commonMain.androidx.compose.foundation.text.TextFieldGestureModifiers.kt Maven / Gradle / Ivy

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/*
 * Copyright 2021 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.foundation.text

import androidx.compose.foundation.focusable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.text.selection.MouseSelectionObserver
import androidx.compose.foundation.text.selection.mouseSelectionDetector
import androidx.compose.runtime.getValue
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.ui.Modifier
import androidx.compose.ui.composed
import androidx.compose.ui.focus.FocusRequester
import androidx.compose.ui.focus.FocusState
import androidx.compose.ui.focus.focusRequester
import androidx.compose.ui.focus.onFocusChanged
import androidx.compose.ui.input.pointer.pointerInput

// Touch selection
internal fun Modifier.longPressDragGestureFilter(
    observer: TextDragObserver,
    enabled: Boolean
) = if (enabled) {
    this.pointerInput(observer) { detectDragGesturesAfterLongPressWithObserver(observer) }
} else {
    this
}

// Focus modifiers
internal fun Modifier.textFieldFocusModifier(
    enabled: Boolean,
    focusRequester: FocusRequester,
    interactionSource: MutableInteractionSource?,
    onFocusChanged: (FocusState) -> Unit
) = this
    .focusRequester(focusRequester)
    .onFocusChanged(onFocusChanged)
    .focusable(interactionSource = interactionSource, enabled = enabled)

// Mouse
internal fun Modifier.mouseDragGestureDetector(
    observer: MouseSelectionObserver,
    enabled: Boolean
) = if (enabled) Modifier.composed {
    // TODO(https://youtrack.jetbrains.com/issue/COMPOSE-79) how we can rewrite this without `composed`?
    val currentMouseSelectionObserver by rememberUpdatedState(observer)
    pointerInput(Unit) {
        mouseSelectionDetector(currentMouseSelectionObserver)
    }
} else this