fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
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Khrisseh1995:fix/diff-panel-scroll

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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
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fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995 wants to merge 1 commit into
pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
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Khrisseh1995:fix/diff-panel-scroll

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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

@t3-code

t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

1 participant

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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fix(web): preserve virtualized diff scrolling - #4526

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pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
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Khrisseh1995:fix/diff-panel-scroll

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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

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@Khrisseh1995
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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fix(web): preserve virtualized diff scrolling - #4526

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pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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Successfully merging this pull request may close these issues.

[Bug]: Large diff panel jumps and drifts while scrolling

1 participant

@Khrisseh1995
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
Skip to content

fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995 wants to merge 1 commit into
pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
Khrisseh1995 wants to merge 1 commit into
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Khrisseh1995:fix/diff-panel-scroll

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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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Review skipped

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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
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@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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@github-actionsgithub-actionsBot added vouch:unvouched PR author is not yet trusted in the VOUCHED list. size:XS 0-9 changed lines (additions + deletions). labels Jul 25, 2026
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Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995:fix/diff-panel-scroll
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fix(web): preserve virtualized diff scrolling#4526
Khrisseh1995 wants to merge 1 commit into
pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll

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@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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@github-actionsgithub-actionsBot added vouch:unvouched PR author is not yet trusted in the VOUCHED list. size:XS 0-9 changed lines (additions + deletions). labels Jul 25, 2026
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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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[Bug]: Large diff panel jumps and drifts while scrolling

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@Khrisseh1995
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
Skip to content

fix(web): preserve virtualized diff scrolling - #4526

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Khrisseh1995 wants to merge 1 commit into
pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll
Closed

fix(web): preserve virtualized diff scrolling#4526
Khrisseh1995 wants to merge 1 commit into
pingdotgg:mainfrom
Khrisseh1995:fix/diff-panel-scroll

Conversation

@Khrisseh1995

@Khrisseh1995Khrisseh1995 commented Jul 25, 2026

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Fixes#4525

What Changed

Conditionally apply the existing top: 0 and bottom: auto overrides when all diff files are collapsed.

Why

Commit 38cfc25 made the override unconditional. This prevents the virtualizer from positioning expanded diff content and causes scrolling to drift.

Removing the override entirely restores a gap above the all-collapsed file list, so keeping it conditional preserves both behaviours.

UI Changes

Before: expanded diffs drift behind the scrollbar as files are traversed.

After: expanded diffs follow the virtualizer while collapsed file headers remain aligned below the toolbar.

Collapsed Spacing Video:

collapsed-spacing-before-after.mp4

Virtual Scroll Video:

virtual-scroll-varied-lengths.mp4

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes (N/A: interaction-only; see videos)

Note

Low Risk
Single conditional class change in DiffPanel UI styling with no auth, data, or API impact.

Overview
Fixes virtualized diff scrolling in the diff panel by only applying the virtualizer top/bottom CSS overrides when all diff files are collapsed.

AnnotatableCodeView previously always included [&>div>div:last-child]:top-0! and bottom-auto!, which broke the virtualizer’s positioning for expanded files and caused scroll drift. Those classes are now added via cn() only when allDiffFilesCollapsed is true, so expanded diffs scroll correctly while the all-collapsed header layout stays aligned.

Reviewed by Cursor Bugbot for commit b71f197. Bugbot is set up for automated code reviews on this repo. Configure here.

Note

Fix diff render surface scroll position in non-collapsed state

The CSS overrides top:0 and bottom:auto on the last child of AnnotatableCodeView in DiffPanel.tsx were always applied, breaking scroll behavior when diff files are expanded. They are now conditional on allDiffFilesCollapsed, restoring correct virtualized scroll positioning in the non-collapsed state.

Macroscope summarized b71f197.

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@github-actionsgithub-actionsBot added vouch:unvouched PR author is not yet trusted in the VOUCHED list. size:XS 0-9 changed lines (additions + deletions). labels Jul 25, 2026
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Approvability

Verdict: Approved

Minor CSS fix that conditionally applies styling for virtualized diff scrolling. The change is self-contained to a className prop and only affects visual behavior when all diff files are collapsed.

You can customize Macroscope's approvability policy. Learn more.

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t3-codeBot commented Aug 1, 2026

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thanks! closing as superseded by #4724, merged in 3c50a64. that merged fix restores virtualizer positioning and corrects collapsed-list metrics.

@t3-codet3-codeBot closed this Aug 1, 2026
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Successfully merging this pull request may close these issues.

[Bug]: Large diff panel jumps and drifts while scrolling

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