378 lines
11 KiB
HTML
378 lines
11 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<style type="text/css">
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body {
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margin: 0;
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padding: 0;
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height: 100%;
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overflow: hidden;
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}
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.container {
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display: grid;
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grid-template: "left middle" 1fr /
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200px 1fr;
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height: 100vh;
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}
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.container .left {
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display: grid;
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grid-template:
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"welcome" auto
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"rooms" 1fr /
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1fr;
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min-height: 0;
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}
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.container .middle {
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display: grid;
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grid-template:
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"header" auto
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"timeline" 1fr
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"composer" auto /
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1fr;
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min-height: 0;
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position: relative;
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}
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.left { grid-area: left;}
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.left p {
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grid-area welcome;
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display: flex;
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}
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.left ul {
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grid-area: rooms;
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min-height: 0;
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overflow-y: auto;
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}
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.middle { grid-area: middle;}
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.middle .header { grid-area: header;}
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.middle .timeline {
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grid-area: timeline;
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min-height: 0;
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overflow-y: auto;
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}
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.middle .composer {
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grid-area: composer;
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}
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.header {
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display: flex;
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}
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.header h2 {
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flex: 1;
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}
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.composer {
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display: flex;
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}
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.composer input {
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display: block;
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flex: 1;
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}
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.menu {
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position: absolute;
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border-radius: 8px;
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box-shadow: 2px 2px 10px rgba(0,0,0,0.5);
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padding: 16px;
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background-color: white;
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z-index: 1;
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list-style: none;
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margin: 0;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<div class="left">
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<p>Welcome!<button>⋮</button></p>
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<ul>
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<li>Room xyz <button>⋮</button></li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz <button>⋮</button></li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz</li>
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<li>Room xyz <button>⋮</button></li>
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</ul>
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</div>
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<div class="middle">
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<div class="header">
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<h2>Room xyz</h2>
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<button>⋮</button>
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</div>
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<ul class="timeline">
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<li>Message abc</li>
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<li>Message abc <button>⋮</button></li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc <button>⋮</button></li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc</li>
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<li>Message abc <button>⋮</button></li>
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</ul>
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<div class="composer">
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<input type="text" name="">
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<button>⋮</button>
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</div>
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</div>
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</div>
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<script type="text/javascript">
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let menu;
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function createMenu(options) {
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const menu = document.createElement("ul");
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menu.className = "menu";
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for (const o of options) {
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const li = document.createElement("li");
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li.innerText = o;
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menu.appendChild(li);
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}
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return menu;
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}
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function showMenu(evt) {
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if (menu) {
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menu = menu.close();
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} else if (evt.target.tagName.toLowerCase() === "button") {
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menu = showPopup(evt.target, createMenu(["Send file", "Save contact", "Send picture", "Foo the bar"]), {
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horizontal: {
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relativeTo: "end",
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align: "start",
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after: 0,
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},
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vertical: {
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relativeTo: "end",
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align: "end",
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after: 10,
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}
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});
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}
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}
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function showMenuInScroller(evt) {
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if (!menu && evt.target.tagName.toLowerCase() === "button") {
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evt.stopPropagation();
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menu = showPopup(evt.target, createMenu(["Show reactions", "Share"]), {
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horizontal: {
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relativeTo: "start",
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align: "end",
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after: 10,
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},
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vertical: {
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relativeTo: "start",
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align: "center",
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}
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});
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}
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}
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document.body.addEventListener("click", showMenu, false);
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document.querySelector(".middle ul").addEventListener("click", showMenuInScroller, false);
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document.querySelector(".left ul").addEventListener("click", showMenuInScroller, false);
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function showPopup(target, popup, arrangement) {
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targetAxes = elementToAxes(target);
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if (!arrangement) {
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arrangement = getAutoArrangement(targetAxes);
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}
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target.offsetParent.appendChild(popup);
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const popupAxes = elementToAxes(popup);
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const scrollerAxes = elementToAxes(findScrollParent(target));
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const offsetParentAxes = elementToAxes(target.offsetParent);
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function reposition() {
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if (scrollerAxes && !isVisibleInScrollParent(targetAxes.vertical, scrollerAxes.vertical)) {
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popupObj.close();
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}
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applyArrangement(
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popupAxes.vertical,
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targetAxes.vertical,
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offsetParentAxes.vertical,
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scrollerAxes?.vertical,
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arrangement.vertical
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);
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applyArrangement(
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popupAxes.horizontal,
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targetAxes.horizontal,
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offsetParentAxes.horizontal,
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scrollerAxes?.horizontal,
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arrangement.horizontal
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);
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}
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reposition();
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document.body.addEventListener("scroll", reposition, true);
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const popupObj = {
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close() {
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document.body.removeEventListener("scroll", reposition, true);
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popup.remove();
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}
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};
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return popupObj;
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}
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function elementToAxes(element) {
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if (element) {
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return {
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horizontal: new HorizontalAxis(element),
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vertical: new VerticalAxis(element),
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element
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};
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}
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}
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function findScrollParent(el) {
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let parent = el;
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do {
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parent = parent.parentElement;
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if (parent.scrollHeight > parent.clientHeight) {
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return parent;
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}
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} while (parent !== el.offsetParent);
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}
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function isVisibleInScrollParent(targetAxis, scrollerAxis) {
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// clipped at start?
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if ((targetAxis.offsetStart + targetAxis.clientSize) < (
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scrollerAxis.offsetStart +
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scrollerAxis.scrollOffset
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)) {
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return false;
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}
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// clipped at end?
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if (targetAxis.offsetStart > (
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scrollerAxis.offsetStart +
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scrollerAxis.clientSize +
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scrollerAxis.scrollOffset
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)) {
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return false;
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}
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return true;
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}
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function applyArrangement(elAxis, targetAxis, offsetParentAxis, scrollerAxis, {relativeTo, align, before, after}) {
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if (relativeTo === "end") {
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let end = offsetParentAxis.clientSize - targetAxis.offsetStart;
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if (align === "end") {
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end -= elAxis.offsetSize;
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} else if (align === "center") {
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end -= ((elAxis.offsetSize / 2) - (targetAxis.offsetSize / 2));
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}
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if (typeof before === "number") {
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end += before;
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} else if (typeof after === "number") {
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end -= (targetAxis.offsetSize + after);
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}
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elAxis.end = end;
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} else if (relativeTo === "start") {
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let scrollOffset = scrollerAxis?.scrollOffset || 0;
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let start = targetAxis.offsetStart - scrollOffset;
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if (align === "start") {
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start -= elAxis.offsetSize;
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} else if (align === "center") {
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start -= ((elAxis.offsetSize / 2) - (targetAxis.offsetSize / 2));
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}
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if (typeof before === "number") {
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start -= before;
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} else if (typeof after === "number") {
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start += (targetAxis.offsetSize + after);
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}
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elAxis.start = start;
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} else {
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throw new Error("unknown relativeTo: " + relativeTo);
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}
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}
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class HorizontalAxis {
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constructor(el) {
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this.element = el;
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}
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get scrollOffset() {return this.element.scrollLeft;}
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get clientSize() {return this.element.clientWidth;}
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get offsetSize() {return this.element.offsetWidth;}
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get offsetStart() {return this.element.offsetLeft;}
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set start(value) {this.element.style.left = `${value}px`;}
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set end(value) {this.element.style.right = `${value}px`;}
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}
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class VerticalAxis {
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constructor(el) {
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this.element = el;
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}
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get scrollOffset() {return this.element.scrollTop;}
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get clientSize() {return this.element.clientHeight;}
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get offsetSize() {return this.element.offsetHeight;}
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get offsetStart() {return this.element.offsetTop;}
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set start(value) {this.element.style.top = `${value}px`;}
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set end(value) {this.element.style.bottom = `${value}px`;}
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}
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</script>
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</body>
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</html>
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