Bug 1941189 - Make vertical pinned tabs container adjustable r=desktop-theme-reviewers,tabbrowser-reviewers,sidebar-reviewers,jsudiaman,nsharpley,sfoster

Differential Revision: https://phabricator.services.mozilla.com/D246484

browser/base/content/navigator-toolbox.inc.xhtml

@@ -57,7 +57,7 @@
 # DisplayPortUtils::MaybeCreateDisplayPortInFirstScrollFrameEncountered based
 # the current structure that we may want to revisit.
           <arrowscrollbox id="vertical-pinned-tabs-container" orient="vertical" tabindex="-1"></arrowscrollbox>
-          <html:div id="vertical-pinned-tabs-container-separator"></html:div>
+          <splitter orient="vertical" id="vertical-pinned-tabs-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
           <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="horizontal" flex="1" clicktoscroll="" scrolledtostart="" scrolledtoend="">
             <tab is="tabbrowser-tab" class="tabbrowser-tab" selected="true" visuallyselected="" fadein=""/>
             <hbox id="tabbrowser-arrowscrollbox-periphery">

browser/components/sidebar/SidebarState.sys.mjs

@@ -32,11 +32,20 @@ XPCOMUtils.defineLazyPreferenceGetter(
  *   When sidebar.visibility pref value is "always-show", the toolbar button serves to toggle this property
  * @property {boolean} launcherDragActive
  *   Whether the launcher is currently being dragged.
+ * @property {boolean} pinnedTabsDragActive
+ *   Whether the pinned tabs container is currently being dragged.
  * @property {boolean} launcherHoverActive
  *   Whether the launcher is currently being hovered.
  * @property {number} launcherWidth
  *   Current width of the sidebar launcher.
  * @property {number} expandedLauncherWidth
+ *   Width of the expanded launcher
+ * @property {number} pinnedTabsHeight
+ *   Current height of the pinned tabs container
+ * @property {number} expandedPinnedTabsHeight
+ *   Height of the pinned tabs container when the sidebar is expanded
+ * @property {number} collapsedPinnedTabsHeight
+ *   Height of the pinned tabs container when the sidebar is collapsed
  */
 
 const LAUNCHER_MINIMUM_WIDTH = 100;
@@ -66,6 +75,7 @@ export class SidebarState {
     launcherHoverActive: false,
     launcherVisible: false,
     panelOpen: false,
+    pinnedTabsDragActive: false,
   });
 
   /**
@@ -122,6 +132,26 @@ export class SidebarState {
     return this.#controller._box;
   }
 
+  /**
+   * Get the pinned tabs container element.
+   *
+   * @returns {XULElement}
+   */
+  get #pinnedTabsContainerEl() {
+    return this.#controller._pinnedTabsContainer;
+  }
+
+  /**
+   * Get the items-wrapper part of the pinned tabs container element.
+   *
+   * @returns {XULElement}
+   */
+  get #pinnedTabsItemsWrapper() {
+    return this.#pinnedTabsContainerEl.shadowRoot.querySelector(
+      "[part=items-wrapper]"
+    );
+  }
+
   /**
    * Get window object from the controller.
    */
@@ -193,6 +223,10 @@ export class SidebarState {
         case "panelOpen":
           // we need to know if we have a command value before finalizing panelOpen
           break;
+        case "expandedPinnedTabsHeight":
+        case "collapsedPinnedTabsHeight":
+          this.#updatePinnedTabsHeight();
+          break;
         default:
           this[key] = value;
       }
@@ -240,6 +274,9 @@ export class SidebarState {
       expandedLauncherWidth: convertToInt(this.expandedLauncherWidth),
       launcherExpanded: this.launcherExpanded,
       launcherVisible: this.launcherVisible,
+      pinnedTabsHeight: this.pinnedTabsHeight,
+      expandedPinnedTabsHeight: this.expandedPinnedTabsHeight,
+      collapsedPinnedTabsHeight: this.collapsedPinnedTabsHeight,
     };
     // omit any properties with undefined values'
     for (let [key, value] of Object.entries(props)) {
@@ -290,6 +327,24 @@ export class SidebarState {
     this.#launcherContainerEl.style.maxWidth = `calc(${SIDEBAR_MAXIMUM_WIDTH} - ${width}px)`;
   }
 
+  get expandedPinnedTabsHeight() {
+    return this.#props.expandedPinnedTabsHeight;
+  }
+
+  set expandedPinnedTabsHeight(height) {
+    this.#props.expandedPinnedTabsHeight = height;
+    this.#updatePinnedTabsHeight();
+  }
+
+  get collapsedPinnedTabsHeight() {
+    return this.#props.collapsedPinnedTabsHeight;
+  }
+
+  set collapsedPinnedTabsHeight(height) {
+    this.#props.collapsedPinnedTabsHeight = height;
+    this.#updatePinnedTabsHeight();
+  }
+
   get defaultLauncherVisible() {
     if (!this.revampEnabled) {
       return false;
@@ -390,6 +445,12 @@ export class SidebarState {
     if (!this.launcherDragActive) {
       this.#updateLauncherWidth();
     }
+    if (
+      !this.pinnedTabsDragActive &&
+      this.#controller.sidebarRevampVisibility !== "expand-on-hover"
+    ) {
+      this.#updatePinnedTabsHeight();
+    }
   }
 
   get launcherDragActive() {
@@ -429,6 +490,34 @@ export class SidebarState {
     rootEl.toggleAttribute("sidebar-launcher-drag-active", active);
   }
 
+  get pinnedTabsDragActive() {
+    return this.#props.pinnedTabsDragActive;
+  }
+
+  set pinnedTabsDragActive(active) {
+    this.#props.pinnedDragActive = active;
+
+    let itemsWrapperHeight =
+      this.#controllerGlobal.windowUtils.getBoundsWithoutFlushing(
+        this.#pinnedTabsItemsWrapper
+      ).height;
+    if (this.pinnedTabsHeight > itemsWrapperHeight) {
+      this.pinnedTabsHeight = itemsWrapperHeight;
+      if (this.#props.launcherExpanded) {
+        this.expandedPinnedTabsHeight = this.pinnedTabsHeight;
+      } else {
+        this.collapsedPinnedTabsHeight = this.pinnedTabsHeight;
+      }
+    } else if (!active) {
+      // Store the user-preferred pinned tabs height.
+      if (this.#props.launcherExpanded) {
+        this.expandedPinnedTabsHeight = this.pinnedTabsHeight;
+      } else {
+        this.collapsedPinnedTabsHeight = this.pinnedTabsHeight;
+      }
+    }
+  }
+
   get launcherHoverActive() {
     return this.#props.launcherHoverActive;
   }
@@ -478,6 +567,31 @@ export class SidebarState {
     );
   }
 
+  get pinnedTabsHeight() {
+    return this.#props.pinnedTabsHeight;
+  }
+
+  set pinnedTabsHeight(height) {
+    this.#props.pinnedTabsHeight = height;
+    if (this.launcherExpanded) {
+      this.expandedPinnedTabsHeight = height;
+    } else {
+      this.collapsedPinnedTabsHeight = height;
+    }
+  }
+
+  /**
+   * When the sidebar is expanded/collapsed, resize the pinned tabs container to the user-preferred
+   * height (if available).
+   */
+  #updatePinnedTabsHeight() {
+    if (this.launcherExpanded && this.expandedPinnedTabsHeight) {
+      this.#pinnedTabsContainerEl.style.height = `${this.expandedPinnedTabsHeight}px`;
+    } else if (!this.launcherExpanded && this.collapsedPinnedTabsHeight) {
+      this.#pinnedTabsContainerEl.style.height = `${this.collapsedPinnedTabsHeight}px`;
+    }
+  }
+
   #updateTabbrowser(isSidebarShown) {
     this.#controllerGlobal.document
       .getElementById("tabbrowser-tabbox")

browser/components/sidebar/browser-sidebar.js

@@ -252,6 +252,8 @@ var SidebarController = {
   lastOpenedId: null,
 
   _box: null,
+  _pinnedTabsContainer: null,
+  _pinnedTabsItemsWrapper: null,
   // The constructor of this label accesses the browser element due to the
   // control="sidebar" attribute, so avoid getting this label during startup.
   get _title() {
@@ -334,6 +336,10 @@ var SidebarController = {
     return this._launcherSplitter.getAttribute("state") === "dragging";
   },
 
+  get isPinnedTabsDragging() {
+    return this._pinnedTabsSplitter.getAttribute("state") === "dragging";
+  },
+
   init() {
     // Initialize global state manager.
     this.SidebarManager;
@@ -343,11 +349,21 @@ var SidebarController = {
       this._state = new this.SidebarState(this);
     }
 
+    this._pinnedTabsContainer = document.getElementById(
+      "vertical-pinned-tabs-container"
+    );
+    this._pinnedTabsItemsWrapper =
+      this._pinnedTabsContainer.shadowRoot.querySelector(
+        "[part=items-wrapper]"
+      );
     this._box = document.getElementById("sidebar-box");
     this._splitter = document.getElementById("sidebar-splitter");
     this._launcherSplitter = document.getElementById(
       "sidebar-launcher-splitter"
     );
+    this._pinnedTabsSplitter = document.getElementById(
+      "vertical-pinned-tabs-splitter"
+    );
     this._reversePositionButton = document.getElementById(
       "sidebar-reverse-position"
     );
@@ -416,6 +432,7 @@ var SidebarController = {
         this._splitter.addEventListener("command", this._browserResizeObserver);
       }
       this._enableLauncherDragging();
+      this._enablePinnedTabsSplitterDragging();
 
       // Record Glean metrics.
       this.recordVisibilitySetting();
@@ -436,6 +453,7 @@ var SidebarController = {
         this._switcherListenersAdded = true;
       }
       this._disableLauncherDragging();
+      this._disablePinnedTabsDragging();
     }
     // We need to update the tab strip for vertical tabs during init
     // as there will be no tabstrip-orientation-change event
@@ -514,6 +532,7 @@ var SidebarController = {
     }
     this._splitter.removeEventListener("command", this._browserResizeObserver);
     this._disableLauncherDragging();
+    this._disablePinnedTabsDragging();
   },
 
   /**
@@ -1313,6 +1332,66 @@ var SidebarController = {
     this._launcherSplitter.hidden = false;
   },
 
+  /**
+   * Enable the splitter which can be used to resize the pinned tabs container.
+   */
+  _enablePinnedTabsSplitterDragging() {
+    if (!this._pinnedTabsSplitter.hidden) {
+      // Already showing the launcher splitter with observers connected.
+      // Nothing to do.
+      return;
+    }
+    this._pinnedTabsResizeObserver = new ResizeObserver(([entry]) => {
+      if (this.isPinnedTabsDragging) {
+        this._state.pinnedTabsDragActive = true;
+      }
+      if (
+        (entry.contentBoxSize[0].blockSize ===
+          this._state.expandedPinnedTabsHeight &&
+          this._state.launcherExpanded) ||
+        (entry.contentBoxSize[0].blockSize ===
+          this._state.collapsedPinnedTabsHeight &&
+          !this._state.launcherExpanded)
+      ) {
+        // condition already met, no need to re-update
+        return;
+      }
+      this._state.pinnedTabsHeight = entry.contentBoxSize[0].blockSize;
+    });
+
+    this._itemsWrapperResizeObserver = new ResizeObserver(async () => {
+      await window.promiseDocumentFlushed(() => {
+        // Adjust pinned tabs container height if needed
+        let itemsWrapperHeight = window.windowUtils.getBoundsWithoutFlushing(
+          this._pinnedTabsItemsWrapper
+        ).height;
+        requestAnimationFrame(() => {
+          if (this._state.pinnedTabsHeight > itemsWrapperHeight) {
+            this._state.pinnedTabsHeight = itemsWrapperHeight;
+            if (this._state.launcherExpanded) {
+              this._state.expandedPinnedTabsHeight =
+                this._state.pinnedTabsHeight;
+            } else {
+              this._state.collapsedPinnedTabsHeight =
+                this._state.pinnedTabsHeight;
+            }
+          }
+        });
+      });
+    });
+    this._pinnedTabsResizeObserver.observe(this._pinnedTabsContainer);
+    this._itemsWrapperResizeObserver.observe(this._pinnedTabsItemsWrapper);
+
+    this._pinnedTabsDropHandler = () =>
+      (this._state.pinnedTabsDragActive = false);
+    this._pinnedTabsSplitter.addEventListener(
+      "command",
+      this._pinnedTabsDropHandler
+    );
+
+    this._pinnedTabsSplitter.hidden = false;
+  },
+
   /**
    * Disable the launcher splitter and remove any active observers.
    */
@@ -1328,6 +1407,20 @@ var SidebarController = {
     this._launcherSplitter.hidden = true;
   },
 
+  /**
+   * Disable the pinned tabs splitter and remove any active observers.
+   */
+  _disablePinnedTabsDragging() {
+    if (this._pinnedTabsResizeObserver) {
+      this._pinnedTabsResizeObserver.disconnect();
+    }
+    if (this._itemsWrapperResizeObserver) {
+      this._itemsWrapperResizeObserver.disconnect();
+    }
+
+    this._pinnedTabsSplitter.hidden = true;
+  },
+
   _loadSidebarExtension(commandID) {
     let sidebar = this.sidebars.get(commandID);
     if (typeof sidebar?.onload === "function") {
@@ -2020,6 +2113,11 @@ var SidebarController = {
         this.mouseOverTask?.finalize();
       }
     }
+
+    document.documentElement.toggleAttribute(
+      "sidebar-expand-on-hover",
+      isEnabled
+    );
   },
 
   /**
@@ -2183,6 +2281,11 @@ XPCOMUtils.defineLazyPreferenceGetter(
       !SidebarController.inSingleTabWindow
     ) {
       SidebarController.recordTabsLayoutSetting(newValue);
+      if (newValue) {
+        SidebarController._enablePinnedTabsSplitterDragging();
+      } else {
+        SidebarController._disablePinnedTabsDragging();
+      }
     }
   }
 );

browser/components/sidebar/tests/browser/browser_resize_sidebar.js

@@ -31,7 +31,7 @@ async function dragLauncher(deltaX, shouldExpand) {
   info(`Drag the launcher by ${deltaX} px.`);
   const { sidebarMain, _launcherSplitter: splitter } = SidebarController;
   EventUtils.synthesizeMouseAtCenter(splitter, { type: "mousedown" });
-  await mouseMoveInChunks(splitter, deltaX, 10);
+  await mouseMoveInChunksHorizontal(splitter, deltaX, 10);
   EventUtils.synthesizeMouse(splitter, 0, 0, { type: "mouseup" });
 
   info(`The sidebar should be ${shouldExpand ? "expanded" : "collapsed"}.`);
@@ -44,7 +44,24 @@ async function dragLauncher(deltaX, shouldExpand) {
   AccessibilityUtils.resetEnv();
 }
 
-async function mouseMoveInChunks(el, deltaX, numberOfChunks) {
+async function dragPinnedTabs(deltaY) {
+  AccessibilityUtils.setEnv({ mustHaveAccessibleRule: false });
+
+  // Let the pinned tabs splitter stabilize before attempting a drag-and-drop.
+  await waitForRepaint();
+
+  info(`Drag the launcher by ${deltaY} px.`);
+  const { _pinnedTabsSplitter: splitter } = SidebarController;
+  EventUtils.synthesizeMouseAtCenter(splitter, { type: "mousedown" });
+  await mouseMoveInChunksVertical(splitter, deltaY, 10);
+  EventUtils.synthesizeMouse(splitter, 0, 0, { type: "mouseup" });
+
+  info(`The pinned tabs container has been expanded.`);
+
+  AccessibilityUtils.resetEnv();
+}
+
+async function mouseMoveInChunksHorizontal(el, deltaX, numberOfChunks) {
   let chunkIndex = 0;
   const chunkSize = deltaX / numberOfChunks;
   const finished = Promise.withResolvers();
@@ -64,10 +81,35 @@ async function mouseMoveInChunks(el, deltaX, numberOfChunks) {
   await finished.promise;
 }
 
+async function mouseMoveInChunksVertical(el, deltaY, numberOfChunks) {
+  let chunkIndex = 0;
+  const chunkSize = deltaY / numberOfChunks;
+  const finished = Promise.withResolvers();
+
+  function synthesizeMouseMove() {
+    info(`chunkSize: ${chunkSize}`);
+    // mousemove by a single chunk. Queue up the next chunk if necessary.
+    EventUtils.synthesizeMouse(el, 0, chunkSize, { type: "mousemove" });
+    if (++chunkIndex === numberOfChunks) {
+      finished.resolve();
+    } else {
+      requestAnimationFrame(synthesizeMouseMove);
+    }
+  }
+
+  await waitForRepaint();
+  requestAnimationFrame(synthesizeMouseMove);
+  await finished.promise;
+}
+
 function getLauncherWidth({ SidebarController } = window) {
   return SidebarController.sidebarContainer.style.width;
 }
 
+function getPinnedTabsHeight({ SidebarController } = window) {
+  return SidebarController._pinnedTabsContainer.clientHeight;
+}
+
 add_task(async function test_drag_expand_and_collapse() {
   await dragLauncher(200, true);
   ok(getLauncherWidth(), "Launcher width set.");
@@ -159,4 +201,38 @@ add_task(async function test_resize_after_toggling_revamp() {
     parseInt(originalWidth),
     "Vertical tab strip was resized."
   );
+
+  await dragLauncher(-200, true);
+});
+
+add_task(async function test_resize_of_pinned_tabs() {
+  await SidebarController.initializeUIState({
+    launcherExpanded: true,
+  });
+
+  info("Open 10 new tabs using the new tab button.");
+  for (let i = 0; i < 10; i++) {
+    await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      `data:text/html,<title>${i + 1}</title>`
+    );
+    gBrowser.pinTab(gBrowser.selectedTab);
+  }
+  await SidebarController.waitUntilStable();
+
+  info("Resize the pinned tabs container.");
+  const originalHeight = getPinnedTabsHeight();
+  await dragPinnedTabs(200, true);
+  await SidebarController.waitUntilStable();
+  const newHeight = getPinnedTabsHeight();
+  info(`original: ${originalHeight}, new: ${newHeight}`);
+  Assert.greater(
+    parseInt(newHeight),
+    parseInt(originalHeight),
+    "Pinned tabs container was resized."
+  );
+
+  while (gBrowser.tabs.length > 1) {
+    BrowserTestUtils.removeTab(gBrowser.tabs.at(-1));
+  }
 });

browser/components/sidebar/tests/browser/browser_sidebar_expand_on_hover.js

@@ -201,9 +201,10 @@ add_task(async function test_expand_on_hover_pinned_tabs() {
       SidebarController.sidebarMain.hasAttribute("expanded"),
     "The launcher is expanded"
   );
-  is(
+  Assert.less(
-    Math.round(parseInt(verticalTabsComputedStyle.width)),
+    Math.round(parseInt(verticalTabsComputedStyle.width)) %
-    Math.round(parseInt(pinnedTabComputedStyle.width)),
+      Math.round(parseInt(pinnedTabComputedStyle.width)),
+    10,
     "The pinned tabs are full width when expanded"
   );
 

browser/themes/shared/tabbrowser/tabs.css

@@ -105,6 +105,8 @@
   --tab-group-color-gray-pale: #F2F9FF;
 
   --tab-group-label-text-dark: var(--color-gray-100);
+  /* 5px of padding-block are adding to .tabbrowser-tab */
+  --tab-height-with-margin-padding: calc(5px + var(--tab-min-height) + (2 * var(--tab-block-margin)));
 }
 
 /* stylelint-disable-next-line media-query-no-invalid */
@@ -1351,7 +1353,8 @@ tab-group {
 /* Vertical tabs styling */
 
 #tabbrowser-arrowscrollbox[orient="vertical"] {
-  min-height: 1px;
+  /* Don't allow resizing below the height of 3 tabs */
+  min-height: calc(3 * var(--tab-height-with-margin-padding));
 
   &::part(scrollbutton-up),
   &::part(scrollbutton-down) {
@@ -1424,8 +1427,8 @@ tab-group {
 }
 
 #vertical-pinned-tabs-container {
-  /* Fit slightly more than 5 tabs + padding before overflowing */
+  /* Don't allow resizing below the height of 1 row of pinned tabs */
-  max-height: calc(5 * var(--tabstrip-min-height) + var(--space-large));
+  min-height: var(--tab-height-with-margin-padding);
 
   &:empty {
     display: none;
@@ -1473,6 +1476,10 @@ tab-group {
     }
   }
 
+  &::part(items-wrapper) {
+    flex: 0 1 0;
+  }
+
   :root:not([sidebar-expand-on-hover]) & {
     --tab-inline-padding: calc((var(--tab-collapsed-background-width) + 2 *
       var(--tab-pinned-margin-inline-expanded) - var(--icon-size-default)) / 2);
@@ -1488,6 +1495,7 @@ tab-group {
           minmax(var(--tab-pinned-min-width-expanded), auto)
         );
         display: grid;
+        grid-auto-rows: var(--tab-height-with-margin-padding);
       }
 
       .tab-label-container {
@@ -1524,23 +1532,29 @@ tab-group {
   }
 }
 
-#vertical-pinned-tabs-container-separator {
+#vertical-pinned-tabs-splitter {
   display: block;
-  border-bottom: var(--tabstrip-inner-border);
+  border-top: var(--tabstrip-inner-border);
   margin-inline: var(--tab-inner-inline-margin);
+  min-height: 2px;
 
   #vertical-pinned-tabs-container:empty + & {
     display: none;
   }
 
+  &:hover {
+    background-color: var(--focus-outline-color);
+    border-radius: var(--border-radius-medium);
+  }
+
   /* stylelint-disable-next-line media-query-no-invalid */
   @media not -moz-pref("sidebar.visibility", "expand-on-hover") {
-  /* We need these rules to apply at all times when the sidebar.visibility
+    /* We need these rules to apply at all times when the sidebar.visibility
-  pref is not set to "expand-on-hover" as opposed to when the "sidebar-expand-on-hover" attribute
+    pref is not set to "expand-on-hover" as opposed to when the "sidebar-expand-on-hover" attribute
-  has not been added to root. There are certain scenarios when that attribute is temporarily
+    has not been added to root. There are certain scenarios when that attribute is temporarily
-  removed from root such as when toggling the sidebar to expand with the toolbar button. */
+    removed from root such as when toggling the sidebar to expand with the toolbar button. */
     #tabbrowser-tabs[expanded] > & {
-      display: none;
+      border: none;
     }
   }
 }