}
	goto see;

	end_parse:
	*end = en;
	if (!order) goto abort;
	fc = mem_alloc(sizeof(struct form_control));
	memset(fc, 0, sizeof(struct form_control));
	lbls = mem_alloc(order * sizeof(char *));
	memset(lbls, 0, order * sizeof(char *));
	fc->form_num = last_form_tag - startf;
	fc->ctrl_num = attr - last_form_tag;
	fc->position = attr - startf;
	fc->method = form.method;
	fc->action = stracpy(form.action);
	fc->name = get_attr_val(attr, "name");
	fc->type = FC_SELECT;
	fc->default_state = preselect < 0 ? 0 : preselect;
	fc->default_value = order ? stracpy(val[fc->default_state]) : stracpy("");
	fc->ro = has_attr(attr, "disabled") ? 2 : has_attr(attr, "readonly") ? 1 : 0;
	fc->nvalues = order;
	fc->values = val;
	fc->menu = detach_menu();
	fc->labels = lbls;
	menu_labels(fc->menu, "", lbls);
	put_chrs("[", 1, put_chars_f, f);
	html_stack_dup();
	format.form = fc;
	format.attr |= AT_BOLD;
	mw = 0;
	for (i = 0; i < order; i++) if (lbls[i] && strlen(lbls[i]) > (size_t)mw) mw = strlen(lbls[i]);
	for (i = 0; i < mw; i++) put_chrs("_", 1, put_chars_f, f);
	kill_html_stack_item(&html_top);
	put_chrs("]", 1, put_chars_f, f);
	special_f(ff, SP_CONTROL, fc);
	return 0;
}

void html_textarea(unsigned char *a)
{
	internal("This should be never called");
}

void do_html_textarea(unsigned char *attr, unsigned char *html, unsigned char *eof, unsigned char **end, void *f)
{
	struct form_control *fc;
	unsigned char *p, *t_name, *w;
	int t_namelen;
	int cols, rows;
	int i;
	find_form_for_input(attr);
	while (html < eof && (*html == '\n' || *html == '\r')) html++;
	p = html;
	while (p < eof && *p != '<') {
		pp:
		p++;
	}
	if (p >= eof) {
		*end = eof;
		return;
	}
	if (parse_element(p, eof, &t_name, &t_namelen, NULL, end)) goto pp;
	if (t_namelen != 9 || casecmp(t_name, "/TEXTAREA", 9)) goto pp;
	fc = mem_alloc(sizeof(struct form_control));
	memset(fc, 0, sizeof(struct form_control));
	fc->form_num = last_form_tag - startf;
	fc->ctrl_num = attr - last_form_tag;
	fc->position = attr - startf;
	fc->method = form.method;
	fc->action = stracpy(form.action);
	fc->name = get_attr_val(attr, "name");
	fc->type = FC_TEXTAREA;;
	fc->ro = has_attr(attr, "disabled") ? 2 : has_attr(attr, "readonly") ? 1 : 0;
	fc->default_value = memacpy(html, p - html);
	if ((cols = get_num(attr, "cols")) <= 0) cols = HTML_DEFAULT_TEXTAREA_WIDTH;
	cols++;
	if ((rows = get_num(attr, "rows")) <= 0) rows = HTML_DEFAULT_TEXTAREA_HEIGHT;
	if (cols > d_opt->xw) cols = d_opt->xw;
	if (rows > d_opt->yw) rows = d_opt->yw;
	fc->cols = cols;
	fc->rows = rows;
	fc->wrap = 1;
	if ((w = get_attr_val(attr, "wrap"))) {
		if (!strcasecmp(w, "hard") || !strcasecmp(w, "physical")) fc->wrap = 2;
		else if (!strcasecmp(w, "off")) fc->wrap = 0;
		mem_free(w);
	}
	if ((fc->maxlength = get_num(attr, "maxlength")) == -1) fc->maxlength = MAXINT / 4;
	if (rows > 1) ln_break(1, line_break_f, f);
	else put_chrs(" ", 1, put_chars_f, f);
	html_stack_dup();
	format.form = fc;
	format.attr |= AT_BOLD;
	for (i = 0; i < rows; i++) {
		int j;
		for (j = 0; j < cols; j++) put_chrs("_", 1, put_chars_f, f);
		if (i < rows - 1) ln_break(1, line_break_f, f);
	}
	kill_html_stack_item(&html_top);
	if (rows > 1) ln_break(1, line_break_f, f);
	else put_chrs(" ", 1, put_chars_f, f);
	special_f(f, SP_CONTROL, fc);
}

void html_iframe(unsigned char *a)
{
	unsigned char *name, *url;
	if (!(url = get_url_val(a, "src"))) return;
	if (!(name = get_attr_val(a, "name"))) name = stracpy("");
	if (*name) put_link_line("IFrame: ", name, url, d_opt->framename);
	else put_link_line("", "IFrame", url, d_opt->framename);
	mem_free(name);
	mem_free(url);
}

void html_noframes(unsigned char *a)
{
	if (d_opt->frames) html_skip(a);
}

void html_frame(unsigned char *a)
{
	unsigned char *name, *u2, *url;
	if (!(u2 = get_url_val(a, "src"))) {
		url = stracpy("");
	} else {
		url = join_urls(format.href_base, u2);
		mem_free(u2);
	}
	if (!url) return;
	name = get_attr_val (a, "name");
	if (!name)
		name = stracpy(url);
	else if (!name[0]) { /* When name doesn't have a value */
		mem_free(name);
		name = stracpy(url);
	}
	if (!d_opt->frames || !html_top.frameset) put_link_line("Frame: ", name, url, "");
	else {
		struct frame_param fp;
		fp.name = name;
		fp.url = url;
		fp.parent = html_top.frameset;
		if (special_f(ff, SP_USED, NULL)) special_f(ff, SP_FRAME, &fp);
	}
	mem_free(name);
	mem_free(url);
}

void parse_frame_widths(unsigned char *a, int ww, int www, int **op, int *olp)
{
	unsigned char *aa;
	int q, qq, i, d, nn;
	unsigned long n;
	int *oo, *o;
	int ol;
	ol = 0;
	o = DUMMY;
	new_ch:
	while (WHITECHAR(*a)) a++;
	n = strtoul(a, (char **)(void *)&a, 10);
	if (n > 10000) n = 10000;
	q = n;
	if (*a == '%') q = q * ww / 100;
	else if (*a != '*') q = (q + (www - 1) / 2) / (www ? www : 1);
	else if (!(q = -q)) q = -1;
	if ((unsigned)ol > MAXINT / sizeof(int) - 1) overalloc();
	o = mem_realloc(o, (ol + 1) * sizeof(int));
	o[ol++] = q;
	if ((aa = strchr(a, ','))) {
		a = aa + 1;
		goto new_ch;
	}
	*op = o;
	*olp = ol;
	q = 2 * ol - 1;
	for (i = 0; i < ol; i++) if (o[i] > 0) q += o[i] - 1;
	if (q >= ww) {
		distribute:
		for (i = 0; i < ol; i++) if (o[i] < 1) o[i] = 1;
		q -= ww;
		d = 0;
		for (i = 0; i < ol; i++) d += o[i];
		qq = q;
		for (i = 0; i < ol; i++) {
			q -= o[i] - o[i] * (d - qq) / (d ? d : 1);
			do_not_optimize_here(&d);
				/* SIGH! gcc 2.7.2.* has an optimizer bug! */
			o[i] = o[i] * (d - qq) / (d ? d : 1);
		}
		while (q) {
			nn = 0;
			for (i = 0; i < ol; i++) {
				if (q < 0) o[i]++, q++, nn = 1;
				if (q > 0 && o[i] > 1) o[i]--, q--, nn = 1;
				if (!q) break;
			}
			if (!nn) break;
		}
	} else {
		int nn = 0;
		for (i = 0; i < ol; i++) if (o[i] < 0) nn = 1;
		if (!nn) goto distribute;
		if ((unsigned)ol > MAXINT / sizeof(int)) overalloc();
		oo = mem_alloc(ol * sizeof(int));
		memcpy(oo, o, ol * sizeof(int));
		for (i = 0; i < ol; i++) if (o[i] < 1) o[i] = 1;
		q = ww - q;
		d = 0;
		for (i = 0; i < ol; i++) if (oo[i] < 0) d += -oo[i];
		qq = q;
		for (i = 0; i < ol; i++) if (oo[i] < 0) {
			o[i] += (-oo[i] * qq / (d ? d : 1));
			q -= (-oo[i] * qq / (d ? d : 1));
		}
		if (q < 0) {
			q = 0;
			/*internal("parse_frame_widths: q < 0"); may happen when page contains too big values */
		}
		for (i = 0; i < ol; i++) if (oo[i] < 0) {
			if (q) o[i]++, q--;
		}
		if (q > 0) {
			q = 0;
			/*internal("parse_frame_widths: q > 0"); may happen when page contains too big values */
		}
		mem_free(oo);
	}
	for (i = 0; i < ol; i++) if (!o[i]) {
		int j;
		int m = 0;
		int mj = 0;
		for (j = 0; j < ol; j++) if (o[j] > m) m = o[j], mj = j;
		if (m) o[i] = 1, o[mj]--;
	}
}

void html_frameset(unsigned char *a)
{
	int x, y;
	struct frameset_param fp;
	unsigned char *c, *d;
	if (!d_opt->frames || !special_f(ff, SP_USED, NULL)) return;
	if (!(c = get_attr_val(a, "cols"))) c = stracpy("100%");
	if (!(d = get_attr_val(a, "rows"))) d = stracpy("100%");
	if (!html_top.frameset) {
		x = d_opt->xw;
		y = d_opt->yw;
	} else {
		struct frameset_desc *f = html_top.frameset;
		if (f->yp >= f->y) goto free_cd;
		x = f->f[f->xp + f->yp * f->x].xw;
		y = f->f[f->xp + f->yp * f->x].yw;
	}
	parse_frame_widths(c, x, HTML_FRAME_CHAR_WIDTH, &fp.xw, &fp.x);
	parse_frame_widths(d, y, HTML_FRAME_CHAR_HEIGHT, &fp.yw, &fp.y);
	fp.parent = html_top.frameset;
	if (fp.x && fp.y) html_top.frameset = special_f(ff, SP_FRAMESET, &fp);
	mem_free(fp.xw);
	mem_free(fp.yw);
	free_cd:
	mem_free(c);
	mem_free(d);
}

/*void html_frameset(unsigned char *a)
{
	int w;
	int horiz = 0;
	struct frameset_param *fp;
	unsigned char *c, *d;
	if (!d_opt->frames || !special_f(ff, SP_USED, NULL)) return;
	if (!(c = get_attr_val(a, "cols"))) {
		horiz = 1;
		if (!(c = get_attr_val(a, "rows"))) return;
	}
	fp = mem_alloc(sizeof(struct frameset_param));
	fp->n = 0;
	fp->horiz = horiz;
	par_format.leftmargin = par_format.rightmargin = 0;
	d = c;
	while (1) {
		while (WHITECHAR(*d)) d++;
		if (!*d) break;
		if (*d == ',') {
			d++;
			continue;
		}
		if ((w = parse_width(d, 1)) != -1) {
			if ((unsigned)fp->n > (MAXINT - sizeof(struct frameset_param)) / sizeof(int) - 1) overalloc();
			fp = mem_realloc(fp, sizeof(struct frameset_param) + (fp->n + 1) * sizeof(int));
			fp->width[fp->n++] = w;
		}
		if (!(d = strchr(d, ','))) break;