html_tbl.c

来自「this is the file used to browse web」· C语言 代码 · 共 1,263 行 · 第 1/3 页

		get_valign(t_attr, &l_val);
		get_bgcolor(t_attr, &l_col);
		y++, x = 0;
		goto see;
	}
	if (t_namelen == 5 && ((!casecmp(t_name, "THEAD", 5)) || (!casecmp(t_name, "TBODY", 5)) || (!casecmp(t_name, "TFOOT", 5)))) {
		if (c_span) new_columns(t, c_span, c_width, c_al, c_val, 1);
		if (lbhp) (*bad_html)[*bhp-1].e = html, lbhp = NULL;
		group = 2;
	}
	if (t_namelen != 2 || (casecmp(t_name, "TD", 2) && casecmp(t_name, "TH", 2))) goto see;
	if (c_span) new_columns(t, c_span, c_width, c_al, c_val, 1);
	if (lbhp) (*bad_html)[*bhp-1].e = html, lbhp = NULL;
	if (p) CELL(t, x, y)->end = html, p = 0;
	if (y == -1) y = 0, x = 0;
	nc:
	cell = new_cell(t, x, y);
	if (cell->used) {
		if (cell->colspan == -1) goto see;
		x++;
		goto nc;
	}
	cell->mx = x;
	cell->my = y;
	cell->used = 1;
	cell->start = en;
	p = 1;
	cell->align = l_al;
	cell->valign = l_val;
	if ((cell->b = upcase(t_name[1]) == 'H')) cell->align = AL_CENTER;
	if (group == 1) cell->group = 1;
	if (x < t->c) {
		if (t->cols[x].align != AL_TR) cell->align = t->cols[x].align;
		if (t->cols[x].valign != VAL_TR) cell->valign = t->cols[x].valign;
	}
	memcpy(&cell->bgcolor, &l_col, sizeof(struct rgb));
	get_align(t_attr, &cell->align);
	get_valign(t_attr, &cell->valign);
	get_bgcolor(t_attr, &cell->bgcolor);
	if ((csp = get_num(t_attr, "colspan")) == -1) csp = 1;
	if (!csp) csp = -1;
	if ((rsp = get_num(t_attr, "rowspan")) == -1) rsp = 1;
	if (!rsp) rsp = -1;
	if (csp >= 0 && rsp >= 0 && csp * rsp > 100000) {
		if (csp > 10) csp = -1;
		if (rsp > 10) rsp = -1;
	}
	cell->colspan = csp;
	cell->rowspan = rsp;
	if (csp == 1) {
		int w = W_AUTO;
		get_c_width(t_attr, &w, sh);
		if (w != W_AUTO) set_td_width(t, x, w, 0);
	}
	qqq = t->x;
	for (i = 1; csp != -1 ? i < csp : x + i < qqq; i++) {
		struct table_cell *sc = new_cell(t, x + i, y);
		if (sc->used) {
			csp = i;
			for (k = 0; k < i; k++) CELL(t, x + k, y)->colspan = csp;
			break;
		}
		sc->used = sc->spanned = 1;
		sc->rowspan = rsp;
		sc->colspan = csp;
		sc->mx = x;
		sc->my = y;
	}
	qqq = t->y;
	for (j = 1; rsp != -1 ? j < rsp : y + j < qqq; j++) {
		for (k = 0; k < i; k++) {
			struct table_cell *sc = new_cell(t, x + k, y + j);
			if (sc->used) {
				int l, m;
				if (sc->mx == x && sc->my == y) continue;
				/*internal("boo");*/
				for (l = 0; l < k; l++) memset(CELL(t, x + l, y + j), 0, sizeof(struct table_cell));
				rsp = j;
				for (l = 0; l < i; l++) for (m = 0; m < j; m++) CELL(t, x + l, y + m)->rowspan = j;
				goto brk;
			}
			sc->used = sc->spanned = 1;
			sc->rowspan = rsp;
			sc->colspan = csp;
			sc->mx = x;
			sc->my = y;
		}
	}
	brk:
	goto see;

	scan_done:
	*end = html;

	for (x = 0; x < t->x; x++) for (y = 0; y < t->y; y++) {
		struct table_cell *c = CELL(t, x, y);
		if (!c->spanned) {
			if (c->colspan == -1) c->colspan = t->x - x;
			if (c->rowspan == -1) c->rowspan = t->y - y;
		}
	}

	if ((unsigned)t->y > MAXINT / sizeof(int)) overalloc();
	t->r_heights = mem_alloc(t->y * sizeof(int));
	memset(t->r_heights, 0, t->y * sizeof(int));

	for (x = 0; x < t->c; x++) if (t->cols[x].width != W_AUTO) set_td_width(t, x, t->cols[x].width, 1);
	set_td_width(t, t->x, W_AUTO, 0);

	return t;
}

void get_cell_width(char *start, char *end, int cellpd, int w, int a, int *min, int *max, int n_link, int *n_links)
{
	struct part *p;
	if (min) *min = -1;
	if (max) *max = -1;
	if (n_links) *n_links = n_link;
	if (!(p = format_html_part(start, end, AL_LEFT, cellpd, w, NULL, !!a, !!a, NULL, n_link))) return;
	if (min) *min = p->x;
	if (max) *max = p->xmax;
	if (n_links) *n_links = p->link_num;
	/*if (min && max && *min > *max) internal("get_cell_width: %d > %d", *min, *max);*/
	mem_free(p);
}

static inline void check_cell_widths(struct table *t)
{
	int i, j;
	for (j = 0; j < t->y; j++) for (i = 0; i < t->x; i++) {
		int min, max;
		struct table_cell *c = CELL(t, i, j);
		if (!c->start) continue;
		get_cell_width(c->start, c->end, t->cellpd, 0, 0, &min, &max, c->link_num, NULL);
		/*if (min != c->min_width || max < c->max_width) internal("check_cell_widths failed");*/
	}
}

#define g_c_w(cc)							\
do {									\
		struct table_cell *c = cc;				\
		if (!c->start) continue;				\
		c->link_num = nl;					\
		get_cell_width(c->start, c->end, t->cellpd, 0, 0, &c->min_width, &c->max_width, nl, &nl);\
} while (0)

void get_cell_widths(struct table *t)
{
	int nl = t->p->link_num;
	int i, j;
	if (!d_opt->table_order)
		for (j = 0; j < t->y; j++) for (i = 0; i < t->x; i++) g_c_w(CELL(t, i, j));
	else
		for (i = 0; i < t->x; i++) for (j = 0; j < t->y; j++) g_c_w(CELL(t, i, j));
	t->link_num = nl;
}

void dst_width(int *p, int n, int w, int *lim)
{
	int i, s = 0, d, r;
	for (i = 0; i < n; i++) s += p[i];
	if (s >= w) return;
	if (!n) return;
	again:
	d = (w - s) / n;
	r = (w - s) % n;
	w = 0;
	for (i = 0; i < n; i++) {
		p[i] += d + (i < r);
		if (lim && p[i] > lim[i]) w += p[i] - lim[i], p[i] = lim[i];
	}
	if (w) {
		/*if (!lim) internal("bug in dst_width");*/
		lim = NULL;
		s = 0;
		goto again;
	}
}

int get_vline_width(struct table *t, int col)
{			/* return: -1 none, 0, space, 1 line, 2 double */
	int w = 0;
	if (!col) return -1;
	if (t->rules == R_COLS || t->rules == R_ALL) w = t->cellsp;
	else if (t->rules == R_GROUPS) w = col < t->c && t->cols[col].group;
	if (!w && t->cellpd) w = -1;
	return w;
}

int get_hline_width(struct table *t, int row)
{
	int w = 0;
	if (!row) return -1;
	if (t->rules == R_ROWS || t->rules == R_ALL) {
		x:
		if (t->cellsp || t->vcellpd) return t->cellsp;
		return -1;
	}
	else if (t->rules == R_GROUPS) {
		int q;
		for (q = 0; q < t->x; q++) if (CELL(t, q, row)->group) goto x;
		return t->vcellpd ? 0 : -1;
	}
	if (!w && !t->vcellpd) w = -1;
	return w;
}
	
int get_column_widths(struct table *t)
{
	int i, j, s, ns;
	if ((unsigned)t->x > MAXINT / sizeof(int)) overalloc();
	if (!t->min_c) t->min_c = mem_alloc(t->x * sizeof(int));
	if (!t->max_c) t->max_c = mem_alloc(t->x * sizeof(int));
	if (!t->w_c) t->w_c = mem_alloc(t->x * sizeof(int));
	memset(t->min_c, 0, t->x * sizeof(int));
	memset(t->max_c, 0, t->x * sizeof(int));
	s = 1;
	do {
		ns = MAXINT;
		for (i = 0; i < t->x; i++) for (j = 0; j < t->y; j++) {
			struct table_cell *c = CELL(t, i, j);
			if (c->spanned || !c->used) continue;
			if (c->colspan + i > t->x) {
				/*internal("colspan out of table");
				return -1;*/
				continue;
			}
			if (c->colspan == s) {
				int k, p = 0;
				/*int pp = t->max_c[i];*/
				int m = 0;
				for (k = 1; k < s; k++) {
					p += get_vline_width(t, i + k) >= 0;
					/*pp += t->max_c[i + k];*/
				}
				/*if (0 && s > 1 && (t->p->data || t->p->xp)) {
					int d, cc = (!!(t->frame & F_LHS) + !!(t->frame & F_RHS)) * !!t->border;
					for (d = 0; d < t->c; c++) {
						cc += t->max_c[d];
						if (d > 0) d += get_vline_width(t, d) >= 0;
					}
					if (cc >= t->width) goto nd;
					if (cc + c->max_width - p - pp >= t->width) {
						m = cc + c->max_width - p - pp - t->width;
					}
				}*/
				dst_width(t->min_c + i, s, c->min_width - p, t->max_c + i);
				dst_width(t->max_c + i, s, c->max_width - p - m, NULL);
				for (k = 0; k < s; k++) if (t->min_c[i + k] > t->max_c[i + k]) t->max_c[i + k] = t->min_c[i + k];
			} else if (c->colspan > s && c->colspan < ns) ns = c->colspan;
		}
	} while ((s = ns) != MAXINT);
	return 0;
}

void get_table_width(struct table *t)
{
	int i, vl;
	int min = 0, max = 0;
	for (i = 0; i < t->x; i++) {
		vl = get_vline_width(t, i) >= 0;
		min += vl, max += vl;
		min += t->min_c[i];
		if (t->xcols[i] > t->max_c[i]) max += t->xcols[i];
		max += t->max_c[i];
	}
	vl = (!!(t->frame & F_LHS) + !!(t->frame & F_RHS)) * !!t->border;
	min += vl, max += vl;
	t->min_t = min;
	t->max_t = max;
	/*if (min > max) internal("min(%d) > max(%d)", min, max);*/
}

void distribute_widths(struct table *t, int width)
{
	int i;
	int d = width - t->min_t;
	int om = 0;
	char *u;
	int *w, *mx;
	int mmax_c = 0;
	if (!t->x) return;
	if (d < 0) {
		/*internal("too small width %d, required %d", width, t->min_t);*/
		return;
	}
	for (i = 0; i < t->x; i++) if (t->max_c[i] > mmax_c) mmax_c = t->max_c[i];
	memcpy(t->w_c, t->min_c, t->x * sizeof(int));
	t->rw = width;
	if ((unsigned)t->x > MAXINT / sizeof(int)) overalloc();
	u = mem_alloc(t->x);
	w = mem_alloc(t->x * sizeof(int));
	mx = mem_alloc(t->x * sizeof(int));
	while (d) {
		int mss, mii;
		int p = 0;
		int wq;
		int dd;
		memset(w, 0, t->x * sizeof(int));
		memset(mx, 0, t->x * sizeof(int));
		for (i = 0; i < t->x; i++) {
			switch (om) {
				case 0:
					if (t->w_c[i] < t->xcols[i]) {
						w[i] = 1, mx[i] = (t->xcols[i] > t->max_c[i] ? t->max_c[i] : t->xcols[i]) - t->w_c[i];
						if (mx[i] <= 0) w[i] = 0;
					}
					break;
				case 1:
					if (t->xcols[i] < -1 && t->xcols[i] != -2) {
						w[i] = t->xcols[i] <= -2 ? -2 - t->xcols[i] : 1;
						mx[i] = t->max_c[i] - t->w_c[i];
						if (mx[i] <= 0) w[i] = 0;
					}
					break;
				case 2:
				case 3:
					if (t->w_c[i] < t->max_c[i] && (om == 3 || t->xcols[i] == W_AUTO)) {
						mx[i] = t->max_c[i] - t->w_c[i];
						if (mmax_c) w[i] = 5 + t->max_c[i] * 10 / mmax_c;
						else w[i] = 1;
					}
					break;
				case 4:
					if (t->xcols[i] >= 0) {
						w[i] = 1, mx[i] = t->xcols[i] - t->w_c[i];
						if (mx[i] <= 0) w[i] = 0;
					}
					break;
				case 5:
					if (t->xcols[i] < 0) w[i] = t->xcols[i] <= -2 ? -2 - t->xcols[i] : 1, mx[i] = MAXINT;
					break;
				case 6:
					w[i] = 1, mx[i] = MAXINT;
					break;
				default:
					/*internal("could not expand table");*/
					goto end2;
			}
			p += w[i];
		}
		if (!p) {
			om++;
			continue;
		}
		wq = 0;
		if (u) memset(u, 0, t->x);
		dd = d;
		a:
		mss = 0; mii = -1;
		for (i = 0; i < t->x; i++) if (w[i]) {
			int ss;
			if (u && u[i]) continue;
			if (!(ss = dd * w[i] / p)) ss = 1;
			if (ss > mx[i]) ss = mx[i];
			if (ss > mss) mss = ss, mii = i;
		}
		if (mii != -1) {
			int q = t->w_c[mii];
			if (u) u[mii] = 1;
			t->w_c[mii] += mss;
			d -= t->w_c[mii] - q;
			while (d < 0) t->w_c[mii]--, d++;
			if (t->w_c[mii] < q) {
				/*internal("shrinking cell");*/
				t->w_c[mii] = q;
			}
			wq = 1;
			if (d) goto a;
		} else if (!wq) om++;
	}
	end2:
	mem_free(mx);
	mem_free(w);
	if (u) mem_free(u);
}

#ifdef HTML_TABLE_2ND_PASS
void check_table_widths(struct table *t)
{
	int *w;
	int i, j;
	int s, ns;
	int m, mi = 0; /* go away, warning! */
	if ((unsigned)t->x > MAXINT / sizeof(int)) overalloc();
	w = mem_alloc(t->x * sizeof(int));
	memset(w, 0, t->x * sizeof(int));
	for (j = 0; j < t->y; j++) for (i = 0; i < t->x; i++) {
		struct table_cell *c = CELL(t, i, j);
		int k, p = 0;
		if (!c->start) continue;
		for (k = 1; k < c->colspan; k++) p += get_vline_width(t, i + k) >= 0;
		for (k = 0; k < c->colspan; k++) p += t->w_c[i + k];
		get_cell_width(c->start, c->end, t->cellpd, p, 1, &c->x_width, NULL, c->link_num, NULL);
		if (c->x_width > p) {
			/*int min, max;
			get_cell_width(c->start, c->end, t->cellpd, 0, 0, &min, &max, c->link_num, NULL);
			internal("cell is now wider (%d > %d) min = %d, max = %d, now_min = %d, now_max = %d", c->x_width, p, t->min_c[i], t->max_c[i], min, max);*/
			/* sbohem, internale. chytl jsi mi spoustu chyb v tabulkovaci, ale ted je proste cas jit ... ;-( */
			c->x_width = p;
		}
	}
	s = 1;
	do {
		ns = MAXINT;
		for (i = 0; i < t->x; i++) for (j = 0; j < t->y; j++) {
			struct table_cell *c = CELL(t, i, j);
			if (!c->start) continue;
			if (c->colspan + i > t->x) {
				/*internal("colspan out of table");*/
				mem_free(w);
				return;
			}
			if (c->colspan == s) {
				int k, p = 0;
				for (k = 1; k < s; k++) p += get_vline_width(t, i + k) >= 0;
				dst_width(w + i, s, c->x_width - p, t->max_c + i);
				/*for (k = i; k < i + s; k++) if (w[k] > t->w_c[k]) {
					int l;
					int c;
					ag: