From e296baef8c4e185d3a149bddae82461b4147444a Mon Sep 17 00:00:00 2001
From: Hannes Braun <hannes@hannesbraun.net>
Date: Mon, 25 Nov 2024 20:51:36 +0100
Subject: [PATCH] Visualization: only scroll to the end of the stack

---
 media/programflow-visualization/webview.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/media/programflow-visualization/webview.js b/media/programflow-visualization/webview.js
index a72292fd..6e621e50 100644
--- a/media/programflow-visualization/webview.js
+++ b/media/programflow-visualization/webview.js
@@ -65,7 +65,18 @@ function updateVisualization(traceElem) {
   `;
   const viz = document.getElementById("viz");
   viz.innerHTML = data;
-  viz.scrollTo(0, viz.scrollHeight);
+
+  // Scroll to the end of the stack
+  const frames = document.getElementById("frames");
+  if (frames.lastElementChild !== null) {
+    const framesHeight = frames.lastElementChild.offsetTop + frames.lastElementChild.offsetHeight;
+    var y = framesHeight - viz.clientHeight;
+    if (y < 0) {
+      y = 0;
+    }
+    viz.scrollTo(0, y);
+  }
+
   const stdoutLog = document.getElementById("stdout-log");
   stdoutLog.innerHTML = traceElem[4];
   stdoutLog.scrollTo(0, stdoutLog.scrollHeight);