Use Mystic BBS with Telnet CP437 codepage

documentation/src/docs/documentation/help/howtos/use-mystic-bbs-telnet-cp437-character-translation.md

@@ -26,4 +26,4 @@ Host my-mystic-bbs-server-name
 ```
 
 You will now be able to enjoy your Mystic BBS system with the correct CP437 codepage :
-![isontheline maintainer of WebSSH](/images/md-content/dogtown-bbs-venice-ca-good-render.jpg)
+![isontheline maintainer of WebSSH](/images/md-content/dogtown-bbs-venice-ca-great-render.jpg)

src/ssh/assets/xterm-webssh.css

@@ -55,4 +55,8 @@ body {
 
 .xterm-decoration-overview-ruler {
     margin-right: 5px;
+}
+
+body.cp437 .xterm-dom-renderer-owner-1 .xterm-rows div {
+    margin-bottom: -1px;
 }

src/ssh/assets/xterm-webssh.js

@@ -402,6 +402,7 @@ const TerminalHelper = {
             cols: 80,
             fixedSize: false,
             handedness: 'right',
+            remoteCharacterSet: 'UTF-8',
         }
 
         if (fragment.fontSize) {
@@ -416,6 +417,10 @@ const TerminalHelper = {
             terminalSettings.isMacOS = true;
         }
 
+        if (fragment.remoteCharacterSet) {
+            terminalSettings.remoteCharacterSet = fragment.remoteCharacterSet;
+        }
+
         if (fragment.scrollback) {
             terminalSettings.scrollback = fragment.scrollback;
         }

src/ssh/assets/xterm.html

@@ -38,6 +38,11 @@
         // Platform :
         document.querySelector('body').classList.add(terminalSettings.isMacOS ? 'platform-macos' : 'platform-ios');
 
+        // CP437 "hack" :
+        if ('CP437' == terminalSettings.remoteCharacterSet) {
+            document.querySelector('body').classList.add('cp437');
+        }
+
         // Load Fit Addon :
         const fitAddon = new FitAddon.FitAddon();
         if (!terminalSettings.fixedSize) {