XmlPullParserUtils.android.kt
/*
* Copyright 2021 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.animation.graphics.vector.compat
import android.content.res.Resources
import android.content.res.TypedArray
import android.util.AttributeSet
import org.xmlpull.v1.XmlPullParser
import org.xmlpull.v1.XmlPullParserException
internal fun XmlPullParser.isAtEnd(): Boolean =
eventType == XmlPullParser.END_DOCUMENT ||
(depth < 1 && eventType == XmlPullParser.END_TAG)
/**
* Helper method to seek to the first tag within the VectorDrawable xml asset
*/
@Throws(XmlPullParserException::class)
internal fun XmlPullParser.seekToStartTag(): XmlPullParser {
var type = next()
while (type != XmlPullParser.START_TAG && type != XmlPullParser.END_DOCUMENT) {
// Empty loop
type = next()
}
if (type != XmlPullParser.START_TAG) {
throw XmlPullParserException("No start tag found")
}
return this
}
/**
* Assuming that we are at the [XmlPullParser.START_TAG start] of the specified [tag], iterates
* though the events until we see a corresponding [XmlPullParser.END_TAG].
*/
internal inline fun XmlPullParser.forEachChildOf(
tag: String,
action: XmlPullParser.() -> Unit
) {
next()
while (!isAtEnd()) {
if (eventType == XmlPullParser.END_TAG && name == tag) {
break
}
action()
next()
}
}
internal inline fun <T> AttributeSet.attrs(
res: Resources,
theme: Resources.Theme?,
styleable: IntArray,
body: (a: TypedArray) -> T
): T {
val a = theme?.obtainStyledAttributes(this, styleable, 0, 0)
?: res.obtainAttributes(this, styleable)
try {
return body(a)
} finally {
a.recycle()
}
}