[evolution/wip/mcrha/webkit-jsc-api] e-selection.js: Cover some corner cases and replace compare to NaN

[Milan Crha <mcrha src gnome org>]

commit 1071fe9c904192bb54e1747fa386abbde405db0b
Author: Milan Crha <mcrha redhat com>
Date:   Mon Oct 21 09:24:38 2019 +0200

    e-selection.js: Cover some corner cases and replace compare to NaN

 data/webkit/e-selection.js | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)
---
diff --git a/data/webkit/e-selection.js b/data/webkit/e-selection.js
index 885b6e165c..e099ec28cb 100644
--- a/data/webkit/e-selection.js
+++ b/data/webkit/e-selection.js
@@ -30,9 +30,6 @@ EvoSelection.GetChildPath = function(parent, childNode)
                array[array.length] = index;
        }
 
-       if (!array.length)
-               return null;
-
        return array.reverse();
 }
 
@@ -114,7 +111,7 @@ EvoSelection.Store = function(doc)
 
        var selection = {}, sel = doc.getSelection();
 
-       selection["baseElem"] = EvoSelection.GetChildPath(doc.body, sel.baseNode);
+       selection["baseElem"] = sel.baseNode ? EvoSelection.GetChildPath(doc.body, sel.baseNode) : [];
        selection["baseOffset"] = sel.baseOffset + EvoSelection.GetOverallTextOffset(sel.baseNode);
 
        if (!sel.isCollapsed) {
@@ -224,15 +221,19 @@ EvoSelection.FromString = function(str)
 
                        array = str.substr(1, str.length - 2).split(",");
 
-                       if (!array || !array.length) {
+                       if (!array) {
                                return null;
                        }
 
-                       for (ii = 0; ii < array.length; ii++) {
-                               array[ii] = parseInt(array[ii], 10);
+                       if (array.length == 1 && array[0] == "") {
+                               array.length = 0;
+                       } else {
+                               for (ii = 0; ii < array.length; ii++) {
+                                       array[ii] = parseInt(array[ii], 10);
 
-                               if (array[ii] == NaN) {
-                                       return null;
+                                       if (!Number.isInteger(array[ii])) {
+                                               return null;
+                                       }
                                }
                        }
 
@@ -262,7 +263,7 @@ EvoSelection.FromString = function(str)
                        var value;
 
                        value = parseInt(split_str[ii].slice(name.length + 1), 10);
-                       if (value && value != NaN) {
+                       if (Number.isInteger(value)) {
                                selection[name] = value;
                        }
                        continue;
@@ -279,7 +280,7 @@ EvoSelection.FromString = function(str)
                        var value;
 
                        value = parseInt(split_str[ii].slice(name.length + 1), 10);
-                       if (value && value != NaN) {
+                       if (Number.isInteger(value)) {
                                selection[name] = value;
                        }
                }