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fix: send Ctrl+L after tab switch to fix squished Claude display

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When switching between Claude session tabs, the terminal buffer was
rendered at a different size than the current terminal. This caused
Claude's banner to appear squished/corrupted.

Changes:
- Remove ANSI regex stripping that was breaking terminal output
- Send Ctrl+L after resize to trigger Claude CLI to redraw at correct size
- Only send Ctrl+L for Claude sessions, not shell sessions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
arkon
2026-01-19 07:54:30 +01:00
co-authored by Claude Opus 4.5
parent 5d1c60fd1a
commit c9094e6cf0
1 changed files with 5 additions and 26 deletions
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src/web/public/app.js
+5 -26
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@@ -562,32 +562,13 @@ class ClaudemanApp {
const res = await fetch(`/api/sessions/${sessionId}/terminal`);
const data = await res.json();
// Aggressively clear the terminal before switching sessions
// This ensures no residual content from previous display
this.terminal.clear();
this.terminal.reset();
if (data.terminalBuffer) {
// Strip leading ANSI escape sequences and whitespace to prevent gaps
// This handles:
// - CSI sequences: ESC [ (params) (final) - includes ? for private modes
// - OSC sequences: ESC ] ... BEL or ESC \
// - Simple sequences: ESC followed by single char
// - Whitespace, CR, LF
// - Screen initialization sequences
let cleanBuffer = data.terminalBuffer;
// First, strip any leading screen/terminal initialization artifacts
// Including cursor positioning that could leave blank space
cleanBuffer = cleanBuffer.replace(/^(\x1b\[[0-9;?]*[A-Za-z@`]|\x1b\][^\x07]*\x07|\x1b[()][AB012]|\x1b[=>DEMNOP78c]|\x1b[^\x1b]|\s|\r|\n)*/g, '');
// Also strip any DCS sequences (screen might send these)
cleanBuffer = cleanBuffer.replace(/^\x1bP[^\x1b]*\x1b\\/g, '');
this.terminal.write(cleanBuffer);
this.terminal.write(data.terminalBuffer);
}
// Send resize and trigger redraw
// Send resize and Ctrl+L to trigger Claude to redraw at correct size
const dims = this.fitAddon.proposeDimensions();
if (dims) {
await fetch(`/api/sessions/${sessionId}/resize`, {
@@ -595,15 +576,13 @@ class ClaudemanApp {
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ cols: dims.cols, rows: dims.rows })
});
// Send Ctrl+L to trigger Claude CLI to redraw at the new size
// This fixes the "squished" display when switching between tabs
// Send Ctrl+L to fix squished display after tab switch
const session = this.sessions.get(sessionId);
if (session && session.mode !== 'shell') {
await fetch(`/api/sessions/${sessionId}/input`, {
fetch(`/api/sessions/${sessionId}/input`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ input: '\x0c' }) // Ctrl+L
body: JSON.stringify({ input: '\x0c' })
});
}
}