Added INCH code to repo

Signed-off-by: Jacob <jacob@torrey.io>

inch/manifest.json

@@ -0,0 +1,23 @@
+{
+    "manifest_version": 3,
+    "version": "0.2",
+    "name": "AI Noise-cancelling headphones",
+    "author": "jacob@thinkst.com",
+    "description": "An extension to filter out AI-generated noise from your browsing experience",
+    "permissions": [
+        "contextMenus",
+        "storage"
+    ],
+    "content_scripts": [
+        {
+            "js": ["scripts/nch.js"],
+            "matches": [
+                "*://*/*"
+                ]
+        }
+    ],
+    "background": {
+        "service_worker": "scripts/nch-worker.js"
+    }
+
+}

inch/scripts/nch-worker.js

@@ -0,0 +1,59 @@
+/*
+Noise-cancelling headphones for the internet
+
+(C) 2023 Thinkst Applied Research
+Author: Jacob Torrey
+
+This extension classifies all the text in every <p> on a page using a fast LZMA-based LLM-detector model.
+It sets the opacity of the <p> to the confidence that the <p> is human-written, so LLM-generated content
+fades away.
+*/
+// Import the other background service worker code
+importScripts('lzma_worker-min.js');
+importScripts('nlzmadetect.js');
+
+const CONTEXT_MENU_ID = 'NCH_CONTEXT_MENU';
+function ext_add_to_lp(info, _tab) {
+    if (info.menuItemId != CONTEXT_MENU_ID)
+        return;
+    //console.log("Adding to LP: " + info.selectionText);
+    add_to_lp(info.selectionText);
+    chrome.storage.local.set({lp: local_prelude});
+}
+chrome.contextMenus.removeAll();
+chrome.contextMenus.create({
+    title: "Add text as AI-generated",
+    contexts: ["selection"],
+    id: CONTEXT_MENU_ID
+});
+chrome.contextMenus.onClicked.addListener(ext_add_to_lp)
+
+chrome.storage.local.get(["lp"], function(val) {
+    if ("lp" in val)
+        local_prelude = val.lp;
+});
+
+// How much to boost or decrease the scores
+const skew_factor = 0.9
+
+// Function to analyze text for its origin
+async function query(text) {
+    var score = detect_string(text);
+    if (score == 1)
+        return 1;
+    return score / skew_factor;
+}
+
+// Tracking tabs that are dead to avoid sending responses to.
+var send_errs = 0;
+async function return_results(tab, id, score) {
+    const msg = {id: id, opacity: score};
+    chrome.tabs.sendMessage(tab, msg, {}, function(res) { if (chrome.runtime.lastError) send_errs++; });
+}
+
+function handle_req(msg, sender, _sendResp) {
+    query(msg.content).then((score) => { if (score != 1) return_results(sender.tab.id, msg.id, score) });
+}
+
+chrome.runtime.onMessage.addListener(handle_req);
+

inch/scripts/nch.js

@@ -0,0 +1,41 @@
+/*
+Noise-cancelling headphones for the internet
+
+(C) 2023 Thinkst Applied Research
+Author: Jacob Torrey
+
+This extension classifies all the text in every <p> on a page using a fast LZMA-based LLM-detector model.
+It sets the opacity of the <p> to the confidence that the <p> is human-written, so LLM-generated content
+fades away.
+*/
+
+// Sends content to the web worker in the extension to process the text
+async function send_request(id, text) {
+    const msg = {id: id, content: text};
+    chrome.runtime.sendMessage(msg);
+}
+
+// Given a JSON msg with the ID and opacity, sets the opacity as specified.
+function set_opacity(msg, _sender, _sendResp) {
+    var element = document.getElementById(msg.id);
+    if (element) {
+        //console.log("Setting " + element.id + " to opacity: " + msg.opacity);
+        const opacity = Math.round(msg.opacity * 100) / 100;
+        element.style.transition = "color 1s ease-out";
+        element.style.color = "rgba(0, 0, 0, " + opacity + ")";
+    }
+}
+
+chrome.runtime.onMessage.addListener(set_opacity);
+
+// The types of elements we'll iterate through
+const selector = 'p';
+const tags = document.querySelectorAll(selector);
+tags.forEach(element => {
+    if (element.textContent && element.textContent.length >= 150) {
+        // Make sure there's an id for that element to later set the opacity
+        if (element.id == "")
+            element.id = 'id' + selector + Math.floor(Math.random() * 1000).toString();
+        send_request(element.id, element.textContent);
+    }
+});