| /* |
| * Copyright 2020 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 android.content.Context |
| import android.graphics.Bitmap |
| import android.graphics.Typeface |
| import androidx.core.content.res.ResourcesCompat |
| import androidx.test.filters.SmallTest |
| import androidx.test.platform.app.InstrumentationRegistry |
| import androidx.ui.core.Constraints |
| import androidx.ui.core.LayoutDirection |
| import androidx.compose.ui.graphics.Canvas |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.graphics.Paint |
| import androidx.compose.ui.text.input.TextFieldValue |
| import androidx.compose.ui.text.input.OffsetMap |
| import androidx.compose.ui.text.AnnotatedString |
| import androidx.compose.ui.text.InternalTextApi |
| import androidx.compose.ui.text.TextDelegate |
| import androidx.compose.ui.text.TextLayoutResult |
| import androidx.compose.ui.text.TextPainter |
| import androidx.compose.ui.text.TextRange |
| import androidx.compose.ui.text.TextStyle |
| import androidx.compose.ui.text.font.Font |
| import androidx.compose.ui.text.font.ResourceFont |
| import androidx.ui.unit.Density |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @OptIn(InternalTextApi::class) |
| @RunWith(JUnit4::class) |
| @SmallTest |
| class TextFieldDelegateIntegrationTest { |
| private val density = Density(density = 1f) |
| private val context = InstrumentationRegistry.getInstrumentation().context |
| private val resourceLoader = TestFontResourceLoader(context) |
| private val layoutDirection = LayoutDirection.Ltr |
| |
| private class TestFontResourceLoader(val context: Context) : Font.ResourceLoader { |
| override fun load(font: Font): Typeface { |
| return when (font) { |
| is ResourceFont -> ResourcesCompat.getFont(context, font.resId)!! |
| else -> throw IllegalArgumentException("Unknown font type: $font") |
| } |
| } |
| } |
| |
| @Test |
| fun draw_selection_test() { |
| val textDelegate = TextDelegate( |
| text = AnnotatedString("Hello, World"), |
| style = TextStyle.Default, |
| maxLines = 2, |
| density = density, |
| resourceLoader = resourceLoader |
| ) |
| val selection = TextRange(0, 1) |
| val selectionColor = Color.Blue |
| val layoutResult = textDelegate.layout(Constraints.fixedWidth(1024), layoutDirection) |
| |
| val expectedBitmap = layoutResult.toBitmap() |
| val expectedCanvas = Canvas(android.graphics.Canvas(expectedBitmap)) |
| TextDelegate.paintBackground( |
| 0, |
| 1, |
| Paint().also { it.color = selectionColor }, |
| expectedCanvas, |
| layoutResult |
| ) |
| TextPainter.paint(expectedCanvas, layoutResult) |
| |
| val actualBitmap = layoutResult.toBitmap() |
| val actualCanvas = Canvas(android.graphics.Canvas(actualBitmap)) |
| TextFieldDelegate.draw( |
| canvas = actualCanvas, |
| value = TextFieldValue(text = "Hello, World", selection = selection), |
| selectionColor = selectionColor, |
| offsetMap = OffsetMap.identityOffsetMap, |
| textLayoutResult = layoutResult |
| ) |
| |
| assertThat(actualBitmap.sameAs(expectedBitmap)).isTrue() |
| } |
| |
| @Test |
| fun layout_height_constraint_max_height() { |
| val textDelegate = TextDelegate( |
| text = AnnotatedString("Hello, World"), |
| style = TextStyle.Default, |
| maxLines = 2, |
| density = density, |
| resourceLoader = resourceLoader |
| ) |
| val layoutResult = textDelegate.layout(Constraints.fixedWidth(1024), layoutDirection) |
| val requestHeight = layoutResult.size.height / 2 |
| |
| val (_, height, _) = TextFieldDelegate.layout( |
| textDelegate, |
| Constraints.fixedHeight(requestHeight), |
| layoutDirection |
| ) |
| |
| assertThat(height).isEqualTo(requestHeight) |
| } |
| |
| @Test |
| fun layout_height_constraint_min_height() { |
| val textDelegate = TextDelegate( |
| text = AnnotatedString("Hello, World"), |
| style = TextStyle.Default, |
| maxLines = 2, |
| density = density, |
| resourceLoader = resourceLoader |
| ) |
| val layoutResult = textDelegate.layout(Constraints.fixedWidth(1024), layoutDirection) |
| val requestHeight = layoutResult.size.height * 2 |
| |
| val (_, height, _) = TextFieldDelegate.layout( |
| textDelegate, |
| Constraints.fixedHeight(requestHeight), |
| layoutDirection |
| ) |
| |
| assertThat(height).isEqualTo(requestHeight) |
| } |
| } |
| |
| private fun TextLayoutResult.toBitmap() = Bitmap.createBitmap( |
| size.width, |
| size.height, |
| Bitmap.Config.ARGB_8888 |
| ) |