static void match_condition(struct expression *expr)
{
if (expr->type == EXPR_ASSIGNMENT)
match_condition(expr->left);
if (get_state_expr(my_id, expr) == &filehandle) {
char *name;
name = expr_to_var(expr);
sm_msg("error: comparing a filehandle against zero '%s'", name);
set_state_expr(my_id, expr, &oktocheck);
free_string(name);
}
}
static int
match_condition(fz_css_condition *cond, fz_xml *node)
{
if (!cond)
return 1;
switch (cond->type) {
default: return 0;
case ':': return 0; /* don't support pseudo-classes */
case '#': if (!match_id_condition(node, cond->val)) return 0; break;
case '.': if (!match_class_condition(node, cond->val)) return 0; break;
}
return match_condition(cond->next, node);
}
static int
match_condition(fz_css_condition *cond, fz_xml *node)
{
if (!cond)
return 1;
switch (cond->type) {
default: return 0;
case ':': return 0; /* don't support pseudo-classes */
case '#': if (!match_att_is_condition(node, "id", cond->val)) return 0; break;
case '.': if (!match_att_has_condition(node, "class", cond->val)) return 0; break;
case '[': if (!match_att_exists_condition(node, cond->key)) return 0; break;
case '=': if (!match_att_is_condition(node, cond->key, cond->val)) return 0; break;
case '~': if (!match_att_has_condition(node, cond->key, cond->val)) return 0; break;
case '|': if (!match_att_is_condition(node, cond->key, cond->val)) return 0; break;
}
return match_condition(cond->next, node);
}
static int
match_selector(fz_css_selector *sel, fz_xml *node)
{
if (!node)
return 0;
if (sel->combine)
{
/* descendant */
if (sel->combine == ' ')
{
fz_xml *parent = fz_xml_up(node);
while (parent)
{
if (match_selector(sel->left, parent))
if (match_selector(sel->right, node))
return 1;
parent = fz_xml_up(parent);
}
return 0;
}
/* child */
if (sel->combine == '>')
{
fz_xml *parent = fz_xml_up(node);
if (!parent)
return 0;
if (!match_selector(sel->left, parent))
return 0;
if (!match_selector(sel->right, node))
return 0;
}
/* adjacent */
if (sel->combine == '+')
{
fz_xml *prev = fz_xml_prev(node);
while (prev && !fz_xml_tag(prev))
prev = fz_xml_prev(prev);
if (!prev)
return 0;
if (!fz_xml_tag(prev))
return 0;
if (!match_selector(sel->left, prev))
return 0;
if (!match_selector(sel->right, node))
return 0;
}
}
if (sel->name)
{
if (strcmp(sel->name, fz_xml_tag(node)))
return 0;
}
if (sel->cond)
{
if (!match_condition(sel->cond, node))
return 0;
}
return 1;
}
