notebook/packages/metadata.sty at master · v--/notebook · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
\ExplSyntaxOn

\keys_define:nn { metadata }
  {
    author   .tl_set:N =  \l_nb_metadata_author_tl,
    title    .tl_set:N =  \l_nb_metadata_title_tl,
    subtitle .tl_set:N =  \l_nb_metadata_subtitle_tl,
    url      .tl_set:N =  \l_nb_metadata_url_tl,
    commit   .tl_set:N =  \l_nb_metadata_commit_tl,
    date     .tl_set:N =  \l_nb_metadata_date_tl,
    pdfdate  .tl_set:N =  \l_nb_metadata_pdfdate_tl
  }

\tl_new:N \l_nb_metadata_file_tl

\NewDocumentCommand \SetMetadata {m}
  {
    \keys_set:nn { metadata } {#1}
  }

% hypersetup doesn't play nice with \NewDocumentCommand
\def \GetMetadata #1
  {
    \tl_use:c { l_nb_metadata_#1_tl }
  }

\NewDocumentCommand \TryReadMetadataFile {O{aux/metadata}}
  {
    \file_get:nnNT {#1} {} \l_nb_metadata_file_tl
      {
        \keys_set:nV {metadata} \l_nb_metadata_file_tl
      }
  }

\NewDocumentCommand \SetupPdfMetadata {m}
  {
    \hypersetup
      {
        pdfinfo={
          Title={\GetMetadata{title}},
          Author={\GetMetadata{author}},
          CreationDate={\GetMetadata{pdfdate}}
        }
      }
  }

\ExplSyntaxOff