static void update_field_value(pdf_document *doc, pdf_obj *obj, char *text)
{
fz_context *ctx = doc->ctx;
pdf_obj *sobj = NULL;
pdf_obj *grp;
if (!text)
text = "";
/* All fields of the same name should be updated, so
* set the value at the head of the group */
grp = find_head_of_field_group(obj);
if (grp)
obj = grp;
fz_var(sobj);
fz_try(ctx)
{
sobj = pdf_new_string(doc, text, strlen(text));
pdf_dict_puts(obj, "V", sobj);
}
fz_always(ctx)
{
pdf_drop_obj(sobj);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
pdf_field_mark_dirty(doc, obj);
}
static void pdf_field_mark_dirty(pdf_document *doc, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_gets(field, "Kids");
if (kids)
{
int i, n = pdf_array_len(kids);
for (i = 0; i < n; i++)
pdf_field_mark_dirty(doc, pdf_array_get(kids, i));
}
else
{
pdf_dirty_obj(field);
}
}
static void pdf_field_mark_dirty(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
pdf_field_mark_dirty(ctx, doc, pdf_array_get(ctx, kids, i));
}
else
{
pdf_dirty_obj(ctx, field);
}
}
static void reset_field(pdf_document *doc, pdf_obj *field)
{
fz_context *ctx = doc->ctx;
/* Set V to DV whereever DV is present, and delete V where DV is not.
* FIXME: we assume for now that V has not been set unequal
* to DV higher in the hierarchy than "field".
*
* At the bottom of the hierarchy we may find widget annotations
* that aren't also fields, but DV and V will not be present in their
* dictionaries, and attempts to remove V will be harmless. */
pdf_obj *dv = pdf_dict_gets(field, "DV");
pdf_obj *kids = pdf_dict_gets(field, "Kids");
if (dv)
pdf_dict_puts(field, "V", dv);
else
pdf_dict_dels(field, "V");
if (kids == NULL)
{
/* The leaves of the tree are widget annotations
* In some cases we need to update the appearance state;
* in others we need to mark the field as dirty so that
* the appearance stream will be regenerated. */
switch (pdf_field_type(doc, field))
{
case PDF_WIDGET_TYPE_RADIOBUTTON:
case PDF_WIDGET_TYPE_CHECKBOX:
{
pdf_obj *leafv = pdf_get_inheritable(doc, field, "V");
if (leafv)
pdf_keep_obj(leafv);
else
leafv = pdf_new_name(doc, "Off");
fz_try(ctx)
{
pdf_dict_puts(field, "AS", leafv);
}
fz_always(ctx)
{
pdf_drop_obj(leafv);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
break;
case PDF_WIDGET_TYPE_PUSHBUTTON:
break;
default:
pdf_field_mark_dirty(doc, field);
break;
}
}
doc->dirty = 1;
}
