fix: Fixed restoring folders when session restore is disabled, b=no-bug, c=tabs, folders

src/browser/components/tabbrowser/content/tabs-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tabs.js b/browser/components/tabbrowser/content/tabs.js
-index 1fcebe3962398ff1b7cadef657ac8b68a80e720d..ddb0735916c1cd29f316b2e66a95c765a933362d 100644
+index 1fcebe3962398ff1b7cadef657ac8b68a80e720d..1cd2e9f24b3be1717493b4e663bc41d784cc9da0 100644
 --- a/browser/components/tabbrowser/content/tabs.js
 +++ b/browser/components/tabbrowser/content/tabs.js
 @@ -289,6 +289,7 @@
@@ -435,7 +435,7 @@ index 1fcebe3962398ff1b7cadef657ac8b68a80e720d..ddb0735916c1cd29f316b2e66a95c765
  
        let dropElement = getOverlappedElement();
 +      if (dropElement?.hasAttribute("split-view-group")) dropElement = dropElement.labelElement;
-+      gZenPinnedTabManager.animateSeparatorMove(draggedTab, dropElement, isPinned, event);
++      gZenPinnedTabManager.animateSeparatorMove(movingTabs, dropElement, isPinned, event);
  
        let newDropElementIndex;
        if (dropElement) {

src/zen/folders/zen-folders.css

@@ -17,6 +17,12 @@ tab-group[split-view-group] {
     transparent 40%
   );
 
+  margin-inline-start: var(--zen-folder-indent) !important;
+
+  #tabbrowser-tabs[movingtab] & {
+    transition: margin-inline-start 0.15s ease-in-out;
+  }
+
   & .tab-group-container {
     display: flex;
     flex-wrap: nowrap;
@@ -48,6 +54,7 @@ tab-group[split-view-group] {
       --tab-selected-shadow: none;
       --border-radius-medium: var(--tab-border-radius);
       --zen-active-tab-scale: 1;
+      --zen-folder-indent: 0 !important;
 
       :root[zen-sidebar-expanded='true'] & {
         --tab-min-height: 28px;
@@ -94,7 +101,6 @@ tab-group[split-view-group] {
 
       & > .tabbrowser-tab {
         --tab-hover-background-color: var(--zen-split-view-active-tab-bg);
-        --zen-folder-indent: 0 !important;
         & .tab-background {
           background-color: var(--zen-split-view-active-tab-bg) !important;
         }

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -254,7 +254,15 @@
           }
 
           if (pin.isGroup) {
-            const group = gZenFolders.createFolder([], {
+            const tabs = [];
+            // If there's already existing tabs, let's use them
+            for (const [uuid, existingTab] of pinnedTabsByUUID) {
+              const pinObject = this._pinsCache.find((p) => p.uuid === uuid);
+              if (pinObject && pinObject.parentUuid === pin.uuid) {
+                tabs.push(existingTab);
+              }
+            }
+            const group = gZenFolders.createFolder(tabs, {
               label: pin.title,
               collapsed: pin.isFolderCollapsed,
               initialPinId: pin.uuid,
@@ -981,13 +989,9 @@
       }
       movingTabs = [...movingTabs];
       try {
-        const pinnedTabsTarget =
-          event.target.closest('.zen-workspace-pinned-tabs-section') ||
-          event.target.closest('.zen-current-workspace-indicator') ||
-          this._isGoingToPinnedTabs;
+        const pinnedTabsTarget = this._isGoingToPinnedTabs;
         const essentialTabsTarget = event.target.closest('.zen-essentials-container');
-        const tabsTarget =
-          event.target.closest('.zen-workspace-normal-tabs-section') || !this._isGoingToPinnedTabs;
+        const tabsTarget = !this._isGoingToPinnedTabs;
 
         // TODO: Solve the issue of adding a tab between two groups
         // Remove group labels from the moving tabs and replace it
@@ -1158,7 +1162,8 @@
             continue;
           }
         }
-        item.style.removeProperty('--zen-folder-indent');
+        const itemToAnimate = item.group?.hasAttribute('split-view-group') ? item.group : item;
+        itemToAnimate.style.removeProperty('--zen-folder-indent');
       }
       this.removeTabContainersDragoverClass();
     }
@@ -1173,7 +1178,8 @@
         : [separator];
     }
 
-    animateSeparatorMove(draggedTab, dropElement, isPinned, event) {
+    animateSeparatorMove(movingTabs, dropElement, isPinned, event) {
+      let draggedTab = movingTabs[0];
       if (gBrowser.isTabGroupLabel(draggedTab) && draggedTab.group.isZenFolder) {
         return;
       }
@@ -1182,7 +1188,9 @@
       }
       const itemsToCheck = this.dragShiftableItems;
       const translate = event.screenY;
-      const draggingTabHeight = window.windowUtils.getBoundsWithoutFlushing(draggedTab).height;
+      const draggingTabHeight = movingTabs.reduce((acc, item) => {
+        return acc + window.windowUtils.getBoundsWithoutFlushing(item).height;
+      }, 0);
       let topToNormalTabs = itemsToCheck[0].screenY;
       if (!isPinned) {
         topToNormalTabs += draggedTab.getBoundingClientRect().height;