fix(v3/darwin): add FullscreenButtonState and resolve NSWindowZoomButton conflict by leaanthony · Pull Request #5319 · wailsapp/wails

leaanthony · 2026-05-03T13:22:10Z

Summary

Adds FullscreenButtonState ButtonState to WebviewWindowOptions (after CloseButtonState)
On macOS, both MaximiseButtonState and FullscreenButtonState target NSWindowZoomButton (the green traffic-light button). run() now computes max(MaximiseButtonState, FullscreenButtonState) and applies it once — eliminating the silent last-writer-wins override reported in the PR docs: add v2 feature status reference page #5314 code review.
setFullscreenButtonState is added to the webviewWindowImpl interface; macOS delegates to setMaximiseButtonState; all other platforms are no-ops (Windows has no dedicated fullscreen button in the standard title bar; Linux/iOS/Android have no such button).

Reproducer

Setting MaximiseButtonState: ButtonDisabled alongside FullscreenButtonState: ButtonEnabled (the zero-value default) previously re-enabled the zoom button because setFullscreenButtonState ran after setMaximiseButtonState and both called setMaximiseButtonState on the same NSWindowZoomButton.

Test plan

Build a macOS app with MaximiseButtonState: ButtonDisabled only — green button should be greyed out
Build with FullscreenButtonState: ButtonHidden only — green button should be hidden
Build with both MaximiseButtonState: ButtonDisabled, FullscreenButtonState: ButtonHidden — green button should be hidden (more restrictive wins)
Build with both MaximiseButtonState: ButtonHidden, FullscreenButtonState: ButtonDisabled — green button should be hidden (more restrictive wins)
Default (both ButtonEnabled) — green button behaves normally
go vet ./v3/pkg/application/... passes

Addresses review comment #5314 (comment)

🤖 Generated with Claude Code

Summary by CodeRabbit

New Features
- Added FullscreenButtonState configuration option to control the fullscreen button behavior on macOS webview windows.
Documentation
- Updated customization guide explaining fullscreen button functionality and its interaction with the maximize button on macOS.

…ton conflict On macOS both MaximiseButtonState and FullscreenButtonState control NSWindowZoomButton (the green traffic-light button). Previously calling setMaximiseButtonState and then setFullscreenButtonState in run() would cause the later call to silently win. Adds WebviewWindowOptions.FullscreenButtonState (ButtonState) and wires it into the interface across all platforms. On macOS, run() now computes the more restrictive of the two states (higher ButtonState value) and applies it once, eliminating the last-writer-wins race. setFullscreenButtonState on macOS delegates to setMaximiseButtonState since they target the same native button. All other platforms are no-ops. Addresses review comment on PR #5314. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Co-authored-by: multica-agent <github@multica.ai>

coderabbitai · 2026-05-03T13:22:32Z

Walkthrough

This PR adds fullscreen button state control to the Wails window API. A new FullscreenButtonState field is added to WebviewWindowOptions and implemented on each platform: macOS delegates it to the existing zoom button handler with logic to compute the effective state, Windows provides a no-op implementation. Documentation explains the shared zoom button behavior on macOS and platform differences.

Changes

Fullscreen Button State API

Layer / File(s)	Summary
Add FullscreenButtonState to options contract `v3/pkg/application/webview_window_options.go`	`FullscreenButtonState` field added to `WebviewWindowOptions` to control the fullscreen/zoom button alongside existing button state options.
Platform-specific FullscreenButtonState implementations `v3/pkg/application/webview_window_darwin.go`, `v3/pkg/application/webview_window_windows.go`	macOS computes effective zoom state from both `MaximiseButtonState` and `FullscreenButtonState`, applying the more restrictive value at initialization, and delegates the setter to the zoom button handler. Windows implements a no-op setter.
Documentation and usage examples `docs/src/content/docs/guides/customising-windows.mdx`	Guide updated with window creation and runtime examples showing `FullscreenButtonState` usage. New macOS section explains the shared zoom button and initialization precedence. Platform differences table and Windows notes revised to document fullscreen button behavior per platform.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

wailsapp/wails#5224: Adds FullscreenButtonState handling to macOS window initialization with the same zoom button delegation and state calculation logic.

Suggested labels

MacOS, Windows, v3-alpha, size:M, Documentation

Suggested reviewers

flofreud

Poem

🐰 A button so green on the macOS scene,
Now shares its glory with fullscreen gleam!
Darwin calculates which state runs deep,
While Windows just naps—a no-op so sweet.
From options to widgets, the flow's now complete! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The PR description is well-structured with summary, reproducer, and test plan, but is missing required template sections like issue reference and type of change checkboxes.	Add 'Fixes #' reference, complete the 'Type of change' checklist, and fill in the 'How Has This Been Tested?' section with actual test results and environment details.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main changes: adding FullscreenButtonState and resolving the NSWindowZoomButton conflict on macOS.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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Commit unit tests in branch agent/engineer-mac/d332c3e8

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Copilot

Pull request overview

This PR adds a new FullscreenButtonState window option in the v3 application package and updates the macOS window bootstrap path so the green traffic-light button no longer suffers from the MaximiseButtonState/fullscreen conflict on NSWindowZoomButton. It fits into the cross-platform windowing layer by extending the shared window option model and adding platform-specific no-op implementations where the concept does not apply.

Changes:

Add FullscreenButtonState to WebviewWindowOptions with macOS-specific semantics and no-op behavior elsewhere.
Update macOS window initialization to resolve MaximiseButtonState and FullscreenButtonState into a single effective zoom-button state.
Extend platform window implementations with a setFullscreenButtonState method so all backends satisfy the internal interface.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
`v3/pkg/application/webview_window_windows.go`	Adds Windows no-op implementation for fullscreen button state.
`v3/pkg/application/webview_window_options.go`	Adds the new `FullscreenButtonState` option and its API comment.
`v3/pkg/application/webview_window_linux.go`	Adds Linux no-op implementation for fullscreen button state.
`v3/pkg/application/webview_window_ios.go`	Adds iOS no-op implementation for fullscreen button state.
`v3/pkg/application/webview_window_darwin.go`	Implements macOS zoom-button conflict handling and adds fullscreen-state delegation.
`v3/pkg/application/webview_window_android.go`	Adds Android no-op implementation for fullscreen button state.
`v3/pkg/application/webview_window.go`	Extends the internal `webviewWindowImpl` interface with fullscreen button state support.
`v3/pkg/application/application_server.go`	Adds server-mode no-op implementation for fullscreen button state.

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

Three issues addressed: 1. Runtime path: setMaximiseButtonState and setFullscreenButtonState on macOS now both read from w.parent.options and apply effectiveZoomButtonState (max of the two stored states). A runtime call to SetMaximiseButtonState can no longer override a FullscreenButtonState restriction, and vice versa, because the impl always reconciles both fields rather than trusting the single argument passed in. 2. setFullscreenButtonState no longer writes directly; it reconciles with w.parent.options.MaximiseButtonState before calling C.setMaximiseButtonState, making the two setters order-independent. 3. Adds TestEffectiveZoomButtonState covering all ButtonState combinations including the default-does-not-override-restriction cases that the original bug exhibited. Also adds SetFullscreenButtonState to WebviewWindow, Window interface, and BrowserWindow to complete the public API surface. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Co-authored-by: multica-agent <github@multica.ai>

taliesin-ai · 2026-05-15T13:17:06Z

All three Copilot review issues are now addressed. Replies have been posted to each thread. The fixes are verified: go vet clean, TestEffectiveZoomButtonState 13/13 pass.

Summary of changes:

1. Add effectiveZoomButtonState helper (webview_window_options.go):

func effectiveZoomButtonState(a, b ButtonState) ButtonState {
    if b > a { return b }
    return a
}

2. Fix runtime path for both setters (webview_window_darwin.go):

func (w *macosWebviewWindow) setMaximiseButtonState(state ButtonState) {
    C.setMaximiseButtonState(w.nsWindow, C.int(effectiveZoomButtonState(state, w.parent.options.FullscreenButtonState)))
}
func (w *macosWebviewWindow) setFullscreenButtonState(state ButtonState) {
    C.setMaximiseButtonState(w.nsWindow, C.int(effectiveZoomButtonState(state, w.parent.options.MaximiseButtonState)))
}

3. Simplify run() startup — inline reconciliation removed since the setters now handle it:

w.setMaximiseButtonState(options.MaximiseButtonState)

4. Add SetFullscreenButtonState to Window interface, WebviewWindow, and BrowserWindow

5. Add TestEffectiveZoomButtonState (13 subtests covering all ButtonState combinations plus commutativity)

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T16:36:19Z

All three review threads raised here are now addressed in PR #5455, which applies the fix against current master.

What the threads identified (and what was fixed)

Thread 1 — SetMaximiseButtonState at runtime overrides FullscreenButtonState
setMaximiseButtonState now calls effectiveZoomButtonState(state, w.parent.options.FullscreenButtonState) before writing to NSWindowZoomButton. A runtime call can no longer silently un-disable/un-hide a zoom button that FullscreenButtonState had restricted.

Thread 2 — setFullscreenButtonState wrote directly without reconciling
setFullscreenButtonState now calls effectiveZoomButtonState(state, w.parent.options.MaximiseButtonState) before writing. Both setters are now fully order-independent.

Thread 3 — No automated test for the precedence rule
TestEffectiveZoomButtonState added: 13 subtests covering every ButtonState combination plus commutativity verification.

Additional: startup path corrected

The if options.FullscreenButtonState != ButtonEnabled guard in run() was incorrect — it skipped setFullscreenButtonState when the value was ButtonEnabled, so a later runtime call to SetFullscreenButtonState(ButtonEnabled) could silently un-grey a button that MaximiseButtonState: ButtonDisabled had greyed out. Since the setters now handle reconciliation internally, the guard is removed and a single setMaximiseButtonState call at startup is sufficient.

Verification

go vet ./pkg/application/... — clean
TestEffectiveZoomButtonState — 13/13 PASS

PR: #5455

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T16:54:09Z

The three Copilot review issues raised here have been addressed in a clean PR against current master:

PR #5457: #5457

What was done

This PR (#5319) is now 149 commits behind master and is no longer mergeable — FullscreenButtonState was independently merged via #5224 during that time. PR #5457 applies the reconciliation fix on top of current master.

Thread 1 & 2 — runtime setMaximiseButtonState/setFullscreenButtonState override each other

Both setMaximiseButtonState and setFullscreenButtonState now call effectiveZoomButtonState(state, w.parent.options.{other}) before writing to NSWindowZoomButton. The more restrictive of the two (Hidden > Disabled > Enabled) always wins, regardless of call order.

Thread 3 — no automated test for precedence rule

TestEffectiveZoomButtonState added with 13 subtests covering all ButtonState combinations and commutativity.

Startup path — the if options.FullscreenButtonState != ButtonEnabled guard removed; reconciliation happens inside the setters, not at the call site.

Verification

go vet ./v3/pkg/application/... — clean
TestEffectiveZoomButtonState — 13/13 PASS

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T17:23:56Z

Status: Superseded by PR #5457

This PR is 149 commits behind master and cannot be cleanly merged. The three Copilot review threads flagged here (effectiveZoomButtonState reconciliation, runtime SetMaximiseButtonState override, and missing automated tests) have been resolved in a new PR built from current master:

→ PR #5457: #5457

PR #5457 contains:

effectiveZoomButtonState(a, b ButtonState) ButtonState helper (Hidden > Disabled > Enabled)
setMaximiseButtonState calls effectiveZoomButtonState(state, w.parent.options.FullscreenButtonState)
setFullscreenButtonState calls effectiveZoomButtonState(state, w.parent.options.MaximiseButtonState)
TestEffectiveZoomButtonState — 13/13 PASS, covering all ButtonState combinations + commutativity
go vet ./v3/pkg/application/... — clean

Please close this PR as superseded by #5457. The unresolved review threads here are blocking an automated monitor from recognising the work as complete.

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T22:12:53Z

Status: Superseded by PR #5457

This PR is 149+ commits behind master and cannot be merged. The fix for all three Copilot review concerns has been implemented and verified in PR #5457: #5457

The three issues raised by Copilot are resolved in #5457:

effectiveZoomButtonState(a, b ButtonState) helper added (Hidden > Disabled > Enabled ordering)
setMaximiseButtonState reconciles with FullscreenButtonState at runtime — no more last-writer-wins
setFullscreenButtonState reconciles with MaximiseButtonState — both setters are order-independent
TestEffectiveZoomButtonState — 13/13 PASS, go vet clean

Please close this PR — it is superseded by #5457. The automated PR watcher keeps re-triggering a fix cycle because this PR's Copilot threads remain open.

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T22:44:14Z

Action required: please close this PR

This PR is superseded by #5457 (#5457), which applies the same effectiveZoomButtonState fix cleanly against current master.

The 3 Copilot review threads on this PR cannot be resolved by the agent — GitHub only allows "Resolve conversation" via the web UI. Because those threads remain open, the automated PR watcher keeps re-triggering this issue.

Please close PR #5319 as superseded by #5457. No code changes needed — the fix is already in #5457 and verified:

go vet ./v3/pkg/application/... — clean
TestEffectiveZoomButtonState — 13/13 PASS

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

taliesin-ai · 2026-05-15T23:17:27Z

This PR is superseded by #5457 (#5457), which applies the same effectiveZoomButtonState reconciliation fix against current master and is ready to merge.

The three Copilot review concerns from this PR are addressed in #5457:

setMaximiseButtonState now reconciles with FullscreenButtonState at runtime
setFullscreenButtonState now reconciles with MaximiseButtonState at runtime
TestEffectiveZoomButtonState covers all 13 ButtonState combinations

Please close this PR and merge #5457.

CC @leaanthony

Taliesin is an AI agent. CC @leaanthony

Resolves conflicts caused by #5224 (FullscreenButtonState landed on master) while preserving the macOS NSWindowZoomButton override fix from this PR: - run() applies max(MaximiseButtonState, FullscreenButtonState) once, instead of the "skip if default" workaround from master. - macOS keeps a single setFullscreenButtonState (deduped against master's copy); behavior is unchanged since both C helpers target NSWindowZoomButton. - Windows: setFullscreenButtonState is a no-op (no dedicated fullscreen button in the standard title bar). The dead "if != ButtonEnabled" guard in Windows run() has been removed. - iOS / Android: deduped against master's existing stubs. Docs: customising-windows.mdx now documents FullscreenButtonState, the runtime setter, the macOS shared-button semantics, and the Windows no-op.

coderabbitai

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

docs/src/content/docs/guides/customising-windows.mdx (1)

65-66: ⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Update explanation to include FullscreenButtonState.

The example code on lines 55-58 now shows four button states (including FullscreenButtonState: application.ButtonEnabled), but the explanation only describes the first three.

📝 Proposed fix

-In the example above, the minimise button is hidden, the maximise button is
-inactive (grayed out), and the close button is active.
+In the example above, the minimise button is hidden, the maximise button is
+inactive (grayed out), the close button is active, and the fullscreen button 
+is active.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@docs/src/content/docs/guides/customising-windows.mdx` around lines 65 - 66,
The docs text describes three window button states but the example now sets a
fourth property FullscreenButtonState (set to application.ButtonEnabled); update
the explanatory sentence to mention the fullscreen button as well and state that
FullscreenButtonState is enabled (application.ButtonEnabled) while the minimise
button is hidden, the maximise button is inactive (grayed out), and the close
button is active. Ensure you reference FullscreenButtonState and
application.ButtonEnabled in the updated explanation so it matches the example
code.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Outside diff comments:
In `@docs/src/content/docs/guides/customising-windows.mdx`:
- Around line 65-66: The docs text describes three window button states but the
example now sets a fourth property FullscreenButtonState (set to
application.ButtonEnabled); update the explanatory sentence to mention the
fullscreen button as well and state that FullscreenButtonState is enabled
(application.ButtonEnabled) while the minimise button is hidden, the maximise
button is inactive (grayed out), and the close button is active. Ensure you
reference FullscreenButtonState and application.ButtonEnabled in the updated
explanation so it matches the example code.

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📥 Commits

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📒 Files selected for processing (1)

docs/src/content/docs/guides/customising-windows.mdx

…ngelog for #5319 (#5467)

Copilot AI review requested due to automatic review settings May 3, 2026 13:22

Copilot started reviewing on behalf of leaanthony May 3, 2026 13:22 View session

Copilot AI reviewed May 3, 2026

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Comment thread v3/pkg/application/webview_window_darwin.go

Comment thread v3/pkg/application/webview_window_darwin.go Outdated

Comment thread v3/pkg/application/webview_window_darwin.go

taliesin-ai mentioned this pull request May 4, 2026

fix(v3/darwin): FullscreenButtonState with full Copilot feedback applied taliesin-ai/wails#1

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leaanthony added the reviewed ✅ label May 4, 2026

taliesin-ai mentioned this pull request May 15, 2026

fix(v3/darwin): add effectiveZoomButtonState and fix runtime NSWindowZoomButton conflict #5455

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taliesin-ai mentioned this pull request May 15, 2026

fix(v3/darwin): add effectiveZoomButtonState to resolve NSWindowZoomButton conflict #5457

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coderabbitai Bot reviewed May 16, 2026

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leaanthony enabled auto-merge (squash) May 16, 2026 01:21

leaanthony disabled auto-merge May 16, 2026 01:29

leaanthony merged commit c4ac701 into master May 16, 2026
71 of 72 checks passed

leaanthony deleted the agent/engineer-mac/d332c3e8 branch May 16, 2026 01:30

taliesin-ai mentioned this pull request May 16, 2026

fix(v3/darwin): runtime effectiveZoomButtonState reconciliation + changelog for #5319 #5467

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leaanthony pushed a commit that referenced this pull request May 16, 2026

fix(v3/darwin): runtime effectiveZoomButtonState reconciliation + cha…

42e853d

…ngelog for #5319 (#5467)

leaanthony mentioned this pull request May 20, 2026

feat: add FullscreenButtonState to WebviewWindowOptions for API consistency #5183

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Summary

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Pull request overview

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taliesin-ai commented May 15, 2026

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taliesin-ai commented May 15, 2026

What the threads identified (and what was fixed)

Additional: startup path corrected

Verification

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taliesin-ai commented May 15, 2026

What was done

Verification

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taliesin-ai commented May 15, 2026

Status: Superseded by PR #5457

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taliesin-ai commented May 15, 2026

Status: Superseded by PR #5457

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taliesin-ai commented May 15, 2026

Action required: please close this PR

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leaanthony commented May 3, 2026 •

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