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113
...es/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/fresco/XmlFormat.kt
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| /* | ||
| * Copyright (c) Meta Platforms, Inc. and affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| */ | ||
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|
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| package com.facebook.react.modules.fresco | ||
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| import android.content.Context | ||
| import android.graphics.drawable.Drawable | ||
| import android.net.Uri | ||
| import com.facebook.common.logging.FLog | ||
| import com.facebook.imageformat.ImageFormat | ||
| import com.facebook.imageformat.ImageFormat.FormatChecker | ||
| import com.facebook.imageformat.ImageFormatCheckerUtils | ||
| import com.facebook.imagepipeline.common.ImageDecodeOptions | ||
| import com.facebook.imagepipeline.decoder.ImageDecoder | ||
| import com.facebook.imagepipeline.drawable.DrawableFactory | ||
| import com.facebook.imagepipeline.image.CloseableImage | ||
| import com.facebook.imagepipeline.image.DefaultCloseableImage | ||
| import com.facebook.imagepipeline.image.EncodedImage | ||
| import com.facebook.imagepipeline.image.QualityInfo | ||
|
|
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| public object XmlFormat { | ||
| public val FORMAT: ImageFormat = ImageFormat("XML", "xml") | ||
| private const val TAG: String = "XmlFormat" | ||
| /** | ||
| * These are the first 4 bytes of a binary XML file. We can only support binary XML files and not | ||
| * raw XML files because Android explicitly disallows raw XML files when inflating drawables. | ||
| * Binary XML files are created at build time by Android's AAPT. | ||
| * | ||
| * @see | ||
| * https://developer.android.com/reference/android/view/LayoutInflater#inflate(org.xmlpull.v1.XmlPullParser,%20android.view.ViewGroup) | ||
| */ | ||
| private val BINARY_XML_HEADER: ByteArray = | ||
| byteArrayOf( | ||
| 3.toByte(), | ||
| 0.toByte(), | ||
| 8.toByte(), | ||
| 0.toByte(), | ||
| ) | ||
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|
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| public class XmlFormatChecker : FormatChecker { | ||
| override val headerSize: Int = BINARY_XML_HEADER.size | ||
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| override fun determineFormat(headerBytes: ByteArray, headerSize: Int): ImageFormat { | ||
| return when { | ||
| headerSize < BINARY_XML_HEADER.size -> ImageFormat.UNKNOWN | ||
| ImageFormatCheckerUtils.startsWithPattern(headerBytes, BINARY_XML_HEADER) -> FORMAT | ||
| else -> ImageFormat.UNKNOWN | ||
| } | ||
| } | ||
| } | ||
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| private class CloseableXmlImage(val name: String, val drawable: Drawable) : | ||
| DefaultCloseableImage() { | ||
| private var closed = false | ||
|
|
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| override fun getSizeInBytes(): Int { | ||
| return getWidth() * getHeight() * 4 // 4 bytes ARGB per pixel | ||
| } | ||
|
|
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| override fun close() { | ||
| closed = true | ||
| } | ||
|
|
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| override fun isClosed(): Boolean { | ||
| return closed | ||
| } | ||
|
|
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| override fun getWidth(): Int { | ||
| return drawable.intrinsicWidth.takeIf { it >= 0 } ?: 0 | ||
| } | ||
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| override fun getHeight(): Int { | ||
| return drawable.intrinsicHeight.takeIf { it >= 0 } ?: 0 | ||
| } | ||
| } | ||
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| public class XmlFormatDecoder(private val context: Context) : ImageDecoder { | ||
| override fun decode( | ||
| encodedImage: EncodedImage, | ||
| length: Int, | ||
| qualityInfo: QualityInfo, | ||
| options: ImageDecodeOptions | ||
| ): CloseableImage? { | ||
| return try { | ||
| val xmlResourceName = encodedImage.source ?: error("No source in encoded image") | ||
| val xmlResource = Uri.parse(xmlResourceName) | ||
| // Android resource names are of the format [res|resources]:/[?package]/[res id] | ||
| val xmlResourceId = | ||
| xmlResource.pathSegments.lastOrNull()?.toIntOrNull() ?: error("Invalid resource id") | ||
| // Use application context to avoid leaking the activity | ||
| val drawable = context.applicationContext.resources.getDrawable(xmlResourceId, null) | ||
| CloseableXmlImage(xmlResourceName, drawable) | ||
| } catch (error: Throwable) { | ||
| FLog.e(TAG, "Cannot decode xml ${error}", error) | ||
| null | ||
| } | ||
| } | ||
| } | ||
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| public class XmlDrawableFactory : DrawableFactory { | ||
| override fun supportsImageType(image: CloseableImage): Boolean { | ||
| return image is CloseableXmlImage | ||
| } | ||
|
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| override fun createDrawable(image: CloseableImage): Drawable? { | ||
| return (image as CloseableXmlImage).drawable | ||
| } | ||
| } | ||
| } |