commonMain.androidx.compose.foundation.text.TextFieldPointerModifier.common.kt Maven / Gradle / Ivy

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/*
 * Copyright 2023 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.interaction.MutableInteractionSource
import androidx.compose.foundation.text.selection.TextFieldSelectionManager
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.focus.FocusRequester
import androidx.compose.ui.input.pointer.pointerHoverIcon
import androidx.compose.ui.text.input.OffsetMapping

@Composable
internal expect fun Modifier.textFieldPointer(
    manager: TextFieldSelectionManager,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    state: TextFieldState,
    focusRequester: FocusRequester,
    readOnly: Boolean,
    offsetMapping: OffsetMapping
): Modifier

@Composable
@OptIn(InternalFoundationTextApi::class)
internal fun Modifier.defaultTextFieldPointer(
    manager: TextFieldSelectionManager,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    state: TextFieldState,
    focusRequester: FocusRequester,
    readOnly: Boolean,
    offsetMapping: OffsetMapping
): Modifier = if (isInTouchMode) {
    val selectionModifier =
        Modifier.longPressDragGestureFilter(manager.touchSelectionObserver, enabled)
    this
        .tapPressTextFieldModifier(interactionSource, enabled) { offset ->
            tapTextFieldToFocus(state, focusRequester, !readOnly)
            if (state.hasFocus) {
                if (state.handleState != HandleState.Selection) {
                    state.layoutResult?.let { layoutResult ->
                        TextFieldDelegate.setCursorOffset(
                            offset,
                            layoutResult,
                            state.processor,
                            offsetMapping,
                            state.onValueChange
                        )
                        // Won't enter cursor state when text is empty.
                        if (state.textDelegate.text.isNotEmpty()) {
                            state.handleState = HandleState.Cursor
                        }
                    }
                } else {
                    manager.deselect(offset)
                }
            }
        }
        .then(selectionModifier)
        .pointerHoverIcon(textPointerIcon)
} else {
    this
        .mouseDragGestureDetector(
            observer = manager.mouseSelectionObserver,
            enabled = enabled
        )
        .pointerHoverIcon(textPointerIcon)
}