From cd17d87e47d522c3c848a49ac63602a0a8a1b635 Mon Sep 17 00:00:00 2001
From: Julien Rioux <jrioux@lyx.org>
Date: Mon, 14 Jan 2013 17:26:55 +0100
Subject: [PATCH] Implement plain text export of BibTeX bibliography (fixes
 #8487).

---
 src/insets/InsetBibtex.cpp | 48 ++++++++++++++++++++++++++++++++++++++
 src/insets/InsetBibtex.h   |  2 ++
 2 files changed, 50 insertions(+)

diff --git a/src/insets/InsetBibtex.cpp b/src/insets/InsetBibtex.cpp
index 04d8d2571b..26f0de41f9 100644
--- a/src/insets/InsetBibtex.cpp
+++ b/src/insets/InsetBibtex.cpp
@@ -928,6 +928,54 @@ void InsetBibtex::validate(LaTeXFeatures & features) const
 }
 
 
+int InsetBibtex::plaintext(odocstream & os, OutputParams const &) const
+{
+	BiblioInfo bibinfo = buffer().masterBibInfo();
+	bibinfo.makeCitationLabels(buffer());
+	vector<docstring> const & cites = bibinfo.citedEntries();
+	CiteEngineType const engine_type = buffer().params().citeEngineType();
+	bool const numbers = (engine_type == ENGINE_TYPE_NUMERICAL);
+
+	docstring refoutput;
+	docstring const reflabel = buffer().B_("References");
+
+	refoutput += reflabel + "\n\n";
+
+	// Now we loop over the entries
+	vector<docstring>::const_iterator vit = cites.begin();
+	vector<docstring>::const_iterator const ven = cites.end();
+	for (; vit != ven; ++vit) {
+		BiblioInfo::const_iterator const biit = bibinfo.find(*vit);
+		if (biit == bibinfo.end())
+			continue;
+		BibTeXInfo const & entry = biit->second;
+		docstring citekey;
+		if (numbers)
+			citekey = entry.citeNumber();
+		else {
+			docstring const auth = entry.getAbbreviatedAuthor(buffer(), false);
+			// we do it this way so as to access the xref, if necessary
+			// note that this also gives us the modifier
+			docstring const year = bibinfo.getYear(*vit, buffer(), true);
+			if (!auth.empty() && !year.empty())
+				citekey = auth + ' ' + year;
+		}
+		if (citekey.empty()) {
+			citekey = entry.label();
+			if (citekey.empty())
+				citekey = entry.key();
+		}
+		refoutput += "[" + citekey + "] ";
+		// FIXME Right now, we are calling BibInfo::getInfo on the key,
+		// which will give us all the cross-referenced info. But for every
+		// entry, so there's a lot of repitition. This should be fixed.
+		refoutput += bibinfo.getInfo(entry.key(), buffer(), false) + "\n\n";
+	}
+	os << refoutput;
+	return refoutput.size();
+}
+
+
 // FIXME
 // docstring InsetBibtex::entriesAsXHTML(vector<docstring> const & entries)
 // And then here just: entriesAsXHTML(buffer().masterBibInfo().citedEntries())
diff --git a/src/insets/InsetBibtex.h b/src/insets/InsetBibtex.h
index 3b8510152d..6883191ed6 100644
--- a/src/insets/InsetBibtex.h
+++ b/src/insets/InsetBibtex.h
@@ -52,6 +52,8 @@ public:
 	///
 	void latex(otexstream &, OutputParams const &) const;
 	///
+	int plaintext(odocstream &, OutputParams const &) const;
+	///
 	void collectBibKeys(InsetIterator const &) const;
 	///
 	void validate(LaTeXFeatures &) const;
-- 
2.39.5