androidAndroidTest.androidx.compose.ui.text.TextPainterTest.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 android.graphics.Bitmap
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Brush
import androidx.compose.ui.graphics.Canvas
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.graphics.drawscope.CanvasDrawScope
import androidx.compose.ui.graphics.drawscope.DrawScope
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.matchers.assertThat
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Density
import androidx.compose.ui.unit.IntSize
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.sp
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.MediumTest
import androidx.test.platform.app.InstrumentationRegistry
import org.junit.Test
import org.junit.runner.RunWith
@RunWith(AndroidJUnit4::class)
@MediumTest
class TextPainterTest {
private val fontFamilyMeasureFont = FontTestData.BASIC_MEASURE_FONT.toFontFamily()
private val context = InstrumentationRegistry.getInstrumentation().context
private val fontFamilyResolver = createFontFamilyResolver(context)
private var defaultDensity = Density(density = 1f)
private var 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."
)
@Test
fun drawTextWithMeasurer_shouldBeEqualTo_drawTextLayoutResult() {
val measurer = textMeasurer()
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(fontFamily = fontFamilyMeasureFont, fontSize = 20.sp),
constraints = Constraints(maxWidth = 400, maxHeight = 400)
)
val bitmap = draw {
drawText(textLayoutResult)
}
val bitmap2 = draw {
drawText(
measurer,
text = longText,
style = TextStyle(fontFamily = fontFamilyMeasureFont, fontSize = 20.sp),
maxSize = IntSize(400, 400)
)
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun textMeasurerCache_shouldNotAffectTheResult_forColor() {
val measurer = textMeasurer(cacheSize = 8)
val bitmap = draw {
drawText(
textMeasurer = measurer,
text = longText,
style = TextStyle(
color = Color.Red,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
maxSize = IntSize(400, 400)
)
}
val bitmap2 = draw {
drawText(
textMeasurer = measurer,
text = longText,
style = TextStyle(
color = Color.Blue,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
maxSize = IntSize(400, 400)
)
}
assertThat(bitmap).isNotEqualToBitmap(bitmap2)
}
@Test
fun textMeasurerCache_shouldNotAffectTheResult_forFontSize() {
val measurer = textMeasurer(cacheSize = 8)
val bitmap = draw {
drawText(
textMeasurer = measurer,
text = longText,
style = TextStyle(fontFamily = fontFamilyMeasureFont, fontSize = 20.sp),
maxSize = IntSize(400, 400)
)
}
val bitmap2 = draw {
drawText(
textMeasurer = measurer,
text = longText,
style = TextStyle(fontFamily = fontFamilyMeasureFont, fontSize = 24.sp),
maxSize = IntSize(400, 400)
)
}
assertThat(bitmap).isNotEqualToBitmap(bitmap2)
}
@Test
fun drawTextLayout_shouldChangeColor() {
val measurer = textMeasurer()
val textLayoutResultRed = measurer.measure(
text = longText,
style = TextStyle(
color = Color.Red,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val textLayoutResultBlue = measurer.measure(
text = longText,
style = TextStyle(
color = Color.Blue,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val bitmap = draw {
drawText(textLayoutResultRed, color = Color.Blue)
}
val bitmap2 = draw {
drawText(textLayoutResultBlue)
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun drawTextLayout_shouldChangeAlphaColor() {
val measurer = textMeasurer()
val textLayoutResultOpaque = measurer.measure(
text = longText,
style = TextStyle(
color = Color.Red,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val textLayoutResultHalfOpaque = measurer.measure(
text = longText,
style = TextStyle(
color = Color.Red.copy(alpha = 0.5f),
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val bitmap = draw {
drawText(textLayoutResultOpaque, alpha = 0.5f)
}
val bitmap2 = draw {
drawText(textLayoutResultHalfOpaque)
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun drawTextLayout_shouldChangeBrush() {
val rbBrush = Brush.radialGradient(listOf(Color.Red, Color.Blue))
val gyBrush = Brush.radialGradient(listOf(Color.Green, Color.Yellow))
val measurer = textMeasurer()
val textLayoutResultRB = measurer.measure(
text = longText,
style = TextStyle(
brush = rbBrush,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val textLayoutResultGY = measurer.measure(
text = longText,
style = TextStyle(
brush = gyBrush,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val bitmap = draw {
drawText(textLayoutResultRB, brush = gyBrush)
}
val bitmap2 = draw {
drawText(textLayoutResultGY)
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun drawTextLayout_shouldChangeAlphaForBrush() {
val rbBrush = Brush.radialGradient(listOf(Color.Red, Color.Blue))
val measurer = textMeasurer()
val textLayoutResultOpaque = measurer.measure(
text = longText,
style = TextStyle(
brush = rbBrush,
alpha = 1f,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val textLayoutResultHalfOpaque = measurer.measure(
text = longText,
style = TextStyle(
brush = rbBrush,
alpha = 0.5f,
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(400, 400)
)
val bitmap = draw {
drawText(textLayoutResultOpaque, alpha = 0.5f)
}
val bitmap2 = draw {
drawText(textLayoutResultHalfOpaque)
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun textMeasurerDraw_isConstrainedTo_canvasSizeByDefault() {
val measurer = textMeasurer()
// constrain the width, height is ignored
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
constraints = Constraints.fixed(200, 4000)
)
val bitmap = draw(200f, 4000f) {
drawText(textLayoutResult)
}
val bitmap2 = draw(200f, 4000f) {
drawText(measurer, longText, style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
))
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun textMeasurerDraw_usesCanvasDensity_ByDefault() {
val measurer = textMeasurer()
// constrain the width, height is ignored
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
),
density = Density(4f),
constraints = Constraints.fixed(1000, 1000)
)
val bitmap = draw {
drawText(textLayoutResult)
}
defaultDensity = Density(4f)
val bitmap2 = draw {
drawText(measurer, longText, style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 20.sp
))
}
assertThat(bitmap).isEqualToBitmap(bitmap2)
}
@Test
fun drawTextClipsTheContent_ifOverflowIsClip() {
val measurer = textMeasurer()
// constrain the width, height is ignored
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 14.sp
),
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints.fixed(200, 200)
)
val bitmap = draw(400f, 200f) {
drawText(textLayoutResult)
}
val croppedBitmap = Bitmap.createBitmap(bitmap, 200, 0, 200, 200)
// cropped part should be empty
assertThat(croppedBitmap).isEqualToBitmap(Bitmap.createBitmap(
200,
200,
Bitmap.Config.ARGB_8888))
}
@Test
fun drawTextClipsTheContent_ifOverflowIsEllipsis_ifLessThanOneLineFits() {
val measurer = textMeasurer()
with(defaultDensity) {
val fontSize = 20.sp
val height = fontSize.toPx().ceilToInt() / 2
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = fontSize
),
softWrap = false,
overflow = TextOverflow.Ellipsis,
constraints = Constraints.fixed(200, height)
)
val bitmap = draw(200f, 200f) {
drawText(textLayoutResult)
}
val croppedBitmap = Bitmap.createBitmap(bitmap, 0, height, 200, 200 - height)
// cropped part should be empty
assertThat(croppedBitmap).isEqualToBitmap(
Bitmap.createBitmap(
200,
200 - height,
Bitmap.Config.ARGB_8888
)
)
}
}
@Test
fun drawTextDoesNotClipTheContent_ifOverflowIsVisible() {
val measurer = textMeasurer()
// constrain the width, height is ignored
val textLayoutResult = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 14.sp
),
softWrap = false,
overflow = TextOverflow.Clip,
constraints = Constraints.fixed(400, 200)
)
val textLayoutResultNoClip = measurer.measure(
text = longText,
style = TextStyle(
fontFamily = fontFamilyMeasureFont,
fontSize = 14.sp
),
softWrap = false,
overflow = TextOverflow.Visible,
constraints = Constraints.fixed(200, 200)
)
val bitmap = draw(400f, 200f) {
drawText(textLayoutResult)
}
val bitmapNoClip = draw(400f, 200f) {
drawText(textLayoutResultNoClip)
}
// cropped part should be empty
assertThat(bitmap).isEqualToBitmap(bitmapNoClip)
}
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
)
fun draw(
width: Float = 1000f,
height: Float = 1000f,
block: DrawScope.() -> Unit
): Bitmap {
val size = Size(width, height)
val bitmap = Bitmap.createBitmap(
size.width.toIntPx(),
size.height.toIntPx(),
Bitmap.Config.ARGB_8888
)
val canvas = Canvas(bitmap.asImageBitmap())
val drawScope = CanvasDrawScope()
drawScope.draw(
defaultDensity,
layoutDirection,
canvas,
size,
block
)
return bitmap
}
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