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

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Higher level abstractions of the Compose UI primitives. This library is design system agnostic, providing the high-level building blocks for both application and design-system developers

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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.foundation.text.selection.selectionGestureInput
import androidx.compose.foundation.text.selection.updateSelectionTouchMode
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: LegacyTextFieldState,
    focusRequester: FocusRequester,
    readOnly: Boolean,
    offsetMapping: OffsetMapping
): Modifier

@Composable
internal fun Modifier.defaultTextFieldPointer(
    manager: TextFieldSelectionManager,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    state: LegacyTextFieldState,
    focusRequester: FocusRequester,
    readOnly: Boolean,
    offsetMapping: OffsetMapping
) = this
    .updateSelectionTouchMode { state.isInTouchMode = it }
    .tapPressTextFieldModifier(interactionSource, enabled) { offset ->
        requestFocusAndShowKeyboardIfNeeded(state, focusRequester, !readOnly)
        if (state.hasFocus && enabled) {
            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)
            }
        }
    }
    .selectionGestureInput(
        mouseSelectionObserver = manager.mouseSelectionObserver,
        textDragObserver = manager.touchSelectionObserver,
    )
    .pointerHoverIcon(textPointerIcon)