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#include "mupdf/pdf.h"
pdf_obj *pdf_get_inheritable(fz_context *ctx, pdf_document *doc, pdf_obj *obj, char *key)
{
pdf_obj *fobj = NULL;
while (!fobj && obj)
{
fobj = pdf_dict_gets(ctx, obj, key);
if (!fobj)
obj = pdf_dict_gets(ctx, obj, "Parent");
}
return fobj ? fobj : pdf_dict_gets(ctx, pdf_dict_gets(ctx, pdf_dict_gets(ctx, pdf_trailer(ctx, doc), "Root"), "AcroForm"), key);
}
char *pdf_get_string_or_stream(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
int len = 0;
char *buf = NULL;
fz_buffer *strmbuf = NULL;
char *text = NULL;
fz_var(strmbuf);
fz_var(text);
fz_try(ctx)
{
if (pdf_is_string(ctx, obj))
{
len = pdf_to_str_len(ctx, obj);
buf = pdf_to_str_buf(ctx, obj);
}
else if (pdf_is_stream(ctx, doc, pdf_to_num(ctx, obj), pdf_to_gen(ctx, obj)))
{
strmbuf = pdf_load_stream(ctx, doc, pdf_to_num(ctx, obj), pdf_to_gen(ctx, obj));
len = fz_buffer_storage(ctx, strmbuf, (unsigned char **)&buf);
}
if (buf)
{
text = fz_malloc(ctx, len+1);
memcpy(text, buf, len);
text[len] = 0;
}
}
fz_always(ctx)
{
fz_drop_buffer(ctx, strmbuf);
}
fz_catch(ctx)
{
fz_free(ctx, text);
fz_rethrow(ctx);
}
return text;
}
char *pdf_field_value(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
return pdf_get_string_or_stream(ctx, doc, pdf_get_inheritable(ctx, doc, field, "V"));
}
int pdf_get_field_flags(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
return pdf_to_int(ctx, pdf_get_inheritable(ctx, doc, obj, "Ff"));
}
static char *get_field_type_name(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
return pdf_to_name(ctx, pdf_get_inheritable(ctx, doc, obj, "FT"));
}
int pdf_field_type(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
char *type = get_field_type_name(ctx, doc, obj);
int flags = pdf_get_field_flags(ctx, doc, obj);
if (!strcmp(type, "Btn"))
{
if (flags & Ff_Pushbutton)
return PDF_WIDGET_TYPE_PUSHBUTTON;
else if (flags & Ff_Radio)
return PDF_WIDGET_TYPE_RADIOBUTTON;
else
return PDF_WIDGET_TYPE_CHECKBOX;
}
else if (!strcmp(type, "Tx"))
return PDF_WIDGET_TYPE_TEXT;
else if (!strcmp(type, "Ch"))
{
if (flags & Ff_Combo)
return PDF_WIDGET_TYPE_COMBOBOX;
else
return PDF_WIDGET_TYPE_LISTBOX;
}
else if (!strcmp(type, "Sig"))
return PDF_WIDGET_TYPE_SIGNATURE;
else
return PDF_WIDGET_TYPE_NOT_WIDGET;
}
void pdf_set_field_type(fz_context *ctx, pdf_document *doc, pdf_obj *obj, int type)
{
int setbits = 0;
int clearbits = 0;
char *typename = NULL;
switch(type)
{
case PDF_WIDGET_TYPE_PUSHBUTTON:
typename = "Btn";
setbits = Ff_Pushbutton;
break;
case PDF_WIDGET_TYPE_CHECKBOX:
typename = "Btn";
clearbits = Ff_Pushbutton;
setbits = Ff_Radio;
break;
case PDF_WIDGET_TYPE_RADIOBUTTON:
typename = "Btn";
clearbits = (Ff_Pushbutton|Ff_Radio);
break;
case PDF_WIDGET_TYPE_TEXT:
typename = "Tx";
break;
case PDF_WIDGET_TYPE_LISTBOX:
typename = "Ch";
clearbits = Ff_Combo;
break;
case PDF_WIDGET_TYPE_COMBOBOX:
typename = "Ch";
setbits = Ff_Combo;
break;
case PDF_WIDGET_TYPE_SIGNATURE:
typename = "Sig";
break;
}
if (typename)
pdf_dict_puts_drop(ctx, obj, "FT", pdf_new_name(ctx, doc, typename));
if (setbits != 0 || clearbits != 0)
{
int bits = pdf_to_int(ctx, pdf_dict_gets(ctx, obj, "Ff"));
bits &= ~clearbits;
bits |= setbits;
pdf_dict_puts_drop(ctx, obj, "Ff", pdf_new_int(ctx, doc, bits));
}
}
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