mirror of
https://git.anonymousland.org/anonymousland/anonymousland.git
synced 2024-12-18 03:44:24 -05:00
90 lines
3.3 KiB
JavaScript
90 lines
3.3 KiB
JavaScript
let layer1, layer2, layer3, layer4;
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let themeBase;
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$(document).ready(() => {
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layer1 = d3.select("#bg-layer1");
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layer2 = d3.select("#bg-layer2");
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layer3 = d3.select("#bg-layer3");
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layer4 = d3.select("#bg-layer4");
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themeBase = localStorage.getItem("themeBase") || document.getElementById("css-theme").getAttribute("href").match("-(light|dark).css")[1];
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setTheme(themeBase);
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makeStrips([layer1, layer2, layer3, layer4]);
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$(document).scroll(updateBackground);
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$(window).resize(updateBackground);
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$("table").addClass("table table-hover");
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$("img").addClass("img img-responsive");
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$(".content-div > h1, .content-div > a > h1").addClass("h1-strip");
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setTimeout(updateBackground, 500);
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});
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function drawLine(x, y, w, h, layer) {
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let line = layer.append("rect")
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.attr("x", x)
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.attr("y", y)
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.attr("width", w)
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.attr("height", h)
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.attr("fill", "url(#Gradient1)");
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}
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function updateBackground() {
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// Update stripes
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let contentX = ($(".content-div").offset().left);
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let layer1Y = window.pageYOffset / 5;
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let layer2Y = window.pageYOffset / 4;
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let layer3Y = window.pageYOffset / 3;
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let layer4Y = window.pageYOffset / 2;
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layer1.attr("transform", `translate(${contentX}, ${-layer1Y})`);
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layer2.attr("transform", `translate(${contentX}, ${-layer2Y})`);
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layer3.attr("transform", `translate(${contentX}, ${-layer3Y})`);
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layer4.attr("transform", `translate(${contentX}, ${-layer4Y})`);
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// Update transparent overlays over h1
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$(".h1-overlay").remove();
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$(".h1-strip")
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.filter((index, node) => $(node).isInViewport())
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.map((index, node) => {
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let {left, top, right, bottom, x, y, width, height} = node.getBoundingClientRect();
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let style = window.getComputedStyle?getComputedStyle(node, null):node.currentStyle;
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let marginTop = parseInt(style.marginTop) || 0;
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let overlay = document.createElement("div");
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overlay.classList.add("h1-overlay");
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overlay.style.left = 0;
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overlay.style.top = `${window.scrollY+top-marginTop}px`;
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overlay.style.height = `${height+marginTop}px`;
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document.body.appendChild(overlay);
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});
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}
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function makeStrips(layers) {
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let layerProbs = new Array(layers.length).fill(0).map((_, index) => index / layers.length);
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for (let i = 10; i < 100; i *= 1.05) {
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let index = Math.floor(Math.random() * layers.length);
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let randomLayer = layers[index];
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if (Math.random() > layerProbs[index]) {
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drawLine(-i, 100, 1, 1000 * (Math.random() + 1), randomLayer);
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}
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}
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updateBackground();
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}
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function toggleTheme() {
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themeBase = themeBase == "light" ? "dark" : "light";
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localStorage.setItem("themeBase", themeBase);
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setTheme(themeBase);
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}
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function setTheme(themeBase) {
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let oldTheme = themeBase == "light" ? "dark" : "light";
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let href = document.getElementById("css-theme").getAttribute("href").replace(oldTheme, themeBase);
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let css = document.getElementById("css-theme");
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css.setAttribute("href", href);
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}
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// https://medium.com/talk-like/detecting-if-an-element-is-in-the-viewport-jquery-a6a4405a3ea2
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$.fn.isInViewport = function() {
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var elementTop = $(this).offset().top;
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var elementBottom = elementTop + $(this).outerHeight();
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var viewportTop = $(window).scrollTop();
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var viewportBottom = viewportTop + $(window).height();
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return elementBottom > viewportTop && elementTop < viewportBottom;
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};
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