Prevent mistaken overwriting of browser.newtab.url when using the browser preferences dialog

2 files changed, 39 insertions, 26 deletions

diff --git a/application/palemoon/components/preferences/newtaburl.js b/application/palemoon/components/preferences/newtaburl.js
index ac0eec1c5..3c82df846 100644
--- a/application/palemoon/components/preferences/newtaburl.js
+++ b/application/palemoon/components/preferences/newtaburl.js
@@ -22,7 +22,11 @@ var gNewtabUrl = {
           return;

         }

       } else {

-        newtabUrlChoice = Services.prefs.getIntPref("browser.newtab.choice");

+        if (this.newtabUrlChoiceIsSet) {

+          newtabUrlChoice = Services.prefs.getIntPref("browser.newtab.choice");

+        } else {

+          newtabUrlChoice = this.getNewtabChoice();

+        }

       }

       if (browserHomepageUrl || browserHomepageUrl == "") {

         if (Services.prefs.getBoolPref("browser.preferences.instantApply")) {

@@ -64,5 +68,35 @@ var gNewtabUrl = {
       } 

       Services.prefs.setCharPref("browser.newtab.url",newtabUrlPref);

     } catch(e) { console.error(e); }

+  },

+

+  /**

+   * Determines the value of browser.newtab.choice based

+   * on the value of browser.newtab.url

+   *

+   * @returns the value of browser.newtab.choice

+   */

+  getNewtabChoice: function() {

+    let newtabUrlPref = Services.prefs.getCharPref("browser.newtab.url");

+    let browserHomepageUrl = Services.prefs.getComplexValue("browser.startup.homepage",

+                              Components.interfaces.nsIPrefLocalizedString).data;

+    let newtabUrlSanitizedPref = browserHomepageUrl.split("|")[0];

+    let defaultStartupHomepage = Services.prefs.getDefaultBranch("browser.")

+                                  .getComplexValue("startup.homepage",

+                                    Components.interfaces.nsIPrefLocalizedString).data;

+    switch (newtabUrlPref) {

+      case "about:logopage": 

+        return 1;

+      case defaultStartupHomepage:

+        return 2;

+      case newtabUrlSanitizedPref:

+        return 3;

+      case "about:newtab":

+        return 4;

+      default: // Custom URL entered.

+        // We need this to consider instantApply.

+        this.newtabPageCustom = newtabUrlPref;

+        return 0;

+    }

   }

 };

diff --git a/application/palemoon/components/preferences/tabs.js b/application/palemoon/components/preferences/tabs.js
index 17084a770..b09cb60df 100644
--- a/application/palemoon/components/preferences/tabs.js
+++ b/application/palemoon/components/preferences/tabs.js
@@ -78,34 +78,13 @@ var gTabsPane = {
   /**
    * Determines the value of the New Tab display drop-down based
    * on the value of browser.newtab.url.
-   *
-   * @returns the appropriate value of browser.newtab.choice
    */
   readNewtabUrl: function() {
-    let newtabUrlPref = document.getElementById("browser.newtab.url");
-    let newtabUrlSanitizedPref = document.getElementById("browser.newtab.myhome");
     let newtabUrlChoice = document.getElementById("browser.newtab.choice");
-    let defaultStartupHomepage = Services.prefs.getDefaultBranch("browser.")
-                                  .getComplexValue("startup.homepage",
-                                    Components.interfaces.nsIPrefLocalizedString).data;
-    switch (newtabUrlPref.value) {
-      case "about:logopage": 
-        newtabUrlChoice.value = 1;
-        break;
-      case defaultStartupHomepage:
-        newtabUrlChoice.value = 2;
-        break;
-      case newtabUrlSanitizedPref.value:
-        newtabUrlChoice.value = 3;
-        break;
-      case "about:newtab":
-        newtabUrlChoice.value = 4;
-        break;
-      default: // Custom URL entered.
-        document.getElementById("newtabPageCustom").hidden = false;
-        newtabUrlChoice.value = 0;
-        // We need this to consider instantApply.
-        this.newtabPageCustom = newtabUrlPref.value;
+    newtabUrlChoice.value = gNewtabUrl.getNewtabChoice();
+    if (newtabUrlChoice.value == 0) {
+      document.getElementById("newtabPageCustom").hidden = false;
     }
+    gNewtabUrl.newtabUrlChoiceIsSet = true;
   }
 };