From: Christopher Allan Webber <cwebber@dustycloud.org>
Date: Sat, 28 Jan 2017 18:18:23 +0000 (-0600)
Subject: Some scrolling tweaks
X-Git-Tag: fosdem-2017~67
X-Git-Url: https://jxself.org/git/?a=commitdiff_plain;h=614367c005e6ac1d547595c78fa194d44668a98d;p=mudsync.git

Some scrolling tweaks
---

diff --git a/data/web-static/js/mudsync.js b/data/web-static/js/mudsync.js
index 631fa89..cf340d5 100644
--- a/data/web-static/js/mudsync.js
+++ b/data/web-static/js/mudsync.js
@@ -18,27 +18,40 @@
 ;;; along with Mudsync.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-function displayMessage(data, self_sent) {
-    var new_entry = document.createElement("div");
+function scrollDown() {
+    var stream_metabox = document.getElementById("stream-metabox");
+    stream_metabox.scrollTop = stream_metabox.scrollHeight;
+}
+
+function withMaybeScroll(thunk) {
     var stream_metabox = document.getElementById("stream-metabox");
     var should_scroll = false;
     if(stream_metabox.scrollTop === (stream_metabox.scrollHeight
                                      - stream_metabox.offsetHeight)) {
         should_scroll = true;
     }
-    if (self_sent) {
-        new_entry.setAttribute("class", "stream-entry self-sent");
-        document.getElementById("main-input").value = "";
-    } else {
-        new_entry.setAttribute("class", "stream-entry");
-    }
-    new_entry.innerHTML = data;
-    document.getElementById("stream").appendChild(new_entry);
+    thunk();
     if (should_scroll) {
         stream_metabox.scrollTop = stream_metabox.scrollHeight;
     }
 }
 
+
+function displayMessage(data, self_sent) {
+    var new_entry = document.createElement("div");
+    withMaybeScroll(
+        function () {
+            if (self_sent) {
+                new_entry.setAttribute("class", "stream-entry self-sent");
+                document.getElementById("main-input").value = "";
+            } else {
+                new_entry.setAttribute("class", "stream-entry");
+            }
+            new_entry.innerHTML = data;
+            document.getElementById("stream").appendChild(new_entry);
+        });
+}
+
 function installWebsocket() {
     // TODO: Don't hardcode the websocket path; pull it from the DOM
     var address = "ws://".concat(window.location.hostname, ":", window.location.port);
@@ -62,7 +75,10 @@ function installUIHooks(ws) {
         var keyCode = e.keyCode || e.which;
         if (keyCode == '13') {
             var input_val = input.value;
-            displayMessage("> ".concat(input_val), true);
+            withMaybeScroll(
+                function () {
+                    displayMessage("> ".concat(input_val), true);
+                });
             sendMessageToServer(ws, input_val);
         }
     }
@@ -72,7 +88,7 @@ function sendMessageToServer(ws, data) {
     ws.send(data);
 }
 
-
 window.onload = function () {
     installWebsocket();
+    window.onresize = scrollDown;
 }