Enhance ZenGlanceManager to conditionally open tabs based on domain differences and refactor tab open handling

Author: mauro-balades

src/browser/base/content/browser-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
-index ccd83c15d0d73a1e53bdbfdfbe6fed43a26c961d..f18a6abf7debb97539a4cdf8422315b4dff08adb 100644
+index 9a65dcc7ad41ab961907c95338e023b173d4f474..9477e0c115ed3c4a670f1ac63846b6de01bf8b8c 100644
 --- a/browser/base/content/browser.js
 +++ b/browser/base/content/browser.js
 @@ -32,6 +32,7 @@ ChromeUtils.defineESModuleGetters(this, {
@@ -10,7 +10,7 @@ index ccd83c15d0d73a1e53bdbfdfbe6fed43a26c961d..f18a6abf7debb97539a4cdf8422315b4
    DevToolsSocketStatus:
      "resource://devtools/shared/security/DevToolsSocketStatus.sys.mjs",
    DownloadUtils: "resource://gre/modules/DownloadUtils.sys.mjs",
-@@ -632,6 +633,15 @@ XPCOMUtils.defineLazyPreferenceGetter(
+@@ -630,6 +631,15 @@ XPCOMUtils.defineLazyPreferenceGetter(
    false
  );
 
@@ -26,7 +26,7 @@ index ccd83c15d0d73a1e53bdbfdfbe6fed43a26c961d..f18a6abf7debb97539a4cdf8422315b4
  customElements.setElementCreationCallback("screenshots-buttons", () => {
    Services.scriptloader.loadSubScript(
      "chrome://browser/content/screenshots/screenshots-buttons.js",
-@@ -3438,6 +3448,11 @@ var XULBrowserWindow = {
+@@ -3440,6 +3450,11 @@ var XULBrowserWindow = {
      AboutReaderParent.updateReaderButton(gBrowser.selectedBrowser);
      TranslationsParent.onLocationChange(gBrowser.selectedBrowser);
 
@@ -38,7 +38,27 @@ index ccd83c15d0d73a1e53bdbfdfbe6fed43a26c961d..f18a6abf7debb97539a4cdf8422315b4
      PictureInPicture.updateUrlbarToggle(gBrowser.selectedBrowser);
 
      if (!gMultiProcessBrowser) {
-@@ -7289,6 +7304,12 @@ var gDialogBox = {
+@@ -4435,7 +4450,7 @@ nsBrowserAccess.prototype = {
+     // Passing a null-URI to only create the content window,
+     // and pass true for aSkipLoad to prevent loading of
+     // about:blank
+-    return this.getContentWindowOrOpenURIInFrame(
++    let res = this.getContentWindowOrOpenURIInFrame(
+       null,
+       aParams,
+       aWhere,
+@@ -4443,6 +4458,10 @@ nsBrowserAccess.prototype = {
+       aName,
+       true
+     );
++    if (typeof window.gZenGlanceManager !== "undefined" && window.toolbar.visible) {
++      window.gZenGlanceManager.onTabOpen(res, aURI);
++    }
++    return res;
+   },
+ 
+   openURIInFrame: function browser_openURIInFrame(
+@@ -7281,6 +7300,12 @@ var gDialogBox = {
      parentElement.showModal();
      this._didOpenHTMLDialog = true;
 

src/browser/base/zen-components/ZenGlanceManager.mjs

@@ -9,7 +9,6 @@
     init() {
       window.addEventListener('keydown', this.onKeyDown.bind(this));
       window.addEventListener('TabClose', this.onTabClose.bind(this));
-      window.addEventListener('TabOpen', this.onTabOpen.bind(this));
 
       XPCOMUtils.defineLazyPreferenceGetter(
         this._lazyPref,
@@ -77,7 +76,7 @@
       return this.#currentBrowser;
     }
 
-    openGlance(data, existingTab = null) {
+    openGlance(data, existingTab = null, ownerTab = null) {
       if (this.#currentBrowser) {
         return;
       }
@@ -94,7 +93,7 @@
       this.browserWrapper?.removeAttribute('has-finished-animation');
       this.overlay?.removeAttribute('post-fade-out');
 
-      const currentTab = gBrowser.selectedTab;
+      const currentTab = ownerTab ?? gBrowser.selectedTab;
 
       this.animatingOpen = true;
       this._animating = true;
@@ -308,21 +307,37 @@
       }
     }
 
-    shouldOpenTabInGlance(tab) {
+    tabDomainsDiffer(tab1, url2) {
+      try {
+        if (!tab1) {
+          return true;
+        }
+        let url1 = tab1.linkedBrowser.currentURI.spec;
+        if (url1.startsWith('about:')) {
+          return true;
+        }
+        return Services.io.newURI(url1).host !== url2.host;
+      } catch (e) {
+        return true;
+      }
+    }
+
+    shouldOpenTabInGlance(tab, uri) {
       let owner = tab.owner;
       return (
         owner &&
         owner.getAttribute('zen-essential') === 'true' &&
         this._lazyPref.SHOULD_OPEN_EXTERNAL_TABS_IN_GLANCE &&
         owner.linkedBrowser?.docShellIsActive &&
-        owner.linkedBrowser?.browsingContext?.isAppTab
+        owner.linkedBrowser?.browsingContext?.isAppTab &&
+        this.tabDomainsDiffer(owner, uri)
       );
     }
 
-    onTabOpen(event) {
-      let tab = event.target;
-      if (this.shouldOpenTabInGlance(tab)) {
-        this.openGlance({ url: undefined, x: 0, y: 0, width: 0, height: 0 }, tab);
+    onTabOpen(browser, uri) {
+      let tab = gBrowser.getTabForBrowser(browser);
+      if (this.shouldOpenTabInGlance(tab, uri)) {
+        this.openGlance({ url: undefined, x: 0, y: 0, width: 0, height: 0 }, tab, tab.owner);
       }
     }