From e1c11bd2060a8aa125346a15415b54e951acb960 Mon Sep 17 00:00:00 2001
From: Shannan Finley <shannan@fixus.com.au>
Date: Tue, 11 Oct 2016 09:42:01 +1100
Subject: [PATCH] Allow ellipsis "pages" to be used as buttons by logically
 finding the previous or next page required for the current page set.

---
 dirPagination.js       | 25 +++++++++++++++++++++----
 dirPagination.tpl.html |  2 +-
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/dirPagination.js b/dirPagination.js
index a1a7265..1253cf7 100644
--- a/dirPagination.js
+++ b/dirPagination.js
@@ -326,10 +326,27 @@
                 }
             });
 
-            scope.setCurrent = function(num) {
-                if (paginationService.isRegistered(paginationId) && isValidPageNumber(num)) {
-                    num = parseInt(num, 10);
-                    paginationService.setCurrentPage(paginationId, num);
+            scope.setCurrent = function (num, index) {
+                if (paginationService.isRegistered(paginationId)) {
+                    if (num === '...') {
+                        /* Ellipsis entry */
+                        // setCurrent is being called on an ellipsis, so assume that it's being used as a button and we need to work out where it should go.
+                        if (index === 1) { // Opening Ellipsis
+                            // Get the first page after the opening ellipsis to find which page comes before it. For example, given the page set 1 ... 15, 16, 17, selecting the opening ellipsis,
+                            // would result in page 14 (scope.pages[index + 1] = 15 - 1 = 14) becoming selected.
+                            num = scope.pages[index + 1] - 1; // Verbose for clarity.
+                        }
+                        else { // Closing Ellipsis
+                            // Get the last page before the closing ellipsis to find which page should come next.
+                            num = scope.pages[index - 1] + 1;
+                        }
+                    }
+
+                    if (isValidPageNumber(num)) {
+                        num = parseInt(num, 10);
+
+                        paginationService.setCurrentPage(paginationId, num);
+                    }
                 }
             };
 
diff --git a/dirPagination.tpl.html b/dirPagination.tpl.html
index db98d4c..0219d82 100644
--- a/dirPagination.tpl.html
+++ b/dirPagination.tpl.html
@@ -6,7 +6,7 @@
         <a href="" ng-click="setCurrent(pagination.current - 1)">&lsaquo;</a>
     </li>
     <li ng-repeat="pageNumber in pages track by tracker(pageNumber, $index)" ng-class="{ active : pagination.current == pageNumber, disabled : pageNumber == '...' }">
-        <a href="" ng-click="setCurrent(pageNumber)">{{ pageNumber }}</a>
+        <a href="" ng-click="setCurrent(pageNumber, $index)">{{ pageNumber }}</a>
     </li>
 
     <li ng-if="directionLinks" ng-class="{ disabled : pagination.current == pagination.last }">