Enable accessing background window from content script with tri.bg

src/background.ts

@@ -4,6 +4,7 @@
 
 import * as proxy_background from "@src/lib/browser_proxy_background"
 import * as controller from "@src/lib/controller"
+import { omniscient_controller } from "@src/lib/omniscient_controller"
 import * as perf from "@src/perf"
 import { listenForCounters } from "@src/perf"
 import * as messaging from "@src/lib/messaging"
@@ -259,6 +260,7 @@ const messages = {
         downloadUrlAs: download_background.downloadUrlAs,
     },
     browser_proxy_background: { shim: proxy_background.shim },
+    omniscient_background: omniscient_controller,
 }
 export type Messages = typeof messages
 

src/content.ts

@@ -96,6 +96,7 @@ const excmds = await import("@src/.excmds_content.generated")
 const finding_content = await import("@src/content/finding")
 const itertools = await import("@src/lib/itertools")
 const messaging = await import("@src/lib/messaging")
+const backgroundProxy = await import("@src/lib/tabs")
 const State = await import("@src/state")
 const webext = await import("@src/lib/webext")
 const perf = await import("@src/perf")
@@ -208,6 +209,7 @@ config.getAsync("preventautofocusjackhammer").then(allowautofocus => {
 })
 ;(window as any).tri = Object.assign(Object.create(null), {
     browserBg: webext.browserBg,
+    bg: backgroundProxy.backgroundProxy,
     commandline_content,
     convert,
     config,

src/excmds.ts

@@ -5853,6 +5853,7 @@ async function js_helper(str: string[]) {
  *     - -r load the js source from a Javascript file relative to your RC file. (NB: will throw an error if no RC file exists)
  *
  * Some of Tridactyl's functions are accessible here via the `tri` object. Just do `console.log(tri)` in the web console on the new tab page to see what's available.
+ * `tri.bg` is an object enabling access to the background script's context. It works similarly to the `tri.tabs` objects documented in the [[jsb]] documentation.
  *
  * If you want to pipe an argument to `js`, you need to use the "-p" flag or "-d" flag with an argument and then use the JS_ARG global variable, e.g:
  *

src/lib/tabs.ts

@@ -1,10 +1,13 @@
 import * as Messaging from "@src/lib/messaging"
 
 const allTabs = -1
+const background = -2
 
 const msg = (tabId, ...args) => {
     if (tabId === allTabs) {
         return Messaging.messageAllTabs("omniscient_content", ...args)
+    } else if (tabId === background) {
+        return (Messaging.message as any)("omniscient_background", args[0], args[1][0])
     } else {
         return Messaging.messageTab(tabId, "omniscient_content", ...args)
     }
@@ -85,3 +88,5 @@ export const tabsProxy = new Proxy(Object.create(null), {
         throw new Error(`'tabs' object can only be accessed by a number (e.g. tabs[3]) or a string (e.g. tabs.document or tabs['document']). Type of accessor: "${typeof p}"`)
     },
 })
+
+export const backgroundProxy = tabProxy(background, [])