Fix visibility of selection handles in iOS when text is RTL or BiDi #1331
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ASalavei
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May 2, 2024
MatkovIvan
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May 2, 2024
...kitMain/kotlin/androidx/compose/foundation/text/selection/TextFieldSelectionManager.uikit.kt
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MatkovIvan
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May 2, 2024
| internal actual fun TextFieldSelectionManager.isSelectionHandleInVisibleBound( | ||
| isStartHandle: Boolean | ||
| ): Boolean { | ||
| fun getSelectionHandleVisibilityPointPosition(isStartHandle: Boolean): Offset { |
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Also, can we have unit test for this logic?
MatkovIvan
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May 13, 2024
| val visibleBounds = state?.layoutCoordinates?.visibleBounds() | ||
| val handlePosition = getSelectionHandleVisibilityPointPosition(isStartHandle) | ||
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| return visibleBounds?.containsInclusive(handlePosition) ?: false |
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It seems alternative of containsInclusive with HeightToleranceFactor should be defined instead of reinventing getHandlePosition with their corner cases and transformations
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I rewrote it like this because I wanted to make proper check for coordinates of left and right selection handles (line 171), but it seems like it's not worth it.
Figured out how to arrange that properly, I'll rewrite soon. It won't be so simple as you suggested because I still need height for this solution, but it still be simpler than this.
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MatkovIvan
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ASalavei
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| 50.0f, | ||
| Rect(Offset(0f, 0f), Offset(744.0f, 50.0f)) | ||
| ) | ||
| assert(isStartVisible && isEndVisible) |
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- It's better to use
assertTrueorassertFalseto verify visible and invisible results. - please use one assert for every condition, like:
assertTrue(isStartVisible)
assertFalse(isEndVisible)
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…, added test screen in Components/TextField with RTL and BiDi examples
…nto separate method, added test cases for that method
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Adjusted check of visibility of selection handles in iOS - they won't be shown when they are visible less than 80% of their size.
This change is required for making selection handles visible when a single line textfield contains LTR + RTL text, before this fix selection handles weren't visible.
In addition, during scrolling the long textfield, selection handles will be hiding more smoothly than before.
Fixes: https://youtrack.jetbrains.com/issue/COMPOSE-1359/iOS-Selection-Handles-work-weirdly-when-text-is-RTL-LTR
Testing
Open the test app, go Android TextField Samples -> Basic input fields, write some LTR text in any textfield with RTL text, then try to select text. Selection Handles should be visible
Release Notes
Fixes - iOS
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