From 08a38bbf6143b1d60078526c80cd07474f26642d Mon Sep 17 00:00:00 2001
From: Eugene Pankov <e@ajenti.org>
Date: Sun, 12 Dec 2021 12:23:15 +0100
Subject: [PATCH] serial: slow feed mode - fixes #4901

---
 tabby-serial/src/api.ts                                  | 9 ++++++++-
 .../src/components/serialProfileSettings.component.pug   | 6 ++++++
 tabby-serial/src/profiles.ts                             | 1 +
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/tabby-serial/src/api.ts b/tabby-serial/src/api.ts
index 84b992e5..7fba2306 100644
--- a/tabby-serial/src/api.ts
+++ b/tabby-serial/src/api.ts
@@ -20,6 +20,7 @@ export interface SerialProfileOptions extends StreamProcessingOptions, LoginScri
     xon?: boolean
     xoff?: boolean
     xany?: boolean
+    slowSend?: boolean
 }
 
 export const BAUD_RATES = [
@@ -123,7 +124,13 @@ export class SerialSession extends BaseSession {
     }
 
     write (data: Buffer): void {
-        this.streamProcessor.feedFromTerminal(data)
+        if (!this.profile.options.slowSend) {
+            this.streamProcessor.feedFromTerminal(data)
+        } else {
+            for (const byte of data) {
+                this.streamProcessor.feedFromTerminal(Buffer.from([byte]))
+            }
+        }
     }
 
     async destroy (): Promise<void> {
diff --git a/tabby-serial/src/components/serialProfileSettings.component.pug b/tabby-serial/src/components/serialProfileSettings.component.pug
index cd7d86d1..60a79259 100644
--- a/tabby-serial/src/components/serialProfileSettings.component.pug
+++ b/tabby-serial/src/components/serialProfileSettings.component.pug
@@ -77,6 +77,12 @@ ul.nav-tabs(ngbNav, #nav='ngbNav')
                     .title Xany
                 toggle([(ngModel)]='profile.options.xany')
 
+            .form-line
+                .header
+                    .title Slow feed
+                    .description Sends data one byte at a time
+                toggle([(ngModel)]='profile.options.slowFeed')
+
     li(ngbNavItem)
         a(ngbNavLink) Login scripts
         ng-template(ngbNavContent)
diff --git a/tabby-serial/src/profiles.ts b/tabby-serial/src/profiles.ts
index e83ce488..d32e1d53 100644
--- a/tabby-serial/src/profiles.ts
+++ b/tabby-serial/src/profiles.ts
@@ -30,6 +30,7 @@ export class SerialProfilesService extends ProfileProvider<SerialProfile> {
             inputNewlines: null,
             outputNewlines: null,
             scripts: [],
+            slowSend: false,
         },
     }