From 7b1511a243aa322462d29d15f19f9c2a8bfc67ef Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Sat, 19 Nov 2016 23:03:58 +0100
Subject: [PATCH] circumvent chrome bug for JS-less wallet detection

---
 src/content_scripts/notify.js |  3 +++
 src/content_scripts/notify.ts |  5 +++++
 src/wxBackend.ts              | 27 +++++++++++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/src/content_scripts/notify.js b/src/content_scripts/notify.js
index 43ded3d95..449697061 100644
--- a/src/content_scripts/notify.js
+++ b/src/content_scripts/notify.js
@@ -43,6 +43,9 @@ var TalerNotify;
         console.error("Taler wallet lib not included, HTTP 402 payments not" +
             " supported");
     }
+    if (document.documentElement.getAttribute("data-taler-nojs")) {
+        document.dispatchEvent(new Event("taler-probe-result"));
+    }
     function subst(url, H_contract) {
         url = url.replace("${H_contract}", H_contract);
         url = url.replace("${$}", "$");
diff --git a/src/content_scripts/notify.ts b/src/content_scripts/notify.ts
index 6fb4eae47..022eada07 100644
--- a/src/content_scripts/notify.ts
+++ b/src/content_scripts/notify.ts
@@ -43,6 +43,11 @@ namespace TalerNotify {
                   " supported");
   }
 
+  if (document.documentElement.getAttribute("data-taler-nojs")) {
+    document.dispatchEvent(new Event("taler-probe-result"));
+  }
+
+
   function subst(url: string, H_contract: string) {
     url = url.replace("${H_contract}", H_contract);
     url = url.replace("${$}", "$");
diff --git a/src/wxBackend.ts b/src/wxBackend.ts
index 6e637a2a6..e8f10cf5c 100644
--- a/src/wxBackend.ts
+++ b/src/wxBackend.ts
@@ -453,10 +453,37 @@ export function wxMain() {
         chrome.tabs.executeScript(tab.id, { file: "/src/vendor/URI.js" });
         chrome.tabs.executeScript(tab.id, { file: "/src/taler-wallet-lib.js" });
         chrome.tabs.executeScript(tab.id, { file: "/src/content_scripts/notify.js" });
+        let code = `
+          if (document.documentElement.getAttribute("data-taler-nojs")) {
+            document.dispatchEvent(new Event("taler-probe-result"));
+          }
+        `;
+        chrome.tabs.executeScript(tab.id, { code, runAt: "document_idle" });
       }
     }
   });
 
+  chrome.tabs.onUpdated.addListener((tabId, changeInfo) => {
+    if (changeInfo.status != 'complete') {
+      return;
+    }
+    chrome.tabs.get(tabId, (tab) => {
+      if (!tab.url || !tab.id) {
+        return;
+      }
+      let code = `
+        if (document.documentElement.getAttribute("data-taler-nojs")) {
+          document.dispatchEvent(new Event("taler-probe-result"));
+        }
+      `;
+      let run = () => {
+        chrome.tabs.executeScript(tab.id!, { code, runAt: "document_idle" });
+      };
+      chrome.extension.getBackgroundPage().setTimeout(run, 300);
+    });
+
+  });
+
   chrome.extension.getBackgroundPage().setInterval(clearRateLimitCache, 5000);
 
   Promise.resolve()