From 941933ed3d1ae7247e4a27c54efb92bdcbd188a8 Mon Sep 17 00:00:00 2001
From: John Christopher Anderson <jchris@apache.org>
Date: Mon, 2 Feb 2009 20:27:03 +0000
Subject: add iteration numbers to list row functions. closes COUCHDB-233.
 thanks Benoit Chesneau.

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@740094 13f79535-47bb-0310-9956-ffa450edef68
---
 share/server/main.js            | 14 +++++++++++---
 share/www/script/couch_tests.js | 20 +++++++++++++++-----
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/share/server/main.js b/share/server/main.js
index 723bf655..53ccc012 100644
--- a/share/server/main.js
+++ b/share/server/main.js
@@ -13,6 +13,7 @@
 var cmd;
 var funs = [];        // holds functions used for computation
 var map_results = []; // holds temporary emitted values during doc map
+var row_line = {}; // holds row number in list per func
 
 var sandbox = null;
 
@@ -350,18 +351,25 @@ while (cmd = eval(readline())) {
         var listFun = funs[0];
         var head = cmd[1];
         var req = cmd[2];
-        runRenderFunction(listFun, [head, null, req]);
+        row_line[listFun] = 0;
+        runRenderFunction(listFun, [head, null, req, null]);
         break;
       case "list_row":
         var listFun = funs[0];
         var row = cmd[1];
         var req = cmd[2];
-        runRenderFunction(listFun, [null, row, req]);
+        runRenderFunction(listFun, [null, row, req, row_line[listFun]]);
+        row_line[listFun]++;
         break;
       case "list_tail":
         var listFun = funs[0];
         var req = cmd[1];
-        runRenderFunction(listFun, [null, null, req]);
+        var row_number = null;
+        try {
+            row_number = row_line[listFun];
+            delete row_line[listFun];
+        } catch (e) {}
+        runRenderFunction(listFun, [null, null, req, row_number]);
         break;
       default:
         print(toJSON({error: "query_server_error",
diff --git a/share/www/script/couch_tests.js b/share/www/script/couch_tests.js
index e7f8abdb..db1bccf0 100644
--- a/share/www/script/couch_tests.js
+++ b/share/www/script/couch_tests.js
@@ -2677,10 +2677,14 @@ var tests = {
         }
       },
       lists: {
-        simpleForm: stringFun(function(head, row, req) {
+        simpleForm: stringFun(function(head, row, req, row_number) {
           if (row) {
             // we ignore headers on rows and tail
-            return {body : '\n<li>Key: '+row.key+' Value: '+row.value+'</li>'};
+            return {
+                    body : '\n<li>Key: '+row.key
+                    +' Value: '+row.value
+                    +' LineNo: '+row_number+'</li>'
+            };
           } else if (head) {
             // we return an object (like those used by external and show)
             // so that we can specify headers
@@ -2695,7 +2699,7 @@ var tests = {
             return {body : '</ul>'};
           }
         }),
-        acceptSwitch: stringFun(function(head, row, req) {
+        acceptSwitch: stringFun(function(head, row, req, row_number) {
           return respondWith(req, {
             html : function() {
               // If you're outputting text and you're not setting
@@ -2704,7 +2708,8 @@ var tests = {
                 return "HTML <ul>";
               } else if (row) {
                 return '\n<li>Key: '
-                  +row.key+' Value: '+row.value+'</li>';
+                  +row.key+' Value: '+row.value
+                  +' LineNo: '+row_number+'</li>';
               } else { // tail
                 return "</ul>";
               }
@@ -2747,7 +2752,12 @@ var tests = {
     T(xhr.status == 200);
     T(/Total Rows/.test(xhr.responseText));
     T(/Key: 1/.test(xhr.responseText));
-    
+    T(/LineNo: 0/.test(xhr.responseText));
+    T(/LineNo: 5/.test(xhr.responseText));
+
+    var lines = xhr.responseText.split('\n');
+    T(/LineNo: 5/.test(lines[6]));
+
     // get with query params
     var xhr = CouchDB.request("GET", "/test_suite_db/_list/lists/simpleForm/basicView?startkey=3");
     T(xhr.status == 200);
-- 
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