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117 lines
4.1 KiB
Kotlin
117 lines
4.1 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.compose
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import androidx.compose.foundation.background
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import androidx.compose.foundation.layout.Arrangement
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import androidx.compose.foundation.layout.Box
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import androidx.compose.material.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.layout.Layout
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import androidx.compose.ui.platform.LocalLayoutDirection
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import androidx.compose.ui.text.style.TextOverflow
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import androidx.compose.ui.tooling.preview.Preview
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import androidx.compose.ui.unit.sp
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import org.mozilla.fenix.theme.FirefoxTheme
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/**
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* Special caption text for a tab layout shown on one line.
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*
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* This will combine [firstText] with a interdot and then [secondText] ensuring that the second text
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* (which is assumed to be smaller) always fills as much space as needed with the [firstText] automatically
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* being resized to be smaller with an added ellipsis characters if needed.
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*
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* Possible results:
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* ```
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* - when both texts would fit the screen
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* ------------------------------------------
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* |firstText · secondText |
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* ------------------------------------------
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*
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* - when both text do not fit, second is shown in entirety, first is ellipsised.
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* ------------------------------------------
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* |longerFirstTextOrSmallSc... · secondText|
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* ------------------------------------------
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* ```
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*
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* @param firstText Text shown at the start of the row.
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* @param secondText Text shown at the end of the row.
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*/
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@Composable
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fun TabSubtitleWithInterdot(
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firstText: String,
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secondText: String,
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) {
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val currentLayoutDirection = LocalLayoutDirection.current
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Layout(
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content = {
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Text(
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text = firstText,
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color = FirefoxTheme.colors.textSecondary,
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fontSize = 12.sp,
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overflow = TextOverflow.Ellipsis,
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maxLines = 1,
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)
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Text(
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text = " \u00b7 ",
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color = FirefoxTheme.colors.textSecondary,
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fontSize = 12.sp,
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overflow = TextOverflow.Ellipsis,
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maxLines = 1,
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)
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Text(
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text = secondText,
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color = FirefoxTheme.colors.textSecondary,
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fontSize = 12.sp,
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overflow = TextOverflow.Ellipsis,
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maxLines = 1,
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)
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},
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) { items, constraints ->
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// We need to measure from the end to start to ensure the secondItem will always be on screen
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// and depending on secondItem's width and interdot's width the firstItem is automatically resized.
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val secondItem = items[2].measure(constraints)
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val interdot = items[1].measure(
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constraints.copy(maxWidth = constraints.maxWidth - secondItem.width),
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)
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val firstItem = items[0].measure(
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constraints.copy(maxWidth = constraints.maxWidth - secondItem.width - interdot.width),
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)
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layout(constraints.maxWidth, constraints.maxHeight) {
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val itemsPositions = IntArray(items.size)
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with(Arrangement.Start) {
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arrange(
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constraints.maxWidth,
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intArrayOf(firstItem.width, interdot.width, secondItem.width),
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currentLayoutDirection,
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itemsPositions,
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)
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}
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val placementHeight = constraints.maxHeight - firstItem.height
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listOf(firstItem, interdot, secondItem).forEachIndexed { index, item ->
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item.place(itemsPositions[index], placementHeight)
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}
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}
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}
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}
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@Composable
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@Preview
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private fun TabSubtitleWithInterdotPreview() {
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FirefoxTheme {
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Box(Modifier.background(FirefoxTheme.colors.layer2)) {
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TabSubtitleWithInterdot(
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firstText = "firstText",
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secondText = "secondText",
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)
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}
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}
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}
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