Double-click hidden-section gutter button to fully expand the section

[bradleyjames]

Describe the solution you'd like?

When the Code Review panel's diff editor has a large hidden context section, the user has to click the gutter expand button multiple times — once per 25 lines — to reveal the whole thing. Add double-click as a shortcut: double-clicking the gutter expand button fully expands the hidden section in one action.

Single-click keeps the existing chunked behavior so users can still choose to reveal a little at a time.

Is your feature request related to a problem? Please describe.

For hunks separated by hundreds of unchanged lines (or hidden regions at the top/bottom of a file), users currently click 4–10 times to see all the context between or around hunks. There's no keyboard shortcut and no "expand all" affordance at the gutter level.

Additional context

• macOS / Windows / Linux all conventionally use double-click for "do the maximum version of this gesture" on similar controls.
• The chunked single-click behavior should remain as the granular option.
• Adjacent gutter interactions (diff-hunk sliver toggle, add-context, revert) shouldn't change.

Operating system (OS)

macOS, Windows, Linux

How important is this feature to you?

3 (Moderate)

[oz-for-oss]

@bradleyjames

Here's what I found while triaging this issue:

This is a clear enhancement request for the Code Review diff gutter. The current behavior appears to be incremental by design, and the requested double-click gesture would add a full-expand shortcut without changing single-click behavior.

Maintainer details

I concluded that feature request to add a double-click full-expand shortcut for hidden context sections in the Code Review diff gutter while preserving single-click chunk expansion..

Triage summary

This is a clear Code Review enhancement request: add a double-click gesture on hidden-section gutter expansion controls to reveal the entire hidden range, while preserving the existing single-click incremental expansion.

Code findings

• Hidden diff sections render gutter controls in app/src/code/editor/element.rs, with hidden sections represented as GutterElementType::HiddenSection { expansion_type }.
• The wrapper currently handles hidden-section activation through LeftMouseDown/LeftMouseUp and dispatches CodeEditorViewAction::HiddenSectionExpansion from app/src/code/editor/view.rs without passing click-count information.
• expand_hidden_section in app/src/code/editor/view.rs expands ExpansionType::ExpandDown / ExpandUp by CODE_EDITOR_HIDDEN_SECTION_EXPANSION_LINES (25) and expands the full range only for ExpansionType::Both.
• crates/warpui_core/src/event.rs already carries click_count on Event::LeftMouseDown, so the likely implementation path is to preserve the current single-click flow and map double-clicks on a hidden-section gutter control to a full-range expansion.
• app/src/code_review/code_review_view.rs already listens for CodeEditorEvent::HiddenSectionExpanded and invalidates the file row height, so the existing parent refresh path should remain applicable.

Duplicate check

I enumerated open issues and found related but not matching requests such as #4998 (general git diff context expansion) and #9129 (expand/collapse all file diffs). They do not specifically request double-click full expansion of hidden-section gutter controls, and fewer than two likely duplicates were found.

This is my automated analysis and may be incorrect. A maintainer will verify the details.

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[bradleyjames]

@oz-agent , PR is here: #11621

[oz-for-oss]

@bradleyjames

Here's what I found while triaging this issue:

This is a clear feature request for the Code Review diff editor. #11621 is already open to add the double-click full-expansion shortcut while preserving single-click incremental expansion.

Maintainer details

I concluded that feature request to fully expand large Code Review hidden diff sections on double-click while preserving the existing single-click incremental expansion..

Triage

This is a feature request for the Code Review diff editor hidden-section gutter: keep single-click as the existing incremental reveal, and add double-click as a shortcut to reveal the full hidden section in one action.

Routing: Code Review diff UI.

Reproducibility: High. The current implementation uses CODE_EDITOR_HIDDEN_SECTION_EXPANSION_LINES (25) for directional ExpandUp / ExpandDown hidden-section expansion, so long hidden sections are expected to require repeated clicks.

Likely implementation area: EditorWrapper::dispatch_event currently recognizes gutter clicks via mouse down/up state but does not pass click-count or double-click intent to the click handler. CodeEditorViewAction::HiddenSectionExpansion and CodeEditorView::expand_hidden_section only distinguish the expansion direction, so a full-range expansion path would need to be added without changing adjacent diff-hunk, add-context, revert, or comment gutter interactions.

Duplicate check: I enumerated open issues and recently closed issues. #9129 is a broader Code Review file diff collapse/expand-all request and #10099 is a hidden-section recomputation bug after reverting a hunk; neither matches this exact double-click hidden-section gutter shortcut. #11621 is an open PR that references this issue.

This is my automated analysis and may be incorrect. A maintainer will verify the details.

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