Fix compatibility with csquotes (close #21)

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fix an infinite loop error when bib entry keys contain hyphens or undercores ([#18](https://github.com/zepinglee/citeproc-lua/issues/18)).
 - Fix incorrect item position in note style ([#20](https://github.com/zepinglee/citeproc-lua/issues/20)).
+- Fix compatibility with `\blockquote` of `csquotes` ([#21](https://github.com/zepinglee/citeproc-lua/issues/21)).
 
 ## [v0.1.1] - 2022-03-21
 

citeproc/citeproc-latex.lua

@@ -19,6 +19,8 @@ csl.uncited_id_list = {}
 csl.uncited_id_map = {}
 csl.citations_pre = {}
 
+csl.preview_mode = false  -- Whether to use citeproc:preview_citation
+
 
 function csl.error(str)
   luatexbase.module_error("csl", str)
@@ -89,7 +91,14 @@ function csl.cite(citation_info)
 
   local citation = core.make_citation(citation_info)
 
-  local citation_str = csl.engine:process_citation(citation)
+  local citation_str
+  if csl.preview_mode then
+    -- TODO: preview mode in first pass of \blockquote of csquotes
+    -- citation_str = csl.engine:preview_citation(citation)
+    citation_str = ""
+  else
+    citation_str = csl.engine:process_citation(citation)
+  end
 
   tex.sprint(string.format("{%s}{%s}", csl.style_class, citation_str))
   -- tex.sprint(citation_str)

latex/citation-style-language.sty

@@ -1025,6 +1025,19 @@
   }
 
 
+% csquotes
+
+\AtEndOfPackageFile* { csquotes }
+  {
+    \BlockquoteDisable
+      {
+        \cs_set_eq:NN \__csl_make_citation:NN \use_none:nn
+        % \sys_if_engine_luatex:T
+        %   { \lua_now:n { csl.preview_mode = true } }
+      }
+  }
+
+
 % hyperref
 
 % The hyperref package also patches \bibcite but it cannot provide hyperlinks

test/latex/luatex-1-csquotes.lvt

@@ -0,0 +1,37 @@
+\input{regression-test}
+
+\documentclass{article}
+
+\input{csl-test}
+\pagestyle{empty}
+
+\usepackage{citation-style-language}
+
+\usepackage{csquotes}
+
+\cslsetup{style = chicago-note-bibliography}
+\addbibresource{test.bib}
+
+
+\begin{document}
+
+\START
+\showoutput
+
+% https://github.com/zepinglee/citeproc-lua/issues/21
+
+\enquote{Lorem ipsum.\cite{ITEM-1}}
+
+\blockquote{Lorem ipsum.\cite{ITEM-2}}
+
+\blockquote{%
+  Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
+  Ut purus elit, vestibulum ut, placerat ac, adipiscing vitae, felis.
+  Curabitur dictum gravida mauris.
+  Nam arcu libero, nonummy eget, consectetuer id, vulputate a, magna.
+  Donec vehicula augue eu neque.\cite{ITEM-2}
+}
+
+\clearpage
+
+\end{document}