Scroll to chat end button

3 files changed, 108 insertions, 45 deletions

diff --git a/res/client.js b/res/client.js
index 3f1bfd4..830c25c 100644
--- a/res/client.js
+++ b/res/client.js
@@ -1,4 +1,4 @@
-// Generated by Haxe 4.3.0
+// Generated by Haxe 4.3.1
 (function ($hx_exports, $global) { "use strict";
 $hx_exports["client"] = $hx_exports["client"] || {};
 $hx_exports["client"]["JsApi"] = $hx_exports["client"]["JsApi"] || {};
@@ -536,6 +536,27 @@ client_Buttons.init = function(main) {
 			child.removeAttribute("data-src");
 		}
 	};
+	var scrollToChatEndBtn = window.document.querySelector("#scroll-to-chat-end");
+	var scrollToChatEndBtnAnim = function() {
+		if(scrollToChatEndBtn.style.opacity == "0") {
+			return;
+		}
+		scrollToChatEndBtn.style.opacity = "0";
+		scrollToChatEndBtn.addEventListener("transitionend",function(e) {
+			return scrollToChatEndBtn.style.display = "none";
+		},{ once : true});
+	};
+	scrollToChatEndBtn.onclick = function(e) {
+		main.scrollChatToEnd();
+		scrollToChatEndBtnAnim();
+	};
+	var msgBuf = window.document.querySelector("#messagebuffer");
+	msgBuf.onscroll = function(e) {
+		if(msgBuf.offsetHeight + msgBuf.scrollTop < msgBuf.scrollHeight - 1) {
+			return;
+		}
+		scrollToChatEndBtnAnim();
+	};
 	window.document.querySelector("#clearchatbtn").onclick = function(e) {
 		if((main.personal.group & 8) != 0) {
 			main.send({ type : "ClearChat"});
@@ -1178,6 +1199,7 @@ var client_Main = function() {
 	this.forceSyncNextTick = false;
 	this.isSyncActive = true;
 	var _gthis = this;
+	haxe_Log.trace = client_Utils.nativeTrace;
 	this.player = new client_Player(this);
 	this.host = $global.location.hostname;
 	if(this.host == "") {
@@ -1206,22 +1228,6 @@ client_Main.__name__ = true;
 client_Main.main = function() {
 	new client_Main();
 };
-client_Main.chatMessageConnected = function() {
-	var div = window.document.createElement("div");
-	div.className = "server-msg-reconnect";
-	div.textContent = Lang.get("msgConnected");
-	var msgBuf = window.document.querySelector("#messagebuffer");
-	msgBuf.appendChild(div);
-	msgBuf.scrollTop = msgBuf.scrollHeight;
-};
-client_Main.chatMessageDisconnected = function() {
-	var div = window.document.createElement("div");
-	div.className = "server-msg-disconnect";
-	div.textContent = Lang.get("msgDisconnected");
-	var msgBuf = window.document.querySelector("#messagebuffer");
-	msgBuf.appendChild(div);
-	msgBuf.scrollTop = msgBuf.scrollHeight;
-};
 client_Main.serverMessage = function(text,isText,withTimestamp) {
 	if(withTimestamp == null) {
 		withTimestamp = true;
@@ -1283,12 +1289,12 @@ client_Main.prototype = {
 		this.ws = new WebSocket("" + protocol + "//" + this.host + colonPort + path);
 		this.ws.onmessage = $bind(this,this.onMessage);
 		this.ws.onopen = function() {
-			client_Main.chatMessageConnected();
+			_gthis.chatMessageConnected();
 			return _gthis.isConnected = true;
 		};
 		this.ws.onclose = function() {
 			if(_gthis.isConnected) {
-				client_Main.chatMessageDisconnected();
+				_gthis.chatMessageDisconnected();
 			}
 			_gthis.isConnected = false;
 			_gthis.player.pause();
@@ -1515,7 +1521,7 @@ client_Main.prototype = {
 		var data = JSON.parse(e.data);
 		if(this.config != null && this.config.isVerbose) {
 			var t = data.type;
-			haxe_Log.trace("Event: " + data.type,{ fileName : "src/client/Main.hx", lineNumber : 397, className : "client.Main", methodName : "onMessage", customParams : [Reflect.field(data,t.charAt(0).toLowerCase() + HxOverrides.substr(t,1,null))]});
+			haxe_Log.trace("Event: " + data.type,{ fileName : "src/client/Main.hx", lineNumber : 398, className : "client.Main", methodName : "onMessage", customParams : [Reflect.field(data,t.charAt(0).toLowerCase() + HxOverrides.substr(t,1,null))]});
 		}
 		client_JsApi.fireOnceEvent(data);
 		switch(data.type) {
@@ -1732,7 +1738,7 @@ client_Main.prototype = {
 		this.setLeaderButton((this.personal.group & 4) != 0);
 		this.setPlaylistLock(connected.isPlaylistOpen);
 		this.clearChat();
-		client_Main.chatMessageConnected();
+		this.chatMessageConnected();
 		var _g = 0;
 		var _g1 = connected.history;
 		while(_g < _g1.length) {
@@ -1948,6 +1954,20 @@ client_Main.prototype = {
 		}
 		this.ws.send(JSON.stringify(data));
 	}
+	,chatMessageConnected: function() {
+		var div = window.document.createElement("div");
+		div.className = "server-msg-reconnect";
+		div.textContent = Lang.get("msgConnected");
+		window.document.querySelector("#messagebuffer").appendChild(div);
+		this.scrollChatToEnd();
+	}
+	,chatMessageDisconnected: function() {
+		var div = window.document.createElement("div");
+		div.className = "server-msg-disconnect";
+		div.textContent = Lang.get("msgDisconnected");
+		window.document.querySelector("#messagebuffer").appendChild(div);
+		this.scrollChatToEnd();
+	}
 	,updateUserList: function() {
 		window.document.querySelector("#usercount").textContent = this.clients.length + " " + Lang.get("online");
 		window.document.title = this.getPageTitle();
@@ -2009,7 +2029,7 @@ client_Main.prototype = {
 			text = text.replace(filter.regex.r,filter.replace);
 		}
 		textDiv.innerHTML = text;
-		var isInChatEnd = msgBuf.scrollTop + msgBuf.clientHeight >= msgBuf.scrollHeight - 1;
+		var isInChatEnd = msgBuf.scrollTop + msgBuf.clientHeight >= msgBuf.scrollHeight - 50;
 		if(isInChatEnd) {
 			var _g = 0;
 			var _g1 = textDiv.getElementsByTagName("img");
@@ -2025,18 +2045,29 @@ client_Main.prototype = {
 		msgBuf.appendChild(userDiv);
 		if(isInChatEnd) {
 			while(msgBuf.children.length > 200) msgBuf.removeChild(msgBuf.firstChild);
-			msgBuf.scrollTop = msgBuf.scrollHeight;
 		}
-		if(name == this.personal.name) {
-			msgBuf.scrollTop = msgBuf.scrollHeight;
+		if(isInChatEnd || name == this.personal.name) {
+			this.scrollChatToEnd();
+		} else {
+			this.showScrollToChatEndBtn();
 		}
 		if(this.onBlinkTab == null) {
 			this.blinkTabWithTitle("*Chat*");
 		}
 	}
+	,showScrollToChatEndBtn: function() {
+		var btn = window.document.querySelector("#scroll-to-chat-end");
+		btn.style.display = "block";
+		haxe_Timer.delay(function() {
+			btn.style.opacity = "1";
+		},0);
+	}
 	,onChatImageLoaded: function(e) {
 		this.scrollChatToEnd();
 		e.target.onload = null;
+		var btn = window.document.querySelector("#scroll-to-chat-end");
+		btn.style.opacity = "0";
+		btn.style.display = "none";
 	}
 	,onChatVideoLoaded: function(e) {
 		var el = e.target;
@@ -2757,6 +2788,13 @@ client_Settings.write = function(data) {
 };
 var client_Utils = function() { };
 client_Utils.__name__ = true;
+client_Utils.nativeTrace = function(msg,infos) {
+	var args = ["" + infos.fileName + ":" + infos.lineNumber,msg];
+	if(infos.customParams != null) {
+		args = args.concat(infos.customParams);
+	}
+	($_=window.console,$_.log.apply($_,args));
+};
 client_Utils.isTouch = function() {
 	return 'ontouchstart' in window;
 };
diff --git a/res/css/des.css b/res/css/des.css
index 968ad39..89ab857 100644
--- a/res/css/des.css
+++ b/res/css/des.css
@@ -7,6 +7,7 @@
 :root {
   --background-video: #000;
   --background-chat: #111;
+  --scroll-to-end-bg: #fff;
   --midground: #888;
   --foreground: #bbb;
   --accent: #0055ff;
@@ -646,8 +647,27 @@ footer#footer {
   font-style: italic;
 }
 
+#scroll-to-chat-end {
+  transition: opacity 200ms;
+  position: absolute;
+  margin-left: auto;
+  top: -4em;
+  right: 1em;
+  padding: 0.8em;
+  border-radius: 50%;
+  background-color: var(--scroll-to-end-bg);
+}
+
+#scroll-to-chat-end ion-icon {
+  color: var(--midground);
+}
+
 /* Chat input */
 
+#chat-inputs-wrapper {
+  position: relative;
+}
+
 #chatbox {
   padding-top: 1rem;
   border-top: .063rem solid;
diff --git a/res/index.html b/res/index.html
index 6310f8b..9ab9d03 100644
--- a/res/index.html
+++ b/res/index.html
@@ -185,29 +185,34 @@
     </ul>
     <!-- Messages -->
     <div id="messagebuffer"></div>
-    <!-- Message input -->
-    <div id="chatbox">
-      <input id="chatline" type="text" placeholder="${chatlinePlaceholder}">
-      <button id="smilesbtn" title="${emotes}">
-        <ion-icon name="happy"></ion-icon>
+    <div id="chat-inputs-wrapper">
+      <button id="scroll-to-chat-end" style="display: none; opacity: 0;" class="active">
+        <ion-icon name="arrow-down" role="img" class="md hydrated" aria-label="arrow down"></ion-icon>
       </button>
-    </div>
-    <div id="smiles-wrap" class="collapsible">
-      <div id="smiles-list"></div>
-    </div>
-    <!-- Guest login -->
-    <div id="guestlogin" style="display: none;">
-      <label>${enterAsGuest}</label>
-      <input id="guestname" type="text" placeholder="${yourName}">
-    </div>
-    <div id="guestpassword" style="display: none;">
-      <label>${enterUserPassword}</label>
-      <div id="passwordbox">
-        <input id="guestpass" type="text" placeholder="${yourPassword}">
-        <button id="guestpass_icon">
-          <ion-icon name="eye"></ion-icon>
+      <!-- Message input -->
+      <div id="chatbox">
+        <input id="chatline" type="text" placeholder="${chatlinePlaceholder}">
+        <button id="smilesbtn" title="${emotes}">
+          <ion-icon name="happy"></ion-icon>
         </button>
       </div>
+      <div id="smiles-wrap" class="collapsible">
+        <div id="smiles-list"></div>
+      </div>
+      <!-- Guest login -->
+      <div id="guestlogin" style="display: none;">
+        <label>${enterAsGuest}</label>
+        <input id="guestname" type="text" placeholder="${yourName}">
+      </div>
+      <div id="guestpassword" style="display: none;">
+        <label>${enterUserPassword}</label>
+        <div id="passwordbox">
+          <input id="guestpass" type="text" placeholder="${yourPassword}">
+          <button id="guestpass_icon">
+            <ion-icon name="eye"></ion-icon>
+          </button>
+        </div>
+      </div>
     </div>
   </aside>