1 files changed, 96 insertions, 5 deletions

diff --git a/tex/context/base/strc-lnt.mkvi b/tex/context/base/strc-lnt.mkvi
index 9b93ba07f..4160360d2 100644
--- a/tex/context/base/strc-lnt.mkvi
+++ b/tex/context/base/strc-lnt.mkvi
@@ -50,6 +50,7 @@
 
 \unexpanded\def\strc_linenotes_start#1[#2]#3%
   {\global\advance\c_strc_linenotes\plusone
+   \keepunwantedspaces
    \strc_linenotes_indeed{#1}{#2}{#3}%
    \strc_linenotes_traced{#2}%
    \startline[#2]}
@@ -57,19 +58,109 @@
 \unexpanded\def\strc_linenotes_stop[#1]%
   {\stopline[#1]}
 
-\unexpanded\def\strc_linenotes_indeed#1#2#3% will be redone
+\let\m_page_lines_previous_to  \relax
+\let\m_page_lines_previous_from\relax
+
+\let\m_page_lines_current_to   \relax
+\let\m_page_lines_current_from \relax
+
+\newconditional\c_page_lines_current_to
+\newconditional\c_page_lines_current_from
+
+\installcorenamespace{linenotespreviousfrom}
+\installcorenamespace{linenotespreviousto}
+
+\letvalue\??linenotespreviousfrom\empty
+\letvalue\??linenotespreviousto  \empty
+
+\def\page_lines_in_from{\in[lr:b:\currentlinenotereference]}
+\def\page_lines_in_to  {\in[lr:e:\currentlinenotereference]}
+
+\unexpanded\def\strc_linenotes_range_normal#1% order
+  {\doifreferencefoundelse{lr:b:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_from
+   \ifconditional\c_page_lines_current_from
+      \xdef\m_page_lines_current_from{\currentreferencelinenumber}%
+      \doifreferencefoundelse{lr:e:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_to
+      \ifconditional\c_page_lines_current_to
+        \xdef\m_page_lines_current_to{\currentreferencelinenumber}%
+        \page_lines_in_from
+        \ifx\m_page_lines_current_from\m_page_lines_current_to \else
+          \endash
+          \page_lines_in_to
+        \fi
+      \else
+        \page_lines_in_from
+      \fi
+   \else
+     \page_lines_in_from
+   \fi}
+
+\unexpanded\def\strc_linenotes_range_sparse#1% order
+  {\doifreferencefoundelse{lr:b:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_from
+   \ifconditional\c_page_lines_current_from
+     \xdef\m_page_lines_current_from{\currentreferencelinenumber}%
+     \doifreferencefoundelse{lr:e:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_to
+     \ifconditional\c_page_lines_current_to
+       \xdef\m_page_lines_current_to{\currentreferencelinenumber}%
+       \ifx\m_page_lines_previous_from\m_page_lines_current_from
+         \ifx\m_page_lines_previous_to\m_page_lines_current_to
+           \notationparameter\c!compressseparator
+         \else
+           \page_lines_in_from
+         \fi
+       \else
+         \page_lines_in_from
+         \ifx\m_page_lines_current_from\m_page_lines_current_to
+         \else
+           \endash
+           \page_lines_in_to
+         \fi
+       \fi
+     \else
+       \page_lines_in_from
+     \fi
+   \else
+     \ifx\m_page_lines_previous_from\m_page_lines_current_from
+       \notationparameter\c!compressseparator
+     \else
+       \page_lines_in_from
+     \fi
+   \fi}
+
+\let\currentlinenotereference\empty
+
+\unexpanded\def\strc_linenotes_indeed#1#2#3%
   {\begingroup
    % we keep things local so we can use it as regular note too
-   \unexpanded\def\linenotelinenumber##1{\inlinerange[#2]}% ##1 == order
-%    \setupnotation[#1][\c!numbercommand=\linenotelinenumber]% todo: deep hook
-%    \setupnote[#1][\c!textcommand=\gobbleoneargument]% todo: deep hook
    \edef\currentnotation{#1}%
+   \edef\currentlinenotereference{#2}%
+   \xdef\m_page_lines_previous_from{\csname\??linenotespreviousfrom\ifcsname\??linenotespreviousfrom\currentnotation\endcsname\currentnotation\fi\endcsname}%
+   \xdef\m_page_lines_previous_to  {\csname\??linenotespreviousto  \ifcsname\??linenotespreviousto  \currentnotation\endcsname\currentnotation\fi\endcsname}%
+   \doifelse{\notationparameter\c!compress}\v!yes
+     {\let\linenotelinenumber\strc_linenotes_range_sparse}%
+     {\let\linenotelinenumber\strc_linenotes_range_normal}%
    \let\currentnote\currentnotation
    \letnotationparameter\c!numbercommand\linenotelinenumber% todo: deep hook
    \letnoteparameter    \c!textcommand  \gobbleoneargument % todo: deep hook
-   \relax\getvalue{\??linenote#1}{#3}%
+   \getvalue{\??linenote\currentnotation}{#3}%
+   \expandafter\glet\csname\??linenotespreviousfrom\currentnotation\endcsname\m_page_lines_current_from
+   \expandafter\glet\csname\??linenotespreviousto  \currentnotation\endcsname\m_page_lines_current_to
    \endgroup}
 
+% where to hook this one in? resetcounter has no hook:
+
+\unexpanded\def\doresetlinenotecompression#1% \strc_linenotes_reset_previous
+  {\expandafter\glet\csname\??linenotespreviousfrom#1\endcsname\empty
+   \expandafter\glet\csname\??linenotespreviousto  #1\endcsname\empty}
+
+\definesymbol
+  [\v!compressseparator]
+  [\space\hbox{\vl\thinspace\vl}]
+
+\setupnotations
+  [%c\compress=\v!no,
+   \c!compressseparator=\symbol\v!compressseparator]
+
 \let\strc_linenotes_traced\gobbleoneargument
 
 \def\strc_linenotes_traced_indeed#1%