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유연한 Composable 설계
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HyunWoo Lee
July 20, 2024
Programming
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470
유연한 Composable 설계
Google I/O Extended Korea Andorid 2024에서 진행한 유연한 Composable 설계 발표의 Speaker Deck입니다.
HyunWoo Lee
July 20, 2024
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Transcript
ਬোೠ Composable ࢸ҅ അ Viva Republica(Toss) Android/React Native Developer
Motivation
None
None
fun RepositoryCard() { Column { Row { Row { Image();
Text(); Chip(); } Image(); } Row { Text(); } Row { Props(); Props(); Props(); } } } private fun Props() { Row { Image(); Text(); } }
fun RepositoryCard() { Column { Title(title = “sept-android”, isPrivate =
false) Description() Row { Language(); Stars(); Forks(); } } } private fun Props() { Row { Image(); Text(); } }
ߣ ࣁ࣌ীࢲח Scalable Consistent Guide Others
Framework Library App
Framework Library App
Think and Plan
ܻח ઁ ࢜۽ Composableਸ ٜ݅ө?
ઁ, যڌѱ ࢜۽ Composableਸ ٜ݅ Ѿबਸ оઉঠೡө?
Single Responsibility Principle(SRP) ೞա ೣࣻ ೞա ଼
Single Responsibility Principle(SRP) ೞա ೣࣻ ೞա ଼
Ѣ ࠺तೠ ਊ۹۽ ডр ߸݅ ਃೠ ҃ Component ࢸ҅ ߑध
Think and Plan ౠ ਃҳࢎ೦ ইצ ҕాػ ࢎ೦ٜਸ ҳഅೞҊ ೞח Composable Ҋࣻળ(Higher level) API ࣻળ(Lower level) API
Ҋࣻળਵ۽ тࣻ۾ ز ח ݺഛ೧Ҋ ழझథ ৈח যઉঠ ೠ Component
ࢸ҅ ߑध Think and Plan
@Composable fun AssistChip( onClick: () -> Unit, label: @Composable ()
-> Unit, modifier: Modifier = Modifier, enabled: Boolean = true, leadingIcon: @Composable (() -> Unit)? = null, trailingIcon: @Composable (() -> Unit)? = null, /* etc */ ) = Chip( modifier = modifier, onClick = onClick, enabled = enabled, label = label, leadingIcon = leadingIcon, trailingIcon = trailingIcon, )
@Composable fun Chip( onClick: () -> Unit, label: @Composable ()
-> Unit, modifier: Modifier = Modifier, enabled: Boolean = true, leadingIcon: @Composable (() -> Unit)? = null, trailingIcon: @Composable (() -> Unit)? = null, /* etc */ ) { Surface( onClick = onClick, modifier = modifier.semantics { role = Role.Button }, enabled = enabled /* etc */ ) { ChipContent( label = label, leadingIcon = leadingIcon, trailingIcon = trailingIcon, /* etc */ ) } }
ӝઓী ח ஹನք݅ਵ۽ ࠙ೞݶ ୶о۽ ٜ݅ ঋইب ػ. ߄௰ܳ ߊݺೞ
݃ۄ Think and Plan
Name and Parameters
Naming
fun FilterChip() fun filterChip() • Composeীࢲ UI ҳࢿਃࣗܳ աఋ ն
• ېझ ӝ ഋधਸ ରਊ fun gdgState(): State fun GdgState(): State • ೣࣻ ֎߁ ӏਸ ࢎਊ • ೣࣻח чਸ ߈ജೞѢա UI ҙ۲ ਃࣗ ٜਸ emit ೧ঠೠ. fun rememberCoroutineScope(): CoroutineScope fun createCoroutineScope(): CoroutineScope • Recompositionীࢲب чਸ ਬೞ ח Ѫਸ द UI ҳࢿਃࣗܳ emitೞח @Composable Name and Parameters чਸ ܻఢೞח @Composable rememberܳ ࢎਊೞח @Composable
// DO!! // InputField @Composable fun InputField(inputState: InputState) {
// ࢎਊ(Call-Site) val inputState = remember { InputState() } Button("Clear input", onClick = { inputState.clear() }) InputField(inputState)
// DON’T!! // InputField @Composable fun InputField(): UserInputState {
// पઁ ࢎਊ Button("Clear input", onClick = { …? }) val inputState = InputField()
1. Chip() 2. BasicTextField() 3. FilterChip() GoogleChip() FeatureXChip() 1. ߄۽
ࢎਊоמೠ ӝࠄ ஹನք 2. ୶оਵ۽ झఋੌ݂ ਃೠ ࣻ ળ ஹನք 3. ౠ Usecaseܳ оҊ ח ஹನ ք val LocalTheme = compositionLocalOf() val ThemeLocal = compositionLocalOf() Prefixing CompositionLocal Name and Parameters
Parameters
@Composable fun Chip( modifier: Modifier, onClick: () -> Unit, )
Chip( modifier = Modifier, onClick = { } ) { // TODO } ಁ۞ఠܳ ݺदਵ۽ ٘۞ղۄ → ಁ۞ఠо যڃ Ѫੋ ࡅܰѱ ঈ оמ Parameters Name and Parameters
// DON’T val LocalChipBorder = compositionLocalOf() @Composable fun Chip( modifier:
Modifier, onClick: () -> Unit, ) { val border = LocalChipBorder.current } ঐद ࢎਊ < ݺद ࢎਊ → CompositionLocal < State Hoisting Parameters Name and Parameters
// DO @Composable fun Chip( border: BorderStroke, ) { //
Set border } ঐद ࢎਊ < ݺद ࢎਊ → CompositionLocal < State Hoisting Parameters Name and Parameters
@Composable fun Chip( modifier: Modifier ) // Call-Site Chip(Modifier.padding(8.dp)) Components
→ define own internal behavior and appearance Modifiers -> modify external Modifiers Name and Parameters
@Composable fun Chip( modifier: Modifier ) @Composable fun Button( modifier:
Modifier = Modifier, ) @Composable fun Card( modifier: Modifier = Modifier, ) Compose ࢎਊٜ Ӓ ஹನք ࢎਊߑߨਸ যוب ఠٙ೮ӝী, যڌѱ ࢎਊೡ Ӓ ಁఢ ۚ ਵ۽ ೧ઉ. Modifiers Name and Parameters
@Composable fun Chip( modifier: Modifier ) UI ਃࣗܳ emitೞח Composable
Modifier ಁ۞ ఠ ࣻ۽ ઓ೧ঠೣ Modifiers Name and Parameters
@Composable fun Chip( label: @Composable () -> Unit, onClick: ()
-> Unit, modifier: Modifier = Modifier ) UI ਃࣗܳ emitೞח Composable Modifier ಁ۞ ఠ ࣻ۽ ઓ೧ঠೣ ݽٚ Optional Parameter о ߣ૩۽ ਤ೧ ঠೣ - First optional parameter Modifiers Name and Parameters
@Composable fun Chip( modifier: Modifier = Modifier ) { Row(modifier
= modifier.size(16.dp) } // Call-site Chip( modifier = Modifier.padding(8.dp) ) UI ਃࣗܳ emitೞח Composable Modifier ಁ۞ ఠ ࣻ۽ ઓ೧ঠೣ ݽٚ Optional Parameter о ߣ૩۽ ਤ೧ ঠೣ - First optional parameter Monoid Type → ಁ۞ఠীࢲ ֈӟ чਸ Ӓ۽ ղ ࠗীࢲ Ӓ۽ ࢎਊоמ + ২࣌ ୶о оמ Modifiers Name and Parameters
@Composable fun Chip( modifier: Modifier = Modifier ) { Row(modifier
= modifier.size(16.dp) } UI ਃࣗܳ emitೞח Composable Modifier ಁ۞ ఠ ࣻ۽ ઓ೧ঠೣ ݽٚ Optional Parameter о ߣ૩۽ ਤ೧ ঠೣ - First optional parameter Monoid Type → ಁ۞ఠীࢲ ֈӟ чਸ Ӓ۽ ղ ࠗীࢲ Ӓ۽ ࢎਊоמ + ২࣌ ୶о оמ ೣࣻ ಁ۞ఠ Modifier ఋੑ ױ ೞաৈঠೣ Modifiers Name and Parameters
@Composable fun Chip( enabled: Boolean, icon: @Composable () -> Unit,
modifier: Modifier = Modifier, shape: Shape = ChipDefaults…, colors: ChipColors = ChipDefaults… ) { Surface( modifier = modifier, enabled = enabled, shape = shape, color = colors.containerColor(enabled) ) { // etc… } } Chip(modifier = Modifier.padding(8.dp)) Modifiers or explicit parameters? ஹನ࠶ ೯زҗ UIܳ ೞח чੋؘ Modifierী ֍ਸ ࣻ হח ఋੑ → Explicit Parameters Modifier۽ ֍ਸ ࣻ ח ఋੑ → Modifier Name and Parameters
@Composable fun Chip( onClick: () -> Unit, enabled: Boolean, icon:
@Composable () -> Unit, modifier: Modifier = Modifier, shape: Shape = ChipDefaults…, colors: ChipColors = ChipDefaults…, content: @Composable () -> Unit, ) Ordering 1. Required Params 2. Modifier 3. Optional Params 4. @Composable content params Name and Parameters
@Composable fun Chip( onClick: () -> Unit, enabled: Boolean, icon:
@Composable () -> Unit, modifier: Modifier = Modifier, shape: Shape = ChipDefaults…, colors: ChipColors = ChipDefaults…, content: @Composable () -> Unit, ) Ordering 1. Required Params 2. Modifier 3. Optional Params 4. @Composable content params Name and Parameters
@Composable fun Chip( onClick: () -> Unit, modifier: Modifier =
Modifier, enabled: Boolean = true, shape: Shape = ChipDefaults.shape, colors: ChipColors = ChipDefaults…, icon: @Composable () -> Unit? = null, content: @Composable () -> Unit, ) Default and nullable Empty Nullable Default Ҷ হযب غח ӝמ ੑ۱ ਃೣ, ೞ݅ ࠼ ч ٜযоب ؽ ࠺যਵݶ উغח ч Name and Parameters
@Composable fun Chip( onClick: () -> Unit, modifier: Modifier =
Modifier, enabled: Boolean = true, elevation: Dp = 8.dp shape: Shape = ChipDefaults.shape, colors: ChipColors = ChipDefaults…, icon: @Composable () -> Unit? = null, content: @Composable () -> Unit, ) Styling Defaults Inline ૣҊ ஏоמೠ ҃ ӝࠄч ݆ ਃೠ ҃ ࢚కчী ٮۄ ࠙ӝо ܻغযঠ ೞח ҃ Name and Parameters
@Composable fun Chip( onClick: () -> Unit, shape: Shape =
ChipDefaults.shape, colors: ChipColors = ChipDefaults…, ) object ChipDefaults { val shape = InputChip.ContainerShape fun colors(): ChipColors fun elevation(): ChipElevation } Styling Defaults Inline ૣҊ ஏоמೠ ҃ ӝࠄч ݆ ਃೠ ҃ ࢚కчী ٮۄ ࠙ӝо ܻغযঠ ೞח ҃ Name and Parameters
// Kotlin 2.2 Experimental dataarg class ChipColors( container: Color, label:
Color ) @Composable fun Chip( onClick: () -> Unit, modifier: Modifier = Modifier, enabled: Boolean = true, dataarg colors: ChipColors, ) Chip( onClick = {}, container = Color(…) ) // Kotlin Language Features in 2.0 and beyond https://www.youtube.com/watch?v=tAGJ5zJXJ7w // ೠҴয ߡ (KotlinConf’24 Global South Korea) https://speakerdeck.com/dalinaum/recap-kotlin- language-features-in-2-dot-0-and-beyond- michail-zarecenskij Styling Defaults Inline ૣҊ ஏоמೠ ҃ ӝࠄч ݆ ਃೠ ҃ ࢚కчী ٮۄ ࠙ӝо ܻغযঠ ೞח ҃ Name and Parameters
@Composable fun Chip( icon: @Composable () -> Unit? = null,
label: @Composable () -> Unit, ) Slots Single Slot Mutliple Slots content ಁ۞ఠ ݺद ಁ۞ఠ ഐױীࢲ ஹನքܳ ೧ࢲ ੑೞݶ ղࠗীࢲ ܳ ഝਊ೧ࢲ UIܳ ҳࢿೞח ߑध Name and Parameters
@Composable fun Chip( enalbled: Boolean = true, ) Chip( enabled
= true ) State State Hoistingਸ ӝ߈ਵ۽ غب۾ݶ ৻ࠗীࢲ ࢚కܳ ҙܻೡ ࣻ ب۾ ೞۄ Name and Parameters
@Composable fun Chip( enalbled: Boolean = true, onClick: () ->
Unit, ) // call-site Chip( enabled = true onClick = { } ) Events ࢚కח ৻ࠗীࢲ ઑೡ ࣻ ݅ ஹನքীࢲ ৻ࠗী नഐܳ ߉ਸ ࣻ ח ߑߨ ۈ ۄఠ۽ ѐߊо ߮ܳ ೡ ࣻ Name and Parameters
Conclusion
ೞա ஹನքח ೞա ଼ਸ APIܳ ਬোೞѱ ࢸ҅ೞ۰ݶ? Conclusion ୶࢚ചػ ࣻળ
APIܳ ӝ߈ਵ۽ Ҋࣻળ APIܳ ѐߊ оةࢿ જ Naming & Parameter ஶ߮࣌ Composableਸ ҳࢿೞח নೠ ਃࣗܳ Ҋ۰ • Slots • State • Event
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