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ADFA-4977: Let the sidebar hold any number of items - #2095

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bugfix/ADFA-4977-sidebar-item-limit
Oct 5, 2026
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Daniel-ADFA merged 6 commits into
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bugfix/ADFA-4977-sidebar-item-limit

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@Daniel-ADFA

@Daniel-ADFA Daniel-ADFA commented Oct 2, 2026 •

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ADFA-4977

The editor crashed at launch once plugins contributed enough sidebar items. Plugins reserve sidebar slots when they load at app start, before the editor counts its own 7 items, so a plugin declaring 6 items passed the check and the 13th rail item threw. A plugin declaring more than 12 never loaded.

The sidebar no longer has a cap. IdeNavigationRailView puts its menu in a scroll view, so getMaxItemCount() returns Int.MAX_VALUE, and the 12-slot check in SidebarSlotManager and PluginManager is removed along with SidebarSlotExceededException. IdeSidebarService keeps its signatures and reports no limit. A plugin still cannot return more items than it declares. The plugin API changelog has a 26.41 entry.

The rail did not scroll on tablets or in landscape: their layouts give it a header, and Material then caps the menu at the space under the header. IdeNavigationRailView now places the scroll view below the header and keeps the menu at full height. Without a header, the last 8dp of the last item is now reachable too.

Review by commit: the first commit is a Spotless reformat of the three 4-space files only. Verified on an emulator in portrait and landscape at font scale 1.0 and 2.0.

The editor crashed at launch with "Maximum number of items supported by
IdeNavigationRailView is 12" once plugins contributed enough sidebar
items. Plugins reserve their declared plugin.sidebar_items when they
load at app start, but the editor only sets its built-in count (7) when
it opens, so each reservation was checked against 12 free slots rather
than 5. A plugin declaring 6 items passed the check and the 13th item
then threw in NavigationBarMenu.addInternal. A plugin declaring more
than 12 never loaded at all.

IdeNavigationRailView already scrolls its menu, so the 12 cap only
existed to satisfy Material's item check. getMaxItemCount() now returns
Int.MAX_VALUE, and the slot cap goes with it: SidebarSlotManager records
each plugin's declared count without rejecting it, PluginManager no
longer fails a plugin over sidebar slots, and SidebarSlotExceededException
is removed. IdeSidebarService keeps its signatures and reports no limit.
A plugin still may not return more items than it declares.

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coderabbitai Bot commented Oct 2, 2026 •

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Review in Change Stack →

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ℹ️ Recent review info
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Reviewing files that changed from the base of the PR and between e0f1e1e and ab35a0a.

📒 Files selected for processing (1)
  • docs/PLUGIN_API_CHANGELOG.md

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📝 Summary
  • Removed the 12-item sidebar limit. The navigation rail accepts up to Int.MAX_VALUE items and scrolls its menu within the available rail height.
  • Removed sidebar slot-capacity checks and SidebarSlotExceededException. Plugins can reserve their declared sidebar slots without a capacity check.
  • Updated IdeSidebarServiceImpl to report Int.MAX_VALUE for available and maximum sidebar items. canAddSidebarItems() returns true for any count. Plugins must still return no more items than they declared.
  • Added tests for navigation-rail scrolling, more than 12 items, and plugin reservations beyond the built-in item count.
  • Added a 26.41 plugin API changelog entry. Plugins that declare more than five sidebar items should set plugin.min_ide_version to at least 26.41.
  • Risk: Large item counts can increase UI and memory load.
  • Risk: canAddSidebarItems() returns true for negative counts. Callers must not use it to validate counts.
  • Test execution status was not provided.

Walkthrough

Sidebar slot reservations no longer enforce a fixed item limit. Plugin loading no longer checks capacity before reservation. The sidebar service reports unlimited capacity. The navigation rail scrolls to display declared items and adjusts its layout for a visible header.

Changes

Sidebar capacity

Layer / File(s) Summary
Plugin sidebar slot reservations
actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotExceededException.kt, actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotManager.kt, plugin-manager/src/main/kotlin/com/itsaky/androidide/plugins/manager/core/PluginManager.kt, plugin-manager/src/main/kotlin/com/itsaky/androidide/plugins/manager/services/IdeSidebarServiceImpl.kt, actions/src/test/java/com/itsaky/androidide/actions/SidebarSlotManagerTest.kt, plugin-manager/src/test/kotlin/com/itsaky/androidide/plugins/manager/services/IdeSidebarServiceImplTest.kt, docs/PLUGIN_API_CHANGELOG.md
Reservations accept positive slot counts without a capacity check. Plugin loading reserves declared slots directly. The sidebar service reports Int.MAX_VALUE for available slots and maximum items, and true for admission checks. Tests cover reservations above the former limit and unlimited service capacity. The changelog documents the API values and plugin version requirement.
Scrollable navigation rail
app/src/main/java/com/itsaky/androidide/ui/IdeNavigationRailView.kt, app/src/main/res/values/dimens.xml, app/src/test/java/com/itsaky/androidide/ui/IdeNavigationRailViewTest.kt
The navigation rail wraps its menu in a scroll view and sizes it below the visible header. A new 8dp top margin is used. Tests cover 21 items and scrolling with and without a header.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Suggested reviewers: jatezzz, dara-abijo-adfa

Merge Risk: 🔵 Low · up to ab35a

Very large plugin reservations can produce an incorrect sidebar count, but this is a narrow edge case without an established launch failure. The change is otherwise mergeable with follow-up.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 27 functions across 6 files. (1 skipped: 1… Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the main change: removing the sidebar item limit.
Description check ✅ Passed The description explains the sidebar limit, the scroll-view changes, and the related plugin API updates.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 27 functions across 6 files. (1 skipped: 1 unsupported.)

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A rabbit counts the items high
Then watches menus scroll nearby
The slots stretch past the old-known line
A header leaves the menu space to shine
The last item comes into view
The rabbit hops, pleased with the view

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at
@actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotManager.kt:
- Line 20: Update the sidebar reservation validation used by PluginManager so it
checks the complete built-in-plus-plugin item total using Long arithmetic before
accepting a reservation. Keep getReservedPluginSlotCount() and
getTotalItemCount() within the existing Int API contract, ensuring accepted
reservations cannot make the total overflow.

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ℹ️ Review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Essentials

Run ID: 21c40d24-5853-442d-a6f2-daa8fcffff69

📥 Commits

Reviewing files that changed from the base of the PR and between 785b7af and 9341fb8.

📒 Files selected for processing (9)
  • actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotExceededException.kt
  • actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotManager.kt
  • actions/src/test/java/com/itsaky/androidide/actions/SidebarSlotManagerTest.kt
  • app/src/main/java/com/itsaky/androidide/ui/IdeNavigationRailView.kt
  • app/src/test/java/com/itsaky/androidide/ui/IdeNavigationRailViewTest.kt
  • docs/PLUGIN_API_CHANGELOG.md
  • plugin-manager/src/main/kotlin/com/itsaky/androidide/plugins/manager/core/PluginManager.kt
  • plugin-manager/src/main/kotlin/com/itsaky/androidide/plugins/manager/services/IdeSidebarServiceImpl.kt
  • plugin-manager/src/test/kotlin/com/itsaky/androidide/plugins/manager/services/IdeSidebarServiceImplTest.kt
💤 Files with no reviewable changes (2)
  • actions/src/main/java/com/itsaky/androidide/actions/SidebarSlotExceededException.kt
  • plugin-manager/src/main/kotlin/com/itsaky/androidide/plugins/manager/core/PluginManager.kt

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@Daniel-ADFA
Daniel-ADFA requested a review from a team October 2, 2026 08:06
Tablet (sw600dp) and landscape layouts give the rail a header. With a
header, NavigationRailView.onMeasure measures the menu again, capped at
the height under the header, and onLayout shifts it below the header.
The menu now sits in a NestedScrollView, so the cap left the scroll view
nothing to scroll: items past the screen were cut off, and scrolled
items drew over the header. Without a header the rail still shifts the
menu down by its 8dp top margin, which the scroll range does not count,
so the last 8dp of the last item could never be scrolled into view.

IdeNavigationRailView now puts the scroll view below the header (or 8dp
from the top), measures it again after the rail caps the menu, and moves
the menu back to the top of the scroll view after the rail shifts it.
@Daniel-ADFA
Daniel-ADFA merged commit 57ee113 into stage Oct 5, 2026
5 checks passed
@Daniel-ADFA
Daniel-ADFA deleted the bugfix/ADFA-4977-sidebar-item-limit branch October 5, 2026 20:02
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3 participants