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[WIP] Migrate Design System components in Jetsnack to use Styles #1669
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41 changes: 41 additions & 0 deletions
41
Jetsnack/app/src/main/java/androidx/compose/material3/CompositionLocals.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package androidx.compose.material3 | ||
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| import androidx.compose.runtime.ProvidableCompositionLocal | ||
| import java.lang.reflect.Method | ||
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| // This file is only because we don't have this yet implemented in Material 3 theming. | ||
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| // This will not be how it's done when its released :) | ||
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| val LocalShapes: ProvidableCompositionLocal<Shapes> | ||
| get() = getInternalLocal( | ||
| className = "androidx.compose.material3.ShapesKt", | ||
| methodName = "getLocalShapes", | ||
| readableName = "LocalShapes" | ||
| ) | ||
|
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| val LocalColorScheme: ProvidableCompositionLocal<ColorScheme> | ||
| get() = getInternalLocal( | ||
| className = "androidx.compose.material3.ColorSchemeKt", | ||
| methodName = "getLocalColorScheme", | ||
| readableName = "LocalColorScheme" | ||
| ) | ||
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| val LocalTypography: ProvidableCompositionLocal<Typography> | ||
| get() = getInternalLocal( | ||
| className = "androidx.compose.material3.TypographyKt", | ||
| methodName = "getLocalTypography", | ||
| readableName = "LocalTypography" | ||
| ) | ||
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| private fun <T> getInternalLocal(className: String, methodName: String, readableName: String): ProvidableCompositionLocal<T> { | ||
| try { | ||
| val clazz = Class.forName(className) | ||
| val method: Method = clazz.getDeclaredMethod(methodName) | ||
| method.isAccessible = true | ||
| @Suppress("UNCHECKED_CAST") | ||
| return method.invoke(null) as ProvidableCompositionLocal<T> | ||
| } catch (e: Exception) { | ||
| throw RuntimeException("Failed to access internal $readableName via reflection", e) | ||
| } | ||
| } | ||
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Using reflection to access internal library APIs is highly discouraged as it's brittle and can break without warning on any library update, even minor ones. This makes the app fragile.
Also, catching a generic
Exceptionis too broad. It would be safer to catch specific reflection-related exceptions likeClassNotFoundException,NoSuchMethodException, etc., to have a better understanding of what went wrong.