From e85300a8245c8f4109fedee7a4d7d6df599bc2a9 Mon Sep 17 00:00:00 2001
From: Frank Bennett <biercenator@gmail.com>
Date: Sun, 4 Mar 2018 14:52:22 +0900
Subject: [PATCH] A little more help for page ranges

---
 src/util_number.js | 10 +++++-----
 src/util_page.js   | 10 ++++++----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/src/util_number.js b/src/util_number.js
index 4a829951d..0c4ad7685 100644
--- a/src/util_number.js
+++ b/src/util_number.js
@@ -244,10 +244,10 @@ CSL.Engine.prototype.processNumber = function (node, ItemObject, variable, type)
             info.labelVisibility = false;
         }
         
-        var m = val.match(/^([a-zA-Z0]*)([0-9]+(?:[a-zA-Z]*|[-,a-zA-Z]+))$/);
-        //var m = val.match(/^([a-zA-Z]0*)([0-9]+(?:[a-zA-Z]*|[-,a-zA-Z]+))$/);
+        var m = val.match(/^([0-9]*[a-zA-Z]+0*)?([0-9]+(?:[a-zA-Z]*|[-,a-zA-Z]+))$/);
+        //var m = val.match(/^([0-9]*[a-zA-Z]0*)([0-9]+(?:[a-zA-Z]*|[-,a-zA-Z]+))$/);
         if (m) {
-            info.particle = m[1];
+            info.particle = m[1] ? m[1] : "";
             info.value = m[2];
         } else {
             info.particle = "";
@@ -602,7 +602,7 @@ CSL.Engine.prototype.processNumber = function (node, ItemObject, variable, type)
         } else {
             str = values[i-1].value + stripHyphenBackslash(values[i-1].joiningSuffix) + values[i].value;
         }
-        var m = str.match(/^([a-zA-Z]?0*)([0-9]+)(\s*[^0-9]+\s*)([-,a-zA-Z]?0*)([0-9]+)$/);
+        var m = str.match(/^((?:[0-9]*[a-zA-Z]+0*))?([0-9]+)(\s*[^0-9]+\s*)([-,a-zA-Z]?0*)([0-9]+)$/);
         if (m) {
             var rangeDelimiter = m[3];
             rangeDelimiter = fixupRangeDelimiter(variable, val, rangeDelimiter, values[i].numeric);
@@ -844,7 +844,7 @@ CSL.Util.outputNumericField = function(state, varname, itemID) {
             }
         }
         if (num.collapsible) {
-            if (num.value.match(/^[0-9]+$/)) {
+            if (num.value.match(/^[1-9][0-9]*$/)) {
                 var blob = new CSL.NumericBlob(num.particle, parseInt(num.value, 10), numStyling, itemID);
             } else {
                 var blob = new CSL.NumericBlob(num.particle, num.value, numStyling, itemID);
diff --git a/src/util_page.js b/src/util_page.js
index c118cbf99..81b0d09d9 100644
--- a/src/util_page.js
+++ b/src/util_page.js
@@ -7,7 +7,7 @@ CSL.Util.PageRangeMangler.getFunction = function (state, rangeType) {
     
     var range_delimiter = state.getTerm(rangeType + "-range-delimiter");
 
-    rangerex = /([a-zA-Z]*)([0-9]+)\s*(?:\u2013|-)\s*([a-zA-Z]*)([0-9]+)/;
+    rangerex = /([0-9]*[a-zA-Z]+0*)?([0-9]+)\s*(?:\u2013|-)\s*([0-9]*[a-zA-Z]+0*)?([0-9]+)/;
 
     stringify = function (lst) {
         len = lst.length;
@@ -30,8 +30,10 @@ CSL.Util.PageRangeMangler.getFunction = function (state, rangeType) {
         var delimRex = new RegExp("([^\\\\])[-" + this_range_delimiter + "\\u2013]", "g");
         str = str.replace(delimRex, "$1 - ").replace(/\s+-\s+/g, " - ");
         // Workaround for Internet Explorer
-        var rexm = new RegExp("([a-zA-Z]*[0-9]+" + hyphens + "[a-zA-Z]*[0-9]+)", "g");
-        var rexlst = new RegExp("[a-zA-Z]*[0-9]+" + hyphens + "[a-zA-Z]*[0-9]+");
+        //var rexm = new RegExp("((?:[0-9]*[a-zA-Z]+)?[0-9]+" + hyphens + "(?:[0-9]*[a-zA-Z]+)?[0-9]+)", "g");
+        //var rexlst = new RegExp("(?:[0-9]*[a-zA-Z]+)?[0-9]+" + hyphens + "(?:[0-9]*[a-zA-Z]+)?[0-9]+");
+        var rexm = new RegExp("((?:[0-9]*[a-zA-Z]+0*)?[0-9]+" + hyphens + "(?:[0-9]*[a-zA-Z]+0*)?[0-9]+)", "g");
+        var rexlst = new RegExp("(?:[0-9]*[a-zA-Z]+0*)?[0-9]+" + hyphens + "(?:[0-9]*[a-zA-Z]+0*)?[0-9]+");
         m = str.match(rexm);
         lst = str.split(rexlst);
         if (lst.length === 0) {
@@ -58,7 +60,7 @@ CSL.Util.PageRangeMangler.getFunction = function (state, rangeType) {
                         m[4] = m[2].slice(0, (m[2].length - m[4].length)) + m[4];
                     }
                     if (parseInt(m[2], 10) < parseInt(m[4], 10)) {
-                        m[3] = range_delimiter + m[1];
+                        m[3] = range_delimiter + (m[1] ? m[1] : "");
                         lst[pos] = m.slice(1);
                     }
                 }