Support setting custom CSS rules for SVG. (#1210)

* Support setting custom CSS rules for SVG.

* Update API.

* Remove.

coil-svg/api/coil-svg.api

@@ -3,13 +3,18 @@ public final class coil/decode/SvgDecodeUtils {
 }
 
 public final class coil/decode/SvgDecoder : coil/decode/Decoder {
+	public static final field CSS_KEY Ljava/lang/String;
+	public static final field Companion Lcoil/decode/SvgDecoder$Companion;
 	public fun <init> (Lcoil/decode/ImageSource;Lcoil/request/Options;)V
 	public fun <init> (Lcoil/decode/ImageSource;Lcoil/request/Options;Z)V
 	public synthetic fun <init> (Lcoil/decode/ImageSource;Lcoil/request/Options;ZILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public fun decode (Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
 	public final fun getUseViewBoundsAsIntrinsicSize ()Z
 }
 
+public final class coil/decode/SvgDecoder$Companion {
+}
+
 public final class coil/decode/SvgDecoder$Factory : coil/decode/Decoder$Factory {
 	public fun <init> ()V
 	public fun <init> (Z)V
@@ -20,3 +25,8 @@ public final class coil/decode/SvgDecoder$Factory : coil/decode/Decoder$Factory
 	public fun hashCode ()I
 }
 
+public final class coil/request/Svgs {
+	public static final fun css (Lcoil/request/ImageRequest$Builder;Ljava/lang/String;)Lcoil/request/ImageRequest$Builder;
+	public static final fun css (Lcoil/request/Parameters;)Ljava/lang/String;
+}
+

coil-svg/src/main/java/coil/decode/SvgDecoder.kt

@@ -7,10 +7,12 @@ import androidx.core.graphics.drawable.toDrawable
 import coil.ImageLoader
 import coil.fetch.SourceResult
 import coil.request.Options
+import coil.request.css
 import coil.size.Scale
 import coil.size.isOriginal
 import coil.util.toPx
 import coil.util.toSoftware
+import com.caverock.androidsvg.RenderOptions
 import com.caverock.androidsvg.SVG
 import kotlinx.coroutines.runInterruptible
 import kotlin.math.roundToInt
@@ -69,7 +71,8 @@ class SvgDecoder @JvmOverloads constructor(
         svg.setDocumentHeight("100%")
 
         val bitmap = createBitmap(bitmapWidth, bitmapHeight, options.config.toSoftware())
-        svg.renderToCanvas(Canvas(bitmap))
+        val renderOptions = options.parameters.css()?.let { RenderOptions().css(it) }
+        svg.renderToCanvas(Canvas(bitmap), renderOptions)
 
         DecodeResult(
             drawable = bitmap.toDrawable(options.context.resources),
@@ -110,8 +113,9 @@ class SvgDecoder @JvmOverloads constructor(
         override fun hashCode() = useViewBoundsAsIntrinsicSize.hashCode()
     }
 
-    private companion object {
+    companion object {
         private const val MIME_TYPE_SVG = "image/svg+xml"
         private const val DEFAULT_SIZE = 512f
+        const val CSS_KEY = "coil#css"
     }
 }

coil-svg/src/main/java/coil/request/Svgs.kt

@@ -0,0 +1,19 @@
+@file:Suppress("UNCHECKED_CAST")
+@file:JvmName("Svgs")
+
+package coil.request
+
+import coil.decode.SvgDecoder.Companion.CSS_KEY
+
+/**
+ * Specifies additional CSS rules that will be applied when rendering an SVG in addition to any
+ * rules specified in the SVG itself.
+ */
+fun ImageRequest.Builder.css(css: String): ImageRequest.Builder {
+    return setParameter(CSS_KEY, css)
+}
+
+/**
+ * Get the additional CSS rules.
+ */
+fun Parameters.css(): String? = value(CSS_KEY)