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Merged
gnacho merged 1 commit into from
Oct 28, 2026
Merged

feat(landing): swipe the screenshot slider on phones #230

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102 changes: 98 additions & 4 deletions landing/app.js
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -68,9 +68,14 @@
});
}

function showSlide(i) {
var reduceMotion = window.matchMedia("(prefers-reduced-motion: reduce)");
var animating = false;

function mod(i, n) { return ((i % n) + n) % n; }

function setSlide(i) {
var list = activeSlides();
slideIndex = ((i % list.length) + list.length) % list.length;
slideIndex = mod(i, list.length);
var s = list[slideIndex];
slideImg.src = s.src;
slideCaption.textContent = (I18N[lang] || I18N.es)[s.cap] || "";
Expand All @@ -79,8 +84,96 @@
});
}

document.getElementById("slidePrev").addEventListener("click", function () { showSlide(slideIndex - 1); });
document.getElementById("slideNext").addEventListener("click", function () { showSlide(slideIndex + 1); });
// dir: +1 next, -1 previous. Without it the direction comes from the index.
function showSlide(i, dir) {
var list = activeSlides();
var target = mod(i, list.length);
if (dir === undefined) dir = target === slideIndex ? 1 : (target > slideIndex ? 1 : -1);
if (target === slideIndex || animating || reduceMotion.matches) {
setSlide(target);
slideImg.style.transition = "";
slideImg.style.transform = "";
slideImg.style.opacity = "";
return;
}
animating = true;
slideImg.style.transition = "transform 180ms ease, opacity 180ms ease";
slideImg.style.transform = "translateX(" + (-dir * 32) + "px)";
slideImg.style.opacity = "0.35";
window.setTimeout(function () {
setSlide(target);
slideImg.style.transition = "none";
slideImg.style.transform = "translateX(" + (dir * 32) + "px)";
void slideImg.offsetWidth;
slideImg.style.transition = "transform 200ms ease, opacity 200ms ease";
slideImg.style.transform = "translateX(0)";
slideImg.style.opacity = "1";
window.setTimeout(function () {
animating = false;
slideImg.style.transition = "";
slideImg.style.transform = "";
slideImg.style.opacity = "";
}, 220);
}, 180);
}

document.getElementById("slidePrev").addEventListener("click", function () { showSlide(slideIndex - 1, -1); });
document.getElementById("slideNext").addEventListener("click", function () { showSlide(slideIndex + 1, 1); });

// ---------- Swipe del slider (tap y arrastre) ----------
var slideViewport = document.querySelector(".slider-viewport");
var drag = null;
var suppressLightbox = false;

function resetSlideImage() {
slideImg.style.transition = "transform 200ms ease, opacity 200ms ease";
slideImg.style.transform = "translateX(0)";
slideImg.style.opacity = "1";
}

slideViewport.addEventListener("pointerdown", function (e) {
if (e.button !== 0 || animating) return;
drag = { x: e.clientX, y: e.clientY, dx: 0, active: false, id: e.pointerId };
});

slideViewport.addEventListener("pointermove", function (e) {
if (!drag || e.pointerId !== drag.id) return;
var dx = e.clientX - drag.x;
var dy = e.clientY - drag.y;
if (!drag.active) {
if (Math.abs(dx) < 8 && Math.abs(dy) < 8) return;
if (Math.abs(dy) > Math.abs(dx)) { drag = null; return; }
drag.active = true;
slideViewport.setPointerCapture(e.pointerId);
slideImg.style.transition = "none";
}
drag.dx = dx;
slideImg.style.transform = "translateX(" + dx + "px)";
slideImg.style.opacity = String(Math.max(0.55, 1 - Math.abs(dx) / 600));
e.preventDefault();
});

function endDrag() {
if (!drag) return;
var d = drag;
drag = null;
if (!d.active) return;
suppressLightbox = true;
window.setTimeout(function () { suppressLightbox = false; }, 300);
var threshold = Math.min(70, slideViewport.clientWidth * 0.18);
if (Math.abs(d.dx) > threshold) {
var dir = d.dx < 0 ? 1 : -1;
showSlide(slideIndex + dir, dir);
} else {
resetSlideImage();
}
}

slideViewport.addEventListener("pointerup", endDrag);
slideViewport.addEventListener("pointercancel", function () {
if (drag && drag.active) resetSlideImage();
drag = null;
});

document.addEventListener("keydown", function (e) {
if (lightbox.open) return;
Expand All @@ -102,6 +195,7 @@

// ---------- Lightbox ----------
slideImg.addEventListener("click", function () {
if (suppressLightbox) { suppressLightbox = false; return; }
lightboxImg.src = slideImg.src;
lightboxImg.alt = slideImg.alt;
lightbox.showModal();
Expand Down
8 changes: 4 additions & 4 deletions landing/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,7 @@
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link href="https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=JetBrains+Mono:wght@400;600&display=swap" rel="stylesheet" />
<link rel="stylesheet" href="styles.css?v=4" />
<link rel="stylesheet" href="styles.css?v=5" />
<script type="application/ld+json">
{
"@context": "https://schema.org",
Expand Down Expand Up @@ -174,12 +174,12 @@ <h2 class="reveal" data-i18n="shots.title">Un vistazo a la interfaz</h2>
<p class="lead reveal" data-i18n="shots.lead">Capturas reales de la app, en los dos idiomas y los dos temas.</p>
<div class="slider reveal" id="slider">
<div class="slider-viewport">
<img id="slideImg" src="assets/shots/main-es-light.webp" alt="Ventana principal de NextSync" data-i18n-alt="shots.alt" width="1800" height="1200" />
<img id="slideImg" src="assets/shots/main-es-light.webp" alt="Ventana principal de NextSync" data-i18n-alt="shots.alt" width="1800" height="1200" draggable="false" />
</div>
<button class="slider-arrow prev" id="slidePrev" aria-label="Captura anterior" data-i18n-aria="shots.prev">&#10094;</button>
<button class="slider-arrow next" id="slideNext" aria-label="Captura siguiente" data-i18n-aria="shots.next">&#10095;</button>
<div class="slider-thumbs" id="slideThumbs" role="tablist"></div>
<p class="slider-caption" id="slideCaption"></p>
<p class="slider-caption" id="slideCaption" aria-live="polite"></p>
</div>
</div></section>

Expand Down Expand Up @@ -260,6 +260,6 @@ <h2 class="reveal" data-i18n="about.title">Por qué existe</h2>
<script async data-goatcounter="https://stats.nextsync.cloudless.club/count" src="https://stats.nextsync.cloudless.club/count.js"></script>
<script defer src="https://stat.domatix.com/script.js" data-website-id="0fd3377e-8bba-4651-96e4-82faee5896be"></script>
<script src="i18n.js?v=4"></script>
<script src="app.js?v=4"></script>
<script src="app.js?v=5"></script>
</body>
</html>
8 changes: 5 additions & 3 deletions landing/styles.css
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Original file line number Diff line number Diff line change
Expand Up @@ -216,8 +216,9 @@ a:hover { text-decoration: underline; }
.slider-viewport {
border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
border: 1px solid var(--card-border); cursor: zoom-in;
touch-action: pan-y;
}
.slider-viewport img { display: block; width: 100%; height: auto; }
.slider-viewport img { display: block; width: 100%; height: auto; user-select: none; -webkit-user-drag: none; }
.slider-arrow {
position: absolute; top: 40%; transform: translateY(-50%);
width: 46px; height: 46px; border-radius: 50%; border: none; cursor: pointer;
Expand Down Expand Up @@ -323,7 +324,8 @@ dialog#lightbox img { display: block; max-width: 92vw; max-height: 86vh; }
.nav-github, .nav-actions .nav-github { display: inline-flex; }
.hero-install { display: none; }
.nav-actions { margin-left: auto; gap: 0.45rem; }
.slider-arrow.prev { left: 6px; }
.slider-arrow.next { right: 6px; }
/* Phones: swipe on the image and the thumbnails are the navigation.
Floating arrows would only cover the screenshot. */
.slider-arrow { display: none; }
.slider-thumbs button { width: 72px; }
}
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