static void add_field_hierarchy_to_array(pdf_obj *array, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_gets(field, "Kids");
pdf_obj *exclude = pdf_dict_gets(field, "Exclude");
if (exclude)
return;
pdf_array_push(array, field);
if (kids)
{
int i, n = pdf_array_len(kids);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(array, pdf_array_get(kids, i));
}
}
static void add_field_hierarchy_to_array(fz_context *ctx, pdf_obj *array, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
pdf_obj *exclude = pdf_dict_get(ctx, field, PDF_NAME_Exclude);
if (exclude)
return;
pdf_array_push(ctx, array, field);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(ctx, array, pdf_array_get(ctx, kids, i));
}
}
/*
When resetting or submitting a form, the fields to act upon are defined
by an array of either field references or field names, plus a flag determining
whether to act upon the fields in the array, or all fields other than those in
the array. specified_fields interprets this information and produces the array
of fields to be acted upon.
*/
static pdf_obj *specified_fields(pdf_document *doc, pdf_obj *fields, int exclude)
{
fz_context *ctx = doc->ctx;
pdf_obj *form = pdf_dict_getp(pdf_trailer(doc), "Root/AcroForm/Fields");
int i, n;
pdf_obj *result = pdf_new_array(doc, 0);
pdf_obj *nil = NULL;
fz_var(nil);
fz_try(ctx)
{
/* The 'fields' array not being present signals that all fields
* should be acted upon, so handle it using the exclude case - excluding none */
if (exclude || !fields)
{
/* mark the fields we don't want to act upon */
nil = pdf_new_null(doc);
n = pdf_array_len(fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(fields, i);
if (pdf_is_string(field))
field = pdf_lookup_field(form, pdf_to_str_buf(field));
if (field)
pdf_dict_puts(field, "Exclude", nil);
}
/* Act upon all unmarked fields */
n = pdf_array_len(form);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(result, pdf_array_get(form, i));
/* Unmark the marked fields */
n = pdf_array_len(fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(fields, i);
if (pdf_is_string(field))
field = pdf_lookup_field(form, pdf_to_str_buf(field));
if (field)
pdf_dict_dels(field, "Exclude");
}
}
else
{
n = pdf_array_len(fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(fields, i);
if (pdf_is_string(field))
field = pdf_lookup_field(form, pdf_to_str_buf(field));
if (field)
add_field_hierarchy_to_array(result, field);
}
}
}
fz_always(ctx)
{
pdf_drop_obj(nil);
}
fz_catch(ctx)
{
pdf_drop_obj(result);
fz_rethrow(ctx);
}
return result;
}
