Fixed the Header and Footer-Name textbox is cut off in collection view

[NanthiniMahalingam]

Issue Details:

• When dynamically changing the CollectionView's width, the end portion of the CollectionView header's and footer's children gets cut off.
• This issue has been raised in CollectionView1 alone.

Root Cause

• The HeaderView frame update scenario is not considered when the CollectionView size changes.
• ⁠The FooterView frame updates only for a CollectionView with an ItemSource; it does not update when the CollectionView does not contain any items.

Description of Change

• Considered the HeaderView frame update when the CollectionView size changes.
• Updated the FooterView frame where the CollectionView does not contain items, applicable to both horizontal and vertical layouts.

Issues Fixed

Fixes #26186

Validated the behaviour in the following platforms

• Android
• Windows
• iOS
• Mac

Output

iOS platform

Before	After
Before_iOS.mov	After_iOS.mov

macOS platform

Before	After
Before_macOS.mov	After_macOS.mov

[rmarinho]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

The existing UITest HeaderAndFooterShouldBeVisible is failing.

VisualTestUtils.VisualTestFailedException :
Snapshot different than baseline: HeaderAndFooterShouldBeVisible.png (2.16% difference)

There are small differences, could you take a look?

[NanthiniMahalingam]

The existing UITest HeaderAndFooterShouldBeVisible is failing.

VisualTestUtils.VisualTestFailedException :
Snapshot different than baseline: HeaderAndFooterShouldBeVisible.png (2.16% difference)

There are small differences, could you take a look?

Hi @jsuarezruiz

• The HeaderAndFooterShouldBeVisible failed case is unrelated to my fix and has been excluded for the Mac platform in the latest merge ([testing] Skip tests that fail on Catalyst #27010).
• Therefore, I have rebased the branch to resolve the snapshot difference issue.

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).