Bug fix: On macOS, pasting a clipping doesn't work when browser windo…

…w is full screen

(issue #432)
- Ported from version 6.5

wx-src/background.js

@@ -1738,6 +1738,19 @@ async function pasteClipping(aClippingInfo, aIsExternalRequest, aTabID)
 
 async function pasteProcessedClipping(aClippingContent, aTabID)
 {
+  // Focus the target window and tab to ensure that the clipping is
+  // successfully pasted into the web page.
+  let tab;
+  try {
+    tab = await browser.tabs.get(aTabID);
+  }
+  catch (e) {
+    // Browser tab was closed.
+    warn("Clippings/wx: pasteProcessedClipping(): Can't find browser tab " + aTabID);
+    return;
+  }
+  await browser.windows.update(tab.windowId, {focused: true});
+
   let prefs = await aePrefs.getAllPrefs();
   let msg = {
     msgID: "paste-clipping",
@@ -1751,18 +1764,7 @@ async function pasteProcessedClipping(aClippingContent, aTabID)
   log(`Clippings/wx: Extension sending message "paste-clipping" to content script (active tab ID = ${aTabID})`);
   log(msg);
 
-  // The placeholder prompt or keyboard paste dialog may not be fully closed
-  // when the message is sent to the content script, which can't insert the
-  // clipping if the web page doesn't have focus.
-  // Work around by sending message after a short delay.
-  setTimeout(async () => {
-    try {
-      await browser.tabs.sendMessage(aTabID, msg);
-    }
-    catch (e) {
-      console.error("Clippings/wx: pasteProcessedClipping(): Failed to paste clipping: " + e);
-    }
-  }, 150);
+  await browser.tabs.sendMessage(aTabID, msg);
 }