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add functionality to selector

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InsanusMokrassar 2020-12-14 20:01:37 +06:00
parent 6f9d5e2d5f
commit a60cb596d1
1 changed files with 55 additions and 0 deletions
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55
selector/common/src/commonMain/kotlin/dev/inmo/micro_utils/selector/Selector.kt
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@ -12,12 +12,21 @@ interface Selector<T> {
val itemUnselected: SharedFlow<T>
suspend fun toggleSelection(element: T)
suspend fun forceSelect(element: T)
suspend fun forceDeselect(element: T)
suspend fun clearSelection()
}
@Suppress("NOTHING_TO_INLINE")
inline operator fun <T> Selector<T>.contains(element: T) = selectedItems.contains(element)
@Suppress("NOTHING_TO_INLINE")
inline fun <T> Selector<T>.nothingSelected(): Boolean = selectedItems.isEmpty()
suspend inline fun <T> Selector<T>.toggleSelection(elements: List<T>) = elements.forEach { toggleSelection(it) }
suspend inline fun <T> Selector<T>.forceSelect(elements: List<T>) = elements.forEach { forceSelect(it) }
suspend inline fun <T> Selector<T>.forceDeselect(elements: List<T>) = elements.forEach { forceDeselect(it) }
suspend inline fun <T> Selector<T>.toggleSelection(firstElement: T, vararg elements: T) = toggleSelection(listOf(firstElement) + elements.toList())
suspend inline fun <T> Selector<T>.forceSelect(firstElement: T, vararg elements: T) = forceSelect(listOf(firstElement) + elements.toList())
suspend inline fun <T> Selector<T>.forceDeselect(firstElement: T, vararg elements: T) = forceDeselect(listOf(firstElement) + elements.toList())
/**
* Realization of [Selector] with one or without selected element. This realization will always have empty
@ -48,6 +57,24 @@ class SingleSelector<T>(
null
}
override suspend fun forceDeselect(element: T) {
mutex ?.lock()
if (selectedItem == element) {
selectedItem = null
_itemUnselected.emit(element)
}
mutex ?.unlock()
}
override suspend fun forceSelect(element: T) {
mutex ?.lock()
if (selectedItem != element) {
selectedItem = element
_itemSelected.emit(element)
}
mutex ?.unlock()
}
override suspend fun toggleSelection(element: T) {
mutex ?.lock()
if (selectedItem == element) {
@ -64,6 +91,10 @@ class SingleSelector<T>(
}
mutex ?.unlock()
}
override suspend fun clearSelection() {
selectedItem ?.let { forceDeselect(it) }
}
}
/**
@ -90,6 +121,22 @@ class MultipleSelector<T>(
null
}
override suspend fun forceDeselect(element: T) {
mutex ?.lock()
if (_selectedItems.remove(element)) {
_itemUnselected.emit(element)
}
mutex ?.unlock()
}
override suspend fun forceSelect(element: T) {
mutex ?.lock()
if (element !in _selectedItems && _selectedItems.add(element)) {
_itemSelected.emit(element)
}
mutex ?.unlock()
}
override suspend fun toggleSelection(element: T) {
mutex ?.lock()
if (_selectedItems.remove(element)) {
@ -100,6 +147,14 @@ class MultipleSelector<T>(
}
mutex ?.unlock()
}
override suspend fun clearSelection() {
mutex ?.lock()
val preSelectedItems = _selectedItems.toList()
_selectedItems.clear()
preSelectedItems.forEach { _itemUnselected.emit(it) }
mutex ?.unlock()
}
}
@Suppress("FunctionName", "NOTHING_TO_INLINE")