OK, now here's a big one: XHTML output for InsetBibtex. It's not perfect---

see the notes---but it does work reasonably well. And it will work a lot
better when an unrelated patch of mine goes in: one that generally improves
the display of BibTeX-derived information.

Note how we use the TOC here, which has already gathered the information we
need. This can also be done for other things.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@30056 a592a061-630c-0410-9148-cb99ea01b6c8

development/HTML/HTML.notes

@@ -17,6 +17,14 @@ These insets do nothing for XHTML:
 	ERT, OptArg, Phantom
 
 These insets work but still need work:
+	InsetBibtex: There are a few issues here. One is that the output is not very
+		nice. This will be solved, though, by a patch of mine I seem to have forgotten
+		to finish. To get output that accorded with the BibTeX style, of course, we'd 
+		have to parse the bbl file. I don't know if that's worth it.
+		Another issue concerns cross-references. At the moment, we simply use the
+		xref information for every entry, rather than listing the xref separately and
+		then referencing it. That should not be terribly hard, but it would take a bit
+		of work.
 	InsetBox: We need a Length::asHTML() method and the like, but it basically works.
 		though the CSS isn't there yet.
 	InsetCitation: This has two limitations as of 11 VI 2009. The first is that we
@@ -37,10 +45,6 @@ May need to make use here of TocWidget::itemInset, which should then be moved
 to TocBackend.
 
 These do not yet work and need some attention:
-	InsetBibtex: We should be able to collect the keys of references in
-		validate() and then use our parsed information to output some sort of
-		bibliography. Formatting is another question, but here again we could
-		try parsing the bbl file.
 	InsetCommand: By default does nothing. That may be right?
 	InsetExternal: I don't understand these so am not sure what to do.
 	InsetFloat: This will need some work, again because I do not really understand

src/insets/InsetBibtex.cpp

@@ -22,8 +22,10 @@
 #include "FuncStatus.h"
 #include "LaTeXFeatures.h"
 #include "MetricsInfo.h"
+#include "output_xhtml.h"
 #include "OutputParams.h"
 #include "TextClass.h"
+#include "TocBackend.h"
 
 #include "frontends/alert.h"
 
@@ -900,9 +902,78 @@ void InsetBibtex::validate(LaTeXFeatures & features) const
 }
 
 
-int InsetBibtex::xhtml(odocstream &, OutputParams const &) const
+namespace {
+	// used in xhtml to sort a list of BibTeXInfo objects
+	bool lSorter(BibTeXInfo const * lhs, BibTeXInfo const * rhs)
+	{
+		return lhs->getAbbreviatedAuthor() < rhs->getAbbreviatedAuthor();
+	}
+}
+
+
+int InsetBibtex::xhtml(odocstream & os, OutputParams const &) const
 {
-	//Toc const & toc = buffer().tocBackend().toc("citation");
+	// We are going to collect all the citation keys used in the document,
+	// getting them from the TOC.
+	Toc const & toc = buffer().tocBackend().toc("citation");
+	Toc::const_iterator it = toc.begin();
+	Toc::const_iterator en = toc.end();
+	vector<docstring> citekeys;
+	for (; it != en; ++it) {
+		if (it->str().empty())
+			continue;
+		vector<docstring> keys = getVectorFromString(it->str());
+		vector<docstring>::const_iterator dit = keys.begin();
+		vector<docstring>::const_iterator den = keys.end();
+		for (; dit != den; ++dit)
+			citekeys.push_back(*dit);
+	}
+	if (citekeys.empty())
+		return 0;
+	sort(citekeys.begin(), citekeys.end());
+	unique(citekeys.begin(), citekeys.end());
+	// We now have a sorted, unique list of the keys used in this document.
+	// We will now convert it to a list of the BibTeXInfo objects used in 
+	// this document...
+	// FIXME We need to do something here about cross-references, if we
+	// want to be able to display them AS cross-references. Probably the
+	// easiest thing to do is to loop over the list again and add whatever
+	// cross-references we find, then sort and unique it, planning just to
+	// add the cross-references to the bibliography.
+	vector<BibTeXInfo const *> binfo;
+	vector<docstring>::const_iterator cit = citekeys.begin();
+	vector<docstring>::const_iterator cen = citekeys.end();
+	BiblioInfo const & bi = buffer().masterBibInfo();
+	for (; cit != cen; ++cit) {
+		BiblioInfo::const_iterator bt = bi.find(*cit);
+		if (bt == bi.end())
+			continue;
+		binfo.push_back(&(bt->second));
+	}
+	// ...and sort it.
+	sort(binfo.begin(), binfo.end(), lSorter);
+	// Finally, then, we are ready for output.
+	os << "<h2 class='bibliography'>" << _("References") << "</h2>\n";
+	os << "<div class='bibliography'>\n";
+	vector<BibTeXInfo const *>::const_iterator vit = binfo.begin();
+	vector<BibTeXInfo const *>::const_iterator ven = binfo.end();
+	// Now we loop over the entries
+	for (; vit != ven; ++vit) {
+		BibTeXInfo const * bip = *vit;
+		os << "<p class='bibliography'>";
+		os << "<a name='" << html::htmlize(bip->key()) << "'></a>";
+		docstring label = bip->label();
+		if (label.empty())
+			label = bip->key();
+		os << "<span class='biblabel'>[" << label << "]</span> ";
+		// FIXME Right now, we are calling BibInfo::getInfo on the key,
+		// which will give us all the cross-referenced info. But for every
+		// entry.
+		os << "<span class='bibinfo'>" << bi.getInfo(bip->key()) << "</span>";
+		os << "</p>\n";
+	}
+		
+	os << "</div>\n";
 	return 0;
 }