Adds matchAnchorWidth to FloatingUI components

web/app/components/floating-u-i/content.ts

@@ -13,6 +13,13 @@ import {
 import Component from "@glimmer/component";
 import { tracked } from "@glimmer/tracking";
 
+export type MatchAnchorWidthOptions =
+  | boolean
+  | {
+      enabled: boolean;
+      additionalWidth: number;
+    };
+
 interface FloatingUIContentSignature {
   Element: HTMLDivElement;
   Args: {
@@ -22,6 +29,7 @@ interface FloatingUIContentSignature {
     placement?: Placement | null;
     renderOut?: boolean;
     offset?: OffsetOptions;
+    matchAnchorWidth?: MatchAnchorWidthOptions;
   };
   Blocks: {
     default: [];
@@ -42,31 +50,56 @@ export default class FloatingUIContent extends Component<FloatingUIContentSignat
   @action didInsert(e: HTMLElement) {
     this._content = e;
 
-    if (this.args.placement === null) {
-      this.content.removeAttribute("data-floating-ui-placement");
-      this.content.classList.add("non-floating-content");
+    const { matchAnchorWidth, anchor, placement } = this.args;
+    const { content } = this;
+
+    this.maybeMatchAnchorWidth();
+
+    if (placement === null) {
+      content.removeAttribute("data-floating-ui-placement");
+      content.classList.add("non-floating-content");
       this.cleanup = () => {};
       return;
     }
 
     let updatePosition = async () => {
-      let placement = this.args.placement || "bottom-start";
+      let _placement = placement || "bottom-start";
 
-      computePosition(this.args.anchor, this.content, {
+      computePosition(anchor, content, {
         platform,
-        placement: placement as Placement,
+        placement: _placement as Placement,
         middleware: [offset(this.offset), flip(), shift()],
       }).then(({ x, y, placement }) => {
-        this.content.setAttribute("data-floating-ui-placement", placement);
+        this.maybeMatchAnchorWidth();
+        content.setAttribute("data-floating-ui-placement", placement);
 
-        Object.assign(this.content.style, {
+        Object.assign(content.style, {
           left: `${x}px`,
           top: `${y}px`,
         });
       });
     };
 
-    this.cleanup = autoUpdate(this.args.anchor, this.content, updatePosition);
+    this.cleanup = autoUpdate(anchor, content, updatePosition);
+  }
+
+  private maybeMatchAnchorWidth() {
+    const { matchAnchorWidth, anchor } = this.args;
+    const { content } = this;
+
+    if (!matchAnchorWidth) {
+      return;
+    }
+
+    if (typeof matchAnchorWidth === "boolean") {
+      content.style.width = `${anchor.offsetWidth}px`;
+    } else {
+      content.style.width = `${
+        anchor.offsetWidth + matchAnchorWidth.additionalWidth
+      }px`;
+    }
+
+    content.style.maxWidth = "none";
   }
 }
 

web/app/components/floating-u-i/index.hbs

@@ -17,6 +17,7 @@
     @renderOut={{@renderOut}}
     @anchor={{this.anchor}}
     @id={{this.contentID}}
+    @matchAnchorWidth={{@matchAnchorWidth}}
     ...attributes
   >
     {{yield

web/app/components/floating-u-i/index.ts

@@ -4,6 +4,7 @@ import { guidFor } from "@ember/object/internals";
 import { OffsetOptions, Placement } from "@floating-ui/dom";
 import Component from "@glimmer/component";
 import { tracked } from "@glimmer/tracking";
+import { MatchAnchorWidthOptions } from "./content";
 
 interface FloatingUIAnchorAPI {
   contentIsShown: boolean;
@@ -28,6 +29,7 @@ interface FloatingUIComponentSignature {
     placement?: Placement | null;
     disableClose?: boolean;
     offset?: OffsetOptions;
+    matchAnchorWidth?: MatchAnchorWidthOptions;
   };
   Blocks: {
     anchor: [dd: FloatingUIAnchorAPI];

web/app/components/header/search.hbs

@@ -1,11 +1,12 @@
 {{on-document "keydown" this.maybeFocusInput}}
 
 <div ...attributes>
-  <form class="w-full relative" {{on "submit" this.viewAllResults}}>
+  <form class="relative w-full" {{on "submit" this.viewAllResults}}>
     <X::DropdownList
       @items={{this.itemsToShow}}
-      @offset={{hash mainAxis=0 crossAxis=3}}
+      @offset={{hash mainAxis=0 crossAxis=2}}
       @placement="bottom-end"
+      @matchAnchorWidth={{hash enabled=true additionalWidth=4}}
       class="search-popover
         {{unless this.bestMatchesHeaderIsShown 'no-best-matches'}}"
     >

web/app/components/x/dropdown-list/index.hbs

@@ -10,6 +10,7 @@
   @placement={{@placement}}
   @offset={{@offset}}
   @disableClose={{@disableClose}}
+  @matchAnchorWidth={{@matchAnchorWidth}}
   class="{{unless (eq @placement null) 'hermes-popover'}} x-dropdown-list"
   data-test-x-dropdown-list-content
   {{will-destroy this.onDestroy}}
@@ -95,7 +96,7 @@
       {{else}}
         <div
           data-test-x-dropdown-list-loaded-content
-          class="overflow-hidden flex flex-col"
+          class="flex flex-col overflow-hidden"
           {{did-insert this.didInsertContent}}
         >
           {{#if this.inputIsShown}}

web/app/components/x/dropdown-list/index.ts

@@ -17,6 +17,7 @@ import XDropdownListToggleButtonComponent from "./toggle-button";
 import { XDropdownListItemAPI } from "./item";
 import { restartableTask, timeout } from "ember-concurrency";
 import maybeScrollIntoView from "hermes/utils/maybe-scroll-into-view";
+import { MatchAnchorWidthOptions } from "hermes/components/floating-u-i/content";
 
 export type XDropdownListToggleComponentBoundArgs =
   | "contentIsShown"
@@ -53,6 +54,7 @@ interface XDropdownListComponentSignature {
     disabled?: boolean;
     offset?: OffsetOptions;
     label?: string;
+    matchAnchorWidth?: MatchAnchorWidthOptions;
 
     /**
      * Whether an asynchronous list is loading.

web/app/styles/components/header/search.scss

@@ -1,5 +1,5 @@
 .x-dropdown-list.search-popover {
-  @apply w-[calc(100%+4px)] max-h-[none] min-w-[420px] max-w-[none];
+  @apply max-h-[none] min-w-[420px];
 
   &.no-best-matches {
     .x-dropdown-list-items {
@@ -10,7 +10,7 @@
     @apply items-start;
 
     &.global-search-popover-header-link {
-      @apply pt-2.5 pb-[10px] items-center;
+      @apply items-center pt-2.5 pb-[10px];
     }
 
     &.is-aria-selected {
@@ -28,21 +28,21 @@
 }
 
 .global-search-best-matches-header {
-  @apply border-t border-t-color-border-primary pt-2 px-3;
+  @apply border-t border-t-color-border-primary px-3 pt-2;
 
   h5 {
-    @apply text-display-100 text-color-foreground-faint font-medium;
+    @apply text-display-100 font-medium text-color-foreground-faint;
   }
 }
 
 .global-search-result {
-  @apply flex items-center space-x-3 py-2 px-3 h-20;
+  @apply flex h-20 items-center space-x-3 py-2 px-3;
 }
 
 .global-search-result-text-content {
   @apply flex flex-col space-y-1 overflow-hidden;
 }
 
 .global-search-result-title {
-  @apply text-body-200 font-semibold text-color-foreground-strong truncate;
+  @apply truncate text-body-200 font-semibold text-color-foreground-strong;
 }

web/tests/integration/components/floating-u-i/index-test.ts

@@ -1,4 +1,4 @@
-import { module, test, todo } from "qunit";
+import { module, test } from "qunit";
 import { setupRenderingTest } from "ember-qunit";
 import { click, render } from "@ember/test-helpers";
 import { hbs } from "ember-cli-htmlbars";
@@ -90,4 +90,92 @@ module("Integration | Component | floating-u-i/index", function (hooks) {
 
     assert.dom(".close-button").exists('the "close" action was disabled');
   });
+
+  test("the popover can match the anchor width", async function (assert) {
+    await render(hbs`
+      <FloatingUI @matchAnchorWidth={{true}}>
+        <:anchor as |f|>
+          <Action
+            id="open-button-1"
+            style="width:500px;"
+            {{on "click" f.showContent}}
+            {{did-insert f.registerAnchor}}
+          >
+            Open
+          </Action>
+        </:anchor>
+        <:content>
+          <div id="content-1">
+            Content
+          </div>
+        </:content>
+      </FloatingUI>
+
+      <FloatingUI @matchAnchorWidth={{hash enabled=true additionalWidth=100}}>
+        <:anchor as |f|>
+          <Action
+            id="open-button-2"
+            style="width:500px;"
+            {{on "click" f.showContent}}
+            {{did-insert f.registerAnchor}}
+          >
+            Open
+          </Action>
+        </:anchor>
+        <:content>
+          <div id="content-2">
+            Content
+          </div>
+        </:content>
+      </FloatingUI>
+
+      <FloatingUI @matchAnchorWidth={{hash enabled=true additionalWidth=-100}}>
+        <:anchor as |f|>
+          <Action
+            id="open-button-3"
+            style="width:500px;"
+            {{on "click" f.showContent}}
+            {{did-insert f.registerAnchor}}
+          >
+            Open
+          </Action>
+        </:anchor>
+        <:content>
+          <div id="content-3">
+            Content
+          </div>
+        </:content>
+      </FloatingUI>
+    `);
+
+    await click("#open-button-1");
+
+    let contentWidth = htmlElement("#content-1").offsetWidth;
+
+    assert.equal(
+      contentWidth,
+      500,
+      "the content width matches the anchor width"
+    );
+
+    await click("#open-button-2");
+
+    contentWidth = htmlElement("#content-2").offsetWidth;
+
+    assert.equal(
+      contentWidth,
+      600,
+      "the content width matches the anchor width plus the additional width"
+    );
+
+    await click("#open-button-3");
+
+    contentWidth = htmlElement("#content-3").offsetWidth;
+
+    assert.equal(
+      contentWidth,
+      400,
+      "the content width matches the anchor width minus the additional width"
+    );
+  });
 });