Userscripts not loading in iframes

[gpourbaix]

Hello

Thanks for you module, it's working very nicely.

I have noticed that userscripts are not invoked in iframes.
Is it possible to do something about it ?

Best regards,

[JingMatrix]

No, currently this is not implemented yet, and I probably have no time to do it in this year.
For anyone who is interested in implementing this function, please refer to my commenst (the fourth point):
#104 (comment)

[gpourbaix]

Thank for your reply. I did not manage to use CDP in iframe and i felt that it was less stable for main pages.

Just an idea : maybe you could hook shouldInterceptRequest to inject the userscript ? I found an example on stackoverflow :  https://stackoverflow.com/questions/68984756/how-do-i-inject-javascript-to-an-iframe-from-java-code-into-an-android-webview

I'm not an android developper even less an xposed module developper so it's too difficult to do it myself, i've already had a hard time just to compile the code ^^

[JingMatrix]

Once you have configured properly the JDK version (see #125), it should be easy to compile.

As for your idea, it is indeed given in the issue of which I cited my own comment above, though the issue was written in Chinese.
If you are using a WebView browser, you can try hook the shouldInterceptRequest method, see the file
WebView.kt .
(As for chromium browsers, one has to use CDP.)

I believe the logic of WebView.kt is fairly clear, where I hooked the onPageStarted method:

ChromeXt/app/src/main/java/org/matrix/chromext/hook/WebView.kt

Lines 76 to 78 in b969aaf

	findMethod(ViewClient!!, true) { name == "onPageStarted" }
	// public void onPageStarted (WebView view, String url, Bitmap favicon)
	.hookAfter { onUpdateUrl(it.args[1] as String, it.args[0] as WebView) }

You may try to understand it and thus contribute to ChromeXt ;)

[JingMatrix]

I think it is possible to use Page.addScriptToEvaluateOnNewDocument to setup event listeners on each iframe and execute codes from the main frame.

[JingMatrix]

You can inject into frames now, the following scripts fixes font problems for Google Play Books

// ==UserScript==
// @name    Font Loader
// @namespace   JingMatrix
// @match   https://play.google.com/books/reader?id=*
// @match   https://books.googleusercontent.com/books/reader/frame*
// @run-at  document-idle
// @grant   GM_addStyle
// @grant   frames
// @description Fix the problem of custom font loading in browsers on Android 15+
// ==/UserScript==

if (origin == "https://books.googleusercontent.com") {
  console.log("Loaded in the frame");
  const font_lists = [
    "STKaiti",
    "STFangsong",
    "STXingkai",
    "STXihei",
    "STLiti",
  ];

  const style = font_lists
    .map((font) => `@font-face { font-family: ${font}; src: local(${font}); }`)
    .join("\n");

  GM_addStyle(style);
}