Update search widget

internal/assets/static/main.css

@@ -354,6 +354,23 @@ body {
     border: 1px solid var(--color-negative);
 }
 
+kbd {
+    font: inherit;
+    padding: 0.1rem 0.8rem;
+    border-radius: var(--border-radius);
+    border: 2px solid var(--color-widget-background-highlight);
+    box-shadow: 0 2px 0 var(--color-widget-background-highlight);
+    user-select: none;
+    transition: transform .1s, box-shadow .1s;
+    font-size: var(--font-size-h5);
+    cursor: pointer;
+}
+
+kbd:active {
+    transform: translateY(2px);
+    box-shadow: 0 0 0 0 var(--color-widget-background-highlight);
+}
+
 .content-bounds {
     max-width: 1600px;
     margin-inline: auto;
@@ -665,6 +682,85 @@ body {
     -webkit-box-orient: vertical;
 }
 
+.search-icon {
+    width: 2.3rem;
+}
+
+.search-icon-container {
+    position: relative;
+    flex-shrink: 0;
+}
+
+/* gives a wider hit area for the 3 people that will notice the animation : ) */
+.search-icon-container::before {
+    content: '';
+    position: absolute;
+    inset: -1rem;
+}
+
+.search-icon-container:hover > .search-icon {
+    animation: searchIconHover 2.9s forwards;
+}
+
+@keyframes searchIconHover {
+    0%, 39% { translate: 0 0; }
+    20% { scale: 1.3; }
+    40% { scale: 1; }
+    50% { translate: -30% 30%; }
+    70% { translate: 30% -30%; }
+    90% { translate: -30% -30%; }
+    100% { translate: 0 0; }
+}
+
+.search {
+    transition: border-color .2s;
+    position: relative;
+}
+
+.search:hover {
+    border-color: var(--color-text-subdue);
+}
+
+.search:focus-within {
+    border-color: var(--color-primary);
+}
+
+.search-input {
+    border: 0;
+    background: none;
+    width: 100%;
+    height: 6rem;
+    font: inherit;
+    outline: none;
+}
+
+.search-input::placeholder {
+    color: var(--color-text-base-muted);
+    opacity: 1;
+}
+
+.search-bangs { display: none; }
+
+.search-bang {
+    border-radius: calc(var(--border-radius) * 2);
+    background: var(--color-widget-background-highlight);
+    padding: 0.3rem 1rem;
+    flex-shrink: 0;
+    font-size: var(--font-size-h5);
+    animation: searchBangsEntrance .3s cubic-bezier(0.25, 1, 0.5, 1) backwards;
+}
+
+@keyframes searchBangsEntrance {
+    0% {
+        opacity: 0;
+        transform: translateX(-10px);
+    }
+}
+
+.search-bang:empty {
+    display: none;
+}
+
 .forum-post-list-item {
     display: flex;
     gap: 1.2rem;

internal/assets/static/main.js

@@ -107,6 +107,103 @@ function updateRelativeTimeForElements(elements)
     }
 }
 
+function setupSearchboxes() {
+    const searchWidgets = document.getElementsByClassName("search");
+
+    if (searchWidgets.length == 0) {
+        return;
+    }
+
+    for (let i = 0; i < searchWidgets.length; i++) {
+        const widget = searchWidgets[i];
+        const defaultSearchUrl = widget.dataset.defaultSearchUrl;
+        const inputElement = widget.getElementsByClassName("search-input")[0];
+        const bangElement = widget.getElementsByClassName("search-bang")[0];
+        const bangs = widget.querySelectorAll(".search-bangs > input");
+        const bangsMap = {};
+        const kbdElement = widget.getElementsByTagName("kbd")[0];
+        let currentBang = null;
+
+        for (let j = 0; j < bangs.length; j++) {
+            const bang = bangs[j];
+            bangsMap[bang.dataset.shortcut] = bang;
+        }
+
+        const handleKeyDown = (event) => {
+            if (event.key == "Escape") {
+                inputElement.blur();
+                return;
+            }
+
+            if (event.key == "Enter") {
+                const input = inputElement.value.trim();
+                let query;
+                let searchUrlTemplate;
+
+                if (currentBang != null) {
+                    query = input.slice(currentBang.dataset.shortcut.length + 1);
+                    searchUrlTemplate = currentBang.dataset.url;
+                } else {
+                    query = input;
+                    searchUrlTemplate = defaultSearchUrl;
+                }
+
+                if (query.length == 0) {
+                    return;
+                }
+
+                const url = searchUrlTemplate.replace("!QUERY!", encodeURIComponent(query));
+
+                if (event.ctrlKey) {
+                    window.open(url, '_blank').focus();
+                } else {
+                    window.location.href = url;
+                }
+
+                return;
+            }
+        };
+
+        const changeCurrentBang = (bang) => {
+            currentBang = bang;
+            bangElement.textContent = bang != null ? bang.dataset.title : "";
+        }
+
+        const handleInput = (event) => {
+            const value = event.target.value.trimStart();
+            const words = value.split(" ");
+
+            if (words.length >= 2 && words[0] in bangsMap) {
+                changeCurrentBang(bangsMap[words[0]]);
+                return;
+            }
+
+            changeCurrentBang(null);
+        };
+
+        inputElement.addEventListener("focus", () => {
+            document.addEventListener("keydown", handleKeyDown);
+            document.addEventListener("input", handleInput);
+        });
+        inputElement.addEventListener("blur", () => {
+            document.removeEventListener("keydown", handleKeyDown);
+            document.removeEventListener("input", handleInput);
+        });
+
+        document.addEventListener("keydown", (event) => {
+            if (['INPUT', 'TEXTAREA'].includes(document.activeElement.tagName)) return;
+            if (event.key != "s") return;
+
+            inputElement.focus();
+            event.preventDefault();
+        });
+
+        kbdElement.addEventListener("mousedown", () => {
+            requestAnimationFrame(() => inputElement.focus());
+        });
+    }
+}
+
 function setupDynamicRelativeTime() {
     const elements = document.querySelectorAll("[data-dynamic-relative-time]");
     const updateInterval = 60 * 1000;
@@ -454,6 +551,7 @@ async function setupPage() {
     try {
         setupClocks()
         setupCarousels();
+        setupSearchboxes();
         setupCollapsibleLists();
         setupCollapsibleGrids();
         setupDynamicRelativeTime();