Detect "delete" key press

Also built a framework in view_mail.js to handle arbitrary keypresses.
This can be copied to other modules.

diff --git a/webcit-ng/static/js/view_mail.js b/webcit-ng/static/js/view_mail.js
index cd74cc73f1dbb7b7ed22f89f20b9e5c4d0b906c7..5312fe09bb40786d30bffc678b631ab623363c07 100644 (file)
--- a/webcit-ng/static/js/view_mail.js
+++ b/webcit-ng/static/js/view_mail.js
@@ -15,6 +15,27 @@ var newmail_notify = {
 };
 
 
+// Handler function for keypresses detected while the mail view is displayed.  Mainly for deleting messages.
+function mail_keypress(event) {
+
+       // If the "ctdl-mailbox-pane" no longer exists, the user has navigated to a different part of the site,
+       // so cancel the event listener.
+       try {
+               document.getElementById("ctdl-mailbox-pane").innerHTML;
+       }
+       catch {
+               document.removeEventListener("keydown", mail_keypress);
+               return;
+       }
+
+       const key = event.key.toLowerCase();
+       if (key == "delete") {
+               console.log("delete key was pressed (FIXME do something with this)");
+       }
+
+}
+
+
 // Render reply address for a message (FIXME figure out how to deal with "reply-to:")
 function reply_addr(msg) {
        //if (msg.locl) {
@@ -296,6 +317,7 @@ function render_mailbox_display(notify) {
 
                        box +=  "</table>";
                        document.getElementById("ctdl-mailbox-pane").innerHTML = box;
+                       document.addEventListener("keydown", mail_keypress);
                }
        }
        fetch_mailbox();