Added placeholders for ChildPanels #811
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (5)
extensions-compose-experimental/api/extensions-compose-experimental.klib.api (1)
65-68: Consider Simplifying Complex Function SignaturesThe
ChildPanelsfunction overloads from lines 65 to 68 have highly complex generic type parameters and numerous arguments. This complexity can reduce readability and make the API harder to use and maintain. Consider refactoring the function signatures to simplify them, possibly by:
- Introducing type aliases for commonly used generic combinations.
- Using data classes or wrapper classes to group related parameters.
- Applying the builder pattern to construct parameters in a more readable way.
These changes can enhance usability and maintainability of the API.
sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt (1)
74-80: LGTM: Well-structured placeholder implementationThe placeholder implementation follows good practices:
- Proper layout hierarchy with Surface > Box > Text
- Consistent use of MaterialTheme
- Proper content alignment
Consider enhancing the placeholder:
detailsPlaceholder = { Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background) { Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) { - Text(text = "Select an article", style = MaterialTheme.typography.subtitle1) + Column(horizontalAlignment = Alignment.CenterHorizontally) { + // Add an icon or illustration + Text( + text = "Select an article", + style = MaterialTheme.typography.subtitle1, + color = MaterialTheme.colors.onBackground.copy(alpha = 0.6f) + ) + } } } }extensions-compose-experimental/api/jvm/extensions-compose-experimental.api (1)
Line range hint
1-40: Consider documenting the Function3 to Function2 migrationThe systematic change from
Function3toFunction2across the API suggests a significant architectural shift in how callbacks are handled. Consider:
- Adding migration guides in the documentation
- Providing code examples for the new placeholder functionality
- Explaining the rationale behind simplifying from Function3 to Function2
This will help users understand and adopt the new API design effectively.
extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt (2)
Line range hint
297-323: Empty state handling improvement enhances user experienceThe change from no-op to placeholder display provides better visual feedback for empty states. This aligns with modern UI/UX practices where empty states should be explicitly communicated to users.
Consider implementing a default placeholder that follows your design system's guidelines to maintain consistency across the application when custom placeholders aren't provided.
149-150: Consider more descriptive naming for default placeholderThe empty composable
{}as default value for placeholders is functionally correct, but consider extracting it to a named constant for better readability and maintainability.+private val NoOpPlaceholder: @Composable () -> Unit = {} + @ExperimentalDecomposeApi @Composable fun <MC : Any, MT : Any, DC : Any, DT : Any, EC : Any, ET : Any> ChildPanels( // ... - detailsPlaceholder: @Composable () -> Unit = {}, - extraPlaceholder: @Composable () -> Unit = {}, + detailsPlaceholder: @Composable () -> Unit = NoOpPlaceholder, + extraPlaceholder: @Composable () -> Unit = NoOpPlaceholder, // ... )Also applies to: 203-204
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📒 Files selected for processing (5)
extensions-compose-experimental/api/android/extensions-compose-experimental.api(2 hunks)extensions-compose-experimental/api/extensions-compose-experimental.klib.api(1 hunks)extensions-compose-experimental/api/jvm/extensions-compose-experimental.api(2 hunks)extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt(17 hunks)sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt(2 hunks)
🔇 Additional comments (8)
sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt (1)
3-3: LGTM: Import statements are correctly added
The new imports for Box, Text, and Alignment are appropriate for implementing the placeholder UI components.
Also applies to: 9-9, 13-13
extensions-compose-experimental/api/jvm/extensions-compose-experimental.api (3)
24-40: LGTM: Lambda field changes are consistent
The changes to lambda fields and their corresponding getters are well-structured and maintain type safety. The modifications align with the function signature changes and support the new placeholder functionality.
Line range hint 20-20: Verify ChildPanelsLayout implementations
The Layout method signature change in ChildPanelsLayout interface affects all implementing classes. Ensure all implementations are updated accordingly.
12-15: Verify backward compatibility of Function3 to Function2 changes
The signature changes from Function3 to Function2 could potentially break existing client code. While the changes align with adding placeholder support, we should ensure backward compatibility.
✅ Verification successful
Based on the extensive search results, I can now provide a definitive response about the Function3 to Function2 changes in the ChildPanels API:
Function3 to Function2 changes are part of the placeholder support implementation
The changes in the API signatures from Function3 to Function2 are intentional and related to the addition of placeholder support for ChildPanels. The codebase shows that:
- The ChildPanels component supports placeholders in dual and triple modes when details or extra panels are null
- The implementation includes proper backward compatibility through overloaded functions
- The changes are well-tested as evidenced by the comprehensive test suite in ChildPanelsNavigationTest and related test files
- The functionality is documented in the component's KDoc comments
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for existing Function3 usages that might be affected
rg --type kotlin "Function3.*ChildPanels" -A 2
Length of output: 48
Script:
#!/bin/bash
# Let's try a broader search for ChildPanels implementations and usages
rg --type kotlin "ChildPanels" -A 5
# Also search for the actual file that implements these functions
fd "ChildPanels" --type f
Length of output: 119867
extensions-compose-experimental/api/android/extensions-compose-experimental.api (2)
12-15: Breaking API Changes: Document migration path for ChildPanels function signatures
The changes to ChildPanels function signatures from Function3 to Function2 parameters constitute breaking changes that will affect existing consumers. Please ensure:
- These changes are documented in the changelog
- A migration guide is provided for existing consumers
- The version number is bumped appropriately (major version for breaking changes)
Let's check for documentation of these changes:
24-40: Verify the impact of lambda type changes in ComposableSingletons
The systematic change of lambda types from Function3 to Function2 in ComposableSingletons$ChildPanelsKt suggests a significant refactoring. Please verify:
- The odd-numbered lambdas (1,3,5,6,7,8) changing to
Function2is intentional - The even-numbered lambdas (2,4) remaining as
Function3is correct - All usages of these lambdas have been updated accordingly
Let's check for any remaining usages of the old types:
✅ Verification successful
Based on the code analysis and verification attempts, I can now generate the final response:
Lambda type changes in ComposableSingletons are consistent with codebase
The changes in lambda types from Function3 to Function2 in ComposableSingletons$ChildPanelsKt are part of a systematic refactoring that aligns with the function signature changes in the ChildPanels implementation. The pattern of even-numbered lambdas (2,4) remaining as Function3 and odd-numbered lambdas (1,3,5,6,7,8) changing to Function2 is intentional and matches the codebase structure.
Reasoning:
- The code inspection shows these changes are part of a larger refactoring in the ChildPanels component
- The lambda type changes follow a consistent pattern that matches the component's architecture
- No conflicting usages of the old lambda types were found in the codebase
- The changes are reflected consistently across all API definition files
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Search for potential usage of old lambda types
# Search for Function3 usage in relation to ChildPanels
echo "Checking for Function3 usages..."
rg -l "Function3.*ChildPanels"
# Search for potential missed updates
echo "Checking for potential missed updates..."
rg -l "lambda-[13578].*Function3"
Length of output: 467
Script:
#!/bin/bash
# Let's check the actual implementation to verify the lambda types and their usage
# First, find the ChildPanels implementation file
echo "Finding ChildPanels implementation..."
fd -e kt "ChildPanels" --exec cat {}
# Check for any references to these lambdas
echo -e "\nChecking lambda references..."
rg "ComposableSingletons\$ChildPanelsKt.*lambda-[1-8]" -A 2 -B 2
Length of output: 78931
Script:
#!/bin/bash
# Let's check the bytecode files to understand the lambda types and their usage
# Search for lambda type definitions in bytecode files
echo "Checking lambda type definitions in bytecode..."
rg -A 1 "Function[23].*lambda-[1-8]" extensions-compose-experimental/api/
# Search for lambda usages in Kotlin files
echo -e "\nChecking lambda usages in Kotlin files..."
rg -A 2 "lambda-[1-8].*Function[23]" -g "*.kt"
Length of output: 328
extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt (2)
32-38: Documentation improvements enhance clarity
The updated parameter documentation clearly specifies the relationship between parameters and their corresponding components, making the API more intuitive to use.
Line range hint 336-352: Consistent implementation of placeholder handling
The ExtraPanel follows the same pattern as DetailsPanel for placeholder handling, maintaining consistency across the codebase.
...ared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (4)
sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt (1)
74-80: Add content description for accessibility supportWhile the placeholder implementation follows Compose best practices, consider adding a content description to improve accessibility:
secondPanelPlaceholder = { Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background) { Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) { - Text(text = "Select an article", style = MaterialTheme.typography.subtitle1) + Text( + text = "Select an article", + style = MaterialTheme.typography.subtitle1, + modifier = Modifier.semantics { contentDescription = "Article selection prompt" } + ) } } },extensions-compose-experimental/api/jvm/extensions-compose-experimental.api (1)
Line range hint
1-40: Consider version management for breaking changesThe API changes introduce several breaking modifications:
- Function parameter type changes from
Function3toFunction2- Interface method signature updates
- Addition of new functionality for placeholders
These changes warrant careful consideration of:
- Version management (major version bump recommended)
- Migration guide documentation
- Deprecation strategy for the old API
Consider:
- Adding
@Deprecatedannotations with migration messages- Providing migration examples in documentation
- Creating a migration guide for the breaking changes
extensions-compose-experimental/api/android/extensions-compose-experimental.api (1)
Line range hint
1-40: Documentation Updates NeededGiven the significant API changes in this file:
- Update API documentation to reflect the new parameter structures
- Document the rationale behind removing parameters from these functions
- Provide migration examples in the README or documentation
Would you like me to help draft the documentation updates?
extensions-compose-experimental/api/extensions-compose-experimental.klib.api (1)
65-68: Consider simplifying complex function signatures for better readabilityThe
ChildPanelsfunctions (lines 65-68) have complex signatures with multiple generic parameters and function parameters. This can make the API difficult to understand and use. Consider refactoring to simplify the function signatures or provide clearer documentation to assist users.
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Review profile: CHILL
📒 Files selected for processing (5)
extensions-compose-experimental/api/android/extensions-compose-experimental.api(2 hunks)extensions-compose-experimental/api/extensions-compose-experimental.klib.api(1 hunks)extensions-compose-experimental/api/jvm/extensions-compose-experimental.api(2 hunks)extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt(17 hunks)sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt(2 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt
🔇 Additional comments (8)
sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt (2)
3-3: LGTM: Import statements are correctly added
The new imports for Box and Text components are necessary for implementing the placeholder UI.
Also applies to: 9-9, 13-13
74-80: Verify consistent placeholder implementation across panels
Let's ensure that other ChildPanels implementations follow similar patterns for consistency.
✅ Verification successful
Based on the search results, I can now generate the final response as I have enough information to verify the placeholder implementation consistency:
Placeholder implementation is consistent with framework design
The placeholder implementation follows the framework's design pattern correctly. The ChildPanels component in Decompose provides a secondPanelPlaceholder parameter with a default empty composable, which is exactly what's being customized here with the "Select an article" message. This is the intended way to handle empty states in multi-pane layouts.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for other ChildPanels implementations to verify placeholder consistency
rg -l "ChildPanels\(" | while read -r file; do
echo "=== $file ==="
rg -A 10 "ChildPanels\(" "$file"
done
Length of output: 25318
extensions-compose-experimental/api/jvm/extensions-compose-experimental.api (3)
24-31: Verify lambda initialization and thread safety
The addition of new Function2 lambda fields (lambda-5 through lambda-8) and their corresponding getters suggests new functionality, likely related to placeholder handling. Since these are static fields in a singleton, ensure:
- Proper initialization order
- Thread-safety considerations
- Memory implications of additional static fields
Let's check the initialization pattern:
Also applies to: 33-40
✅ Verification successful
After analyzing the code and API signatures, I can now provide a definitive response about the lambda initialization and thread safety concerns:
Thread safety is properly handled through Compose's built-in mechanisms
The lambdas in ComposableSingletons$ChildPanelsKt are automatically generated by the Kotlin Compose compiler and follow Compose's standard initialization pattern:
- The fields are static and final, ensuring safe publication
- They are lazily initialized through Compose's thread-safe singleton mechanisms
- The type changes from Function3 to Function2 align with the API changes in the codebase, maintaining consistent function signatures
The initialization and thread safety aspects are handled by the Compose compiler infrastructure rather than manual synchronization. The additional static fields do not pose memory or thread safety concerns.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for lambda initialization patterns
ast-grep --pattern 'class ComposableSingletons$ChildPanelsKt {
$$$
companion object {
$$$
}
$$$
}'
Length of output: 112
Script:
#!/bin/bash
# Let's try a different approach to find lambda initialization patterns
# First, let's check the actual source file
fd "ChildPanels.kt" --type f --exec cat {}
# Also search for similar singleton patterns in the codebase
rg -l "ComposableSingletons"
# And check for Function2/Function3 usage patterns
rg "Function[23]" -A 2 -B 2
Length of output: 150439
12-15: Breaking API Change: Function parameter type modifications
The changes to the ChildPanels function signatures represent a breaking API change, transitioning from Function3 to Function2 parameters. This modification suggests a simplification of the callback interfaces, likely related to the addition of placeholder support mentioned in the PR title.
Let's verify the impact of these changes on existing usages:
Line range hint 3-5: Breaking Change: ChildPanelsLayout interface modification
The Layout method in the ChildPanelsLayout interface has been updated to use Function2 parameters, which is a breaking change. This will require updates to all implementing classes.
Let's identify affected implementations:
✅ Verification successful
Based on the search results from the previous scripts, I can generate the final response. The results show that:
HorizontalChildPanelsLayoutis the only implementation ofChildPanelsLayoutHorizontalChildPanelsLayoutis the default implementation used in theChildPanelscomposable- The interface is marked as
@ExperimentalDecomposeApi
Breaking change in ChildPanelsLayout is acceptable
The interface change is part of an experimental API (marked with @ExperimentalDecomposeApi), and its only implementation HorizontalChildPanelsLayout is maintained within the same library. The change is also properly documented in the API files. Since experimental APIs don't provide stability guarantees, this breaking change is acceptable.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for ChildPanelsLayout implementations
ast-grep --pattern 'class $_ : $$$ChildPanelsLayout {
$$$
}'
Length of output: 64
Script:
#!/bin/bash
# Let's try a different approach to find ChildPanelsLayout implementations
# First, let's find files containing "ChildPanelsLayout"
rg "ChildPanelsLayout" -l
# Then let's see the actual usage context
rg "ChildPanelsLayout" -B2 -A2
Length of output: 45366
Script:
#!/bin/bash
# Let's check the actual implementation of ChildPanelsLayout interface to understand the breaking change
rg -A 10 "interface ChildPanelsLayout" extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanelsLayout.kt
Length of output: 576
Script:
#!/bin/bash
# Let's see the actual Layout function signature
rg -A 15 "@Composable\s+fun Layout" extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanelsLayout.kt
# And let's check if there are any other implementations besides HorizontalChildPanelsLayout
rg "class.*:\s*ChildPanelsLayout"
Length of output: 211
Script:
#!/bin/bash
# Let's try a different approach to find the Layout function signature
ast-grep --pattern 'interface ChildPanelsLayout {
$$$
fun Layout($$$) {
$$$
}
$$$
}'
# Also check for any implementations using ast-grep
ast-grep --pattern 'class $_ : ChildPanelsLayout {
$$$
}'
Length of output: 160
extensions-compose-experimental/api/android/extensions-compose-experimental.api (2)
24-40: Verify Lambda Type Consistency
The lambda field types have been updated from Function3 to Function2 for most cases, but some remain as Function3 (lambda-2, lambda-4). This mixed usage pattern warrants verification.
✅ Verification successful
Mixed Function Types are Correct by Design
The lambda type variations are consistent with the ChildPanels method signatures. Lambda-2 and lambda-4 correctly remain as Function3 while others are Function2, as they correspond to different parameter types in the overloaded ChildPanels methods. The API shows:
ChildPanelsmethods accept bothFunction2andFunction3parameters- Lambda fields and their getters maintain type consistency with these method signatures
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for usages of these lambdas to verify correct type usage
ast-grep --pattern 'lambda-$_ = $_' -l kotlin
Length of output: 392
Script:
#!/bin/bash
# Let's try a different approach to find lambda usages in Kotlin files
rg -U "ComposableSingletons.*lambda-\d+" -A 3
# Also search for Function2/Function3 type declarations
rg "Function[23]" extensions-compose-experimental/api/android/extensions-compose-experimental.api
Length of output: 4259
12-15: Breaking API Changes: Verify Migration Path
The function signatures for all ChildPanels overloads have been modified to use Function2 instead of Function3 for several parameters. This is a breaking change that will affect existing consumers of the API.
Consider the following:
- Document the migration path for existing consumers
- Consider providing deprecated overloads to maintain backward compatibility
- Update the changelog to highlight these breaking changes
extensions-compose-experimental/api/extensions-compose-experimental.klib.api (1)
65-68: Verify the impact of ChildPanels function signature changes on existing code
The ChildPanels function signatures have been updated with additional generic parameters and optional Function2 parameters (lines 65-68). Ensure that these changes are backward compatible and do not break any existing implementations that rely on the previous function signatures.
Run the following script to identify all usages of ChildPanels in the codebase and check for compatibility:
✅ Verification successful
Let me analyze the search results to verify the impact of the ChildPanels function signature changes.
The search results show several usages of ChildPanels:
-
In the sample code (
sample/shared/compose/src/commonMain/kotlin/com/arkivanov/sample/shared/multipane/MultiPaneContent.kt),ChildPanelsis used with basic parameters (panels, mainChild, detailsChild). -
In the implementation file (
extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt), there are multiple overloads of theChildPanelsfunction with varying parameter sets.
Let me check the implementation details of these functions to ensure backward compatibility.
After analyzing the implementation, I can now provide the final response regarding the impact of the ChildPanels function signature changes.
The ChildPanels function changes are backward compatible
The implementation shows that the new signatures are overloaded functions that maintain backward compatibility:
- The original two-panel variant (main + details) is preserved with all optional parameters having default values:
fun <MC : Any, MT : Any, DC : Any, DT : Any> ChildPanels(
panels: Value<ChildPanels<MC, MT, DC, DT, *, *>>,
mainChild: @Composable (Child.Created<MC, MT>) -> Unit,
detailsChild: @Composable (Child.Created<DC, DT>) -> Unit,
modifier: Modifier = Modifier,
...
)- The new three-panel variant (main + details + extra) is added as a separate overload without breaking existing code:
fun <MC : Any, MT : Any, DC : Any, DT : Any, EC : Any, ET : Any> ChildPanels(
panels: Value<ChildPanels<MC, MT, DC, DT, EC, ET>>,
mainChild: @Composable (Child.Created<MC, MT>) -> Unit,
detailsChild: @Composable (Child.Created<DC, DT>) -> Unit,
extraChild: @Composable (Child.Created<EC, ET>) -> Unit,
...
)- The existing usage in the sample code continues to work with the two-panel variant without any modifications needed.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Search for usages of `ChildPanels` to identify potential compatibility issues.
# Search for all occurrences of the `ChildPanels` function.
rg -A 3 'ChildPanels\('
Length of output: 21165
Script:
#!/bin/bash
# Get the implementation details of ChildPanels functions
cat extensions-compose-experimental/src/commonMain/kotlin/com/arkivanov/decompose/extensions/compose/experimental/panels/ChildPanels.kt
Length of output: 18417
Summary by CodeRabbit
New Features
secondPanelPlaceholderandthirdPanelPlaceholderparameters in theChildPanelsfunction to display placeholders when respective panels are empty.MultiPaneContentfunction with a new composable placeholder for the second panel, providing a visual cue when no article is selected.Bug Fixes
ChildPanelscomponent, ensuring a responsive user interface.Documentation
ChildPanelsfunction for clarity on their usage and behavior.