From c51d33799eb56675292b65ef0cc04ef97ba02f6f Mon Sep 17 00:00:00 2001
From: Jez Ng
Date: Wed, 18 Jan 2012 22:37:05 +0800
Subject: Add migration code for old localStorage values.

Finish up the wrapping of localStorage. All background code should now
modify localStorage via settings.js rather than doing it directly.
---
 background/settings.js | 15 +++++++++++++++
 background_page.html   | 11 +++--------
 lib/utils.js           |  8 ++++++++
 manifest.json          |  2 +-
 options.html           |  1 +
 5 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/background/settings.js b/background/settings.js
index 4792429d..51ac053c 100644
--- a/background/settings.js
+++ b/background/settings.js
@@ -35,6 +35,19 @@ var settings = {
     nextPatterns: "next,more,>,\u2192,\xbb,\u226b,>>",
   },
 
+  init: function() {
+    // settingsVersion was introduced in v1.31, and is used to coordinate data migration. We do not use
+    // previousVersion as it is used to coordinate the display of the upgrade message, and is not updated
+    // early enough when the extension loads.
+    // 1.31 was also the version where we converted all localStorage values to JSON.
+    if (!this.has("settingsVersion")) {
+      for (var key in localStorage) {
+        localStorage[key] = JSON.stringify(localStorage[key]);
+      }
+      this.set("settingsVersion", utils.getCurrentVersion());
+    }
+  },
+
   get: function(key) {
     if (!(key in localStorage))
       return this.defaultSettings[key];
@@ -59,3 +72,5 @@ var settings = {
   },
 
 };
+
+settings.init();
diff --git a/background_page.html b/background_page.html
index 7f8bb2a6..d72f3fc9 100644
--- a/background_page.html
+++ b/background_page.html
@@ -5,12 +5,7 @@
 <script type="text/javascript" src="lib/utils.js"></script>
 <script type="text/javascript" src="background/settings.js"></script>
 <script type="text/javascript" charset="utf-8">
-  // Chromium #15242 will make this XHR request to access the manifest unnecessary.
-  var manifestRequest = new XMLHttpRequest();
-  manifestRequest.open("GET", chrome.extension.getURL("manifest.json"), false);
-  manifestRequest.send(null);
-
-  var currentVersion = JSON.parse(manifestRequest.responseText).version;
+  var currentVersion = utils.getCurrentVersion();
 
   var tabQueue = {}; // windowId -> Array
   var openTabs = {}; // tabId -> object with various tab properties
@@ -617,7 +612,7 @@
     // installs.
     if (!settings.get("previousVersion"))
       settings.set("previousVersion", currentVersion);
-    return compareVersions(currentVersion, localStorage.previousVersion) == 1;
+    return compareVersions(currentVersion, settings.get("previousVersion")) == 1;
   }
 
   function openOptionsPageInNewTab() {
@@ -695,7 +690,7 @@
     // In version 1.22, we changed the mapping for "d" and "u" to be scroll page down/up instead of close
     // and restore tab. For existing users, we want to preserve existing behavior for them by adding some
     // custom key mappings on their behalf.
-    if (localStorage.previousVersion == "1.21") {
+    if (settings.get("previousVersion") == "1.21") {
       var customKeyMappings = settings.get("keyMappings") || "";
       if ((keyToCommandRegistry["d"] || {}).command == "scrollPageDown")
         customKeyMappings += "\nmap d removeTab";
diff --git a/lib/utils.js b/lib/utils.js
index df325138..8aada3a1 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,4 +1,12 @@
 var utils = {
+  getCurrentVersion: function() {
+    // Chromium #15242 will make this XHR request to access the manifest unnecessary.
+    var manifestRequest = new XMLHttpRequest();
+    manifestRequest.open("GET", chrome.extension.getURL("manifest.json"), false);
+    manifestRequest.send(null);
+    return JSON.parse(manifestRequest.responseText).version;
+  },
+
   /*
    * Takes a dot-notation object string and call the function
    * that it points to with the correct value for 'this'.
diff --git a/manifest.json b/manifest.json
index 23f80f77..2f863bc3 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
   "name": "Vimium",
-  "version": "1.30",
+  "version": "1.31",
   "description": "The Hacker's Browser. Vimium provides keyboard shortcuts for navigation and control in the spirit of Vim.",
   "icons": {  "16": "icons/icon16.png",
               "48": "icons/icon48.png",
diff --git a/options.html b/options.html
index e4142b4d..02186412 100644
--- a/options.html
+++ b/options.html
@@ -1,6 +1,7 @@
 <html>
   <head>
     <title>Vimium Options</title>
+    <script src="lib/utils.js"></script>
     <script src="background/settings.js"></script>
     <style type="text/css" media="screen">
       body {
-- 
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