From 5f5d36de23aa35baad50a12d714b5ca4dbd63824 Mon Sep 17 00:00:00 2001
From: kkapsner <github@mail.kkapsner.de>
Date: Mon, 27 Nov 2017 12:28:01 +0100
Subject: [PATCH] Added dynamic settings content script

Not yet fully usable due to missing detection in frame.js
---
 lib/main.js     | 42 ++++++++++++++++++++++++++++++++++++++++++
 lib/settings.js | 20 +++++++++++++-------
 2 files changed, 55 insertions(+), 7 deletions(-)

diff --git a/lib/main.js b/lib/main.js
index 2c3b804..2c03b29 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -84,6 +84,48 @@
 				});
 			}
 		});
+
+		if (browser.contentScripts){
+			let unregister = function(){};
+			let lastRegistering;
+			const register = function register(){
+				logging.message("Register content script for the settings.");
+				logging.verbose("Unregister old content script, if present.");
+				unregister();
+				var data = {};
+				settings.forEach(function(def){
+					data[def.name] = def.get();
+				});
+				lastRegistering = data;
+				browser.contentScripts.register({
+					matches: ["<all_urls>"],
+					matchAboutBlank: true,
+					allFrames: true,
+					runAt: "document_start",
+					js: [{
+						code: `(function(){
+							const settings = require("./settings");
+							console.log(settings.init(${JSON.stringify(data)}));
+						}())`
+						// code: "(function(){const settings = require(\"./settings\");console.log(settings);}());"
+					}]
+				}).then(function(api){
+					logging.verbose("Content script registered.");
+					if (data !== lastRegistering){
+						logging.verbose("Multiple content scripts registered at once. Remove unnecessary one.");
+						api.unregister();
+					}
+					else {
+						unregister = api.unregister;
+					}
+				});
+			};
+			register();
+			settings.on("any", register);
+		}
+		else {
+			logging.error("Old Firefox does not support browser.contentScript.register()");
+		}
 	});
 	
 	browser.runtime.onInstalled.addListener(function(){
diff --git a/lib/settings.js b/lib/settings.js
index 22f39a0..fc48bdd 100644
--- a/lib/settings.js
+++ b/lib/settings.js
@@ -176,7 +176,13 @@
 	};
 
 	logging.verbose("loading settings");
-	scope.loaded = browser.storage.local.get().then(function(storage){
+	let initialized = false;
+	const initEvents = [];
+	scope.init = function(storage){
+		if (initialized){
+			return false;
+		}
+		initialized = true;
 		logging.message("settings loaded");
 		if (!storage.storageVersion){
 			logging.message("No storage version found. Initializing storage.");
@@ -209,14 +215,14 @@
 			changeValue(name, value);
 		});
 		changeValue("isStillDefault", false);
-		
-		eventHandler.any.forEach(function(callback){
-			callback();
-		});
-	});
+
+		initEvents.forEach(function(callback){callback();});
+		return true;
+	};
+	scope.loaded = browser.storage.local.get().then(scope.init);
 	scope.onloaded = function(callback){
 		if (scope.isStillDefault){
-			scope.loaded.then(function(){callback();});
+			initEvents.push(callback);
 		}
 		else {
 			callback();