Split communal/utility functions into `common.js`

`common.js` will be prepended to other JS files using the Makefile.

Makefile

@@ -0,0 +1,9 @@
+default: all
+
+all: popup
+
+clean:
+	rm pages/popup.js
+
+popup:
+	cat common.js pages/popup.src.js > pages/popup.js

common.js

@@ -0,0 +1,21 @@
+// Saves a search-group of the given `name`, containing all search-engines of
+// `preset` (which is an array of search-engine display-names truncated to 7 chars).
+function savepreset(preset, name) {
+    let presets = Array();
+    let presetName = name.replace(',', ' ');
+    try { presets = localStorage.getItem('presets').split(','); } catch {}
+
+    try { localStorage.removeItem('preset_' + presetName); } catch {}
+
+    presets = removefromarray(removeredundantitems(presets), presetName);
+    presets.push(presetName);
+
+    localStorage.setItem('preset_' + presetName, preset);
+    localStorage.setItem('presets', presets);
+}
+
+
+// Load an array of all saved preset's names.
+function loadpresets() {
+    try { return localStorage.getItem('presets').split(','); } catch { return []; }
+}

manifest.json

@@ -2,18 +2,21 @@
 
   "manifest_version": 2,
   "name": "Multi engine search",
-  "version": "1.1",
+  "version": "1.2",
 
-  "description": "Search on Multiple search engines.",
+  "description": "Search with multiple search engines simultaneously.",
-  "homepage_url": "https://github.com/Javojav/Multi-engine-search",
+  "homepage_url": "https://notabug.org/jadedctrl/octosearch",
 
   "icons": {
     "48": "icons/icon.png"
   },
 
-  "permissions": [
+    "permissions": [
-    "search"
+	"search",
-  ],
+	"webRequest",
+	"webRequestBlocking",
+	"*://octosearch.invalid/*"
+    ],
 
   "commands": {
     "_execute_browser_action": {
@@ -25,8 +28,14 @@
 
   "browser_action": {
       "default_icon": "icons/icon.png",
-      "default_title": "Multi engine search",
+      "default_title": "OctoSearch",
       "default_popup": "pages/popup.html"
+  },
+
+    "background": {
+	"scripts": [
+	    "background.js"
+	]
     }
 
 }

pages/popup.src.js

@@ -19,8 +19,7 @@ const populateengines = (engines) => {
 
 const populatepresets = () => {
   let presetDropdown = document.getElementById("presets");
-  let presets = Array();
+  let presets = loadpresets()
-  try { presets = localStorage.getItem('presets').split(','); } catch {}
 
   while (presetDropdown.firstChild) {
     presetDropdown.removeChild(presetDropdown.lastChild);
@@ -71,25 +70,6 @@ const enablepreset = (preset) => {
   }
 }
 
-const savepreset = (preset, name) => {
-  let presets = Array();
-  let presetName = name.replace(',', ' ');
-  try { presets = localStorage.getItem('presets').split(','); } catch {}
-
-  try { localStorage.removeItem('preset_' + presetName); } catch {}
-
-  presets = removefromarray(removeredundantitems(presets), presetName);
-  presets.push(presetName);
-
-  localStorage.setItem('preset_' + presetName, preset);
-  localStorage.setItem('presets', presets);
-
-  // Update UI & listed presets
-  resetsearchbox(true);
-  populatepresets();
-  enablepresetbyname(name);
-}
-
 const removecurrentpreset = () => {
   let presetName = document.getElementById("presets").value;
   if (presetName == "noPreset" || presetName == "newPreset")
@@ -138,13 +118,17 @@ const engineselection = () => {
 }
 
 const saveselection = () => {
-  let textbox = document.getElementById("searchbox");
+    let textbox = document.getElementById("searchbox");
-  let selection = document.getElementById("presets").value;
+    let selection = document.getElementById("presets").value;
-  let name = selection;
+    let name = selection;
 
-  if (selection == "newPreset")
+    if (selection == "newPreset")
-    name = textbox.value;
+	name = textbox.value;
-  savepreset(engineselection(), name);
+    savepreset(engineselection(), name);
+    // Update UI & listed presets
+    resetsearchbox(true);
+    populatepresets();
+    enablepresetbyname(name);
 }
 
 const onpresetselected = (event) => {