androidAndroidTest.androidx.compose.ui.text.TextMeasurerTest.kt Maven / Gradle / Ivy
/*
* Copyright 2022 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.
*/
@file:OptIn(ExperimentalTextApi::class)
package androidx.compose.ui.text
import androidx.compose.ui.graphics.Brush
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shadow
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.createFontFamilyResolver
import androidx.compose.ui.text.font.toFontFamily
import androidx.compose.ui.text.style.TextDecoration
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Density
import androidx.compose.ui.unit.LayoutDirection
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.SmallTest
import androidx.test.platform.app.InstrumentationRegistry
import com.google.common.truth.Truth.assertThat
import org.junit.Test
import org.junit.runner.RunWith
@RunWith(AndroidJUnit4::class)
@SmallTest
class TextMeasurerTest {
private val fontFamilyMeasureFont = FontTestData.BASIC_MEASURE_FONT.toFontFamily()
private val context = InstrumentationRegistry.getInstrumentation().context
private val fontFamilyResolver = createFontFamilyResolver(context)
private val defaultDensity = Density(density = 1f)
private val layoutDirection = LayoutDirection.Ltr
private val longText = AnnotatedString(
"Lorem ipsum dolor sit amet, consectetur " +
"adipiscing elit. Curabitur augue leo, finibus vitae felis ac, pretium condimentum " +
"augue. Nullam non libero sed lectus aliquet venenatis non at purus. Fusce id arcu " +
"eu mauris pulvinar laoreet."
)
private val multiLineText = AnnotatedString("Lorem\nipsum\ndolor\nsit\namet")
@Test
fun width_shouldMatter_ifSoftwrapIsEnabled() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = true,
constraints = Constraints(maxWidth = 200)
)
)
assertThat(textLayoutResult.multiParagraph.width).isEqualTo(200)
}
@Test
fun width_shouldMatter_ifSoftwrapIsDisabled_butOverflowIsEllipsis() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = false,
overflow = TextOverflow.Ellipsis,
constraints = Constraints(maxWidth = 200)
)
)
assertThat(textLayoutResult.multiParagraph.width).isEqualTo(200)
}
@Test
fun width_shouldBeMaxIntrinsicWidth_ifSoftwrapIsDisabled_andOverflowIsClip() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints(maxWidth = 200)
)
)
val intrinsics = multiParagraphIntrinsics(text = longText)
assertThat(textLayoutResult.multiParagraph.width).isEqualTo(intrinsics.maxIntrinsicWidth)
}
@Test
fun width_shouldBeMaxIntrinsicWidth_ifSoftwrapIsDisabled_andOverflowIsVisible() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints(maxWidth = 200)
)
)
val intrinsics = multiParagraphIntrinsics(text = longText)
assertThat(textLayoutResult.multiParagraph.width).isEqualTo(intrinsics.maxIntrinsicWidth)
}
@Test
fun overwriteMaxLines_ifSoftwrapIsDisabled_andTextOverflowIsEllipsis() {
val textLayoutResult = layoutText(
textLayoutInput(
text = multiLineText,
softWrap = false,
overflow = TextOverflow.Ellipsis
)
)
assertThat(textLayoutResult.multiParagraph.lineCount).isEqualTo(1)
}
@Test
fun dontOverwriteMaxLines_ifSoftwrapIsEnabled() {
val textLayoutResult = layoutText(
textLayoutInput(
text = multiLineText,
softWrap = true,
overflow = TextOverflow.Ellipsis
)
)
assertThat(textLayoutResult.multiParagraph.lineCount).isEqualTo(5)
}
@Test
fun disabledSoftwrap_andOverflowClip_shouldConstrainLayoutSize() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints(maxWidth = 200)
)
)
assertThat(textLayoutResult.multiParagraph.width).isNotEqualTo(200f)
assertThat(textLayoutResult.size.width).isEqualTo(200)
}
@Test
fun disabledSoftwrap_andOverflowVisible_shouldConstrainLayoutSize() {
val textLayoutResult = layoutText(
textLayoutInput(
text = longText,
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints(maxWidth = 200)
)
)
assertThat(textLayoutResult.multiParagraph.width).isNotEqualTo(200f)
assertThat(textLayoutResult.size.width).isEqualTo(200)
}
@Test
fun colorShouldChangeInResult_whenCacheIsActive() {
val textMeasurer = textMeasurer(cacheSize = 8)
val firstTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(color = Color.Red)
), textMeasurer
)
val secondTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(color = Color.Blue)
), textMeasurer
)
assertThat(firstTextLayout.multiParagraph).isSameInstanceAs(secondTextLayout.multiParagraph)
assertThat(firstTextLayout.layoutInput.style.color).isEqualTo(Color.Red)
assertThat(secondTextLayout.layoutInput.style.color).isEqualTo(Color.Blue)
}
@Test
fun brushShouldChangeInResult_whenCacheIsActive() {
val textMeasurer = textMeasurer(cacheSize = 8)
val firstTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(brush = Brush.linearGradient(listOf(Color.Red, Color.Blue)))
), textMeasurer
)
val secondTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(brush = Brush.linearGradient(listOf(Color.Green, Color.Yellow)))
), textMeasurer
)
assertThat(firstTextLayout.multiParagraph).isSameInstanceAs(secondTextLayout.multiParagraph)
assertThat(firstTextLayout.layoutInput.style.brush)
.isEqualTo(Brush.linearGradient(listOf(Color.Red, Color.Blue)))
assertThat(secondTextLayout.layoutInput.style.brush)
.isEqualTo(Brush.linearGradient(listOf(Color.Green, Color.Yellow)))
}
@Test
fun shadowShouldChangeInResult_whenCacheIsActive() {
val textMeasurer = textMeasurer(cacheSize = 8)
val firstTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(shadow = Shadow(Color.Red))
), textMeasurer
)
val secondTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(shadow = Shadow(Color.Blue))
), textMeasurer
)
assertThat(firstTextLayout.multiParagraph).isSameInstanceAs(secondTextLayout.multiParagraph)
assertThat(firstTextLayout.layoutInput.style.shadow).isEqualTo(Shadow(Color.Red))
assertThat(secondTextLayout.layoutInput.style.shadow).isEqualTo(Shadow(Color.Blue))
}
@Test
fun textDecorationShouldChangeInResult_whenCacheIsActive() {
val textMeasurer = textMeasurer(cacheSize = 8)
val firstTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(textDecoration = TextDecoration.Underline)
), textMeasurer
)
val secondTextLayout = layoutText(
textLayoutInput(
text = longText,
style = TextStyle(textDecoration = TextDecoration.LineThrough)
), textMeasurer
)
assertThat(firstTextLayout.multiParagraph).isSameInstanceAs(secondTextLayout.multiParagraph)
assertThat(firstTextLayout.layoutInput.style.textDecoration)
.isEqualTo(TextDecoration.Underline)
assertThat(secondTextLayout.layoutInput.style.textDecoration)
.isEqualTo(TextDecoration.LineThrough)
}
private fun textLayoutInput(
text: AnnotatedString = AnnotatedString("Hello"),
style: TextStyle = TextStyle.Default,
placeholders: List> = emptyList(),
maxLines: Int = Int.MAX_VALUE,
softWrap: Boolean = true,
overflow: TextOverflow = TextOverflow.Clip,
density: Density = this.defaultDensity,
layoutDirection: LayoutDirection = this.layoutDirection,
fontFamilyResolver: FontFamily.Resolver = this.fontFamilyResolver,
constraints: Constraints = Constraints()
): TextLayoutInput {
return TextLayoutInput(
text = text,
style = style.merge(TextStyle(fontFamily = fontFamilyMeasureFont)),
placeholders = placeholders,
maxLines = maxLines,
softWrap = softWrap,
overflow = overflow,
density = density,
layoutDirection = layoutDirection,
fontFamilyResolver = fontFamilyResolver,
constraints = constraints
)
}
private fun multiParagraphIntrinsics(
text: AnnotatedString = AnnotatedString("Hello"),
style: TextStyle = TextStyle.Default,
placeholders: List> = emptyList(),
density: Density = this.defaultDensity,
layoutDirection: LayoutDirection = this.layoutDirection,
fontFamilyResolver: FontFamily.Resolver = this.fontFamilyResolver
): MultiParagraphIntrinsics {
return MultiParagraphIntrinsics(
annotatedString = text,
style = resolveDefaults(
style.merge(TextStyle(fontFamily = fontFamilyMeasureFont)),
layoutDirection
),
placeholders = placeholders,
density = density,
fontFamilyResolver = fontFamilyResolver
)
}
private fun textMeasurer(
fontFamilyResolver: FontFamily.Resolver = this.fontFamilyResolver,
density: Density = this.defaultDensity,
layoutDirection: LayoutDirection = this.layoutDirection,
cacheSize: Int = 0
): TextMeasurer = TextMeasurer(
fontFamilyResolver,
density,
layoutDirection,
cacheSize
)
private fun layoutText(
textLayoutInput: TextLayoutInput,
textMeasurer: TextMeasurer? = null
) = with(textLayoutInput) {
(textMeasurer ?: textMeasurer()).measure(
text = text,
style = style,
overflow = overflow,
softWrap = softWrap,
maxLines = maxLines,
placeholders = placeholders,
constraints = constraints,
)
}
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