Add support of `TextStyle::baselineShift` (#400)

skiko/src/commonMain/kotlin/org/jetbrains/skia/paragraph/TextStyle.kt

 package org.jetbrains.skia.paragraph
 
-import org.jetbrains.skia.impl.Library.Companion.staticLoad
 import org.jetbrains.skia.*
-import org.jetbrains.skia.ExternalSymbolName
 import org.jetbrains.skia.impl.*
+import org.jetbrains.skia.impl.Library.Companion.staticLoad
 
 class TextStyle internal constructor(ptr: NativePointer) : Managed(ptr, _FinalizerHolder.PTR) {
     companion object {
@@ -286,6 +285,23 @@ class TextStyle internal constructor(ptr: NativePointer) : Managed(ptr, _Finaliz
         return this
     }
 
+    var baselineShift: Float
+        get() = try {
+            Stats.onNativeCall()
+            TextStyle_nGetBaselineShift(_ptr)
+        } finally {
+            reachabilityBarrier(this)
+        }
+        set(value) {
+            setBaselineShift(value)
+        }
+
+    fun setBaselineShift(baselineShift: Float): TextStyle {
+        Stats.onNativeCall()
+        TextStyle_nSetBaselineShift(_ptr, baselineShift)
+        return this
+    }
+
     var wordSpacing: Float
         get() = try {
             Stats.onNativeCall()
@@ -426,6 +442,12 @@ private external fun TextStyle_nGetHeight(ptr: NativePointer): Float
 @ExternalSymbolName("org_jetbrains_skia_paragraph_TextStyle__1nSetHeight")
 private external fun TextStyle_nSetHeight(ptr: NativePointer, override: Boolean, height: Float)
 
+@ExternalSymbolName("org_jetbrains_skia_paragraph_TextStyle__1nGetBaselineShift")
+private external fun TextStyle_nGetBaselineShift(ptr: NativePointer): Float
+
+@ExternalSymbolName("org_jetbrains_skia_paragraph_TextStyle__1nSetBaselineShift")
+private external fun TextStyle_nSetBaselineShift(ptr: NativePointer, baselineShift: Float)
+
 @ExternalSymbolName("org_jetbrains_skia_paragraph_TextStyle__1nAttributeEquals")
 private external fun _nAttributeEquals(ptr: NativePointer, attribute: Int, otherPtr: NativePointer): Boolean
 

skiko/src/commonTest/kotlin/org/jetbrains/skiko/paragraph/TextStyleTest.kt

 package org.jetbrains.skiko.paragraph
 
 import org.jetbrains.skia.Color
-import org.jetbrains.skia.FontMetrics
 import org.jetbrains.skia.impl.use
 import org.jetbrains.skia.paragraph.DecorationLineStyle
 import org.jetbrains.skia.paragraph.DecorationStyle
 import org.jetbrains.skia.paragraph.TextStyle
 import org.jetbrains.skia.paragraph.TextStyleAttribute
-import org.jetbrains.skiko.tests.SkipJsTarget
-import org.jetbrains.skiko.tests.SkipNativeTarget
 import kotlin.test.*
 
 class TextStyleTest {
@@ -99,4 +96,13 @@ class TextStyleTest {
         }
     }
 
+    @Test
+    fun textStyleBaselineTest() {
+        TextStyle().use { textStyle ->
+            assertEquals(0.0f, textStyle.baselineShift)
+            textStyle.baselineShift = 4f
+            assertEquals(4f, textStyle.baselineShift)
+        }
+    }
+
 }

skiko/src/jvmMain/cpp/common/paragraph/TextStyle.cc

@@ -235,6 +235,18 @@ extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_paragraph_TextStyleKt_
     instance->setHeight(height);
 }
 
+extern "C" JNIEXPORT jfloat JNICALL Java_org_jetbrains_skia_paragraph_TextStyleKt_TextStyle_1nGetBaselineShift
+  (JNIEnv* env, jclass jclass, jlong ptr) {
+    TextStyle* instance = reinterpret_cast<TextStyle*>(static_cast<uintptr_t>(ptr));
+    return instance->getBaselineShift();
+}
+
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_paragraph_TextStyleKt_TextStyle_1nSetBaselineShift
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloat baselineShift) {
+    TextStyle* instance = reinterpret_cast<TextStyle*>(static_cast<uintptr_t>(ptr));
+    instance->setBaselineShift(baselineShift);
+}
+
 extern "C" JNIEXPORT jfloat JNICALL Java_org_jetbrains_skia_paragraph_TextStyleKt__1nGetLetterSpacing
   (JNIEnv* env, jclass jclass, jlong ptr) {
     TextStyle* instance = reinterpret_cast<TextStyle*>(static_cast<uintptr_t>(ptr));

skiko/src/jvmTest/kotlin/org/jetbrains/skiko/paragraph/TextStyleTest.kt

+package org.jetbrains.skiko.tests.org.jetbrains.skiko.paragraph
+
+import org.jetbrains.skia.*
+import org.jetbrains.skia.paragraph.*
+import org.jetbrains.skia.tests.makeFromResource
+import org.jetbrains.skiko.OS
+import org.jetbrains.skiko.hostOs
+import org.jetbrains.skiko.tests.runTest
+import org.jetbrains.skiko.util.ScreenshotTestRule
+import org.junit.Rule
+import org.junit.Test
+
+class TextStyleTest {
+    @get:Rule
+    val screenshots = ScreenshotTestRule()
+
+    @Test
+    fun canApplyBaselineShift() = runTest {
+        if (hostOs != OS.MacOS) {
+            return@runTest
+        }
+
+        val fontCollection = FontCollection().apply {
+            setDefaultFontManager(TypefaceFontProvider().apply {
+                val inter = Typeface.makeFromResource("./fonts/Inter-Hinted-Regular.ttf", 0)
+                registerTypeface(inter, "Inter")
+            })
+        }
+
+        fun buildTextStyle(baselineShift: Float, color: Int = Color.BLACK) = TextStyle().apply {
+            fontFamilies = arrayOf("Inter")
+            fontSize = 14.0f
+            this.color = color
+            this.baselineShift = baselineShift
+        }
+
+        val paragraphStyle = ParagraphStyle().apply {
+            height = 40.0f
+            maxLinesCount = 2
+            textStyle = buildTextStyle(0.0f)
+        }
+
+        val paragraph = ParagraphBuilder(paragraphStyle, fontCollection).run {
+            val text = "Hello "
+
+            addText(text)
+            pushStyle(buildTextStyle(10.0f, Color.RED))
+            addText(text)
+            pushStyle(buildTextStyle(-10.0f, Color.GREEN))
+            addText(text)
+            build()
+        }
+
+        val image = with (Surface.makeRasterN32Premul(200, 64)) {
+            canvas.drawRect(Rect(0.0f, 0.0f, width.toFloat(), height.toFloat()), Paint().apply { color = Color.WHITE })
+            paragraph.layout(Float.POSITIVE_INFINITY)
+            paragraph.paint(canvas, 30.0f, 20.0f)
+
+            makeImageSnapshot()
+        }
+
+        screenshots.assert(image)
+    }
+}
\ No newline at end of file

skiko/src/nativeJsMain/cpp/paragraph/TextStyle.cc

@@ -258,6 +258,18 @@ SKIKO_EXPORT void org_jetbrains_skia_paragraph_TextStyle__1nSetHeight
     instance->setHeight(height);
 }
 
+SKIKO_EXPORT KFloat org_jetbrains_skia_paragraph_TextStyle__1nGetBaselineShift
+  (KNativePointer ptr) {
+    TextStyle* instance = reinterpret_cast<TextStyle*>(ptr);
+    return instance->getBaselineShift();
+}
+
+SKIKO_EXPORT void org_jetbrains_skia_paragraph_TextStyle__1nSetBaselineShift
+  (KNativePointer ptr, KFloat baselineShift) {
+    TextStyle* instance = reinterpret_cast<TextStyle*>(ptr);
+    instance->setBaselineShift(baselineShift);
+}
+
 SKIKO_EXPORT KFloat org_jetbrains_skia_paragraph_TextStyle__1nGetLetterSpacing
   (KNativePointer ptr) {
     TextStyle* instance = reinterpret_cast<TextStyle*>(ptr);