/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.ui.node
import androidx.compose.ui.input.key.KeyEvent
import androidx.compose.ui.input.key.KeyInputModifier
internal class ModifiedKeyInputNode(
wrapped: LayoutNodeWrapper,
modifier: KeyInputModifier
) : DelegatingLayoutNodeWrapper<KeyInputModifier>(wrapped, modifier) {
override fun onInitialize() {
super.onInitialize()
modifier.keyInputNode = this
}
override fun findPreviousKeyInputWrapper() = this
override fun findNextKeyInputWrapper() = this
fun propagatePreviewKeyEvent(keyEvent: KeyEvent): Boolean {
// We first propagate the preview key event to the parent.
val consumed = findParentKeyInputNode()?.propagatePreviewKeyEvent(keyEvent)
if (consumed == true) return consumed
// If none of the parents consumed the event, we attempt to consume it.
return modifier.onPreviewKeyEvent?.invoke(keyEvent) ?: false
}
fun propagateKeyEvent(keyEvent: KeyEvent): Boolean {
// We attempt to consume the key event first.
val consumed = modifier.onKeyEvent?.invoke(keyEvent)
if (consumed == true) return consumed
// If the event is not consumed, we propagate it to the parent.
return findParentKeyInputNode()?.propagateKeyEvent(keyEvent) ?: false
}
}