From 116c7fa0c31811cde1508ac70d8ae6de58edd66a Mon Sep 17 00:00:00 2001
From: martindholmes <mholmes@uvic.ca>
Date: Wed, 8 Jun 2022 17:00:00 -0700
Subject: [PATCH] Beginning new work on timeline pre-calc for issue #50.

---
 xsl/functions_module.xsl | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/xsl/functions_module.xsl b/xsl/functions_module.xsl
index 6c99364..2a26ec5 100644
--- a/xsl/functions_module.xsl
+++ b/xsl/functions_module.xsl
@@ -273,6 +273,23 @@
     </xsl:choose>
   </xsl:function>
   
+  <xd:doc>
+    <xd:desc><xd:ref type="function" name="hcmc:getFeatureIdsForTimelinePoint">hcmc:getFeatureIdsForTimelinePoint</xd:ref>
+    is passed a timeline point and retrieves the ids of all features which have a dateTime range which overlaps with
+    the point. This is used to construct a richer timeline structure which obviates the need to check through all 
+    features in the JavaScript to look for time matches every time the timeline moves.</xd:desc>
+    <xd:param name="timelinePoint" as="xs:string">A timeline point in the form of a slash-delimited range.</xd:param>
+    <xd:param name="places" as="element(place)*">A sequence of zero or more TEI place elements which may or may not 
+    have timing information in the form of date elements in its location/desc.</xd:param>
+    <xd:return>A sequence of feature ids.</xd:return>
+  </xd:doc>
+  <xsl:function name="hcmc:getFeatureIdsForTimelinePoint" as="xs:string*">
+    <xsl:param name="timelinePoint" as="xs:string"/>
+    <xsl:param name="places" as="element(place)*"/>
+    
+    
+  </xsl:function>
+  
   <xd:doc>
     <xd:desc><xd:ref type="function" name="hcmc:expandDateTime" as="xs:string*">hcmc:expandDateTime</xd:ref>
       receives a date or datetime string and expands it to a complete datetime