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%{
/*
# ------------------------------------------------------------------------
# Copyright 2020-2022, Harald Lieder, mailto:harald.lieder@outlook.com
# License: GNU AFFERO GPL 3.0, https://www.gnu.org/licenses/agpl-3.0.html
#
# Part of "PyMuPDF", a Python binding for "MuPDF" (http://mupdf.com), a
# lightweight PDF, XPS, and E-book viewer, renderer and toolkit which is
# maintained and developed by Artifex Software, Inc. https://artifex.com.
# ------------------------------------------------------------------------
*/
//-----------------------------------------------------------------------------
// perform some cleaning if we have /EmbeddedFiles:
// (1) remove any /Limits if /Names exists
// (2) remove any empty /Collection
// (3) set /PageMode/UseAttachments
//-----------------------------------------------------------------------------
void JM_embedded_clean(fz_context *ctx, pdf_document *pdf)
{
pdf_obj *root = pdf_dict_get(ctx, pdf_trailer(ctx, pdf), PDF_NAME(Root));
// remove any empty /Collection entry
pdf_obj *coll = pdf_dict_get(ctx, root, PDF_NAME(Collection));
if (coll && pdf_dict_len(ctx, coll) == 0)
pdf_dict_del(ctx, root, PDF_NAME(Collection));
pdf_obj *efiles = pdf_dict_getl(ctx, root,
PDF_NAME(Names),
PDF_NAME(EmbeddedFiles),
PDF_NAME(Names),
NULL);
if (efiles) {
pdf_dict_put_name(ctx, root, PDF_NAME(PageMode), "UseAttachments");
}
return;
}
//-----------------------------------------------------------------------------
// embed a new file in a PDF (not only /EmbeddedFiles entries)
//-----------------------------------------------------------------------------
pdf_obj *JM_embed_file(fz_context *ctx,
pdf_document *pdf,
fz_buffer *buf,
char *filename,
char *ufilename,
char *desc,
int compress)
{
size_t len = 0;
pdf_obj *ef, *f, *params, *val = NULL;
fz_buffer *buff2 = NULL;
fz_var(buff2);
fz_try(ctx) {
val = pdf_new_dict(ctx, pdf, 6);
pdf_dict_put_dict(ctx, val, PDF_NAME(CI), 4);
ef = pdf_dict_put_dict(ctx, val, PDF_NAME(EF), 4);
pdf_dict_put_text_string(ctx, val, PDF_NAME(F), filename);
pdf_dict_put_text_string(ctx, val, PDF_NAME(UF), ufilename);
pdf_dict_put_text_string(ctx, val, PDF_NAME(Desc), desc);
pdf_dict_put(ctx, val, PDF_NAME(Type), PDF_NAME(Filespec));
buff2 = fz_new_buffer_from_copied_data(ctx, " ", 1);
f = pdf_add_stream(ctx, pdf, buff2, NULL, 0);
pdf_dict_put_drop(ctx, ef, PDF_NAME(F), f);
JM_update_stream(ctx, pdf, f, buf, compress);
len = fz_buffer_storage(ctx, buf, NULL);
pdf_dict_put_int(ctx, f, PDF_NAME(DL), len);
pdf_dict_put_int(ctx, f, PDF_NAME(Length), len);
params = pdf_dict_put_dict(ctx, f, PDF_NAME(Params), 4);
pdf_dict_put_int(ctx, params, PDF_NAME(Size), len);
}
fz_always(ctx) {
fz_drop_buffer(ctx, buff2);
}
fz_catch(ctx) {
fz_rethrow(ctx);
}
return val;
}
%}
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