1 files changed, 35 insertions, 0 deletions
diff --git a/context/data/scite/context/lexers/scite-context-lexer-dummy.lua b/context/data/scite/context/lexers/scite-context-lexer-dummy.lua
new file mode 100644
index 000000000..9465561f3
--- /dev/null
+++ b/context/data/scite/context/lexers/scite-context-lexer-dummy.lua
@@ -0,0 +1,35 @@
+local info = {
+    version   = 1.002,
+    comment   = "scintilla lpeg lexer that triggers whitespace backtracking",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files",
+}
+
+-- the lexer dll doesn't backtrack when there is no embedded lexer so
+-- we need to trigger that, for instance in the bibtex lexer, but still
+-- we get failed lexing
+
+local lexer        = require("lexer")
+local context      = lexer.context
+local patterns     = context.patterns
+
+local token        = lexer.token
+
+local dummylexer   = lexer.new("dummy","scite-context-lexer-dummy")
+local whitespace   = dummylexer.whitespace
+
+local space        = patterns.space
+local nospace      = (1-space)
+
+local t_spacing    = token(whitespace, space  ^1)
+local t_rest       = token("default",  nospace^1)
+
+dummylexer._rules = {
+    { "whitespace", t_spacing },
+    { "rest",       t_rest    },
+}
+
+dummylexer._tokenstyles = context.styleset
+
+return dummylexer