refactor(frontend): remove spicy-sections

gcp/website/frontend3/package.json

@@ -15,8 +15,7 @@
     "@material/layout-grid": "13.0.0",
     "@material/theme": "13.0.0",
     "@material/web": "^1.5.0",
-    "lit": "2.8.0",
-    "spicy-sections": "git+https://github.com/tabvengers/spicy-sections.git#c3aae99dbf1e627cdf03a35c913d7f6e970de22b"
+    "lit": "2.8.0"
   },
   "devDependencies": {
     "copy-webpack-plugin": "10.2.4",

gcp/website/frontend3/src/index.js

@@ -4,7 +4,7 @@ import '@material/web/icon/icon.js';
 import '@material/web/iconbutton/icon-button.js';
 import '@material/web/progress/circular-progress.js';
 import '@hotwired/turbo';
-import 'spicy-sections/src/SpicySections';
+import './osv-tabs.js';
 import { MdFilledTextField } from '@material/web/textfield/filled-text-field.js';
 import { LitElement, html } from 'lit';
 import { ExpandableSearch, SearchSuggestionsManager } from './search.js';

gcp/website/frontend3/src/osv-tabs.js

@@ -0,0 +1,223 @@
+class OsvTabs extends HTMLElement {
+  constructor() {
+    super();
+    this.breakpoint = 500;
+    this.mediaQuery = null;
+    this.headers = [];
+    this.panels = [];
+    this.activeIndex = 0;
+    this.headerListeners = null;
+
+    // shadow DOM for tab-bar layout
+    this.attachShadow({ mode: "open" });
+    this.shadowRoot.innerHTML = `
+      <style>
+        :host([affordance="tab-bar"]) {
+          display: block;
+        }
+        :host([affordance="tab-bar"]) .tab-list {
+          display: flex;
+          flex-wrap: wrap;
+        }
+        :host([affordance="tab-bar"]) ::slotted(*) {
+          display: none;
+        }
+        :host([affordance="tab-bar"]) .tab-list ::slotted(h2),
+        :host([affordance="tab-bar"]) .tab-list ::slotted(h3) {
+          display: block;
+        }
+        :host([affordance="tab-bar"]) .panel-container ::slotted(div[data-panel-active]) {
+          display: block;
+        }
+        :host([affordance="collapse"]) .tab-list {
+          display: none;
+        }
+        :host([affordance="collapse"]) .panel-container {
+          display: none;
+        }
+        :host([affordance="collapse"]) ::slotted(*) {
+          display: block;
+        }
+      </style>
+      <div class="tab-list" part="tab-list">
+        <slot name="tab"></slot>
+      </div>
+      <div class="panel-container" part="panel-container">
+        <slot name="panel"></slot>
+      </div>
+      <slot></slot>
+    `;
+  }
+
+  connectedCallback() {
+    this.breakpoint = parseInt(this.getAttribute("breakpoint")) || 500;
+    this.collectHeadersAndPanels();
+    this.setupMediaQuery();
+    this.updateAffordance();
+    this.setupEventListeners();
+  }
+
+  disconnectedCallback() {
+    if (this.mediaQuery) {
+      this.mediaQuery.removeEventListener("change", this.boundUpdateAffordance);
+    }
+    this.removeEventListeners();
+  }
+
+  collectHeadersAndPanels() {
+    this.headers = [];
+    this.panels = [];
+
+    const children = Array.from(this.children);
+    for (let i = 0; i < children.length; i++) {
+      const child = children[i];
+      if (child.matches("h2, h3")) {
+        const nextSibling = children[i + 1];
+        if (nextSibling && nextSibling.matches("div")) {
+          this.headers.push(child);
+          this.panels.push(nextSibling);
+        }
+      }
+    }
+  }
+
+  setupMediaQuery() {
+    this.mediaQuery = window.matchMedia(
+      `(min-width: ${this.breakpoint + 1}px)`
+    );
+    this.boundUpdateAffordance = () => this.updateAffordance();
+    this.mediaQuery.addEventListener("change", this.boundUpdateAffordance);
+  }
+
+  setupEventListeners() {
+    this.headerListeners = this.headers.map((header, index) => {
+      const clickListener = (e) => this.handleHeaderClick(index, e);
+      const keydownListener = (e) => this.handleKeydown(index, e);
+
+      header.addEventListener("click", clickListener);
+      header.addEventListener("keydown", keydownListener);
+
+      return { header, clickListener, keydownListener };
+    });
+  }
+
+  removeEventListeners() {
+    if (this.headerListeners) {
+      this.headerListeners.forEach(({ header, clickListener, keydownListener }) => {
+        header.removeEventListener("click", clickListener);
+        header.removeEventListener("keydown", keydownListener);
+      });
+      this.headerListeners = null;
+    }
+  }
+
+  updateAffordance() {
+    const isDesktop = this.mediaQuery.matches;
+    const affordance = isDesktop ? "tab-bar" : "collapse";
+    this.setAttribute("affordance", affordance);
+
+    if (isDesktop) {
+      this.renderTabs();
+    } else {
+      this.renderAccordion();
+    }
+  }
+
+  renderTabs() {
+    this.headers.forEach((header, index) => {
+      const isActive = index === this.activeIndex;
+      header.setAttribute("slot", "tab");
+      header.setAttribute("tabindex", isActive ? "0" : "-1");
+      header.setAttribute("role", "tab");
+      header.setAttribute("aria-selected", isActive ? "true" : "false");
+      header.removeAttribute("aria-expanded");
+      header.removeAttribute("expanded");
+    });
+
+    this.panels.forEach((panel, index) => {
+      const isActive = index === this.activeIndex;
+      panel.setAttribute("slot", "panel");
+      panel.setAttribute("role", "tabpanel");
+      if (isActive) {
+        panel.setAttribute("data-panel-active", "");
+      } else {
+        panel.removeAttribute("data-panel-active");
+      }
+      panel.style.display = isActive ? "" : "none";
+    });
+  }
+
+  renderAccordion() {
+    this.headers.forEach((header, index) => {
+      const panel = this.panels[index];
+
+      header.removeAttribute("slot");
+      header.removeAttribute("role");
+      header.removeAttribute("aria-selected");
+      header.setAttribute("tabindex", "0");
+      header.setAttribute("aria-expanded", "true");
+      header.setAttribute("expanded", "");
+
+      panel.removeAttribute("slot");
+      panel.removeAttribute("data-panel-active");
+      panel.style.display = "";
+    });
+
+    this.panels.forEach((panel) => {
+      panel.setAttribute("role", "region");
+    });
+  }
+
+  handleHeaderClick(index, event) {
+    if (!this.headers[index].contains(event.target)) {
+      return;
+    }
+
+    const affordance = this.getAttribute("affordance");
+
+    if (affordance === "tab-bar") {
+      this.activeIndex = index;
+      this.renderTabs();
+    } else {
+      const panel = this.panels[index];
+      const header = this.headers[index];
+      const isExpanded = panel.style.display !== "none";
+
+      panel.style.display = isExpanded ? "none" : "";
+      header.setAttribute("aria-expanded", isExpanded ? "false" : "true");
+      if (isExpanded) {
+        header.removeAttribute("expanded");
+      } else {
+        header.setAttribute("expanded", "");
+      }
+    }
+  }
+
+  handleKeydown(index, event) {
+    const affordance = this.getAttribute("affordance");
+
+    if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      this.handleHeaderClick(index, { target: this.headers[index] });
+    }
+
+    if (affordance === "tab-bar") {
+      if (event.key === "ArrowRight" || event.key === "ArrowDown") {
+        event.preventDefault();
+        const nextIndex = (index + 1) % this.headers.length;
+        this.activeIndex = nextIndex;
+        this.renderTabs();
+        this.headers[nextIndex].focus();
+      } else if (event.key === "ArrowLeft" || event.key === "ArrowUp") {
+        event.preventDefault();
+        const prevIndex =
+          (index - 1 + this.headers.length) % this.headers.length;
+        this.activeIndex = prevIndex;
+        this.renderTabs();
+        this.headers[prevIndex].focus();
+      }
+    }
+  }
+}
+
+customElements.define("osv-tabs", OsvTabs);