(Optionally) embed ly source files inside generated PDF

By using the new -dembed-source-code command line switch,
users may now include their LilyPond source code in the
generated PDF (using the pdfmark EMBED feature); although
the PDF is not modified in any visible way, embedded .ly
files should appear in viewers that support this feature
(other viewers should degrade gracefully).

This patch adds a new ly:source-files function (with
an optional parser arg) that allows to retrieve the list
of (non distribution-provided) ly files involved in
making the current score.

1 files changed, 25 insertions, 0 deletions

diff --git a/lily/sources.cc b/lily/sources.cc
index b42300f47a..5d865fe706 100644
--- a/lily/sources.cc
+++ b/lily/sources.cc
@@ -86,3 +86,28 @@ Sources::~Sources ()
     }
 }
 
+#include "lily-parser.hh"
+#include "lily-lexer.hh"
+#include "lily-imports.hh"
+#include "fluid.hh"
+
+LY_DEFINE (ly_source_files, "ly:source-files", 0, 1, 0,
+           (SCM parser_smob),
+           "A list of LilyPond files being processed;"
+           "a PARSER may optionally be specified.")
+{
+
+  if (SCM_UNBNDP (parser_smob))
+    parser_smob = scm_fluid_ref (Lily::f_parser);
+  Lily_parser *parser = LY_ASSERT_SMOB (Lily_parser, parser_smob, 1);
+  Includable_lexer *lex = parser->lexer_;
+
+  SCM lst = SCM_EOL;
+  for (vector<string>::const_iterator
+       i = lex->file_name_strings_.begin();
+       i != lex->file_name_strings_.end(); ++i)
+       {
+         lst = scm_cons (ly_string2scm (*i), lst);
+       }
+  return scm_reverse_x (lst, SCM_EOL);
+}