From 7f42d61161ae010e5a970934d9f827ddafa0d586 Mon Sep 17 00:00:00 2001
From: Thomas Lange <code@nerdmind.de>
Date: Sat, 31 Mar 2018 15:47:05 +0200
Subject: Initial commit

---
 rsrc/main.js | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 rsrc/main.js

(limited to 'rsrc/main.js')

diff --git a/rsrc/main.js b/rsrc/main.js
new file mode 100644
index 0000000..c35f983
--- /dev/null
+++ b/rsrc/main.js
@@ -0,0 +1,61 @@
+class Slideshow {
+	constructor(node) {
+		let prev, next, time;
+
+		this.autostop = false;
+		this.timeout = false;
+		this.current = 0;
+		this.list = node.getElementsByTagName("ul")[0].getElementsByTagName("li");
+
+		if(prev = node.getElementsByClassName("prev")[0]) {
+			prev.onclick = () => {
+				this.initializeTimeout();
+				this.changeDirection("prev")
+			};
+		}
+
+		if(next = node.getElementsByClassName("next")[0]) {
+			next.onclick = () => {
+				this.initializeTimeout();
+				this.changeDirection("next");
+			};
+		}
+
+		if(time = node.getAttribute("data-time")) {
+			setInterval(() => {
+				!this.autostop && this.changeDirection("next");
+			}, time);
+		}
+	}
+
+	initializeTimeout() {
+		if(this.timeout) {
+			clearTimeout(this.timeout);
+		}
+
+		this.autostop = true;
+		this.timeout = setTimeout(() => {
+			this.autostop = false;
+		}, 15000);
+	}
+
+	changeDirection(direction) {
+		(direction === "prev" && --this.current);
+		(direction === "next" && ++this.current);
+
+		if(this.list[this.current] === undefined) {
+			switch(direction) {
+				case "prev": this.current = this.list.length - 1; break;
+				case "next": this.current = 0;
+			}
+		}
+
+		for(let i = 0; i < this.list.length; ++i) {
+			if(this.current === i) {
+				this.list[i].getAttribute("class") !== "show" && this.list[i].setAttribute("class", "show " + direction);
+			} else {
+				this.list[i].getAttribute("class") !== "hide" && this.list[i].setAttribute("class", "hide");
+			}
+		}
+	}
+}
\ No newline at end of file
-- 
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