From aaa5e07435fb161255f053182aba1ca97cd5ff3f Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Sun, 16 Jun 2019 11:48:53 +0200
Subject: ruled paper: print vertical lines

---
 src/ruled-paper.ps.j2 | 52 +++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 2 deletions(-)

diff --git a/src/ruled-paper.ps.j2 b/src/ruled-paper.ps.j2
index e13cad3..8e20934 100644
--- a/src/ruled-paper.ps.j2
+++ b/src/ruled-paper.ps.j2
@@ -57,12 +57,23 @@
 /PageWidth  {{ page_width }} def
 /PageHeight {{ page_height }} def
 
+{% if hor_distances %}
 % Horizontal lines
 /HorLinPat {{ hor_distances | length }} array def
 {% for d in hor_distances %}
     HorLinPat {{ loop.revindex0 }} {{ d }} put
 {% endfor %}
 /HorLinSpac {{ hor_spacing }} def     % spacing between groups
+{% endif %}
+
+{% if ver_distances %}
+% Vertical lines
+/VerLinPat {{ ver_distances | length }} array def
+{% for d in ver_distances %}
+    VerLinPat {{ loop.revindex0 }} {{ d }} put
+{% endfor %}
+/VerLinSpac {{ ver_spacing }} def     % spacing between groups
+{% endif %}
 
 % line width and color for thin lines
 /LineSizeThin {{ thin_line_size }} def
@@ -90,8 +101,15 @@
 % From here on you shouldn't worry about changing or configuring anything
 % ------ Variables ------------------------------------------------------------
 
+{% if hor_distances %}
 /HorGrouHeig 0 HorLinPat { add } forall def
 /HorGrouNumb PageHeight BorderBottom sub BorderTop sub HorGrouHeig HorLinSpac add div def
+{% endif %}
+
+{% if ver_distances %}
+/VerGrouHeig 0 VerLinPat { add } forall def
+/VerGrouNumb PageHeight BorderBottom sub BorderTop sub VerGrouHeig VerLinSpac add div def
+{% endif %}
 
 % ------ Procedures -----------------------------------------------------------
  
@@ -105,6 +123,7 @@
   closepath
 } def
 
+{% if hor_distances %}
 /PrintHorGroup { % stk: y
   gsave
   0 exch translate
@@ -117,11 +136,32 @@
         dup BorderLeft exch moveto
         dup PageWidth BorderRight sub exch lineto
     } forall
-    LineSizeThin setlinewidth 
+    LineSizeThin setlinewidth
+    LineColoThin setrgbcolor
+  stroke
+  grestore
+} def
+{% endif %}
+
+{% if ver_distances %}
+/PrintVerGroup { % stk: x
+  gsave
+  0 translate
+  newpath
+    0 BorderRight moveto
+    0 PageHeight BorderTop sub lineto
+    0
+    VerLinPat { % forall
+        add
+        dup BorderBottom moveto
+        dup PageHeight BorderTop sub lineto
+    } forall
+    LineSizeThin setlinewidth
     LineColoThin setrgbcolor
   stroke
   grestore
 } def
+{% endif %}
 
 %%EndProlog
 %%Page: 1
@@ -133,11 +173,19 @@ UsedArea clip
 BackColo setrgbcolor
 UsedArea fill
 
+{% if hor_distances %}
 % print horizontal lines
-
 0 1 HorGrouNumb { % for
     HorGrouHeig HorLinSpac add mul BorderBottom add PrintHorGroup
 } for
+{% endif %}
+
+{% if ver_distances %}
+% print vertical lines
+0 1 VerGrouNumb { % for
+    VerGrouHeig VerLinSpac add mul BorderBottom add PrintVerGroup
+} for
+{% endif %}
 
 % print border (if WillPrintBorder is not 0 )
 WillPrintBorder 0 ne {
-- 
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